CN119531757A - A retractable coupling locator, positioning method, system and application - Google Patents
A retractable coupling locator, positioning method, system and application Download PDFInfo
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- CN119531757A CN119531757A CN202510099514.5A CN202510099514A CN119531757A CN 119531757 A CN119531757 A CN 119531757A CN 202510099514 A CN202510099514 A CN 202510099514A CN 119531757 A CN119531757 A CN 119531757A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/04—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion
- E21B23/042—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion using a single piston or multiple mechanically interconnected pistons
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/04—Measuring depth or liquid level
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Abstract
本发明公开了一种可收缩式接箍定位器、定位方法、系统及应用，定位器的上接头和下接头分别嵌套在芯管的端部外侧，上导向环和下导向环分别嵌套在芯管的中部外侧，上导向环与上接头抵接，下导向环与芯管连接；背帽嵌套在上接头和上导向环的外侧，背帽与上接头连接，且背帽轴向方向延伸出上导向环的下端面；收缩机构嵌套在芯管外侧与下接头连接；收缩机构中的收缩缸套延伸出下导向环的上端面，背帽、收缩缸套与芯管之间形成容纳弹簧和定位爪的容纳腔；弹簧和定位爪位于芯管外侧且定位爪两端被上导向环和下导向环轴向限位；背帽和收缩缸套分别对定位爪径向限位；定位爪在弹簧作用下处于张开状态，收缩机构的收缩缸套可压缩定位爪以收缩至容纳腔中。
The invention discloses a retractable coupling locator, a positioning method, a system and an application thereof, wherein the upper joint and the lower joint of the locator are respectively nested on the outer side of the end of a core tube, the upper guide ring and the lower guide ring are respectively nested on the outer side of the middle part of the core tube, the upper guide ring abuts against the upper joint, and the lower guide ring is connected to the core tube; the back cap is nested on the outer side of the upper joint and the upper guide ring, the back cap is connected to the upper joint, and the back cap extends axially out of the lower end face of the upper guide ring; the retracting mechanism is nested on the outer side of the core tube and connected to the lower joint; the retracting cylinder sleeve in the retracting mechanism extends out of the upper end face of the lower guide ring, and an accommodating cavity for accommodating a spring and a positioning claw is formed between the back cap, the retracting cylinder sleeve and the core tube; the spring and the positioning claw are located on the outer side of the core tube, and the two ends of the positioning claw are axially limited by the upper guide ring and the lower guide ring; the back cap and the retracting cylinder sleeve respectively limit the positioning claw radially; the positioning claw is in an open state under the action of the spring, and the retracting cylinder sleeve of the retracting mechanism can compress the positioning claw to retract it into the accommodating cavity.
Description
Technical Field
The invention relates to the technical field of downhole tools of oil and gas wells, in particular to a retractable coupling positioner, a positioning method, a system and application.
Background
With the continuous deep oil reservoir development of the oil field, the continuous subdivision of the strata is required, so that the number of water injection stratum sections of the water injection well is continuously increased, and the lower depth of a working string (water injection string) is required to be accurately mastered, so that the aim of matching the separate injection string with a target stratum can be fulfilled.
Currently, the depth correction operation of a water injection well pipe column is mostly dependent on magnetic positioning depth correction, namely special equipment, instruments and personnel are needed to be used for operation and explanation. The operation of the pipe column is needed to be suspended before the magnetic positioning and depth correction, a depth correction instrument is installed at a wellhead, the instrument is put into an oil pipe, the instrument is put into a depth correction pup joint position to be recognized, the depth correction of the pipe column is completed, and part of wells which cannot be recognized and judged on site even need to be recognized and explained by professional interpreters. Therefore, the magnetic positioning depth correction is complex in operation, long in operation time and high in price, and is not beneficial to efficient development of oil and gas fields.
Disclosure of Invention
In order to realize that the coupling positioner can be suitable for the depth correction operation of a water injection well tubular column and solve the technical defect that a positioning claw is blocked, the invention provides a retractable coupling positioner, a positioning method, a system and application.
In a first aspect, embodiments of the present invention provide a collapsible coupling positioner that may include an upper joint, a core tube, a lower joint, a back cap, an upper guide ring, a lower guide ring, a plurality of springs, a plurality of positioning fingers, and a collapsing mechanism;
The upper guide ring and the lower guide ring are respectively nested outside the end part of the core tube and are respectively connected with the core tube, the upper guide ring and the lower guide ring are respectively nested outside the middle part of the core tube, the upper guide ring is abutted against the upper connector and the lower guide ring is in threaded connection with the core tube, the back cap is nested outside the upper connector and the upper guide ring, the back cap is connected with the upper connector, the axial direction of the back cap extends out of the lower end face of the upper guide ring, the shrinkage mechanism is nested outside the core tube and is connected with the lower connector, a shrinkage cylinder sleeve in the shrinkage mechanism extends out of the upper end face of the lower guide ring, and a containing cavity for containing the spring and the positioning claw is formed among the back cap, the shrinkage cylinder sleeve and the core tube;
the back cap and the contracted cylinder sleeve respectively limit the positioning claws radially, the positioning claws are in an open state under the supporting action of the elastic force of the springs, and the positioning claws can be matched with the gaps of the casing collar;
The shrinkage cylinder sleeve of the shrinkage mechanism can compress the positioning claw to enable the positioning claw to be in a compressed state so as to shrink into the accommodating cavity, so that the retractable coupling positioner can be lifted out after the depth correction operation is completed.
In one embodiment, the retraction mechanism may include a retraction cylinder liner, a stationary cylinder liner, and a piston assembly;
The core tube is provided with a through hole matched with the piston assembly, and the piston assembly is nested outside the core tube and the lower joint; the telescopic cylinder sleeve is nested outside the piston assembly and the lower guide ring, and a preset travel interval is reserved between the lower guide ring and the cone part at the lower part of the telescopic cylinder sleeve;
High-pressure fluid is injected into an annular cavity between the core tube and the piston assembly through the through hole so as to act on the piston assembly, so that the piston assembly drives the shrinkage cylinder sleeve to move to compress the positioning claw, and the positioning claw is in a compressed state to shrink into the accommodating cavity.
