CN209761371U

CN209761371U - bearing assembly for tubular column and tubular column

Info

Publication number: CN209761371U
Application number: CN201920209653.9U
Authority: CN
Inventors: 唐文波; 修海媚; 巩永刚; 陈增海; 谭才渊; 曹颖; 赵连宝; 徐鲲; 田芳; 李铁; 王涛; 田媛; 徐振东; 李文涛; 张明; 冯一; 杨喜; 李凡; 吴少路; 殷福森
Original assignee: Zhongke Jinjia (beijing) Oilfield Technology Development Co Ltd
Current assignee: Zhongke Jinjia (beijing) Oilfield Technology Development Co Ltd
Priority date: 2019-02-19
Filing date: 2019-02-19
Publication date: 2019-12-10
Anticipated expiration: 2029-02-19

Abstract

The utility model discloses a carrier assembly and tubular column for tubular column belongs to oil, natural gas sand control well completion field. The tubular column includes setting device and packer, wherein, setting device and packer pass through bearing assembly and connect, bearing assembly includes collet, bear the lug, round pin axle and elastic component, collet includes collet main part and a plurality of elastic claw that connect each other, be provided with a plurality of lug grooves that are used for holding elastic lug on the collet main part, the dabber hole that passes the lug groove sets up on the collet main part at the axial of collet main part, bear the lug including bearing lug main part and setting up first arch, the second arch on bearing lug main part, be provided with the recess between first arch and second arch, the position that corresponds the recess in bearing lug main part is provided with the elastic component hole that is used for holding elastic component, the round pin axle passes core shaft hole and recess in proper order, the one end of elastic component supports and leans on the round pin axle.

Description

bearing assembly for tubular column and tubular column

Technical Field

The utility model relates to an oil, natural gas sand control well completion field, in particular to a carrier assembly and tubular column for tubular column.

Background

Loose sandstone oil and gas reservoirs are widely distributed in the world, and the oil and gas reservoirs are shallow in burial and loose in cementation, so that sand is easy to produce in the production process. Currently, sand control treatments can be performed by both gravel packing and simple sand control.

the gravel packing sand control is that after a sand control pipe column is put in, mortar with certain concentration is pumped into a well from a drill rod by a ground sand control pump, then the mortar enters a sieve pipe, the annular space of a sleeve and a perforation pore passage through a selective conversion tool until the whole sand control section is covered, and sand carrying liquid flows through the sieve pipe and returns to the ground or enters a stratum along with gravel. And simple sand control is then behind the sand control tubular column of going into down, relies on the screen pipe on the sand control tubular column to keep off the stratum sand outside the screen pipe, need not to carry out the packing of mortar, and is simpler and easier.

The top packer and its setting tool are mainly used to seal the annular space between casing and sand-preventing pipe string and to hang the sand-preventing completion pipe string, and are one of the key tools in gravel packing and simple sand-preventing technology.

at present, a small amount of open reports about top packers for sand prevention and setting tools thereof exist in the field of sand prevention, and after a pipe string is unset, slips are easily clamped in the process of lifting the pipe string, and the problems that torque cannot be transmitted, releasing is difficult, setting is easy to advance and the like exist in the process of lowering the pipe string.

chinese patent No. CN104508234B discloses a top packer for sand control, in which the slip device is a set of split slips. In use it has been found that the slips are easily deflected to jam the casing during tripping and cannot transmit torque during run in.

Chinese patent publication No. CN205117260U discloses a hydraulic setting tool for preventing advance setting. During the use process, the tool is found to be incapable of preventing the packer from being set in advance during the lifting and lowering processes after the blockage.

Chinese patent granted publication nos. CN204457577U and CN204457537U disclose a hydraulic retrievable sand control packer and a hydraulic releasing and setting tool, respectively. In the patent, the slip device is a group of split slips, and the slips are easy to deflect to block the casing pipe in the lifting process after deblocking; but not torque during run in. The anti-advancing setting is realized by shearing pins in the hydraulic retrievable sand control packer, but the shearing value of the pins is not designed to be too high, so that the anti-advancing setting capability is poor. At the in-process that uses hydraulic pressure to release setting instrument, setting instrument and packer between the release mode be annular space pressurization, need beat the drilling rod and switch over to annular space and beat, then switch over to the drilling rod again and beat and fall the bottom ball seat, make the operation complicated like this, well head equipment receives the restriction of bearing capacity easily when annular space is beaten moreover.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one aspect of the above-mentioned problem and defect that exist among the prior art, the utility model provides a bearing assembly and tubular column for tubular column. The technical scheme is as follows:

One object of the utility model is to provide a bearing assembly for tubular column.

another object of the present invention is to provide a tubular column.

According to one aspect of the present invention, there is provided a load bearing assembly for a pipe string, the pipe string comprising a setting device and a packer, wherein,

The setting device and the packer are connected through the bearing assembly, the bearing assembly comprises an elastic chuck, a bearing lug, a pin shaft and an elastic component, the elastic chuck comprises an elastic chuck body and a plurality of elastic claws which are connected with each other, a plurality of lug grooves used for containing the elastic lugs are arranged on the elastic chuck body, a mandrel hole penetrating through the lug grooves is arranged on the elastic chuck body along the axial direction of the elastic chuck body,

The bearing lug comprises a bearing lug body, a first bulge and a second bulge which are arranged on the bearing lug body, a groove is arranged between the first bulge and the second bulge, an elastic member hole for accommodating the elastic member is arranged in the bearing lug body at the position corresponding to the groove,

the pin shaft sequentially penetrates through the core shaft hole and the groove, one end of the elastic component is propped against the pin shaft,

the middle part of the setting device is sleeved on the elastic claws, and the top end of the packer is abutted against the first bulge and the second bulge.

Specifically, the elastic chuck main body is annular, a plurality of lug grooves are arranged at intervals along the circumferential direction of the elastic chuck main body,

The plurality of elastic claws are arranged along the circumferential direction of the elastic chuck main body, long grooves are formed between two adjacent elastic claws in the plurality of elastic claws, and the long grooves are arranged along the longitudinal direction of the plurality of elastic claws.

Further, the collet body has a body cavity, and each of a plurality of collet jaws includes a jaw head and a jaw body, one end of the jaw body with the jaw head is connected, the other end sets up on the collet body.

Particularly, a bearing annular groove for accommodating the claw head of each elastic claw is arranged at one end of the setting device close to the packer along the circumferential direction of the setting device,

and annular grooves are formed in the inner wall of the elastic chuck body and correspond to the lug grooves.

Specifically, the bottom end of the load-bearing lug body has an inner boss and an outer boss projecting from the inner surface and the outer surface of the load-bearing lug body, respectively,

The bearing lug body is accommodated in the lug groove, and the inner boss and the outer boss abut against the inner wall of the annular groove.

further, in the assembling state, the first protrusion and the second protrusion protrude out of the outer surface of the elastic chuck body,

The elastic member is a spring.

according to another aspect of the present invention, there is provided a pipe string, wherein,

The tubular column comprises the bearing assembly, the setting device and the packer,

the setting device comprises an upper joint, a protective sleeve, a setting short section, an outer cylinder pressing cap, a separating ring, a piston outer cylinder, a piston extension cylinder, a setting mandrel, a sliding sleeve pressing cap, a setting sliding sleeve, a shearing outer sleeve, a shearing release sleeve, a locking block supporting sleeve, a locking block reed, a shearing pawl, a release pawl, a positioning short section, a ball seat short section, an inner flushing pipe sleeve, a sealing ring assembly, a sealing mandrel and an outer flushing pipe short section,

the upper joint is connected with the upper end of the setting short section and then sleeved on the protective sleeve, the outer surface of the lower end of the setting short section is connected with the separating ring and the inner surface of the piston outer barrel arranged below the separating ring, the upper end of the piston outer barrel is sleeved with the outer barrel pressing cap, the inner surface of the lower end of the setting short section is connected with the upper end of the setting mandrel, the setting mandrel is sequentially sleeved with the piston and a piston extending barrel, the upper ends of the piston and the piston extending barrel are accommodated in the piston outer barrel, the sliding sleeve pressing cap and the setting sliding sleeve are sleeved at the lower end of the piston extending barrel, the lower end of the piston extending barrel is sleeved on the elastic claws of the elastic chucks in the bearing assembly, the bearing assembly is sleeved on the setting mandrel, and the bearing ring groove is arranged on the inner surface of the lower end of the piston extending barrel along the circumferential direction of the piston extending barrel, the top of packer supports and leans on bear on the first arch and the second arch of lug seat seal spindle of the below of bearing component is equipped with in proper order the cover is equipped with cut overcoat, cut release cover, release pawl, locking piece support cover and location nipple joint, it establishes to cut the pawl cover on the release pawl, the lower pot head of location nipple joint is established ball seat nipple joint upper end, just the lower pot head of ball seat nipple joint is established on the surface of interior towards sheathed tube upper end, interior towards sheathed tube lower extreme with set up the love seal ring assembly cover of interior towards sleeve tube below is established the upper end of sealed dabber, just interior towards the sleeve pipe with the internal surface of sealed dabber with the surface connection of interior towards pipe nipple joint, the surface of sealed dabber lower extreme with the internal surface connection of outer towards pipe nipple joint.

