WO2023115663A1 - 采油系统、防喷装置以及采油方法 - Google Patents

采油系统、防喷装置以及采油方法 Download PDF

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Publication number
WO2023115663A1
WO2023115663A1 PCT/CN2022/071058 CN2022071058W WO2023115663A1 WO 2023115663 A1 WO2023115663 A1 WO 2023115663A1 CN 2022071058 W CN2022071058 W CN 2022071058W WO 2023115663 A1 WO2023115663 A1 WO 2023115663A1
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WO
WIPO (PCT)
Prior art keywords
annular support
oil
retaining ring
pipe
support surface
Prior art date
Application number
PCT/CN2022/071058
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English (en)
French (fr)
Inventor
姜琳
丁波
赵学洋
Original Assignee
烟台杰瑞石油装备技术有限公司
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Publication of WO2023115663A1 publication Critical patent/WO2023115663A1/zh

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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
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
    • E21B43/121—Lifting well fluids
    • E21B43/129—Adaptations of down-hole pump systems powered by fluid supplied from outside the borehole
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole

Definitions

  • Embodiments of the present disclosure relate to an oil recovery system, a blowout prevention device, and an oil recovery method.
  • the oil production system used for oil extraction can include rod pumps and rodless pumps.
  • rod pumps include beam pumping units, screw pumps, etc.; rodless pumps include hydraulic pumps, electric submersible centrifugal pumps, etc.
  • the oil production system can be used to extract general crude oil, as well as heavy oil and sandy crude oil.
  • Embodiments of the present disclosure provide an oil recovery system, a blowout prevention device, and an oil recovery method.
  • At least one embodiment of the present disclosure provides an oil recovery system, including an oil recovery pump, a connecting device, and a central pipe.
  • the connection device is connected with the oil production pump; the central pipe is connected with the oil production pump, and at least part of the central pipe is located in the connection device.
  • the oil production system also includes a blowout prevention device located at the oil outlet of the oil production pump; the blowout prevention device includes an annular support seat, a retaining ring and a plurality of connecting rods located in the annular support seat, the retaining ring
  • the annular support surface of the annular support base faces the side of the oil production pump and there is a space between the annular support surface, and the annular support surface includes a plurality of openings penetrated by a plurality of connecting rods , the retaining ring is connected to the annular supporting surface through a plurality of connecting rods;
  • the central tube passes through the retaining ring opening of the retaining ring and the opening of the annular supporting surface, and the inner side of the retaining ring is connected to the annular supporting surface.
  • the central tube is in sealing contact, the outer side of the stop ring is in sealing contact with the inner wall of the annular support seat, and the outer side of the annular support seat is configured to be in sealing contact with at least part of the inner wall of
  • the connecting device includes a first connecting pipe and a second connecting pipe, the first connecting pipe is located on the side of the second connecting pipe away from the oil production pump, the first The inner diameter of at least part of the connecting pipe is smaller than the inner diameter of the second connecting pipe, and the outer side of the annular support seat is configured to be in sealing contact with the at least part of the inner wall of the first connecting pipe.
  • the length of the second connecting pipe is greater than the length of the annular support base, and along a direction parallel to the inner diameter of the second connecting pipe, the The length of the inner diameter of the second connecting pipe is greater than the size of the annular support seat.
  • a portion of the side wall of the annular support seat between the annular support surface and the oil recovery pump includes at least one side wall opening.
  • the opening of the side wall close to the annular support surface
  • the shortest distance between the edge of the ring and the annular support surface is smaller than the size of the gap between the retaining ring and the annular support surface.
  • the annular support seat is provided with an opening, and the opening is located on a side of the annular support surface away from the retaining ring.
  • each connecting rod includes a rod body and a rod head on at least one side of the rod body, and along a direction parallel to the diameter of the hole, the size of the rod head is larger than that of the hole
  • the diameter of the hole, the rod head on one side of the rod body is located on the side of the annular support surface away from the retaining ring.
  • the length of the side wall of the annular support seat on the side of the annular support surface facing the oil recovery pump is not less than that of the side wall of the annular support surface.
  • the length of the connecting rod facing the side of the oil production pump is not less than that of the side wall of the annular support surface.
  • the oil production system further includes: an outer oil pipe, and the outer oil pipe is connected to the oil production pump through the connecting device.
  • the oil recovery pump is a rodless oil recovery pump.
  • At least one embodiment of the present disclosure provides a blowout preventer, including an annular support seat, a plurality of connecting rods and a retaining ring.
  • the annular support seat includes an annular support surface; a plurality of connecting rods are located in the annular support seat; and the retaining ring is located in the annular support seat.
  • the retaining ring is located on one side of the annular support surface and is provided with a space between the annular support surface, the retaining ring opening of the retaining ring is directly opposite to the opening of the annular support surface, and the annular support surface It includes a plurality of openings penetrated by a plurality of connecting rods, the retaining ring is connected to the annular supporting surface through a plurality of connecting rods; the outer side of the retaining ring is in sealing contact with the inner wall of the annular supporting seat A first sealing ring is arranged inside the opening of the retaining ring, and a second sealing ring is arranged outside the annular support seat.
  • the side wall of the annular support seat on the side of the annular support surface where the retaining ring is disposed includes at least one side wall opening.
  • the edge of the side wall opening close to the annular support surface and The shortest distance between said annular support surfaces is smaller than the dimension of said spacing.
  • the annular support seat is provided with an opening, and the opening is located on a side of the annular support surface away from the retaining ring.
  • each connecting rod includes a rod body and a rod head on at least one side of the rod body, and along a direction parallel to the diameter of the hole, the size of the rod head is larger than that of the hole
  • the diameter of the hole, the rod head on one side of the rod body is located on the side of the annular support surface away from the retaining ring.
  • the length of the side wall of the annular support seat on the side of the annular support surface away from the opening is no less than that of the side wall of the annular support surface away from the opening.
  • the length of the connecting rod on one side of the opening is no less than that of the side wall of the annular support surface away from the opening.
  • At least one embodiment of the present disclosure provides an oil production method using the above-mentioned oil production system, including putting the oil production system into an underground oil layer; installing the central oil pipe underground through the outer oil pipe of the oil production system, and the outer oil pipe passes through the
  • the connection device is connected with the oil recovery pump.
  • the blowout preventer is configured to prevent high-pressure liquid from ejecting before the central oil pipe is inserted into the outer oil pipe; the central oil pipe hits the blowout preventer during insertion into the outer oil pipe so that the blowout preventer
  • the device breaks away from its sealing contact position with the connecting device, and after the blowout preventer falls, the central oil pipe communicates with the central pipe.
  • Fig. 1 is a partial structural schematic diagram of an oil recovery system provided according to an embodiment of the present disclosure
  • Fig. 2 is the schematic cross-sectional structure diagram of the blowout preventer in the oil production system shown in Fig. 1;
  • Fig. 3 is a cross-sectional view of the connecting device, central pipe and connecting flange of the oil production system shown in Fig. 1;
  • Figure 4 is a central oil tube and transition head configured to be inserted into the outer oil tube shown in Figure 1;
  • Fig. 5 is a schematic diagram of inserting the central oil pipe and transition head shown in Fig. 4 into the outer oil pipe of the oil production system shown in Fig. 1 .
  • Embodiments of the present disclosure provide an oil recovery system, a blowout prevention device, and an oil recovery method.
  • the oil production system includes an oil production pump, a connecting device and a center pipe.
  • the connection device is connected with the oil production pump; the central pipe is connected with the oil production pump, and at least part of the central pipe is located in the connection device.
  • the oil production system also includes a blowout prevention device, which is located at the oil outlet of the oil production pump; the blowout prevention device includes an annular support seat, a retaining ring and a plurality of connecting rods located in the annular support seat, and the retaining ring is located on the annular support surface of the annular support seat. There is an interval between one side of the oil pump and the annular support surface.
  • the annular support surface includes a plurality of openings penetrated by a plurality of connecting rods.
  • the retaining ring is connected with the annular supporting surface through a plurality of connecting rods;
  • the opening of the baffle ring and the opening of the annular support surface, the inner side of the baffle ring is in sealing contact with the central tube, the outer side of the baffle ring is in sealing contact with the inner wall of the annular support seat, and the outer side of the annular support seat is configured to be in contact with at least part of the inner wall of the connecting device Sealed contacts.
