US20110206492A1 - Downhole tool protector apparatus and method - Google Patents
Downhole tool protector apparatus and method Download PDFInfo
- Publication number
- US20110206492A1 US20110206492A1 US13/061,851 US200913061851A US2011206492A1 US 20110206492 A1 US20110206492 A1 US 20110206492A1 US 200913061851 A US200913061851 A US 200913061851A US 2011206492 A1 US2011206492 A1 US 2011206492A1
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- US
- United States
- Prior art keywords
- protector
- portions
- drill bit
- protector apparatus
- downhole tool
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B12/00—Accessories for drilling tools
- E21B12/04—Drill bit protectors
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
Abstract
An oil, gas or water borehole drill bit protector apparatus (10, 100, 200, 300, 400) comprises one or more protector portions (10A, 10B; 100A, 100B) adapted to be placed around and/or adapted to envelope at least a drilling portion of the drill bit; and the one or more protector portions comprising an aperture (16) through which a connection portion of the drill bit projects in use. The one or more protector portions are placed around and/or enveloping the drilling portion of the drill bit; and closed around the drilling portion of the drill bit such that the connection portion of the drill bit projects through the aperture of the one or more protector portions.
Description
- The present invention relates to a downhole tool protector apparatus and method and more particularly but not exclusively relates to a method of and apparatus for protecting a downhole tool that requires protection particularly during transportation or storage when not in use such as a drill bit, a rotary steerable tool, reamer, milling tool, melon mill or the like.
- Conventionally, drilling wells for oil and gas involves making up a Bottom Hole Assembly (BHA), which is an assortment of drilling tools screwed and torqued together to make up a drill string on a drilling rig. However, this assembly and disassembly of drilling tools that make up the drill string is time consuming and most wells require multiple BHAs (4-20+) before completion which add considerable cost to any drilling campaign because every hour of rig time can cost an operator from £8,000-£16,000 at August 2008 rates. Therefore the cost associated with such a make-up/break-out of a BHA can run from £192,000-£2 million (depending upon the amount of BHAs required and the rig rate) per well.
- An essential element of each BHA is the drill bit. Such drill bits are actually relatively fragile and are prone to damage if dropped or accidentally struck by other pieces of machinery but such drill bits are also very expensive (each drill bit costing from £5,000-£150,000 each). Consequently, it is very important to protect the drill bits during transportation and storage whilst they are not in use. Conventionally, drill bits would be hung upside down within a breaker plate whilst in transportation and/or storage. The breaker plate is essentially C-shaped with an opening on one side such that the upper end of the drill bit can be inserted into the open side of the C-shaped breaker plate until the drill bit sits in the middle of the breaker plate and a gate is closed across the open side thereof such that the gate locks the drill bit in the breaker plate. The drill bit is vertically secured to the breaker plate by means of a pair of straight edged slots being formed on opposite sides of the substantially cylindrical outer housing of the drill bit, where the straight edged slots accept the straight edged sides of the aperture formed in the breaker plate (the width of the aperture formed in the breaker plate being just slightly larger than the width of the drill bit at the height having the straight edged slots) such that the drill bit is prevented from rotating with respect to the breaker plate whilst being held therein. The breaker plate is crucial in the making up of a BHA in that, when offshore on a drilling rig, the breaker plate and drill bit are lowered onto the drill rig floor and into a rotary table provided therein such that the breaker plate is then fixed to the drilling rotary table. The rest of the BHA, typically a large motor such as a mud motor, is conventionally then swung above the upper end of the drill bit and the large motor is threaded onto an upper most thread of the drill bit and can be torqued onto the drill bit using manual rig tongs such that the connection between the mud motor and the drill bit is “made up”. The breaker plate therefore holds the drill bit tight such that the motor can be torqued onto the upstanding threaded pin or threaded box of the drill bit.
- The drill bit as described above is held in the breaker plate and dangles down there from during storage or transportation. Furthermore, in order to further protect the drill bit, the breaker plate in turn is mounted to the upper open end of a box termed a “bit box”, the upper open end having four upstanding pins at each corner and said pins are threaded through four corresponding holes provided at each corner of the breaker plate such that the breaker plate essentially forms the uppermost side of the bit box and the bit dangles down from the breaker plate within the interior of the bit box. In the case of some designs of bits, transportation is in the form of cardboard or wooden boxes due to no breaker straight edged slots being present on the drill bit.
