CN115012841B - Back pressure control device for petroleum exploitation wellhead - Google Patents
Back pressure control device for petroleum exploitation wellhead Download PDFInfo
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- CN115012841B CN115012841B CN202210748041.3A CN202210748041A CN115012841B CN 115012841 B CN115012841 B CN 115012841B CN 202210748041 A CN202210748041 A CN 202210748041A CN 115012841 B CN115012841 B CN 115012841B
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- 239000003208 petroleum Substances 0.000 title abstract description 12
- 210000001503 joint Anatomy 0.000 claims description 14
- 230000003014 reinforcing effect Effects 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 7
- 230000035515 penetration Effects 0.000 claims 1
- 238000009434 installation Methods 0.000 description 5
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000001914 filtration Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
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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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/10—Slips; Spiders ; Catching devices
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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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
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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
- E21B43/34—Arrangements for separating materials produced by the well
- E21B43/35—Arrangements for separating materials produced by the well specially adapted for separating solids
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a wellhead back pressure control device for petroleum exploitation, which comprises a limit pipe, a connecting pipe and a limit base, wherein the bottom of the limit pipe is provided with the limit base, the top of the limit pipe is provided with the connecting pipe, the top of the connecting pipe is provided with the connecting pipe, the bottom of the limit base is provided with a clamping seat, the periphery of the outer surface of the clamping seat is provided with a limit sleeve plate, the inside of the limit sleeve plate is connected with a positioning plate in a sliding manner, the front end of the bottom of the positioning plate is provided with a clamping plate, the bottom of the clamping seat is provided with a clamping ring, and the bottom of the clamping seat is provided with a stop ring. According to the invention, through the plug-in mounting of the connecting pipe, when the adjusting bolt is limited to rotate, the movement of the positioning clamp is pushed, so that the outer wall of the pipe orifice plugged by the connecting pipe is clamped and positioned, the mounting stability and convenience are increased, the mounting efficiency of the device is improved, and the setting of the stop ring has a limiting function on the movement of the positioning clamp.
Description
Technical Field
The invention relates to the technical field of back pressure control devices, in particular to a back pressure control device for an oil exploitation wellhead.
Background
In oil exploitation work, in order to fully control an open oil well, a plurality of auxiliary devices, such as a back pressure control device, are required to be used, but as the use requirement increases, the existing back pressure control device of an oil exploitation wellhead is difficult to meet the existing use requirement.
The defects of the wellhead back pressure control device for petroleum exploitation in the prior art are as follows:
1. when the existing oil exploitation wellhead back pressure control device is used, the existing oil exploitation wellhead back pressure control device is installed and used in a matched mode with an oil pipeline, and when the existing part of oil exploitation wellhead back pressure control device is used, an applicable installation structure is lacking, and therefore installation efficiency of the device is affected;
2. when the existing partial petroleum exploitation wellhead back pressure control device is used, an applicable back pressure control structure is lacking, oil outlet work of an oil pipeline is lacking, and a practical control structure is lacking, so that the practicability of the device is affected;
3. when the existing partial petroleum exploitation wellhead back pressure control device is used, a suitable stable supporting structure is lacked, the structural supportability of the device is insufficient, the device can be affected by oil transportation work, shaking of the device is caused, and therefore the actual usability of the device is affected.
Disclosure of Invention
The invention aims to provide a wellhead back pressure control device for petroleum exploitation, which aims to solve the problems in the background technology.
