CN109653695B - Bearing assembly for tubular column and tubular column - Google Patents
Bearing assembly for tubular column and tubular column Download PDFInfo
- Publication number
- CN109653695B CN109653695B CN201910121912.7A CN201910121912A CN109653695B CN 109653695 B CN109653695 B CN 109653695B CN 201910121912 A CN201910121912 A CN 201910121912A CN 109653695 B CN109653695 B CN 109653695B
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- sleeve
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- setting
- packer
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- 210000000078 claw Anatomy 0.000 claims abstract description 40
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 210000002445 nipple Anatomy 0.000 claims description 95
- 238000007789 sealing Methods 0.000 claims description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 238000011010 flushing procedure Methods 0.000 claims description 25
- 238000003825 pressing Methods 0.000 claims description 25
- 235000014676 Phragmites communis Nutrition 0.000 claims description 24
- 238000005520 cutting process Methods 0.000 claims description 21
- 238000010008 shearing Methods 0.000 claims description 20
- 230000001681 protective effect Effects 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000004080 punching Methods 0.000 claims 5
- 239000004576 sand Substances 0.000 abstract description 34
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 4
- 239000003345 natural gas Substances 0.000 abstract description 2
- 239000003209 petroleum derivative Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 17
- 238000012856 packing Methods 0.000 description 17
- 230000002265 prevention Effects 0.000 description 11
- 230000005540 biological transmission Effects 0.000 description 5
- 229910001369 Brass Inorganic materials 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 4
- 239000010951 brass Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 150000002430 hydrocarbons Chemical class 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000009933 burial Methods 0.000 description 2
- POIUWJQBRNEFGX-XAMSXPGMSA-N cathelicidin Chemical compound C([C@@H](C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CO)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H]([C@@H](C)CC)C(=O)NCC(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](C(C)C)C(=O)N1[C@@H](CCC1)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CO)C(O)=O)NC(=O)[C@H](CC=1C=CC=CC=1)NC(=O)[C@H](CC(O)=O)NC(=O)CNC(=O)[C@H](CC(C)C)NC(=O)[C@@H](N)CC(C)C)C1=CC=CC=C1 POIUWJQBRNEFGX-XAMSXPGMSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Classifications
-
- 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
- E21B23/06—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for setting packers
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
- E21B33/1293—Packers; Plugs with mechanical slips for hooking into the casing with means for anchoring against downward and upward movement
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/04—Gravelling of wells
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a bearing assembly for a pipe column and the pipe column, and belongs to the field of sand control completion of petroleum and natural gas. The pipe column comprises a setting device and a packer, wherein the setting device and the packer are connected through a bearing assembly, the bearing assembly comprises an elastic chuck body and a plurality of elastic claws, the elastic chuck body is connected with the elastic chuck body, the elastic chuck body is provided with a plurality of lug grooves for accommodating the elastic lugs, mandrel holes penetrating through the lug grooves are axially formed in the elastic chuck body, the bearing lugs comprise a bearing lug body and first protrusions and second protrusions arranged on the bearing lug body, grooves are formed between the first protrusions and the second protrusions, elastic member holes for accommodating the elastic members are formed in positions corresponding to the grooves in the bearing lug body, the pins sequentially penetrate through the mandrel holes and the grooves, and one ends of the elastic members are abutted against the pins.
Description
Technical Field
The invention relates to the field of sand control completion of petroleum and natural gas, in particular to a bearing assembly for a pipe column and the pipe column.
Background
Loose sandstone hydrocarbon reservoirs are widely distributed worldwide, and the hydrocarbon reservoirs are easy to produce sand in the production process due to shallow burial and loose cementation. Currently, sand control treatments can be performed in 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 pipe by a ground sand control pump, and then enters the annular space and perforation tunnels of a screen pipe and a sleeve through a selective conversion tool until the whole sand control section is covered, and sand-carrying fluid returns to the ground through the screen pipe or enters a stratum along with the gravel. And after the simple sand prevention is carried out on the sand prevention pipe column, stratum sand is blocked outside the screen pipe by means of the screen pipe on the sand prevention pipe column, mortar filling is not needed, and the sand prevention pipe is simpler.
The top packer and its setting tool have the main functions of sealing the annular space between the casing and the sand preventing string and suspending the sand preventing completion string, and are one of the key tools in gravel packing and simple sand preventing technology.
At present, a small amount of public reports about a top packer for sand prevention and a setting tool thereof exist in the sand prevention field, and the problems that after a pipe column is unsealed, slips are easy to be clamped in the process of lifting the pipe column, torque cannot be transmitted in the process of putting the pipe column into the pipe column, release is difficult, and the setting is easy to advance exist.
Chinese patent publication No. CN104508234B discloses a top packer for sand control, whose slip device is a set of split slips. In use, it has been found that the slips are easily deflected to seize the casing during lifting after deblocking and cannot transmit torque during running.
Chinese patent publication No. CN205117260U discloses a hydraulic setting tool for preventing advanced setting. The tool is found to be unable to prevent the packer from being set up and down after encountering a blockage during use.
Chinese patent grant publication nos. CN204457577U and CN204457537U disclose a hydraulic removable sand control packer and a hydraulic release setting tool, respectively. In the above patent, the slip device is a group of split slips, and the slips are easy to deviate and clamp the sleeve in the lifting process after the deblocking; and torque cannot be transmitted during the running-in process. The anti-advance setting is realized by virtue of a shearing pin in the hydraulic removable sand control packer, but the anti-advance setting capability is poor because the shearing value of the pin is not suitable to be designed too high. In the process of using the hydraulic release setting tool, the release mode between the setting tool and the packer is annular pressurization, the drill rod is required to be switched to annular pressurization, and then the drill rod is switched to be pressurized to push down the bottom ball seat, so that the operation is complex, and wellhead equipment is easily limited by the bearing capacity when the annular pressurization is carried out.
Disclosure of Invention
In order to solve at least one of the above problems and disadvantages of the prior art, the present invention provides a load bearing assembly for a pipe string and a pipe string. The technical scheme is as follows:
it is an object of the present invention to provide a load bearing assembly for a tubular string.
It is another object of the present invention to provide a tubing string.
According to one aspect of the present invention, there is provided a load bearing assembly for a tubular 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 member, the elastic chuck comprises an elastic chuck main body and a plurality of elastic claws which are connected with each other, the elastic chuck main body is provided with a plurality of lug grooves for accommodating the elastic lugs, a mandrel hole penetrating through the lug grooves is arranged on the elastic chuck main body along the axial direction of the elastic chuck main 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 passes through the mandrel hole and the groove, one end of the elastic component is abutted 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 propped 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 circumference direction of the elastic chuck main body,
the elastic clamping head comprises a plurality of elastic jaws, wherein the elastic jaws are arranged along the circumferential direction of the elastic clamping head body, long grooves are formed between two adjacent elastic jaws in the plurality of elastic jaws, and the long grooves are arranged along the longitudinal direction of the plurality of elastic jaws.
Further, the elastic chuck main body is provided with a main body inner cavity, each elastic claw in the plurality of elastic claws comprises a claw head and a claw body, one end of the claw body is connected with the claw head, and the other end of the claw body is arranged on the elastic chuck main body.
In particular, a bearing annular groove for accommodating the claw head of each elastic claw is arranged at one end of the setting device, which is close to the packer, along the circumferential direction of the setting device,
and annular grooves are formed in positions, corresponding to the lug grooves, on the inner wall of the elastic chuck main body.
Specifically, the bottom end of the carrying lug body is provided with an inner boss and an outer boss which respectively protrude from the inner surface and the outer surface of the carrying lug body,
the bearing lug body is received in the lug well, and the inner boss and the outer boss are abutted against the inner wall of the annular groove.
Further, in the assembled state, the first protrusion and the second protrusion protrude from the outer surface of the collet body,
the elastic member is a spring.
