CN103046883A - Continuous cyclic drilling process applicable to air drilling - Google Patents
Continuous cyclic drilling process applicable to air drilling Download PDFInfo
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- CN103046883A CN103046883A CN2012105613900A CN201210561390A CN103046883A CN 103046883 A CN103046883 A CN 103046883A CN 2012105613900 A CN2012105613900 A CN 2012105613900A CN 201210561390 A CN201210561390 A CN 201210561390A CN 103046883 A CN103046883 A CN 103046883A
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Abstract
The invention discloses a continuous cyclic drilling process applicable to air drilling. The process includes the steps: a valve plate A (7) of a center check valve (2) is provided with a sealing portion A, a valve body A (6) is provided with a sealing match portion A, a valve plate B (12) of a lateral vertical check valve (3) is provided with a sealing portion B, and a valve body B (11) is provided with a sealing match portion B. During normal drilling operation, a pipeline A is connected with the center check valve (2) to supply air to a drill stem; and when the drill stem needs to be demounted, a pipeline B is connected to the lateral vertical check valve (3) to supply air to the drill stem. The continuous cyclic drilling process applicable to air drilling has the advantages that equivalent cycling density of circulation air of a well can be effectively controlled, and stability in well pressure can be effectively maintained. Drilling time is shortened, and the continuous cyclic drilling process applicable to air drilling is significant to reduction of drilling cost.
Description
Technical field
The present invention relates to the petroleum drilling technology field, particularly a kind of continuous cyclic drilling technique that is applicable to air drilling.
Background technology
Oil drilling is described as the key of petroleum industry, has shown the key position of drilling well in petroleum industry.From exploration phase oil prospecting gas finding, to Development and Production oil gas, until the enforcement of oil gas field well stimulation all must realize through drilling well.Compare with the traditional water-base drilling fluid drilling well of use; with the gaseous fluid drilling well more advantage is arranged: can improve rate of penetration; reduce or avoid leakage; prolong bit life; reduce the down-hole complex accident, reduce the completion well stimulation, reduce the drilling well integrated cost; the protection layer of oil gas production increases oil and gas production etc.
But during the conventional gas drillng operation, before making up a joint, the essential booster pump of at first closing, stop gas circulation, the shaft bottom will produce the negative pressure excitement this moment, this very easily causes bottom pressure to be lower than pore pressure, and may cause the accidents such as cave-in and bury drills, can cause adverse effect to follow-up setting of casing well cementing operation simultaneously.When adjunction finishing drilling bar restarts circulation time, will cause that normal pressure is exciting, so that bottom pressure is higher than normal circulation pressure, even surpass formation fracture pressure, cause recyclegas leakage and differential sticking.Stop circulation time at drilling well gas, ground back pressure control method commonly used can only keep the stable of bottom pressure by pressure compensation mode, but can't avoid the change of annular pressure gradient, and in coastal waters and deepwater drilling, the stratum, seabed has special pore pressure and fracture pressure curve, so that keep the stabilization ratio of Open-Hole Section barometric gradient only to keep stablizing of bottom pressure even more important.Drilling well gas stops circulation time, the landwaste sedimentation, restart circulating, spending the plenty of time removes the landwaste of deposition, may cause kill-job and injure reservoir at the recovery circulation time, cause again long rig downtime to rebuild balance simultaneously, affect drilling efficiency.
Chinese patent 2011101301394 discloses a kind of oil drilling with uninterrupted continuous circulation short circuit and continuous circulation method for slurry thereof, and this uninterrupted continuous circulation short circuit comprises short circuit body, automatic center gate valve and the normally closed ball-and-seat of side direction; Automatic center gate valve and the coaxial setting of short circuit body; The normally closed ball-and-seat of side direction is arranged on the short circuit body sidewall of automatic center gate valve below.Owing to adopted the accessible automatic center gate valve of large latus rectum and the combined short circuit body construction of the normally closed ball-and-seat of triple formula side direction, on needs dismounting drilling rod, buckle, shackle and when making a trip, change from the uninterrupted circulating mud of the normally closed ball-and-seat of side direction, utilize the pressure automatic cut-off automatic center gate valve of circulating mud, thereby kept continuously the stable of borehole pressure.But this continuous circulation short circuit is only applicable to mud drilling, can not be applicable in the air drilling.