- Such a conventional method of transporting and storing drill bits and making up BHAs on drilling rigs has a number of problems and disadvantages associated therewith. Firstly, making up the drill bit into the rest of the BHA on the drilling rig is expensive because of the cost of running a drill rig, particularly an offshore rig, and therefore anything that can be done to reduce the time involved in making up a BHA on a drill rig is advantageous. Furthermore, torqueing up the drill bit to the motor with manual rig tongs is dangerous, particularly because of the weight of the drill bit and the large motor.
- It would be highly desirable to be able to make up the drill bit and the motor onshore and transport the combined drill bit and motor offshore already made up to one another. However, bit boxes for protecting the drill bit require the breaker plate to be in place around the drill bit. Unfortunately, it would be very dangerous to transport a drill bit plus large motor with a breaker plate attached there between because of the weight of the bit box and the breaker plate in particular—these are typically in the region of 25-100 kg and because a combined drill bit and large motor would by necessity have to be transported horizontally, conventional breaker plates would be very dangerous to be transported in that configuration because the person on the drilling rig would suffer a serious likelihood of injury if they tried to remove a breaker plate when it is arranged in a vertical plane around the neck of a drill bit lying horizontally or there is the potential of dropping either or both of the drill bit and breaker plate due to a lack of secure holding points.
- It is therefore an object of the present invention to overcome one or more of the above described disadvantages of conventional bit boxes and methods of transporting and storing drill bits.
- Furthermore, other tools included in the BHA and further up the drill string such as rotary steerable tools, reamers, milling tools, melon mills and the like are also high value and it would be desirable to protect them during transportation and storage when not in use. Such other tools are provided with connections at each end such that they may be included in the drill string.
- According to a first aspect of the present invention there is provided an oil, gas or water borehole drill bit protector apparatus comprising:—
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- one or more protector portions adapted to be placed around and/or adapted to envelope at least a drilling portion of the drill bit; and
- the one or more protector portions comprising an aperture through which a connection portion of the drill bit projects in use.
- According to the first aspect of the present invention there is also provided a method of protecting a drill bit comprising:—
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- providing a protector apparatus according to the first aspect of the present invention;
- placing the one or more protector portions around and/or enveloping the drilling portion of the drill bit; and
- closing the protector portions around the drilling portion of the drill bit such that the connection portion of the drill bit projects through the aperture of the one or more protector portions.
- According to a second aspect of the present invention there is provided a protector apparatus for protecting an oil, gas or water borehole downhole tool having connections at each end, the protector apparatus comprising:—
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- one or more protector portions adapted to be placed around and/or adapted to envelope at least a middle portion of the downhole tool; and
- the one or more protector portions comprising an aperture at each end through which a respective end connection portion of the downhole tool projects in use.
- According to the second aspect of the present invention there is also provided a method of protecting an oil, gas or water borehole downhole tool having connections at each end, the method comprising:—
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- providing a protector apparatus according to the second aspect of the present invention;
- placing the one or more protector portions around and/or enveloping the middle portion of the downhole tool; and
- closing the protector portions around the middle portion of the downhole tool such that the pair of connection portion of the downhole tool project through the respective apertures of the one or more protector portions.
- Preferably, the protector apparatus according to the first and second aspects of the present invention comprise two portions which may be substantially semi-circular in internal cross section and which when closed around a drill bit or downhole tool provide a generally circular internal diameter.
- Typically, the said two portions are coupled together by a hinge mechanism which may be either integrally formed with the two portions such that the protector apparatus is moulded or otherwise formed as a one piece component or may be formed by a separate hinge member such that the hinge member connects the said two portions. The said two portions typically comprise respective longitudinal axes with the hinge mechanism being provided along one longitudinal edge of the respective two portions.
- Preferably, the protector apparatus further comprises a locking mechanism to lock the two or more portions together preferably about the drill bit or downhole tool. Typically, the locking mechanism is provided at, on or along the other longitudinal edge of the respective two portions such that the locking mechanism is formed on the opposite longitudinal edge of the two portions from the hinge mechanism.
- In certain preferred embodiments, the hinge member and the locking mechanism may be provided by a strapping arrangement such as by one or more straps which firstly connect the two portions together and secondly can be connected to one another to form the locking mechanism. More preferably, the one or more straps are embedded within the two portions such that a middle portion of the one or more straps forms the hinge member and the ends of the one or more straps can be connected together to form the locking mechanism.
- Preferably, the two portions of the protector apparatus according to the first aspect of the invention when brought together provide a generally cylindrical inner bore having a closed lowermost in use end and an in use upper most end having a means to prevent movement occurring between the protector apparatus and the drill bit. Preferably the said in use uppermost end further comprises the aperture through which the connection portion of the drill bit projects in use. Preferably, the means to prevent movement occurring comprise shoulder portions adapted to abut with a portion of the drill bit which may be shoulder portions of the drill bit, such that the aperture in the in use uppermost end is a smaller diameter than the upper most in use end of the drilling portion of the drill bit such that the shoulder portions of the protector apparatus hang off the shoulder portions of the drill bit.