According to another aspect of the present invention, there is provided a tubing string, wherein,
the pipe column comprises the bearing assembly, a setting device and a packer,
the setting device comprises an upper joint, a protective sleeve, a setting nipple, an outer cylinder pressing cap, a separating ring, a piston outer cylinder, a piston extending cylinder, a setting mandrel, a sliding sleeve pressing cap, a setting sliding sleeve, a shearing outer sleeve, a shearing releasing sleeve, a locking piece supporting sleeve, a locking piece reed, a shearing pawl, a releasing pawl, a positioning nipple, a ball seat nipple, an inner flushing nipple, a sealing ring assembly, a sealing mandrel and an outer flushing nipple,
the upper joint is sleeved on the protective sleeve after being connected with the upper end of the setting nipple, the outer surface of the lower end of the setting nipple is connected with the inner surface of the piston outer cylinder below the separating ring and the separating ring, the upper end of the piston outer cylinder is sleeved with the outer cylinder pressing cap, the inner surface of the lower end of the setting nipple is connected with the upper end of the setting mandrel, the setting mandrel is sequentially sleeved with the piston and the piston extension cylinder, the upper ends of the piston and the piston extension cylinder are accommodated in the piston outer cylinder, the lower ends of the sliding sleeve pressing cap and the setting nipple are sleeved on the plurality of elastic claws of the elastic chuck in the bearing assembly, the bearing assembly is sleeved on the setting mandrel, the bearing annular groove is arranged on the inner surface of the lower end of the piston extension cylinder along the circumferential direction of the piston extension cylinder, the top end of the packer is abutted against the first lug, the lower end of the sealing sleeve is sleeved with the sealing ring, the lower end of the sealing sleeve is sleeved with the sealing sleeve, the outer surface of the sealing sleeve is sleeved with the sealing sleeve, the sealing sleeve is sleeved with the sealing sleeve, the outer surface of the lower end of the sealing mandrel is connected with the inner surface of the outer flushing pipe nipple.
Specifically, the lower end of the setting mandrel is provided with a first spline groove,
the surface of the inner cavity of the shearing pawl is provided with a first internal spline and a first internal spline groove at intervals along the circumferential direction, the outer surface of the shearing pawl is provided with a first external spline at intervals along the circumferential direction,
the surface of the inner cavity of the release pawl is provided with second internal splines at intervals along the circumferential direction, the outer surface of the release pawl is provided with second external splines and second external spline grooves 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.
Further, be provided with a plurality of rectangular channels and a plurality of water through grooves on the location nipple, a plurality of rectangular channels set up the upper end of location nipple and along circumference direction interval arrangement each other, a plurality of water through grooves all set up the below of a plurality of rectangular channels and along circumference direction interval arrangement each other.
Specifically, the locking piece support sleeve is sleeved on the setting mandrel, the lower end of the locking piece support sleeve is accommodated in the inner cavity of the upper end of the positioning nipple, the locking piece support sleeve is sleeved with a threaded locking piece, and a locking piece reed is arranged in the inner cavity between the locking piece support sleeve and the threaded locking piece.
Specifically, a plurality of first annular top surfaces and a plurality of support collar grooves are arranged on the outer surface of the lock block support sleeve along the longitudinal direction, the plurality of annular top surfaces and the plurality of support collar grooves are alternately arranged with each other, each of the plurality of first annular top surfaces is arranged along the circumferential direction of the lock block support sleeve, and each of the plurality of support collar grooves is arranged along the circumferential direction of the lock block support sleeve.
Further, the screw thread locking piece is connected with the inner surface of the upper short joint through a screw thread pair, a plurality of second annular top surfaces, a plurality of locking piece annular grooves, cutting grooves and reed holes are arranged on the inner surface of the screw thread locking piece, the plurality of second annular top surfaces and the plurality of locking piece annular grooves are alternately arranged along the longitudinal direction of the screw thread locking piece, each of the plurality of second annular top surfaces is arranged along the circumferential direction of the screw thread locking piece, each of the plurality of locking piece annular grooves is arranged along the circumferential direction of the screw thread locking piece,
The reed hole is formed in one of the plurality of second annular top surfaces in the middle of the threaded lock block, and the cutting groove extends into the reed hole from the inner surface of the upper end of the threaded lock block along the longitudinal direction of the threaded lock block.
In particular, the first annular top surface in the lock block support sleeve and the second annular top surface in the threaded lock block correspond to each other, and the support collar-shaped groove of the lock block support sleeve and the lock block annular groove of the threaded lock block correspond to each other,
one end of the lock block reed is inserted into the reed hole of the threaded lock block, and the other end of the lock block reed passes 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 setting sleeve, an upper short section, a packer mandrel, a rubber upper seat, a waveform spring, a lock ring, a rubber guide shoe, an inner rubber, an outer rubber, a rubber lower seat, a push ring, an upper cone, slips, a guide ring, a lower cone, a mandrel lock block, a stop sleeve, a packer outer cylinder, a switch sleeve, a bearing ring and a bottom joint,
the inner surface of the upper end of the guide joint is contacted with the outer surface of the setting sliding sleeve, the inner surface of the lower end 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, 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 nipple, the inner surfaces of the two ends of the upper nipple are respectively connected with the thread locking block and the outer surface of the upper end of the packer mandrel,
the packer mandrel sequentially penetrates through an inner cavity of a rubber sleeve upper seat, an inner rubber sleeve, a push ring, an upper cone, slips, a guide ring, a lower cone, a stop sleeve and a switch sleeve, the inner surface of the rubber sleeve upper seat is sequentially connected with the lower end of a setting sleeve, a lock ring and the outer surface of the packer mandrel, a waveform spring seat and a waveform spring are sequentially sleeved on the outer surface of the packer mandrel in the rubber sleeve upper seat from top to bottom, the lock ring is arranged below the waveform spring, both ends of the inner rubber sleeve are respectively sleeved with the outer rubber sleeve and the rubber sleeve guide shoe, the packer mandrel is connected with the lower cone through a mandrel locking 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 cylinder, the inner surface of the lower end of the packer outer cylinder is in threaded connection with the bottom joint, and the switch sleeve is arranged between the packer outer cylinder and the bearing ring.
Further, the slip is provided with an annular tooth tip, a first left groove and a first right groove, the first left groove and the first right groove are alternately arranged with each other, the first left groove extends from a first end of the slip to a second end portion opposite to the first end, the first right groove extends from the second end of the slip to the first end portion, and the annular tooth tip is respectively arranged on the outer surfaces of the first end and the second end of the slip.
Specifically, the slips are also provided with pin holes, the annular tooth tips are divided into a plurality of tooth tip sections by the first left cutting grooves, the pin holes are arranged on the tooth tip sections between the adjacent first left cutting grooves, the slips are connected with the cone on the packer through the pin holes, the inner surface of each tooth tip section of the plurality of tooth tip sections is provided with a cone surface with gradually reduced thickness towards the end part,
the slips are integrally formed, and the cross section of the annular tooth tip is wavy.
Specifically, 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 longitudinal direction of the bearing ring, the third annular top surface is arranged along the circumferential direction of the bearing ring, the bearing ring annular groove is arranged along the circumferential direction of the bearing ring,
The second left and right slits of the carrier ring are alternately arranged with each other, the second left slit extending from an upper end of the carrier ring to a lower end portion of the carrier ring in a longitudinal direction of the carrier ring, and the right slit extending from a lower end of the carrier ring to an upper end portion of the carrier ring in the longitudinal direction of the carrier ring.
Specifically, switch cover is equipped with a plurality of limbers, water channel, fourth annular top surface, switch lantern ring groove and deblocking step on the switch cover, a plurality of limbers are followed the circumferencial direction of switch cover is arranged on the surface of switch cover, just a plurality of water channels are followed the circumferencial direction of switch cover is interval setting each other, a plurality of water channels respectively with corresponding water channel intercommunication in a plurality of water channels, a plurality of water channels are located a plurality of water channel upper ends and perpendicular to a plurality of water channels.
The fourth annular top surface of switch sleeve and switch lantern ring groove set up on the internal surface of one end of switch sleeve and each other the interval sets up, the fourth annular top surface with the third annular top surface of carrier ring corresponds, the carrier ring slot with the switch lantern ring groove corresponds, the internal surface of the other end of switch sleeve is followed the radial direction inwards outstanding formation of switch sleeve the deblocking step.
The load bearing assembly for a pipe string according to the present invention has at least one of the following advantages:
(1) The bearing component for the pipe column and the pipe column provided by the invention are a top packer and a setting device thereof, which are specially used for gravel packing or simple sand prevention, wherein the slips arranged in the pipe column are of an integral structure, have large rebound force and a certain length, and are not biased in the process of upward lifting after the packer is unpacked, so that the slips are not clamped all the time in the lifting process after the packer is unpacked, and the situation that the slips are clamped is avoided;
(2) The bearing component for the pipe column and the pipe column provided by the invention have the function of transmitting torque, and if the pipe column is blocked in the process of being put into the pipe column, the pipe column can be rotated forward, so that the blocking can be removed.
