CN114934755A - Composite particle sealing device for oil pumping unit wellhead and use method thereof - Google Patents
Composite particle sealing device for oil pumping unit wellhead and use method thereof Download PDFInfo
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- CN114934755A CN114934755A CN202210877312.5A CN202210877312A CN114934755A CN 114934755 A CN114934755 A CN 114934755A CN 202210877312 A CN202210877312 A CN 202210877312A CN 114934755 A CN114934755 A CN 114934755A
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- blowout prevention
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- 238000007789 sealing Methods 0.000 title claims abstract description 119
- 238000005086 pumping Methods 0.000 title claims abstract description 30
- 239000011246 composite particle Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000002131 composite material Substances 0.000 claims abstract description 102
- 230000002265 prevention Effects 0.000 claims abstract description 99
- 230000006835 compression Effects 0.000 claims description 96
- 238000007906 compression Methods 0.000 claims description 96
- 239000002245 particle Substances 0.000 claims description 51
- 150000001875 compounds Chemical class 0.000 claims description 17
- 238000005507 spraying Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 description 6
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 5
- 235000017491 Bambusa tulda Nutrition 0.000 description 5
- 241001330002 Bambuseae Species 0.000 description 5
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 5
- 239000011425 bamboo Substances 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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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
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
-
- 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
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
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- 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)
- Sealing Devices (AREA)
Abstract
The invention provides a composite particle sealing device of a wellhead of a pumping unit and a using method thereof, which relate to the technical field of wellhead sealing and comprise a composite polished rod, wherein a blowout prevention assembly for preventing blowout during fracture is slidably sleeved on the composite polished rod, the lower end of the blowout prevention assembly is connected with a sealing barrel part for sealing a sliding gap at the outer side of the composite polished rod, and the lower end of the sealing barrel part is provided with a follow-up deviator for moving along with the composite polished rod; the composite polished rod penetrates through the whole equipment, the equipment is installed on an oil outlet pipe on the ground through the follow-up deflector at the lower end, then the limit control rotating handle at the upper end is rotated to limit the moving range of the composite polished rod inside, and then the sealing control rotating handle at the upper end is rotated to extrude and seal the side surface of the composite polished rod so as to prevent oil pumped out at the lower end from leaking out.
Description
Technical Field
The invention relates to the technical field of wellhead sealing, in particular to a composite particle sealing device for a wellhead of an oil pumping unit and a using method thereof.
Background
The oil pumping machine is a machine for exploiting oil, and is commonly called a head knocking machine. The pumping unit is the most main lifting equipment in the rod pumping system. According to whether there is a walking beam, it can be divided into a walking beam type pumping unit and a non-walking beam type pumping unit.
In the existing blowout prevention structure of the sealing device, because the composite polished rod is broken, the pressure of the sprayed oil is too high, the blowout prevention ball can form an oil column before reaching the blowout prevention ball base to push the blowout prevention ball away, and an oil port cannot be sealed in time, so that waste and environmental pollution are caused.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a composite particle sealing device for a wellhead of a pumping unit and a using method thereof, which solve the problems that the inlet sealing device is usually arranged at the inlet of a pumping plug of which the lower end of the pumping unit is deep into the bottom surface, and the oil pressure sprayed out is too high when a composite polished rod is broken in the blowout prevention structure of the existing sealing device, so that the blowout prevention ball can form an oil column before reaching a blowout prevention ball base, the blowout prevention ball is pushed away, the oil port cannot be sealed in time, and waste and environmental pollution are caused.
In order to realize the purpose, the invention is realized by the following technical scheme: the composite particle sealing device for the wellhead of the oil pumping unit comprises a composite polished rod, wherein a blowout prevention assembly used for preventing blowout due to fracture is sleeved on the composite polished rod in a sliding mode, the lower end of the blowout prevention assembly is connected with a sealing barrel part used for sealing a sliding gap on the outer side of the composite polished rod, and a follow-up deflector used for following the composite polished rod to move is arranged at the lower end of the sealing barrel part.
Preferably, the blowout preventer assembly comprises: the blowout prevention device comprises a blowout prevention assembly shell, a pressure relief piece barrel, a blowout prevention ball base, a pear-shaped blowout prevention cavity, a blowout prevention ball, a pressure relief hole, a pressure relief sliding sealing plug, a guide rod and a pressure-relieving spring;
a blowout prevention assembly shell is slidably sleeved on the outer side of the composite polished rod, a blowout prevention ball base is sleeved on the upper end of the blowout prevention assembly shell and positioned on the outer side of the composite polished rod, and pressure relief piece barrels are uniformly arranged at two ends of the outer side of the blowout prevention assembly shell;
a pear-shaped blowout preventing cavity is formed in the shell of the blowout preventing assembly, and a blowout preventing ball is movably arranged in the pear-shaped blowout preventing cavity;
two pressure release hole, two have all been seted up to pressure release spare section of thick bamboo outer end all slide in the pressure release spare section of thick bamboo and be provided with pressure release slip sealing plug, two pressure release slip sealing plug outer end homogeneous body is connected with the guide bar, two the cover is equipped with the pressure receiving spring on the guide bar.