Summary of the invention
The object of the invention is to overcome the shortcoming of prior art, provide a kind of and can effectively control the equivalent circulating density of bore hole annulus, effectively keep the stable continuous cyclic drilling technique that is applicable to air drilling of borehole pressure.
Purpose of the present invention is achieved through the following technical solutions: a kind of continuous cyclic drilling technique that is applicable to air drilling, and it may further comprise the steps:
S1, spud in before, connect first supercharger to the supply air line of air supply controller, divide again two-way to be connected to the pipeline of continuous circulation short circuit from air supply controller, first via pipeline A, be connected to the center one way valve of continuous circulation short circuit by top driving device, the the second road pipeline B is arranged on by snap joint by the vertical one way valve of side direction of continuous circulation short circuit, and is for subsequent use;
Connection pin thread with the continuous circulation short circuit before S2, the lower brill is connected with the drilling rod box, drilling tool being connected to the top drives again, during normal drillng operation, the center one way valve of continuous circulation short circuit is in opening state, the vertical one way valve of side direction is in closed condition, connect the passage of pipeline A, gas is entered by pipeline A, realize the circulation of gas; Recyclegas enters drilling rod by pipeline A through the center of continuous circulation short circuit one way valve and realizes circulation;
S3, when the lower brill that makes up a joint, when drilling rod stops operating, driving continuation by pipeline A by the top keeps to continuous circulation short circuit center one way valve air feed, then pipeline B for subsequent use is connected on the vertical one way valve of side direction of continuous circulation short circuit, then, increase gradually gas pressure in the pipeline B, the valve plate B of the vertical one way valve of side direction is opened, recyclegas is entered the inside of continuous circulation short circuit by the vertical one way valve of side direction, reduce gradually again the pressure of gas in the pipeline A, when gas pressure in the pipeline A reduces to a certain degree the time, the center one way valve is autoshutdown under the High Pressure of side direction recyclegas, after the pipeline A release, unload being connected of drilling tool and continuous circulation short circuit, connect new drilling rod in the upper end of continuous circulation short circuit, then connect again a continuous circulation short circuit B in new drilling rod upper end, to be connected with the drilling tool that drives on the top is connected on the continuous circulation short circuit B that newly connects again, after installing, again open gradually pipeline A, center one way valve air feed to continuous circulation short circuit B, and increase gradually the pressure of gas in the pipeline A, the valve plate A of center one way valve opens, recyclegas enters rod string by the center one way valve, when strengthening gradually the gas pressure of pipeline A, reduce gradually the pressure of gas in the pipeline B, make the vertical closed check valve of side direction, after the pipeline B release, pipeline B and the vertical one way valve of side direction are disconnected, proceed drillng operation; Repeatedly implement aforesaid operations, until finish drillng operation;
S4, when pulling out of hole, drilling rod stops operating, driving continuation by pipeline A by the top keeps to continuous circulation short circuit center one way valve air feed, pipeline B is connected to the vertical one way valve of side direction of continuous circulation short circuit, and increase gradually the pressure of gas in the pipeline B, and reduce the gas pressure of pipeline A, the valve plate B of the vertical one way valve of side direction of this circulation short circuit is opened, recyclegas is entered the inside of continuous circulation short circuit by the vertical one way valve of side direction, when gas pressure in the pipeline A reduces to a certain degree the time, the center one way valve is autoshutdown under the High Pressure of side direction recyclegas, after the pipeline A release, unload the above drilling rod of continuous circulation short circuit that is in the rig floor table top, and by driving or tourist bus is placed on the drill string that unloads in the packing box on the top, and unload the continuous circulation short circuit that is installed in the drill string top;
S5, after finishing the dismounting in the 4th step, drilling tool is connected to again on the continuous circulation short circuit of rig floor table top, connect the center one way valve of pipeline A and continuous circulation short circuit, and increase gradually gas pressure in the pipeline A, the valve plate A of center one way valve opens, recyclegas enters the inside of continuous circulation short circuit by the center one way valve, then, reduces gradually gas pressure in the pipeline B, make the vertical closed check valve of side direction, after the pipeline B release, the vertical one way valve of pipeline B and side direction is disconnected, by driving or tourist bus is upwards carried drill string on the top, continue to implement the trip-out operation, when drill string plays next root circulation short circuit, repeat above-mentioned operation, just can finish whole trip-out constructions.
