CN110284852B - Multifunctional oil testing packer - Google Patents
Multifunctional oil testing packer Download PDFInfo
- Publication number
- CN110284852B CN110284852B CN201910710957.8A CN201910710957A CN110284852B CN 110284852 B CN110284852 B CN 110284852B CN 201910710957 A CN201910710957 A CN 201910710957A CN 110284852 B CN110284852 B CN 110284852B
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- China
- Prior art keywords
- sliding sleeve
- assembly
- sleeve
- travel switch
- differential pressure
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- 238000012360 testing method Methods 0.000 title claims abstract description 39
- 238000007789 sealing Methods 0.000 claims description 88
- 238000004873 anchoring Methods 0.000 claims description 25
- 229920001875 Ebonite Polymers 0.000 claims description 8
- 238000010008 shearing Methods 0.000 claims 2
- 241000191291 Abies alba Species 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 238000011084 recovery Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
- E21B33/1265—Packers; Plugs with fluid-pressure-operated elastic cup or skirt with mechanical slips
-
- 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
- E21B33/127—Packers; Plugs with inflatable sleeve
- E21B33/1277—Packers; Plugs with inflatable sleeve characterised by the construction or fixation of the sleeve
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/08—Valve arrangements for boreholes or wells in wells responsive to flow or pressure of the fluid obtained
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
-
- 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (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)
- Actuator (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention provides a multifunctional oil testing packer which is characterized by comprising a high-pressure packer assembly, a travel switch assembly and a differential pressure sliding sleeve assembly which are sequentially connected into a whole from top to bottom, wherein when the travel switch assembly is in a closed state, the travel switch assembly blocks the differential pressure sliding sleeve assembly from the high-pressure packer assembly, and when the travel switch assembly is in an open state, the differential pressure sliding sleeve assembly is communicated with the high-pressure packer assembly through the travel switch assembly; when the differential pressure sliding sleeve assembly is in a closed state, the differential pressure sliding sleeve assembly is blocked from the outside, and when the differential pressure sliding sleeve assembly is in an open state, the differential pressure sliding sleeve assembly is communicated with the outside. According to the multifunctional oil testing packer, the setting seat hanging is pressed in the pipe column, the pipe column does not need to be lifted, the oil testing hanging, the packer setting seat hanging, perforating and oil testing operations can be carried out after the underwater test tree is installed or the christmas tree is set, the operation is safer, and the operation time is saved.
Description
Technical Field
The invention relates to a packer.
Background
The conventional oil testing process firstly uses a perforating gun to perforate a target interval, and then a test tubing string is put down to perform oil testing operation. The RTTS packer can realize combined perforation and oil testing, realizes perforation and oil testing operation by one pipe column, and gradually becomes the most widely applied tool in the oil testing process. However, in the conventional RTTS packer oil testing process, a tubular column is required to be lifted and put down and rotated to realize setting and unsetting. After oil testing is finished, the RTTS packer is required to be recovered, then a lower cement plug is arranged, then a lower bridge plug seals and separates a lower layer, finally an upper cement plug is arranged, and the well is abandoned by taking down a tubular column for multiple passes, so that the operation time is long, the operation is complex, and the cost is high.
Disclosure of Invention
The purpose of the invention is that: a packer is provided for improving the efficiency of an oil testing process.