Preferably, the pear-shaped blowout prevention cavity is communicated with both of the two pressure relief piece barrels.
Preferably, the sealing cartridge comprises: the device comprises a sealing adjusting sleeve, an external compression top block, an internal compression top block, a limiting adjusting sleeve, a particle compression gasket, rubber sealing particles, a particle compression top ring, a first limiting rubber ring compression cylinder, a first limiting rubber ring, an internal limiting sleeve, a second limiting rubber ring compression cylinder, a second limiting rubber ring top ring, an internal limiting inner cylinder, a sealing handle mounting seat and a limiting handle mounting seat;
the lower end of the shell of the blowout prevention assembly is integrally connected with a sealing adjusting sleeve, a built-in compression ejector block is arranged in the sealing adjusting sleeve and positioned outside the composite polished rod, and an external compression ejector block is sleeved outside the built-in compression ejector block;
two particle compression gaskets are arranged at the lower end of the built-in compression top block, a plurality of rubber sealing particles are arranged between the two particle compression gaskets, a particle compression top ring is arranged at the lower end of the particle compression gasket at the lower end, and limit adjusting sleeves are sleeved on the outer sides of the particle compression gasket, the rubber sealing particles and the particle compression top ring;
the inner side of the lower end of the limiting adjusting sleeve is provided with an internal limiting sleeve, the upper end of the inner side of the internal limiting sleeve and the outer side of the composite polished rod are slidably sleeved with a first limiting rubber ring compression cylinder, and the lower end of the first limiting rubber ring compression cylinder is provided with a plurality of first limiting rubber rings;
the inner side of the lower end of the limiting adjusting sleeve is provided with an internal limiting inner cylinder, the upper end of the inner side of the internal limiting inner cylinder is slidably sleeved with a second limiting rubber ring compression cylinder positioned on the outer side of the composite polished rod, the lower end of the second limiting rubber ring compression cylinder is provided with a plurality of second limiting rubber rings, and the lower end of each second limiting rubber ring is provided with a second limiting rubber ring top ring;
the two ends of the outer side of the sealing adjusting sleeve are uniformly provided with sealing handle mounting seats, and the two ends of the outer side of the limiting adjusting sleeve are uniformly provided with limiting handle mounting seats.
Preferably, the sealing adjusting sleeve is in rotational fit with the limiting adjusting sleeve through threads;
the limit adjusting sleeve is in rotational fit with the built-in limit sleeve through threads;
the built-in limiting sleeve is in rotational fit with the built-in limiting inner cylinder through threads.
Preferably, two sealing control rotating handles are respectively installed in the two sealing handle installation seats, and two limiting control rotating handles are respectively installed in the two limiting handle installation seats.
Preferably, the follower shifter includes: the device comprises an offset connecting cylinder, an offset spherical shell, an offset device shell, an upper ball seat, a lower ball seat, a sealing ring, a limiting snap ring and an upper oil pipe connecting cylinder;
the lower end of the built-in limiting inner cylinder is integrally connected with an offset connecting cylinder, the lower end of the offset connecting cylinder is integrally connected with an offset spherical shell, an upper ball seat and a lower ball seat are slidably sleeved outside the offset spherical shell, and sealing rings are arranged on the offset spherical shell and the lower ball seat;
an upper oil pipe connecting cylinder is arranged at the lower end of the lower ball seat, and a limiting snap ring is clamped between the upper end of the upper oil pipe connecting cylinder and the lower ball seat;
the upper ball seat, the lower ball seat and the upper oil pipe connecting cylinder are sleeved with a drift device shell.
Preferably, the upper ball seat is in abutting contact with the bottom surface of the upper end of the deflector housing.
Preferably, the composite polished rod is not coincident with the deflector housing axis.
Meanwhile, the invention also provides a using method of the composite particle sealing device for the wellhead of the oil pumping unit, which comprises the following specific steps:
s1: firstly, the composite polished rod penetrates through the whole equipment, then the equipment is installed on an oil outlet pipe on the ground through a follow-up deflector at the lower end, then a limit control rotating handle at the upper end is rotated to limit the moving range of the composite polished rod inside, and then a sealing control rotating handle at the upper part is rotated to extrude and seal the side surface of the composite polished rod so as to prevent oil pumped out at the lower end from leaking out;
s2: the upper end of the oil pipe is provided with the blowout prevention assembly, so that the oil pipe can be sealed when oil at the lower end is sprayed out after the composite polished rod is broken when the composite polished rod is pumped out, the blowout prevention ball in the composite polished rod is pushed after the oil is sprayed out from the lower end, the blowout prevention ball is propped against an outlet at the lower end of the blowout prevention ball base, when the oil at the lower end is sprayed out, the sprayed pressure is too large, the blowout prevention ball can form an oil column before reaching the blowout prevention ball base and can be pushed away, at the moment, the compression springs are pushed towards two sides through the pressure relief sliding sealing plugs at the two ends, the oil spraying speed is reduced in a period of time, the blowout prevention ball base is blocked for the blowout prevention ball, and the blowout prevention effect can be better played;
when the thread rotates to the bottom, the second limiting rubber ring compression cylinder is pushed to extrude the second limiting rubber ring through the thread rotation of the lower end of the built-in limiting sleeve, so that two-point limitation is formed, and the composite polished rod is better limited;
s3: the rotary handle is controlled through the rotary seal, so that the seal adjusting sleeve at the upper end rotates through the threads at the lower end, the external compression top block and the internal compression top block are pushed to extrude rubber sealing particles at the lower end, and gaps are more compact when the rubber sealing particles are compressed due to the small diameter of the rubber sealing particles, so that the rubber sealing particles can be better sealed;
s4: when compound polished rod is acted by the equipment of upper end, when carrying out the operation of sliding from top to bottom, because the operation orbit of upper end equipment, can make compound polished rod produce lateral shifting to can drive ball seat, lower ball seat at the ware shell internal rotation of offseting through the skew spherical shell, because ware shell upper end opening is big, thereby can follow compound polished rod and carry out the skew, prevent compound polished rod atress fracture.