(3) The bearing component for the pipe column and the pipe column releasing mode provided by the invention can be a drill pipe pressing releasing mode, and also can be a mode of adopting forward rotation (namely clockwise rotation) pipe column releasing, when the pipe column is pressed and released, the pressure bearing requirement on wellhead equipment is low, and frequent switching between drill pipe pressing and annular pressing of a pressing pipeline is not required;
(4) The bearing component for the pipe column and the pipe column provided by the invention adopt the structure of the elastic clamping head and the bearing lug to prevent the forward setting, so that the pipe column has strong forward setting prevention capability;
(5) The bearing component for the pipe column and the inner flushing pipe nipple in the pipe column are provided with the rotating structure, and when the bearing component is connected with the flushing pipe in a well, the flushing pipe in the well or the top packer and the setting device with large weight do not need to be rotated;
(6) According to the bearing assembly for the pipe column and the circulating channels special for gravel filling, such as the water through grooves or the water through holes are formed in a plurality of positions in the pipe column, and the piston effect can be prevented in the lifting and lowering processes after releasing the setting device, so that stratum collapse accidents are avoided;
(7) The bearing assembly for the pipe column and the pipe column provided by the invention are provided with the outer flushing pipe nipple and the inner flushing pipe nipple which are provided with standard flushing pipe threads, are easy to connect with a flushing pipe for gravel packing, are provided with the top circulation hole on the sealing mandrel, and are externally sleeved with the sealing ring assembly, and the 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, in which:
FIG. 1a is a schematic structural view of a left end portion of a pipe string according to one embodiment of the present invention, from an upper joint to a break line 1-1;
FIG. 1b is a schematic structural view of a middle portion of a pipe string according to one embodiment of the present invention, wherein the middle portion is the portion shown from the broken line 1-1 to the broken line 2-2 in the drawings;
FIG. 1c is a schematic structural view of a right end portion of a pipe string, which is a portion from the line of severance 2-2 to the bottom sub in the drawings, according to one embodiment of the present invention;
FIG. 2 is a schematic view of the setting nipple of FIG. 1 a;
FIG. 3 is a schematic 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 load bearing lugs of FIG. 1 a;
fig. 7a is a partial enlarged view at a circle indicated by a mark M in fig. 1 a;
FIG. 7b is a schematic view of the carrier assembly of FIG. 1 a;
FIG. 8 is a schematic view of the structure of the shear pawl shown in FIG. 1 a;
FIG. 9 is a schematic view of the release pawl of FIG. 1 a;
FIG. 10 is a cross-sectional view taken along line B-B of FIG. 1B;
FIG. 11 is a schematic view of the configuration of the upper sub of FIG. 1 b;
FIG. 12 is a schematic view of the construction of the lock block support sleeve of FIG. 1 b;
FIG. 13 is a schematic view of the threaded locking block of FIG. 1 b;
FIG. 14 is a schematic view of the installation of the threaded lock 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 view of the construction of the landing nipple of FIG. 1 b;
FIG. 17 is a schematic illustration of the structure of the packer mandrel shown in FIG. 1 b;
FIG. 18 is a schematic view of the double-start locking thread of FIG. 17;
FIG. 19 is a schematic view of the shackle threads of the shackle shown in FIG. 1 b;
FIG. 20 is a schematic illustration of the construction of the slip of FIG. 1 b;
FIG. 21 is a schematic view of the guide ring of FIG. 1 c;
FIG. 22 is a schematic view of the load ring of FIG. 1 c;
fig. 23 is a schematic view of the construction of the switch cover shown in fig. 1 c.
Detailed Description
The technical scheme of the invention is further specifically described below through 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 embodiments of the present invention with reference to the accompanying drawings is intended to illustrate the general inventive concept and should not be taken as limiting the invention.
Loose sandstone hydrocarbon reservoirs are widely distributed worldwide, and the hydrocarbon reservoirs are easy to produce sand in the production process due to shallow burial and loose cementation. Currently, sand control treatments are generally performed in two ways, namely 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 technologies. The top packer and the setting tool thereof have the problems that after a pipe column is unsealed, slips are easy to be clamped in the process of lifting the pipe column, torque cannot be transmitted in the process of lowering the pipe column, release is difficult, and pre-setting is easy to be carried out.
The bearing assembly for the pipe column and the pipe column provided by the invention are provided with the top packer and the setting device thereof, which are specially used for gravel packing or simple sand prevention, and can solve the technical problems.
Referring to fig. 1a-1c, the string includes a setting device and a packer (e.g., a top packer, i.e., a packer closest to the wellhead for hanging the sand control string when the sand control string is run into the well). The setting device comprises an upper joint 2, a protective sleeve 3, a setting nipple 5, an outer barrel pressing cap 7, a separating ring 8, a flat key 11, a piston 13, a piston outer barrel 15, a piston extension barrel 16, a setting mandrel 17, a sliding sleeve pressing cap 18, a setting sliding sleeve 21, a bearing component, a shearing outer sleeve 24, a shearing release sleeve 29, a locking piece supporting sleeve 30, a locking piece reed 31, a shearing pawl 33 (shown in fig. 8), a releasing pawl 36 (shown in fig. 9), a positioning nipple 37, a setting ball 41, a ball seat nipple 44, an inner flushing nipple 48, an inner flushing sleeve 49, a sealing ring assembly 50, a sealing mandrel 52 and an outer flushing nipple 54.
The packer comprises a guide joint 55, a setting sleeve 57, an upper short joint 58, a packer mandrel 60, a rubber upper seat 61, a waveform spring seat 62, a waveform spring 63, a lock ring 65, a rubber guide shoe 66, an inner rubber 67, an outer rubber 68, a rubber lower seat 69, a push ring 70, an upper cone 72, an upper cone opening ring 74, slips 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 nipple 5, the piston 13, the piston extension cylinder 16, the bearing assembly, the shear jacket 24, the shear release sleeve 29, the release pawl 36, the locking piece support sleeve 30 and the positioning nipple 37.
The internal surface of the one end of top connection 2 passes through the screw pair and is connected with protective sheath 3, and the surface of the other end passes through holding screw 4 and screw pair and is connected with the internal surface of the upper end of setting nipple 5, promptly the first end of setting nipple 5 extends to on the surface of top connection 1, and through O shape circle 6 with top connection 1 sealing connection. The inner surface of the lower end of the setting nipple 5 is connected with a setting mandrel 17. An O-ring 1 is also arranged between the upper joint 2 and the protective sleeve 3, and the upper joint 2 and the protective sleeve 3 are connected with each other in a sealing way through the O-ring 1. As shown in connection with fig. 1a, 2 and 3, the setting nipple 5 is provided with a plurality of pressure transfer holes 501 and keyways 502. All of the plurality of pressure transmitting holes 501 extend from the middle part of the setting nipple 5 to the bottom end of the setting nipple 5, and adjacent pressure transmitting holes of the plurality of pressure transmitting holes 501 are arranged at intervals. The bottom end of the setting nipple 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 closer to the wellhead when the string is lowered into the well, and the term "lower end" is the end that is closer to the bottom of the well when the string is lowered into the well.
As shown in fig. 1a and fig. 2, a plurality of key grooves 502 for accommodating the flat key 11 are further provided at the bottom end of the setting nipple 5, and the plurality of key grooves 502 and the plurality of pressure transmitting 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, and the other end is provided with spline grooves 172 and short pin holes 173, the key groove 171 and the spline grooves 172 being respectively arranged along the circumferential direction of the setting mandrel 17, and the short pin holes 173 being provided on opposite sides of the other end of the setting mandrel 17. As shown in fig. 1a, 2 and 3, the flat key 11 is installed in the key groove 502 and the key groove 171, the setting nipple 5 is connected with the setting mandrel 17 through the flat key 11 and the thread pair, the torque transmission function is achieved, and the setting nipple 5 is also connected with the setting mandrel 17 in a sealing manner through the O-shaped ring 9.
