CN114016946A - CO (carbon monoxide)2Wellhead device for oil displacement - Google Patents
CO (carbon monoxide)2Wellhead device for oil displacement Download PDFInfo
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- CN114016946A CN114016946A CN202111407819.6A CN202111407819A CN114016946A CN 114016946 A CN114016946 A CN 114016946A CN 202111407819 A CN202111407819 A CN 202111407819A CN 114016946 A CN114016946 A CN 114016946A
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- 238000006073 displacement reaction Methods 0.000 title claims description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 title description 3
- 238000007789 sealing Methods 0.000 claims abstract description 49
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 230000002265 prevention Effects 0.000 claims description 19
- 238000005259 measurement Methods 0.000 claims description 16
- 238000009434 installation Methods 0.000 claims description 14
- 238000003825 pressing Methods 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 6
- 239000000725 suspension Substances 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000003912 environmental pollution Methods 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 107
- 238000012856 packing Methods 0.000 description 44
- 210000004907 gland Anatomy 0.000 description 26
- 239000004744 fabric Substances 0.000 description 24
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 14
- 238000005086 pumping Methods 0.000 description 13
- 229910002092 carbon dioxide Inorganic materials 0.000 description 10
- 239000003129 oil well Substances 0.000 description 9
- 239000004519 grease Substances 0.000 description 8
- 239000001569 carbon dioxide Substances 0.000 description 7
- 238000000605 extraction Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000033001 locomotion Effects 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 210000002445 nipple Anatomy 0.000 description 5
- 238000005070 sampling Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010808 liquid waste Substances 0.000 description 2
- 241000191291 Abies alba Species 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000009919 sequestration Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- 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
-
- 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
- E21B34/02—Valve arrangements for boreholes or wells in well heads
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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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)
- Geophysics (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
Abstract
The invention discloses CO2A wellhead assembly for producing oil, comprising: the wellhead four-way joint comprises a wellhead four-way joint, an annulus measuring component, an air release valve, an oil transportation main pipe, an oil transportation sub-pipe, a measuring pipe, a blowout preventer and a seal assembly; the wellhead four-way is connected with a casing pipe, an annular space measuring component, an emptying valve and a connecting pipe assembly of a wellhead; the connecting pipe assembly is connected with the blowout preventer; the blowout preventer is also connected with the sealing assembly; the oil transportation main pipe is connected with the connecting pipe assembly, and a stop valve, an oil transportation main gate valve and a check valve are arranged on the oil transportation main pipe; the stop valve is connected with a first pressure gauge; of main oil-conveying pipe with one end of measuring pipe and sub-oil-conveying pipeOne end is connected; the atmospheric valve is connected with the measuring pipe. The oil transportation working condition can be monitored through the first pressure gauge on the oil transportation main pipe. Simultaneously, can open and close the oil transportation main pipe through oil transportation main gate valve. The check valve can avoid the liquid production waste and the environmental pollution caused by the backflow after the sucker rod is broken.
Description
Technical Field
The invention belongs to the technical field of oilfield development equipment, and particularly relates to CO2A wellhead device for oil displacement.
Background
At present, shallow oil production wells almost all adopt simple well heads and have simple structures. At the site of oil recovery, a plurality of simple oil wells (called satellite wells) are usually opened to perform oil recovery operations. Carbon dioxide flooding enhanced recovery and sequestration technology is increasingly gaining attention as an effective method for greenhouse gas resource utilization, and various oil fields successively develop research and application of the technology. Injecting carbon dioxide into a plurality of satellite wells needing oil displacement in the same layer through a special carbon dioxide injection well, injecting the carbon dioxide into the oil reservoir through the carbon dioxide injection well, and maintaining or recovering the carbon dioxide stored in the oil reservoirReservoir pressure and then production through satellite wells. In the process of injecting carbon dioxide to realize oil displacement, although part of CO is injected2Can be stored in the reservoir, but when the injected gas reaches a certain level, CO is produced in the gas2The content will gradually increase.
In the prior art, the oil extraction equipment for oil extraction of a shallow oil layer is simple, valves are not used for oil extraction and sleeve annulus output (associated gas), potential safety hazards exist, well control cannot be operated and controlled once an accident happens in the process of oil extraction, and the working condition of on-site oil extraction cannot be monitored in real time. Meanwhile, the phenomenon of rod breakage can occur when the sucker rod works, after the sucker rod breaks, the well head can stop pumping oil, at the moment, the pressure close to the upper part of the well head can be reduced, certain pressure is still arranged on the oil pipeline, and the produced liquid on the oil pipeline flows back to the oil pumping device above the well head, so that the waste of the produced liquid and the environmental pollution are caused.