The invention provides a composite particle sealing device for a wellhead of an oil pumping unit and a using method thereof. The method has the following beneficial effects:
the composite polished rod penetrates through the whole equipment, the equipment is installed on an oil outlet pipe on the ground through the follow-up deflector at the lower end, then the limit control rotating handle at the upper end is rotated to limit the moving range of the composite polished rod inside, and then the sealing control rotating handle at the upper part is rotated to extrude and seal the side surface of the composite polished rod so as to prevent oil pumped out at the lower end from leaking out;
the upper end of the oil pipe is provided with the blowout prevention assembly, so that the oil pipe can be sealed when oil at the lower end is sprayed out after the composite polished rod is broken when the composite polished rod is pumped out, the blowout prevention ball in the composite polished rod is pushed after the oil is sprayed out from the lower end, the blowout prevention ball is propped against an outlet at the lower end of the blowout prevention ball base, when the oil at the lower end is sprayed out, the sprayed pressure is too large, the blowout prevention ball can form an oil column before reaching the blowout prevention ball base and can be pushed away, at the moment, the compression springs are pushed towards two sides through the pressure relief sliding sealing plugs at the two ends, the oil spraying speed is reduced in a period of time, the blowout prevention ball base is blocked for the blowout prevention ball, and the blowout prevention effect can be better played;
when the threads rotate to the bottom, the second limiting rubber ring compression cylinder is pushed to extrude the second limiting rubber ring through the rotation of the threads at the lower end of the built-in limiting sleeve to form two-point limitation, so that the composite polished rod is better limited;
the rotary handle is controlled through the rotary seal, so that the seal adjusting sleeve at the upper end rotates through the threads at the lower end, the external compression top block and the internal compression top block are pushed to extrude rubber sealing particles at the lower end, and gaps are more compact when the rubber sealing particles are compressed due to the small diameter of the rubber sealing particles, so that the rubber sealing particles can be better sealed;
when compound polished rod is acted by the equipment of upper end, when carrying out the operation of sliding from top to bottom, because the operation orbit of upper end equipment, can make compound polished rod produce lateral shifting to can drive ball seat, lower ball seat at the ware shell internal rotation of offseting through the skew spherical shell, because ware shell upper end opening is big, thereby can follow compound polished rod and carry out the skew, prevent compound polished rod atress fracture.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of a blowout preventer assembly according to the present invention;
FIG. 3 is a schematic side view of a blowout preventer assembly according to the present invention;
FIG. 4 is a schematic cross-sectional view taken along line a-a of FIG. 3 according to the present invention;
FIG. 5 is a schematic front view of the present invention;
FIG. 6 is a cross-sectional view taken along line b-b of FIG. 5 according to the present invention;
FIG. 7 is an enlarged view of the structure of FIG. 6 at A according to the present invention;
FIG. 8 is a schematic side view of the present invention;
FIG. 9 is a cross-sectional view taken along line c-c of FIG. 8 according to the present invention;
fig. 10 is an enlarged view of the structure at B in fig. 9 according to the present invention.
Wherein, 1, compound polished rod; 2. a blowout prevention assembly; 201. a blowout preventer assembly housing; 202. a pressure relief piece cartridge; 203. a blowout prevention ball base; 204. a pear-shaped blowout prevention cavity; 205. a blowout prevention ball; 206. a pressure relief vent; 207. a pressure relief sliding seal plug; 208. a guide bar; 209. a compression spring; 3. sealing the cartridge; 301. sealing the adjusting sleeve; 302. an external compression top block; 303. a compression top block is arranged inside; 304. a limiting and adjusting sleeve; 305. a pellet compression spacer; 306. rubber seal particles; 307. a pellet compression top ring; 308. a first limiting rubber ring compression cylinder; 309. a first limiting rubber ring; 310. a limit sleeve is arranged inside; 311. a second limiting rubber ring compression cylinder; 312. a second limiting rubber ring; 313. a second limit rubber ring top ring; 314. a limit inner cylinder is arranged inside; 315. a sealing handle mounting seat; 316. a limiting handle mounting seat; 4. a sealed control rotary handle; 5. the rotating handle is controlled in a limiting way; 6. a follow-up shifter; 601. an offset connector barrel; 602. offsetting the spherical shell; 603. a deflector housing; 604. an upper ball seat; 605. a ball seat is arranged; 606. a seal ring; 607. a limit snap ring; 608. and an oil feeding pipe connecting cylinder.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the composite particle sealing device for the wellhead of the pumping unit comprises a composite polished rod 1, wherein a blowout prevention assembly 2 for preventing blowout during fracture is slidably sleeved on the composite polished rod 1, the lower end of the blowout prevention assembly 2 is connected with a sealing cylinder piece 3 for sealing a sliding gap outside the composite polished rod 1, and the lower end of the sealing cylinder piece 3 is provided with a follow-up deflector 6 for moving along with the composite polished rod 1.
