CN103541666B - A kind of hydraulic variable-diameter centralizer - Google Patents
A kind of hydraulic variable-diameter centralizer Download PDFInfo
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- CN103541666B CN103541666B CN201310581225.6A CN201310581225A CN103541666B CN 103541666 B CN103541666 B CN 103541666B CN 201310581225 A CN201310581225 A CN 201310581225A CN 103541666 B CN103541666 B CN 103541666B
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Abstract
The present invention relates to a kind of hydraulic variable-diameter centralizer used for conventional gas and oil drilling well and the drilling well of solid mineral reserve.It is large that it solves down-hole reducing centralizer tripping force, the problem that installing space is short.Its technical scheme is: slide block embeds inner central tube annular groove through lower shell groove, exterior central tube is inserted in drum body, exterior central tube outer projection spline embeds drum body helical groove, spring c is inserted in exterior central tube outside, upper shell and lower shell screwed connection, spring b is inserted in upper shell outside, sliding sleeve is inserted in upper shell, the triangular prism cylinder of righting arm a and sliding sleeve is hinged, the triangular prism cylinder of righting arm b and lower shell is hinged, righting arm a and righting arm b is hinged, locking cylinder puts into upper shell through hole, spring a puts into locking cylinder inside, pressing plate and upper shell screw a fix.The circumference that the axially-movable of inner central tube and exterior central tube is converted into drum body by the present invention is rotated, and changes the end thrust that hydraulic pressure produces into circumferential uprighting force, and support reliable, installing space is large.
Description
Technical field
The present invention relates to a kind of hydraulic variable-diameter centralizer for Oil/gas Well underreamer and deep formation mineral mining.
Background technology
In order to controlling and adjustment well hole deviation in drilling process, centralizer can be used in a large number, the centralizer of current use is mainly divided into rigid centralizer and elastic centralizer, rigid centralizer support force is large, but shape is fixed, and cannot be applicable to irregular wellbore, elastic centralizer is mainly according to the principle design of spring, there is higher reset force, but under enter in process to produce great axial rub resistance, support force is also not as good as rigid centralizer.Also there is now part can the reducing centralizer that starts of down-hole, but at the larger well section of hole deviation and net horizontal section usually because tripping force is excessive, the weight of sufficient length drill string cannot be supported, and in comparatively stub boring intercolumniation, centralizer is frequently installed, increase drilling cost.
In drilling process, should try one's best and control well track accurately and effectively, improve rate of penetration, reduce axial rub resistance, reduce drilling cost.Centralizer, as the key tool of drilling process, should meet the technical requirements of complex drilling condition as far as possible, reduces financial cost, and the centralizer used at present all has certain limitation.
Summary of the invention
The object of the invention is: large in order to solve down-hole reducing centralizer tripping force in drilling process, the problem that installing space is short, spy provides a kind of hydraulic variable-diameter centralizer.Control reducing scope by pump pressure, have a grade reducing, tripping force is little, and support force is large.