Disclosure of Invention
In order to solve the above problems in the prior art, the present invention provides a CO2A wellhead device for oil displacement. The technical problem to be solved by the invention is realized by the following technical scheme:
CO (carbon monoxide)2A wellhead assembly for producing oil, comprising: the wellhead four-way joint comprises a wellhead four-way joint, an annulus measuring component, an air release valve, an oil transportation main pipe, an oil transportation sub-pipe, a measuring pipe, a blowout preventer and a seal assembly;
the first port of the wellhead four-way is connected with a casing of a wellhead, the second port of the wellhead four-way is connected with the annular space measuring assembly, and the third port of the wellhead four-way is connected with the emptying valve; the fourth port of the wellhead four-way is connected with the oil pipe through a connecting pipe assembly; the connecting pipe assembly is connected with the blowout preventer;
the blowout preventer is also connected with the seal assembly;
the oil transportation main pipe is connected with the connecting pipe assembly, and a stop valve, an oil transportation main gate valve and a check valve are sequentially arranged on the oil transportation main pipe along the liquid production conveying direction; the stop valve is connected with a first pressure gauge;
the oil transportation main pipe is connected with one end of the measuring pipe and one end of the oil transportation sub-pipe;
the measuring pipe is positioned between the check valve and the oil delivery sub-pipe;
the emptying valve is connected with the measuring pipe.
In one embodiment of the invention, the first port of the wellhead four-way is connected with a casing of a wellhead through a casing flange and a casing double male short section.
In one embodiment of the invention, the connecting pipe assembly comprises a conversion flange and a mounting pipe;
the conversion flange is arranged on a fourth port of the wellhead four-way and is connected with one end of the installation pipe;
one end of the mounting pipe is also communicated with the oil pipe through an oil pipe suspension assembly, and the other end of the mounting pipe is connected with the blowout preventer;
one end of the oil delivery main pipe is connected with the pipe body of the installation pipe.
In one embodiment of the invention, the blow valve is connected to the measuring tube via a back-pressure check valve.
In one embodiment of the invention, the annulus measurement assembly comprises: an annular gate valve and a second pressure gauge;
and a second port of the wellhead four-way is connected with the annular gate valve, the annular gate valve is connected with the second pressure gauge, and the annular gate valve is positioned between the second pressure gauge and the wellhead four-way.
In one embodiment of the invention, the measuring tube and the oil transportation sub-tube are arranged in sequence along the conveying direction of the produced liquid;
a measuring gate valve is arranged on the measuring pipe; and an oil transportation sub gate valve is arranged on the oil transportation sub pipe.
In one embodiment of the present invention, the blowout preventer comprises: the anti-blowout device comprises a ball seat, an eccentric adjusting piece, a pressing cap and an anti-blowout box assembly;
the lower end of the ball seat is connected with the other end of the mounting pipe;
the outer wall of the lower part of the eccentric adjusting piece is a spherical surface and is in rotating contact with and sealed with the upper part of the ball seat, the eccentric adjusting piece is provided with an installation through hole, the installation through hole is sleeved on the sucker rod, and the center of the installation through hole is positioned on the eccentric position of the ball seat;
the pressing cap is pressed on the lower part of the eccentric adjusting piece and is connected with the ball seat;
the blowout prevention box assembly is sleeved on the sucker rod and is connected with the upper part of the eccentric adjusting piece;
the sealing assembly is sleeved on the sucker rod and is connected with the blowout prevention box assembly;
and the shaft axis of the blowout prevention box assembly and the shaft axis of the sealing assembly are coincided with the shaft axis of the mounting through hole.
The invention has the beneficial effects that:
according to the invention, the pressure change in the oil transportation process can be detected through the first pressure gauge on the oil transportation main pipe, so that the oil transportation working condition can be monitored, and the stop valve can be cut off in time to play a role in protecting and replacing the first pressure gauge. Simultaneously, can open and close the oil transportation main pipe through oil transportation main gate valve. Can carry out the unloading operation through atmospheric valve, can measure liquid production volume through surveying buret. If emergency happens, the main oil delivery gate valve can be operated to close the main oil delivery pipe, and the blowout preventer and the sealing assembly are further arranged, so that the safety is improved.
The invention also enables the produced liquid to flow from the well mouth to the produced liquid output direction in a single direction through the check valve, but not to flow back to the well mouth direction in the oil transportation main pipe, thereby avoiding the produced liquid waste and environmental pollution caused by the back flow after the sucker rod is broken.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Drawings
FIG. 1 shows a CO according to an embodiment of the present invention2A schematic of the structure of a wellhead device for oil recovery;
FIG. 2 is a schematic structural view of a blowout preventer and seal assembly according to an embodiment of the present invention.