In one embodiment, the piston assembly may include a piston, a first pin, a lock tooth, a lock ring, and a piston top ring;
the piston is nested outside the core tube and the lower joint, the annular cavity is formed between the piston and the core tube, and the lower end of the piston is fixed with the lower joint through the first pin;
the lock teeth are nested at the outer side of the core tube and are connected with the core tube;
The locking ring is nested outside the locking teeth, one end of the locking ring is abutted with the cone body part at the lower part of the shrinkage cylinder sleeve, and the locking ring is meshed with the locking teeth to limit the strokes of the locking ring and the shrinkage cylinder sleeve;
the piston top ring is nested in the outer sides of the core tube, the lock teeth and the lock ring, one end of the piston top ring is abutted to the piston, the other end of the piston top ring is abutted to the cone portion at the lower portion of the shrinkage cylinder sleeve, and a preset stroke interval is reserved between one end of the piston top ring, which is abutted to the piston, and the lock teeth.
In one embodiment, the piston assembly further comprises a lock ring baffle ring, wherein the lock ring baffle ring comprises an inner boss and an outer boss, the lock ring baffle ring is nested outside the lock teeth and the lock ring, the inner boss is positioned between the lock teeth and the lock ring, and the lock ring baffle ring is limited by the lock teeth through the inner boss;
The outer boss is positioned between the fixed cylinder sleeve and the shrinkage cylinder sleeve, and the locking ring baffle ring is connected with the shrinkage cylinder sleeve;
One end of the locking ring baffle ring is abutted with the piston top ring;
High-pressure fluid is injected into an annular cavity between the core tube and the piston through the through hole so as to shear the first pin, and the piston acts on the locking ring baffle ring through the piston top ring; the locking ring baffle ring drives the locking ring and the shrinkage cylinder sleeve to move, so that the shrinkage cylinder sleeve compresses the positioning claw to enable the positioning claw to shrink into the accommodating cavity, and the shrinkage cylinder sleeve is locked through the locking ring and the locking teeth.
In one embodiment, the locking tooth abuts the lower guide ring.
In one embodiment, the piston assembly can further comprise a plurality of first sealing rings, wherein part of the first sealing rings are positioned between the piston and the core tube, and part of the first sealing rings are positioned between the piston and the fixed cylinder sleeve.
In one embodiment, the outside diameter of the shrink sleeve is the same as the outside diameter of the back cap.
In one embodiment, the retractable collar locator may further comprise a plurality of second pins, and the springs and the locating pawls are fixed by the second pins.
In one embodiment, the collapsible coupling positioner may further comprise a third pin, the back cap and the upper joint being secured by the third pin.
In one embodiment, the retractable collar locator may further comprise a plurality of second sealing rings positioned between the lower joint and the stationary cylinder liner of the retraction mechanism.
In a second aspect, embodiments of the present invention provide a collar positioning system that may include a wellhead work machine, a plurality of tubing, and a collapsible collar positioner as described in the first aspect;
The upper joint of the retractable coupling positioner is connected with the oil pipe, and the lower joint of the retractable coupling positioner is connected with the oil pipe through an oil pipe coupling;
The wellhead operation machine is provided with a weight indicator and is used for setting the oil pipe and the retractable coupling positioner into a casing pipe column, and the weight indicator is used for displaying the suspension point loads of the oil pipe and the retractable coupling positioner;
the retractable coupling locator is used for locating the casing coupling and correcting the depth of the pipe column through the change of the suspension point load on the weight indicator.
In a third aspect, an embodiment of the present invention provides a positioning method, where the positioning method is implemented by the retractable collar locator according to the first aspect, and the positioning method includes:
The retractable coupling positioner is connected through an oil pipe and is put into a target well;
Lifting the oil pipe until the positioning claw of the retractable coupling positioner is clamped in the gap of the casing coupling, and lifting the suspension point load displayed by the weight indicator on the wellhead operation machine on the ground to realize positioning and depth correction of the target well;
after the positioning depth correction is finished, high-pressure fluid is injected through an oil pipe, the high-pressure fluid acts on a contraction mechanism of the contractible coupling positioner, so that a contraction cylinder sleeve of the contraction machine compresses the positioning claw to contract into the accommodating cavity, and the contractible coupling positioner is lifted out after the depth correction operation is finished.
In a fourth aspect, embodiments of the present invention provide the use of a collapsible coupling positioner as described in the first aspect in coupling positioning depth correction.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least the following steps are included:
The embodiment of the invention provides a retractable coupling positioner, a positioning method, a system and application, which integrally solve the technical defect that the retractable coupling positioner cannot adapt to the depth correction operation of a water injection well pipe column, and particularly can quickly and simply finish the depth correction operation of the water injection pipe column when the retractable coupling positioner is put into a well along with the water injection pipe column operation. And in another key aspect, the retractable coupling positioner can complete retraction and locking along with the setting of the water injection pipe column after the depth correction operation is completed, so that the normal deblocking of the later-stage water injection pipe column and the lifting of the pipe column are not influenced, and the safety of the positioner applied in a water well is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a block diagram of a prior art casing collar locator;
FIG. 2 is a block diagram of a retractable collar locator provided in an embodiment of the present invention;
FIG. 3 is a block diagram of a retractable collar locator and casing collar location provided in an embodiment of the present invention;
FIG. 4 is a cross-sectional view taken along the direction A-A in FIG. 2;
FIG. 5 is a cross-sectional view taken along the direction B-B in FIG. 2;
FIG. 6 is a schematic diagram of a collar positioning system according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of the change of the suspended load when the sounding sleeve is short-circuited in the embodiment of the invention;
Wherein, the device comprises a 1-retractable coupling positioner, a 2-oil pipe, a 3-oil pipe coupling, a 4-wellhead operation machine, a 5-casing and a 6-casing coupling;