In order to achieve the above purpose, the invention provides a technical scheme that the oil exploitation wellhead back pressure control device comprises a limit pipe, a connecting pipe and a limit base, wherein the limit base is arranged at the bottom of the limit pipe, a connecting pipe is arranged at the top of the limit pipe, and the connecting pipe is arranged at the top of the connecting pipe;
the bottom of the limit base is provided with a clamping seat, the periphery of the outer surface of the clamping seat is provided with limit sleeve plates, the inside of the limit sleeve plates is connected with a positioning plate in a sliding manner, the front end of the bottom of the positioning plate is provided with a clamping plate, the bottom of the clamping seat is provided with a clamping ring, the bottom of the clamping seat is provided with a stop ring, the stop ring is positioned at the inner side of the clamping ring, the periphery of the outer surface of the clamping ring is connected with an adjusting bolt in a threaded manner, the front end of the adjusting bolt is provided with a positioning clamp, the inner wall of the clamping ring is provided with a plurality of telescopic rod assemblies, the front end of the telescopic rod assemblies is connected with the outer side of the positioning clamp, the bottom of the clamping seat is provided with a butt joint pipe, the outer surface of the butt joint pipe is provided with a pressing rod assembly, the top of the butt joint pipe is provided with a limit bin, the inner wall of the limit bin is internally provided with a fixing seat, the front end and the tail end of the limit bin are respectively, the front end of the fixing seat is provided with a positioning rod, the front end of the fixing seat is provided with a reinforcing rod, the tail end of the fixing seat is provided with a piston control rod, the inner wall of the butt joint pipe is provided with a piston pipe, the piston pipe is internally provided with a rotary shaft, the piston pipe is connected with the piston pipe is internally provided with the piston pipe, the butt joint assembly, the piston pipe is provided with the piston pipe and the piston pipe, the inner wall of the reinforcing pipe is embedded with a soft rubber pad.
Preferably, the periphery of the outer surface of the reinforcement pipe is provided with a connecting rod, and the front end of the connecting rod is provided with a rotating ring.
Preferably, the backup pad is all installed to the both sides of spacing base surface, the spacing lead screw of backup pad top front end installation, the surface threaded connection of spacing lead screw has limit sleeve, the pyramid pole is installed to limit sleeve's bottom, spacing pyramid is installed to the bottom of pyramid pole, the engagement handle is all installed around the limit sleeve surface.
Preferably, the bearing rods are arranged around the outer surface of the connecting pipe, the bottoms of the bearing rods are connected to the top of the limiting sleeve plate, limiting springs are arranged on the inner wall of the limiting sleeve plate, and the front ends of the limiting springs are connected to the tail ends of the positioning plates.
Preferably, the outer surface threaded connection of screwed pipe has the linking sleeve pipe, the output tube is installed to linking sleeve pipe's front end.
Preferably, the outer surface of the output pipe is provided with a power supply assembly, the inner wall of the output pipe is provided with a solenoid valve assembly, and the power supply assembly is electrically connected with the solenoid valve assembly.
Preferably, the inside of pressing the pole subassembly is provided with presses the spring, the front end of pressing the pole subassembly is provided with the slope splint, screen assembly is installed to the inner wall of joint seat.
Preferably, the drainage piece is installed to the inner wall of joint seat, the filter is installed to the inner wall of spacing pipe, the inner wall of filter is provided with spacing rack.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, through the plug-in mounting of the connecting pipe, when the adjusting bolt is limited to rotate, the movement of the positioning clamp is pushed, so that the outer wall of the pipe orifice plugged by the connecting pipe is clamped and positioned, the mounting stability and convenience are increased, the mounting efficiency of the device is improved, and the setting of the stop ring has a limiting function on the movement of the positioning clamp.
2. According to the invention, the oil transportation work of the device is controlled under the driving action of the power supply component through the backflow prevention action of the limiting shifting piece and the arrangement of the electromagnetic valve component, and the device is matched with the mobility of the backflow lever to play a certain backflow control role in the use of the device.
3. According to the invention, the limit sleeve is limited to rotate, so that the limit pyramid is pushed to be pricked into the ground, the bottom supporting function of the device during installation and use is added, the stability of the device during use is added, and the stability of structural connection of the device is added through the arrangement of the bearing rod, so that the stable usability of the whole device during use is added.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic cross-sectional view of a stop collar plate according to the present invention;
FIG. 3 is a schematic cross-sectional view of a stop collar of the present invention;
FIG. 4 is a schematic cross-sectional view of the back pressure pipe structure of the present invention;
FIG. 5 is a schematic cross-sectional view of a splice sleeve of the present invention;
FIG. 6 is a schematic cross-sectional view of a retaining ring according to the present invention;
FIG. 7 is a schematic cross-sectional view of a spacing tube according to the present invention;
FIG. 8 is a schematic cross-sectional view of a restrictor of the present invention.