Description of reference numerals:
100-a blowout preventer; 110-a ball seat; 120-an eccentric adjustment; 121-mounting through holes; 130-pressing a cap; 140-blowout preventer cartridge assembly; 141-blowout preventer cartridge; 142-a seal seat; 143-a first tapered through hole; 150-a seal assembly; 151-a first conical spiral clamping cloth packing; 152-a first packing gland; 153-a mount; 1531-a mounting cavity; 1532-second tapered through hole; 154-second conical spiral clamp cloth packing; 155-a second packing gland; 156-a spring; 157-sealing gland; 160-a first locating wear bushing; 161-first axial collar; 170-a second locating wear bushing; 171-a second axial collar; 180-grease injection valve; 190-grease nipple; 200-wellhead cross; 201-a first port; 202-a second port; 203-third port; 204-a fourth port; 210-an annulus measurement assembly; 211-annulus gate valve; 212-a second pressure gauge; 220-a blow-down valve; 221-back pressure check valve; 230-oil transportation main pipe; 231-oil transportation pipe; 232-measuring tube; 233-stop valve; 234-main oil transfer gate valve; 235-a check valve; 236-a first pressure gauge; 237-measuring gate valve; 238-oil transportation sub gate valve; 240-connecting tube assembly; 241-a transition flange; 242-mounting the tube; 243-oil pipe suspension assembly; 400-casing flange; 410-double male nipple of casing; 500-sampling valve.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto.
Example one
Please refer to fig. 1, a CO2A wellhead assembly for producing oil, comprising: a wellhead four-way 200, an annulus measurement component 210, a blow-down valve 220, a main oil pipe 230, an oil sub-oil pipe 231, a measurement pipe 232, the blowout preventer 100 and a seal assembly 150;
the first port 201 of the wellhead four-way 200 is connected with a casing of a wellhead, the second port 202 of the wellhead four-way 200 is connected with an annulus measuring assembly 210, and the third port 203 of the wellhead four-way 200 is connected with an emptying valve 220; the fourth port 204 of the wellhead four-way 200 is connected with the oil pipe through a connecting pipe assembly 240; the connector assembly 240 is coupled to the blowout preventer 100. Blowout preventer 100 is also coupled to a seal assembly 150. In this embodiment, sucker rods extend downhole from seal assembly 150 and blowout preventer 100 through to connector assembly 240 for production. The produced oil is transported through the main oil transportation pipe 230.
The oil transportation main pipe 230 is connected with a connecting pipe assembly 240, and a stop valve 233, an oil transportation main gate valve 234 and a check valve 235 are sequentially arranged on the oil transportation main pipe 230 along the production liquid conveying direction. A first pressure gauge 236 is connected to the shut-off valve 233. The first pressure gauge 236 may detect the magnitude of the oil transportation pressure in the oil transportation main pipe 230, so as to monitor the oil transportation condition. The cutoff valve 233 can be cut off in time to protect and replace the first pressure gauge 236. The main oil delivery pipe 230 is connected to one end of the measurement pipe 232 and one end of the oil delivery sub-pipe 231. The measurement pipe 232 is located between the check valve 235 and the oil delivery pipe 231. The air release valve 220 is connected to the measurement pipe 232. When the production needs to be detected, the oil delivery pipe 231 is closed, the measuring pipe 232 is opened, and when the oil delivery is needed, the oil delivery pipe 231 is opened, and the measuring pipe 232 is closed.
In this embodiment, the main oil delivery pipe 230 can be opened and closed by the main oil delivery gate valve 234. Emptying can be performed by means of the emptying valve 220, and the amount of liquid produced can be measured by means of the measuring tube 232. During measurement, the oil delivery pipe 231 is closed, the produced liquid enters the measuring pipe 232, and then the yield is measured through a measuring instrument connected with the measuring pipe 232. If an emergency occurs, the main oil delivery gate valve 234 can be operated to close the main oil delivery pipe 230, and the blowout preventer 100 and the seal assembly 150 are further arranged, so that the safety is improved.
At the same time, the check valve 235 allows one-way transport of production fluids in the main oil line 230. It should be noted that, the sucker rod may break during operation, and after the sucker rod breaks, the well head may stop pumping oil, and at this moment, the pressure near the top of the well head may become zero, and the oil pipeline still has certain pressure, then may take place to flow back to the pumping unit above the well head the production liquid on the oil pipeline, from the outflow of sucker rod hole cause the production liquid waste and environmental pollution. The check valve 235 of this embodiment prevents the produced fluid from flowing back to the wellhead direction from the main oil pipe 230, so as to prevent the produced fluid from entering the blowout preventer 100 due to backflow after the sucker rod is broken, and further overflowing to the external environment to cause waste and environmental pollution. Wherein, atmospheric valve 220 is connected with survey buret 232, when carrying out the unloading operation, during liquid or the gaseous survey buret 232 that can get into of production, and then get into the follow-up measurement or collecting device that measures, further avoid the liquid or the gaseous pollution that causes the environment in getting into air and the external environment of unloading operation.