Through foretell technical scheme, at first through passing whole equipment with compound polished rod 1, follow-up deviator 6 of rethread lower extreme installs equipment on the play oil pipe on ground, then rotatory upper end's rotatory handle 5 of spacing control, restricts the home range of compound polished rod 1 of inside, and rotatory sealed control of top is rotatory handle 4 again, carries out extrusion seal to compound polished rod 1 side, prevents that the oil that the lower extreme was taken out from leaking out.
As shown in the drawings, the blowout preventer assembly 2 comprises: a blowout preventer assembly housing 201, a pressure relief barrel 202, a blowout preventer ball seat 203, a pear-shaped blowout preventer cavity 204, a blowout preventer ball 205, a pressure relief bore 206, a pressure relief sliding seal plug 207, a guide rod 208, and a compression spring 209; a blowout prevention assembly shell 201 is slidably sleeved on the outer side of the composite polished rod 1, a blowout prevention ball base 203 is sleeved at the upper end of the blowout prevention assembly shell 201 and positioned on the outer side of the composite polished rod 1, and pressure relief piece barrels 202 are uniformly arranged at two ends of the outer side of the blowout prevention assembly shell 201; a pear-shaped blowout preventing cavity 204 is formed in the blowout preventing component shell 201, and a blowout preventing ball 205 is movably arranged in the pear-shaped blowout preventing cavity 204; two pressure release hole 206 has all been seted up to pressure release section of thick bamboo 202 outer end, two all slide in the pressure release section of thick bamboo 202 and be provided with pressure release slip sealing plug 207, two pressure release slip sealing plug 207 outer end homogeneous is connected with guide bar 208, two the cover is equipped with pressure receiving spring 209 on the guide bar 208, pear-shaped prevents that spray chamber 204 and two pressure release section of thick bamboo 202 all communicate.
Through the technical scheme, the blowout prevention assembly 2 is arranged at the upper end, so that an oil pipe can be prevented from being sealed when oil is sprayed out from the lower end after the composite polished rod 1 is broken during oil pumping, firstly, when the composite polished rod 1 is broken, the blowout prevention ball 205 in the composite polished rod is pushed after the oil is sprayed out from the lower end, the blowout prevention ball 205 is propped against an outlet at the lower end of the blowout prevention ball base 203, when the oil is sprayed out from the lower end, the sprayed pressure is too high, an oil column can be formed before the blowout prevention ball 205 reaches the blowout prevention ball base 203, the blowout prevention ball 205 is pushed open, at the moment, the compression springs 209 are pushed towards two sides through the pressure relief sealing plug sliding 207 at two ends, the oil spraying speed is reduced for a period of time, the blowout prevention ball 205 is vacated for blocking the blowout prevention ball base 203, and the blowout prevention effect of blowout prevention can be better achieved.
As shown in the accompanying drawings, the sealing cartridge 3 includes: the device comprises a sealing adjusting sleeve 301, an external compression top block 302, an internal compression top block 303, a limiting adjusting sleeve 304, a particle compression gasket 305, rubber sealing particles 306, a particle compression top ring 307, a first limiting rubber ring compression cylinder 308, a first limiting rubber ring 309, an internal limiting sleeve 310, a second limiting rubber ring compression cylinder 311, a second limiting rubber ring 312, a second limiting rubber ring top ring 313, an internal limiting inner cylinder 314, a sealing handle mounting seat 315 and a limiting handle mounting seat 316; the lower end of the blowout preventer assembly shell 201 is integrally connected with a sealing adjusting sleeve 301, an internal compression ejector block 303 is arranged in the sealing adjusting sleeve 301 and positioned outside the composite polished rod 1, and an external compression ejector block 302 is sleeved outside the internal compression ejector block 303; two particle compression gaskets 305 are arranged at the lower end of the built-in compression top block 303, a plurality of rubber sealing particles 306 are arranged between the two particle compression gaskets 305, a particle compression top ring 307 is arranged at the lower end of the particle compression gasket 305 at the lower end, and a limiting adjusting sleeve 304 is sleeved outside the particle compression gasket 305, the rubber sealing particles 306 and the particle compression top ring 307; the inner side of the lower end of the limiting adjusting sleeve 304 is provided with a built-in limiting sleeve 310, the upper end of the inner side of the built-in limiting sleeve 310 and the outer side of the composite polished rod 1 are slidably sleeved with a first limiting rubber ring compression cylinder 308, and the lower end of the first limiting rubber ring compression cylinder 308 is provided with a plurality of first limiting rubber rings 309; the inner side of the lower end of the limiting adjusting sleeve 304 is provided with a built-in limiting inner cylinder 314, the upper end of the inner side of the built-in limiting inner cylinder 314 and the outer side of the composite polished rod 1 are slidably sleeved with a second limiting rubber ring compression cylinder 311, the lower end of the second limiting rubber ring compression cylinder 311 is provided with a plurality of second limiting rubber rings 312, and the lower end of each second limiting rubber ring 312 is provided with a second limiting rubber ring top ring 313; the two ends of the outer side of the sealing adjusting sleeve 301 are uniformly provided with sealing handle installation seats 315, the two ends of the outer side of the limiting adjusting sleeve 304 are uniformly provided with limiting handle installation seats 316, and the sealing adjusting sleeve 301 and the limiting adjusting sleeve 304 are in rotating fit through threads; the limit adjusting sleeve 304 is in rotational fit with the built-in limit sleeve 310 through threads; the internal limiting sleeve 310 and the internal limiting inner cylinder 314 are in rotating fit through threads, two sealing control rotating handles 4 are respectively installed in the two sealing handle installation seats 315, and two limiting control rotating handles 5 are respectively installed in the two limiting handle installation seats 316.