11-upper joint, 12-core tube, 13-lower joint, 14-back cap, 15-upper guide ring, 16-lower guide ring, 17-spring, 18-positioning claw, 19-contraction mechanism, 20-containing cavity, 21-first sealing ring, 22-second pin, 23-second sealing ring and 24-third pin;
121-through hole, 122-annular cavity, 191-contracted cylinder sleeve, 192-fixed cylinder sleeve, 193-piston assembly, 194-piston, 195-first pin, 196-locking tooth, 197-locking ring, 198-piston top ring, 199-locking ring baffle ring, 1911-cone;
1001-coupling, 1002-inner cylinder, 1003-outer cylinder, 1004-positioning slip, 1005-stop, 1006-outer mounting groove, 1007-upper pressing device, 1008-lower pressing device, 1009-compression device, 1010-bump, 1011-inner mounting groove, 1012-mounting hole, 1013-upper ring groove, 1014-lower ring groove, 1015-upper locking screw, 1016-lower locking screw.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "far," "near," "front," "rear," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The casing collar positioner in the prior art can be structured as shown in fig. 1, and comprises a collar 1001, an inner cylinder 1002, an outer cylinder 1003 and a positioning slip 1004, wherein the inner side of the lower part of the collar 1001 and the outer side of the upper part of the inner cylinder 1002 are fixedly installed together, a stop 1005 capable of blocking the outer cylinder 1003 is fixed on the outer side of the lower part of the inner cylinder 1002, the outer cylinder 1003 capable of rotating around the inner cylinder 1002 is installed on the outer side of the inner cylinder 1002 between the collar 1001 and the stop 1005, at least two outer installation grooves 1006 are symmetrically arranged on the outer side of the middle part of the outer cylinder 1003, an upper pressing device 1007 and a lower pressing device 1008 are respectively fixedly installed on the outer side of the upper part and the outer side of the lower part of the outer cylinder 1003, a compression device 1009 is installed in the outer installation grooves 1006, the upper end and the lower end of the positioning slip 1004 are respectively pressed on the inner side surfaces of the upper pressing device 1007 and the lower pressing device 1008, the outer side of the middle part of the positioning slip 1004 is fixedly provided with a bump 1010, the upper part of the bump 1010 is a slope with a wide upper part and a lower part, and the lower part of the bump 1010 is a slope with a wide upper part. The outer cylinder 1003 can rotate 360 degrees around the inner cylinder 1002 in the working process, so that the locking phenomenon is avoided in the process of entering a well of a coiled tubing, a bump 1010 is fixed on the outer side of the middle part of a positioning slip 1004, the outer diameter of the bump 1010 is larger than the outer diameters of an upper pressing device 1007 and a lower pressing device 1008, the upper part of the bump 1010 is an inclined plane with a wide upper part and a wide lower part, the lower part of the bump 1010 is an inclined plane with a wide upper part and a narrow lower part, in the working process, the coupling positioner is fixedly arranged at the lower end of a downhole tool string through a coupling 1001, when the coiled tubing is lowered near a construction position to be positioned, the coiled tubing is lifted up to perform casing coupling positioning, the lifting-up coiled tubing observes the change of the suspension weight, the bump 1010 on the positioning slip 1004 can squeeze the compression device 1009 when the lifting-up coiled tubing collides with the casing coupling, the positioning slip 1004 is contracted inwards and smoothly passes through the casing coupling 1001, and the suspension weight change of about 2.5 tons is fed back when the positioning slip 1004 passes through the casing coupling 1001, so that the actual position of the tool string carried by the coiled tubing is accurately judged in the well by combining the well body structure.
Specifically, referring to fig. 1, six outer mounting grooves 1006 are symmetrically formed on the outer side of the middle of the outer cylinder 1003, an inner mounting groove 1011 is formed on the inner side of the middle of the positioning slip 1004, and a compression device 1009 having a compression shape is mounted between the outer mounting groove 1006 of the outer cylinder 1003 and the inner mounting groove 1011 of the positioning slip 1004. This facilitates better snap-fitting of the compression device 1009 within the outer mounting groove 1006 and the inner mounting groove 1011. The upper pressing device 1007 is an upper pressing cover, a mounting hole 1012 is formed in the middle of the upper pressing cover, the upper pressing cover is mounted on the inner cylinder 1002 through the mounting hole 1012, the inner side of the middle of the upper pressing cover and the outer side of the upper part of the outer cylinder 1003 are fixedly mounted together, the lower pressing device 1008 is a lower pressing cover, the middle of the lower pressing cover is provided with the mounting hole 1012, the lower pressing cover is mounted on the inner cylinder 1002 through the mounting hole 1012, the inner side of the middle of the lower pressing cover and the outer side of the lower part of the outer cylinder 1003 are fixedly mounted together, and the upper end and the lower end of the positioning slip 1004 are respectively pressed on the inner side surfaces of the upper pressing cover and the lower pressing cover through the compression device 1009. In this way, the upper and lower glands better act as axial stops for the outer barrel 1003. The compression device 1009 is an arc compression spring piece with an outward opening, and/or an upper ring groove 1013 is arranged outside the upper end of the positioning slip 1004, a lower ring groove 1014 is arranged outside the lower end of the positioning slip 1004, the lower end of the upper compression device 1007 and the upper end of the lower compression device 1008 are respectively arranged in the upper ring groove 1013 and the lower ring groove 1014, and the upper end and the lower end of the positioning slip 1004 are respectively compressed on the inner sides of the upper compression device 1007 and the lower compression device 1008 through the compression device 1009. Like this, arc compression spring piece can be better play compression effect.
An upper screw hole is provided at the lower end of the upper pressing device 1007, an upper locking screw 1015 is fixedly installed in the upper screw hole, the inner end surface of the upper locking screw 1015 is pressed on the outer side surface of the upper end of the positioning slip 1004, a lower screw hole is provided at the upper end of the lower pressing device 1008, a lower locking screw 1016 is fixedly installed in the lower screw hole, the inner end surface of the lower locking screw 1016 is pressed on the outer side surface of the lower end of the positioning slip 1004, and/or the coupling 1001 and the inner cylinder 1002 are fixedly installed together by screw threads, the upper pressing device 1007 and the outer cylinder 1003 are fixedly installed together by screw threads, and the lower pressing device 1008 and the outer cylinder 1003 are fixedly installed together by screw threads. In this way, the upper locking screw 1015 and the lower locking screw 1016 are fixedly installed together through threads, and are convenient to install and detach.