Further, as shown in fig. 1, the first port 201 of the wellhead four-way 200 is connected with the casing of the wellhead through a casing flange 400 and a casing duplex sub 410. One end of the double male short joint 410 of the casing is fixedly connected and sealed with the casing, the other end is fixedly connected and sealed with the casing flange 400, and the casing flange 400 is fixedly connected and sealed with the connecting pipe assembly 240. In the embodiment, the elements are hermetically connected according to the requirements and standards of oil production equipment.
Further, as shown in fig. 1, the blow-down valve 220, the annulus gate valve 211, the main oil delivery gate valve 234, the measurement gate valve 237, and the sub oil delivery gate valve 238 are wedge gate valves or plate gate valves in this embodiment; check valve 235 is a poppet check valve or a swing check valve in this embodiment and back pressure check valve 221 is a poppet check valve or a swing check valve in this embodiment.
Further, as shown in fig. 1, the connection pipe assembly 240 includes a conversion flange 241 and a mounting pipe 242. The conversion flange 241 is arranged on the fourth port 204 of the four-way wellhead 200, and the conversion flange 241 is connected with one end of the installation pipe 242. One end of mounting pipe 242 is also in communication with tubing via tubing hanger assembly 243, and the other end of mounting pipe 242 is connected to blowout preventer 100. One end of the main oil pipe 230 is connected to the body of the mounting pipe 242. In this embodiment, tubing hanger assembly 243 is disposed within mounting tube 242 and extends into transition flange 241 and wellhead spool 200 for connection to tubing. The seal assembly 150 is located above the blowout preventer 100. The sucker rods pass through seal assembly 150, blowout preventer 100, tubing hanger assembly 243 in mounting tube 242 and into the tubing.
Further, as shown in FIG. 1, the blow valve 220 is connected to the measurement pipe 232 through a back pressure check valve 221. One end of the back pressure check valve 221 is connected to the air release valve 220 and the other end is connected to the measurement pipe 232. In this embodiment, when the pressure in the casing reaches a certain pressure value, the back pressure check valve 221 may be automatically opened for automatic emptying, and the degree of automation is high. The release valve 220 is a manual gate valve, and the back-pressure check valve 221 can be protected or replaced when the release valve 220 is closed. The cracking pressure of the back-pressure check valve 221 may be set and adjusted as desired.
Further, as shown in FIG. 1, the annulus measurement assembly 210 includes: an annulus gate valve 211 and a second pressure gauge 212. The second port 202 of the wellhead cross-way 200 is connected with an annulus gate valve 211, the annulus gate valve 211 is connected with a second pressure gauge 212, and the annulus gate valve 211 is positioned between the second pressure gauge 212 and the wellhead cross-way 200. In this embodiment, one end of the annular gate valve 211 is connected to the second port 202 of the wellhead cross 200, and the other end is connected to the second pressure gauge 212. The second pressure gauge 212 may measure the amount of the annular pressure so as to monitor the amount of the annular pressure, and the annular gate valve 211 may be closed to protect the second pressure gauge 212 in case of emergency.
Further, as shown in fig. 1, a measuring pipe 232 and an oil delivery pipe 231 are sequentially disposed in the delivery direction of the produced liquid. A measuring gate valve 237 is arranged on the measuring pipe 232; the oil delivery pipe 231 is provided with an oil delivery sub gate valve 238. When the output needs to be detected, the oil delivery sub gate valve 238 is closed, the measurement gate valve 237 is opened, and when the oil delivery is needed, the oil delivery sub gate valve 238 is opened, and the measurement gate valve 237 is closed.
In a feasible implementation manner, a sampling valve 500 is hermetically connected to the end of the main oil pipe 230, and a crude oil sample can be collected according to the requirement through the sampling valve 500. The sampling valve 500 is a sampling cut-off valve 233.
Example two
As shown in fig. 1 and 2, the present embodiment further defines, on the basis of the first embodiment, a blowout preventer 100 including: ball seat 110, over-center adjustment 120, press cap 130, and blowout preventer assembly 140. The lower end of the ball seat 110 is connected to the other end (upper end) of the mounting tube 242. During oil production, the sucker rod passes through the sealing assembly 150, the blowout preventer assembly 140, the eccentric adjusting member 120 and the ball seat 110 in sequence to enter an oil well for oil production operation.