In order to achieve the above purpose, the technical scheme of the invention provides a multifunctional oil testing packer, which is characterized by comprising a high-pressure packer assembly, a travel switch assembly and a differential pressure sliding sleeve assembly which are sequentially connected into a whole from top to bottom, wherein: the state of the travel switch assembly and the pressure difference sliding sleeve assembly is switched between an off state and an on state; when the travel switch assembly is in a closed state, the travel switch assembly blocks the differential pressure sliding sleeve assembly from the high-pressure packer assembly, and when the travel switch assembly is in an open state, the differential pressure sliding sleeve assembly is communicated with the high-pressure packer assembly through the travel switch assembly; when the differential pressure sliding sleeve assembly is in a closed state, the differential pressure sliding sleeve assembly is blocked from the outside, and when the differential pressure sliding sleeve assembly is in an open state, the differential pressure sliding sleeve assembly is communicated with the outside;
the high-pressure packer assembly comprises a sealing cylinder assembly communicated with the travel switch assembly, an upper joint assembly is arranged at the upper end of the sealing cylinder assembly, the sealing cylinder assembly is connected with a service tool through the upper joint assembly, the lower end of the sealing cylinder assembly is connected with the travel switch assembly, a rubber cylinder combination is sleeved outside the sealing cylinder assembly, the upper end of the rubber cylinder combination is propped against a stepped bulge on the outer wall of the sealing cylinder assembly, the lower end of the rubber cylinder combination is propped against the upper end face of an upper piston sleeved outside the sealing cylinder assembly, the lower end of the upper piston is connected with the upper end of a lower piston sleeved outside the sealing cylinder assembly, and a retaining ring sleeve and a shear pin sleeve are sleeved outside the lower end of the lower piston in sequence from top to bottom; a hydraulic cylinder is arranged outside the upper piston and the lower piston, the upper end of the hydraulic cylinder is connected with the upper piston, and the lower end of the hydraulic cylinder is connected with the retaining ring jacket; a retaining ring is arranged in the retaining ring outer sleeve, and the outer part and the inner part of the retaining ring are respectively in threaded fit with the retaining ring outer sleeve and the lower piston; the shear pin sleeve is provided with a setting pin, and the relative position of the shear pin sleeve and the lower piston is fixed through the setting pin; the lower end of the lower piston is connected with a connecting sleeve sleeved outside the sealing cylinder assembly; the end face of the upper taper sleeve retaining ring sleeved outside the sealing cylinder component is tightly attached to the lower end face of the connecting sleeve, and the upper taper sleeve retaining ring is in threaded fit with the sealing cylinder component; the lower end of the connecting sleeve is connected with the upper end of the slip assembly, and the upper taper sleeve retaining ring is positioned at the inner side of the upper end of the slip assembly; the lower end of the slip assembly is connected with the upper end of an anchoring sliding sleeve sleeved outside the sealing cylinder assembly; a lower positioning ring is arranged between the anchoring sliding sleeve and the sealing cylinder assembly, and is sleeved outside the sealing cylinder assembly and used for limiting the upper limit of the anchoring sliding sleeve; the lower end of the anchoring sliding sleeve is connected with the upper end of the lower connecting sleeve; an anchoring sliding sleeve retaining ring is arranged between the lower connecting sleeve and the sealing cylinder assembly, the anchoring sliding sleeve retaining ring is sleeved outside the sealing cylinder assembly, and the upper end face of the anchoring sliding sleeve retaining ring is tightly attached to the lower end face of the anchoring sliding sleeve; the lower connecting sleeve is internally provided with a sealing sleeve, the sealing sleeve is sleeved outside the sealing cylinder assembly and covers the anchoring sliding sleeve retaining ring, and the sealing cylinder assembly is connected with the travel switch assembly through the lower connecting sleeve and the sealing sleeve.
Preferably, the travel switch assembly comprises a travel switch, a travel switch upper joint, a travel switch spring and a travel switch lower joint; the side surface of the travel switch is provided with a flow channel, the travel switch is arranged in an upper joint of the travel switch, when the travel switch assembly is in a closed state, the upper joint of the travel switch seals the flow channel on the side surface of the travel switch, when the travel switch assembly is in an open state, the upper joint of the travel switch opens the flow channel on the side surface of the travel switch, and the pressure difference sliding sleeve assembly is communicated with the high-pressure packer assembly through the flow channel; the upper end of the travel switch lower joint is connected with the travel switch upper joint, and the lower end is connected with the differential pressure sliding sleeve assembly; a travel switch spring is arranged in the travel switch lower connector, one end of the travel switch spring props against the travel switch, the other end props against a step in the travel switch lower connector, and the state of the travel switch assembly is kept in a closed state through the pretightening force of the travel switch spring.
Preferably, the differential pressure sliding sleeve assembly comprises a differential pressure sliding sleeve upper joint, a spring mandrel, a differential pressure sliding sleeve spring, a differential pressure sliding sleeve shell, a differential pressure sliding sleeve retaining ring pressure cap, a pressure cap differential pressure sliding sleeve pin, a differential pressure sliding sleeve retaining ring and a differential pressure sliding sleeve lower joint; the upper end and the lower end of the differential pressure sliding sleeve shell are respectively provided with a differential pressure sliding sleeve upper joint and a differential pressure sliding sleeve lower joint, and the differential pressure sliding sleeve upper joint is connected with the differential pressure sliding sleeve assembly; the side edge of the differential pressure sliding sleeve shell is provided with a channel communicated with the outside; a spring mandrel, a differential pressure sliding sleeve spring, a differential pressure sliding sleeve retaining ring pressure cap, a pressure cap differential pressure sliding sleeve pin and a differential pressure sliding sleeve retaining ring are arranged in the differential pressure sliding sleeve shell; the pressure difference sliding sleeve is fixed in the pressure difference sliding sleeve shell through a pressure cap pressure difference sliding sleeve pin, when the pressure difference sliding sleeve assembly is in a closed state, the pressure difference sliding sleeve seals a channel on the side surface of the pressure difference sliding sleeve shell, and when the pressure difference sliding sleeve assembly is in an open state, the pressure difference sliding sleeve opens the channel on the side surface of the pressure difference sliding sleeve shell; the spring mandrel and the pressure cap of the pressure difference sliding sleeve retaining ring are respectively arranged at the upper end and the lower end of the pressure difference sliding sleeve; the spring mandrel is sleeved with a differential pressure sliding sleeve spring, the upper end of the differential pressure sliding sleeve spring is propped against the spring mandrel, and the lower end of the differential pressure sliding sleeve spring is propped against the differential pressure sliding sleeve; the step of the pressure cap of the pressure difference sliding sleeve retaining ring is sleeved with the pressure difference sliding sleeve retaining ring.