Specifically, the lower end of the setting core shaft is provided with a first spline groove,

The surface of the inner cavity of the shearing pawl is provided with first internal splines and first internal spline grooves at intervals along the circumferential direction, the outer surface of the shearing pawl is provided with first external splines at intervals along the circumferential direction,

second internal splines are arranged on the surface of the inner cavity of the release pawl at intervals along the circumferential direction, second external splines and second external spline grooves are arranged on the outer surface of the release pawl at intervals along the circumferential direction,

the end part of the upper end of the upper short section is provided with second spline grooves at intervals along the circumferential direction,

The first spline groove is matched with the second internal spline, the first internal spline is matched with the second external spline groove, the first internal spline groove is matched with the second external spline, and the first external spline is matched with the second spline groove.

furthermore, a plurality of rectangular grooves and a plurality of water passing grooves are formed in the positioning short section, the rectangular grooves are formed in the upper end of the positioning short section and are arranged at intervals along the circumferential direction, and the water passing grooves are formed below the rectangular grooves and are arranged at intervals along the circumferential direction.

Specifically, the locking piece supporting sleeve is sleeved on the setting core shaft, the lower end of the locking piece supporting sleeve is accommodated in an inner cavity at the upper end of the positioning short section, a threaded locking piece is sleeved on the locking piece supporting sleeve, and a locking piece reed is arranged in an inner cavity between the locking piece supporting sleeve and the threaded locking piece.

Specifically, a plurality of first annular top surfaces and a plurality of supporting sleeve annular grooves are arranged on the outer surface of the locking piece supporting sleeve along the longitudinal direction, the plurality of annular top surfaces and the plurality of supporting sleeve annular grooves are alternately arranged, each first annular top surface in the plurality of first annular top surfaces is arranged along the circumferential direction of the locking piece supporting sleeve, and each supporting sleeve annular groove in the plurality of supporting sleeve annular grooves is arranged along the circumferential direction of the locking piece supporting sleeve.

Further, the threaded locking block is connected with the inner surface of the upper short section through a thread pair, a plurality of second annular top surfaces, a plurality of locking block annular grooves, a cutting groove and a reed hole are arranged on the inner surface of the threaded locking block, the plurality of second annular top surfaces and the plurality of locking block annular grooves are alternately arranged along the longitudinal direction of the threaded locking block, each second annular top surface in the plurality of second annular top surfaces is arranged along the circumferential direction of the threaded locking block, each locking block annular groove in the plurality of locking block annular grooves is arranged along the circumferential direction of the threaded locking block,

the reed hole is provided on one of the second annular top surfaces of the middle portion of the screw lock block, and the cut groove extends from an inner surface of an upper end of the screw lock block into the reed hole in a longitudinal direction of the screw lock block.

specifically, a first annular top surface in the locking piece support sleeve and a second annular top surface in the threaded locking piece correspond to each other, and a support sleeve annular groove of the locking piece support sleeve and a locking piece annular groove of the threaded locking piece correspond to each other,

One end of the lock block spring is inserted into the spring hole of the threaded lock block, and the other end of the lock block spring penetrates through the cutting groove and is pressed at the upper end of the lock block supporting sleeve.

Further, the packer comprises a guide joint, a seat sleeve, an upper short section, a packer mandrel, a rubber barrel upper seat, a wave-shaped spring, a lock ring, a rubber barrel guide shoe, an inner rubber barrel, an outer rubber barrel, a rubber barrel lower seat, a push ring, an upper cone, a slip, a guide ring, a lower cone, a mandrel lock block, a stop sleeve, a packer outer barrel, a switch sleeve, a bearing ring and a bottom joint,

The inner surface of the upper end of the guide joint is in contact with the outer surface of the setting sliding sleeve, the inner surface of the lower end of the guide joint is connected with the upper end of the setting sleeve, the inner surface between the upper end and the lower end of the guide joint protrudes inwards along the radial direction to form a slope, the slope and the upper end of the setting sleeve surround each other to form a packer annular groove, the first bulge and the second bulge of the bearing lug in the bearing assembly are accommodated in the packer annular groove,

The outer surface of the lower end of the seat sleeve is connected with the inner surface of the upper seat of the rubber cylinder, the inner surface of the lower end of the seat sleeve is connected with the outer surface of the upper short section, the inner surfaces of the two ends of the upper short section are respectively connected with the thread locking block and the outer surface of the upper end of the mandrel of the packer,

The packer mandrel sequentially penetrates through the inner cavities of the upper rubber sleeve seat, the inner rubber sleeve, the push ring, the upper cone, the slips, the guide ring, the lower cone, the stop sleeve and the switch sleeve, the inner surface of the upper rubber sleeve seat is sequentially connected with the lower end of the seat sleeve, the lock ring and the outer surface of the packer mandrel, a wave spring seat and a wave spring are sequentially sleeved on the outer surface of the packer mandrel in the upper rubber sleeve seat from top to bottom, the lock ring is arranged below the wave spring, the outer rubber sleeve and the rubber sleeve guide shoe are sleeved at two ends of the inner rubber sleeve, the packer mandrel is connected with the lower cone through the mandrel lock block, the upper end of the stop sleeve is connected with the outer surface of the lower cone, the lower end of the stop sleeve is connected with the upper end of the outer packer cylinder, and the inner surface of the lower end of the outer packer cylinder is in threaded connection with the bottom joint, the bearing ring is arranged in the inner cavity of the outer packer barrel, and the switch sleeve is sleeved between the outer packer barrel and the bearing ring.

further, the slip is provided with annular crests, first left and right cutting grooves alternately arranged with each other, the first left cutting grooves extending from a first end of the slip to a second end portion disposed opposite the first end, and the first right cutting grooves extending from the second end of the slip to the first end portion, the annular crests being disposed on outer surfaces of the first and second ends of the slip, respectively.

Specifically, the slip is further provided with a pin hole, the annular cusp is divided into a plurality of cusp segments by the first left cutting groove, the pin hole is arranged on the cusp segment between the adjacent first left cutting grooves, the slip is connected with the upper cone of the packer through the pin hole, a conical surface with the thickness gradually reduced towards the end part is arranged on the inner surface of each cusp segment in the plurality of cusp segments,

The slips are integrally formed, and the section of the annular tooth point is wavy.

Specifically, the bearing ring is provided with a third ring top surface, a bearing ring annular groove, a second right cutting groove and a second left cutting groove, the third ring top surface and the bearing ring annular groove are alternately arranged on the outer surface of the bearing ring along the lengthwise direction of the bearing ring, the third ring top surface is arranged along the circumferential direction of the bearing ring, and the bearing ring annular groove is arranged along the circumferential direction of the bearing ring,

the second left and right slots of the load ring are alternately arranged with each other, the second left slot extending from an upper end of the load ring to a lower end portion of the load ring in a lengthwise direction of the load ring, and the right slot extending from a lower end of the load ring to an upper end portion of the load ring in the lengthwise direction of the load ring.