The inventor finds that the coupling locator in the prior art can be used for multiple times and is suitable for working condition scenes such as multiple times of fracturing. However, when the water injection well works, tools in the water injection well need to be in environments of corrosion, scaling and dirt blocking for a long time, positioning blocks of the existing coupling positioner are always opened after the positioning is completed, the outer diameter of the coupling positioner positioning slips (positioning claws) in the prior art in the opening state is larger than the inner diameter of a sleeve, the positioning claws are easy to lock after the water injection well works for a long time, a water injection pipe column cannot be smoothly started out of the well, and even the water injection pipe column is blocked and blocked to cause major repair of the well, so that the coupling positioner cannot be applied to the water injection well. In order to realize that the coupling positioner can be suitable for the deep-correcting operation of a tubular column of a water injection well and solve the technical defect that the positioning claw is blocked, the invention is provided for overcoming the problems or at least partially solving the problems.
In the embodiment of the invention, a retractable coupling positioner 1 is provided, and referring to fig. 2 and 3, the retractable coupling positioner 1 can comprise an upper joint 11, a core tube 12, a lower joint 13, a back cap 14, an upper guide ring 15, a lower guide ring 16, a plurality of springs 17, a plurality of positioning claws 18 and a retraction mechanism 19; wherein, the upper joint 11 and the lower joint 13 are respectively nested outside the end part of the core tube 12 and are respectively connected with the core tube 12; the upper guide ring 15 and the lower guide ring 16 are respectively nested outside the middle part of the core tube 12, the upper guide ring 15 is abutted with the upper joint 11, the lower guide ring 16 is in threaded connection with the core tube 12, the back cap 14 is nested outside the upper joint 11 and the upper guide ring 15, the back cap 14 is connected with the upper joint 11, the back cap 14 extends out of the lower end face of the upper guide ring 15 in the axial direction, the shrinkage mechanism 19 is nested outside the core tube 12 and connected with the lower joint 13, a shrinkage cylinder sleeve 191 in the shrinkage mechanism 19 extends out of the upper end face of the lower guide ring 16, a containing cavity 20 for containing the spring 17 and the locating claw 18 is formed between the back cap 14, the shrinkage cylinder sleeve 191 and the core tube 12, a plurality of springs 17 and a plurality of locating claws 18 are located outside the core tube 12, two ends of the locating claws 18 are axially limited by the upper guide ring 15 and the lower guide ring 16, the back cap 14 and the shrinkage cylinder sleeve 191 are respectively radially limited by the locating claws 18, the locating claws 18 are in an open state under the elastic supporting effect of the springs 17, the locating claws 18 can be matched with the clearance of the sleeve collar 6, the shrinkage cylinder sleeve 191 of the shrinkage mechanism 19 can compress the locating claws 18, and the locating claws 18 are in a compressed state, so that the locating claws 18 are in a compressed state, and the locating claws 18 are in a compressed state, so that the containing cavity 20 can be in a compressed state, and a well-contracted state, and a well-formed well after a well-being well-formed.
Referring to fig. 6, when the retractable collar locator provided in the embodiment of the invention is used, the upper joint 11 is connected through the oil pipe 2, the lower joint 13 is connected with the oil pipe 2 through the oil pipe 2 collar, and the wellhead working machine 4 is lowered into a target oil well to perform locating and depth correcting operations. In this embodiment, the positioning claw 18 is used for matching with the gap of the casing coupling 6, and in the process of positioning and depth correction, the positioning claw 18 is clamped in the gap of the casing coupling 6, so that the suspension point load of the weight indicator on the wellhead working machine 4 of the oil pipe 2 can be obviously increased. The retractable coupling positioner 1 in the embodiment of the invention can compress and retract the positioning claws 18 into the accommodating cavity 20 through the contraction mechanism 19, so that the resistance of the casing coupling 6 is avoided in the process of the tripping operation, and the positioning claws 18 are not blocked due to long-term corrosion scaling or dirt blocking in the casing string, so that the retractable coupling positioner 1 can better avoid the risks of scaling, corrosion and Yi Ka blocking of a water injection well.
It should be noted that, the structure of the positioning claw 18 in the embodiment of the invention is similar to that of the existing positioning claw 18, the upper part is an inclined plane with a narrow upper part and a wide lower part, the lower part is an inclined plane with a wide upper part and a narrow lower part, and when in operation, the positioning claw 18 is clamped in a gap of the casing coupling 6, and the lifting oil pipe 2 can position the casing coupling 6. Referring to fig. 3, the locator is lowered into the water injection well together with the oil pipe 2 and the tool string required by the water injection well, and the inclined plane of the lower part of the maximum outer diameter of the locating claw 18 has a smaller included angle with the axis in the lowering process, so that the locating claw 18 cannot be clamped when the locating claw 18 encounters the casing collar 6 gap between the casings 5, and the lowering of the water injection pipe column is not affected. It should be noted that, referring to fig. 4 and 5, the upper guide ring 15 and the lower guide ring 16 are provided with a plurality of guide grooves, which are matched with the positions of the spring 17 and the positioning claw 18 and limit the radial movement of the spring 17 and the positioning claw 18 along the guide grooves.
The retractable coupling positioner provided by the embodiment of the invention integrally solves the technical defect that the depth correcting operation of the water injection well pipe column cannot be adapted, and on the specific hand, the depth correcting operation of the water injection well pipe column can be rapidly and simply completed along with the operation of the water injection well pipe column. And in another key aspect, the retractable coupling positioner can complete retraction and locking along with the setting of the water injection pipe column after the depth correction operation is completed, so that the normal deblocking of the later-stage water injection pipe column and the lifting of the pipe column are not influenced, and the safety of the positioner applied in a water well is improved.
In one embodiment, referring to FIG. 2, the contraction mechanism 19 may comprise a contraction cylinder sleeve 191, a fixed cylinder sleeve 192 and a piston assembly 193, wherein a through hole 121 matched with the piston assembly 193 is formed on the core tube 12, the piston assembly 193 is nested outside the core tube 12 and the lower joint 13, the fixed cylinder sleeve 192 is nested outside the lower joint 13 and the piston assembly 193 and is connected with the lower joint 13, the contraction cylinder sleeve 191 is nested outside the piston assembly 193 and the lower guide ring 16, a preset stroke interval is reserved between the lower guide ring 16 and a cone 1911 at the lower part of the contraction cylinder sleeve 191, and high-pressure fluid is injected into an annular cavity 122 between the core tube 12 and the piston assembly 193 through the through hole 121 to act on the piston assembly 193, so that the piston assembly 193 drives the contraction cylinder sleeve 191 to move to compress the positioning claw 18 to enable the positioning claw 18 to be in a compressed state to be contracted into the accommodating cavity 20.