Referring to fig. 1a, a piston 13 is sleeved at one end of a setting mandrel 17, which is close to the setting nipple 5, and the piston 13 is disposed 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. An O-ring 14 is provided inside the piston 13, whereby the piston 13 forms a sealing connection with the setting spindle 17. And the O-shaped rings 10 are arranged outside (i.e. on the outer surface) of the setting nipple 5 and the piston 13, so that the setting nipple 5 and the piston 13 form sealing connection with the piston outer cylinder 15 sleeved outside. Referring to fig. 1a and fig. 4, 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) is sleeved with an outer cylinder pressing cap 7, the piston outer cylinder 15 is fixedly connected with the outer cylinder pressing cap 7 through a set screw 12, and in addition, a separating ring 8 is 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 in the middle part 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 an initial setting pin 22. One end of the piston extension cylinder 16 is disposed in the inner cavity of the piston outer cylinder 15, the other end extends out of the inner cavity of the piston outer cylinder 15 and is located 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 disposed between the two. The outer part of one end of the setting sliding sleeve 21, which is 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 sliding sleeve pressing cap and the sliding sleeve pressing cap.
As shown in fig. 1a and fig. 5-7b, the lower end of the piston extension cylinder 16 (i.e. the end sleeved with the setting sliding sleeve) is sleeved on the elastic chuck 23 in the bearing assembly, and the bearing assembly is sleeved on the setting mandrel 17 below the piston extension cylinder 16. The carrier assembly further comprises a carrier lug 25, a resilient member 26 and a pin 27, the resilient clip 23 comprising a clip body 235 and a plurality of resilient fingers 236 connected to each other. The collet body 235 is annular, the plurality of elastic claws 236 are disposed along a circumferential direction of the collet body, an elongated slot 231 is disposed between two adjacent elastic claws 236 of the plurality of elastic claws 236, and the elongated slot 231 is disposed along a longitudinal direction of the plurality of elastic claws 236. The collet body 235 has a body lumen through which the setting mandrel 17 passes and is removably connected to the carrier assembly. Each of the plurality of elastic claws 236 includes a claw head 237 and a claw body 238, and one end of the claw body 238 is connected to the claw head 237 and the other end is provided on the elastic chuck 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 appreciated by those skilled in the art that the jaw head 237 and the jaw body 238 in the elastic jaw 236 may be integrally formed, or may be two separate components, which may be connected by welding, screws, etc., and that each elastic jaw 236 may be integrally formed with the elastic jaw body 235, or may be fixedly connected by welding, screws, etc., and that those skilled in the art may select the connection between the jaw head and the jaw body, or between the elastic jaw body and each elastic jaw, as desired, and that this example is merely an illustrative example, and that those skilled in the art may make corresponding selections as desired.
As shown in fig. 5 to 7b, the collet body 235 is provided with a plurality of lug grooves 232 for receiving elastic lugs, and spindle holes 233 passing through the lug grooves 232 are provided on the collet body 235 in the circumferential direction of the collet body 235. A plurality of lug grooves 232 are spaced apart along the circumference of the collet body 235.
The carrying lug 25 includes a carrying lug body 251, and first and second protrusions 253 and 256 provided on the carrying lug body 254, a groove 254 is provided between the first and second protrusions 253 and 256, and an elastic member hole 255 for accommodating the elastic member 26 is provided in the carrying lug body 251 at a position corresponding to the groove 254. The elastic member 26 is installed in the elastic member hole 255, and the pin 27 sequentially passes through the spindle hole 233 and the groove 254, 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, with the spring in a contracted state. When the load lugs 25 are installed in the collet 23, the load lugs 25 are outwardly ejected out of the outer surface of the collet 23 and ride on ramps 551 of a pilot joint 55 (described in detail below) of a packer (e.g., a top packer). It will be appreciated by those skilled in the art that the resilient member may be other existing resiliently deformable members than a spring, and that this example is merely an illustrative example and should not be construed as limiting the utility model.
The bottom end of the carrying lug body has an inner boss 252 and an outer boss 252' protruding from the inner and outer surfaces of the carrying lug body, respectively. Accordingly, annular grooves 234 are provided on the inner wall of the collet body 235 at positions corresponding to the plurality of lug grooves 232. In the assembled state, the carrying lug body 251 is received in the lug well 232, the inner and outer bosses 252, 252' bear against the inner wall of the annular groove 234, and the first and second bosses 253, 256 protrude from the outer surface of the collet body 235.
In one example, the curvature of the inner and outer surfaces of the load-bearing lug body 251 can be designed by one skilled in the art to be the same as the curvature of the inner surface of the lug well 232. That is, in the assembled state, when the carrying lugs 25 are assembled in the lug grooves 232, the circular arc-shaped surfaces of the carrying lug bodies 251 are fitted with the circular arc-shaped inner surfaces of the lug grooves 232, and the circular arc-shaped surfaces of the inner bosses 252 and the outer bosses 252' of the carrying lug bodies 251 are fitted with the circular arc-shaped inner surfaces of the annular grooves 234. In one example, the annular groove 234 is wider than the lug groove 232, and the lug groove 232 opens to the annular groove 234, with the other side of the lug groove 234 opening to the outer surface of the collet 23.
Referring to fig. 1a, the jaw 237 of each elastic jaw 236 of the collet 23 is sleeved in a bearing annular groove at the lower end of the piston extension cylinder 16, the bearing annular groove is arranged along the circumference direction of the piston extension cylinder 16, and thus 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 carrier assembly, a shear jacket 24 is provided 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 adjacent to the shear jacket 24 extends into the interior cavity of the shear jacket 24 and is fixedly connected to the setting mandrel 17 by a set screw 28 and to the shear jacket 24 by a 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 sleeve 21, the middle part of the guide joint is located below the setting sleeve 21 and above the setting sleeve 57, and 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 is abutted against the inner surfaces of the first protrusion 253 and the second protrusion 256 of the bearing lug 25 of the bearing assembly, the inner surface of the lower end of the guide joint 55 is connected with the outer surface of the upper end of the setting sleeve 57 by means of a screw pair and a set screw 56, and the upper ends of the setting sleeve 57 are abutted against the outer surfaces of the first protrusion 253 and the second protrusion 256, i.e. the first protrusion 253 and the second protrusion are accommodated in an annular groove 88 formed around the upper ends of the guide joint 55 and the setting sleeve 57 (i.e. the end of the setting sleeve near the piston extension cylinder 16). The outer surface of the lower end of the seat envelope 57 (i.e., the end opposite to the upper end) is connected to the inner surface of a packing element upper seat 61 (described in detail later) 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 envelope 57, and the shear pawl 33 is sleeved on the release pawl 36. Referring to fig. 8, the inner cavity of the shearing pawl 33 is provided on the surface thereof with an inner spline 331 and an inner spline groove 332 spaced apart from each other in the circumferential direction, and the outer surface of the shearing pawl 33 is provided with an outer spline 333 spaced apart in the circumferential direction, and two long pin holes 335 disposed opposite to each other are communicated with the inner cavity of the shearing pawl 33 through the outer surface of the shearing pawl 33. The inner spline 361 is provided on the surface of the inner cavity of the release pawl 36 at intervals in the circumferential direction, the outer spline 363 and the outer spline groove 364 are provided on the outer surface of the release pawl 36, and the short pin hole 365 and the long pin hole 366 which communicate with the inner cavity are also provided on the outer surface of the release pawl 36.
As shown in connection with fig. 1b and 10, spline grooves 172 on setting mandrel 17 mate with internal splines 361 on release pawl 36, external splines 363 on release pawl 36 mate with internal spline grooves 332 of shear pawl 33, and external spline grooves 364 on release pawl 36 mate with internal splines 331 of shear pawl 33, external splines 333 of shear pawl mate with spline grooves 581 of upper nipple (described in detail below), and then short pin holes 365 of release pawl 36 and short pin holes 173 of mandrel 17 are connected by brass short pin 35, and long pin holes 335 of shear pawl 33 and long pin holes 366 of release pawl 36 are connected by brass long pin 34, facilitating torque transfer by such arrangement.
As shown in fig. 11, spline grooves 581 are provided on the end face of the upper end of the upper nipple 58 at intervals in the circumferential direction, a plurality of water holes 583 and a plurality of screw holes 584 are provided on the other end, the plurality of water holes are provided at intervals in the circumferential direction of the upper nipple 58, and release threads 582 are further provided on the outer surface of the upper nipple 58. In one example, the release threads 582 are left-hand threads. Those skilled in the art will appreciate that this example is merely an illustrative example, and that those skilled in the art may select as desired, for example, right-handed threads.
Referring to fig. 1b, the upper end of the locating nipple 37 is sleeved on the setting mandrel 17 and below the shear release sleeve 29. The setting mandrel 17 is connected with the positioning nipple 37 through a thread pair and a set screw 38, and an O-shaped ring 39 is arranged between the setting mandrel and the positioning nipple for sealing connection.