Specifically, the switch sleeve is provided with a plurality of water passing holes, water passing grooves, a fourth annular top surface, a switch sleeve annular groove and an unsealing step, the plurality of water passing holes are arranged on the outer surface of the switch sleeve along the circumferential direction of the switch sleeve, the plurality of water passing grooves are arranged at intervals along the circumferential direction of the switch sleeve, the plurality of water passing holes are respectively communicated with the corresponding water passing grooves in the plurality of water passing grooves, and the plurality of water passing holes are located at the upper ends of the plurality of water passing grooves and are perpendicular to the plurality of water passing grooves.

the fourth annular top surface of the switch sleeve and the annular groove of the switch sleeve are arranged on the inner surface of one end of the switch sleeve and are arranged at intervals, the fourth annular top surface corresponds to the third annular top surface of the bearing ring, the annular groove of the bearing ring corresponds to the annular groove of the switch sleeve, and the inner surface of the other end of the switch sleeve protrudes inwards along the radial direction of the switch sleeve to form the deblocking step.

According to the utility model discloses a bearing component and tubular column for tubular column have at least one in following advantage:

(1) the utility model provides a bearing assembly and tubular column for tubular column is a top packer and a setting device that special use is used to gravel packing or simple sand control, and the slips that set up in this tubular column is monolithic structure, and the resilience force is big to have certain length, can not take place to deflect in the process of lifting after the packer unpacks to pull, and make the slips can not be blocked all the time in the lifting process after the unpacks, thereby avoided the slips to be blocked the dead condition to take place;

(2) The utility model provides a bearing assembly and tubular column for tubular column have the function of transmission moment of torsion, if meet the resistance at the in-process of running into the tubular column, can relieve by corotation tubular column and meet the resistance.

(3) The utility model provides a bearing assembly and tubular column mode of giving up for tubular column can be for the mode of giving up is suppressed to the drilling rod, can also be for adopting corotation (namely clockwise rotation) tubular column mode of giving up, suppress from the drilling rod when suppressing giving up, this mode is low to well head equipment pressure-bearing requirement, and need not to suppress the pipeline and suppress and carry out frequent switching between drilling rod is suppressed and annular space is suppressed;

(4) The bearing component for the tubular column and the tubular column provided by the utility model adopt the structure of the elastic chuck and the bearing lug to prevent advance setting, so that the tubular column has strong advance setting prevention capability;

(5) The utility model provides a bearing assembly for a tubular column and an inner washing pipe nipple in the tubular column are provided with a rotary structure, when the bearing assembly is connected with an inner washing pipe in a well, the inner washing pipe with large weight or a top packer and a setting device do not need to be rotated;

(6) the bearing component for the tubular column and the circulating channels special for gravel filling, such as the water through grooves or the water through holes, are arranged at a plurality of positions in the tubular column, and the setting device can prevent the occurrence of a piston effect in the lifting and lowering processes after releasing, thereby avoiding the accident of stratum collapse;

(7) The utility model provides a bearing component and tubular column for tubular column are equipped with the outer wash pipe nipple joint and the interior wash pipe nipple joint that have standard wash pipe screw thread, easily with the wash union coupling that gravel packing used, and sealed spindle is last to be equipped with the top circulation hole, and sealing ring assembly is established to outside cover, above-mentioned these structures are suitable for gravel packing operation.

drawings

these and/or other aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the preferred embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1a is a schematic structural view of the left end portion of a pipe string according to one embodiment of the present invention, wherein the left end portion is taken from the top sub to the cut-off line 1-1;

FIG. 1b is a schematic structural view of a middle section of a tubular string according to an embodiment of the present invention, wherein the middle section is shown from cut-off line 1-1 to cut-off line 2-2 in the drawings;

FIG. 1c is a schematic structural view of the right end portion of a pipe string according to one embodiment of the present invention, wherein the right end portion is the portion from the cut-off line 2-2 to the bottom sub in the drawing;

FIG. 2 is a schematic structural diagram of the setting sub shown in FIG. 1 a;

FIG. 3 is a schematic structural view of the setting mandrel of FIG. 1 a;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 1 a;

FIG. 5 is a schematic view of the collet of FIG. 1 a;

FIG. 6 is a schematic view of the structure of the load-bearing lug shown in FIG. 1 a;

FIG. 7a is an enlarged partial view of the circle indicated by the marker M in FIG. 1 a;

FIG. 7b is a schematic structural view of the load bearing assembly shown in FIG. 1 a;

FIG. 8 is a schematic view of the shear pawl shown in FIG. 1 a;

FIG. 9 is a schematic view of the release pawl shown in FIG. 1 a;

FIG. 10 is a cross-sectional view taken along line B-B of FIG. 1B;

FIG. 11 is a schematic structural diagram of the upper sub shown in FIG. 1 b;

FIG. 12 is a schematic structural view of the lock block support sleeve shown in FIG. 1 b;

FIG. 13 is a schematic structural view of the threaded locking block shown in FIG. 1 b;

FIG. 14 is a schematic view of the installation of the threaded locking block shown in FIG. 13;

FIG. 15 is a cross-sectional view taken along line C-C of FIG. 1 b;

FIG. 16 is a schematic structural view of the positioning sub shown in FIG. 1 b;

FIG. 17 is a schematic structural view of the packer mandrel shown in FIG. 1 b;

FIG. 18 is a schematic view of the construction of the double-start locking thread shown in FIG. 17;

FIG. 19 is a schematic view of the lock ring threads of the lock ring shown in FIG. 1 b;

FIG. 20 is a schematic illustration of the slip construction shown in FIG. 1 b;

FIG. 21 is a schematic view of the guide ring shown in FIG. 1 c;

FIG. 22 is a schematic structural view of the load ring shown in FIG. 1 c;

Fig. 23 is a schematic view of the structure of the switch housing shown in fig. 1 c.

Detailed Description

the technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components. The following description of the embodiments of the present invention with reference to the drawings is intended to explain the general inventive concept and should not be construed as limiting the invention.

Loose sandstone oil and gas reservoirs are widely distributed in the world, and the oil and gas reservoirs are shallow in burial and loose in cementation, so that sand is easy to produce in the production process. Currently, the sand control treatment is usually performed by using two modes of gravel packing and simple sand control, and a top packer and a setting tool thereof are one of key tools in the gravel packing and simple sand control process technology. This top packer and setting instrument all have the deblocking tubular column at present after, carry the tubular column in-process slips easily and be blocked, and go into tubular column in-process still can not transmit the moment of torsion, the difficult, the easy scheduling problem of setting in advance of releasing.

The utility model provides a bearing assembly and tubular column for tubular column have one kind specially to gravel packing or top packer that simple and easy sand control was used and sit and seal the device, can solve above-mentioned technical problem.

Referring to fig. 1a-1c, the string includes a setting device and a packer (e.g., a top packer, i.e., the packer closest to the wellhead for suspending the sand control string after it is run into the well). The setting device comprises an upper joint 2, a protective sleeve 3, a setting short section 5, an outer cylinder pressing cap 7, a separating ring 8, a flat key 11, a piston 13, a piston outer cylinder 15, a piston extension cylinder 16, a setting mandrel 17, a sliding sleeve pressing cap 18, a setting sliding sleeve 21, a bearing assembly, a shearing outer sleeve 24, a shearing release sleeve 29, a locking piece supporting sleeve 30, a locking piece spring 31, a shearing pawl 33 (shown in figure 8), a release pawl 36 (shown in figure 9), a positioning short section 37, a setting ball 41, a ball seat short section 44, an inner flushing pipe short section 48, an inner flushing pipe sleeve 49, a sealing ring assembly 50, a sealing mandrel 52 and an outer flushing pipe short section 54.

The packer comprises a guide joint 55, a setting sleeve 57, an upper short section 58, a packer mandrel 60, a rubber sleeve upper seat 61, a wave spring seat 62, a wave spring 63, a locking ring 65, a rubber sleeve guide shoe 66, an inner rubber sleeve 67, an outer rubber sleeve 68, a rubber sleeve lower seat 69, a push ring 70, an upper cone 72, an upper cone split ring 74, a slip 76, a guide ring 77, a lower cone 79, a mandrel locking block 80, a stop sleeve 81, a packer outer cylinder 82, a switch sleeve 83, a bearing ring 84 and a bottom joint 87. The setting mandrel 17 sequentially passes through the inner cavities of the setting short section 5, the piston 13, the piston extension cylinder 16, the bearing component, the shearing outer sleeve 24, the shearing release sleeve 29, the release pawl 36, the locking block supporting sleeve 30 and the positioning short section 37.