In order to achieve the above object, the present invention is by the following technical solutions: a kind of hydraulic diameter-variable stabilizer, comprises upper shell, screw a, pressing plate, spring a, locking cylinder, pin a, righting arm a, sliding sleeve, spring b, water nozzle, baffle ring, spring c, pin b, spacer ring, thrust bearing a, screw b, slide block, inner central tube, drum body, exterior central tube, thrust bearing b, righting arm b, pin c, lower shell, its architectural feature is: upper shell upper end is provided with standard screw thread and is connected with upper drilling string, bottom is provided with standard screw thread and is connected with lower shell, upper shell radial direction processing three through holes, through hole medial end has a step, three through holes are at circumferencial direction all in 120 ° of distributions, and upper shell is processing three grooves axially, three grooves at circumferencial direction all in 120 ° of distributions, three grooves are each passed through three through hole outboard end, and recess width is the half of through-hole diameter, locking cylinder is a cylinder, and one end is closed, and other end end face gradient is 20 ~ 30 °, a processing groove in the middle of end face, and recess width equals upper shell recess width, and groove depth capacity is twice upper shell depth of groove, three locking cylinders put into upper shell three through holes, and the contact surface of locking cylinder and upper shell through hole adopts sealing ring to seal, and three spring a are installed on three locking cylinder inner chambers respectively, and during installation, spring a is in compressive state, three pressing plates are arranged in upper shell three grooves respectively, and pressing plate screw a is fixedly connected with upper shell groove, lower shell bottom is provided with one section of equilateral triangular prism, and thrust bearing b is arranged on the equilateral triangular prism upper surface of lower shell, drum body inside is processed with three helical grooves, and three helical grooves are at circumferencial direction all in 120 ° of distributions, and drum body outer upper ends has three distinguish, three distinguish at circumferencial direction all in 120 ° of distributions, similar ratchet structure, drum body is inserted in lower shell, and lower surface contacts with thrust bearing b, there are three projecting splines exterior central tube lower end, and three splines are at circumferencial direction all in 120 ° of distributions, and projecting splines is identical with drum body helical groove helical angle, and exterior central tube is inserted in lower shell, and exterior central tube outer projection spline embeds drum body internal helicoid groove, be axially arranged with three grooves in the middle part of lower shell and be communicated with lower shell interior or exterior space, three grooves at circumferencial direction all in 120 ° of distributions, water nozzle and inner central tube screwed connection, inner central tube external process has a ring annular groove, inner central tube is positioned over lower shell inner chamber, three slide blocks are each passed through lower shell three grooves and embed in inner central tube annular groove, exterior central tube screw b is fixedly connected with three slide blocks respectively, thrust bearing a is inserted in exterior central tube, and contact with drum body upper surface, spacer ring is inserted in exterior central tube, and contact with thrust bearing a, spring c is arranged on spacer ring, during installation, spring c is in compressive state, baffle ring and the screwed connection of exterior central tube top, spring b is installed on the step of upper shell bottom, and during installation, spring b is in compressive state, sliding sleeve is inserted in upper shell, multistage sawtooth button is had inside sliding sleeve upper end, sliding sleeve lower end external process is equilateral triangular prism, righting arm a pin a is articulated with on equilateral triangular prism one cylinder of sliding sleeve bottom, lower shell bottom has standard screw thread to be connected with lower drilling string, lower shell bottom has one section for equilateral triangular prism, and righting arm b pin c is articulated with on equilateral triangular prism one cylinder of lower shell bottom, and righting arm a and righting arm b pin b is hinged.
The invention has the beneficial effects as follows: (1) this centralizer tripping force is little, drum body internal helicoid groove coil angle is very little, axial liquid pressure can be enlarged into great peripheral force, supports righting rod and props up; (2) under enter in process, righting arm regain, axial rub resistance can not be produced; (3) can lock after reducing, support force is very large; (4) righting arm all effectively can avoid the problem blocked by landwaste in the process strutting and regain; (5) this centralizer hydraulic coupling drives conveniently, and frame for movement is simple and reliable, in conventional gas and oil drilling well and solid mineral reserve drillng operation.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of hydraulic variable-diameter centralizer righting arm of the present invention when strutting;
Fig. 2 is the structural representation of a kind of hydraulic variable-diameter centralizer righting arm of the present invention when regaining;
Fig. 3 is Figure 1A-A cross-sectional view;
Fig. 4 is Fig. 2 B-B cross-sectional view;
In figure: 1. upper shell, 2. screw a, 3. pressing plate, 4. spring a, 5. locking cylinder, 6. pin a, 7. righting arm a, 8. sliding sleeve, 9. spring b, 10. water nozzle, 11. baffle rings, 12. spring c, 13. pin b, 14. spacer rings, 15. thrust bearing a, 16. screw b, 17. slide blocks, 18 inner central tubes, 19. drum body, 20. exterior central tubes, 21. thrust bearing b, 22. righting arm b, 23. pin c, 24. lower shells.