  • the blowout prevention device at the oil outlet of the oil production pump provided by the embodiments of the present disclosure can prevent the high-pressure liquid from spraying out from the connection device as far as possible when the pressure of the oil well where the oil production system is located suddenly increases, thereby preventing the occurrence of blowout accidents.
  • Fig. 1 is a schematic diagram of a partial structure of an oil recovery system provided according to an embodiment of the present disclosure
  • Fig. 2 is a schematic cross-sectional structure diagram of a blowout prevention device in the oil recovery system shown in Fig. 1
  • Fig. 3 is a schematic diagram of a connecting device, center The cross-sectional view of the pipe and the connecting flange
  • Figure 4 is the central oil pipe and transition head configured to be inserted into the outer oil pipe shown in Figure 1
  • Figure 5 is the insertion of the outer oil pipe of the oil production system shown in Figure 1 into the central oil pipe shown in Figure 4 and a schematic diagram of the transition head.
  • the oil recovery system includes an oil recovery pump 100 , a connecting device 200 and a central pipe 300 .
  • the connection device 200 is connected to the oil production pump 100
  • the central pipe 300 is configured to be connected to the oil production pump 100
  • at least part of the central pipe 300 is located in the connection device 200 .
  • the oil recovery system further includes a blowout preventer 400, and the blowout preventer 400 is located at the oil outlet of the oil recovery pump 100.
  • the blowout preventer 400 includes an annular support seat 410 and a plurality of connecting rods 420 and retaining rings 430 located in the annular support seat 410.
  • the retaining ring 430 is located on the side of the annular support surface 411 of the annular support seat 410 facing the oil recovery pump 100 and is in contact with the annular support seat 410. Spaces are provided between the supporting surfaces 411 , the annular supporting surface 411 includes a plurality of openings 4111 penetrated by a plurality of connecting rods 420 , and the retaining ring 430 is connected to the annular supporting surface 411 through the plurality of connecting rods 420 .
  • the central tube 300 passes through the opening 431 of the retaining ring 430 and the opening 4110 of the annular support surface 411, the inner side of the retaining ring 430 is in sealing contact with the central pipe 300, and the outer side of the retaining ring 430 is in contact with the ring.
  • the inner wall of the support seat 410 is in sealing contact, and the outer side of the annular support seat 410 is configured to be in sealing contact with at least part of the inner wall of the connecting device 200 .
  • the blowout prevention device at the oil outlet of the oil production pump provided by the embodiments of the present disclosure can prevent the high-pressure liquid from spraying out from the connection device as far as possible when the pressure of the oil well where the oil production system is located suddenly increases, thereby preventing the occurrence of blowout accidents.
  • the inner side of the stop ring 430 is in sealing contact with the central tube 300
  • the outer side of the stop ring 430 is in sealing contact with the inner wall of the annular support seat 410
  • the outer side of the annular support seat 410 is in sealing contact with the inner wall of the connecting device 200, which can prevent the impact of high-pressure liquid
  • the blowout preventer is displaced relative to the connection device and the high-pressure liquid passes through the blowout preventer.
  • a sealing ring 401 is provided on the outer side of the annular support seat 410 so that the outer side of the annular support seat 410 is in sealing contact with the inner wall of the connecting device 200 .
  • a ring of grooves is provided on the outer side of the annular support surface 411 of the annular support seat 410 for placing the sealing ring 401 .
  • a sealing ring 403 is provided on the outer side of the retaining ring 430 to be in sealing contact with the inner wall of the annular support seat 410 .
  • a ring of grooves is provided on the outer side of the retaining ring 430 for placing the sealing ring 403 .
  • a sealing ring 402 is provided on the inner side of the retaining ring 430 to be in sealing contact with the central tube 300 .
  • a groove is provided on the inner side of the retaining ring 430 for placing the sealing ring 402 .
  • Fig. 2 schematically shows that the number of sealing rings 401 is one ring, the number of sealing rings 402 is two rings, and the number of sealing rings 403 is two rings, but it is not limited thereto, the number of sealing rings at each position can be Set according to product requirements.
  • the retaining ring 430 is located on the side of the annular support surface 411 of the annular support seat 410 facing the oil production pump 100 and there is a gap between the annular support surface 411.
  • the high-pressure liquid impacts the retaining ring instantly.
  • the retaining ring moves to the annular support surface, that is, the retaining ring moves upward to seal the openings and openings of the annular support seat.
  • the greater the pressure of the high-pressure liquid the better the sealing effect.
  • the greater the pressure of the high-pressure liquid the better the sealing effect.
  • the opening 431 of the retaining ring 430 is opposite to the opening 4110 of the annular support surface 411 so that the central tube 300 can pass through the two openings.
  • the opening 4110 of the annular support surface 411 may be in non-seal contact with the center pipe 300, and the gap between the two may allow oil to pass through.
  • the opening 4111 of the annular support surface 411 and the connecting rod 420 passing through the opening 4111 may be in non-seal contact, and the gap between the two may pass oil.
  • the oil recovery pump 100 may be a rodless oil recovery pump, for example, a hydraulic double-acting rodless oil recovery pump.
  • the hydraulic double-acting rodless oil production pump can use the ground power pump to transfer the pressurized hydraulic flow down the power fluid transmission pipe to the liquid inlet pipeline of the hydraulic double-acting rodless oil production pump.
  • the hydraulic energy is converted into mechanical energy and reciprocates up and down to make the reciprocating pump reciprocate, so that the pump chamber drives the crude oil pipeline to achieve oil suction and lifting.
  • This kind of rodless oil production pump has no pump rod, can adapt to highly deviated wells or horizontal wells, and can prevent major mechanical accidents such as eccentric wear or sucker rod drop caused by reciprocating movement.
  • the center pipe 300 may be referred to as a power fluid transfer pipe configured to transfer pressurized power fluid.
  • the central pipe 300 may be connected with the oil production pump 100, and the power fluid drives the oil production pump 100 to reciprocate.
  • the power fluid may include water.
  • the oil production system further includes an outer oil pipe 500 , and the outer oil pipe 500 is connected to the oil production pump 100 through the connecting device 200 .
  • the outer tubing 500 is configured to be inserted into the central tubing 602
  • the central tubing 300 is configured to connect the central tubing 602 and the oil recovery pump 100 .
  • the central oil pipe 602 communicates with the central pipe 300
  • the central oil pipe 602 is configured to transmit the pressurized power fluid to the oil recovery pump 100 through the central pipe 300 .
  • the central oil pipe 602 can be connected with the transition head 603 and installed underground from the middle of the outer oil pipe 500 .
  • base tube 300 is configured to be inserted into transition head 603 to communicate with center oil tube 602 .
  • connection flange 601 the casing of the oil production pump 100 is connected with the connection flange 601
  • the center pipe 300 is connected with the center hole of the oil production pump 100 inside the connection flange 601
  • the connection device 200 is connected with the connection method Lan 601 is threaded.
  • the embodiment of the present disclosure is not limited thereto, and other connection manners may also be used.
  • the oil recovery pump 100 may include a transfer pipeline communicated with the outer oil pipe 500 to lift the oil sucked from the crude oil pipeline to the surface through the outer oil pipe 500 .
  • the connecting device 200 may be a connecting pipe, and the blowout preventer 400 is located in the connecting pipe.
  • the connecting device 200 includes a first connecting pipe 210 and a second connecting pipe 220.
  • the first connecting pipe 210 is located on the side of the second connecting pipe 220 away from the oil production pump 100.
  • the first connecting pipe At least part of the inner diameter of the second connecting pipe 210 is smaller than the inner diameter of the second connecting pipe 220 , and the outer side of the annular support seat 410 is configured to be in sealing contact with the aforementioned at least part of the inner wall of the first connecting pipe 210 .
  • the first connection pipe 210 and the second connection pipe 220 are connected to each other.
  • the length of the first connecting tube 210 is smaller than the length of the second connecting tube 220 .
  • the blowout preventer 400 is located in the first connecting pipe 210 near the second connecting pipe 220 .
  • all of the blowout preventer 400 is located in the first connecting pipe 210 , or a part of the blowout preventer 400 is located in the first connecting pipe 210 , and another part of the blowout preventer 400 is located in the second connecting pipe 220 .