The inner surface of one end of the upper joint 2 is connected with the protective sleeve 3 through a thread pair, the outer surface of the other end of the upper joint is connected with the inner surface of the upper end of the setting short section 5 through a set screw 4 and the thread pair, namely, the first end of the setting short section 5 extends to the outer surface of the upper joint 1 and is connected with the upper joint 1 in a sealing mode through an O-shaped ring 6. The inner surface of the lower end of the setting short joint 5 is connected with a setting mandrel 17. An O-shaped ring 1 is further arranged between the upper connector 2 and the protective sleeve 3, and the upper connector 2 and the protective sleeve 3 are connected with each other in a sealing mode through the O-shaped ring 1. As shown in fig. 1a, 2 and 3, the setting sub 5 is provided with a plurality of pressure transmission holes 501 and keyways 502. All the pressure transmission holes in the plurality of pressure transmission holes 501 extend from the middle part of the setting short section 5 and extend to the bottom end of the setting short section 5, and the adjacent pressure transmission holes in the plurality of pressure transmission holes 501 are arranged at intervals. The bottom end of the setting short section 5 is one end connected with the setting mandrel 17. It will be understood by those skilled in the art that the term "upper end" as used herein is the end that is adjacent to the wellhead after the string is run into the well, and the term "lower end" is the end that is adjacent to the bottom of the well after the string is run into the well.

as shown in fig. 1a and fig. 2, a plurality of key slots 502 for receiving the flat keys 11 are further provided at the bottom end of the setting sub 5, and the plurality of key slots 502 and the plurality of pressure transfer holes 501 are alternately arranged with each other. Referring to fig. 3, one end of the setting mandrel 17 is provided with a key groove 171, the other end is provided with a spline groove 172 and a short pin hole 173, the key groove 171 and the spline groove 172 are respectively arranged along the circumferential direction of the setting mandrel 17, and the short pin hole 173 is arranged on the opposite sides of the other end of the setting mandrel 17. With reference to fig. 1a, 2 and 3, the flat key 11 is installed in the key slot 502 and the key slot 171, the setting sub 5 is connected with the setting mandrel 17 through the flat key 11 and the thread pair, so as to transmit torque, and the setting sub 5 is connected with the setting mandrel 17 through the O-ring 9 in a sealing manner.

referring to fig. 1a, a piston 13 is sleeved at one end of the setting mandrel 17 adjacent to the setting nipple 5, and the piston 13 is arranged at the lower end of the pressure transmission hole 501, that is, one end of the pressure transmission hole is communicated with the inner cavity of the upper joint 1, and the other end is communicated to the piston 13. The piston 13 is provided with an O-ring 14 inside, whereby the piston 13 forms a sealed connection with the setting mandrel 17. Meanwhile, the setting nipple 5 and the piston 13 are also provided with O-shaped rings 10 on the outer parts (namely the outer surfaces) so that the setting nipple 5 and the piston 13 form a sealing connection with a piston outer cylinder 15 sleeved outside the setting nipple 5 and the piston 13. Referring to fig. 1a and 4, an outer cylinder pressing cap 7 is sleeved on the left end of the piston outer cylinder 15 (i.e., the end close to the setting nipple 5, the left end is the left side of the page where the piston outer cylinder is located), the piston outer cylinder 15 is fixedly connected with the outer cylinder pressing cap 7 through a set screw 12, and a separation ring 8 is further sleeved on the setting nipple 5 between the ends of the piston outer cylinder 15 in the inner cavity of the outer cylinder pressing cap 7.

as shown in fig. 3, a piston extension cylinder 16 is sleeved on the middle portion of the setting mandrel 17 (i.e. the setting mandrel 17 below the piston outer cylinder 15), and is fixedly connected with the piston extension cylinder 16 through a starting setting pin 22. One end of the piston extension cylinder 16 is arranged in the inner cavity of the piston outer cylinder 15, the other end of the piston extension cylinder extends out of the inner cavity of the piston outer cylinder 15 and is positioned below the piston outer cylinder 15, a setting sliding sleeve 21 is sleeved on the outer surface of the other end of the piston extension cylinder 16, and a releasing pin 20 is arranged between the setting sliding sleeve and the setting sliding sleeve. The outside of one end of the setting sliding sleeve 21 close to the piston extension cylinder 16 is sleeved with a sliding sleeve pressing cap 18, and a set screw 19 is arranged between the two.

Referring to fig. 1a and 5-7b, the lower end of the piston extension cylinder 16 (i.e. the end on which the setting sliding sleeve is sleeved) is sleeved on an elastic chuck 23 in a bearing assembly, and the bearing assembly is sleeved on a setting mandrel 17 below the piston extension cylinder 16. The carrier assembly further includes a carrier lug 25, a resilient member 26, and a pin 27, and the collet 23 includes a collet body 235 and a plurality of resilient fingers 236 connected to one another. The collet body 235 is annular, the plurality of resilient fingers 236 are disposed along a circumferential direction of the collet body, a long groove 231 is disposed between two adjacent resilient fingers 236 of the plurality of resilient fingers 236, and the long groove 231 is disposed along a longitudinal direction of the plurality of resilient fingers 236. The collet body 235 has a body cavity through which the setting mandrel 17 passes and is removably connected to the carrier assembly. Each of the plurality of resilient fingers 236 includes a finger head 237 and a finger body 238, and one end of the finger body 238 is connected to the finger head 237, and the other end is disposed on the collet body 235. As shown in fig. 5, the outer surface of the claw head 237 protrudes further outward than the outer surface of the claw body 238.

it will be understood by those skilled in the art that the head 237 and body 238 of each resilient finger 236 may be integrally formed, or may be two separate components that are connected by welding, screws, etc., and that each resilient finger 236 and the collet body 235 may also be integrally formed, or may be fixedly connected by welding, screws, etc., and that those skilled in the art may select the connection between the head and body, or between the collet body and each resilient finger, as desired, and that this example is merely an illustrative example, and those skilled in the art may select the connection accordingly.

as shown in fig. 5-7b, a plurality of lug slots 232 are formed in the collet body 235 for receiving the resilient lugs, and a mandrel hole 233 passing through the lug slots 232 is formed in the collet body 235 in a circumferential direction of the collet body 235. A plurality of lug grooves 232 are spaced along the circumference of the collet body 235.

The bearing lug 25 comprises a bearing lug body 251 and a first projection 253 and a second projection 256 which are arranged on the bearing lug body 254, a groove 254 is arranged between the first projection 253 and the second projection 256, and an elastic member hole 255 for accommodating the elastic member 26 is arranged in the bearing lug body 251 at a position corresponding to the groove 254. The elastic member 26 is fitted into the elastic member hole 255, and the pin 27 passes through the core hole 233 and the groove 254 in this order, so that one end of the elastic member 26 abuts against the bottom surface of the elastic member hole 255 and the other end abuts against the pin 27, whereby the elastic member 26 is fixed in the elastic member hole 255 by the pin 27.

in one example, the resilient member 26 is a spring. The spring is placed in the elastic member hole 255 in the lengthwise direction of the elastic member hole 255, and the spring is in a contracted state. When the load bearing lugs 25 are installed in the collet 23, the load bearing lugs 25 project outwardly from the outer surface of the collet 23 and ride on the ramp 551 of the pilot sub 55 (described in more detail below) of a packer (e.g., a top packer). It will be appreciated by those skilled in the art that the elastic member may be other existing members having elastic deformation besides a spring, and this example is only an illustrative example, and those skilled in the art should not be construed as a limitation to the present invention.

The bottom end of the load-bearing lug body has an inner boss 252 and an outer boss 252' projecting from the inner and outer surfaces of the load-bearing lug body, respectively. Accordingly, an annular groove 234 is provided on the inner wall of the collet body 235 at a position corresponding to the plurality of lug grooves 232. In the assembled state, the bearing lug body 251 is received in the lug groove 232, the inner and outer bosses 252, 252' abut against the inner wall of the annular groove 234, and the first and second projections 253, 256 project beyond the outer surface of the collet body 235.