Among the described step S3, after pipeline B and the vertical one way valve disconnection of side direction, on the valve body of the vertical one way valve of side direction, valve seat, spool and relief valve are installed successively.
Among the described step S4, after drilling rod stopped operating, relief valve, spool and the valve seat installed on the valve body with the vertical one way valve of side direction of continuous circulation short circuit unloaded successively.
Among the described step S1, the valve plate A that also is included in the center one way valve is positioned at the step that sealing A is set on the part of annular sealing surface.
Among the described step S1, the valve A that also is included in the center one way valve is positioned at the step that the A of the section that is sealed and matched that matches with sealing A is set on the part of annular sealing surface.
Among the described step S1, the valve plate B that also is included in the vertical one way valve of side direction is positioned at the step that sealing B is set on the part of annular sealing surface.
Among the described step S1, also be included in the step that the B of the section that is sealed and matched that matches with sealing B is set on the part of valve B annular sealing surface.
The present invention has the following advantages:
The present invention is at needs dismounting drilling rod, upper button, the gas pressure of shackle and the gas pressure that drives by mutual adjusting top when making a trip and side direction circulation is controlled the equivalent circulating density of bore hole annulus, thereby kept continuously the stable of borehole pressure, the good result that has kept the stable of the borehole wall and well is cleaned, prevented from collapsing and the formation of lower curved section cutting bed, avoided striding the generation of the various complex situations such as card drain spray, thereby many complicated technology problems have been solved, the continuous drilling well of gas circulation can guarantee downhole safety, and shortened drilling time, be significant to reducing drilling cost; And the geological condition Holes of Complicated Wells played a key effect especially, because can effectively controlling the equivalent circulating density of bore hole annulus, thereby the well drilling well that makes some almost be difficult to operation is very smooth and normal, be suitable for the super deepwater drilling of deep water, extended reach well drilling, under balance pressure drilling, and be used for easily spraying the job execution that Absorption Wells and bottom presser sensor well etc. need the complicated technology well of controlled pressure drilling, and key effect is played in low pressure, volume increase hypotonic, water-sensitive strata.
The center one way valve of air drilling continuous circulation short circuit and the vertical one way valve of side direction all adopt multi-stage sealed mode, on the valve plate rubber layer is set simultaneously, further promoted sealing performance, the mud circulation drilling well is compared relatively simultaneously: its gas drilling well liquid column pressure decrease, bottom rock three-phase stress state changes, so that the shaft bottom efficiency of breaking rock is higher, also help to reduce " chip hold down ", be that drill bit continues the cutting new rock rather than rolls broken landwaste, thereby improved rate of penetration; Simultaneously gases at high pressure to the cooling effect of drill bit more, thereby the application life of having improved drill bit; The equivalent barometric gradient of gas drilling system is 0.001 ~ 0.90g/cm
3, low-density window orientation is very large, be easy to realize the underbalance operating mode at various stratomeres, so the air continuous cyclic drilling can reduce or avoid leakage; The gas circulation drilling well has realized under balance pressure drilling, does not have solid phase particles and liquid phase to enter the stratum, has reached the purpose of protection reservoir, thereby need in further well stimulation, also not reduce simultaneously the expense of relevant operation.
Tradition mud continuous circulation short circuit adopts hard sealing means, all substantially invalid to the hypobaric sealing of height, air drilling continuous circulation short circuit adopts multi-stage sealed mode with rubber layer is set, and its sealing effectiveness of valve plate of mud circulation is better relatively, has realized air-circulating drilling.