Preferably, the sealing cylinder assembly comprises an upper sealing cylinder and a lower sealing cylinder, the upper end of the upper sealing cylinder is connected with the upper joint assembly, the lower end of the upper sealing cylinder is connected with the upper end of the lower sealing cylinder, and the lower end of the lower sealing cylinder is connected with the travel switch assembly.
Preferably, the upper joint assembly comprises a back-buckling screw sleeve, an upper joint and a back-buckling tension head, the back-buckling screw sleeve is arranged in the upper joint, the upper end of the sealing cylinder assembly is arranged in the upper joint, and the back-buckling tension head is arranged on the inner wall of the end part of the sealing cylinder assembly, which is positioned in the upper joint.
Preferably, the back-buckling threaded sleeve and the upper joint are fixed through a hand-off shear pin.
Preferably, the rubber cylinder combination comprises a soft rubber cylinder, wherein a hard rubber cylinder and a rubber cylinder guard ring are respectively arranged at the upper end and the lower end of the soft rubber cylinder, the hard rubber cylinder is attached to the soft rubber cylinder, and the rubber cylinder guard ring is attached to the hard rubber cylinder.
Preferably, the sealing cylinder assembly is provided with a pressure transmission hole, and the upper positioning ring is sleeved on the pressure transmission hole of the sealing cylinder assembly and used for positioning the mounting positions of the upper piston and the lower piston.
Preferably, the slip assembly comprises a cylindrical slip, an upper taper sleeve, a slip anti-rotation screw, a slip elastic hoop and a lower taper sleeve; the upper taper sleeve is connected with the lower end of the connecting sleeve, and the upper taper sleeve retaining ring is positioned at the inner side of the upper taper sleeve; the upper end of the cylindrical slip is sleeved on the upper taper sleeve, and the relative rotation of the cylindrical slip and the upper taper sleeve is limited by the slip anti-rotation screw; the middle part of the cylindrical slip is sleeved with a slip elastic hoop; the lower end of the cylindrical slip is sleeved on the lower taper sleeve.
Preferably, the lower taper sleeve is provided with a lower taper sleeve anti-rotation screw which is only used for limiting the relative rotation of the lower taper sleeve and the sealing cylinder assembly.
The multifunctional oil testing packer suitable for the exploratory well oil testing operation can realize completion of setting the packer, perforating, fracturing, testing and well abandoning in the same tripping operation, and can directly drill 2 cement plugs and well abandon under the condition that the packer is not recovered, so that the tripping operation of the original 2-3 times is shortened to one time, and a great amount of time and cost can be saved.
The invention has the following characteristics:
1) The multifunctional oil testing packer is hung through the pressing setting seat in the pipe column, the pipe column is not required to be lifted and lowered, the oil testing hanging, the packer setting seat hanging, perforation and oil testing operation can be carried out after the underwater test tree is installed or the christmas tree is set, the operation is safer, and the operation time is saved.
2) The multifunctional oil testing packer has high pressure resistance and high mechanical strength, can realize perforation oil testing combination, saves operation time and ensures safer testing operation.
3) The built-in travel switch and the packer form a well abandoning barrier, so that the operation steps of abandoning a well bridge plug once are saved.
4) The multifunctional oil testing packer integrates the high-pressure packer, the travel switch and the hydraulic sliding sleeve together to realize integrated design.
5) The hand-off of the sending tool can be selected from rotation, pressing, direct lifting and hand-off, with or without a deblocking tool, and the like, so that different process requirements are met.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 to 3 are partial structural schematic views of the present invention.
Detailed Description
The invention will be further illustrated with reference to specific examples. It is to be understood that these examples are illustrative of the present invention and are not intended to limit the scope of the present invention. Further, it is understood that various changes and modifications may be made by those skilled in the art after reading the teachings of the present invention, and such equivalents are intended to fall within the scope of the claims appended hereto.