The outer wall of the lower portion of the eccentricity adjustment 120 is spherical and is in rotational contact with and seals the upper portion of the ball seat 110. The eccentricity adjustment 120 forms a seal with the ball seat 110 through a seal. The eccentric adjusting member 120 is provided with a mounting through hole 121, the mounting through hole 121 is sleeved on the sucker rod, and the center of the mounting through hole 121 is located at the eccentric position of the ball seat 110. In this embodiment, the ball seat 110 has a receiving through hole, the lower end of the receiving through hole is connected to the mounting pipe, the hole wall of the upper portion of the receiving through hole is an arc surface attached to the outer wall of the eccentric adjusting member 120, and the eccentric adjusting member 120 can perform spherical rotation motion at the position of the receiving through hole under the action of the sucker rod. The pressing cap 130 is pressed on the lower portion of the eccentricity adjusting member 120, the pressing cap 130 is coupled to the ball seat 110, and the pressing cap 130 is used to limit the eccentricity adjusting member 120. Wherein the pressing cap 130 is threadedly coupled with the ball seat 110.
The blowout prevention box assembly 140 is sleeved on the sucker rod, the blowout prevention box assembly 140 is connected with the upper part of the eccentric adjusting part 120, the sealing assembly 150 is sleeved on the sucker rod, the sealing assembly 150 is connected with the blowout prevention box assembly 140, and the sealing assembly 150 is used for sealing the sucker rod on the blowout prevention box assembly 140. The shaft axis of the blowout preventer assembly 140 and the shaft axis of the seal assembly 150 are both coincident with the shaft axis of the mounting through hole 121. The center axis of the ball seat 110 coincides with the center axis of the oil well, and the center axis of the installation through hole 121 of the eccentricity adjustment member 120 is located at an eccentric position of the ball seat 110, so that the center axis of the blowout preventer assembly 140 and the center axis of the seal assembly 150 are located at the eccentric position of the ball seat 110.
In this embodiment, during oil extraction, the sucker rod is inserted into the sealing assembly 150, the blowout preventer assembly 140, the eccentric adjusting member 120 and the ball seat 110 to extract oil from the oil well, and under the driving of the sucker rod, the eccentric adjusting member 120 can float (rotate at a certain angle and direction) on the ball seat 110 along with the sucker rod, so that the blowout preventer assembly 140 and the sealing assembly 150 can float along with the eccentric adjusting member 120, the sucker rod will not shift (deviate) relative to the center axes of the blowout preventer assembly 140 and the sealing assembly 150, the center of the sucker rod will not deviate from the center axes of the sealing assembly 150 and the blowout preventer assembly 140, and the abrasion between the sucker rod and the blowout preventer assembly 140 and the sealing assembly 150 is small, thereby reducing the probability of the phenomenon that the sucker rod generates the eccentric abrasion and sealing failure on the blowout preventer assembly 140 and the sealing assembly 150, and prolonging the service life of the blowout preventer assembly 140 and the sealing assembly 150, not only the cost is reduced, but also the risk of accidents is reduced, and the safety is improved.
In the prior art, due to various errors of oil pumping unit installation and the like, the center of the sucker rod can deviate from the center shaft of the blowout prevention box, the sealing assembly and the oil well (the center shaft of the blowout prevention box is superposed with the center shaft of the oil well), and the center shaft of the blowout prevention box is superposed with the center shaft of the oil well and is fixed, so that the sucker rod can generate displacement (deviation) relative to the center shafts of the blowout prevention box and the sealing assembly in the movement process of the sucker rod in the oil extraction operation process, the sucker rod can generate abrasion between the sucker rod and the blowout prevention box and the sealing assembly, and the phenomenon that the sucker rod generates partial abrasion and sealing failure on the blowout prevention box and the sealing assembly can occur. In the embodiment, the blowout prevention box assembly 140 and the sealing assembly 150 float along with the eccentric adjusting member 120 under the driving of the motion of the sucker rod, and the central axes of the blowout prevention box assembly 140 and the sealing assembly 150 do not shift (deviate) relative to the sucker rod basically, so that the probability of the phenomenon that the blowout prevention box assembly 140 and the sealing assembly 150 are worn out and sealed and failed due to the eccentric wear of the sucker rod is reduced, the service lives of the blowout prevention box assembly 140 and the sealing assembly 150 are prolonged, the efficiency of accidents is reduced, and the safety is improved.
Further, as shown in fig. 2, the blowout preventer cartridge assembly 140 includes: a blowout preventer 141 and a seal mount 142. The seal assembly 150 includes: the packing gland comprises a first conical spiral clamp cloth packing 151, a first packing gland 152, a mounting seat 153, a second conical spiral clamp cloth packing 154, a second packing gland 155, a spring 156 and a sealing gland 157. The lower end of the blowout preventer 141 is connected to the upper portion of the eccentricity adjusting member 120, and the upper end of the blowout preventer 141 is connected to the seal holder 142. The sealing seat 142 has a first tapered through hole 143 formed therein along the axial direction. The axial direction of the seal holder 142 is parallel to the axial direction of the oil well. The first conical spiral clamp cloth packing 151 is disposed in the first conical through hole 143. The outer diameter of the first conical spiral clamp cloth packing 151 gradually decreases from top to bottom, and the inner diameter of the first conical through hole 143 matches with the outer diameter of the first conical spiral clamp cloth packing 151. The first packing gland 152 is pressed on the upper end of the first conical spiral clamp cloth packing 151, and presses the first conical spiral clamp cloth packing 151 into the first conical through hole 143.