  • the length of the first connecting pipe 210 is greater than the length of the blowout preventer 400 .
  • the length of the second connecting pipe 220 is greater than the length of the annular support seat 410, and along a direction parallel to the inner diameter of the second connecting pipe 220 (as shown in FIG. In the X direction, but not limited to this direction, the extension direction of the inner diameter of the second connecting pipe 220 can be any direction perpendicular to the Y direction), and the length of the inner diameter of the second connecting pipe 220 is greater than the size of the annular support seat 410 (such as outer diameter or width).
  • the oil production system (such as the oil production system shown in Figure 1) is put into the underground oil layer first, and then the central oil pipe 602 (the central oil pipe 602 shown in Figure 4 and the transition head 603) Install underground through the outer oil pipe 500 (the outer oil pipe 500 shown in FIG. 1 ), and the structure after the central oil pipe 602 is inserted into the oil recovery system shown in FIG. 1 is shown in FIG. 5 .
  • the blowout preventer 400 is configured to prevent high-pressure liquid from ejecting before the central oil pipe 602 is inserted into the outer oil pipe 500; the central oil pipe 602 hits the blowout preventer 400 during insertion into the outer oil pipe 500 so that the blowout preventer 400 is separated from the connecting device 200
  • the position of sealing contact such as the blowout preventer 400 is separated from the position of sealing contact with the first connecting pipe 210, after the blowout preventer 400 falls from the first connecting pipe 210 into the second connecting pipe 220, the center oil pipe 602 and the center pipe 300 connection, after which oil production can begin.
  • the central oil pipe is a structure other than the oil production system.
  • the portion of the side wall of the annular support seat 410 between the annular support surface 411 and the oil recovery pump 100 includes at least one side wall opening 412 .
  • Fig. 2 schematically shows that the side wall of the annular support seat 410 is provided with three side wall openings 412, but not limited thereto, two side wall openings may also be provided, and more side wall openings may be provided, and the side walls The number of openings can be set according to product requirements.
  • the shape of the side wall opening 412 may be circular, but not limited thereto, and may also be oval or other shapes, which may be set according to product requirements.
  • the shortest distance between the edge of the side wall opening 412 close to the annular support surface 411 and the annular support surface 411 is less than the retaining ring. 430 in size.
  • the shortest distance between the upper end of the sidewall opening 412 and the annular support surface 411 is smaller than the size of the retaining ring 430 so that the retaining ring 430 can completely block the sidewall opening when it is impacted by the high-pressure liquid and comes into contact with the annular support surface 411 412 , to prevent the high-pressure liquid from impacting upward through the side wall opening 412 .
  • the edge of the side wall opening 412 close to the annular support surface 411 is in contact with the annular support surface 411.
  • the shortest distance between the supporting surfaces 411 is smaller than the dimension of the interval between the retaining ring 430 and the annular supporting surfaces 411 .
  • the retaining ring 430 can be located at the position with the largest distance from the annular support surface 411. During the process of the high-pressure liquid impacting the retaining ring 430, the retaining ring 430 is close to the annular support surface.
  • the distance between the stop ring 430 and the annular support surface 411 gradually decreases during the movement of the stop ring 430, that is, the distance between the stop ring 430 and the annular support surface 411 gradually decreases.
  • the retaining ring 430 does not completely cover the sidewall opening 412 , and oil can flow into the annular supporting seat 410 through the sidewall opening 412 .
  • the annular support seat 410 is provided with an opening 413 , and the opening 413 is located on a side of the annular support surface 411 away from the retaining ring 430 .
  • base tube 300 may pass through opening 413 .
  • opening 413 may expose connecting rod 420 .
  • opening 413 may expose annular support surface 411 .
  • the sidewall of the annular supporting seat 410 surrounds the opening 413 .
  • the blowout preventer falls into the second connecting pipe, the side wall opening of the annular support seat, the gap between the annular support surface and the central pipe, and the annular support
  • the gap between the opening on the surface and the connecting rod and the opening of the annular support seat can form a channel for circulating oil, so as to prevent the blowout preventer from affecting the oil production effect in the second connecting pipe.
  • each connecting rod 420 includes a rod body 421 and a rod head 422 located on at least one side of the rod body 421 .
  • the size of the rod head 422 is larger than the diameter of the hole 4111 , so that the rod head 422 can be clamped on the annular support surface 411 .
  • the size of the rod head 422 is larger than the size of the rod body 421 along the direction (X direction in the figure) intersecting with the extension direction of the rod body 421 (the Y direction in the figure), and the rod head 422 on one side of the rod body 421 is located in the ring
  • the supporting surface 411 is away from the side of the retaining ring 430 .
  • the size of the rod head 422 on one side of the rod body 421 is larger than the size of the hole formed on the annular support surface 411 and penetrated by the rod body 421 .
  • the connecting rod 420 may only include a rod head 422 on one side of the rod body 421.
  • the retaining ring 430 is connected.
  • a rod head 422 may also be provided on the other side of the rod body 421 , and the rod head 422 is located on a side of the retaining ring 430 away from the annular support surface 411 .
  • the baffle ring 430 includes a baffle ring opening that is penetrated by the rod 421. The opening of the baffle ring and the corresponding rod 421 can be in sealing contact to prevent part of the liquid from flowing out of the baffle ring during the process of the high-pressure liquid impacting the baffle ring. shoot.
  • the rod head 422 on one side of the rod body 421 can be fixed on the annular support surface 411 , and when the high-pressure liquid impacts the stop ring 430 , the stop ring 430 can move upward along the rod body 421 .
  • the connecting rod 420 may not be fixed on the annular supporting surface 411, but on the retaining ring 430, and when the high-pressure liquid impacts the retaining ring 430, the retaining ring 430 moves upward together with the connecting rod 420.
  • the length of the side wall 414 of the annular support seat 410 on the side of the annular support surface 411 facing the oil production pump 100 is not less than that on the side of the annular support surface 411 facing the production pump 100.
  • the length of the connecting rod 420 on one side of the oil pump 100 is not exceed the bottom of the annular supporting seat 410, so that when the blowout preventer falls into the second connecting pipe, the annular supporting seat plays a role of supporting the connecting rod and the retaining ring.
  • the length of the sidewall of the annular support surface 411 away from the retaining ring 430 may be shorter than the length of the sidewall 414 of the annular support surface 411 away from the opening 413 .
  • FIG. 2 is a cross-sectional schematic diagram of a blowout preventer provided according to another embodiment of the present disclosure.
  • the blowout preventer provided in this embodiment can be applied to the oil production system shown in Fig. 1 , Fig. 3 to Fig. 5 .
  • the blowout preventer provided in this embodiment may be the blowout preventer in the oil production system shown in FIG. 1 , FIG. 3 to FIG. 5 .
  • the blowout preventer 400 includes an annular support seat 410 , a retaining ring 430 and a plurality of connecting rods 420 .
  • the annular support seat 410 includes an annular support surface 411 , and the connecting rod 420 and the retaining ring 430 are located in the annular support seat 410 .
  • the retaining ring 430 is located on one side of the annular supporting surface 411 and is provided with a space between the annular supporting surface 411, the retaining ring opening 431 of the retaining ring 430 is opposite to the opening 4110 of the annular supporting surface 411, and the annular supporting surface 411 includes a plurality of A plurality of openings 4111 through which the connecting rod 420 passes, the stop ring 430 is connected with the annular support surface 411 through a plurality of connecting rods 420; A sealing ring 402 , and a second sealing ring 401 is provided outside the annular support seat 410 .
  • the blowout prevention device provided by the embodiments of the present disclosure can be applied to the oil production system to prevent the high-pressure liquid from spraying out from the connection device as far as possible when the pressure of the oil well where the oil production system is located suddenly increases, thereby preventing the occurrence of blowout accidents.
  • the second sealing ring 401 disposed outside the annular support seat 410 is configured such that the outer side of the annular support seat 410 is in sealing contact with the inner wall of the connecting device.
  • a sealing ring 403 is provided on the outer side of the retaining ring 430 to be in sealing contact with the inner wall of the annular support seat 410 .
  • the first sealing ring 402 disposed on the inner side of the retaining ring 430 is configured to be in sealing contact with the central tube 300 .