As shown in fig. 1b and 12-15, the locking piece support sleeve 30, the threaded locking piece 43 and the locking piece reed 31 are arranged in the positioning nipple 37. The threaded locking piece 43 is sleeved on the locking piece supporting sleeve 30, and the locking piece reed 31 is accommodated in a cavity between the locking piece supporting sleeve 30 and the threaded locking piece 43. In one example, the cross-sectional shape of the lock piece reed 31 is set to be S-shaped.
A plurality of annular top surfaces 301 and a plurality of support collar grooves 302 are arranged on the outer surface of the lock block support sleeve 30 in the longitudinal direction, and the plurality of annular top surfaces 301 and the plurality of support collar grooves 302 are alternately arranged with each other, each of the plurality of annular top surfaces 301 is arranged along the circumferential direction of the lock block support sleeve 30, and each of the plurality of support collar grooves 302 is arranged along the circumferential direction of the lock block support sleeve 30. The outer surface of the thread locking block 43 is provided with left-handed external threads 431 which are connected with the upper nipple releasing threads 582 in a matching way. Those skilled in the art will appreciate that the left-hand external thread 431 and the release 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 locking block 43 is also provided with 3 annular top surfaces 432, 2 locking block annular grooves 433, a slot 434 and a reed hole 435. The 3 annular top surfaces 432 and the 2 locking piece annular grooves are alternately arranged on the surface of the inner cavity of the screw locking piece 43 along the longitudinal direction of the screw locking piece, each annular top surface 432 of the 3 annular top surfaces 432 is arranged along the circumferential direction of the screw 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 screw locking piece 43.
The spring aperture 435 is located on the central 2 nd annular top surface 432 of the threaded lock block 43, and the slot 434 extends into the spring aperture 435 in the longitudinal direction of the threaded lock block from the 1 st annular top surface of the threaded lock block 43 (i.e., near the end of the shear release sleeve 29). As shown in fig. 14, the screw lock block 43 is turned first and then cut into 4 blocks, and is marked in the order shown in the drawing, and is assembled in the order shown in the drawing. It will be appreciated by those skilled in the art that the number of annular top surfaces on the threaded lock block and/or the number of annular grooves on the lock block may be selected accordingly as desired and may be set to 4, 5 or more.
As shown in fig. 16, the positioning nipple 37 is provided with a plurality of rectangular grooves 371, a plurality of second release pin holes 372, and a plurality of water through grooves 373. The plurality of rectangular grooves 371 are arranged at one end of the positioning nipple 37, which is close to the locking piece supporting sleeve 30, along the circumferential direction of the positioning nipple 37 at intervals, a plurality of second releasing pin holes 372 are arranged below the plurality of rectangular grooves 371, and a plurality of water through grooves 373 are arranged at intervals along the circumferential direction of the positioning nipple 37 below the plurality of second releasing pin holes 372.
When assembled, the annular top surface 301 of the lock block support sleeve 30 corresponds to the annular top surface 432 of the threaded lock block 43, the support collar groove 302 of the lock block support sleeve 30 corresponds to the lock block annular groove 433 of the threaded lock block 43, one end of the lock block reed 31 is inserted into the reed hole 435 of the threaded lock block, and the other end passes through the cutting groove 433 to be pressed on the upper end of the lock block support sleeve 30 (namely, the end close to the shear release sleeve); the second release pin 32 passes through a second release pin hole 372 of the locating nipple 37 and a second release pin hole 303 provided on an end of the locking block support sleeve 30 near the locating nipple 37.
Referring to fig. 1b, a locating nipple 37 has one end connected to the setting mandrel 17 and the other end connected to a ball seat nipple 44 by a threaded pair and set screw 42, with an O-ring 40 therebetween. The outer surface of the upper end of the ball seat nipple 44 is connected with the inner surface of the positioning nipple 37, the lower end is connected with the outer surface of the upper end of the inner flushing pipe sleeve 49 through a thread pair and a set screw 46, and an O-shaped ring 45 is arranged between the thread pair and the set screw for sealing connection. The inner surface of the lower end of the inner punch sleeve 49 is connected to the outer surface of the upper end of the sealing mandrel 52 by a screw pair.
A sealing ring assembly 50 and an O-ring 51 are mounted on the outer surface of the sealing mandrel 52, and top circulation holes 521 are arranged on the sealing mandrel 52 at intervals along the circumferential direction, and function to establish a circulation channel during the subsequent sand control operation. The lower end of the sealing mandrel 52 is connected with the inner surface of the upper end of the outer flushing pipe nipple 54 through a screw pair, and an O-shaped ring 53 is arranged between the sealing mandrel and the inner surface. The lower end of the outer washpipe nipple 54 is provided (i.e., remote from the end to which the sealing mandrel 52 is attached) with a washpipe thread pair for connection to a standard washpipe.
With continued reference to fig. 1b, an inner washpipe nipple 48 is nested within an inner washpipe sleeve 49 with an O-ring 47 therebetween for sealing connection. The lower end of the inner washpipe nipple 48 (i.e., the end to which the sealing mandrel 52 is attached) is provided with washpipe threads for connection to standard washpipe. The outer surface of the upper end of the inner washpipe nipple 48 (i.e., the end near the ball seat nipple 44) projects radially outwardly to form a rotating shoulder 481. In use, the swivel shoulder 481 may hang from the upper end of the sealing mandrel 52 (i.e., the end adjacent the inner casing 49) and function to swivel freely when the inner tubular nipple 48 and its lower end of the lower tubular string are connected to a standard tubular in a well without having to swivel a heavy weight standard tubular in a well or the entire packer and setting device.
As shown in fig. 1b, the packer mandrel 60 passes through the inner cavities of the packing element upper seat 61, the inner packing element 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 that order. The upper end of the packer mandrel 60 is connected to the upper sub 58 by a threaded pair. Referring to fig. 1b and 17-19, a sealing surface 601 is provided on the surface of the inner cavity of the packer mandrel 60, and a double-ended locking thread 602, a split ring thread 603, a key slot 604, and a carrier ring thread 605 are provided on the outer surface in sequence from top to bottom (i.e., along the longitudinal direction of the packer mandrel 60). Wherein the thread form angle of the double-ended locking thread 602 is of an oblique triangle configuration (as shown in fig. 18). The keyways 604 are spaced along the circumference of the packer mandrel 60.
The outer surface of the packer mandrel 60 in the upper rubber seat 61 is sequentially sleeved with a wave spring seat 62, a wave spring 63 and a locking ring 65 from top to bottom (namely along the longitudinal direction of the tubular column), and the rotation preventing pin 59 is inserted into a screw hole 584 of the upper short section 58 through a long groove of the seat sleeve 57. In one example, the locking ring 65 is a split ring with locking threads (as shown in fig. 19) on the inner surface that mate with the double-ended locking threads 602, the thread form angle of which is the same as the thread form angle of the double-ended locking threads 602 (as shown in fig. 18), and the thread pitch of which is 2 times the thread pitch of the double-ended locking threads 602. Referring to fig. 1b, the inner surface of the upper seat 61 of the packing element is provided with an internal thread, which cooperates with an external thread of the locking ring 65, and the tooth angle thereof is a trapezoidal thread. The anti-rotation pin 64 fixedly connects the upper seat 61 of the packing element with the locking ring 65.
An inner rubber cylinder 67 is sleeved on the packer mandrel 60 below the rubber cylinder upper seat 61. Both ends of the inner rubber cylinder 67 are respectively sleeved with an outer rubber cylinder 68 and rubber cylinder guide shoes 66, and the rubber cylinder guide shoes 66 are arranged on the outer sides of the outer rubber cylinders 68. The push ring 70 and the upper cone 72 are sequentially sleeved on the packer mandrel 60 below the rubber boot 66, an upper cone split ring 74 is further contained in a cavity between the upper cone 72 and the packer mandrel 60, the upper cone split ring 74 is matched with the split ring threads 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 the split ring pin 73. The lower rubber seat 69 is sleeved on the push ring 70 and is connected with the lower rubber seat 69 through the 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 the upper cone 72 through a screw pair, and the other end of the upper cone 72 extends out of the lower rubber 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 upper cone 72 and the packer mandrel 60 below the upper cone 72 and connect the upper cone 72 by slip pins 75. Slips 76 are unitary and are provided with pin holes 761, annular prongs 762, left and right slots 763, 764, the left and right slots 763, 764 alternating with one another, the left slot 763 extending from a left end (i.e., left in the page) to a right end (i.e., right in the page) portion of slips 76, and the right slot 764 extending from a right end to a left end portion of slips 76. Conical surfaces 765 are arranged at two ends. The annular teeth 762 are respectively arranged on the outer surfaces of the two ends of the slips 76, and the cross section of the annular teeth 762 is corrugated. The annular cusp 762 is divided into a plurality of cusp segments by the left slots 763, and the pin holes 761 are provided on the cusp segments between adjacent left slots 763. The slips are connected to the upper cone 72 by the pin holes 761. The inner surface of each cusp section is provided with tapered surfaces 765 having a thickness that tapers toward the ends.