The lower end of the mounting seat 153 is provided with an axial mounting cavity 1531, and the upper end of the mounting seat 153 is provided with an axial second tapered through hole 1532. The axial direction of the mount 153 is parallel to the axial direction of the oil well. The lower end of the first packing gland 152 abuts against the upper end of the first conical spiral clamp cloth packing 151, and the upper end of the first packing gland 152 abuts against the radial inner wall of the upper end of the mounting cavity 1531. The mounting cavity 1531 communicates with the second tapered through hole 1532. The sealing seat 142 is inserted into the mounting cavity 1531 and is sealed together. The second conical spiral clamp cloth packing 154 is disposed within the second conical through hole 1532. The outer diameter of the second conical spiral clamp cloth packing 154 is gradually reduced from top to bottom, and the inner diameter of the second conical through hole 1532 is matched with the outer diameter of the second conical spiral clamp cloth packing 154. The second packing gland 155 is pressed on the upper end of the second tapered spiral clamp cloth packing 154 to press the second tapered spiral clamp cloth packing 154 into the second tapered through hole 1532. The sealing cover 157 is provided to cover the upper end of the mounting seat 153 and seals the mounting seat 153. The lower end of the second packing gland 155 abuts against the upper end of the second conical spiral clamp cloth packing 154, and the upper end abuts against the radial inner wall of the gland 157. A spring 156 is disposed within the gland 157, with the two ends of the spring 156 held between the second gland 155 and the gland 157.
In this embodiment, the first conical spiral wired packing 151 and the second conical spiral wired packing 154 are sealing packing made of a conical winding type wired highly saturated hydrogenated nitrile rubber material, and the sucker rod passes through the centers of the first conical spiral wired packing 151, the first packing gland 152, the second conical spiral wired packing 154, and the second packing gland 155. In the oil recovery process, if the central inner side of the first conical spiral clamp cloth packing 151 or the second conical spiral clamp cloth packing 154 is abraded by the contact part of the sucker rod, the part with the larger outer diameter of the upper end can move to the lower side, and the conical spiral clamp cloth packing can shrink to the center because the inner diameter of the conical through hole of the lower side is smaller, so that the sucker rod can be attached again, and the sucker rod is sealed again. Therefore, can form comparatively lasting sealed to the sucker rod, prolong sealed assembly 150's life, promote sealed assembly 150's sealed effect. Wherein, when the hole (rubber seal) of second toper spiral clamp cloth packing 154 produced wearing and tearing because of moving about with the sucker rod surface, when leading to taking place the sucker rod oil leak, under the effect of spring force, pushed down second toper spiral clamp cloth packing 154 for second toper spiral clamp cloth packing 154 produces the seepage that little deformation removal shrink automatic compensation wearing and tearing produced along axial and circumferencial direction.
Wherein, the longitudinal section of the tapered through hole is trapezoidal.
Further, as shown in fig. 2, a first positioning wear-resistant bushing 160 is fixedly disposed in the upper end of the mounting through hole 121. In this embodiment, the sucker rod may pass through the center of the first positioning wear-resistant bushing 160, and the sucker rod is installed in the installation through hole 121 through the first positioning wear-resistant bushing 160. The mounting through hole 121 can be of a stepped hole structure, the diameter of a part of the hole close to the upper end is large, the lower end of the first positioning wear-resistant bushing 160 abuts against the step of the mounting through hole 121, the upper end of the first positioning wear-resistant bushing 160 can also be provided with a first axial retainer ring 161, and the first axial retainer ring 161 is clamped into the inner wall of the mounting through hole 121 and used for axially limiting the first positioning wear-resistant bushing 160.
Further, as shown in fig. 2, a second positioning wear-resistant bushing 170 is disposed in the mounting seat 153. Second alignment wear sleeve 170 is positioned between mounting cavity 1531 and second tapered through hole 1532. In this embodiment, the sucker rod may pass through the center of the second positioning wear-resistant bushing 170, and the sucker rod is installed in the mounting seat 153 through the second positioning wear-resistant bushing 170. The lower end of the second positioning wear-resistant bushing 170 abuts against a step of a hole at a communication position of the mounting cavity 1531 and the second tapered through hole 1532, a second axial retaining ring 171 can be further arranged at the upper end of the second positioning wear-resistant bushing 170, and the second axial retaining ring 171 is clamped into the inner wall of the hole at the communication position and used for axially limiting the second positioning wear-resistant bushing 170. The sucker rod is in clearance fit with the first positioning wear-resistant bushing 160, the sucker rod is in clearance fit with the second positioning wear-resistant bushing 170, the first positioning wear-resistant bushing 160 and the second positioning wear-resistant bushing 170 can enable the sucker rod to float along with the eccentric adjusting piece 120, the blowout preventer box assembly 140 and the sealing assembly 150, the sucker rod can axially move in the first positioning wear-resistant bushing 160 and the second positioning wear-resistant bushing 170 to pump oil, and meanwhile abrasion caused by the movement of the sucker rod relative to the eccentric adjusting piece 120 and the sealing assembly 150 during work is prevented.