- Preferably, the two portions of the protector apparatus according to the second aspect of the invention when brought together provide a generally cylindrical inner bore having an aperture provided at each of the uppermost and lower most in use ends and further comprising a means to prevent movement occurring between the protector apparatus and the downhole tool. Preferably the uppermost connection portion of the downhole tool projects in use through the uppermost aperture of the protector apparatus of the second aspect and the said lowermost connection portion of the downhole tool projects in use through the lowermost aperture of the protector apparatus of the second aspect. Preferably, the means to prevent movement occurring comprise shoulder portions adapted to abut with a portion of the downhole tool which may be shoulder portions of the downhole tool, such that the apertures in the in use upper and lowermost ends are of a smaller diameter than the respective upper and lowermost in use ends of the middle portion of the downhole tool such that the shoulder portions of the protector apparatus hang off the shoulder portions of the downhole tool.
- A gap or annulus between the outer surface of the drilling portion of the drill bit or downhole tool and the inner bore of the protector apparatus of the respective first and second aspect may be filled by a packing material wherein said packing material may be any suitable type of packing such as foam, rubber, neoprene, injected foam, sponge foam, an inflatable member such as air bags, or fluid filled bags or other suitable type of packing material such that the respective drill bit or downhole tool is securely held in the respective bit box or downhole tool box.
- According to a third aspect of the present invention there is provided a method of transporting an oil gas or water borehole drill bit to a drilling rig comprising the steps of:—
- a) providing a protector apparatus according to the first aspect;
- b) making up a connection between the drill bit and a motor or other portion of a BHA;
- c) placing the protector apparatus around the drill bit either before step b) or after step b) and performing the method of protecting the drill bit according to the first aspect of the present invention; and
- d) transporting the drill bit and motor or other portion of BHA made up together and the protector apparatus to the drilling rig.
- Typically, the connection between the drill bit and the motor or other portion of BHA is made up in a make up/break out facility on land and is subsequently transported to a drilling rig offshore. The made up drill bit and motor or other portion of BHA and the protector apparatus may be stored on or in close proximity to the drilling rig until such a time that the made up drill bit and rest of BHA is required to drill a borehole, at which point it may be connected to the lower most end of a drill string, the protector apparatus removed by unlocking the locking mechanism and the drill bit may be run into the borehole.
- Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which:—
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FIG. 1( a) is a cross section side view of a first embodiment of a bit box in accordance with the first aspect of the present invention, and is shown as housing a drill bit; -
FIG. 1( b) shows an end view (bottom end) of the bit box ofFIG. 1( a); -
FIG. 1( c) shows a plan view of the bit box ofFIG. 1( b) but in an open configuration; -
FIG. 1( d) is a close up view of one possible embodiment of a locking mechanism for locking the bit box ofFIG. 1( b); -
FIG. 1( e) is a side view of locking strip for insertion into the locking mechanism ofFIG. 1( d); -
FIG. 2( a) is cross-sectional side view of the bit box ofFIG. 1( a) but without the drill bit or packing elements for clarity; -
FIG. 2( b) is a bottom end view of the bit box ofFIG. 2( a); -
FIG. 2( c) is a cross-sectional plan view of the bit box ofFIG. 2( b) but in an open configuration; -
FIG. 3( a) is a cross-sectional side view of a second embodiment of bit box in accordance with the first aspect of the present invention, shown in a closed configuration, and being provided in a first (largest) size (design 1) which is suitable for use with a drill bit ranging from 12¼ inch diameter to 17½ inch diameter drill bits; -
FIG. 3( b) is a side view of the bit box ofFIG. 3( a) but in an open configuration; -
FIG. 3( c) is a plan view of the uppermost end of the bit box ofFIG. 3( a) but in an open configuration; -
FIG. 3( d) is a perspective view of the bit box ofFIG. 3( a) but in an open configuration; -
FIG. 3( e) is a plan view of the bit box ofFIG. 3( c); -
FIG. 4( a) is a smaller size version (design 2) of the bit box ofFIG. 3( a), again shown in a closed configuration, where design 2 is suitable for housing a smaller drill bit ranging from 8½ inch to 12¼ inch diameter; -
FIG. 4( b) is a side view of the bit box ofFIG. 4( a) but in an open configuration; -
FIG. 4( c) is a plan view of the uppermost end of the bit box ofFIG. 4( a) but in an open configuration; -