Through the technical scheme, the lower end of the limiting adjusting sleeve 304 is rotated through the threads by rotating the limiting control rotating handle 5, so that the first limiting rubber ring compression cylinder 308 can be pushed to extrude the first limiting rubber ring 309 to transversely deform the first limiting rubber ring, the first limiting rubber ring is inwards abutted against the composite polished rod 1, the transverse moving range of the composite polished rod 1 is reduced, when the threads rotate to the bottom, the second limiting rubber ring compression cylinder 311 is pushed to extrude the second limiting rubber ring 312 through the rotation of the threads at the lower end of the built-in limiting sleeve 310, two-point limitation is formed, and the composite polished rod 1 is better limited;
through rotatory sealed control rotation handle 4, make the sealed adjusting sleeve 301 of upper end rotatory through the screw thread of lower extreme to promote external compression kicking block 302, the sealed granule 306 of rubber of extrusion lower extreme of built-in compression kicking block 303, because the diameter of a plurality of sealed granules 306 of rubber is little, so when being compressed, it is more inseparabler to produce the gap, thereby can be better seal.
As shown in the drawings, the follower shifter 6 includes: an offset connector 601, an offset spherical shell 602, an offset housing 603, an upper ball seat 604, a lower ball seat 605, a seal ring 606, a limit snap ring 607 and an upper oil pipe connector 608; the lower end of the internal limiting inner cylinder 314 is integrally connected with an offset connecting cylinder 601, the lower end of the offset connecting cylinder 601 is integrally connected with an offset spherical shell 602, an upper ball seat 604 and a lower ball seat 605 are slidably sleeved outside the offset spherical shell 602, and a sealing ring 606 is arranged between the offset spherical shell 602 and the lower ball seat 605; an upper oil pipe connecting cylinder 608 is arranged at the lower end of the lower ball seat 605, and a limiting snap ring 607 is clamped between the upper end of the upper oil pipe connecting cylinder 608 and the lower ball seat 605; the upper ball seat 604, the lower ball seat 605 and the upper oil pipe connecting cylinder 608 are sleeved with a deflector shell 603, the upper ball seat 604 is in abutting contact with the bottom surface of the upper end of the deflector shell 603, and the axis of the composite polished rod 1 is not coincident with that of the deflector shell 603.
Through the technical scheme, when the composite polished rod 1 is acted by the upper end device to slide up and down, the composite polished rod 1 can generate transverse offset due to the operation track of the upper end device, so that the upper ball seat 604 and the lower ball seat 605 can be driven to rotate in the shifter shell 603 through the offset spherical shell 602, and the upper end opening of the shifter shell 603 is large, so that the composite polished rod 1 can be offset along with the composite polished rod 1, and the composite polished rod 1 is prevented from being broken due to stress.