  • the inner side of the retaining ring is in sealing contact with the central tube
  • the outer side of the retaining ring is in sealing contact with the inner wall of the annular support seat
  • the outer side of the annular support seat is in sealing contact with the inner wall of the connecting device, which can prevent the high pressure liquid from impacting the blowout preventer. Displacement occurs relative to the connecting device and high-pressure liquid passes through the inside of the blowout preventer.
  • the stop ring 430 is located below the annular support seat 410 and there is a gap between the annular support surface 411.
  • the high-pressure liquid impacts the retaining ring instantly.
  • the retaining ring moves to the annular support surface, that is, the retaining ring moves upward to seal the openings and openings of the annular support seat.
  • the greater the pressure of the high-pressure liquid the greater the sealing The better the plugging effect, the better to prevent blowout accidents.
  • the sidewall of the annular support seat 410 on the side of the annular support surface 411 on which the retaining ring 430 is disposed includes at least one sidewall opening 412 .
  • Fig. 2 schematically shows that the side wall of the annular support seat 410 is provided with three side wall openings 412, but not limited thereto, two side wall openings may also be provided, and more side wall openings may be provided, and the side walls
  • the number of openings can be set according to product requirements.
  • the shape of the side wall opening 412 may be circular, but not limited thereto, and may also be oval or other shapes, which may be set according to product requirements.
  • the shortest distance between the edge of the sidewall opening 412 close to the annular support surface 411 and the annular support surface 411 is smaller than the size of the retaining ring 430 .
  • the shortest distance between the upper end of the sidewall opening 412 and the annular support surface 411 is smaller than the size of the retaining ring 430 so that the retaining ring 430 can completely block the sidewall opening when it is impacted by the high-pressure liquid and comes into contact with the annular support surface 411 412 , to prevent the high-pressure liquid from impacting upward through the side wall opening 412 .
  • the edge of the side wall opening 412 close to the annular support surface 411 is in contact with the annular support surface 411.
  • the shortest distance therebetween is smaller than the dimension of the interval between the retaining ring 430 and the annular supporting surface 411 .
  • the retaining ring 430 can be located at the position with the largest distance from the annular support surface 411. During the process of the high-pressure liquid impacting the retaining ring 430, the retaining ring 430 is close to the annular support surface.
  • the distance between the stop ring 430 and the annular support surface 411 gradually decreases during the movement of the stop ring 430, that is, the distance between the stop ring 430 and the annular support surface 411 gradually decreases.
  • the retaining ring 430 does not completely cover the sidewall opening 412 , and oil can flow into the annular supporting seat 410 through the sidewall opening 412 .
  • the annular support seat 410 is provided with an opening 413 , and the opening 413 is located on a side of the annular support surface 411 away from the retaining ring 430 .
  • opening 413 may expose connecting rod 420 .
  • opening 413 may expose annular support surface 411 .
  • the sidewall of the annular supporting seat 410 surrounds the opening 413 .
  • each connecting rod 420 includes a rod body 421 and a rod head 422 positioned at least one side of the rod body 421, along a direction intersecting with the extension direction of the rod body 421 (the Y direction in the figure) (as shown in the figure).
  • the size of the rod head 422 is greater than the size of the rod body 421
  • the rod head 422 on one side of the rod body 421 is located on the side of the annular support surface 411 away from the retaining ring 430.
  • the size of the rod head 422 on one side of the rod body 421 is larger than the size of the hole formed on the annular support surface 411 through which the rod body 421 passes, so that the rod head 422 can be clamped on the annular support surface 411 .
  • the connecting rod 420 may only include a rod head 422 on one side of the rod body 421.
  • the retaining ring 430 is connected.
  • a rod head 422 may also be provided on the other side of the rod body 421 , and the rod head 422 is located on a side of the retaining ring 430 away from the annular support surface 411 .
  • the baffle ring 430 includes a baffle ring opening that is penetrated by the rod 421. The opening of the baffle ring and the corresponding rod 421 can be in sealing contact to prevent part of the liquid from flowing out of the baffle ring during the process of the high-pressure liquid impacting the baffle ring. shoot.
  • the rod head 422 on one side of the rod body 421 can be fixed on the annular support surface 411 , and when the high-pressure liquid impacts the stop ring 430 , the stop ring 430 can move upward along the rod body 421 .
  • the connecting rod 420 may not be fixed on the annular supporting surface 411, but on the retaining ring 430, and when the high-pressure liquid impacts the retaining ring 430, the retaining ring 430 moves upward together with the connecting rod 420.
  • the length of the side wall 414 of the annular support seat 410 on the side of the annular support surface 411 away from the opening 413 is not less than that on the side of the annular support surface 411 away from the retaining ring 430.
  • the length of the connecting rod 420 For example, the bottom of the connecting rod 420 will not exceed the bottom of the annular supporting seat 410, so that when the blowout preventer falls into the second connecting pipe, the annular supporting seat plays a role of supporting the connecting rod and the retaining ring.
  • the length of the sidewall of the annular support surface 411 away from the retaining ring 430 may be shorter than the length of the sidewall of the annular support surface 411 away from the opening 413 .
  • the oil production method includes: putting the oil production system into an underground oil layer; installing the central oil pipe 602 underground through the outer oil pipe 500 of the oil production system, wherein the outer The oil pipe 500 is connected with the oil production pump 100 through the connecting device 200; the blowout preventer 400 is configured to prevent the high-pressure liquid from ejecting before the central oil pipe 602 is inserted into the outer oil pipe 500; To make the blowout preventer 400 out of its sealing contact position with the connecting device 200 , after the blowout preventer 400 falls, the central oil pipe 602 communicates with the central pipe 300 .
  • the oil production system (such as the oil production system shown in Figure 1) is put into the underground oil layer first, and then the central oil pipe 602 (the central oil pipe 602 shown in Figure 4 and the transition head 603) Install underground through the outer oil pipe 500 (the outer oil pipe 500 shown in FIG. 1 ), and the structure after the central oil pipe 602 is inserted into the oil recovery system shown in FIG. 1 is shown in FIG. 5 .
  • the blowout preventer 400 is configured to prevent high-pressure liquid from ejecting before the central oil pipe 602 is inserted into the outer oil pipe 500; the central oil pipe 602 hits the blowout preventer 400 during insertion into the outer oil pipe 500 so that the blowout preventer 400 is separated from the connecting device 200
  • the position of sealing contact such as the blowout preventer 400 is separated from the position of sealing contact with the first connecting pipe 210, after the blowout preventer 400 falls from the first connecting pipe 210 into the second connecting pipe 220, the center oil pipe 602 and the center pipe 300 connection, after which oil production can begin.