In the figure: 1. a limiting tube; 2. a connecting pipe; 3. a limit base; 4. a connecting pipe; 5. a clamping seat; 6. a limiting sleeve plate; 7. a positioning plate; 8. a clamping plate; 9. a clamping ring; 10. a stop ring; 11. an adjusting bolt; 12. a positioning clamp; 13. a telescoping rod assembly; 14. a butt joint pipe; 15. a pressing rod assembly; 16. a back pressure pipe; 17. a flow-limiting seat; 18. a limit bin; 19. a fixing seat; 20. a positioning rod; 21. reinforcing the pipe; 22. a return pressure lever; 23. a piston assembly; 24. a limit handle; 25. a control tube; 26. a limiting rotating shaft; 27. limiting poking piece; 28. a threaded tube; 29. a flow-limiting sheet; 30. a soft rubber pad; 31. a connecting rod; 32. a rotating ring; 33. a support plate; 34. a limit screw rod; 35. a limit sleeve; 36. a pyramid bar; 37. limit pyramid; 38. a connecting handle; 39. a load-bearing rod; 40. a limit spring; 41. a connecting sleeve; 42. an output pipe; 43. a power supply assembly; 44. a solenoid valve assembly; 45. pressing the spring; 46. an inclined clamping plate; 47. a screen assembly; 48. a drainage sheet; 49. a filter plate; 50. spacing rack.
Detailed Description
Referring to fig. 1, fig. 2, fig. 4, fig. 5, fig. 6, fig. 7 and fig. 8, a wellhead back pressure control device for petroleum exploitation;
comprises a limit pipe 1, a connecting pipe 2 and a limit base 3, wherein the limit base 3 is arranged at the bottom of the limit pipe 1, the connecting pipe 4 is arranged at the top of the limit pipe 1, the connecting pipe 2 is arranged at the top of the connecting pipe 4, a clamping seat 5 is arranged at the bottom of the limit base 3, limit sleeve plates 6 are arranged around the outer surface of the clamping seat 5, a positioning plate 7 is connected inside the limit sleeve plates 6 in a sliding manner, a clamping plate 8 is arranged at the front end of the bottom of the positioning plate 7, a limit spring 40 is arranged on the inner wall of the limit sleeve plates 6, the front end of the limit spring 40 is connected to the tail end of the positioning plate 7, the limit sleeve plates 6 are internally provided with limit springs 40, so that the limit activity of the positioning plate 7 and the clamping plate 8 is increased, the clamping seat of the clamping plate 8 is increased, then when the device is used, the clamping performance of the clamping plate 8 can be used for clamping the protection pipeline outside a part of petroleum pipeline, the clamping device has certain selective usability, thereby adding the applicability of the device in mounting and using, the clamping ring 9 is arranged at the bottom of the clamping seat 5, the stop ring 10 is positioned at the inner side of the clamping ring 9, the periphery of the outer surface of the clamping ring 9 is connected with the adjusting bolt 11 in a threaded penetrating way, the front end of the adjusting bolt 11 is provided with the locating clamp 12, the inner wall of the clamping ring 9 is provided with the plurality of telescopic rod assemblies 13, the front end of the telescopic rod assemblies 13 is connected with the outer side of the locating clamp 12, the bottom of the clamping seat 5 is provided with the butt joint pipe 14, the butt joint pipe 14 is inserted and installed, when the limiting rotation of the adjusting bolt 11 is carried out, the movement of the locating clamp 12 is pushed, the outer wall of the pipe orifice inserted by the butt joint pipe 14 is clamped and located, and the mounting stability and convenience are added, the outer surface of the butt joint pipe 14 is embedded and provided with a pressing rod assembly 15, the inside of the pressing rod assembly 15 is provided with a pressing spring 45, the front end of the pressing rod assembly 15 is provided with an inclined clamping plate 46, the inner wall of the clamping seat 5 is provided with a screen assembly 47, the inner wall of the clamping seat 5 is provided with a drainage sheet 48, the inner wall of the limiting pipe 1 is provided with a filter plate 49, the inner wall of the filter plate 49 is provided with a limiting net rack 50, and when petroleum enters the device at the bottom of the sleeve clamping seat 5, the screen assembly 47 can play a role in primary filtration, and through the arrangement of the filter plate 49 and the limiting net rack 50, the petroleum can be subjected to a secondary filtration, and then the doped large particle sundries therein are subjected to a blocking effect, and then the high-efficiency circulation inside the device is maintained;