As shown in fig. 1 to 3, the multifunctional oil testing packer provided by the invention comprises a back-buckling swivel nut 1, wherein the back-buckling swivel nut 1 is sleeved in an upper joint 2 and is fixed through a hand-off shear pin 3. The back-buckling tension head 4 is connected with the upper sealing cylinder 5 through threads, the upper end of the upper sealing cylinder 5 is connected with the upper joint 2 through threads, and the lower end of the upper sealing cylinder 5 is connected with the upper end of the lower sealing cylinder 6 through threads. The rubber cylinder combination is formed by the rubber cylinder guard ring 7, the hard rubber cylinder 8, the soft rubber cylinder 9, the hard rubber cylinder 8 and the rubber cylinder guard ring 7, and is sleeved on the lower sealing cylinder 6. The upper piston 10 is sleeved on the lower sealing cylinder 6, the upper positioning ring 11 is sleeved on the pressure transmission hole of the lower sealing cylinder 6, the installation positions of the upper piston 10 and the lower piston 12 are positioned, and the lower piston 12 is also sleeved on the lower sealing cylinder 6. The hydraulic cylinder 13 is sleeved on the lower sealing cylinder 6, and the upper end of the hydraulic cylinder is connected with the upper piston 10 through threads. The retaining ring 15 is mounted inside the retaining ring housing 14, the retaining ring housing 14 is sleeved on the lower piston 12, and the upper thread is connected with the lower thread of the hydraulic cylinder 13. The external thread of the retaining ring 15 is connected to the retaining ring housing 14 and the internal thread is connected to the serration thread on the lower piston 12. The shear pin sleeve 16 is sleeved on the lower piston 12, threads are connected with the retaining ring outer sleeve 15 in a threaded manner, a plurality of shear pin holes are formed in the shear pin sleeve 16, a setting pin 17 is arranged on the shear pin sleeve 16, and the relative positions of the shear pin sleeve 16 and the lower piston 12 are fixed. The connecting sleeve 18 is sleeved on the lower sealing cylinder 6 and is connected with the lower piston 12 through threads. The upper taper sleeve retaining ring 20 is sleeved on the lower sealing cylinder 6, the threads of the upper taper sleeve retaining ring 20 are tightly buckled on the sawtooth threads of the lower sealing cylinder 6, and the end face of the upper taper sleeve retaining ring 20 is tightly attached to the end face of the connecting sleeve 18. The cylindrical slips 21, the upper taper sleeve 19, the slip anti-rotation screw 22, the slip elastic hoop 23 and the lower taper sleeve 24 are formed into a slip assembly, the upper end of the cylindrical slips 21 is sleeved on the upper taper sleeve 19, the relative rotation of the cylindrical slips 21 and the upper taper sleeve 19 is limited through the slip anti-rotation screw 22, the slip elastic hoop 23 is sleeved outside the cylindrical slips 21, and the lower end of the cylindrical slips is sleeved on the lower taper sleeve 24 to form the slip assembly. The slip assembly is sleeved on the lower sealing cylinder 6, the upper taper sleeve 19 is connected with the connecting sleeve 18 through threads, the lower taper sleeve anti-rotation screw 25 is arranged on the lower taper sleeve 24, and the relative rotation of the lower taper sleeve 24 and the lower sealing cylinder 6 is limited, but the relative movement of the lower taper sleeve 24 and the lower sealing cylinder is not limited. The lower locating ring 27 is sleeved at a reserved position at the lower end of the lower sealing cylinder 6 to limit the upper limit of the anchoring sliding sleeve 26. An anchoring sliding sleeve 26 is sleeved on the lower sealing cylinder 6 and is connected with the lower taper sleeve 24 through threads. The anchoring sliding sleeve retaining ring 29 is sleeved on the lower sealing cylinder 6, and the end surface is tightly attached to the lower end surface of the anchoring sliding sleeve 26. The deblocking sleeve 30 is fitted over the lower sealing cylinder 6 and covers the anchoring slide retaining ring 29. The lower connecting sleeve 28 is sleeved outside the deblocking sleeve 30 and is connected with the anchoring sliding sleeve 26 through threads.
The travel switch 32, the travel switch upper connector 33, the travel switch spring 34, and the travel switch lower connector 35 constitute a travel switch assembly. The side of the travel switch 32 is provided with a flow passage, the travel switch 32 is sleeved by the travel switch upper connector 33, the lower end surface props against the step of the travel switch 32, and the side passage of the travel switch 32 is closed. The travel switch spring 34 is placed inside the travel switch lower joint 35, the travel switch lower joint 35 is connected with the travel switch upper joint 33 through threads, one end of the travel switch spring 34 props against the travel switch 32, and the travel switch is kept in the off state due to the pretightening force of the travel switch spring 34. The travel switch assembly is threadably connected to the lower connection sleeve 28 by a travel switch upper connector 33.