Meanwhile, the invention also provides a using method of the composite particle sealing device for the wellhead of the oil pumping unit, which comprises the following specific steps:
s1: firstly, the composite polished rod 1 penetrates through the whole equipment, then the equipment is installed on an oil outlet pipe on the ground through a follow-up deflector 6 at the lower end, then a limit control rotating handle 5 at the upper end is rotated to limit the moving range of the composite polished rod 1 inside, then an upper sealing control rotating handle 4 is rotated to extrude and seal the side surface of the composite polished rod 1, and oil pumped out from the lower end is prevented from leaking out;
s2: the blowout prevention component 2 is arranged at the upper end, so that an oil pipe can be prevented from being sealed when oil at the lower end is sprayed out after the composite polished rod 1 is broken during oil pumping, firstly, when the composite polished rod 1 is broken, the blowout prevention ball 205 in the composite polished rod is pushed after the oil is sprayed out from the lower end, the blowout prevention ball 205 is propped against an outlet at the lower end of the blowout prevention ball base 203, when the oil at the lower end is sprayed out, the sprayed pressure is too high, an oil column can be formed by the blowout prevention ball 205 before reaching the blowout prevention ball base 203, the blowout prevention ball 205 is pushed away, at the moment, the compression springs 209 are pushed towards two sides through the pressure relief sliding sealing plugs 207 at two ends, the oil spraying speed is slowed down for a period of time, the blowout prevention ball 205 is released for blocking the blowout prevention ball base 203, and the blowout prevention effect can be better played;
s3: the lower end of the limiting adjusting sleeve 304 is rotated through threads by rotating the limiting control rotating handle 5, so that the first limiting rubber ring compression cylinder 308 can be pushed to extrude the first limiting rubber ring 309 to transversely deform the first limiting rubber ring, the first limiting rubber ring is inwards abutted against the composite polished rod 1, the transverse moving range of the composite polished rod 1 is reduced, when the threads rotate to the bottom, the second limiting rubber ring compression cylinder 311 is pushed to extrude the second limiting rubber ring 312 through the rotation of the threads at the lower end of the built-in limiting sleeve 310, two-point limitation is formed, and the composite polished rod 1 is better limited;
the rotary handle 4 is controlled by rotating the seal, so that the seal adjusting sleeve 301 at the upper end rotates through the thread at the lower end, the external compression top block 302 and the internal compression top block 303 are pushed to extrude the rubber sealing particles 306 at the lower end, and the gaps generated when the rubber sealing particles 306 are compressed are tighter due to the small diameter of the rubber sealing particles 306, so that better sealing can be realized;
s4: when the composite polished rod 1 is acted by the upper end device, the composite polished rod 1 can slide up and down, the composite polished rod 1 can generate transverse offset due to the operation track of the upper end device, so that the upper ball seat 604 and the lower ball seat 605 can be driven to rotate in the offset device shell 603 through the offset spherical shell 602, and the composite polished rod 1 can be offset along with the composite polished rod 1 due to the large opening at the upper end of the offset device shell 603, so that the composite polished rod 1 is prevented from being broken due to stress.
The working principle is as follows:
the composite polished rod 1 penetrates through the whole equipment, then the equipment is installed on an oil outlet pipe on the ground through the follow-up deflector 6 at the lower end, then the limit control rotating handle 5 at the upper end is rotated to limit the moving range of the composite polished rod 1 inside, then the sealing control rotating handle 4 at the upper part is rotated to extrude and seal the side surface of the composite polished rod 1, and the oil pumped out at the lower end is prevented from leaking out;
the blowout prevention component 2 is arranged at the upper end, so that an oil pipe can be prevented from being sealed when oil at the lower end is sprayed out after the composite polished rod 1 is broken during oil pumping, firstly, when the composite polished rod 1 is broken, the blowout prevention ball 205 in the composite polished rod is pushed after the oil is sprayed out from the lower end, the blowout prevention ball 205 is propped against an outlet at the lower end of the blowout prevention ball base 203, when the oil at the lower end is sprayed out, the sprayed pressure is too high, an oil column can be formed by the blowout prevention ball 205 before reaching the blowout prevention ball base 203, the blowout prevention ball 205 is pushed away, at the moment, the compression springs 209 are pushed towards two sides through the pressure relief sliding sealing plugs 207 at two ends, the oil spraying speed is slowed down for a period of time, the blowout prevention ball 205 is released for blocking the blowout prevention ball base 203, and the blowout prevention effect can be better played;
the lower end of the limiting adjusting sleeve 304 is rotated through threads by rotating the limiting control rotating handle 5, so that the first limiting rubber ring compression cylinder 308 can be pushed to extrude the first limiting rubber ring 309 to transversely deform the first limiting rubber ring, the first limiting rubber ring is inwards abutted against the composite polished rod 1, the transverse moving range of the composite polished rod 1 is reduced, when the threads rotate to the bottom, the second limiting rubber ring compression cylinder 311 is pushed to extrude the second limiting rubber ring 312 through the rotation of the threads at the lower end of the built-in limiting sleeve 310, two-point limitation is formed, and the composite polished rod 1 is better limited;
the rotary handle 4 is controlled by rotating the seal, so that the seal adjusting sleeve 301 at the upper end rotates through the thread at the lower end, the external compression top block 302 and the internal compression top block 303 are pushed to extrude the rubber sealing particles 306 at the lower end, and the gaps generated when the rubber sealing particles 306 are compressed are tighter due to the small diameter of the rubber sealing particles 306, so that better sealing can be realized;
when the composite polished rod 1 is acted by the upper end device, the composite polished rod 1 can slide up and down, the composite polished rod 1 can generate transverse offset due to the operation track of the upper end device, so that the upper ball seat 604 and the lower ball seat 605 can be driven to rotate in the offset device shell 603 through the offset spherical shell 602, and the composite polished rod 1 can be offset along with the composite polished rod 1 due to the large opening at the upper end of the offset device shell 603, so that the composite polished rod 1 is prevented from being broken due to stress.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and that various other modifications and changes can be made on the basis of the above description by those skilled in the art.