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Abstract

一种采油系统、防喷装置以及采油方法。采油系统包括采油泵(100)、连接装置(200)以及中心管(300)。连接装置(200)与采油泵(100)连接；中心管(300)与采油泵(100)连接，中心管(300)的至少部分位于连接装置(200)中。采油系统还包括防喷装置(400)，位于采油泵(100)的出油口；防喷装置(400)包括环形支撑座(410)以及位于环形支撑座(410)内的挡环(430)和连接杆(420)，挡环(430)位于环形支撑座(410)的环形支撑面(411)面向采油泵(100)的一侧且与环形支撑面(411)之间设置有间隔，挡环(430)通过连接杆(420)与环形支撑面(411)连接；中心管(300)穿过挡环(430)的挡环开口(431)和环形支撑面(411)的开口(4110)，挡环(430)的内侧与中心管(300)密封接触，挡环(430)的外侧与环形支撑座(410)的内壁密封接触，环形支撑座(410)的外侧被配置为与连接装置(400)的至少部分的内壁密封接触。防喷装置可以在该采油系统所在油井压力突增时，防止井喷事故的发生。

Description

采油系统、防喷装置以及采油方法
本申请要求于2021年12月21日递交的中国专利申请第202111573907.3号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。
技术领域
本公开的实施例涉及一种采油系统、防喷装置以及采油方法。
背景技术
一般，开采石油使用的采油系统可以包括有杆泵和无杆泵两种，通常有杆泵包括游梁式抽油机、螺杆泵等；无杆泵包括水力泵、电潜离心泵等。采油系统可用于开采一般原油，也可开采稠油、含砂原油。
发明内容
本公开的实施例提供一种采油系统、防喷装置以及采油方法。
本公开的至少一实施例提供一种采油系统，包括采油泵、连接装置以及中心管。所述连接装置与所述采油泵连接；所述中心管与所述采油泵连接，且所述中心管的至少部分位于所述连接装置中。所述采油系统还包括防喷装置，位于所述采油泵的出油口；所述防喷装置包括环形支撑座以及位于所述环形支撑座内的挡环和多个连接杆，所述挡环位于所述环形支撑座的环形支撑面面向所述采油泵的一侧且与所述环形支撑面之间设置有间隔，所述环形支撑面包括被多个所述连接杆贯穿的多个开孔，所述挡环通过多个所述连接杆与所述环形支撑面连接；所述中心管穿过所述挡环的挡环开口和所述环形支撑面的开口，所述挡环的内侧与所述中心管密封接触，所述挡环的外侧与所述环形支撑座的内壁密封接触，所述环形支撑座的外侧被配置为与所述连接装置的至少部分的内壁密封接触。
例如，根据本公开的实施例，所述连接装置包括第一连接管和第二连接管，所述第一连接管位于所述第二连接管远离所述采油泵的一侧，所述第一连接管的至少部分的内径小于所述第二连接管的内径，所述环形支撑座的外侧被配置为与所述第一连接管的所述至少部分的内壁密封接触。
例如，根据本公开的实施例，沿所述中心管的延伸方向，所述第二连接管的长度大于所述环形支撑座的长度，且沿平行于所述第二连接管内径的方向，所述第二连接管内径的长度大于环形支撑座的尺寸。
例如，根据本公开的实施例，所述环形支撑座的侧壁中位于所述环形支撑面与所述采油泵之间的部分包括至少一个侧壁开口。
例如，根据本公开的实施例，所述挡环与所述环形支撑面之间的所述间隔尺寸最大时，沿所述中心管的延伸方向，所述侧壁开口的靠近所述环形支撑面的边缘与所述环形支撑面之间的最短距离小于所述挡环与所述环形支撑面之间的所述间隔的尺寸。
例如，根据本公开的实施例，所述环形支撑座设置有开口，所述开口位于所述环形支撑面远离所述挡环的一侧。
例如，根据本公开的实施例，每个连接杆包括杆体以及位于所述杆体的至少一侧的杆头，沿平行于所述开孔的孔径的方向，所述杆头的尺寸大于所述开孔的孔径，所述杆体一侧的杆头位于所述环形支撑面远离所述挡环的一侧。
例如，根据本公开的实施例，沿所述连接杆的延伸方向，位于所述环形支撑面面向所述采油泵一侧的所述环形支撑座的侧壁的长度不小于位于所述环形支撑面面向所述采油泵一侧的所述连接杆的长度。
例如，根据本公开的实施例，采油系统还包括：外侧油管，所述外侧油管通过所述连接装置与所述采油泵连接。
例如，根据本公开的实施例，所述采油泵为无杆采油泵。
本公开的至少一实施例提供一种防喷装置，包括环形支撑座、多个连接杆以及挡环。所述环形支撑座包括环形支撑面；多个所述连接杆位于所述环形支撑座内；所述挡环位于所述环形支撑座内。所述挡环位于所述环形支撑面的一侧且与所述环形支撑面之间设置有间隔，所述挡环的挡环开口与所述环形支撑面的开口正对，所述环形支撑面包括被多个所述连接杆贯穿的多个开孔，所述挡环通过多个所述连接杆与所述环形支撑面连接；所述挡环的外侧与所述环形支撑座的内壁密封接触，所述挡环开口内侧设置有第一密封圈，所述环形支撑座外侧设置有第二密封圈。
例如，根据本公开的实施例，位于所述环形支撑面的设置有所述挡环一侧的所述环形支撑座的侧壁包括至少一个侧壁开口。
例如，根据本公开的实施例，所述挡环位于与所述环形支撑面距离最大位 置处时，沿所述连接杆的延伸方向，所述侧壁开口的靠近所述环形支撑面的边缘与所述环形支撑面之间的最短距离小于所述间隔的尺寸。
例如，根据本公开的实施例，所述环形支撑座设置有开口，所述开口位于所述环形支撑面远离所述挡环的一侧。
例如，根据本公开的实施例，每个连接杆包括杆体以及位于所述杆体的至少一侧的杆头，沿平行于所述开孔的孔径的方向，所述杆头的尺寸大于所述开孔的孔径，所述杆体一侧的杆头位于所述环形支撑面远离所述挡环的一侧。
例如，根据本公开的实施例，沿所述连接杆的延伸方向，位于所述环形支撑面远离所述开口一侧的所述环形支撑座的侧壁的长度不小于位于所述环形支撑面远离所述开口一侧的所述连接杆的长度。
本公开的至少一实施例提供一种使用上述采油系统的采油方法，包括将所述采油系统投入地下油层中；将中心油管通过所述采油系统的外侧油管往地下安装，所述外侧油管通过所述连接装置与所述采油泵连接。所述防喷装置被配置为在所述中心油管插入所述外侧油管之前防止高压液体喷出；所述中心油管在插入所述外侧油管的过程中撞击所述防喷装置以使所述防喷装置脱离其与所述连接装置密封接触的位置，所述防喷装置掉落后，所述中心油管与所述中心管连通。
附图说明
为了更清楚地说明本公开实施例的技术方案，下面将对实施例的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本公开的一些实施例，而非对本公开的限制。
图1为根据本公开实施例提供的采油系统的局部结构示意图；
图2为图1所示采油系统中的防喷装置的截面结构示意图；
图3为图1所示采油系统的连接装置、中心管以及连接法兰的截面图；
图4为被配置为插入图1所示的外侧油管的中心油管以及过渡头；以及
图5为在图1所示采油系统的外侧油管插入图4所示中心油管以及过渡头的示意图。
具体实施方式
为使本公开实施例的目的、技术方案和优点更加清楚，下面将结合本公开 实施例的附图，对本公开实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本公开的一部分实施例，而不是全部的实施例。基于所描述的本公开的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其它实施例，都属于本公开保护的范围。
除非另外定义，本公开使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。
本公开的实施例提供一种采油系统、防喷装置以及采油方法。采油系统包括采油泵、连接装置以及中心管。连接装置与采油泵连接；中心管与采油泵连接，且中心管的至少部分位于连接装置中。采油系统还包括防喷装置，位于采油泵的出油口；防喷装置包括环形支撑座以及位于环形支撑座内的挡环和多个连接杆，挡环位于环形支撑座的环形支撑面面向采油泵的一侧且与环形支撑面之间设置有间隔，环形支撑面包括被多个连接杆贯穿的多个开孔，挡环通过多个连接杆与环形支撑面连接；中心管穿过挡环的挡环开口和环形支撑面的开口，挡环的内侧与中心管密封接触，挡环的外侧与环形支撑座的内壁密封接触，环形支撑座的外侧被配置为与连接装置的至少部分的内壁密封接触。本公开实施例提供的位于采油泵出油口的防喷装置，可以在该采油系统所在油井压力突增时，尽量防止高压液体从连接装置喷出，从而防止井喷事故的发生。