The fixed cylinder sleeve 192 in the embodiment of the invention is in threaded connection with the lower joint 13, and a chamber for accommodating the piston assembly 193 is reserved between the fixed cylinder sleeve 192 and the core tube 12, so that the piston assembly 193 can conveniently move and compress the contracted cylinder sleeve 191. It should be noted that, in the embodiment of the present invention, the through hole 121 formed on the core tube 12 is a pressure transmitting hole, which facilitates the injection of the high-pressure fluid into the annular cavity 122 between the piston assembly 193 and the core tube 12 to compress the piston assembly 193 for movement.
In this embodiment, the shrinkage sleeve cylinder is far away from the back cap 14 in a state that the piston 194 does not apply a force, so that the accommodating cavity 20 is in an open state, the positioning claw 18 extends out of the accommodating cavity 20 under the action of the elastic force of the spring 17, and after the positioning and depth correcting operation is completed, the piston assembly 193 can drive the shrinkage sleeve 191 to move so as to compress the positioning claw 18, so that the positioning claw 18 is in a compressed state to shrink into the accommodating cavity 20, and thus the normal unsealing of the later-stage water injection pipe column and the lifting of the pipe column are not affected, and the safety of the application of the positioner in a water well is improved.
In another embodiment, referring to FIG. 2, the piston assembly 193 may include a piston 194, a first pin 195, a lock tooth 196, a lock ring 197 and a piston top ring 198, wherein the piston 194 is nested outside the core tube 12 and the lower joint 13, an annular cavity 122 is formed between the piston 194 and the core tube 12, the lower end of the piston 194 is fixed with the lower joint 13 through the first pin 195, the lock tooth 196 is nested outside the core tube 12 and connected with the core tube 12, the lock ring 197 is nested outside the lock tooth 196, one end of the lock ring 197 is abutted with a cone 1911 below the shrink cylinder sleeve 191, and the lock ring 197 is meshed with the lock tooth 196 to limit the stroke of the lock ring 197 and the shrink cylinder sleeve 191, a piston top ring 198 is nested outside the core tube 12, the lock tooth 196 and the lock ring 197, one end of the piston top ring 198 is abutted with the piston 194, and the other end of the piston top ring 198 is abutted with the cone 1911 below the shrink cylinder sleeve 191, and a preset stroke interval is reserved between the end of the piston top ring 198 abutted with the lock tooth 196.
In the embodiment of the invention, the piston 194 is fixedly connected with the lower joint 13 through the first pin 195 in the initial state, when the positioning claw 18 needs to be contracted, high-pressure fluid in the oil pipe 2 enters the annular cavity 122 between the piston 194 and the core pipe 12 through the through hole 121, the pressure in the oil pipe 2 is transmitted to the piston 194, the first pin 195 is sheared after the thrust of the piston 194 reaches the shearing force of the first pin 195, and the piston 194 can act on the cone 1911 at the lower part of the contracted cylinder sleeve 191 through the piston top ring 198 under the pressure of the oil pipe 2, so that the contracted cylinder sleeve 191 contracts the positioning claw 18 into the accommodating cavity 20.
In another embodiment, and as shown with reference to FIG. 2, the piston assembly 193 may further include a lock ring stop ring 199, the lock ring stop ring 199 including an inner boss and an outer boss, the lock ring stop ring 199 being nested outside of the lock teeth 196 and the lock ring 197, the inner boss being located between the lock teeth 196 and the lock ring 197, the lock ring stop ring 199 being limited by the lock teeth 196 through the inner boss, the outer boss being located between the fixed cylinder sleeve 192 and the contracted cylinder sleeve 191, and the lock ring stop ring 199 being connected to the contracted cylinder sleeve 191, the lock ring stop ring 199 being abutted at one end to a piston crown ring 198, high pressure fluid being injected through the through hole 121 into the annular cavity 122 between the core tube 12 and the piston 194 to shear the first pin 195, the piston 194 acting on the lock ring stop ring 199 through the piston crown ring 198, the lock ring stop ring 199 driving the lock ring 197 and the contracted cylinder sleeve 191 to move such that the contracted cylinder sleeve 191 compresses the positioning pawl 18 into the receiving cavity 20, and the lock ring 197 and the contracted cylinder sleeve 191 being engaged by the lock ring 197 and the lock ring 191.
In this embodiment, in the process of pushing the shrink cylinder sleeve 191 to move, the piston 194 can drive the lock ring baffle ring 199 to move at the same time, so that the lock ring 197 can move upwards together, the lock ring 197 can slide along the outside of the lock teeth 196 to lock the shrink cylinder sleeve 191 finally, so that after the shrink cylinder sleeve 191 is locked, the high-pressure fluid operation in the oil pipe 2 can be finished, and the collapsible coupling positioner 1 can be conveniently lifted out.
In a specific embodiment, and as shown with reference to FIG. 2, the locking teeth 196 are in abutment with the lower guide ring 16. In this embodiment, the lock teeth 196 abut against the lower guide ring 16, so that the sliding travel of the lock ring 197 can be maximized, and the distance between the back cap 14 and the shrink cylinder sleeve 191 can be minimized.
In a specific embodiment, referring to FIG. 2, the piston assembly 193 may further include a plurality of first seal rings 21, a portion of the first seal rings 21 being located between the piston 194 and the core tube 12 and a portion of the first seal rings 21 being located between the piston 194 and the stationary cylinder liner 192. The effect of the first sealing ring 21 in the embodiment of the invention can ensure the tightness between the piston 194 and the core tube 12, and ensure that the annular cavity 122 and the oil tube 2 are in the same high pressure state in the process of contracting the positioning claw 18.