FIG. 4( d) is a perspective view of the bit box ofFIG. 4( a) but in an open configuration; -
FIG. 4( e) is a plan view of the bit box ofFIG. 4( c); -
FIG. 5( a) is a yet smaller size version (design 3) of the bit box ofFIG. 3( a), again shown in a closed configuration, where design 3 is suitable for housing a drill bit ranging from 6⅛th inch to 8½ inch diameter; -
FIG. 5( b) is a side view of the bit box ofFIG. 5( a) but in an open configuration; -
FIG. 5( c) is a plan view of the uppermost end of the bit box ofFIG. 5( a) but in an open configuration; -
FIG. 5( d) is a perspective view of the bit box ofFIG. 5( a) but in an open configuration; -
FIG. 5( e) is a plan view of the bit box ofFIG. 5( c); -
FIG. 6( a) is a smallest size version (design 4) of the bit box ofFIG. 3( a), again shown in a closed configuration, where design 4 is suitable for housing a 2⅞th inch outer diameter drill bit to a 6 inch drill bit; -
FIG. 6( b) is a side view of the bit box ofFIG. 6( a) but in an open configuration; -
FIG. 6( c) is a plan view of the uppermost end of the bit box ofFIG. 6( a) but in an open configuration; -
FIG. 6( d) is a perspective view of the bit box ofFIG. 6( a) but in an open configuration; -
FIG. 6( e) is a plan view of the bit box ofFIG. 6( c); -
FIG. 7( a) is a perspective view of a further embodiment of bit box in a closed configuration; -
FIG. 7( b) is a perspective cross sectional view of the bit box ofFIG. 7( a); -
FIG. 7( c) is a side elevation of the bit box ofFIG. 7( a) in an open configuration; -
FIG. 7( d) is a plan view of the bit box ofFIG. 7( a); -
FIG. 7( e) is a cross sectional view on the line A-A through a half of the bit box ofFIG. 7( d); -
FIG. 7( f) is a top elevation of the bit box ofFIG. 7( a), and -
FIG. 7( g) is an end elevation of the bit box ofFIG. 7( a). -
FIG. 1( a) shows a cross-sectional side view of abit box 10 in accordance with the first aspect of the present invention for safely and securely housing and thereby protecting adrill bit 12. Thebit box 10 is shown inFIG. 1( b) in the closed configuration and inFIG. 1( c) in the open configuration as comprising a generally cylindrical housing having a cylindrical main inner bore with a substantially cylindrical outer surface although it should be noted that, although the inner circumference of thebit box 10 is preferably cylindrical to suit the generally cylindrical outer circumference of most drill bits, the outer surface may be any suitable shape such as square, hexagonal, pentagonal etc. - The
bit box 10 is suitable for housing substantially any conventional drill bit used in the oil & gas exploration industry such as the five main types of drill bits, these being:— - a) Polycrystalline Diamond Compact (PDC);
- b) Tri Cone bits;
- c) Impregnated Diamond bits (Impreg);
- d) Two Cone bits; and
- e) Mono cone bits.
- The
bit box 10 as shown inFIG. 1( c) is preferably provided in more than one main piece such that they can be brought close to and closed around the drill bit in order that it at least partially envelopes and preferably completely envelopes the relatively fragile cutting elements of the drill bit. Most preferably, thebit box 10 is provided in twosemi-circular halves hinge 18. The hinge may be formed as shown inFIG. 1( c) as an integral part of thebit box 10 or could be provided by a suitable knuckle joint arrangement where eachsemi-circular half - The two halves can be placed around a drill bit to be protected such that the two halves are closed about the
hinge 18 such that the opposingedges hinge 18 come together to form alocking mechanism 20. - As can be seen in
FIG. 1 (a) the gap between the outer surface of the drill bit and inner circumference of thebit box 10 is filled with a suitable filling material such as rubber or neoprene packing 14 or another suitable type of packing such as foam, injected foam, sponge foam, inflatable air bags, or fluid filled bags or other suitable type of packing material such that the drill bit is securely held in thebit box 10. In certain circumstances, the packing material such as sponge foam etc could be specifically designed to match the outer circumference of the drill bit to minimise any possible movement of the drill bit relative to thebit box 10. - Locking
mechanism 20 as shown inFIG. 1( b) is locked by inserting a lockingstrip 22 along its length but again the locking mechanism could be provided by a number of alternating bores that interlock to form a long bore and into which a locking pin can be inserted along the entire length c of thebit box 10 such that thebit box 10 is selectively locked in the closed position as shown inFIG. 1( a) andFIG. 1( b). However it should be noted that thelocking mechanism 20 could take any other suitable configuration or arrangement that provides a suitable locking mechanism. As shown inFIG. 