Description of drawings
Fig. 1 is continuous circulation short-circuit structure schematic diagram used in the present invention
Fig. 2 is the structural representation of the center one way valve of continuous circulation short circuit used in the present invention
Fig. 3 is the structural representation of the vertical one way valve of side direction of continuous circulation short circuit used in the present invention
Fig. 4 is the another kind of structural representation of the center one way valve of continuous circulation short circuit used in the present invention
Fig. 5 is the another kind of structural representation of the vertical one way valve of side direction of continuous circulation short circuit used in the present invention
Fig. 6 is the third structural representation of the center one way valve of continuous circulation short circuit used in the present invention
Fig. 7 is the third structural representation of the vertical one way valve of side direction of continuous circulation short circuit used in the present invention
Among the figure, 1-short circuit main body, 2-center one way valve, the vertical one way valve of 3-side direction, 4-connects pin thread, and 5-connects box, 6-valve A, 7-valve plate A, the 8-positioner, 9-gyroaxis A, 10-vestibule, 11-valve B, 12-valve plate B, 13-gyroaxis B, 14-torsion spring, the 15-centring ring, 16-jump ring, 17-locating ring, 18-annular projection A, 19-annular recess A, 20-annular projection B, 21-annular recess B, 22-annular recess C, 23-annular projection C, 24-annular recess D, 25-annular projection D, 26-taper surface A, 27-taper surface B, 28-taper surface C, 29-taper surface D, 30-spherical A, 31-spherical B, 32-spherical C, 33-spherical D, 34-rubber layer A, 35-rubber layer B, the 36-valve seat, 37-spool, 38-relief valve.
The specific embodiment
The present invention will be further described below in conjunction with accompanying drawing, and protection scope of the present invention is not limited to the following stated:
As shown in Figure 1, a kind of continuous circulation short circuit that is applicable to air drilling, it comprises short circuit main body 1, be arranged at the center one way valve 2 on short circuit main body 1 inner chamber top and be arranged at the vertical one way valve 3 of side direction on short circuit main body 1 sidewall, also be provided with the positioner 8 of compression center one way valve 2 in short circuit main body 1 inner chamber, center one way valve 2 comprises valve A 6 and valve plate A7, valve plate A7 is articulated on the body wall that is positioned at the valve opening below by gyroaxis A99, and the sidewall of valve A 6 is provided with the vestibule 10 that matches with valve plate A7 open position; Valve plate A7 and valve body form annular sealing surface; The vertical one way valve 3 of side direction comprises valve B 11 and valve plate B12, valve plate B12 is articulated on the end face of valve B 11 by gyroaxis B13, be set with torsion spring 14 on the gyroaxis B13, one end of torsion spring 14 presses on the valve B 11, the other end of torsion spring 14 presses on the valve plate B12, and torsion spring 14 is pressed in valve plate B12 on the valve B 11.Described positioner 8 comprises centring ring 15, jump ring 16 and locating ring 17, the inner chamber of short circuit main body 1 is provided with detent, centring ring 15 is arranged in the detent, centring ring 15 inwalls are provided with the inner card cage that cooperates with jump ring 16, jump ring 16 is arranged in the inner card cage of centring ring 15, and locating ring 17 is arranged in centring ring 15 inner chambers of jump ring 16 bottoms.
A kind of continuous cyclic drilling technique that is applicable to air drilling, it may further comprise the steps:
S1,The part that is positioned at annular sealing surface at the valve plate A7 of center one way valve 2 arranges sealing A, be positioned at the A of the section that is sealed and matched that the part setting of annular sealing surface is matched with sealing A at the valve A 6 of center one way valve 2, the part that is positioned at annular sealing surface at the valve plate B12 of the vertical one way valve 3 of side direction arranges sealing B, the B of the section that is sealed and matched that matches with sealing B the setting of the part of valve B 11 annular sealing surfaces; Before spudding in, connect first supercharger to the supply air line of air supply controller, divide again two-way to be connected to the pipeline of continuous circulation short circuit from air supply controller, first via pipeline A, be connected to the center one way valve 2 of continuous circulation short circuit by top driving device, the the second road pipeline B is arranged on the vertical one way valve of side direction 3 next doors of continuous circulation short circuit by snap joint, and is for subsequent use
S2,Connection pin thread 4 with the continuous circulation short circuit before the lower brill is connected with the drilling rod box, drilling tool being connected to the top drives again, during normal drillng operation, the center one way valve 2 of continuous circulation short circuit is in opening state, the vertical one way valve 3 of side direction is in closed condition, connect the passage of pipeline A, gas is entered by pipeline A, realize the circulation of gas; Recyclegas enters drilling rod by pipeline A through the center of continuous circulation short circuit one way valve 2 and realizes circulation;