下面结合附图对本公开实施例提供的采油系统、防喷装置以及采油方法进行描述。
图1为根据本公开实施例提供的采油系统的局部结构示意图，图2为图1所示采油系统中的防喷装置的截面结构示意图，图3为图1所示采油系统的连接装置、中心管以及连接法兰的截面图，图4为被配置为插入图1所示的外侧油管的中心油管以及过渡头，图5为在图1所示采油系统的外侧油管插入图4所示中心油管以及过渡头的示意图。
如图1所示，采油系统包括采油泵100、连接装置200以及中心管300。连接装置200与采油泵100连接，中心管300被配置为与采油泵100连接，且中心管300的至少部分位于连接装置200中。如图1至图5所示，采油系统还 包括防喷装置400，防喷装置400位于采油泵100的出油口。防喷装置400包括环形支撑座410以及位于环形支撑座410内的多个连接杆420和挡环430，挡环430位于环形支撑座410的环形支撑面411面向采油泵100的一侧且与环形支撑面411之间设置有间隔，环形支撑面411包括被多个连接杆420贯穿的多个开孔4111，挡环430通过多个连接杆420与环形支撑面411连接。如图1和图2所示，中心管300穿过挡环430的挡环开口431和环形支撑面411的开口4110，挡环430的内侧与中心管300密封接触，挡环430的外侧与环形支撑座410的内壁密封接触，环形支撑座410的外侧被配置为与连接装置200的至少部分的内壁密封接触。本公开实施例提供的位于采油泵出油口的防喷装置，可以在该采油系统所在油井压力突增时，尽量防止高压液体从连接装置喷出，从而防止井喷事故的发生。
例如，通过挡环430的内侧与中心管300密封接触，挡环430的外侧与环形支撑座410的内壁密封接触，环形支撑座410的外侧与连接装置200的内壁密封接触，可以防止高压液体冲击防喷装置时，防喷装置相对连接装置发生位移以及防喷装置内部通过高压液体。
例如，如图2所示，环形支撑座410外侧设置有密封圈401以使得环形支撑座410的外侧与连接装置200的内壁密封接触。例如，如图2所示，环形支撑座410的环形支撑面411的外侧设置一圈凹槽以放置密封圈401。例如，挡环430的外侧设置有密封圈403以与环形支撑座410的内壁密封接触。例如，挡环430的外侧设置一圈凹槽以放置密封圈403。例如，挡环430的内侧设置有密封圈402以与中心管300密封接触。例如，挡环430的内侧设置一圈凹槽以放置密封圈402。例如，图2示意性的示出密封圈401的数量为一圈，密封圈402的数量为两圈，密封圈403的数量为两圈，但不限于此，各位置处的密封圈的数量可以根据产品需求进行设置。
例如，如图2所示，挡环430位于环形支撑座410的环形支撑面411面向采油泵100的一侧且与环形支撑面411之间设置有间隔，当井下压力突增，发生井喷时，高压液体瞬间冲击挡环，在高压冲击下，挡环向环形支撑面移动，即挡环向上移动以对环形支撑座的各开口以及开孔进行封堵，高压液体的压力越大封堵效果越好，从而防止井喷事故的发生。
例如，如图1至图3所示，挡环430的挡环开口431与环形支撑面411的开口4110正对以使中心管300可以穿过这两个开口。例如，环形支撑面411 的开口4110与中心管300之间可以是非密封接触，两者之间的空隙可以通过油。例如，环形支撑面411的开孔4111与贯穿该开孔4111的连接杆420之间可以是非密封接触，两者之间的空隙可以通过油。
例如，如图1至图5所示，采油泵100可以为无杆采油泵，例如可以为液压双作用无杆采油泵。液压双作用无杆采油泵可以利用地面动力泵把加压后的液压流，沿动力液传输管下至液压双作用无杆采油泵的进液管路，往复泵在液压流的作用下，把液压能转换成机械能，做上下往复运动，促使往复泵往复工作，从而由泵腔带动原油管路实现吸油举升。这种无杆采油泵没有泵杆，可以适应大斜度井或水平井，且可以杜绝偏磨或抽油杆往复运动而造成的掉杆等重大机械事故。
例如，如图1、图3以及图5所示，中心管300可以称为动力液传输管，被配置为传输增压后的动力液。例如，中心管300可以与采油泵100连接，动力液驱动采油泵100往复运动。例如，动力液可以包括水。
例如，如图1和图5所示，采油系统还包括外侧油管500，外侧油管500通过连接装置200与采油泵100连接。例如，如图4和图5所示，外侧油管500内被配置为插入中心油管602，中心管300被配置为连接中心油管602和采油泵100。例如，中心油管602与中心管300连通，中心油管602配置为将增压后的动力液通过中心管300传输至采油泵100。例如，中心油管602可以与过渡头603连接，从外侧油管500中间往地下安装。例如，中心管300被配置为插入过渡头603中以与中心油管602连通。
例如，如图1、图3和图5所示，采油泵100的外壳与连接法兰601连接，中心管300在连接法兰601内侧与采油泵100的中心孔连接，连接装置200与连接法兰601采用螺纹连接。本公开实施例不限于此，还可以采用其他连接方式。
例如，采油泵100与外侧油管500连接后，投入地下油层中。例如，采油泵100可以包括与外侧油管500连通的传输管路，以将从原油管路吸的油通过外侧油管500举升到地面。
例如，如图1至图3所示，连接装置200可以为连接管，防喷装置400位于连接管内。例如，如图1至图3所示，连接装置200包括第一连接管210和第二连接管220，第一连接管210位于第二连接管220远离采油泵100的一侧，第一连接管210的至少部分的内径小于第二连接管220的内径，环形支撑座410 的外侧被配置为与第一连接管210的上述至少部分内壁密封接触。
例如，如图1至图3所示，第一连接管210和第二连接管220彼此连接。例如，沿中心管300的延伸方向(如图中的Y方向)，第一连接管210的长度小于第二连接管220的长度。例如，防喷装置400位于第一连接管210中靠近第二连接管220的位置处。例如，防喷装置400全部位于第一连接管210中，或者防喷装置400的一部分位于第一连接管210中，防喷装置400的另一部分位于第二连接管220中。
例如，如图1至图3所示，沿中心管300的延伸方向，第一连接管210的长度大于防喷装置400的长度。
例如，如图1至图3所示，沿中心管300的延伸方向，第二连接管220的长度大于环形支撑座410的长度，且沿平行于第二连接管220的内径的方向(如图中的X方向，但不限于该方向，第二连接管220的内径的延伸方向可以为与Y方向垂直的任一方向)，第二连接管220的内径的长度大于环形支撑座410的尺寸(如外径或者宽度)。
采用本公开实施例提供的采油系统进行采油时，先将该采油系统(如图1所示的采油系统)投入地下油层中，然后将中心油管602(图4所示的中心油管602和过渡头603)通过外侧油管500(图1所示的外侧油管500)往地下安装，中心油管602插入图1所示的采油系统后的结构如图5所示。防喷装置400被配置为在中心油管602插入外侧油管500之前防止高压液体喷出；中心油管602在插入外侧油管500的过程中撞击防喷装置400以使防喷装置400脱离其与连接装置200密封接触的位置，如防喷装置400从与第一连接管210密封接触的位置脱离，防喷装置400从第一连接管210掉落到第二连接管220中后，中心油管602与中心管300连通，此后可以开始采油。
本公开实施例中，中心油管为采油系统以外的结构。
本公开实施例通过将防喷装置的长度设置为小于第二连接管的长度，且防喷装置的宽度小于第二连接管的内径，可以在防喷装置掉落在第二连接管内后影响采油系统的采油效果。
例如，如图1至图3所示，环形支撑座410的侧壁中位于环形支撑面411与采油泵100之间的部分包括至少一个侧壁开口412。例如，图2示意性的示出环形支撑座410的侧壁设置有三个侧壁开口412，但不限于此，还可以设置两个侧壁开口，还可以设置更多个侧壁开口，侧壁开口的数量可以根据产品需 求进行设置。例如，如图2所示，侧壁开口412的形状可以为圆形，但不限于此，还可以为椭圆形或其他形状，可以根据产品需求进行设置。