1( a) when thebit box 10 is in the locked configuration, its in uselowermost end 24 is completely closed whereas itsuppermost end 26 comprises acentral aperture 16 formed therein but also comprises ashoulder portion 17. Thecentral aperture 16 allows the threadedpin 12P of thedrill bit 12 to project therethrough whilst theshoulder portion 17 extends over and around the upper shoulder portions 12S of the drill bit and thus theshoulder portion 17 of thebit box 10 ensures that thebit box 10 cannot be pulled off thedrill bit 12 as long as thelocking mechanism 20 remains locked. Nevertheless, theaperture 16 allows the threaded pin 12B to project therethrough and thus allows the threadedpin 12P to be threaded to for instance a large motor or another tool that forms the next lowermost component in a BHA. Thus, thebit box 10 in accordance with the present invention provides the possibility of protecting thedrill bit 12 in a safe manner without requiring a breaker plate nor a conventional drill bit cage whilst thedrill bit 12 is connected to the rest of the BHA. - The
bit box 10 is preferably formed from a lightweight but strong material such as a plastics material and a preferred plastics material is polypropylene. Thebit box 10 being formed from plastics material provides several advantages including relatively lightweight but also provides the big advantage that it can be drilled out of the borehole by the drill bit if thebit box 10 is accidentally dropped down the borehole whilst being removed from the drill bit and thus provides embodiments of the present invention with a further advantage over the prior art substantially metal drill bit box cages which could not be drilled out if portions of them were accidentally dropped down the borehole. - The
bit box 10 as shown inFIG. 1( a)-1(d) further comprises longitudinally extending indents or grooves in the outer surface to provide strength and support to thebit box 10. However,such indents 28 are not essential. - The
bit box 10 can be provided in four sizes to fit the vast majority of drill bit sizes and these are follows:— -
Design and suitable Length of bit Inner Diameter Diameter of drill bit sizes box C of bit box B aperture A Design 1-suitable for 45 cm 51 cm 25 cm 12¼″ to 17½″ OD drill bits Design 2-suitable for 65 cm 38 cm 22 cm 8½″ to 12¼″ OD drill bits Design 3-suitable for 45 cm 28 cm 17 cm 6⅛″ to 8½″ OD drill bits Design 4-suitable for 45 cm 22 cm 13 cm 2⅞″ to 6″ OD drill bits -
FIG. 3( a) shows another embodiment of a bit box 100 which is similar in many respects to thefirst embodiment 10 and has the same sizes of length and diameter as design 1. The embodiment ofbit box 200 as shown inFIG. 4( a) is most similar to the embodiment 100 shown inFIG. 3( a) except that the embodiment ofbit box 200 ofFIG. 4( a) has the same length C, outer diameter B and aperture diameter A as design 2. Moreover, the embodiment ofbit box 300 shown inFIG. 5( a) is most similar to the embodiment 100 shown inFIG. 3( a) except that the embodiment ofbit box 300 ofFIG. 5( a) has the same length C, outer diameter B and aperture diameter A as design 3. Furthermore, the embodiment ofbit box 400 shown inFIG. 6( a) is most similar to the embodiment 100 shown inFIG. 3( a) except that the embodiment ofbit box 400 ofFIG. 6( a) has the same length C, outer diameter B and aperture diameter A as design 4. - The embodiments of
bit boxes bit boxes bit 12, rest of BHA (not shown) andbit boxes bit boxes bit 12 just before the made up BHA is run into the borehole. Furthermore, if thebit box bit 12, it can be easily drilled out because it is preferably formed of drillable materials, which is preferably plastic. Furthermore, no heavy breaker plate is required to be used offshore to hold the bit steady in the rotary table whilst the rest of the BHA is made up onto thebit 12. - Preferably, a snare or tether loop formed from a wire (not shown) is provided to provide a backup means of attaching the
bit box bit 10 in order to further reduce the chances of dropping thebit box halves bit box 10 from enveloping thebit 10, the snare or tether still connects thebit box 10 to the drill string/rest of BHA until it is also disconnected from the drill string/rest of BHA. - Furthermore, the
hinge 18 and/orlocking mechanism 20 can be modified and a preferred alternative embodiment of bit box comprises one or more elongate flexible straps (not shown) such as nylon or other suitable flexible rope type straps to instead form thehinge 18 and/orlocking mechanism 20. In such an alternative but preferred embodiment, one or more (and two are preferred) flexible straps are embedded within thesemi-circular halves semi-circular halves semi-circular halves semi-circular halves bit 12, the approximate mid-point of the strap(s) form thehinge 18 and the two ends of each strap project out of the opposingedges semi-circular halves bit 12. This also aids an operator to release thelocking mechanism 20 when the time comes to remove thebit box 10 from thebit 12. Most preferably, there are two or three straps equispaced along the longitudinal axis of thebit box 10 and which are located just under the outer surface and extend around the circumference of thesemi-circular halves semi-circular halves bit box 10 such that the plastics or other suitable material of the twosemi-circular halves semi-circular halves -