Detailed description of the invention
As depicted in figs. 1 and 2, a kind of hydraulic variable-diameter centralizer of the present invention comprises upper shell 1, screw a2, pressing plate 3, spring a4, locking cylinder 5, pin a6, righting arm a7, sliding sleeve 8, spring b9, water nozzle 10, baffle ring 11, spring c12, pin b13, spacer ring 14, thrust bearing a15, screw b16, slide block 17, inner central tube 18, drum body 19, exterior central tube 20, thrust bearing b21, righting arm b22, pin c23, lower shell 24, upper shell 1 upper end is provided with standard screw thread and is connected with upper drilling string, bottom is provided with standard screw thread and is connected with lower shell 24, upper shell 1 radial direction processing three through holes, through hole medial end has a step, three through holes are at circumferencial direction all in 120 ° of distributions, and upper shell 1 is processing three grooves axially, three grooves at circumferencial direction all in 120 ° of distributions, three grooves are each passed through three through hole outboard end, and recess width is the half of through-hole diameter, locking cylinder 5 is a cylinder, one end is closed, other end end face gradient is 20 ~ 30 °, a processing groove in the middle of end face, and recess width equals upper shell 1 recess width, groove depth capacity is twice upper shell 1 depth of groove, three locking cylinders 5 put into upper shell 1 three through holes, and locking cylinder 5 adopts sealing ring to seal with the contact surface of upper shell 1 through hole, and three spring a4 are installed on three locking cylinder 5 inner chambers respectively, during installation, spring a4 is in compressive state, three pressing plates 3 are arranged in upper shell 1 three grooves respectively, and pressing plate 3 screw a2 is fixedly connected with upper shell 1 groove, lower shell 24 bottom is provided with one section for equilateral triangular prism, thrust bearing b21 is arranged on the equilateral triangular prism upper surface of lower shell 24, drum body 19 inside is processed with three helical grooves, three helical grooves at circumferencial direction all in 120 ° of distributions, drum body 19 outer upper ends has three distinguish, three distinguish at circumferencial direction all in 120 ° of distributions, similar ratchet structure, drum body 19 is inserted in lower shell 24, lower surface contacts with thrust bearing b21, there are three projecting splines exterior central tube 20 lower end, three splines at circumferencial direction all in 120 ° of distributions, projecting splines is identical with drum body 19 helical groove helical angle, exterior central tube 20 is inserted in lower shell 24, exterior central tube 20 outer projection spline embeds in drum body 19 internal helicoid groove, be processed with three grooves in the middle part of lower shell 24 and be communicated with lower shell 24 interior or exterior space, three grooves at circumferencial direction all in 120 ° of distributions, water nozzle 10 and inner central tube 18 screwed connection, inner central tube 18 external process has a ring annular groove, inner central tube 18 is positioned over lower shell 24 inner chamber, three slide blocks 17 are each passed through lower shell 24 3 grooves and embed inner central tube 18 annular groove, exterior central tube 20 is connected with three slide blocks 17 respectively by screw b16, thrust bearing a15 is inserted in exterior central tube 20, and contact with drum body 19 upper surface, spacer ring 14 is inserted in exterior central tube 20, and contact with thrust bearing a15, spring c12 is arranged on spacer ring 14, during installation, spring c12 is in compressive state, baffle ring 11 and exterior central tube 20 top screwed connection, spring b9 is installed on the step of upper shell 1 bottom, and during installation, spring b9 is in compressive state, sliding sleeve 8 is inserted in upper shell 1, multistage sawtooth button is had inside sliding sleeve 8 upper end, outside, lower end is equilateral triangular prism, righting arm a7 pin a6 is articulated with on equilateral triangular prism one cylinder of sliding sleeve 8 bottom, lower shell 24 bottom has standard screw thread to be connected with lower drilling string, lower shell 24 bottom has one section for equilateral triangular prism, and righting arm b22 pin c23 is articulated with on equilateral triangular prism one cylinder of lower shell 24 bottom, and righting arm a7 and righting arm b22 pin b13 is hinged.