In one possible implementation, a grease injection valve 180 is disposed on the mounting seat 153, and the grease injection valve 180 is disposed at the mounting cavity 1531 and on one side of the first packing gland 152. The sealing gland 157 is provided with a grease nipple 190, and the grease nipple 190 is close to the upper end of the mounting seat 153. The grease filling valve 180 and the grease nipple 190 are used for filling lubricating oil. Wherein, a handle for rotating the pressing cap 130 is arranged on the pressing cap 130. The gland 157 is threadedly coupled to the mounting seat 153. The mounting seat 153 and the sealing seat 142 are screwed and form a seal by a sealing ring. The components of the wellhead sucker rod sealing device form sealing at the joints according to the sealing requirements.
The installation and adjustment process of the wellhead sucker rod sealing device of the invention is as follows:
1. the sucker rod is separated from the pumping unit according to the relevant operation specification requirement, then the sealing assembly 150 is detached, and the surface of the sucker rod is coated with lubricating oil at the corresponding position.
2. The blowout preventer assembly 140 is opened (the left and right switch handles of the blowout preventer 141 are rotated), and the blowout preventer assembly 140 and the eccentric ball assembly (the ball seat 110, the eccentric adjuster 120 and the press cap 130) are threaded through the sucker rod and tightened with the main drift diameter oil pipe thread according to relevant regulations (the first positioning wear-resistant bushing 160 in the eccentric adjuster 120 cannot be damaged by cutting when the sucker rod is threaded).
3. The first conical spiral clamping cloth packing 151 and the first packing gland 152 are sequentially installed in the sealing seat 142 at the upper end of the blowout preventer assembly 140, the installation seat 153 is installed and pressed tightly (the sucker rod can not damage the second positioning wear-resistant bush 170 in the installation seat 153 when being inserted), and a small arm torque of a special hook wrench for the installation seat 153 is preliminarily screwed tightly.
4. The second conical spiral clamp cloth packing 154, the second packing gland 155 and the spring 156 are sequentially installed into the second conical through hole 1532, and then the sealing gland 157 is installed and a small arm torque of the special hook wrench is initially tightened.
5. The pressure cap 130 is slightly loosened, and then the sucker rod is connected with the pumping unit according to the relevant requirements.
6. And opening or closing a Christmas tree valve, switching on a power supply, inching and starting the oil pumping unit, coating a proper amount of lubricating oil on the oil pumping polished rod, observing the motion state to ensure that the motion is stable and has no clamping stagnation, and slightly screwing the pressing cap 130 at the moment.
7. When the pumping unit discharges oil, the sealing gland 157 is firstly screwed down until more visible oil is adhered to the surface of the pumping rod, then the mounting seat 153 is screwed down until the oil adhered to the surface of the pumping rod is reduced, and then the sealing gland 157 is continuously screwed down until less visible oil is adhered to the surface of the pumping rod, namely the adjustment is finished.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (7)
1. A kind ofCO2Drive wellhead assembly who recovers oil, its characterized in that includes: the wellhead four-way joint (200), an annulus measuring assembly (210), a blow-down valve (220), an oil delivery main pipe (230), an oil delivery sub-pipe (231), a measuring pipe (232), a blowout preventer (100) and a sealing assembly (150);
the first port (201) of the wellhead four-way (200) is connected with a casing of a wellhead, the second port (202) of the wellhead four-way (200) is connected with the annulus measuring assembly (210), and the third port (203) of the wellhead four-way (200) is connected with the emptying valve (220); the fourth port (204) of the wellhead four-way (200) is connected with the oil pipe through a connecting pipe assembly (240); the connecting pipe assembly (240) is connected with the blowout preventer (100);
the blowout preventer (100) further being connected to the seal assembly (150);
the oil delivery main pipe (230) is connected with the connecting pipe assembly (240), and a stop valve (233), an oil delivery main gate valve (234) and a check valve (235) are sequentially arranged on the oil delivery main pipe (230) along the production liquid conveying direction; a first pressure gauge (236) is connected to the stop valve (233);
the oil transportation main pipe (230) is connected with one end of the measuring pipe (232) and one end of the oil transportation sub-pipe (231);
the measuring pipe (232) is positioned between the check valve (235) and the oil delivery sub-pipe (231);
the blow valve (220) is connected to the measuring tube (232).