In a specific embodiment, referring to FIG. 2, the outside diameter of the contracted cylinder liner 191 is the same as the outside diameter of the back cap 14. In this embodiment, the outer diameters of the shrink sleeve 191 and the back cap 14 are set to be the same size, so that on one hand, after the shrink sleeve 191 compresses the positioning pawl 18 into the accommodating cavity 20, the shrink sleeve 191 and the back cap 14 completely close the accommodating cavity 20, and the phenomenon that the back cap 14 or part of the accommodating cavity 20 protrudes to cause clamping or unsmooth lifting in the process of the lifting process can be avoided. Further, when the positioning claw 18 compresses the spring 17 and is tightly attached to the core tube 12, the positioning claw 18 is in a contracted state, and when the positioning claw 18 is in a contracted state, the maximum diameter of the positioning claw 18 is equal to the maximum diameters of the back cap 14 and the contracted cylinder sleeve 191, so that the problem that the smooth lifting of the water injection pipe string is influenced due to the fact that the positioning claw 18 is still in an open state when the lifting operation is performed, and the blocking load is generated at each casing coupling 6 is avoided.
In a specific embodiment, referring to FIG. 2, retractable collar locator 1 may further comprise a plurality of second pins 22, with springs 17 and detents 18 secured by second pins 22. In the embodiment, the spring 17 and the positioning claw 18 are fixed, so that the positioning claw 18 is supported in an open state by the elastic force of the spring 17 in the positioning and depth correcting operation, and after the positioning and depth correcting operation is finished, the positioning claw 18 is compressed by contracting the cylinder sleeve 191, so that the spring 17 is compressed to retract the positioning claw 18 into the accommodating cavity 20. In this embodiment, the second pin 22 may or may not be sheared during the process of compressing the positioning pawl 18, which is not particularly limited in the embodiment of the present invention.
In a specific embodiment, referring to FIG. 2, collapsible coupling positioner 1 may further comprise a third pin 24, and back cap 14 and upper connector 11 may be secured by third pin 24. In this embodiment, the back cap 14 and the upper joint 11 are fixedly connected by the third pin 24, so that the connection stability between the back cap 14 and the upper joint 11 is enhanced.
In a specific embodiment, referring to FIG. 2, the collapsible coupling positioner 1 may further comprise a plurality of second sealing rings 23, wherein the plurality of second sealing rings 23 are located between the lower joint 13 and the fixed cylinder sleeve 192 of the collapsing mechanism 19. In this embodiment, since the piston assembly 193 is located in the chamber between the fixed cylinder sleeve 192 and the core tube 12, the tightness between the lower joint 13 and the fixed cylinder sleeve 192 needs to be ensured during the upward movement of the piston 194 in the piston assembly 193, and the tightness between devices is ensured by providing the second sealing ring 23.
Based on the same inventive concept, the embodiment of the invention also provides a coupling positioning system, which is shown by referring to fig. 3 and 6, and can comprise a wellhead working machine 4, a plurality of oil pipes 2 and the retractable coupling positioner 1, wherein an upper joint 11 of the retractable coupling positioner 1 is connected with the oil pipes 2, a lower joint 13 of the retractable coupling positioner 1 is connected with the oil pipes 2 through the oil pipe coupling 3, a weight indicator is arranged in the wellhead working machine 4, the wellhead working machine 4 is used for placing the oil pipes 2 and the retractable coupling positioner 1 into a casing 5 pipe column, the suspension point loads of the oil pipes 2 and the retractable coupling positioner 1 are displayed through the weight indicator, the retractable coupling positioner 1 is used for positioning the casing coupling 6, and the pipe column is deepened through the change of the suspension point loads on the weight indicator.
The coupling positioning system is assembled by a pipe column, and a retractable coupling positioner can be matched and connected to the upper part or the lower part of a tool string. The construction design needs to provide 5 pieces of casing depth data and casing nipple depth data of the retractable coupling locator. The retractable coupling positioner is connected to the upper part of the tool string in a matching way, and when the calculated depth correction result is compared with the magnetic positioning depth correction result, the depth correction pup joint is connected to the upper part of the two oil pipes of the tool string in a matching way, and the retractable coupling positioner is connected between the two oil pipes at the lower part of the depth correction pup joint. The retractable coupling positioner is connected to the upper part of the tool string in a matching way, and when the calculated depth correction result is not compared with the magnetic positioning depth correction result, the depth correction pup joint is not connected to the upper part of the tool string in a matching way, and the retractable coupling positioner is connected between the two oil pipes at the upper part of the tool string. When the retractable collar locator is coupled to the lower portion of the tool string, the retractable collar locator can be coupled to the lower portion of the tool string below an oil pipe.
Specifically, after the retractable coupling positioner in the embodiment of the invention is lowered to a preset position along with an oil pipe, the maximum outer diameter of the positioning claw is attached to the inner diameter of a lower casing under the action of the elastic force of the spring in the process of slowly lifting the oil pipe, and referring to fig. 3, when the positioning claw of the retractable coupling positioner 1 passes through the casing coupling 6 gap between the casings 5, the maximum outer diameter of the positioning claw is attached to the inner diameter of the casing coupling under the action of the elastic force of the spring, and then the inclined plane on the upper part of the maximum outer diameter of the positioning claw is attached to the inner diameter of the upper casing continuously and slides out, and because the inclined plane on the upper part of the maximum outer diameter of the positioning claw has a larger included angle with the axis, an additional lifting load is required to enable the positioning claw to slide out of the casing coupling 6 gap between the casings 5 completely. As shown in connection with fig. 7, the weight scale of the wellhead work machine may observe a slow load rise before the locating dogs do not fully slip out of the casing collar gap between the casing. And continuously lifting the oil pipe until the lifting load exceeds the highest load required by the positioning claws to slide out of the casing coupling gaps among the casings completely, and then judging that the positioning claws slide out of the casing coupling gaps among the casings completely by observing the sudden drop of the load by a weight indicator of the wellhead operation machine. And when the wellhead marks the position of the oil pipe when the load of the weight indicator suddenly descends and is on the same level as the wellhead plane, according to the geometric length data of the oil pipe which is in the well when the load is measured on the ground and the well completion data is compared with the casing pipe deep record, the actual depth of the positioning claw in the water injection well when the oil pipe which is in the well and the tool string are affected by dead weight and buoyancy can be calibrated and calculated, so that the actual depth of each tool in the tool string is calculated, and the purpose of correcting the depth of the water injection pipe column is realized.