As shown in connection with fig. 1b and 21, a guide ring 77 is sleeved on the packer mandrel 60. The guide ring 77 is provided with screw holes 771, splines 772 and a guide ring body. The plurality of splines 772 are disposed on the outer surface of the guide ring body at intervals from each other 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 screws 78 pass through screw holes 771 to secure the guide ring 77 to the packer mandrel 60, and splines 772 are installed in right slots 764 of slips 76 and act as guides when slips 76 are moved.
A lower cone 79 is sleeved on the packer mandrel 60 below the slips 76, the upper end of the lower cone 79 is contacted with a conical surface 765 at one end of the slips 76, and the lower end is provided with a lower cone key slot 791 matched with the key slot 604 of the packer mandrel 60. The mandrel lock block 80 is received within the key slot 604 and lower cone key slot 791 of the packer mandrel 60 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 joint 87.
As shown in fig. 22, a carrier ring 84 is disposed within the interior cavity of the outer packer barrel 82 and is sleeved over the packer mandrel 60, the carrier ring 84 being provided with internal threads 841, an annular top surface 842, a carrier ring annular groove 843, a right slot 844, and a left slot 845. The internal threads 841 of the carrier ring 84 are matingly coupled with the carrier ring threads 605 of the packer mandrel. Annular top surfaces 842 and carrier ring annular grooves 843 are alternately arranged on an outer surface of the carrier ring 84 in a longitudinal direction of the carrier ring 84, and the annular top surfaces 842 are arranged in a circumferential direction of the carrier ring 84, and the carrier ring annular grooves 843 are arranged in the circumferential direction of the carrier ring 84. The left and right slots 845, 844 of the carrier ring 84 alternate with each other, the left slot 845 extending from an upper end of the carrier ring to a lower end portion of the carrier ring in a longitudinal direction of the carrier ring 84, and the right slot 844 extending from a lower end of the carrier ring to an upper end portion of the carrier ring in the longitudinal direction of the carrier ring 84.
As shown in fig. 1c and 23, a switch sleeve 83 is sleeved inside the packer outer casing 82 and outside the carrier 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 collar groove 834, and a unsealing shoulder 835. A plurality of water through holes 831 are arranged on the outer surface of the switch cover 83 in the circumferential direction of the switch cover 83, and a plurality of water through grooves 832 are provided at intervals from each other in the circumferential direction of the switch cover 83, the plurality of water through holes 831 being respectively communicated with the corresponding water through grooves 832.
An annular top surface 833 of the switch sleeve 83 and a switch collar slot 834 are provided on an inner surface of one end of the switch sleeve 83 and are spaced apart from each other, the annular top surface 833 corresponding to the annular top surface 842 of the carrier ring 84. The inner surface of the other end of the switch cover 83 protrudes inward in the radial direction of the switch cover to form a deblocking step 835. An O-shaped ring 85 is arranged between the switch sleeve 83 and the packer mandrel 60 and between the switch sleeve and the bottom joint 87, and is connected with the packer outer cylinder 82 through a deblocking lower end 86.
The specific structure of the bearing assembly and the pipe column provided by the invention is further described below by describing the working principles of the bearing assembly and the pipe column in detail.
In connection with the description of fig. 1 a-23, the packer, setting device and carrier assembly are first assembled at the surface, and it will be appreciated by those skilled in the art that the packer and setting device used herein may be any existing packer and setting device, although the packer and setting device provided by the present invention may be employed. Then, other tools are run into the well, and when the inner pipe nipple 48 and its lower pipe (packer, setting device and carrier assembly are assembled and then the other tools are run into the well, the "pipe" is part of the other tools) are engaged with the earlier run-in pipe (the earlier run-in pipe is part of the sand control string and is connected with the "and its lower pipe" at the wellhead) at the wellhead, the inner pipe nipple 48 and its lower pipe can be rotated without having to rotate the very heavy borehole pipe or the entire packer and setting device.
If the pipe column is blocked in the process of running in the pipe column, the pipe column can be rotated forward to release, and the torque transmission way is as follows: the upper joint 2, the setting nipple 5, the flat key 11, the setting mandrel 17, the release pawl 36, the shearing pawl 33, the upper nipple 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 rotation of a drill rod.
During the running of the pipe string, the weight of the guide joint 55, the seat sleeve 57 and the rubber upper seat 61 is suspended on the bearing lug 25 through the inclined surface 551 of the guide joint 55, and the bearing lug 25 has stronger bearing capacity than a common pin, so that the rubber upper seat 61 cannot move relative to the packer mandrel 60 even when the weight is required to be lifted or pressed down after the pipe is blocked, and has stronger anti-front setting capacity.
After the sand control pipe column is put into place, the setting ball 41 is put into the wellhead, the pressure is applied to the upper joint 2 through a drill rod (not shown), the piston 13 and the piston extension cylinder 16 are pushed to move downwards through the pressure transmission hole 51, the initial setting pin 22 is sheared off, and the elastic chuck 23 is released; the piston extension cylinder 16 drives the setting sliding sleeve 21 to move downwards through the releasing pin 20 to push the guide joint 55, the setting sleeve 57, the elastic chuck 23, the bearing lug 25, the spring 26 and the pin shaft 27 to move downwards, and 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.
Continuing to press the pipe column, the seat sleeve 57 pushes the rubber cylinder upper seat 61 and the waveform spring 63, the waveform spring seat 62 and the locking ring 65 in the rubber cylinder upper seat to move downwards, and the locking ring 65 cannot retract after moving downwards along the double-end locking thread 602 of the packer mandrel 60 due to the triangular tooth-shaped structure of the packer mandrel thread and the locking ring internal thread, so that the locking effect is generated. The upper rubber seat 61 pushes the rubber guide shoe 66, the outer rubber 68, the inner rubber 67, the lower rubber seat 69 and the upper cone 72 downwards in sequence, the split ring pin 73 and the slip pin 75 are sheared off, the slip 76 is pushed by the upper cone 72, the conical surface 765 moves along the inclined plane of the lower cone under the guidance of the guide ring 77, the annular tooth tips 762 are clamped on the inner wall of the sleeve to form an anchor, the outer rubber 68 and the inner rubber 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 the guide joint 55 and the setting sliding sleeve 21 cannot move downwards any more.
Continuing to press the string again, the release pin 20 is sheared off because the setting sleeve 21 can no longer move downward, and the piston extension cylinder 16 continues to push the collet 23, shear release sleeve 29, release pawl 36 downward, and the long brass pin 34 and short brass pin 35 are sheared off.
The release pawl pushes the lock block support sleeve 30 downwards, the second releasing pin 32 is sheared, the annular top surface 301 of the lock block support sleeve 30 is changed from being corresponding to the annular top surface 432 of the threaded lock block 43 to being corresponding to the annular groove 433, the threaded lock block 43 loses internal support, the lock block reed 31 is contracted inwards, and the external thread 431 of the threaded lock block is separated from the releasing thread 582 of the upper short joint, so that the pressing releasing is realized. If the locking screw 43 cannot be retracted inwards for a special reason to cause the failure of the releasing, the pipe column can be rotated positively, and the external screw 431 of the locking screw and the releasing screw 582 of the upper short section are both left-handed screws to release the pipe column positively.
When a deblocking packer (such as a top packer) is required, a special deblocking tool is put in and clamped on a deblocking shoulder 835 of a switch sleeve, the deblocking tool is lifted up, a deblocking pin 86 is sheared off, an annular top surface 833 of the switch sleeve 83 is relatively strained from being in correspondence with an annular top surface 842 of a bearing ring 84 to being in correspondence with an annular groove 843, the bearing ring loses external constraint, and under the action of a right grooving 844 and a left grooving 845, an internal thread 841 of the special deblocking tool is disengaged from a spindle bearing ring thread 605, a lower cone 79 is released, and a slip 76 is contracted to realize deblocking.