2. CO according to claim 12The wellhead device for oil driving and oil production is characterized in that a first port (201) of the wellhead four-way joint (200) is connected with a casing of a wellhead through a casing flange (400) and a casing double male short joint (410).
3. CO according to claim 22A wellhead assembly for driving oil production, characterized in that said coupling tubing assembly (240) comprises a transition flange (241) and a mounting tubing (242);
the conversion flange (241) is arranged on a fourth port (204) of the wellhead four-way (200) and is connected with one end of the installation pipe (242);
one end of the mounting pipe (242) is also communicated with an oil pipe through an oil pipe suspension assembly (243), and the other end of the mounting pipe is connected with the blowout preventer (100);
one end of the oil delivery main pipe (230) is connected with the body of the mounting pipe (242).
4. CO according to claim 32Wellhead device for oil production, characterized in that the blow-down valve (220) is connected with the measuring pipe (232) through a back pressure check valve (221).
5. CO according to claim 32A wellhead for producing oil, characterized in that said annulus measurement assembly (210) comprises: an annular gate valve (211) and a second pressure gauge (212);
the second port (202) of well head cross (200) with annulus gate valve (211) are connected, annulus gate valve (211) with second manometer (212) are connected, annulus gate valve (211) are located second manometer (212) with between well head cross (200).
6. CO according to claim 32The wellhead device for oil displacement is characterized in that the measuring pipe (232) and the oil transportation sub-pipe (231) are sequentially arranged along the conveying direction of produced liquid;
a measuring gate valve (237) is arranged on the measuring pipe (232); an oil delivery sub gate valve (238) is arranged on the oil delivery sub pipe (231).
7. CO according to claim 32Wellhead device for oil recovery, characterized in that it comprises (100): the anti-blowout preventer comprises a ball seat (110), an eccentric adjusting piece (120), a pressing cap (130) and an anti-blowout box assembly (140);
the lower end of the ball seat (110) is connected with the other end of the mounting pipe (242);
the outer wall of the lower part of the eccentric adjusting piece (120) is a spherical surface and is in rotating contact with and sealed with the upper part of the ball seat (110), the eccentric adjusting piece (120) is provided with a mounting through hole (121), the mounting through hole (121) is sleeved on the sucker rod, and the center of the mounting through hole (121) is positioned at the eccentric position of the ball seat (110);
the pressing cap (130) is pressed on the lower part of the eccentric adjusting piece (120) and is connected with the ball seat (110);
the blowout prevention box assembly (140) is sleeved on the sucker rod and is connected with the upper part of the eccentric adjusting piece (120);
the sealing assembly (150) is sleeved on the sucker rod and is connected with the blowout prevention box assembly (140);
the shaft axis of the blowout preventer assembly (140) and the shaft axis of the sealing assembly (150) are coincident with the shaft axis of the mounting through hole (121).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111407819.6A CN114016946A (en) | 2021-11-24 | 2021-11-24 | CO (carbon monoxide)2Wellhead device for oil displacement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111407819.6A CN114016946A (en) | 2021-11-24 | 2021-11-24 | CO (carbon monoxide)2Wellhead device for oil displacement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114016946A true CN114016946A (en) | 2022-02-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111407819.6A Pending CN114016946A (en) | 2021-11-24 | 2021-11-24 | CO (carbon monoxide)2Wellhead device for oil displacement |
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| Country | Link |
|---|---|
| CN (1) | CN114016946A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114809974A (en) * | 2022-05-26 | 2022-07-29 | 东营芯享石油科技有限公司 | Wellhead Christmas tree device for multi-tube corrosion prevention |
| CN117386316A (en) * | 2023-12-08 | 2024-01-12 | 黑龙江港岛科技有限公司 | Digital intelligent gas well wellhead control device |
-
2021
- 2021-11-24 CN CN202111407819.6A patent/CN114016946A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114809974A (en) * | 2022-05-26 | 2022-07-29 | 东营芯享石油科技有限公司 | Wellhead Christmas tree device for multi-tube corrosion prevention |
| CN114809974B (en) * | 2022-05-26 | 2023-11-17 | 大庆新顺丰石油科技开发有限公司 | Wellhead Christmas tree device for multi-pipe corrosion prevention |
| CN117386316A (en) * | 2023-12-08 | 2024-01-12 | 黑龙江港岛科技有限公司 | Digital intelligent gas well wellhead control device |
| CN117386316B (en) * | 2023-12-08 | 2024-02-27 | 黑龙江港岛科技有限公司 | Digital intelligent gas well wellhead control device |
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