Because the whole water injection pipe column needs to work for a long time under the severe conditions of corrosion, scaling, sand setting and dirt blocking, if the positioning claw is still in an open state after the positioning and depth correction are finished, the positioning claw is difficult to flexibly shrink or even lose the shrink capability after working for a long time in the severe environment of the water injection well, thereby generating additional lifting load at each casing coupling when the water injection pipe column needs to be lifted out, being unfavorable for smooth lifting of the water injection pipe column, if the positioning claw loses the shrink space due to the influence of the reasons of corrosion, scaling, sand setting, dirt blocking and the like, the positioning claw is difficult to pass through or even be completely blocked when passing through the casing coupling or the casing diameter reducing section, thereby causing serious consequences that the water injection pipe column cannot be lifted out, and causing huge economic loss to an oil field. Therefore, the positioning claw is required to be in a contracted state after the depth correction of the pipe column is completed, and the setting operation of the packer in the tool string is required to be carried out immediately after the depth correction of the water injection pipe column is completed, so that the setting pressure in the oil pipe can be utilized to push the piston, the piston top ring, the locking ring baffle ring and the contracted cylinder sleeve to ascend, and meanwhile, the locking ring is pushed by the locking ring baffle ring and slides upwards along the outer surface of the locking tooth. In addition, because the pressure required by shearing of the shear pins is set to be higher than the setting pressure of the packer in the tool string, the relative positions of the piston and the lower joint are limited by the shear pins before the completion of the depth correcting operation, the piston cannot be in misoperation to lead the positioning claw to shrink in advance, and the positioning claw can be ensured to be in an open state all the time before the packer in the tool string is set. When the shrinkage cylinder sleeve moves upwards to the position where the lower end face of the guide ring is attached, the piston top ring and the lock ring stop ring cannot move upwards continuously, at the moment, the lock ring slides to the final position and is meshed with the reverse teeth on the lock teeth to lock the relative position between the shrinkage cylinder sleeve and the lock teeth, meanwhile, the shrinkage cylinder sleeve slides along the inclined plane of the lower part of the maximum outer diameter of the locating claw to compress the maximum outer diameter of the locating claw to be the same as the outer diameter of the shrinkage cylinder sleeve, the risk that the locating claw cannot shrink to enable the whole water injection pipe column to meet the clamping after the locator works in a water well for a long time is eliminated, and therefore the purposes of safety, convenience and low cost depth correction of the water injection pipe column are achieved.
Based on the same inventive concept, the embodiment of the invention also provides an application of the retractable collar locator in the collar locating and depth correction.
The specific description and the beneficial effects of the coupling positioning system, the positioning method and the application of the retractable coupling positioner in the coupling positioning depth correction can be referred to the related description of the retractable coupling positioner, and the embodiments of the present invention are not repeated here.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. The present disclosure is not limited to the precise construction that has been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (13)
1. The retractable coupling positioner is characterized by comprising an upper joint, a core tube, a lower joint, a back cap, an upper guide ring, a lower guide ring, a plurality of springs, a plurality of positioning claws and a retraction mechanism;
The upper guide ring and the lower guide ring are respectively nested outside the end part of the core tube and are respectively connected with the core tube, the upper guide ring and the lower guide ring are respectively nested outside the middle part of the core tube, the upper guide ring is abutted against the upper connector and the lower guide ring is in threaded connection with the core tube, the back cap is nested outside the upper connector and the upper guide ring, the back cap is connected with the upper connector, the axial direction of the back cap extends out of the lower end face of the upper guide ring, the shrinkage mechanism is nested outside the core tube and is connected with the lower connector, a shrinkage cylinder sleeve in the shrinkage mechanism extends out of the upper end face of the lower guide ring, and a containing cavity for containing the spring and the positioning claw is formed among the back cap, the shrinkage cylinder sleeve and the core tube;
the back cap and the contracted cylinder sleeve respectively limit the positioning claws radially, the positioning claws are in an open state under the supporting action of the elastic force of the springs, and the positioning claws can be matched with the gaps of the casing collar;
The shrinkage cylinder sleeve of the shrinkage mechanism can compress the positioning claw to enable the positioning claw to be in a compressed state so as to shrink into the accommodating cavity, so that the retractable coupling positioner can be lifted out after the depth correction operation is completed.
2. The collapsible coupling positioner of claim 1, wherein the collapsing mechanism comprises a collapsing cylinder liner, a stationary cylinder liner, and a piston assembly;
The core tube is provided with a through hole matched with the piston assembly, and the piston assembly is nested outside the core tube and the lower joint; the telescopic cylinder sleeve is nested outside the piston assembly and the lower guide ring, and a preset travel interval is reserved between the lower guide ring and the cone part at the lower part of the telescopic cylinder sleeve;
High-pressure fluid is injected into an annular cavity between the core tube and the piston assembly through the through hole so as to act on the piston assembly, so that the piston assembly drives the shrinkage cylinder sleeve to move to compress the positioning claw, and the positioning claw is in a compressed state to shrink into the accommodating cavity.
3. The collapsible coupling positioner of claim 2, wherein the piston assembly comprises a piston, a first pin, a lock tooth, a lock ring, and a piston top ring;
the piston is nested outside the core tube and the lower joint, the annular cavity is formed between the piston and the core tube, and the lower end of the piston is fixed with the lower joint through the first pin;
the lock teeth are nested at the outer side of the core tube and are connected with the core tube;
The locking ring is nested outside the locking teeth, one end of the locking ring is abutted with the cone body part at the lower part of the shrinkage cylinder sleeve, and the locking ring is meshed with the locking teeth to limit the strokes of the locking ring and the shrinkage cylinder sleeve;
the piston top ring is nested in the outer sides of the core tube, the lock teeth and the lock ring, one end of the piston top ring is abutted to the piston, the other end of the piston top ring is abutted to the cone portion at the lower portion of the shrinkage cylinder sleeve, and a preset stroke interval is reserved between one end of the piston top ring, which is abutted to the piston, and the lock teeth.