As shown in Figure 3 and Figure 4, righting arm b22 is articulated with on the cylinder of the equilateral triangular prism part of lower shell 24, three righting arm b22 at circumferencial direction all in 120 ° of distributions, drum body 19 inside is processed with three helical grooves, three helical grooves at circumferencial direction all in 120 ° of distributions, drum body 19 outer upper ends has three distinguish, three distinguish at circumferencial direction all in 120 ° of distributions, similar ratchet structure, there are three projecting splines exterior central tube 20 outside, three splines at circumferencial direction all in 120 ° of distributions, projecting splines is identical with drum body 19 helical groove helical angle, exterior central tube 20 is inserted in lower shell 24, exterior central tube 20 outer projection spline embeds drum body 19 internal helicoid groove.
The operating principle of a kind of hydraulic variable-diameter centralizer of the present invention is: change the inner drilling liquid pressure of drill string by controlling pump pressure, when the inner drilling liquid pressure of drill string raises, produce thrust to water nozzle 10 to increase, water nozzle 10, inner central tube 18, screw b16, slide block 17, exterior central tube 20 and baffle ring 11 entirety move downward, Compress Spring c12, exterior central tube 20 axially-movable, drum body 19 circumference is rotated, the helical angle of drum body 19 internal helicoid groove is very little, the end thrust of exterior central tube 20 axially-movable generation is enlarged into the rotatory force of drum body 19 circumferential movement, drum body 19 is rotated, strut righting arm b22, righting arm b22 pulls righting arm a7 to strut simultaneously, sliding sleeve 8 moves axially downwards, Compress Spring b9, when sliding sleeve 8 sawtooth button moves to locking cylinder 5 position, locking cylinder 5 is Compress Spring a4 under the inner drilling liquid pressure of drill string, locking cylinder 5 extends radially out, enter in sliding sleeve 8 sawtooth button locked, drilling liquid pressure continues to raise, repeat above-mentioned action, righting arm b22 struts diameter and becomes large further, sliding sleeve 8 moves downward displacement to be increased, it is dead that locking cylinder 5 enters sliding sleeve 8 next stage sawtooth padlock, drilling liquid pressure can be reduced after locked, under spring c12 effect, water nozzle 10, inner central tube 18, screw b16, slide block 17, exterior central tube 20 and baffle ring 11 entirety move upward, drum body 19 goes back to initial position, locking cylinder 5 in low drilling liquid pressure situation still by locked for sliding sleeve 8, a kind of hydraulic variable-diameter centralizer keeps large reducing state, reduce drilling liquid pressure to threshold, locking cylinder 5 is under spring a4 effect, get back to initial position, sliding sleeve 8 unlocks, under spring b9 effect, sliding sleeve 8 moves upward, and righting arm a7 and righting arm b22 regains initial position.