FIGS. 7( a) to 7(g) show a further embodiment ofbit box 700 similar to that described above in which thehinge 18 is formed by the straps. In this embodiment achannel 750 and more preferably two channels is/are formed through the two halves of thebit box 700 to receive the straps. The position of the channel(s) may be marked on the bit box during manufacture/moulding and then formed by a routing procedure to remove the necessary material to provide a pathway for the strap(s) close to the surface of the bit box. The strap(s) is/are then fed through the channel(s) such that the approximate mid-point of the strap(s) form/forms the hinge. The strap(s) may be secured in position within the channel(s) by forcing an adhesive or foam or other setting material into the channel(s) such that the material sets within the channel(s) to prevent the strap(s) from being pulled out of the channel(s). The channel(s) are shown on one size only of bit box but could be incorporated into any of the embodiments described herein. - A
recess 760 is provided in the side of each half of the bit box. The recess may be formed during manufacture/moulding and provides a hand hold for ease of carrying the bit box. Thebit boxes - Furthermore, the
bit boxes bit box 10. Consequently, the upper central aperture allows the threaded pin or uppermost tubular portion of the downhole tool to project therethrough whilst the uppermost shoulder portion extends over and around the upper shoulder portion of the valuable and/or fragile portion of the downhole tool and thus the upper and lower shoulder portions of the downhole tool protector ensure that the downhole tool protector cannot be pulled off the downhole tool as long as the locking mechanism remains locked. Nevertheless, the upper and lower apertures allow the respective upper and lower connections of the downhole tool to project therethrough and thus allow the upper and lower connections to be inserted into the BHA or rest of drill string. - Further modifications and improvements may be made to the embodiments hereinbefore described without departing from the scope of the invention. For instance, the bit boxes and downhole tool protectors hereinbefore described could be formed from suitable other materials such as any one of or a combination of fibre glass, Kevlar™, carbon fibre, polyurethane or any other suitable material having the protective properties of relatively lightweight, strong, durable and preferably also being drillable in the unlikely event that they are dropped downhole.
Claims (27)
1. An oil, gas or water borehole drill bit protector apparatus comprising:—
one or more protector portions adapted to be placed around and/or adapted to envelope at least a drilling portion of the drill bit; and
the one or more protector portions comprising an aperture through which a connection portion of the drill bit projects in use.
2. A protector apparatus for protecting an oil, gas or water borehole downhole tool having connections at each end, the protector apparatus comprising:—
one or more protector portions adapted to be placed around and/or adapted to envelope at least a middle portion of the downhole tool; and
the one or more protector portions comprising an aperture at each end through which a respective end connection portion of the downhole tool projects in use.
3. A protector apparatus according to claim 1 , wherein the apparatus comprises two portions.
4. A protector apparatus according to claim 3 , wherein the portions are semi-circular in internal cross section and when closed around a drill bit or downhole tool provide a generally circular internal diameter.
5. A protector apparatus according to claim 3 , wherein the two portions are coupled together by a hinge mechanism.
6. A protector apparatus according to claim 5 , wherein the hinge mechanism is integrally formed with the two portions.
7. A protector apparatus according to claim 5 , wherein the hinge mechanism is formed by a separate hinge member such that the hinge member connects the two portions.
8. A protector apparatus according to claim 5 , wherein the two portions comprise respective longitudinal axes with the hinge mechanism being provided along one longitudinal edge of the respective two portions.
9. A protector apparatus according to claim 3 , wherein the protector apparatus further comprises a locking mechanism to lock the two portions together.
10. A protector apparatus according to claim 9 , wherein the locking mechanism is provided at, on or along the other longitudinal edge of the respective two portions
11. A protector apparatus according to claim 10 , wherein the locking mechanism is formed on the opposite longitudinal edge of the two portions from the hinge mechanism.
12. A protector apparatus according to claim 5 , wherein the hinge member and/or the locking mechanism are provided by one or more straps.
13. A protector apparatus according to claim 12 , wherein the one or more straps are embedded within the two portions such that a middle portion of the one or more straps forms the hinge member and the ends of the one or more straps can be connected together to form the locking mechanism.