4. The collapsible coupling positioner of claim 3 wherein the piston assembly further comprises a lock ring stop ring comprising an inner boss and an outer boss, the lock ring stop ring being nested outside the lock teeth and the lock ring, the inner boss being located between the lock teeth and the lock ring, the lock ring stop ring being retained by the lock teeth by the inner boss;
The outer boss is positioned between the fixed cylinder sleeve and the shrinkage cylinder sleeve, and the locking ring baffle ring is connected with the shrinkage cylinder sleeve;
One end of the locking ring baffle ring is abutted with the piston top ring;
High-pressure fluid is injected into an annular cavity between the core tube and the piston through the through hole so as to shear the first pin, and the piston acts on the locking ring baffle ring through the piston top ring; the locking ring baffle ring drives the locking ring and the shrinkage cylinder sleeve to move, so that the shrinkage cylinder sleeve compresses the positioning claw to enable the positioning claw to shrink into the accommodating cavity, and the shrinkage cylinder sleeve is locked through the locking ring and the locking teeth.
5. A collapsible coupling positioner according to claim 3, wherein the locking teeth abut the lower guide ring.
6. The collapsible coupling positioner of claim 3 wherein the piston assembly further comprises a plurality of first seal rings, a portion of the first seal rings being located between the piston and the core tube and a portion of the first seal rings being located between the piston and the stationary cylinder liner.
7. The collapsible coupling positioner of claim 2, wherein the outer diameter of the collapsed cylinder liner is the same as the outer diameter of the back cap.
8. The retractable collar locator of any one of claims 1-7, further comprising a plurality of second pins, wherein the springs and the locating pawls are secured by the second pins.
9. The collapsible coupling positioner of any one of claims 1-7, further comprising a third pin, wherein the back cap and the upper joint are secured by the third pin.
10. The retractable collar locator of any one of claims 1-7, further comprising a plurality of second seal rings, wherein a plurality of second seal rings are positioned between the lower joint and a stationary cylinder liner of the retraction mechanism.
11. A collar locating system comprising a wellhead working machine, a plurality of oil pipes and a retractable collar locator according to any one of claims 1 to 10;
The upper joint of the retractable coupling positioner is connected with the oil pipe, and the lower joint of the retractable coupling positioner is connected with the oil pipe through an oil pipe coupling;
The wellhead operation machine is provided with a weight indicator and is used for setting the oil pipe and the retractable coupling positioner into a casing pipe column, and the weight indicator is used for displaying the suspension point loads of the oil pipe and the retractable coupling positioner;
the retractable coupling locator is used for locating the casing coupling and correcting the depth of the pipe column through the change of the suspension point load on the weight indicator.
12. A positioning method, characterized in that the positioning method is implemented by a retractable collar locator according to any one of claims 1 to 10, the positioning method comprising:
The retractable coupling positioner is connected through an oil pipe and is put into a target well;
Lifting the oil pipe until the positioning claw of the retractable coupling positioner is clamped in the gap of the casing coupling, and lifting the suspension point load displayed by the weight indicator on the wellhead operation machine on the ground to realize positioning and depth correction of the target well;
after the positioning depth correction is finished, high-pressure fluid is injected through an oil pipe, the high-pressure fluid acts on a contraction mechanism of the contractible coupling positioner, so that a contraction cylinder sleeve of the contraction machine compresses the positioning claw to contract into the accommodating cavity, and the contractible coupling positioner is lifted out after the depth correction operation is finished.
13. Use of a collapsible coupling positioner in coupling positioning depth correction, wherein the collapsible coupling positioner is a collapsible coupling positioner according to any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510099514.5A CN119531757A (en) | 2025-01-22 | 2025-01-22 | A retractable coupling locator, positioning method, system and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202510099514.5A CN119531757A (en) | 2025-01-22 | 2025-01-22 | A retractable coupling locator, positioning method, system and application |
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| CN119531757A true CN119531757A (en) | 2025-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202510099514.5A Pending CN119531757A (en) | 2025-01-22 | 2025-01-22 | A retractable coupling locator, positioning method, system and application |
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| CN (1) | CN119531757A (en) |
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| CN2611586Y (en) * | 2003-03-26 | 2004-04-14 | 中国石油化工股份有限公司河南油田分公司石油工程技术研究院 | Mechanical depth correcting device for underground pipe column |
| CN201513169U (en) * | 2009-08-14 | 2010-06-23 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Depth measuring device for fine blocking and sealing pipe column |
| CN202531161U (en) * | 2012-03-22 | 2012-11-14 | 中国石油天然气股份有限公司 | Positioning device for small-clamping-distance stratified water injection |
| CN202745839U (en) * | 2012-07-26 | 2013-02-20 | 中国石油天然气股份有限公司 | Coupling positioner |
| CN105587293A (en) * | 2016-02-23 | 2016-05-18 | 中国石油天然气股份有限公司 | Coupling seat-type underground production allocation device |
| CN111255398A (en) * | 2018-12-03 | 2020-06-09 | 中国石油天然气集团有限公司 | Soft slip anchor and method of use |
| CN118532141A (en) * | 2024-05-24 | 2024-08-23 | 中国海洋石油集团有限公司 | Fracturing filling sectional packer |
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2025
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2611586Y (en) * | 2003-03-26 | 2004-04-14 | 中国石油化工股份有限公司河南油田分公司石油工程技术研究院 | Mechanical depth correcting device for underground pipe column |
| CN201513169U (en) * | 2009-08-14 | 2010-06-23 | 中国石油化工股份有限公司胜利油田分公司采油工艺研究院 | Depth measuring device for fine blocking and sealing pipe column |
| CN202531161U (en) * | 2012-03-22 | 2012-11-14 | 中国石油天然气股份有限公司 | Positioning device for small-clamping-distance stratified water injection |
| CN202745839U (en) * | 2012-07-26 | 2013-02-20 | 中国石油天然气股份有限公司 | Coupling positioner |
| CN105587293A (en) * | 2016-02-23 | 2016-05-18 | 中国石油天然气股份有限公司 | Coupling seat-type underground production allocation device |
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