The load bearing assembly for a pipe string according to the present invention has at least one of the following advantages:
(1) The bearing component for the pipe column and the pipe column provided by the invention are a top packer and a setting device thereof, which are specially used for gravel packing or simple sand prevention, wherein the slips arranged in the pipe column are of an integral structure, have large rebound force and a certain length, and are not biased in the process of upward lifting after the packer is unpacked, so that the slips are not clamped all the time in the lifting process after the packer is unpacked, and the situation that the slips are clamped is avoided;
(2) The bearing component for the pipe column and the pipe column provided by the invention have the function of transmitting torque, and if the pipe column is blocked in the process of being put into the pipe column, the pipe column can be rotated forward (namely rotated clockwise) to release the blocking;
(3) The bearing component for the pipe column and the pipe column releasing mode provided by the invention can be a drill pipe pressing releasing mode, and also can be a mode of adopting forward rotation (namely clockwise rotation) pipe column releasing, when the pipe column is pressed and released, the pressure bearing requirement on wellhead equipment is low, and frequent switching between drill pipe pressing and annular pressing of a pressing pipeline is not required;
(4) The bearing component for the pipe column and the pipe column provided by the invention adopt the structure of the elastic clamping head and the bearing lug to prevent the forward setting, so that the pipe column has strong forward setting prevention capability;
(5) The bearing component for the pipe column and the inner flushing pipe nipple in the pipe column are provided with the rotating structure, and when the bearing component is connected with the flushing pipe in a well, the flushing pipe in the well or the top packer and the setting device with large weight do not need to be rotated;
(6) According to the bearing assembly for the pipe column and the circulating channels special for gravel filling, such as the water through grooves or the water through holes are formed in a plurality of positions in the pipe column, and the piston effect can be prevented in the lifting and lowering processes after releasing the setting device, so that stratum collapse accidents are avoided;
(7) The bearing assembly for the pipe column and the pipe column provided by the invention are provided with the outer flushing pipe nipple and the inner flushing pipe nipple which are provided with standard flushing pipe threads, are easy to connect with a flushing pipe for gravel packing, are provided with the top circulation hole on the sealing mandrel, and are externally sleeved with the sealing ring assembly, and the structures are suitable for gravel packing operation.
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 (13)
1. A load bearing assembly for a tubular string, wherein the tubular string comprises a setting device and a packer,
the setting device and the packer are connected through the bearing assembly, the bearing assembly comprises an elastic chuck, bearing lugs, a pin shaft and an elastic member, the elastic chuck comprises an elastic chuck main body and a plurality of elastic claws which are connected with each other, the elastic chuck main body is provided with a plurality of lug grooves for accommodating the elastic lugs, mandrel holes penetrating through the lug grooves are arranged on the elastic chuck main body along the circumferential direction of the elastic chuck main 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 passes through the mandrel hole and the groove, one end of the elastic component is abutted against the pin shaft,
the middle part of the setting device is sleeved on the plurality of elastic claws, and the top end of the packer is propped against the first bulge and the second bulge;
The elastic chuck body is annular, a plurality of lug grooves are arranged at intervals along the circumferential direction of the elastic chuck body, the plurality of elastic claws are arranged along the circumferential direction of the elastic chuck body, long grooves are arranged 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;
the elastic chuck body is provided with a body cavity, each elastic claw in the plurality of elastic claws comprises a claw head and a claw body, one end of the claw body is connected with the claw head, and the other end of the claw body is arranged on the elastic chuck body;
a bearing annular groove for accommodating the claw head of each elastic claw is arranged at one end of the setting device, which is close to the packer, along the circumferential direction of the setting device,
and annular grooves are formed in positions, corresponding to the lug grooves, on the inner wall of the elastic chuck main body.
The bottom end of the carrying lug body is provided with an inner boss and an outer boss which respectively protrude from the inner surface and the outer surface of the carrying lug body,
the bearing lug main body is accommodated in the lug groove, and the inner boss and the outer boss are abutted against the inner wall of the annular groove;
In an assembled state, the first protrusion and the second protrusion protrude from the outer surface of the elastic chuck body, and the elastic member is a spring; the spring is placed in the elastic member hole along the longitudinal direction of the elastic member hole, and is in a contracted state; the top end of the packer is provided with a guide joint, the lower end of the guide joint is contacted with the outer surface of the setting sliding sleeve, the middle part of the guide joint protrudes inwards along the radial direction of the guide joint to form an inclined plane, and the inclined plane of the guide joint is abutted against the inner surfaces of a first bulge and a second bulge of a bearing lug of the bearing assembly; when the bearing lug is arranged in the elastic chuck, the bearing lug is outwards ejected out of the outer surface of the elastic chuck and clamped on the inclined surface of the guide joint; the curvature of the inner surface and the outer surface of the carrying lug body are designed to be the same as the curvature of the inner surface of the lug groove, and in the assembled state, when the carrying lug is assembled in the lug groove, the circular arc-shaped surface of the carrying lug body is matched with the circular arc-shaped inner surface of the lug groove, and the circular arc-shaped surfaces of the inner boss and the outer boss of the carrying lug body are matched with the circular arc-shaped inner surface of the annular groove.
2. A pipe column is characterized in that,
The tubing string comprising the carrier assembly of claim 1, a setting device and a packer,
the setting device comprises an upper joint, a protective sleeve, a setting nipple, an outer cylinder pressing cap, a separating ring, a piston outer cylinder, a piston extending cylinder, a setting mandrel, a sliding sleeve pressing cap, a setting sliding sleeve, a shearing outer sleeve, a shearing releasing sleeve, a locking piece supporting sleeve, a locking piece reed, a shearing pawl, a releasing pawl, a positioning nipple, a ball seat nipple, an inner flushing nipple, a sealing ring assembly, a sealing mandrel and an outer flushing nipple,
the upper joint is sleeved on the protective sleeve after being connected with the upper end of the setting nipple, the outer surface of the lower end of the setting nipple is connected with the separating ring and the inner surface of the piston outer cylinder arranged below the separating ring, the upper end of the piston outer cylinder is sleeved with the outer cylinder pressing cap, the inner surface of the lower end of the setting nipple is connected with the upper end of the setting mandrel, the upper end of the setting mandrel is sequentially sleeved with the piston and the piston extension cylinder, the upper ends of the piston and the piston extension cylinder are accommodated in the piston outer cylinder, the sliding sleeve pressing cap and the setting sliding sleeve are sleeved on the lower end of the piston extension cylinder, the lower end of the piston extension cylinder is sleeved on the elastic claws of the elastic chuck in the bearing assembly, the bearing assembly is sleeved on the setting mandrel, the bearing annular groove is arranged on the inner surface of the lower end of the piston extension cylinder along the circumferential direction of the piston extension cylinder, the top end of the packer is propped against the first lug and the second lug of the bearing lug, the shear jacket, the shear release sleeve, the release pawl, the locking piece supporting sleeve and the positioning nipple are sequentially sleeved on the setting mandrel below the bearing assembly, the shear pawl is sleeved on the release pawl, the lower end of the positioning nipple is sleeved on the upper end of the ball seat nipple, the lower end of the ball seat nipple is sleeved on the outer surface of the upper end of the inner punching sleeve, the lower end of the inner punching sleeve and the sealing ring arranged under the inner punching sleeve are always sleeved on the upper end of the sealing mandrel, the inner surfaces of the inner punching sleeve and the sealing mandrel are connected with the outer surface of the inner punching sleeve nipple, the outer surface of the lower end of the sealing mandrel is connected with the inner surface of the outer flushing pipe nipple.
3. A pipe string as claimed in claim 2, wherein,
the locking piece support sleeve is sleeved on the setting mandrel, the lower end of the locking piece support sleeve is accommodated in the inner cavity of the upper end of the positioning nipple, the locking piece support sleeve is sleeved with a threaded locking piece, and a locking piece reed is arranged in the inner cavity between the locking piece support sleeve and the threaded locking piece.