S3,When the lower brill that makes up a joint, when drilling rod stops operating, driving continuation by pipeline A by the top keeps to continuous circulation short circuit center one way valve 2 air feed, then pipeline B for subsequent use is connected on the vertical one way valve 3 of side direction of continuous circulation short circuit, then, increase gradually gas pressure in the pipeline B, the valve plate B12 of the vertical one way valve 3 of side direction is opened, recyclegas is entered the inside of continuous circulation short circuit by the vertical one way valve 3 of side direction, reduce gradually again the pressure of gas in the pipeline A, when gas pressure in the pipeline A reduces to a certain degree the time, center one way valve 2 is autoshutdown under the High Pressure of side direction recyclegas, after the pipeline A release, unload being connected of drilling tool and continuous circulation short circuit, connect new drilling rod in the upper end of continuous circulation short circuit, then connect again a continuous circulation short circuit B in new drilling rod upper end, to be connected with the drilling tool that drives on the top is connected on the continuous circulation short circuit B that newly connects again, after installing, again open gradually pipeline A, center one way valve 2 air feed to continuous circulation short circuit B, and increase gradually the pressure of gas in the pipeline A, the valve plate A7 of center one way valve 2 opens, recyclegas enters rod string by center one way valve 2, when strengthening gradually the gas pressure of pipeline A, reduce gradually the pressure of gas in the pipeline B, the vertical one way valve 3 of side direction is closed, after the pipeline B release, pipeline B and the vertical one way valve 3 of side direction are disconnected, after pipeline B and vertical one way valve 3 disconnections of side direction, on the valve body of the vertical one way valve 3 of side direction, valve seat 36 is installed successively, spool 37 and relief valve 38, can carry out drillng operation, effectively guarantee the pressure stability of short circuit body interior; Repeatedly implement aforesaid operations, until finish drillng operation; ,
S4,When pulling out of hole, drilling rod stops operating, the relief valve 38 of installing on the valve body with the vertical one way valve 3 of the side direction of continuous circulation short circuit, spool 37 and valve seat 36 unload successively, driving continuation by pipeline A by the top keeps to continuous circulation short circuit center one way valve 2 air feed, pipeline B is connected to the vertical one way valve 3 of side direction of continuous circulation short circuit, and increase gradually the pressure of gas in the pipeline B, and reduce the gas pressure of pipeline A, the valve plate B12 of the vertical one way valve 3 of side direction of this circulation short circuit is opened, recyclegas is entered the inside of continuous circulation short circuit by the vertical one way valve 3 of side direction, when gas pressure in the pipeline A reduces to a certain degree the time, center one way valve 2 is autoshutdown under the High Pressure of side direction recyclegas, after the pipeline A release, unload the above drilling rod of continuous circulation short circuit that is in the rig floor table top, and by driving or tourist bus is placed on the drill string that unloads in the packing box on the top, and unload the continuous circulation short circuit that is installed in the drill string top;
S5, after finishing the dismounting in the 4th step, drilling tool is connected to again on the continuous circulation short circuit of rig floor table top, connect the center one way valve 2 of pipeline A and continuous circulation short circuit, and increase gradually gas pressure in the pipeline A, the valve plate A7 of center one way valve 2 opens, recyclegas enters the inside of continuous circulation short circuit by center one way valve 2, then, reduces gradually gas pressure in the pipeline B, the vertical one way valve 3 of side direction is closed, after the pipeline B release, the vertical one way valve 3 of pipeline B and side direction is disconnected, by driving or tourist bus is upwards carried drill string on the top, continue to implement the trip-out operation, when drill string plays next root circulation short circuit, repeat above-mentioned operation, just can finish whole trip-out constructions.
In loading and unloading drilling rod process, the pressure in the well remains constant, eliminated the adverse effect that the pressure oscillation that brings because of shutdown in the existing technique causes, and gas remains circulation in the well, has avoided the deposition of landwaste, has reduced the appearance of lock of tool drilling; Adopt simultaneously this technique, saved when beginning to creep into after each shutdown and rebulid the pressure balanced time, improved greatly drilling efficiency.