In one example, one skilled in the art can design the curvature of the inner and outer surfaces of the load-bearing lug body 251 to be the same as the curvature of the inner surface of the lug well 232. That is, in the fitting state, when the bearing lug 25 is fitted in the lug groove 232, the circular arc surfaces of the bearing lug body 251 are fitted with the circular arc inner surfaces of the lug groove 232, and the circular arc surfaces of the inner boss 252 and the outer boss 252' of the bearing lug body 251 are fitted with the circular arc inner surfaces of the annular groove 234. In one example, the annular groove 234 is wider than the lug groove 232, and the lug groove 232 opens into the annular groove 234, with the other side of the lug groove 234 opening into the outer surface of the collet 23.

referring to fig. 1a, the head 237 of each elastic claw 236 of the elastic collet 23 is sleeved in a bearing annular groove at the lower end of the piston extension cylinder 16, and the bearing annular groove is arranged along the circumferential direction of the piston extension cylinder 16, so that the bearing assembly is movably connected with the setting device.

as shown in fig. 1a, a shear release sleeve 29 is sleeved on the setting mandrel 17 below the bearing component, a shear jacket 24 is arranged above the shear release sleeve 29, and the shear jacket 24 is sleeved on the setting mandrel 17. One end of the shear release sleeve 29 close to the shear sleeve 24 extends into the inner cavity of the shear sleeve 24 and is fixedly connected with the setting mandrel 17 through a set screw 28 and is fixedly connected with the shear sleeve 24 through the set screw 28.

Referring to fig. 1a-b, the guide joint 55 is disposed at the top end of the packer, the lower end of the guide joint 55 is in contact with the outer surface of the setting sliding sleeve 21, the middle part of the guide joint is located below the setting sliding sleeve 21 and above the setting sleeve 57, the middle part protrudes inwards in the radial direction of the guide joint 55 to form a slope 551, the slope 551 of the guide joint 55 abuts against the inner surfaces of the first and second protrusions 253 and 256 of the bearing lug 25 of the bearing assembly, the inner surface of the lower end of the guide joint 55 and the outer surface of the upper end of the setting sleeve 57 are connected by a thread pair and a set screw 56, and the upper end of the setting sleeve 57 abuts against the outer surfaces of the first and second protrusions 253 and 256, i.e. the first and second protrusions 253 and 256 are received around an annular groove 88 formed at the upper ends of the guide joint 55 and the setting sleeve 57 (i.e. the end of the setting sleeve close to the piston extension 16) And (4) the following steps. The outer surface of the lower end (i.e., the end opposite to the upper end) of the seating sleeve 57 is coupled to the inner surface of a rubber upper seat 61 (described in detail below) by a screw pair.

As shown in connection with fig. 1b and fig. 8-10, the release pawl 36 is sleeved on the setting mandrel 17 in the setting sleeve 57 and the shearing pawl 33 is sleeved on the release pawl 36. Referring to fig. 8, the inner cavity of the shear pawl 33 is circumferentially provided with internal splines 331 and internal spline grooves 332 at intervals, the outer surface of the shear pawl 33 is circumferentially provided with external splines 333 at intervals, and two long pin holes 335 arranged opposite to each other pass through the outer surface of the shear pawl 33 to communicate with the inner cavity of the shear pawl 33. The surface of the inner cavity of the release pawl 36 is provided with internal splines 361 at intervals along the circumferential direction, the outer surface of the release pawl 36 is provided with external splines 363 and external spline grooves 364, and the outer surface of the release pawl 36 is further provided with short pin holes 365 and long pin holes 366 which are communicated with the inner cavity.

As shown in connection with fig. 1b and 10, the arrangement of the splined grooves 172 on the setting mandrel 17 mating with the internal splines 361 on the release pawl 36, the external splines 363 on the release pawl 36 mating with the internal splined grooves 332 of the shear pawl 33, and the external splined grooves 364 on the release pawl 36 mating with the internal splines 331 of the shear pawl 33, the external splines 333 of the shear pawl mating with the splined grooves 581 of the upper sub (described in detail below), then connecting the short pin hole 365 of the release pawl 36 with the short pin hole 173 of the mandrel 17 by the short brass pin 35, and connecting the long pin hole 335 of the shear pawl 33 with the long pin hole 366 of the release pawl 36 by the long brass pin 34 facilitates torque transfer.

As shown in fig. 11, spline grooves 581 are provided at intervals in the circumferential direction on the end surface of the upper end of the upper nipple 58, and a plurality of water passage holes 583 and a plurality of screw holes 584 are provided at the other end, the plurality of water passage holes being provided at intervals in the circumferential direction of the upper nipple 58, and a releasing thread 582 is further provided on the outer surface of the upper nipple 58. In one example, the releasing thread 582 is a left-handed thread. It will be appreciated by those skilled in the art that the present example is merely an illustrative example and that those skilled in the art may select, for example, right-hand threads as desired.

Referring to fig. 1b, the upper end of the positioning nipple 37 is sleeved on the setting mandrel 17 and is located below the shear release sleeve 29. The setting mandrel 17 is connected to a setting nipple 37 by means of a thread pair and a set screw 38, between which an O-ring 39 is provided for a sealed connection.

Referring to fig. 1b and 12-15, a locking piece supporting sleeve 30, a threaded locking piece 43 and a locking piece spring 31 are arranged in the positioning short piece 37. The threaded locking piece 43 is fitted over the locking piece support sleeve 30 and the locking piece spring 31 is received in the cavity between the locking piece support sleeve 30 and the threaded locking piece 43. In one example, the cross-sectional shape of the lock piece spring 31 is provided in an S-shape.

a plurality of annular top surfaces 301 and a plurality of annular support grooves 302 are arranged on the outer surface of the lock piece support sleeve 30 along the longitudinal direction, the plurality of annular top surfaces 301 and the plurality of annular support grooves 302 are alternately arranged, each annular top surface 301 of the plurality of annular top surfaces 301 is arranged along the circumferential direction of the lock piece support sleeve 30, and each annular support groove 302 of the plurality of annular support grooves 302 is arranged along the circumferential direction of the lock piece support sleeve 30. And a left-handed external thread 431 is arranged on the outer surface of the thread locking block 43 and is in matched connection with the upper nipple releasing thread 582. It will be understood by those skilled in the art that the left-hand external thread 431 and the releasing thread 582 are of the same type and pitch.

in one example, the cross-sectional shape of the profile of the external thread 431 is trapezoidal. The threaded lock 43 is further provided with 3 annular top surfaces 432, 2 lock annular grooves 433, a cut 434 and a reed hole 435. The 3 annular top surfaces 432 and 2 locking piece annular grooves are alternately arranged on the surface of the inner cavity of the threaded locking piece 43 along the longitudinal direction of the threaded locking piece, each annular top surface 432 of the 3 annular top surfaces 432 is arranged along the circumferential direction of the threaded locking piece 43, and each locking piece annular groove 433 of the 2 locking piece annular grooves 433 is arranged along the circumferential direction of the threaded locking piece 43.

The reed hole 435 is located on the 2 nd annular top surface 432 of the middle of the screw lock 43, and the cutting groove 434 extends from the 1 st annular top surface of the screw lock 43 (i.e., near one end of the shear release sleeve 29) into the reed hole 435 in the longitudinal direction of the screw lock. As shown in fig. 14, the screw lock 43 is turned first during machining, then cut into 4 pieces, marked in the order shown, and assembled in the order of the marks during installation. It will be appreciated by those skilled in the art that the number of annular top surfaces and/or annular grooves on the threaded locking block may be selected accordingly as desired and may be provided in the range of 4, 5 or more.

As shown in fig. 16, the positioning sub 37 is provided with a plurality of rectangular grooves 371, a plurality of second thrower pin holes 372, and a plurality of water passing grooves 373. The plurality of rectangular grooves 371 are arranged at one end, close to the lock block supporting sleeve 30, of the positioning short section 37 at intervals along the circumferential direction of the positioning short section 37, a plurality of second releasing pin holes 372 are arranged below the plurality of rectangular grooves 371, and a plurality of water passing grooves 373 are arranged below the plurality of second releasing pin holes 372 at intervals along the circumferential direction of the positioning short section 37.

when assembling, the annular top surface 301 of the lock piece supporting sleeve 30 corresponds to the annular top surface 432 of the threaded lock piece 43, the supporting sleeve annular groove 302 of the lock piece supporting sleeve 30 and the lock piece annular groove 433 of the threaded lock piece 43 correspond to each other, one end of the lock piece spring 31 is inserted into the spring hole 435 of the threaded lock piece, and the other end passes through the cutting groove 433 and is pressed at the upper end (i.e. the end close to the shearing release sleeve) of the lock piece supporting sleeve 30; second releasing pin 32 passes through second releasing pin hole 372 of spud 37 and second releasing pin hole 303 provided on the end of lock block support sleeve 30 adjacent to spud 37.