14. A protector apparatus according to claim 3 , wherein the two portions of the protector apparatus when brought together provide a generally cylindrical inner bore having a closed lowermost in use end and an in use upper most end having a means to prevent movement occurring between the protector apparatus and the drill bit.
15. A protector apparatus according to claim 14 , wherein the in use uppermost end further comprises the aperture through which the connection portion of the drill bit projects in use.
16. A protector apparatus according to claim 15 , wherein the means to prevent movement occurring comprise shoulder portions adapted to abut with a portion of the drill bit.
17. A protector apparatus according to claim 2 , wherein the apparatus comprises two portions and wherein the two portions of the protector apparatus when brought together provide a generally cylindrical inner bore having an aperture provided at each of the uppermost and lower most in use ends and further comprising a means to prevent movement occurring between the protector apparatus and the downhole tool.
18. A protector apparatus according to claim 17 , wherein the uppermost connection portion of the downhole tool projects in use through the uppermost aperture of the protector apparatus and the lowermost connection portion of the downhole tool projects in use through the lowermost aperture of the protector apparatus of the second aspect.
19. A protector apparatus according to claim 17 , wherein the means to prevent movement occurring comprise shoulder portions adapted to abut with a portion of the downhole tool.
20. A protector apparatus according to claim 1 , wherein a gap or annulus between the outer surface of the drilling portion of the drill bit or downhole tool and the inner bore of the protector apparatus is filled by a packing material.
21. A protector apparatus according to claim 20 , wherein said packing material is selected from the list comprising foam, rubber, neoprene, injected foam, sponge foam, an inflatable member, air bags, or fluid filled bags.
22-23. (canceled)
24. A method of protecting a drill bit comprising:—
providing a protector apparatus according to claim 1 ;
placing the one or more protector portions around and/or enveloping the drilling portion of the drill bit; and
closing the protector portions around the drilling portion of the drill bit such that the connection portion of the drill bit projects through the aperture of the one or more protector portions.
25. A method of protecting an oil, gas or water borehole downhole tool having connections at each end, the method comprising:—
providing a protector apparatus according to claim 2 ;
placing the one or more protector portions around and/or enveloping the middle portion of the downhole tool; and
closing the protector portions around the middle portion of the downhole tool such that the pair of connection portion of the downhole tool project through the respective apertures of the one or more protector portions.
26-27. (canceled)
28. A method of transporting an oil gas or water borehole drill bit to a drilling rig comprising the steps of:—
a) providing a protector apparatus according to claim 1 ;
b) making up a connection between the drill bit and a motor or other portion of a BHA;
c) placing the protector apparatus around the drill bit either before step b) or after step b) and performing the method of protecting the drill bit according to the first aspect of the present invention; and
d) transporting the drill bit and motor or other portion of BHA made up together and the protector apparatus to the drilling rig.
29. (canceled)
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0815939.4 | 2008-09-02 | ||
GB0815939A GB0815939D0 (en) | 2008-09-02 | 2008-09-02 | Drill bit protector apparatus and method |
GB0905782.9 | 2009-04-03 | ||
GB0905782A GB0905782D0 (en) | 2009-04-03 | 2009-04-03 | Downhole tool protector apparatus & method |
PCT/GB2009/051033 WO2010026404A1 (en) | 2008-09-02 | 2009-08-19 | Downhole tool protector apparatus and method |
Publications (1)
Publication Number | Publication Date |
---|---|
US20110206492A1 true US20110206492A1 (en) | 2011-08-25 |
Family
ID=41412461
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/061,851 Abandoned US20110206492A1 (en) | 2008-09-02 | 2009-08-19 | Downhole tool protector apparatus and method |
Country Status (3)
Country | Link |
---|---|
US (1) | US20110206492A1 (en) |
EP (1) | EP2350422B8 (en) |