The differential pressure sliding sleeve upper joint 36, the spring mandrel 37, the differential pressure sliding sleeve spring 38, the differential pressure sliding sleeve shell 39, the differential pressure sliding sleeve 40, the differential pressure sliding sleeve retaining ring pressure cap 41, the pressure cap differential pressure sliding sleeve pin 42, the differential pressure sliding sleeve retaining ring 43 and the differential pressure sliding sleeve lower joint 44 form a differential pressure sliding sleeve assembly. The differential pressure sliding sleeve retaining ring 43 is sleeved on the step of the differential pressure sliding sleeve retaining ring pressing cap 41, and the differential pressure sliding sleeve retaining ring pressing cap 41 is connected with the differential pressure sliding sleeve 40 through threads. The differential pressure sliding sleeve retaining ring 43, the differential pressure sliding sleeve 40 and the differential pressure sliding sleeve retaining ring pressing cap 41 are all arranged inside the differential pressure sliding sleeve shell 39, and the positions are fixed through the differential pressure sliding sleeve shear pin 42. The differential pressure slide 40 covers the channels on the sides of the slide housing 39. The pressure difference sliding sleeve spring 38 is sleeved on the spring mandrel 37, the spring mandrel 37 is arranged inside the sliding sleeve shell 39, the other end of the pressure difference sliding sleeve spring 38 props against the pressure difference sliding sleeve 40, and the pressure difference sliding sleeve upper joint 36 is connected with the sliding sleeve shell 39 through threads. The differential pressure sleeve lower connector 44 is threadably coupled to the differential pressure sleeve housing 39.
The differential pressure sliding sleeve component is connected with the lower joint of the travel switch through threads.
The working principle of the invention is as follows:
after the packer assembly is assembled, the travel switch 32 is pushed downward by the service tool, compressing the travel switch spring 34 and maintaining the on state.
After the tool is in place, the pressure is suppressed from the center, when the pressure reaches the design pressure, the setting shear pin 17 is sheared under the action of the upper piston 10, the upper piston 10 drives the hydraulic cylinder 13, the retaining ring jacket 24, the retaining ring 15 and the shear pin ring 16 to move upwards to compress the rubber cylinder assembly, and the rubber cylinder assembly is inflated by the axial compression force to expand the annular space of the packer. While the setting shear pin 17 is sheared, the lower piston 12 pushes the connecting sleeve 18, the upper taper sleeve 19 and the upper taper sleeve retaining ring 20 to move downwards, the cylindrical slips 21 are limited by the lower taper sleeve 24 while being pushed by the upper taper sleeve 19 to move downwards, and can only be opened outwards along the inclined planes of the upper taper sleeve 19 and the lower taper sleeve 24 to bite the outer-layer sleeve, so that setting and hanging are completed. When the pressure is eliminated, the upper piston 10, the hydraulic cylinder 13 and the retaining ring outer sleeve 24 keep relative positions with the lower piston 12 under the limitation of the retaining ring 15, and the rubber cylinder assembly cannot retract after being compressed. The upper taper sleeve retaining ring 20 and the saw teeth of the lower sealing cylinder 6 can only move in one direction when being meshed, the upper taper sleeve 19 keeps relative position relation with the lower sealing cylinder 6 after moving, and the cylindrical slips 21 can be tightly meshed with the pipe wall after pressure is eliminated.
After the setting and hanging of the multifunctional oil testing packer are completed, the central pipe is continued to hold pressure, when the pressure reaches a design value, the differential pressure sliding sleeve pin 42 is sheared, the differential pressure sliding sleeve 40 moves downwards to the lower limit under the action of hydraulic pressure and the spring force of the differential pressure sliding sleeve spring 38, the channel of the differential pressure sliding sleeve shell 38 loses the shielding of the differential pressure sliding sleeve 40, the sliding sleeve is opened, and the channels above and below the packer are opened. At the same time, the differential pressure sliding sleeve retaining ring 43 locks the position of the differential pressure sliding sleeve 40, so that the differential pressure sliding sleeve 40 is always kept in an open state.