Such as Fig. 2, shown in Figure 3, described sealing A is the annular projection A18 that is arranged on the valve plate A7, and the A of the section that is sealed and matched that cooperates with the A of sealing section is arranged at the annular recess A19 that matches with annular projection A18 valve plate A7 on the valve A 6; Described sealing B is the annular projection B20 that is arranged on the valve plate B12, and the B of the section that is sealed and matched that cooperates with the B of sealing section is arranged at the annular recess B21 that matches with annular recess B21 valve plate A7 on the valve B 11; Sealing A cooperates the formation sealing with the section A of being sealed and matched, the inside and outside both sides of sealing A and the A of section that is sealed and matched, the annular sealing surface that valve plate A7 and valve A 6 form also forms sealing, thereby increased the sealing area of valve plate A7 and valve A 6, form continuous multi-stage sealed, good sealing effect, sealing performance is stable, sealing B cooperates the formation sealing with the section B of being sealed and matched, the inside and outside both sides of sealing B and the B of section that is sealed and matched, the annular sealing surface that valve plate B12 and valve B 11 form also forms sealing, thereby increased the sealing area of valve plate B12 and valve B 11, form continuous multi-stage sealed, good sealing effect, sealing performance is stable.
Such as Fig. 4, shown in Figure 5, described sealing A also can be the annular projection A18 that is arranged on the valve plate A7, the A of the section that is sealed and matched that cooperates with the A of sealing section is arranged at the annular recess A19 that matches with annular projection A18 valve plate A7 on the valve A 6, sealing A also comprises the taper surface A26 that is arranged on the valve plate A7, the section A of being sealed and matched also comprises and is arranged at the taper surface B27 that the taper surface with valve plate A7 on the valve A 6 matches, the surface that described valve plate A7 cooperates with valve A 6 also is provided with rubber layer A34, the inboard of sealing A and the A of section that is sealed and matched, the conical seal (contact) face that valve plate A7 and valve A 6 form forms sealing, the outside of sealing A and the A of section that is sealed and matched, the annular sealing surface that valve plate A7 and valve A 6 form also forms sealing, thereby further increased the sealing area of valve plate A7 and valve A 6, the rubber layer A34 that arranges on the surface of valve plate A7 has further strengthened the sealing performance of valve plate A7 and valve A 6.Described sealing B also can be the annular projection B20 that is arranged on the valve plate B12, the B of the section that is sealed and matched that cooperates with the B of sealing section is arranged at the annular recess B21 that matches with annular recess B21 valve plate A7 on the valve B 11, described sealing B also comprises the taper surface C28 that is arranged on the valve plate B12, the section B of being sealed and matched also comprises and is arranged at the taper surface D29 that the taper surface with valve plate B12 on the valve B 11 matches, the surface that valve plate B12 cooperates with valve B 11 also is provided with rubber layer B35, the inboard of sealing B and the B of section that is sealed and matched, the conical seal (contact) face that valve plate B12 and valve B 11 form forms sealing, thereby further increased the sealing area of valve plate B12 and valve B 11, the rubber layer B35 that arranges on the surface of valve plate B12 has further strengthened the sealing performance of valve plate B12 and valve B 11.
Such as Fig. 6, shown in Figure 7, described sealing A also can be the annular recess C22 that is arranged on the valve plate A7, and the A of the section that is sealed and matched that cooperates with the A of sealing section is arranged at the annular projection C23 that matches with annular recess C22 valve plate A7 on the valve A 6; Described sealing A also comprises the spherical A30 that is arranged on the valve plate A7, the section A of being sealed and matched also comprises and is arranged at the spherical B31 that the spherical with valve plate A7 on the valve A 6 matches, the surface that described valve plate A7 cooperates with valve A 6 also is provided with rubber layer A34, when center one way valve 2 is closed, sealing A cooperates the formation sealing with the section A of being sealed and matched, the inboard of sealing A and the A of section that is sealed and matched, the spherical seal surface that valve plate A7 and valve A 6 form forms sealing, the outside of sealing A and the A of section that is sealed and matched, the annular sealing surface that valve plate A7 and valve A 6 form also forms sealing, thereby increased the sealing area of valve plate A7 and valve A 6, form continuous multi-stage sealed, good sealing effect, sealing performance is stable, and the rubber layer A34 that arranges on the surface of valve plate A7 has further strengthened the sealing performance of valve plate A7 and valve A 6.Described sealing B also can be the annular recess D24 that is arranged on the valve plate B12, the B of the section that is sealed and matched that cooperates with the B of sealing section is arranged at the annular projection D25 that matches with annular recess D24 valve plate B12 on the valve B 11, described sealing B also comprises the spherical C32 that is arranged on the valve plate B12, the section B of being sealed and matched also comprises and is arranged at the spherical D33 that the spherical with valve plate B12 on the valve B 11 matches, the surface that valve plate B12 cooperates with valve B 11 also is provided with rubber layer B35, when the vertical one way valve 3 of side direction is closed, sealing B cooperates the formation sealing with the section B of being sealed and matched, the inboard of sealing B and the B of section that is sealed and matched, the spherical seal surface that valve plate B12 and valve B 11 form forms sealing, the outside of sealing B and the B of section that is sealed and matched, the annular sealing surface that valve plate B12 and valve B 11 form also forms sealing, thereby increased the sealing area of valve plate B12 and valve B 11, form continuous multi-stage sealed, good sealing effect, sealing performance is stable, and the rubber layer B35 that valve plate B12 surface arranges has further strengthened the sealing performance of valve plate B12 and valve B 11.