WO (1) | WO2010026404A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140124192A1 (en) * | 2012-11-07 | 2014-05-08 | Dustin Lynn Robinson | Protective covering for bottom hole assembly of drilling rig |
US20150110586A1 (en) * | 2013-10-23 | 2015-04-23 | Applied Materials, Inc. | Universal component lift apparatus, assemblies, and methods for electronic device manufacturing |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2435868A (en) * | 1940-03-09 | 1948-02-10 | Frank C Boyd | Drill pipe protector applicator |
US3788407A (en) * | 1972-10-17 | 1974-01-29 | Noble Drilling Corp | Method and arrangement for protecting and guiding drilling bits |
US4233469A (en) * | 1979-02-13 | 1980-11-11 | Steppe Theodore W | Conduit bushing |
US4253533A (en) * | 1979-11-05 | 1981-03-03 | Smith International, Inc. | Variable wear pad for crossflow drag bit |
US4385695A (en) * | 1981-07-01 | 1983-05-31 | Champlin Bruce E | Packaging block for cylindrical articles |
US4484785A (en) * | 1981-04-27 | 1984-11-27 | Sperry-Sun, Inc. | Tubing protector |
US4733789A (en) * | 1986-10-24 | 1988-03-29 | Olson Gerald W | Shipping container |
US20040099690A1 (en) * | 2002-11-25 | 2004-05-27 | Shawn Elliott | Apparatus and methods of removing elastomer from a container |
US7100641B2 (en) * | 2002-05-15 | 2006-09-05 | Crp Group Limited | Protective ducting |
US7318492B2 (en) * | 2004-08-18 | 2008-01-15 | Reedhycalog Uk Ltd | Rotary drill bit |
WO2008011679A1 (en) * | 2006-07-26 | 2008-01-31 | Itac Express Pty. Ltd. | Modular packaging for elongated drill tools |
US20080264815A1 (en) * | 2006-07-27 | 2008-10-30 | Boyt Harness Company, L.L.C. | Weaponry container having a rigid outer surface |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2686472A (en) * | 1948-12-30 | 1954-08-17 | Howard B Burns | Torpedo shell for shooting wells |
DE870388C (en) * | 1951-08-17 | 1953-03-12 | Hardmetall As | Protection and designation arrangement for rock drill |
GB9604244D0 (en) * | 1996-02-28 | 1996-05-01 | Munro David | Clamp |
-
2009
- 2009-08-19 EP EP09785499.6A patent/EP2350422B8/en active Active
- 2009-08-19 US US13/061,851 patent/US20110206492A1/en not_active Abandoned
- 2009-08-19 WO PCT/GB2009/051033 patent/WO2010026404A1/en active Application Filing
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2435868A (en) * | 1940-03-09 | 1948-02-10 | Frank C Boyd | Drill pipe protector applicator |
US3788407A (en) * | 1972-10-17 | 1974-01-29 | Noble Drilling Corp | Method and arrangement for protecting and guiding drilling bits |
US4233469A (en) * | 1979-02-13 | 1980-11-11 | Steppe Theodore W | Conduit bushing |
US4253533A (en) * | 1979-11-05 | 1981-03-03 | Smith International, Inc. | Variable wear pad for crossflow drag bit |
US4484785A (en) * | 1981-04-27 | 1984-11-27 | Sperry-Sun, Inc. | Tubing protector |
US4385695A (en) * | 1981-07-01 | 1983-05-31 | Champlin Bruce E | Packaging block for cylindrical articles |
US4733789A (en) * | 1986-10-24 | 1988-03-29 | Olson Gerald W | Shipping container |
US7100641B2 (en) * | 2002-05-15 | 2006-09-05 | Crp Group Limited | Protective ducting |
US20040099690A1 (en) * | 2002-11-25 | 2004-05-27 | Shawn Elliott | Apparatus and methods of removing elastomer from a container |
US7318492B2 (en) * | 2004-08-18 | 2008-01-15 | Reedhycalog Uk Ltd | Rotary drill bit |
WO2008011679A1 (en) * | 2006-07-26 | 2008-01-31 | Itac Express Pty. Ltd. | Modular packaging for elongated drill tools |
US20080264815A1 (en) * | 2006-07-27 | 2008-10-30 | Boyt Harness Company, L.L.C. | Weaponry container having a rigid outer surface |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140124192A1 (en) * | 2012-11-07 | 2014-05-08 | Dustin Lynn Robinson | Protective covering for bottom hole assembly of drilling rig |
US20150110586A1 (en) * | 2013-10-23 | 2015-04-23 | Applied Materials, Inc. | Universal component lift apparatus, assemblies, and methods for electronic device manufacturing |
US10071887B2 (en) * | 2013-10-23 | 2018-09-11 | Applied Materials, Inc. | Universal component lift apparatus, assemblies, and methods for electronic device manufacturing |
Also Published As
Publication number | Publication date |
---|---|
EP2350422B8 (en) | 2017-05-17 |
WO2010026404A1 (en) | 2010-03-11 |
EP2350422B1 (en) | 2017-03-15 |
EP2350422A1 (en) | 2011-08-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: TITAN TORQUE SERVICES LIMITED, UNITED KINGDOM Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:GASKIN, KEITH SCOTT;REEL/FRAME:026234/0642 Effective date: 20110426 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |