CN211666680U - Blowout preventer for rod-drive screw pump oil production system - Google Patents
Blowout preventer for rod-drive screw pump oil production system Download PDFInfo
- Publication number
- CN211666680U CN211666680U CN201922185881.XU CN201922185881U CN211666680U CN 211666680 U CN211666680 U CN 211666680U CN 201922185881 U CN201922185881 U CN 201922185881U CN 211666680 U CN211666680 U CN 211666680U
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- oil
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- sleeve
- upper joint
- screw pump
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 238000012856 packing Methods 0.000 claims abstract description 20
- 238000002347 injection Methods 0.000 claims abstract description 16
- 239000007924 injection Substances 0.000 claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 230000002265 prevention Effects 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 9
- 210000001503 joint Anatomy 0.000 claims description 7
- 239000003921 oil Substances 0.000 abstract description 79
- 239000007788 liquid Substances 0.000 abstract description 10
- 230000000740 bleeding effect Effects 0.000 abstract description 8
- 239000010720 hydraulic oil Substances 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000004044 response Effects 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 6
- 239000003292 glue Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to a blowout preventer for pole drives screw pump oil production system, its characterized in that: the upper joint, the upper cavity shell and the top sleeve are matched to form a hydraulic oil cavity, an axial oil injection channel is arranged in the upper joint, the top sleeve, the mandrel and the spring form an upper cavity reciprocating mechanism, and the sliding sleeve, the spring and the top sleeve form a lower cavity reciprocating mechanism; the reciprocating mechanisms of the upper chamber and the lower chamber are connected by a support rod; the radial oiling channel of the oil sleeve annular packing device unit is communicated with the axial oiling channel of the upper joint in a one-way mode, the air bleeder unit is composed of a plug, a valve core and a spring, an air bleeding hole is formed in the valve core, and the oiling channel of the air bleeder unit is communicated with the axial oiling channel of the upper joint. The utility model has the advantages of being scientific and reasonable in design, prevent spouting the linkage of unit, oil jacket annular space packer unit, air bleeder unit through the oil pipe inner chamber, can realize that the oil pipe inner chamber produces the quick shutoff of liquid passageway and oil jacket annular space, satisfy the safety requirement, convenient operation, the response is rapid, safe and reliable.
Description
Technical Field
The utility model belongs to the technical field of the oil field is retrieved, a screw pump oil recovery system in oil field is related to, in particular to is used for pole to drive screw pump oil recovery system's blowout preventer.
Background
Aiming at 'low-yield low-efficiency wells' such as heavy oil wells, sand wells, high-yield gas wells and the like, the screw pump oil production system has incomparable advantages compared with other oil production modes, particularly a rod-drive screw pump oil production mode, and has the advantages of low equipment cost, simple structure, small ground driving equipment volume, convenience in operation and no problems of unit insulation and motor heat dissipation of underground equipment. Due to the structural characteristics of the sucker rod, the accidents of breakage and sinking of the sucker rod occur for many times in actual production, and the liquid production channel needs to be closed and sealed rapidly under the condition, so that blowout and leakage of underground gas are avoided.
Although the ground driving device of the existing rod-drive screw pump oil production system is provided with a sealing device, the existing rod-drive screw pump oil production system has the following problems: 1. the pressure resistance value of the sealing device is low and is generally lower than 10 MPa; 2. if the sucker rod breaks or sinks at the sealing position, the sealing device at the wellhead will fail. A pumping rod of a certain platform screw pump of the Bohai sea oil field is broken at a well head position to cause sealing failure, blowout occurs to cause production accidents, and the accidents directly cause the shutdown of a rod-drive screw pump oil production mode in the offshore oil field.
Therefore, to solve the above drawbacks and problems, it is desirable to design a blowout preventer for a rod-drive screw pump oil production system.
Through a search for a patent publication, no patent publication similar to the present patent application is found.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's is not enough, provides a blowout preventer for pole drives screw pump oil recovery system, can realize that the oil pipe inner chamber produces the quick shutoff of liquid passageway and oil jacket annular space, satisfies the safety requirement of pole drive screw pump oil recovery system, convenient operation, and the response is rapid, safe and reliable.
The utility model provides a its technical problem realize through following technical scheme:
the utility model provides a blowout preventer for rod drive screw pump oil production system which characterized in that: the oil pipe inner cavity blowout prevention device comprises an oil pipe inner cavity blowout prevention unit, an oil sleeve annular packing device unit and an air bleeder unit, wherein the oil pipe inner cavity blowout prevention unit comprises an upper joint, an upper cavity shell, a middle joint, a lower cavity shell, a mandrel, a T-shaped rubber core, a top sleeve, a spring, a support rod and a sliding sleeve; the reciprocating mechanisms of the upper chamber and the lower chamber are connected by a support rod; the upper joint is provided with the oil sleeve annulus packing device unit, a radial oil injection channel of the oil sleeve annulus packing device unit is communicated with the axial oil injection channel of the upper joint in a one-way mode, the air bleeder unit is arranged on the upper joint and consists of a plug, a valve core and an air bleeder spring, an air bleeder hole is formed in the valve core, and the oil injection channel of the air bleeder unit is communicated with the axial oil injection channel of the upper joint.
And the two T-shaped rubber cores are respectively arranged in the upper cavity and the lower cavity, and the spacing distance between the two T-shaped rubber cores is 2000 mm.
Moreover, the surfaces of the upper joint, the middle joint, the top sleeve and the T-shaped rubber core are all set to be conical surfaces, so that conical surface sealing is realized.
And four uniformly distributed through holes are formed in the intermediate joint and are matched with the supporting rods to form a sliding friction pair.
The utility model discloses an advantage and beneficial effect do:
1. the utility model is used for pole drives screw pump oil recovery system's blowout preventer can annotate liquid or pressure release in ground through the liquid accuse pipeline, realizes that the liquid passageway is produced to the oil pipe inner chamber and the gas passageway is produced to the oil jacket annular space open fast or close convenient operation, safe and reliable satisfies the safety requirement of pole drives screw pump oil recovery system.
2. The utility model discloses a blowout preventer for pole drive screw pump oil production system puts upper and lower cavity and respectively is equipped with a T type and glues the core, and the spacing distance who glues the core is 2000mm, and two T types glue the core combined action, even the sucker rod takes place the optional position fracture in this design assurance, screw pump locating pin became invalid simultaneously and leads to the sucker rod to take place the phenomenon of sinking, has at least one T type to glue the core and can hold tightly with the sucker rod, and the liquid passageway of producing of oil pipe inner chamber also can be closed.
3. The utility model is used for rod drives screw pump oil recovery system's blowout preventer can not influence the implementation of other borehole operation, guarantees the efficiency of oil recovery operation.
Drawings
FIG. 1 is a schematic of a tubing string for a rod-drive progressive cavity pump production system;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a view from the direction A of FIG. 2;
FIG. 4 is an enlarged view of the structure of the air bleeder unit;
FIG. 5 is a schematic diagram of the operation of the present invention;
fig. 6 is a schematic diagram of the operation of the air bleeder unit.
Description of the reference numerals
1. The device comprises a casing, 2 parts of an oil pipe, 3 parts of a sucker rod, 4 parts of a blowout preventer, 5 parts of a screw pump, 6 parts of an anchor, 4-1 parts of an upper joint, 4-2 parts of an air bleeder unit, 4-2-1 parts of a plug, 4-2-2 parts of a valve core, 4-2-3 parts of an air bleeder spring, 4-3 parts of an oil sleeve annular packing device unit, 4-4 parts of a T-shaped rubber core, 4-5 parts of a top sleeve, 4-6 parts of a spring, 4-7 parts of a mandrel, 4-8 parts of an upper chamber shell, 4-9 parts of an intermediate joint, 4-10 parts of a support rod, 4-11 parts of a sliding sleeve, 4-12 parts of a lower joint.
Detailed Description
The present invention will be described in further detail with reference to specific examples, which are provided for illustrative purposes only, and are not intended to be limiting, and the scope of the present invention should not be limited thereby.
Referring to fig. 1, the pipe string includes an oil pipe 2, a blowout preventer 4, a screw pump 5, and an anchor 6 connected in sequence from top to bottom, and power of the ground driving device is transmitted to the screw pump 5 through a sucker rod 3.
When the screw pump works, well liquid is lifted to the ground through a space formed by the oil pipe and the sucker rod, downhole gas at the lower part of the blowout preventer enters an upper oil sleeve annulus through an air bleeder unit 4-2 of the blowout preventer and enters a ground flow through a ground wellhead, and the oil sleeve annulus is formed by the sleeve 1 and the oil pipe.
When the screw pump works normally, a well fluid circulation channel is established between the oil pipe and the sucker rod; an oil sleeve annulus packing device unit 4-3 of the blowout preventer seals the oil sleeve annulus, and downhole gas enters the upper oil sleeve annulus through an air bleeder unit of the blowout preventer; when the pump needs to be stopped or the sucker rod is broken, the channel between the oil pipe and the sucker rod is quickly closed, and meanwhile, the air bleeder unit on the blowout preventer is in a closed state to pack the underground gas below a packing position, so that the safety is ensured.
Referring to fig. 2, 3 and 4, a blowout preventer for a rod-drive screw pump oil production system is characterized in that: the oil pipe inner cavity blowout prevention device comprises an oil pipe inner cavity blowout prevention unit, an oil sleeve annular packing device unit and an air bleeder unit, wherein the oil pipe inner cavity blowout prevention unit comprises an upper joint 4-1, an upper cavity shell 4-8, a middle joint 4-9, a lower cavity shell 4-12, a mandrel 4-7, a T-shaped rubber core 4-4, a top sleeve 4-5, a spring 4-6, a support rod 4-10 and a sliding sleeve 4-11, the upper joint, the upper cavity shell and the top sleeve are matched to form a hydraulic oil cavity, an axial oil injection channel is arranged in the upper joint, the top sleeve, the mandrel and the spring form an upper cavity reciprocating mechanism, and the sliding sleeve, the spring and the top sleeve form a lower cavity reciprocating mechanism; the reciprocating mechanisms of the upper chamber and the lower chamber are connected by a support rod; the upper joint is provided with the oil sleeve annulus packing device unit, a radial oil injection channel of the oil sleeve annulus packing device unit is communicated with an axial oil injection channel of the upper joint in a one-way mode, the air bleeding device unit is arranged on the upper joint and consists of a plug 4-2-1, a valve core 4-2-2 and a bleeding spring 4-2-3, an air bleeding hole is formed in the valve core, and the oil injection channel of the air bleeding device unit is communicated with the axial oil injection channel of the upper joint.
When the liquid is injected and pressed, the top sleeves of the upper chamber and the lower chamber of the device overcome the resistance of the spring to move downwards, the T-shaped rubber core is opened, and the oil extraction channel is opened; the oil filling channel of the oil sleeve annulus packing device unit is opened, and the oil sleeve annulus packing device unit is pressed and expanded to realize the packing of the oil sleeve annulus; the valve core of the air bleeder unit overcomes the resistance of the spring and descends, the air bleeding hole of the valve core is communicated with the opening of the upper joint, and the air channel is opened;
when pressure is relieved, the spring pushes the top sleeve to move upwards, the T-shaped rubber cores of the upper and lower chambers are compressed and tightly embraced with the sucker rod, and a well fluid channel is closed; and a valve core of the air discharging device unit moves upwards under the action of an air discharging spring, and an air channel is closed.
The two T-shaped rubber cores are respectively arranged in the upper cavity and the lower cavity, and the spacing distance between the two T-shaped rubber cores is 2000 mm.
The surfaces of the upper joint, the middle joint, the top sleeve and the T-shaped rubber core are all set to be conical surfaces, so that conical surface sealing is realized.
Four evenly distributed through holes are arranged on the intermediate joint and are matched with the supporting rods to form a sliding friction pair.
The utility model discloses a theory of operation does:
referring to fig. 5 and 6, after a screw pump is lowered into a well, a hydraulic control pipeline connected with a liquid injection channel of an upper joint is extended to a well head, and is pressurized after being filled with hydraulic oil, an upper chamber top sleeve moves downwards under the action of the hydraulic oil pressure to overcome the resistance of a spring, the pressure applied to the upper chamber top sleeve is transmitted to a lower chamber top sleeve through a mandrel and a support rod, the lower chamber top sleeve also moves downwards under the action of the spring pressure of a lower chamber, the axial pressure applied to a T-shaped rubber core is gradually reduced along with the downwards movement of the top sleeve and generates radial movement, when the lower end face of a boss at the lower end of the mandrel is in contact with the upper end face of a step of an intermediate joint, the top sleeve stops moving, the T-shaped rubber core also; an oil injection channel of the oil sleeve annulus packing device unit is opened, and the oil sleeve annulus packing device unit is pressed and expanded to realize oil sleeve annulus packing; hydraulic oil enters the inner cavity of the air bleeder unit through the radial channel of the oil sleeve annular packing unit, the valve core overcomes the resistance of the air bleeder spring to move downwards, the valve core stops moving when the lower end surface of the valve core contacts with the bottom surface of the hole, at the moment, the air bleeding hole on the valve core is aligned with the open hole of the upper joint, and the air bleeding channel is opened.
During pressure relief, under the action of the restoring force of the spring, the top sleeve of the lower cavity drives the support rod, the mandrel and the top sleeve of the upper cavity to rapidly move upwards in the axial direction and generate axial compression on the T-shaped rubber core, the T-shaped rubber core generates radial movement while being compressed in the axial direction and finally locks with the transmission shaft, at the moment, the T-shaped rubber core, the upper joint, the middle joint and the top sleeve form conical surface sealing, and the well fluid channel of the inner cavity of the oil pipe is sealed and closed. The valve core in the air bleeder unit moves upwards in the axial direction under the action of the restoring force of the air bleeder spring, the air bleeder hole on the valve core is staggered with the open hole on the upper joint, and the air channel is closed.
Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims, and therefore, the scope of the present invention is not limited to the disclosure of the embodiments and the accompanying drawings.
Claims (4)
1. The utility model provides a blowout preventer for rod drive screw pump oil production system which characterized in that: the oil pipe inner cavity blowout prevention device comprises an oil pipe inner cavity blowout prevention unit, an oil sleeve annular packing device unit and an air bleeder unit, wherein the oil pipe inner cavity blowout prevention unit comprises an upper joint, an upper cavity shell, a middle joint, a lower cavity shell, a mandrel, a T-shaped rubber core, a top sleeve, a spring, a support rod and a sliding sleeve; the reciprocating mechanisms of the upper chamber and the lower chamber are connected by a support rod; the upper joint is provided with the oil sleeve annulus packing device unit, a radial oil injection channel of the oil sleeve annulus packing device unit is communicated with the axial oil injection channel of the upper joint in a one-way mode, the air bleeder unit is arranged on the upper joint and consists of a plug, a valve core and an air bleeder spring, an air bleeder hole is formed in the valve core, and the oil injection channel of the air bleeder unit is communicated with the axial oil injection channel of the upper joint.
2. The blowout preventer of claim 1, wherein the rod drive screw pump comprises: the two T-shaped rubber cores are respectively arranged in the upper cavity and the lower cavity, and the spacing distance between the two T-shaped rubber cores is 2000 mm.
3. The blowout preventer of claim 1, wherein the rod drive screw pump comprises: the surfaces of the upper joint, the middle joint, the top sleeve and the T-shaped rubber core are all set to be conical surfaces, so that conical surface sealing is realized.
4. The blowout preventer of claim 1, wherein the rod drive screw pump comprises: four uniformly distributed through holes are formed in the intermediate joint and are matched with the supporting rods to form a sliding friction pair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922185881.XU CN211666680U (en) | 2019-12-09 | 2019-12-09 | Blowout preventer for rod-drive screw pump oil production system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922185881.XU CN211666680U (en) | 2019-12-09 | 2019-12-09 | Blowout preventer for rod-drive screw pump oil production system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211666680U true CN211666680U (en) | 2020-10-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922185881.XU Expired - Fee Related CN211666680U (en) | 2019-12-09 | 2019-12-09 | Blowout preventer for rod-drive screw pump oil production system |
Country Status (1)
| Country | Link |
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| CN (1) | CN211666680U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110821438B (en) * | 2019-12-09 | 2024-04-05 | 天津轻工职业技术学院 | Blowout preventer for rod-driven screw pump oil extraction system |
-
2019
- 2019-12-09 CN CN201922185881.XU patent/CN211666680U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110821438B (en) * | 2019-12-09 | 2024-04-05 | 天津轻工职业技术学院 | Blowout preventer for rod-driven screw pump oil extraction system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201013 Termination date: 20201209 |