Claims (9)
1. Composite particle sealing device of beam-pumping unit well head, including compound polished rod (1), its characterized in that: the composite polished rod (1) is slidably sleeved with a blowout prevention assembly (2) for preventing blowout when broken, the lower end of the blowout prevention assembly (2) is connected with a sealing cylinder piece (3) for sealing a sliding gap on the outer side of the composite polished rod (1), and the lower end of the sealing cylinder piece (3) is provided with a follow-up shifter (6) for moving along with the composite polished rod (1);
the blowout preventer assembly (2) comprises: the blowout preventer comprises a blowout preventer assembly shell (201), a pressure relief piece barrel (202), a blowout preventer ball base (203), a pear-shaped blowout preventer cavity (204), a blowout preventer ball (205), a pressure relief hole (206), a pressure relief sliding sealing plug (207), a guide rod (208) and a compression spring (209);
a blowout prevention assembly shell (201) is slidably sleeved on the outer side of the composite polished rod (1), a blowout prevention ball base (203) is sleeved at the upper end of the blowout prevention assembly shell (201) and located on the outer side of the composite polished rod (1), and pressure relief piece barrels (202) are uniformly arranged at two ends of the outer side of the blowout prevention assembly shell (201) in an integrated mode;
a pear-shaped blowout preventing cavity (204) is formed in the blowout preventing component shell (201), and a blowout preventing ball (205) is movably arranged in the pear-shaped blowout preventing cavity (204);
two pressure release hole (206), two have all been seted up to pressure release part tube (202) outer end all slide in the pressure release part tube (202) and be provided with pressure release slip sealing plug (207), two pressure release slip sealing plug (207) outer end unification is connected with guide bar (208), two the cover is equipped with pressure spring (209) of holding back on guide bar (208).
2. The composite particle sealing device for the wellhead of the oil pumping unit according to claim 1, characterized in that: the pear-shaped anti-spraying cavity (204) is communicated with the two pressure relief piece cylinders (202).
3. The composite particle sealing device for the wellhead of the oil pumping unit according to claim 2, characterized in that: the sealing cartridge (3) comprises: the device comprises a sealing adjusting sleeve (301), an external compression top block (302), an internal compression top block (303), a limiting adjusting sleeve (304), a particle compression gasket (305), rubber sealing particles (306), a particle compression top ring (307), a first limiting rubber ring compression cylinder (308), a first limiting rubber ring (309), an internal limiting sleeve (310), a second limiting rubber ring compression cylinder (311), a second limiting rubber ring (312), a second limiting rubber ring top ring (313), an internal limiting inner cylinder (314), a sealing handle mounting seat (315) and a limiting handle mounting seat (316);
the lower end of the blowout prevention assembly shell (201) is integrally connected with a sealing adjusting sleeve (301), a built-in compression ejector block (303) is arranged in the sealing adjusting sleeve (301) and located on the outer side of the composite polished rod (1), and an external compression ejector block (302) is sleeved outside the built-in compression ejector block (303);
two particle compression gaskets (305) are arranged at the lower end of the built-in compression top block (303), a plurality of rubber sealing particles (306) are arranged between the two particle compression gaskets (305), a particle compression top ring (307) is arranged at the lower end of the particle compression gasket (305) at the lower end, and a limiting adjusting sleeve (304) is sleeved outside the particle compression gasket (305), the rubber sealing particles (306) and the particle compression top ring (307);
a built-in limiting sleeve (310) is arranged on the inner side of the lower end of the limiting adjusting sleeve (304), a first limiting rubber ring compression cylinder (308) is slidably sleeved at the upper end of the inner side of the built-in limiting sleeve (310) and positioned on the outer side of the composite polished rod (1), and a plurality of first limiting rubber rings (309) are arranged at the lower end of the first limiting rubber ring compression cylinder (308);
a built-in limiting inner cylinder (314) is arranged on the inner side of the lower end of the limiting adjusting sleeve (304), a second limiting rubber ring compression cylinder (311) is slidably sleeved at the upper end of the inner side of the built-in limiting inner cylinder (314) and positioned on the outer side of the composite polished rod (1), a plurality of second limiting rubber rings (312) are arranged at the lower end of the second limiting rubber ring compression cylinder (311), and a second limiting rubber ring top ring (313) is arranged at the lower end of each second limiting rubber ring (312);
sealed adjusting sleeve (301) outside both ends homogeneous body is provided with sealed handle mount pad (315), spacing adjusting sleeve (304) outside both ends homogeneous body is provided with spacing handle mount pad (316).
4. The composite particle sealing device for the wellhead of the oil pumping unit according to claim 3, characterized in that: the sealing adjusting sleeve (301) is in rotating fit with the limiting adjusting sleeve (304) through threads;
the limit adjusting sleeve (304) is in rotational fit with the built-in limit sleeve (310) through threads;
the built-in limiting sleeve (310) is in rotating fit with the built-in limiting inner cylinder (314) through threads.
5. The composite particle sealing device for the wellhead of the pumping unit according to claim 4, characterized in that: two install two sealed control rotation handle (4) in sealed handle mount pad (315) respectively, two install two spacing control rotation handle (5) in spacing handle mount pad (316) respectively.