Claims (5)
1. a hydraulic variable-diameter centralizer, by upper shell (1), screw a (2), pressing plate (3), spring a (4), locking cylinder (5), pin a (6), righting arm a (7), sliding sleeve (8), spring b (9), water nozzle (10), baffle ring (11), spring c (12), pin b (13), spacer ring (14), thrust bearing a (15), screw b (16), slide block (17), inner central tube (18), drum body (19), exterior central tube (20), thrust bearing b (21), righting arm b (22), pin c (23), lower shell (24) forms, it is characterized in that: upper shell (1) upper end is provided with standard screw thread and is connected with upper drilling string, bottom is provided with standard screw thread and is connected with lower shell (24), upper shell (1) radial direction processing three through holes, upper shell (1) is processing three grooves axially, three locking cylinders (5) put into upper shell (1) three through hole, locking cylinder (5) adopts sealing ring to seal with the contact surface of upper shell (1) through hole, three spring a (4) are installed on three locking cylinder (5) inner chambers respectively, during installation, spring a (4) is in compressive state, three pressing plates (3) are arranged in upper shell (1) three groove respectively, and pressing plate (3) screw a (2) is fixedly connected with upper shell (1) groove, lower shell (24) bottom arranges one section of equilateral triangular prism, and thrust bearing b (21) is arranged on the equilateral triangular prism upper surface of lower shell (24), drum body (19) inside is provided with three helical grooves, and outer upper ends is provided with three distinguish, and drum body (19) is inserted in lower shell (24), and its lower surface contacts with thrust bearing b (21), there are three projecting splines exterior central tube (20) lower end, and exterior central tube (20) is inserted in lower shell (24), and exterior central tube (20) outer projection spline embeds in drum body (19) internal helicoid groove, lower shell (24) middle part is axially provided with three grooves, three groove circumferencial directions be 120 ° uniform, inner central tube (18) external process has a ring annular groove, inner central tube (18) is positioned over lower shell (24) inner chamber, three slide blocks (17) are each passed through lower shell (24) three grooves and embed in inner central tube (18) annular groove, and exterior central tube (20) screw b (16) is fixedly connected with three slide blocks (17) respectively, water nozzle (10) and inner central tube (18) screwed connection, thrust bearing a (15) is inserted in exterior central tube (20) and contacts with drum body (19) upper surface, spacer ring (14) is inserted in exterior central tube (20) and contacts with thrust bearing a (15), spring c (12) is arranged on spacer ring (14) in compressive state, baffle ring (11) and exterior central tube (20) top screwed connection, spring b (9) is arranged on the step of upper shell (1) bottom in compressive state, sliding sleeve (8) is inserted in upper shell (1), and righting arm a (7) pin a (6) is articulated with on a cylinder of the equilateral triangular prism in sliding sleeve (8) bottom, lower shell (24) bottom and lower drilling string screwed connection, lower shell (24) bottom has one section for equilateral triangular prism, righting arm b (22) pin c (23) is articulated with on equilateral triangular prism one cylinder of lower shell (24) bottom, and righting arm a (7) is hinged with pin b (13) with righting arm b (22).
2. hydraulic variable-diameter centralizer according to claim 1, it is characterized in that: radial three the through hole medial ends of described upper shell (1) have a step, three through holes are 120 ° of distributions at circumferencial direction, upper shell (1) axially three grooves is 120 ° of distributions at circumferencial direction, three grooves are each passed through three through hole outboard end, and recess width is the half of through-hole diameter.
3. hydraulic variable-diameter centralizer according to claim 1, it is characterized in that: described locking cylinder (5) is a cylinder, one end is closed, other end end face gradient is 20 ~ 30 °, a processing groove in the middle of end face, recess width equals upper shell (1) recess width, and groove depth capacity equals twice upper shell (1) depth of groove.
4. hydraulic variable-diameter centralizer according to claim 1, it is characterized in that: described drum body (19) inside is provided with three helical grooves, three helical grooves are at circumferencial direction all in 120 ° of distributions, and drum body (19) outer upper ends three distinguish are 120 ° of distributions at circumferencial direction; Exterior central tube (20) lower end is provided with three projecting splines, and three splines are 120 ° of distributions at circumferencial direction, and projecting splines is identical with drum body (19) helical groove helical angle.
5. hydraulic variable-diameter centralizer according to claim 1, is characterized in that: described sliding sleeve (8) upper inner is provided with multistage sawtooth button, and sliding sleeve (8) lower end external process is equilateral triangular prism.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310581225.6A CN103541666B (en) | 2013-11-19 | 2013-11-19 | A kind of hydraulic variable-diameter centralizer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310581225.6A CN103541666B (en) | 2013-11-19 | 2013-11-19 | A kind of hydraulic variable-diameter centralizer |
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| CN103541666A CN103541666A (en) | 2014-01-29 |
| CN103541666B true CN103541666B (en) | 2015-08-05 |
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