Claims (7)
1. continuous cyclic drilling technique that is applicable to air drilling, it is characterized in that: it may further comprise the steps:
S1, spud in before, connect first supercharger to the supply air line of air supply controller, divide again two-way to be connected to the pipeline of continuous circulation short circuit from air supply controller, first via pipeline A, be connected to the center one way valve (2) of continuous circulation short circuit by top driving device, the the second road pipeline B is arranged on by snap joint by the vertical one way valve of side direction (3) of continuous circulation short circuit, and is for subsequent use;
Connection pin thread (4) with the continuous circulation short circuit before S2, the lower brill is connected with the drilling rod box, drilling tool being connected to the top drives again, during normal drillng operation, the center one way valve (2) of continuous circulation short circuit is in opening state, the vertical one way valve of side direction (3) is in closed condition, connect the passage of pipeline A, gas is entered by pipeline A, realize the circulation of gas;
S3, when the lower brill that makes up a joint, when drilling rod stops operating, pipeline B for subsequent use is connected on the vertical one way valve of side direction (3) of continuous circulation short circuit, then, increase gradually gas pressure in the pipeline B, reduce gradually gas pressure in the pipeline A, after the pipeline A release, unload being connected of drilling tool and continuous circulation short circuit, connect new drilling rod in the upper end of continuous circulation short circuit, then connect again a continuous circulation short circuit B in new drilling rod upper end, to be connected with again the drilling tool that drives on the top and be connected on the continuous circulation short circuit B that newly connects, again open gradually pipeline A, reduce the pressure of gas in the pipeline B, the vertical one way valve of side direction (3) is closed, after the pipeline B release, pipeline B and the vertical one way valve of side direction (3) are disconnected, proceed drillng operation;
S4, when pulling out of hole, drilling rod stops operating, pipeline B is connected to the vertical one way valve of side direction (3) of continuous circulation short circuit, and increase gradually the pressure of gas in the pipeline B, and reduce the gas pressure of pipeline A, after the pipeline A release, unload the above drilling rod of continuous circulation short circuit that is in the rig floor table top, and by driving or tourist bus is placed on the drill string that unloads in the packing box on the top, and unload the continuous circulation short circuit that is installed in the drill string top;
S5, finish the 4th the step dismounting after, drilling tool is connected to again on the continuous circulation short circuit of rig floor table top, connect the center one way valve (2) of pipeline A and continuous circulation short circuit, and increase gradually gas pressure in the pipeline A, reduce gradually gas pressure in the pipeline B, after the pipeline B release, pipeline B and the vertical one way valve of side direction (3) are disconnected, by driving or tourist bus is upwards carried drill string on the top, continue to implement the trip-out operation.
2. a kind of continuous cyclic drilling technique that is applicable to air drilling according to claim 1, it is characterized in that: among the described step S3, after pipeline B and the vertical one way valve of side direction (3) disconnection, on the valve body of the vertical one way valve of side direction (3), valve seat (36), spool (37) and relief valve (38) are installed successively.
3. a kind of continuous cyclic drilling technique that is applicable to air drilling according to claim 2, it is characterized in that: among the described step S4, after drilling rod stopped operating, the relief valve (38) of installing on the valve body with the vertical one way valve of the side direction of continuous circulation short circuit (3), spool (37) and valve seat (36) unloaded successively.