6. The composite particle sealing device for the wellhead of the oil pumping unit according to claim 5, characterized in that: the follower deviator (6) comprises: the device comprises an offset connecting cylinder (601), an offset spherical shell (602), an offset device shell (603), an upper ball seat (604), a lower ball seat (605), a sealing ring (606), a limiting snap ring (607) and an upper oil pipe connecting cylinder (608);
the lower end of the internal limiting inner cylinder (314) is integrally connected with an offset connecting cylinder (601), the lower end of the offset connecting cylinder (601) is integrally connected with an offset spherical shell (602), an upper ball seat (604) and a lower ball seat (605) are sleeved outside the offset spherical shell (602) in a sliding manner, and sealing rings (606) are arranged on the offset spherical shell (602) and the lower ball seat (605);
an upper oil pipe connecting cylinder (608) is arranged at the lower end of the lower ball seat (605), and a limiting snap ring (607) is clamped between the upper end of the upper oil pipe connecting cylinder (608) and the lower ball seat (605);
and a deflector shell (603) is sleeved outside the upper ball seat (604), the lower ball seat (605) and the upper oil pipe connecting cylinder (608).
7. The composite particle sealing device for the wellhead of the oil pumping unit according to claim 6, characterized in that: the upper ball seat (604) is in abutting contact with the bottom surface of the upper end of the deflector shell (603).
8. The composite particle sealing device for the wellhead of the oil pumping unit according to claim 7, characterized in that: the composite polish rod (1) is not coincident with the axis of the shifter housing (603).
9. The use method of the composite particle sealing device for the wellhead of the oil pumping unit according to claim 8 is characterized in that: the method comprises the following specific steps:
s1: firstly, a composite polished rod (1) penetrates through the whole equipment, then the equipment is installed on an oil outlet pipe on the ground through a follow-up shifter (6) at the lower end, then a limit control rotating handle (5) at the upper end is rotated to limit the moving range of the composite polished rod (1) inside, then a sealing control rotating handle (4) at the upper part is rotated to extrude and seal the side surface of the composite polished rod (1), and oil extracted from the lower end is prevented from leaking;
s2: the blowout prevention component (2) is arranged at the upper end, so that an oil pipe can be sealed when oil at the lower end is sprayed out after the composite polished rod (1) is broken during oil pumping, firstly, when the composite polished rod (1) is broken, the blowout prevention ball (205) in the composite polished rod is pushed after the oil is sprayed out from the lower end, the blowout prevention ball (205) is propped against an outlet at the lower end of the blowout prevention ball base (203), when the oil at the lower end is sprayed out, the sprayed pressure is too high, an oil column can be formed before the blowout prevention ball (205) reaches the blowout prevention ball base (203), the blowout prevention ball (205) is pushed open, and then the pressure-relieving springs (209) are pushed towards two sides through the pressure-relieving sliding sealing plugs (207) at two ends, the oil spraying speed is slowed down for a period of time, the blowout prevention ball (205) is emptied to block the blowout prevention ball base (203), and the blowout prevention effect can be better achieved;
s3: the lower end of the limit adjusting sleeve (304) is rotated through threads by rotating the limit control rotating handle (5), so that a first limit rubber ring compression cylinder (308) can be pushed to extrude a first limit rubber ring (309) to transversely deform the first limit rubber ring, the first limit rubber ring is inwards abutted against the composite polished rod (1), the transverse moving range of the composite polished rod is reduced, when the threads rotate to the bottom, a second limit rubber ring compression cylinder (311) is pushed to extrude a second limit rubber ring (312) through the threads at the lower end of the built-in limit sleeve (310), two-point limitation is formed, and the composite polished rod (1) is better limited;
the rotary handle (4) is controlled by rotating the seal, so that the seal adjusting sleeve (301) at the upper end rotates through the thread at the lower end, the external compression top block (302) and the internal compression top block (303) are pushed to extrude the rubber sealing particles (306) at the lower end, and because the diameters of a plurality of rubber sealing particles (306) are small, when the rubber sealing particles are compressed, gaps are generated more tightly, so that better sealing can be realized;
s4: when compound polished rod (1) is acted by the equipment of upper end, when carrying out the operation of sliding from top to bottom, because the operation orbit of upper end equipment, can make compound polished rod (1) produce lateral deviation to can drive ball seat (604), lower ball seat (605) at deviator shell (603) internal rotation through skew spherical shell (602), because deviator shell (603) upper end opening is big, thereby can follow compound polished rod (1) and carry out the skew, prevent that compound polished rod (1) atress from breaking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210877312.5A CN114934755A (en) | 2022-07-25 | 2022-07-25 | Composite particle sealing device for oil pumping unit wellhead and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210877312.5A CN114934755A (en) | 2022-07-25 | 2022-07-25 | Composite particle sealing device for oil pumping unit wellhead and use method thereof |
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| CN114934755A true CN114934755A (en) | 2022-08-23 |
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| CN202210877312.5A Pending CN114934755A (en) | 2022-07-25 | 2022-07-25 | Composite particle sealing device for oil pumping unit wellhead and use method thereof |
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Application publication date: 20220823 |
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