the back pressure pipe 16 is arranged at the top of the connecting pipe 2, the current-limiting seat 17 is arranged at the top of the back pressure pipe 16, the limit bin 18 is arranged in the current-limiting seat 17, the front end and the tail end of the inner wall of the limit bin 18 are respectively provided with a fixed seat 19, the front end of the fixed seat 19 is provided with a positioning rod 20, the top of the current-limiting seat 17 is embedded with a reinforcing pipe 21, the back pressure rod 22 is inserted in the reinforcing pipe 21, the bottom of the back pressure rod 22 is provided with a piston assembly 23, the outer surface of the piston assembly 23 is slidably connected in the back pressure pipe 16, the periphery of the outer surface of the back pressure rod 22 is provided with a limit handle 24, the front end and the tail end of the current-limiting seat 17 are respectively provided with a control pipe 25, the front end of the fixed seat 19 is connected with the inner wall of the control pipe 25, the top and the bottom of the inner wall of the control pipe 25 are respectively provided with a limit rotating shaft 26, the outer surface of the limit rotating shaft 26 is provided with a limit pulling piece 27, the front end of the control pipe 25 is provided with a threaded pipe 28, the external surface of the threaded pipe 28 is connected with a connecting sleeve 41 in a threaded manner, the control pipe 25 is internally provided with a limiting rotating shaft 26 and a limiting poking piece 27, the setting of a positioning rod 20 on a fixed seat 19 plays a limiting role in the rotating direction of the limiting poking piece 27, and then plays a role in preventing backflow, and the setting of a limiting piece 29 in the threaded pipe 28 plays a certain role in limiting oil outflow, after the connecting sleeve 41 on the threaded pipe 28 is installed and connected with the threaded pipe 28 in a threaded manner, the connecting sleeve 41 can be connected and fixed with the threaded pipe 28 through bolts, the front end of the connecting sleeve 41 is provided with an output pipe 42, the external surface of the output pipe 42 is provided with a power supply component 43, the inner wall of the output pipe 42 is provided with an electromagnetic valve component 44, the power supply component 43 is electrically connected with the electromagnetic valve component 44, the limiting piece 29 is installed on the inner wall of the threaded pipe 28, the soft rubber pad 30 is embedded and installed on the inner wall of the reinforcing pipe 21, the connecting rods 31 are installed on the periphery of the outer surface of the reinforcing pipe 21, the rotating ring 32 is installed at the front end of the connecting rods 31, and the arrangement of the connecting rods 31 and the rotating ring 32 plays a role in auxiliary support, so that a proper hand position is provided for a user when the device is used, and the humanized usability of the device is improved;
referring to fig. 1, 3 and 7, a wellhead back pressure control device for petroleum exploitation;
the backup pad 33 is all installed to both sides of spacing base 3 surface, backup pad 33 top front end installation spacing lead screw 34, the surface threaded connection of spacing lead screw 34 has stop collar 35, pyramid pole 36 is installed to stop collar 35's bottom, spacing pyramid 37 is installed to pyramid pole 36's bottom, link up handle 38 is all installed around the stop collar 35 surface, bearing bar 39 is all installed around connecting pipe 4 surface, and the bottom of bearing bar 39 is connected in the top of limit sleeve board 6, to spacing pivoted spacing rotation of stop collar 35, promote spacing pyramid 37, and make spacing pyramid 37 prick ground, then add the bottom supporting role when the device is installed and use, then add the stability when the device is used, and through the setting of bearing bar 39, thereby add the stability of device structural connection.