4. a kind of continuous cyclic drilling technique that is applicable to air drilling according to claim 1, it is characterized in that: among the described step S1, also be included in the valve plate A(7 of center one way valve (2)) be positioned at the step that sealing A is set on the part of annular sealing surface.
5. a kind of continuous cyclic drilling technique that is applicable to air drilling according to claim 4, it is characterized in that: among the described step S1, the valve A (6) that also is included in center one way valve (2) is positioned at the step that the A of the section that is sealed and matched that matches with sealing A is set on the part of annular sealing surface.
6. a kind of continuous cyclic drilling technique that is applicable to air drilling according to claim 1, it is characterized in that: among the described step S1, also be included in the valve plate B(12 of the vertical one way valve of side direction (3)) be positioned at the step that sealing B is set on the part of annular sealing surface.
7. a kind of continuous cyclic drilling technique that is applicable to air drilling according to claim 6, it is characterized in that: among the described step S1, also be included in the step that the B of the section that is sealed and matched that matches with sealing B is set on the part of valve B (11) annular sealing surface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210561390.0A CN103046883B (en) | 2012-12-21 | 2012-12-21 | Continuous cyclic drilling process applicable to air drilling |
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| CN201210561390.0A CN103046883B (en) | 2012-12-21 | 2012-12-21 | Continuous cyclic drilling process applicable to air drilling |
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| CN103046883A true CN103046883A (en) | 2013-04-17 |
| CN103046883B CN103046883B (en) | 2015-07-08 |
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Cited By (9)
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| CN103485730A (en) * | 2013-10-11 | 2014-01-01 | 长江大学 | Uninterrupted air drilling circulating nipple |
| CN105756593A (en) * | 2014-12-19 | 2016-07-13 | 中石化胜利石油工程有限公司钻井工艺研究院 | Uninterrupted circulating valve |
| CN109538132A (en) * | 2018-12-27 | 2019-03-29 | 冀凯河北机电科技有限公司 | A kind of multi-purpose water-through jackrod of self-sealing |
| CN109736719A (en) * | 2019-03-01 | 2019-05-10 | 冀凯河北机电科技有限公司 | A kind of multi-purpose water-through jackrod of self-sealing |
| CN111927352A (en) * | 2020-09-08 | 2020-11-13 | 中国石油天然气集团有限公司 | Continuous circulation device for drilling fluid and using method thereof |
| CN112031686A (en) * | 2020-09-14 | 2020-12-04 | 北京博德世达石油技术股份有限公司 | Circulating valve special for wellhead, drilling equipment adopting circulating valve and drilling method |
| CN113175334A (en) * | 2021-04-29 | 2021-07-27 | 福建省亿方建设工程有限公司 | Drilling and grouting integrated grouting reinforcement construction method for tunnel |
| CN114622848A (en) * | 2021-06-02 | 2022-06-14 | 中国石油天然气集团有限公司 | Rotatable uninterrupted circulating device and using method and circulating process thereof |
| CN114682164A (en) * | 2022-06-02 | 2022-07-01 | 山东彩客新材料有限公司 | Jet flow hydrogenation reactor |
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| CN103485730A (en) * | 2013-10-11 | 2014-01-01 | 长江大学 | Uninterrupted air drilling circulating nipple |
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| CN112031686A (en) * | 2020-09-14 | 2020-12-04 | 北京博德世达石油技术股份有限公司 | Circulating valve special for wellhead, drilling equipment adopting circulating valve and drilling method |
| CN113175334A (en) * | 2021-04-29 | 2021-07-27 | 福建省亿方建设工程有限公司 | Drilling and grouting integrated grouting reinforcement construction method for tunnel |
| CN114622848A (en) * | 2021-06-02 | 2022-06-14 | 中国石油天然气集团有限公司 | Rotatable uninterrupted circulating device and using method and circulating process thereof |
| CN114682164A (en) * | 2022-06-02 | 2022-07-01 | 山东彩客新材料有限公司 | Jet flow hydrogenation reactor |
| CN114682164B (en) * | 2022-06-02 | 2022-08-09 | 山东彩客新材料有限公司 | Jet flow hydrogenation reactor |
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