例如，如图2所示，沿连接杆420的延伸方向(即为中心管的延伸方向)，侧壁开口412的靠近环形支撑面411的边缘与环形支撑面411之间的最短距离小于挡环430的尺寸。例如，侧壁开口412的上端与环形支撑面411之间的最短距离小于挡环430的尺寸以使挡环430在被高压液体冲击到与环形支撑面411接触时，可以完全堵住侧壁开口412，防止高压液体通过侧壁开口412向上冲击。
例如，如图1和图2所示，挡环430位于与环形支撑面411之间距离最大位置处时，沿中心管300的延伸方向，侧壁开口412的靠近环形支撑面411的边缘与环形支撑面411之间的最短距离小于挡环430与环形支撑面411之间的间隔的尺寸。例如，在防喷装置400没有被高压液体冲击时，挡环430可以位于与环形支撑面411之间距离最大位置处，在高压液体冲击挡环430的过程中，挡环430向靠近环形支撑面411的方向移动，挡环430在移动过程中，挡环430与环形支撑面411之间间隔的尺寸逐渐减小，即挡环430与环形支撑面411之间的距离逐渐减小。例如，在挡环430与环形支撑面411之间的间隔尺寸最大时，挡环430没有完全遮挡侧壁开口412，油可以通过侧壁开口412流入环形支撑座410内。
例如，如图2所示，环形支撑座410设置有开口413，开口413位于环形支撑面411远离挡环430的一侧。例如，如图1至图3所示，中心管300可以穿过开口413。例如，开口413可以暴露连接杆420。例如，开口413可以暴露环形支撑面411。例如，环形支撑座410的侧壁围绕形成开口413。
在中心油管插入外侧油管且将防喷装置撞击脱离密封接触位置以后，防喷装置掉落到第二连接管内，环形支撑座的侧壁开口、环形支撑面与中心管之间的空隙、环形支撑面的开孔与连接杆之间的空隙以及环形支撑座的开口可以构成流通油的通道，以防止防喷装置在第二连接管中影响采油效果。
例如，如图2所示，每个连接杆420包括杆体421以及位于杆体421至少一侧的杆头422。例如，沿开孔4111的孔径的方向，杆头422的尺寸大于开孔4111的孔径，从而该杆头422可以卡在环形支撑面411上。例如，沿与杆体421的延伸方向(如图中的Y方向)相交的方向(如图中的X方向)，杆头422的尺寸大于杆体421的尺寸，杆体421一侧的杆头422位于环形支撑面411远 离挡环430的一侧。例如，沿X方向，杆体421一侧的杆头422的尺寸大于环形支撑面411设置的被杆体421贯穿的开孔的尺寸。
例如，如图2所示，连接杆420可以仅包括位于杆体421一侧的杆头422，该杆头422位于环形支撑面411远离挡环430的一侧，杆体421的另一侧采用螺纹与挡环430连接。但不限于此，例如，杆体421另一侧也可以设置杆头422，该杆头422位于挡环430远离环形支撑面411的一侧。例如，挡环430包括被杆体421贯穿的挡环开孔，该挡环开孔与相应的杆体421之间可以密封接触，以防止高压液体冲击挡环的过程中，部分液体从挡环开孔出射。
例如，如图2所示，杆体421一侧的杆头422可以固定在环形支撑面411上，在高压液体冲击挡环430时，挡环430可以沿杆体421向上移动。例如，连接杆420也可以没有固定在环形支撑面411上，而是固定在挡环430上，在高压液体冲击挡环430时，挡环430与连接杆420一起向上移动。
例如，如图1至图3所示，沿连接杆420的延伸方向，位于环形支撑面411面向采油泵100一侧的环形支撑座410的侧壁414的长度不小于位于环形支撑面411面向采油泵100一侧的连接杆420的长度。例如，连接杆420的底部不会超过环形支撑座410的底部，以使得在防喷装置落到第二连接管内时，环形支撑座起到支撑连接杆以及挡环的作用。
例如，如图2所示，环形支撑面411远离挡环430一侧的侧壁的长度可以小于环形支撑面411远离开口413一侧的侧壁414的长度。
本公开另一实施例提供一种防喷装置。图2为根据本公开另一实施例提供的防喷装置的截面结构示意图，本实施例提供的防喷装置可以应用于图1、图3至图5所示的采油系统。本实施例提供的防喷装置可以为图1、图3至图5所示的采油系统内的防喷装置。
如图2所示，防喷装置400包括环形支撑座410、挡环430以及多个连接杆420。环形支撑座410包括环形支撑面411，连接杆420和挡环430均位于环形支撑座410内。挡环430位于环形支撑面411的一侧且与环形支撑面411之间设置有间隔，挡环430的挡环开口431与环形支撑面411的开口4110正对，环形支撑面411包括被多个连接杆420贯穿的多个开孔4111，挡环430通过多个连接杆420与环形支撑面411连接；挡环430的外侧与环形支撑座410的内壁密封接触，挡环开口431内侧设置有第一密封圈402，环形支撑座410外侧设置有第二密封圈401。本公开实施例提供的防喷装置可以应用于采油系 统，以在采油系统所在油井压力突增时，尽量防止高压液体从连接装置喷出，从而防止井喷事故的发生。
例如，如图2所示，环形支撑座410外侧设置的第二密封圈401被配置为使得环形支撑座410的外侧与连接装置的内壁密封接触。例如，挡环430的外侧设置有密封圈403以与环形支撑座410的内壁密封接触。例如，挡环430的内侧设置的第一密封圈402被配置为与中心管300密封接触。通过挡环的内侧与中心管密封接触，挡环的外侧与环形支撑座的内壁密封接触，环形支撑座的外侧与连接装置的内壁密封接触，可以防止高压液体冲击防喷装置时，防喷装置相对连接装置发生位移以及防喷装置内部通过高压液体。
例如，如图2所示，以与Y方向的箭头所指的方向为向下，挡环430位于环形支撑座410下方且与环形支撑面411之间设置有间隔，当井下压力突增，发生井喷时，高压液体瞬间冲击挡环，在高压冲击下，挡环向环形支撑面移动，即挡环向上移动以对环形支撑座的各开口以及开孔进行封堵，高压液体的压力越大封堵效果越好，从而防止井喷事故的发生。
例如，如图2所示，位于环形支撑面411的设置有挡环430一侧的环形支撑座410的侧壁包括至少一个侧壁开口412。例如，图2示意性的示出环形支撑座410的侧壁设置有三个侧壁开口412，但不限于此，还可以设置两个侧壁开口，还可以设置更多个侧壁开口，侧壁开口的数量可以根据产品需求进行设置。例如，如图2所示，侧壁开口412的形状可以为圆形，但不限于此，还可以为椭圆形或其他形状，可以根据产品需求进行设置。
例如，如图2所示，沿连接杆420的延伸方向，侧壁开口412的靠近环形支撑面411的边缘与环形支撑面411之间的最短距离小于挡环430的尺寸。例如，侧壁开口412的上端与环形支撑面411之间的最短距离小于挡环430的尺寸以使挡环430在被高压液体冲击到与环形支撑面411接触时，可以完全堵住侧壁开口412，防止高压液体通过侧壁开口412向上冲击。
例如，如图2所示，挡环430位于与环形支撑面411之间距离最大位置处时，沿连接杆420的延伸方向，侧壁开口412的靠近环形支撑面411的边缘与环形支撑面411之间的最短距离小于挡环430与环形支撑面411之间的间隔的尺寸。例如，在防喷装置400没有被高压液体冲击时，挡环430可以位于与环形支撑面411之间距离最大位置处，在高压液体冲击挡环430的过程中，挡环430向靠近环形支撑面411的方向移动，挡环430在移动过程中，挡环430与 环形支撑面411之间间隔的尺寸逐渐减小，即挡环430与环形支撑面411之间的距离逐渐减小。例如，在挡环430与环形支撑面411之间的间隔尺寸最大时，挡环430没有完全遮挡侧壁开口412，油可以通过侧壁开口412流入环形支撑座410内。
例如，如图2所示，环形支撑座410设置有开口413，开口413位于环形支撑面411远离挡环430的一侧。例如，开口413可以暴露连接杆420。例如，开口413可以暴露环形支撑面411。例如，环形支撑座410的侧壁围绕形成开口413。
例如，如图2所示，每个连接杆420包括杆体421以及位于杆体421至少一侧的杆头422，沿与杆体421的延伸方向(如图中的Y方向)相交的方向(如图中的X方向)，杆头422的尺寸大于杆体421的尺寸，杆体421一侧的杆头422位于环形支撑面411远离挡环430的一侧。例如，沿X方向，杆体421一侧的杆头422的尺寸大于环形支撑面411设置的被杆体421贯穿的开孔的尺寸，从而该杆头422可以卡在环形支撑面411上。