The back-fastening screw sleeve 1 reserves standard back-fastening of the saw teeth of the press and supports hydraulic or mechanical rotary hand-off of a service tool. When the setting hydraulic release and the suspension rotation release are failed, the pipe column can be directly lifted. When the upward axial tension load reaches a set value, the hand-off shear pin 3 is sheared, the back-buckling swivel nut 1 is disconnected from the multifunctional oil testing packer, and the pipe column above the packer can be taken out from the well bore. After the service tool leaves the packer, the travel switch 32 loses limit, is forced by the travel switch spring 34 to move upwards to be in a closed state, and blocks the channels above and below the packer again.
The packer recovery method comprises the following steps:
scheme a: when the lower end of the service tool is designed with a deblocking tension ring, and the cutting force of the deblocking sleeve shear pin 31 of the packer is exceeded by directly lifting the pipe column, the deblocking sleeve pin 31 is sheared, the deblocking sleeve 31 moves upwards, the anchoring sliding sleeve stop ring 29 loses limit, lifting is continued, the lower sealing cylinder 6 is lifted up through the back-buckling tension ring 4, parts on the lower sealing cylinder 6 move downwards relatively, the cylindrical slips 21 lose the support of the upper taper sleeve 19 and the lower taper sleeve 24, the cylindrical slips are retracted under the acting force of the slip elastic hoop 23, the rubber sleeve rebounds, and the packer assembly is continuously lifted up, so that recovery is completed.
Scheme B: if the deblocking tension ring is not installed on the service tool, the service tool can be directly lifted out of the wellhead by the aid of the hand-off method after the service tool is out of hand and perforation is completed, the packer is left in the well, and the later stage can be selected to be put into the recovery tool to deblock and recover the packer. The recovery principle is the same as in scheme a. The packer can be directly used as a bridge plug when being left underground, and the travel switch assembly is arranged in the packer and plays a role of a one-way valve when the packer is used for later cementing operation. When pressure exists above the packer, the travel switch 32 is acted by hydraulic pressure, and descends against the resistance of the travel switch spring, and the upper and lower channels of the packer are opened. When the upper pressure is removed, the travel switch 32 is moved upward against the force of the travel switch spring and the upper packer passageway is closed.
Claims (8)
1. The utility model provides a multi-functional oil testing packer which characterized in that, includes from top to bottom connects gradually into holistic high pressure packer subassembly, travel switch subassembly and pressure differential sliding sleeve subassembly, wherein: the state of the travel switch assembly and the pressure difference sliding sleeve assembly is switched between an off state and an on state; when the travel switch assembly is in a closed state, the travel switch assembly blocks the differential pressure sliding sleeve assembly from the high-pressure packer assembly, and when the travel switch assembly is in an open state, the differential pressure sliding sleeve assembly is communicated with the high-pressure packer assembly through the travel switch assembly; when the differential pressure sliding sleeve assembly is in a closed state, the differential pressure sliding sleeve assembly is blocked from the outside, and when the differential pressure sliding sleeve assembly is in an open state, the differential pressure sliding sleeve assembly is communicated with the outside;
the high-pressure packer assembly comprises a sealing cylinder assembly communicated with the travel switch assembly, an upper joint assembly is arranged at the upper end of the sealing cylinder assembly, the sealing cylinder assembly is connected with a service tool through the upper joint assembly, the lower end of the sealing cylinder assembly is connected with the travel switch assembly, a rubber cylinder combination is sleeved outside the sealing cylinder assembly, the upper end of the rubber cylinder combination is propped against a stepped bulge on the outer wall of the sealing cylinder assembly, the lower end of the rubber cylinder combination is propped against the upper end face of an upper piston (10) sleeved outside the sealing cylinder assembly, the lower end of the upper piston (10) is connected with the upper end of a lower piston (12) sleeved outside the sealing cylinder assembly, and a retaining ring sleeve (14) and a shear pin sleeve (16) are sequentially sleeved outside the lower end of the lower piston (12) from top to bottom; a hydraulic cylinder (13) is arranged outside the upper piston (10) and the lower piston (12), the upper end of the hydraulic cylinder (13) is connected with the upper piston (10), and the lower end is connected with a backstop ring outer sleeve (14); a retaining ring (15) is arranged in the retaining ring outer sleeve (14), and the outer part and the inner part of the retaining ring (15) are respectively in threaded fit with the retaining ring outer sleeve (14) and the lower piston (12); a setting pin (17) is arranged on the pin shearing sleeve (16), and the relative positions of the pin shearing sleeve (16) and the lower piston (12) are fixed through the setting pin (17); the lower end of the lower piston (12) is connected with a connecting sleeve (18) sleeved outside the sealing cylinder assembly; the end face of an upper taper sleeve retaining ring (20) sleeved outside the