Referring to fig. 1b, one end of the positioning nipple 37 is connected to the setting mandrel 17, and the other end is connected to the ball seat nipple 44 through a thread pair and a set screw 42, and an O-ring 40 is further arranged between the two. The outer surface of the upper end of the ball seat short section 44 is connected with the inner surface of the positioning short section 37, the lower end of the ball seat short section is connected with the outer surface of the upper end of the inner washing pipe sleeve 49 through a thread pair and a set screw 46, and an O-shaped ring 45 is arranged between the two for sealing connection. The inner surface of the lower end of the inner washpipe sleeve 49 is connected with the outer surface of the upper end of the sealing mandrel 52 through a thread pair.

the sealing mandrel 52 is provided with a sealing ring assembly 50 and an O-shaped ring 51 on the outer surface, and the sealing mandrel 52 is provided with top circulation holes 521 at intervals along the circumferential direction, which are used for establishing a circulation channel in the subsequent sand control operation process. The lower end of the sealing mandrel 52 is connected with the inner surface of the upper end of an outer washing pipe nipple 54 through a thread pair, and an O-shaped ring 53 is arranged between the sealing mandrel and the outer washing pipe nipple. The lower end of the outer wash pipe nipple 54 (i.e. the end remote from the end to which the sealing mandrel 52 is connected) is provided with a wash pipe thread pair for connection to a standard wash pipe.

with continued reference to figure 1b, the inner washpipe nipple 48 is sleeved within an inner washpipe sleeve 49 with an O-ring 47 therebetween for sealing engagement. The lower end of the inner wash pipe sub 48 (i.e. the end to which the sealing mandrel 52 is attached) is provided with wash pipe threads to facilitate connection to a standard wash pipe. An outer surface of the upper end of the inner wash pipe sub 48 (i.e. the end adjacent the ball seat sub 44) projects outwardly in a radial direction to form a rotational shoulder 481. In use, a swivel shoulder 481 may be suspended at the upper end of the sealing mandrel 52 (i.e. the end adjacent the inner casing 49) and serves to allow free rotation when the lower end of the inner washpipe sub 48 and its lower washpipe string are connected to a standard washpipe in the well without having to rotate the standard washpipe in the well or the entire packer and setting device which is heavy.

As shown in fig. 1b, the packer mandrel 60 passes through the inner cavities of the upper packer seat 61, the inner packer 67, the upper cone 72, the slips 76, the guide ring 77, the lower cone 79, the stop sleeve 81, and the switch sleeve 83 in this order. The upper end of the packer mandrel 60 is connected to the upper sub 58 by a threaded pair. As shown in fig. 1b and 17-19, the surface of the inner cavity of the packer mandrel 60 is provided with a sealing surface 601, and the outer surface is provided with a double-start locking thread 602, a split ring thread 603, a key groove 604 and a load-bearing ring thread 605 in this order from top to bottom (i.e., along the longitudinal direction of the packer mandrel 60). Wherein, the thread form angle of the double-end locking thread 602 is an oblique triangle structure (as shown in fig. 18). The keyways 604 are spaced along the circumference of the packer mandrel 60.

A wave spring seat 62, a wave spring 63 and a locking ring 65 are sequentially sleeved on the outer surface of a packer mandrel 60 in a rubber sleeve upper seat 61 from top to bottom (namely along the longitudinal direction of a pipe column), and an anti-rotation pin 59 is inserted into a screw hole 584 of an upper pup joint 58 through a long groove of a seat sleeve 57. In one example, the locking ring 65 is a split ring having locking threads on its inner surface (as shown in FIG. 19) that mate with the double start locking threads 602, and having a profile angle that is the same as the profile angle of the double start locking threads 602 (as shown in FIG. 18), which is a single start thread having a pitch that is 2 times the pitch of the double start locking threads 602. Referring to fig. 1b, the inner surface of the upper seat 61 of the rubber cylinder is provided with internal threads which are matched with the external threads of the locking ring 65, and the thread form angle of the upper seat is trapezoidal threads. The anti-rotation pin 64 fixedly connects the upper rubber sleeve seat 61 and the lock ring 65.

an inner rubber cylinder 67 is sleeved on the packer mandrel 60 below the rubber cylinder upper seat 61. The two ends of the inner rubber tube 67 are both sleeved with an outer rubber tube 68 and a rubber tube guide shoe 66, and the rubber tube guide shoe 66 is arranged on the outer side of the outer rubber tube 68. The push ring 70 and the upper cone 72 are sequentially sleeved on the packer mandrel 60 below the rubber barrel guide shoe 66, an upper cone split ring 74 is also accommodated in a cavity between the upper cone 72 and the packer mandrel 60, the upper cone split ring 74 is matched with a split ring thread 603 of the packer mandrel 60 through internal threads, and the upper cone 72 is fixedly connected with the upper cone split ring 74 through a split ring pin 73. The lower rubber sleeve seat 69 is sleeved on the push ring 70 and is connected with the lower rubber sleeve seat 69 through a push ring pin 71, then extends downwards along the longitudinal direction of the pipe column and is connected with the outer surface of one end of an upper cone 72 through a thread pair, and the other end of the upper cone 72 extends out of the lower rubber sleeve seat 69 and is sleeved on the packer mandrel 60.

as shown in connection with fig. 1b and 20, slips 76 are sleeved on the packer mandrel 60 below the upper cone 72 and are connected to the upper cone 72 by slip pins 75. The slip 76 is unitary and has a pin hole 761, an annular cusp 762, left slots 763, right slots 764 alternating with each other, the left slots 763 extending partially from a left end (i.e., left side in the page) to a right end (i.e., right side in the page) of the slip 76, and the right slots 764 extending partially from the right end to the left end of the slip 76. Tapered surfaces 765 are provided at both ends. The annular cusps 762 are respectively provided on the outer surfaces of both ends of the slip 76, and the sectional shape of the annular cusps 762 is a corrugated shape. The annular cusp 762 is divided into a plurality of cusp segments by the left incised slots 763, and the pin holes 761 are provided on the cusp segments between the adjacent left incised slots 763. The slips are connected to the upper cone 72 through the pin holes 761. The inner surface of each cusp segment is provided with a tapered surface 765 having a thickness gradually decreasing toward the tip.

As shown in fig. 1b and 21, the guide ring 77 fits over the packer mandrel 60. The guide ring 77 is provided with screw holes 771, splines 772, and a guide ring body. A plurality of splines 772 are provided on the outer surface of the guide ring body at intervals in the circumferential direction of the guide ring body and are protruded in the axial direction of the guide ring body, and one screw hole 771 is provided on each spline 772. Set screw 78 passes through screw hole 771 to secure guide ring 77 to packer mandrel 60 and spline 772 fits within right slot 764 of slip 76 and guides slip 76 as it moves.

The packer mandrel 60 below the slips 76 is sleeved with a lower cone 79, the upper end of the lower cone 79 is in contact with a conical surface 765 at one end of the slips 76, and the lower end of the lower cone 79 is provided with a lower cone key groove 791 matched with the key groove 604 of the packer mandrel 60. The mandrel lock block 80 is received in the keyway 604 of the packer mandrel 60 and the lower cone keyway 791 for transmitting torque and preventing the lower cone 79 from rotating on the packer mandrel 60. The upper end of the stop sleeve 81 is in threaded connection with the outer surface of the lower cone 79, the lower end is in threaded connection with the inner surface of the upper end of the outer packer cylinder 82, and the inner surface of the lower end of the outer packer cylinder 82 is in threaded connection with the bottom connector 87.