例如，如图2所示，连接杆420可以仅包括位于杆体421一侧的杆头422，该杆头422位于环形支撑面411远离挡环430的一侧，杆体421的另一侧采用螺纹与挡环430连接。但不限于此，例如，杆体421另一侧也可以设置杆头422，该杆头422位于挡环430远离环形支撑面411的一侧。例如，挡环430包括被杆体421贯穿的挡环开孔，该挡环开孔与相应的杆体421之间可以密封接触，以防止高压液体冲击挡环的过程中，部分液体从挡环开孔出射。
例如，如图2所示，杆体421一侧的杆头422可以固定在环形支撑面411上，在高压液体冲击挡环430时，挡环430可以沿杆体421向上移动。例如，连接杆420也可以没有固定在环形支撑面411上，而是固定在挡环430上，在高压液体冲击挡环430时，挡环430与连接杆420一起向上移动。
例如，如图2所示，沿连接杆420的延伸方向，位于环形支撑面411远离开口413一侧的环形支撑座410的侧壁414的长度不小于位于环形支撑面411远离挡环430一侧的连接杆420的长度。例如，连接杆420的底部不会超过环形支撑座410的底部，以使得在防喷装置落到第二连接管内时，环形支撑座起到支撑连接杆以及挡环的作用。
例如，如图2所示，环形支撑面411远离挡环430一侧的侧壁的长度可以小于环形支撑面411远离开口413一侧的侧壁的长度。
本公开另一实施例提供一种采油系统的采油方法，参考图5，该采油方法包括：将采油系统投入地下油层中；将中心油管602通过采油系统的外侧油管500往地下安装，其中，外侧油管500通过连接装置200与采油泵100连接；防喷装置400被配置为在中心油管602插入外侧油管500之前防止高压液体喷出；中心油管602在插入外侧油管500的过程中撞击防喷装置400以使防喷装置400脱离其与连接装置200密封接触的位置，防喷装置400掉落后，中心油管602与中心管300连通。
采用本公开实施例提供的采油系统进行采油时，先将该采油系统(如图1所示的采油系统)投入地下油层中，然后将中心油管602(图4所示的中心油管602和过渡头603)通过外侧油管500(图1所示的外侧油管500)往地下安装，中心油管602插入图1所示的采油系统后的结构如图5所示。防喷装置400被配置为在中心油管602插入外侧油管500之前防止高压液体喷出；中心油管602在插入外侧油管500的过程中撞击防喷装置400以使防喷装置400脱离其与连接装置200密封接触的位置，如防喷装置400从与第一连接管210密封接触的位置脱离，防喷装置400从第一连接管210掉落到第二连接管220中后，中心油管602与中心管300连通，此后可以开始采油。
有以下几点需要说明：
(1)本公开的实施例附图中，只涉及到与本公开实施例涉及到的结构，其他结构可参考通常设计。
(2)在不冲突的情况下，本公开的同一实施例及不同实施例中的特征可以相互组合。
以上所述仅是本公开的示范性实施方式，而非用于限制本公开的保护范围，本公开的保护范围由所附的权利要求确定。

Claims (17)

  1. 一种采油系统，包括：
    采油泵；
    连接装置，与所述采油泵连接；
    中心管，与所述采油泵连接，且所述中心管的至少部分位于所述连接装置中；
    其中，所述采油系统还包括防喷装置，位于所述采油泵的出油口；
    所述防喷装置包括环形支撑座以及位于所述环形支撑座内的挡环和多个连接杆，所述挡环位于所述环形支撑座的环形支撑面面向所述采油泵的一侧且与所述环形支撑面之间设置有间隔，所述环形支撑面包括被多个所述连接杆贯穿的多个开孔，所述挡环通过多个所述连接杆与所述环形支撑面连接；
    所述中心管穿过所述挡环的挡环开口和所述环形支撑面的开口，所述挡环的内侧与所述中心管密封接触，所述挡环的外侧与所述环形支撑座的内壁密封接触，所述环形支撑座的外侧被配置为与所述连接装置的至少部分的内壁密封接触。
  2. 根据权利要求1所述的采油系统，其中，所述连接装置包括第一连接管和第二连接管，所述第一连接管位于所述第二连接管远离所述采油泵的一侧，所述第一连接管的至少部分的内径小于所述第二连接管的内径，所述环形支撑座的外侧被配置为与所述第一连接管的所述至少部分的内壁密封接触。
  3. 根据权利要求2所述的采油系统，其中，沿所述中心管的延伸方向，所述第二连接管的长度大于所述环形支撑座的长度，且沿平行于所述第二连接管内径的方向，所述第二连接管内径的长度大于环形支撑座的尺寸。
  4. 根据权利要求1-3任一项所述的采油系统，其中，所述环形支撑座的侧壁中位于所述环形支撑面与所述采油泵之间的部分包括至少一个侧壁开口。
  5. 根据权利要求4所述的采油系统，其中，所述挡环与所述环形支撑面之间的所述间隔尺寸最大时，沿所述中心管的延伸方向，所述侧壁开口的靠近所述环形支撑面的边缘与所述环形支撑面之间的最短距离小于所述挡环与所述环形支撑面之间的所述间隔的尺寸。
  6. 根据权利要求1-5任一项所述的采油系统，其中，所述环形支撑座设置有开口，所述开口位于所述环形支撑面远离所述挡环的一侧。
  7. 根据权利要求1-6任一项所述的采油系统，其中，每个连接杆包括杆体以及位于所述杆体的至少一侧的杆头，沿平行于所述开孔的孔径的方向，所述杆头的尺寸大于所述开孔的孔径，所述杆体一侧的杆头位于所述环形支撑面远离所述挡环的一侧。
  8. 根据权利要求1-7任一项所述的采油系统，其中，沿所述连接杆的延伸方向，位于所述环形支撑面面向所述采油泵一侧的所述环形支撑座的侧壁的长度不小于位于所述环形支撑面面向所述采油泵一侧的所述连接杆的长度。
  9. 根据权利要求1-8任一项所述的采油系统，还包括：
    外侧油管，所述外侧油管通过所述连接装置与所述采油泵连接。
  10. 根据权利要求1-9任一项所述的采油系统，其中，所述采油泵为无杆采油泵。
  11. 一种防喷装置，包括：
    环形支撑座，包括环形支撑面；
    多个连接杆，位于所述环形支撑座内；以及
    挡环，位于所述环形支撑座内；
    其中，所述挡环位于所述环形支撑面的一侧且与所述环形支撑面之间设置有间隔，所述挡环的挡环开口与所述环形支撑面的开口正对，所述环形支撑面包括被多个所述连接杆贯穿的多个开孔，所述挡环通过多个所述连接杆与所述环形支撑面连接；
    所述挡环的外侧与所述环形支撑座的内壁密封接触，所述挡环开口内侧设置有第一密封圈，所述环形支撑座外侧设置有第二密封圈。
  12. 根据权利要求11所述的防喷装置，其中，位于所述环形支撑面的设置有所述挡环一侧的所述环形支撑座的侧壁包括至少一个侧壁开口。
  13. 根据权利要求12所述的防喷装置，其中，所述挡环位于与所述环形支撑面距离最大位置处时，沿所述连接杆的延伸方向，所述侧壁开口的靠近所述环形支撑面的边缘与所述环形支撑面之间的最短距离小于所述间隔的尺寸。
  14. 根据权利要求11-13任一项所述的防喷装置，其中，所述环形支撑座设置有开口，所述开口位于所述环形支撑面远离所述挡环的一侧。
  15. 根据权利要求11-14任一项所述的防喷装置，其中，每个连接杆包括杆体以及位于所述杆体的至少一侧的杆头，沿平行于所述开孔的孔径的方向，所述杆头的尺寸大于所述开孔的孔径，所述杆体一侧的杆头位于所述环形支撑 面远离所述挡环的一侧。
  16. 根据权利要求14所述的防喷装置，其中，沿所述连接杆的延伸方向，位于所述环形支撑面远离所述开口一侧的所述环形支撑座的侧壁的长度不小于位于所述环形支撑面远离所述开口一侧的所述连接杆的长度。
  17. 一种使用权利要求1所述的采油系统的采油方法，包括：
    将所述采油系统投入地下油层中；
    将中心油管通过所述采油系统的外侧油管往地下安装，所述外侧油管通过所述连接装置与所述采油泵连接；
    其中，所述防喷装置被配置为在所述中心油管插入所述外侧油管之前防止高压液体喷出；
    所述中心油管在插入所述外侧油管的过程中撞击所述防喷装置以使所述防喷装置脱离其与所述连接装置密封接触的位置，所述防喷装置掉落后，所述中心油管与所述中心管连通。
PCT/CN2022/071058 2021-12-21 2022-01-10 采油系统、防喷装置以及采油方法 WO2023115663A1 (zh)

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