sealing cylinder assembly is tightly attached to the lower end face of the connecting sleeve (18), and the upper taper sleeve retaining ring (20) is in threaded fit with the sealing cylinder assembly; the lower end of the connecting sleeve (18) is connected with the upper end of the slip assembly, and the upper taper sleeve retaining ring (20) is positioned at the inner side of the upper end of the slip assembly; the lower end of the slip assembly is connected with the upper end of an anchoring sliding sleeve (26) sleeved outside the sealing cylinder assembly; a lower positioning ring (27) is arranged between the anchoring sliding sleeve (26) and the sealing cylinder assembly, and the lower positioning ring (27) is sleeved outside the sealing cylinder assembly and used for limiting the upper limit of the anchoring sliding sleeve (26); the lower end of the anchoring sliding sleeve (26) is connected with the upper end of the lower connecting sleeve (28); an anchoring sliding sleeve retaining ring (29) is arranged between the lower connecting sleeve (28) and the sealing cylinder assembly, the anchoring sliding sleeve retaining ring (29) is sleeved outside the sealing cylinder assembly, and the upper end surface of the anchoring sliding sleeve retaining ring (29) is tightly attached to the lower end surface of the anchoring sliding sleeve (26); a sealing sleeve (30) is arranged in the lower connecting sleeve (28), the sealing sleeve (30) is sleeved outside the sealing sleeve assembly and covers the anchoring sliding sleeve retaining ring (29), and the sealing sleeve assembly is connected with the travel switch assembly through the lower connecting sleeve (28) and the sealing sleeve (30);
the travel switch assembly comprises a travel switch (32), a travel switch upper joint (33), a travel switch spring (34) and a travel switch lower joint (35); the side of the travel switch (32) is provided with a flow channel, the travel switch (32) is arranged in an upper joint (33) of the travel switch, when the travel switch assembly is in a closed state, the upper joint (33) of the travel switch seals the flow channel on the side of the travel switch (32), when the travel switch assembly is in an open state, the upper joint (33) of the travel switch opens the flow channel on the side of the travel switch (32), and the pressure difference sliding sleeve assembly is communicated with the high-pressure packer assembly through the flow channel; the upper end of a travel switch lower joint (35) is connected with a travel switch upper joint (33), and the lower end is connected with the pressure difference sliding sleeve assembly; a travel switch spring (34) is arranged in the travel switch lower joint (35), one end of the travel switch spring (34) props against the travel switch (32), the other end props against a step in the travel switch lower joint (35), and the state of the travel switch assembly is kept in a closed state through the pretightening force of the travel switch spring (34);
the differential pressure sliding sleeve assembly comprises a differential pressure sliding sleeve upper joint (36), a spring mandrel (37), a differential pressure sliding sleeve spring (38), a differential pressure sliding sleeve shell (39), a differential pressure sliding sleeve (40), a differential pressure sliding sleeve retaining ring pressure cap (41), a pressure cap differential pressure sliding sleeve pin (42), a differential pressure sliding sleeve retaining ring (43) and a differential pressure sliding sleeve lower joint (44); the upper end and the lower end of the differential pressure sliding sleeve shell (39) are respectively provided with a differential pressure sliding sleeve upper joint (36) and a differential pressure sliding sleeve lower joint (44), and the differential pressure sliding sleeve upper joint (36) is connected with the differential pressure sliding sleeve assembly; the side edge of the differential pressure sliding sleeve shell (39) is provided with a channel communicated with the outside; a spring mandrel (37), a differential pressure sliding sleeve spring (38), a differential pressure sliding sleeve (40), a differential pressure sliding sleeve retaining ring pressure cap (41), a pressure cap differential pressure sliding sleeve pin (42) and a differential pressure sliding sleeve retaining ring (43) are arranged in the differential pressure sliding sleeve shell (39); the pressure difference sliding sleeve (40) is fixed in the pressure difference sliding sleeve shell (39) through a pressure cap pressure difference sliding sleeve pin (42), when the pressure difference sliding sleeve assembly is in a closed state, the pressure difference sliding sleeve (40) seals a channel on the side surface of the pressure difference sliding sleeve shell (39), and when the pressure difference sliding sleeve assembly is in an open state, the pressure difference sliding sleeve (40) opens the channel on the side surface of the pressure difference sliding sleeve shell (39); the spring mandrel (37) and the differential pressure sliding sleeve retaining ring pressing cap (41) are respectively arranged at the upper end and the lower end of the differential pressure sliding sleeve (40); a differential pressure sliding sleeve spring (38) is sleeved outside the spring mandrel (37), the upper end of the differential pressure sliding sleeve spring (38) is propped against the spring mandrel (37), and the lower end of the differential pressure sliding sleeve spring is propped against the differential pressure sliding sleeve (40); the step of the differential pressure sliding sleeve retaining ring pressing cap (41) is sleeved with a differential pressure sliding sleeve retaining ring (43).