As shown in fig. 22, a bearing ring 84 is disposed in the inner cavity of the packer outer cylinder 82 and sleeved on the packer mandrel 60, the bearing ring 84 is provided with internal threads 841, an annular top surface 842, a bearing ring annular groove 843, right slots 844 and left slots 845. The internal threads 841 of the load ring 84 are matingly engaged with the load ring threads 605 of the packer mandrel. The annular top surfaces 842 and the annular bearing groove 843 are alternately arranged on the outer surface of the bearing ring 84 along the lengthwise direction of the bearing ring 84, the annular top surfaces 842 are arranged along the circumferential direction of the bearing ring 84, and the annular bearing groove 843 is arranged along the circumferential direction of the bearing ring 84. The left slots 845 and the right slots 844 of the carrier ring 84 are alternately arranged with each other, the left slots 845 extend from the upper end of the carrier ring to the lower end portion of the carrier ring in the lengthwise direction of the carrier ring 84, and the right slots 844 extend from the lower end of the carrier ring to the upper end portion of the carrier ring in the lengthwise direction of the carrier ring 84.

As shown in fig. 1c and 23, a switch sleeve 83 is sleeved inside the packer outer cylinder 82 and outside the load ring 84. The switch sleeve 83 is provided with a water through hole 831, a water through groove 832, an annular top surface 833, a switch sleeve annular groove 834 and an unsealing shoulder 835. The plurality of water passage holes 831 are arranged on the outer surface of the opening/closing cover 83 in the circumferential direction of the opening/closing cover 83, and the plurality of water passage grooves 832 are provided at intervals from each other in the circumferential direction of the opening/closing cover 83, the plurality of water passage holes 831 being communicated with the corresponding water passage grooves 832, respectively.

An annular top surface 833 of the switch sleeve 83, which annular top surface 833 corresponds to the annular top surface 842 of the carrier ring 84, and a switch ring circular groove 834 are provided on the inner surface of one end of the switch sleeve 83 and are spaced apart from each other. The inner surface of the other end of the switch sleeve 83 protrudes inward in the radial direction of the switch sleeve to form an unsealing step 835. An O-shaped ring 85 is arranged between the switch sleeve 83 and the packer mandrel 60 as well as between the switch sleeve and the bottom joint 87, and is connected with the packer outer cylinder 82 through a lower unsealing end 86.

The concrete structure of the bearing assembly and the pipe column provided by the invention is further explained by detailed description of the working principle of the bearing assembly and the pipe column.

with reference to fig. 1 a-23, first, the packer, setting device and carrier assembly are assembled at the surface, and those skilled in the art will understand that the packer and setting device used herein may be an existing packer and setting device, and of course, the packer and setting device provided by the present invention may also be used. Then, other tools are connected and put into the well, when the inner washing pipe nipple 48 and the washing pipe below the inner washing pipe nipple (the packer, the setting device and the bearing component are assembled on the ground and then connected with other tools and put into the well, the "washing pipe" is a part of other tools) and the washing pipe which is put into the well in advance (the washing pipe which is put into the well in advance is a part of the sand control pipe column and is connected with the "washing pipe below the" well head) are buckled and connected on the well head, the inner washing pipe nipple 48 and the washing pipe below the inner washing pipe nipple can rotate without rotating the well washing pipe with large weight or the whole packer and the setting device.

If the pipe column is blocked in the process of running the pipe column, the pipe column can be rotated forwards to be relieved, and the way of transmitting the torque is as follows: the upper joint 2, the setting short section 5, the flat key 11, the setting mandrel 17, the release pawl 36, the shearing pawl 33, the upper short section 58, the packer mandrel 60, the mandrel locking block 80, the lower cone 79, the stop sleeve 81, the packer outer cylinder 82 and the bottom joint 87 are sequentially driven by the rotation of the drill rod.

during running of the pipe string, the weight of the guide sub 55, the setting sleeve 57 and the upper rubber sleeve seat 61 is suspended on the bearing lug 25 through the inclined surface 551 of the guide sub 55, and the bearing lug 25 has stronger bearing capacity than a common pin, so that the upper rubber sleeve seat 61 does not move relative to the mandrel 60 of the packer even if the weight needs to be lifted or pressed down after being blocked, and the anti-lifting setting capacity is strong.

After the sand control string is put in place, a setting ball 41 is thrown in from the wellhead, is pressed into the upper connector 2 through a drill rod (not shown), pushes the piston 13 and the piston extension cylinder 16 to move downwards through the pressure transmission hole 51, the initial setting pin 22 is sheared, and the elastic collet 23 is released; the piston extension cylinder 16 drives the setting sliding sleeve 21 to move downwards through the releasing pin 20, the guide joint 55, the setting sleeve 57, the elastic chuck 23, the bearing lug 25, the spring 26 and the pin 27 are pushed to move downwards, the bearing lug slides down from the step of the setting mandrel 17, and contracts inwards under the action of the spring 26 to be separated from the inclined plane 551 of the guide joint; the collet 23 then pushes the shear sleeve 24 so that the shear screw 28 is sheared.

and (2) continuously pressing the pipe column, wherein the setting sleeve 57 pushes the rubber sleeve upper seat 61 and the wave spring 63, the wave spring seat 62 and the lock ring 65 inside the rubber sleeve upper seat to move downwards, and due to the triangular tooth structure of the core shaft threads of the packer and the internal threads of the lock ring, the lock ring 65 cannot move back after moving downwards along the double-head locking threads 602 of the core shaft 60 of the packer, so that a locking effect is generated. The rubber cylinder upper seat 61 pushes the rubber cylinder guide shoe 66, the outer rubber cylinder 68, the inner rubber cylinder 67, the rubber cylinder lower seat 69 and the upper cone 72 downwards in sequence, the split ring pin 73 and the slip pin 75 are cut off, the slip 76 is pushed by the upper cone 72, the conical surface 765 moves along the inclined surface of the lower cone under the guidance of the guide ring 77, the annular tooth tip 762 is clamped on the inner wall of the sleeve to form anchoring, the outer rubber cylinder 68 and the inner rubber cylinder 67 are compressed to seal the annular space between the inner wall of the sleeve and the top packer, so that setting is completed, and at the moment, the guide joint 55 and the setting sliding sleeve 21 cannot move downwards any more.

The setting sleeve 21 can not move downwards any more, so the releasing pin 20 is sheared off, the piston extension barrel 16 pushes the elastic collet 23, the shearing release sleeve 29 and the release pawl 36 downwards continuously, and the brass long pin 34 and the brass short pin 35 are sheared off.

The release pawl pushes the lock block supporting sleeve 30 downwards to move, the second releasing pin 32 is cut off, the annular top surface 301 of the lock block supporting sleeve 30 is changed from corresponding to the annular top surface 432 of the threaded lock block 43 to corresponding to the annular groove 433, the threaded lock block 43 loses internal support and contracts inwards under the action of the lock block spring leaf 31, the external thread 431 of the threaded lock block is separated from the releasing thread 582 of the upper short section, and therefore the pressing releasing and releasing are achieved. If the thread locking block 43 cannot contract inwards for causing failure of pressure releasing due to special reasons, the tubular column can be rotated forwards, and the external thread 431 of the thread locking block and the releasing thread 582 of the upper short section are both left-handed threads to be separated, so that releasing of the tubular column in forward rotation is realized.

when the packer (such as a top packer) needs to be unset, a special unset tool is put in, the unset tool is clamped on the unset shoulder 835 of the switch sleeve, the unset tool is lifted, the unset pin 86 is sheared, the annular top surface 833 of the switch sleeve 83 changes from corresponding to the annular top surface 842 of the bearing ring 84 to corresponding to the annular groove 843, the bearing ring loses external restraint, the inner thread 841 is disengaged from the mandrel bearing ring thread 605 under the action of the right cutting groove 844 and the left cutting groove 845, the lower cone 79 is released, and the slips 76 shrink to realize unset.

(2) the bearing component for the tubular column and the tubular column provided by the utility model have the function of transmitting torque, and if the tubular column meets resistance in the process of running the tubular column, the tubular column can rotate positively (namely rotate clockwise) to remove the resistance;

although a few embodiments of the present general inventive concept have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.