4. A pipe string as claimed in claim 3, wherein,
the packer comprises a guide joint, a setting sleeve, an upper short joint, a packer mandrel, a rubber upper seat, a waveform spring, a lock ring, a rubber guide shoe, an inner rubber, an outer rubber, a rubber lower seat, a push ring, an upper cone, slips, a guide ring, a lower cone, a mandrel lock block, a stop sleeve, a packer outer cylinder, a switch sleeve, a bearing ring and a bottom joint,
the inner surface of the upper end of the guide joint is contacted with the outer surface of the setting sliding sleeve, the inner surface of the lower end 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, 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 nipple, the inner surfaces of the two ends of the upper nipple are respectively connected with the thread locking block and the outer surface of the upper end of the packer mandrel,
the packer mandrel sequentially penetrates through an inner cavity of a rubber sleeve upper seat, an inner rubber sleeve, a push ring, an upper cone, slips, a guide ring, a lower cone, a stop sleeve and a switch sleeve, the inner surface of the rubber sleeve upper seat is sequentially connected with the lower end of a setting sleeve, a lock ring and the outer surface of the packer mandrel, a waveform spring seat and a waveform spring are sequentially sleeved on the outer surface of the packer mandrel in the rubber sleeve upper seat from top to bottom, the lock ring is arranged below the waveform spring, both ends of the inner rubber sleeve are respectively sleeved with the outer rubber sleeve and the rubber sleeve guide shoe, the packer mandrel is connected with the lower cone through a mandrel locking 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 cylinder, the inner surface of the lower end of the packer outer cylinder is in threaded connection with the bottom joint, and the switch sleeve is arranged between the packer outer cylinder and the bearing ring.
5. A pipe string as claimed in claim 4, wherein,
the lower end of the setting mandrel is provided with a first spline groove,
the surface of the inner cavity of the shearing pawl is provided with a first internal spline and a first internal spline groove at intervals along the circumferential direction, the outer surface of the shearing pawl is provided with a first external spline at intervals along the circumferential direction,
the surface of the inner cavity of the release pawl is provided with second internal splines at intervals along the circumferential direction, the outer surface of the release pawl is provided with second external splines and second external spline grooves 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.
6. A pipe string as claimed in claim 5, wherein,
the positioning nipple is characterized in that a plurality of rectangular grooves and a plurality of water through grooves are formed in the positioning nipple, the plurality of rectangular grooves are formed in the upper end of the positioning nipple and are arranged at intervals along the circumferential direction, and the plurality of water through grooves are formed in the lower portion of the plurality of rectangular grooves and are arranged at intervals along the circumferential direction.
7. A pipe string as claimed in claim 6, wherein,
a plurality of first annular top surfaces and a plurality of support collar grooves are arranged on the outer surface of the lock block support sleeve along the longitudinal direction, the plurality of annular top surfaces and the plurality of support collar grooves are alternately arranged with each other, each of the plurality of first annular top surfaces is arranged along the circumferential direction of the lock block support sleeve, and each of the plurality of support collar grooves is arranged along the circumferential direction of the lock block support sleeve.
8. A pipe string as claimed in claim 7, wherein,
the screw thread locking piece is connected with the inner surface of the upper short joint through a screw thread pair, a plurality of second annular top surfaces, a plurality of locking piece annular grooves, cutting grooves and reed holes are arranged on the inner surface of the screw thread locking piece, the plurality of second annular top surfaces and the plurality of locking piece annular grooves are alternately arranged along the longitudinal direction of the screw thread locking piece, each of the plurality of second annular top surfaces is arranged along the circumferential direction of the screw thread locking piece, each of the plurality of locking piece annular grooves is arranged along the circumferential direction of the screw thread locking piece,
The reed hole is formed in one of the plurality of second annular top surfaces in the middle of the threaded lock block, and the cutting groove extends into the reed hole from the inner surface of the upper end of the threaded lock block along the longitudinal direction of the threaded lock block.
9. A pipe string as claimed in claim 8, wherein,
the first annular top surface in the lock block supporting sleeve and the second annular top surface in the threaded lock block correspond to each other, and the supporting collar-shaped groove of the lock block supporting sleeve and the lock block annular groove of the threaded lock block correspond to each other,
one end of the lock block reed is inserted into the reed hole of the threaded lock block, and the other end of the lock block reed passes through the cutting groove and is pressed at the upper end of the lock block supporting sleeve.
10. A pipe string as claimed in claim 9, wherein,
the slip is provided with annular tooth tips, first left cutting grooves and first right cutting grooves, the first left cutting grooves and the first right cutting grooves are alternately arranged with each other, the first left cutting grooves extend from a first end of the slip to a second end portion opposite to the first end, the first right cutting grooves extend from the second end of the slip to the first end portion, and the annular tooth tips are respectively arranged on the outer surfaces of the first end and the second end of the slip.
11. A pipe string as claimed in claim 10, wherein,
the slip is also provided with pin holes, the annular tooth tips are divided into a plurality of tooth tip sections by the first left cutting grooves, the pin holes are arranged on the tooth tip sections between the adjacent first left cutting grooves, the slip is connected with the upper cone through the pin holes, the inner surface of each tooth tip section of the plurality of tooth tip sections is provided with a conical surface with gradually reduced thickness towards the end part,
the slips are integrally formed, and the cross section of the annular tooth tip is corrugated.
12. A pipe string as claimed in claim 11, wherein,
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 longitudinal direction of the bearing ring, the third annular top surface is arranged along the circumferential direction of the bearing ring, the bearing ring annular groove is arranged along the circumferential direction of the bearing ring,
the second left and right slits of the carrier ring are alternately arranged with each other, the second left slit extending from an upper end of the carrier ring to a lower end portion of the carrier ring in a longitudinal direction of the carrier ring, and the right slit extending from a lower end of the carrier ring to an upper end portion of the carrier ring in the longitudinal direction of the carrier ring.
13. A pipe string as claimed in claim 12, wherein,
the switch sleeve is provided with a plurality of water through holes, water through grooves, a fourth annular top surface, a switch lantern ring groove and an unsealing step, the water through holes are arranged on the outer surface of the switch sleeve along the perimeter direction of the switch sleeve, the water through grooves are arranged at intervals along the perimeter direction of the switch sleeve, the water through holes are respectively communicated with corresponding water through grooves in the water through grooves, and the water through holes are positioned at the upper ends of the water through grooves and are perpendicular to the water through grooves;
the fourth annular top surface of switch sleeve and switch lantern ring groove set up on the internal surface of one end of switch sleeve and each other the interval sets up, the fourth annular top surface with the third annular top surface of carrier ring corresponds, the carrier ring slot with the switch lantern ring groove corresponds, the internal surface of the other end of switch sleeve is followed the radial direction inwards outstanding formation of switch sleeve the deblocking step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910121912.7A CN109653695B (en) | 2019-02-19 | 2019-02-19 | Bearing assembly for tubular column and tubular column |
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| CN201910121912.7A CN109653695B (en) | 2019-02-19 | 2019-02-19 | Bearing assembly for tubular column and tubular column |
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| CN109653695A CN109653695A (en) | 2019-04-19 |
| CN109653695B true CN109653695B (en) | 2024-03-08 |
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| CN112855065A (en) * | 2019-11-28 | 2021-05-28 | 中国石油化工股份有限公司 | Bidirectional anchoring detachable casing packer |
| CN111706279B (en) * | 2020-07-01 | 2022-04-22 | 杨国 | But setting instrument of hydraulic pressure and mechanical release |
| CN111734361A (en) * | 2020-07-01 | 2020-10-02 | 荆州市赛瑞能源技术有限公司 | Open-hole gravel packing sand prevention process and open-hole gravel packing sand prevention service pipe string |
| CN111706304B (en) * | 2020-07-01 | 2022-08-30 | 杨国 | Filling tool with reverse circulation function |
| CN111963087B (en) * | 2020-09-23 | 2024-03-22 | 重庆科技学院 | Hindered self-rotation type bottom hole multi-branch yield increasing tool guide shoe |
| RU2753915C1 (en) * | 2021-02-17 | 2021-08-24 | Общество с ограниченной ответственностью Научно-производственная фирма "Пакер" | Self-contained downhole packer |
| CN113445958B (en) * | 2021-05-26 | 2023-04-11 | 中国海洋石油集团有限公司 | Compression packer |
| CN113863899B (en) * | 2021-09-30 | 2023-03-28 | 新疆赢华石油技术服务有限公司 | Gas-proof sand-proof pumping aid for oil well |
| RU209572U1 (en) * | 2021-10-21 | 2022-03-17 | Общество с ограниченной ответственностью Научно-производственная фирма "Пакер" | Thrust packer |
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