2. The multifunctional oil testing packer of claim 1, wherein the sealing barrel assembly comprises an upper sealing barrel (5) and a lower sealing barrel (6), the upper end of the upper sealing barrel (5) is connected with the upper joint assembly, the lower end is connected with the upper end of the lower sealing barrel (6), and the lower end of the lower sealing barrel (6) is connected with the travel switch assembly.
3. The multifunctional oil testing packer of claim 1, wherein the upper joint assembly comprises a back-buckling screw sleeve (1), an upper joint (2) and a back-buckling tension head (4), the back-buckling screw sleeve (1) is arranged in the upper joint (2), the upper end of the sealing cylinder assembly is arranged in the upper joint (2), and the back-buckling tension head (4) is arranged on the inner wall of the end part of the sealing cylinder assembly, which is positioned in the upper joint (2).
4. A multifunctional oil testing packer according to claim 3, characterized in that the back-up thread sleeve (1) is fixed to the upper joint (2) by means of a hand-off shear pin (3).
5. The multifunctional oil testing packer of claim 1, wherein the rubber sleeve combination comprises a soft rubber sleeve (9), a hard rubber sleeve (8) and a rubber sleeve guard ring (7) are respectively arranged at the upper end and the lower end of the soft rubber sleeve (9), the hard rubber sleeve (8) is attached to the soft rubber sleeve (9), and the rubber sleeve guard ring (7) is attached to the hard rubber sleeve (8).
6. A multifunctional oil testing packer according to claim 1, characterized in that a pressure transmitting hole is provided in the sealing cylinder assembly, and an upper positioning ring (11) is sleeved on the pressure transmitting hole of the sealing cylinder assembly for positioning the mounting positions of the upper piston (10) and the lower piston (12).
7. The multifunctional oil testing packer of claim 1, wherein the slip assembly comprises a cylindrical slip (21), an upper cone sleeve (19), a slip anti-rotation screw (22), a slip elastic collar (23) and a lower cone sleeve (24); the upper taper sleeve (19) is connected with the lower end of the connecting sleeve (18), and the upper taper sleeve retaining ring (20) is positioned at the inner side of the upper taper sleeve (19); the upper end of the cylindrical slip (21) is sleeved on the upper taper sleeve (19), and the relative rotation of the cylindrical slip (21) and the upper taper sleeve (19) is limited by the slip anti-rotation screw (22); the middle part of the cylindrical slip (21) is sleeved with a slip elastic hoop (23); the lower end of the cylindrical slip (21) is sleeved on the lower taper sleeve (24).
8. A multifunctional oil testing packer according to claim 7, characterized in that a lower cone sleeve anti-rotation screw (25) is provided on said lower cone sleeve (24) for limiting the relative rotation of the lower cone sleeve (24) and said sealing cylinder assembly only.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910710957.8A CN110284852B (en) | 2019-08-02 | 2019-08-02 | Multifunctional oil testing packer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910710957.8A CN110284852B (en) | 2019-08-02 | 2019-08-02 | Multifunctional oil testing packer |
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| CN110284852B true CN110284852B (en) | 2024-01-09 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3860068A (en) * | 1973-11-01 | 1975-01-14 | Dresser Ind | Well packer zone activated valve |
| CN202900205U (en) * | 2012-10-23 | 2013-04-24 | 中国石油天然气股份有限公司 | Multifunctional formation testing well completion integral pipe column |
| CN104153751A (en) * | 2014-08-22 | 2014-11-19 | 安东石油技术（集团）有限公司 | Static pressure differential pressure sliding sleeve |
| CN210622762U (en) * | 2019-08-02 | 2020-05-26 | 思达斯易能源技术(集团)有限公司 | Multifunctional oil testing packer |
-
2019
- 2019-08-02 CN CN201910710957.8A patent/CN110284852B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3860068A (en) * | 1973-11-01 | 1975-01-14 | Dresser Ind | Well packer zone activated valve |
| CN202900205U (en) * | 2012-10-23 | 2013-04-24 | 中国石油天然气股份有限公司 | Multifunctional formation testing well completion integral pipe column |
| CN104153751A (en) * | 2014-08-22 | 2014-11-19 | 安东石油技术（集团）有限公司 | Static pressure differential pressure sliding sleeve |
| CN210622762U (en) * | 2019-08-02 | 2020-05-26 | 思达斯易能源技术(集团)有限公司 | Multifunctional oil testing packer |
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| CN110284852A (en) | 2019-09-27 |
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