Claims

1. A load bearing assembly for a pipe string, wherein the pipe string comprises a setting device and a packer,

The setting device is connected with the packer through the bearing assembly, the bearing assembly comprises an elastic chuck, a bearing lug, a pin shaft and an elastic component, the elastic chuck comprises an elastic chuck body and a plurality of elastic claws which are connected with each other, a plurality of lug grooves used for containing the elastic lugs are arranged on the elastic chuck body, a mandrel hole penetrating through the lug grooves is arranged on the elastic chuck body along the circumferential direction of the elastic chuck body,

2. The load bearing assembly for a pipe string of claim 1,

The elastic chuck main body is annular, a plurality of lug grooves are arranged at intervals along the circumferential direction of the elastic chuck main body,

3. The load bearing assembly for a pipe string of claim 2,

The collet body has a main part inner chamber, each elastic claw in a plurality of elastic claws includes claw head and the claw body, the one end of the claw body with the claw head is connected, and the other end sets up on the collet body.

4. The load bearing assembly for a pipe string of claim 3,

a bearing annular groove for accommodating the claw head of each elastic claw is arranged at one end of the setting device close to the packer along the circumferential direction of the setting device,

5. The load bearing assembly for a pipe string of claim 4,

the bottom end of the load-bearing lug body has inner and outer bosses projecting from the inner and outer surfaces of the load-bearing lug body respectively,

6. the load bearing assembly for a pipe string of claim 1,

In the assembled state, the first protrusion and the second protrusion protrude from the outer surface of the elastic chuck main body,

the elastic member is a spring.

7. A pipe column is characterized in that a pipe column body is provided with a pipe column body,

the tubular string comprising the load bearing assembly of any of claims 1-6, a setting device, and a packer,

The upper joint is connected with the upper end of the setting short section and then sleeved on the protective sleeve, the outer surface of the lower end of the setting short section is connected with the separating ring and the inner surface of the piston outer barrel arranged below the separating ring, the upper end of the piston outer barrel is sleeved with the outer barrel pressing cap, the inner surface of the lower end of the setting short section is connected with the upper end of the setting mandrel, the setting mandrel is sequentially sleeved with the piston and a piston extending barrel, the upper ends of the piston and the piston extending barrel are accommodated in the piston outer barrel, the sliding sleeve pressing cap and the setting sliding sleeve are sleeved at the lower end of the piston extending barrel, the lower end of the piston extending barrel is sleeved on the elastic claws of the elastic chucks in the bearing assembly, the bearing assembly is sleeved on the setting mandrel, and a bearing annular groove is arranged on the inner surface of the lower end of the piston extending barrel along the circumferential direction of the piston extending barrel, the top of packer supports and leans on bear on the first lug of lug and the second lug seat seal spindle of below of carrier assembly is equipped with in proper order the cover is equipped with cut overcoat, shearing release cover, release pawl, locking piece support cover and location nipple joint, it establishes to cut the pawl cover on the release pawl, the lower pot head of location nipple joint is established ball seat nipple joint upper end, just the lower pot head of ball seat nipple joint is established on the surface of interior towards sheathed tube upper end, interior towards sheathed tube lower extreme with set up the love seal ring assembly cover of interior towards sleeve tube below establishes the upper end of sealed dabber, just interior towards the sleeve pipe with the internal surface of sealed dabber with the surface connection of interior towards pipe nipple joint, the surface of sealed dabber lower extreme with the internal surface connection of outer towards pipe nipple joint.

8. the pipe string of claim 7,

The locking piece supporting sleeve is sleeved on the setting core shaft, the lower end of the locking piece supporting sleeve is accommodated in an inner cavity at the upper end of the positioning short section, a threaded locking piece is sleeved on the locking piece supporting sleeve, and a locking piece reed is arranged in an inner cavity between the locking piece supporting sleeve and the threaded locking piece.

9. the pipe string of claim 8,

The packer comprises a guide joint, a seat sleeve, an upper short section, a packer mandrel, a rubber barrel upper seat, a wave spring, a lock ring, a rubber barrel guide shoe, an inner rubber barrel, an outer rubber barrel, a rubber barrel lower seat, a push ring, an upper cone, a slip, a guide ring, a lower cone, a mandrel lock block, a stop sleeve, a packer outer barrel, a switch sleeve, a bearing ring and a bottom joint,

the inner surface of the upper end of the guide joint is in contact with the outer surface of the setting sliding sleeve, the inner surface of the lower end of the guide joint is connected with the upper end of the setting sleeve, the inner surface between the upper end and the lower end of the guide joint protrudes inwards along the radial direction to form an inclined surface, the inclined surface and the upper end of the setting sleeve surround each other to form a packer annular groove, and the first bulge and the second bulge of the bearing lug in the bearing assembly are accommodated in the packer annular groove,

10. the pipe string of claim 9,

The lower end of the setting core shaft is provided with a first spline groove,

11. The pipe string of claim 10,

The positioning short section is provided with a plurality of rectangular grooves and a plurality of water through grooves, the rectangular grooves are arranged at the upper end of the positioning short section and are arranged at intervals along the circumferential direction, and the water through grooves are arranged below the rectangular grooves and are arranged at intervals along the circumferential direction.

12. The pipe string of claim 11,

The outer surface of the locking piece supporting sleeve is provided with a plurality of first annular top surfaces and a plurality of supporting sleeve annular grooves along the longitudinal direction, the plurality of annular top surfaces and the plurality of supporting sleeve annular grooves are alternately arranged, each first annular top surface of the plurality of first annular top surfaces is arranged along the circumferential direction of the locking piece supporting sleeve, and each supporting sleeve annular groove of the plurality of supporting sleeve annular grooves is arranged along the circumferential direction of the locking piece supporting sleeve.

13. the pipe string of claim 12,

the threaded locking block is connected with the inner surface of the upper short section through a thread pair, a plurality of second annular top surfaces, a plurality of locking block annular grooves, a cutting groove and a reed hole are arranged on the inner surface of the threaded locking block, the plurality of second annular top surfaces and the plurality of locking block annular grooves are alternately arranged along the lengthwise direction of the threaded locking block, each second annular top surface in the plurality of second annular top surfaces is arranged along the circumferential direction of the threaded locking block, each locking block annular groove in the plurality of locking block annular grooves is arranged along the circumferential direction of the threaded locking block,

14. the pipe string of claim 13,

a first annular top surface in the locking piece supporting sleeve and a second annular top surface in the threaded locking piece correspond to each other, and a supporting sleeve annular groove of the locking piece supporting sleeve and a locking piece annular groove of the threaded locking piece correspond to each other,

15. the pipe string of claim 14,

The slip is provided with annular crests, first left and right cutting grooves alternately arranged with each other, the first left cutting grooves extending from a first end of the slip to a second end portion disposed opposite the first end, and the first right cutting grooves extending from the second end of the slip to the first end portion, the annular crests being disposed on outer surfaces of the first and second ends of the slip, respectively.

16. the pipe string of claim 15,

The slip is further provided with a pin hole, the annular cusp is divided into a plurality of cusp segments by the first left cutting groove, the pin hole is formed in the cusp segment between the adjacent first left cutting grooves, the slip is connected with the upper cone body through the pin hole, a conical surface with the thickness gradually reduced towards the end part is arranged on the inner surface of each cusp segment in the plurality of cusp segments,

The slips are integrally formed, and the section of the annular tooth point is corrugated.

17. The pipe string of claim 15,

The bearing ring is provided with a third annular top surface, a bearing ring annular groove, a second right cutting groove and a second left cutting groove, the third annular top surface and the bearing ring annular groove are alternately arranged on the outer surface of the bearing ring along the lengthwise direction of the bearing ring, the third annular top surface is arranged along the circumferential direction of the bearing ring, and the bearing ring annular groove is arranged along the circumferential direction of the bearing ring,

18. The pipe string of claim 17,

The switch sleeve is provided with a plurality of water through holes, water through grooves, a fourth annular top surface, a switch sleeve annular groove and an unsealing step in a sleeved mode, the plurality of water through holes are arranged on the outer surface of the switch sleeve along the circumferential direction of the switch sleeve, the plurality of water through grooves are arranged at intervals along the circumferential direction of the switch sleeve, the plurality of water through holes are respectively communicated with the corresponding water through grooves in the plurality of water through grooves, the plurality of water through holes are located at the upper ends of the plurality of water through grooves and are perpendicular to the plurality of water through grooves,