The working principle is that through the arrangement of the clamping seat 5, the clamping ring 9 and the butt joint pipe 14, the device can be used for plugging the butt joint pipe 14 with an oil outlet on an oil pipeline in use, and through the arrangement of the inclined clamping plate 46 and the pressing rod assembly 15, the pressing spring 45 is arranged in the pressing rod assembly 15, so that the limiting rebound resilience of the pressing rod assembly 15 is increased, then after the butt joint pipe 14 is plugged, the inclined clamping plate 46 can play a role of extruding and clamping the inside of an oil outlet pipe orifice through the limiting rebound resilience of the pressing rod assembly 15, and the applicability of the clamping of the inclined clamping plate 46 of the device is increased through the telescopic activity of the pressing rod assembly 15, so that the device is suitable for plugging the pipe orifices with different thicknesses in a certain range, the clamping ring 9 can be used for limiting rotation of the adjusting bolt 11, and under the auxiliary effect of the telescopic performance of the telescopic rod assembly 13, the positioning clamp 12 is limited, through the arrangement of the back pressure pipe 16 and the current limiting seat 17, after the bottom of the device is installed and connected, the back pressure rod 22 can be pumped up and down through the limit handle 24, the movable tightness of the back pressure rod 22 can be increased through the arrangement of the soft rubber pad 30 in the reinforcing pipe 21, the piston assembly 23 is driven to limit the back pressure pipe 16 through the back and forth pumping of the back pressure rod 22, then the oil delivery pipe orifice clamped at the bottom of the clamping seat 5 is subjected to back pressure through the connecting pipe 2, the connecting pipe 4 and the limit pipe 1, so that oil flows into the limit bin 18 through the clamping seat 5, the connecting pipe 2, the connecting pipe 4 and the limit pipe 1 all the way and flows into the control pipe 25, through the arrangement of the limit base 3 and the support plate 33, the device can rotate through the connecting handle 38 on the support plate 33 during use, thereby drive spacing sleeve 35 spacing rotation on spacing lead screw 34, then play the effect of lift adjustment to spacing sleeve 35's height, then play lift adjustment to pyramid pole 36 and spacing pyramid 37.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. The utility model provides an oil development well head back pressure controlling means, includes spacing pipe (1), links up pipe (2) and spacing base (3), its characterized in that: a limiting base (3) is arranged at the bottom of the limiting pipe (1), a connecting pipe (4) is arranged at the top of the limiting pipe (1), and a connecting pipe (2) is arranged at the top of the connecting pipe (4);
the utility model discloses a limiting device, including limiting base (3), clamping base (5), limiting sleeve plate (6) are all installed around clamping base (5) surface, locating plate (7) are installed to the inside sliding connection of limiting sleeve plate (6), grip block (8) are installed to the front end of locating plate (7) bottom, clamping ring (9) are installed to the bottom of clamping base (5), blocking ring (10) are installed to the bottom of clamping base (5), and blocking ring (10) are located the inboard of clamping ring (9), all screw thread penetration connection has adjusting bolt (11) around clamping ring (9) surface, locating clip (12) are installed to the front end of adjusting bolt (11), the inner wall of clamping ring (9) installs a plurality of telescopic link assembly (13), and the front end of telescopic link assembly (13) is connected in the outside of locating clip (12), install pair (14) in the bottom of clamping base (5), pressing rod (15) are installed to the outer surface gomphosis of butt joint pipe (14), pressing rod assembly (16) are installed to the surface gomphosis, top (16) are installed to top (16) and are pressed limit the top (17), the front end and the tail end of the inner wall of the limit bin (18) are respectively provided with a fixed seat (19), the front end of the fixed seat (19) is provided with a positioning rod (20), the top of the current-limiting seat (17) is embedded with a reinforcing pipe (21), the inside of the reinforcing pipe (21) is inserted with a back pressure rod (22), the bottom of the back pressure rod (22) is provided with a piston assembly (23), the outer surface of the piston assembly (23) is slidably connected with the inside of the back pressure pipe (16), the periphery of the outer surface of the back pressure rod (22) is provided with limit handles (24), control tube (25) are all installed to front end and the tail end of current-limiting seat (17), and the front end of fixing base (19) is connected in the inner wall of control tube (25), the top and the bottom of control tube (25) inner wall all are provided with spacing pivot (26), the surface of spacing pivot (26) is provided with spacing plectrum (27), screwed pipe (28) are installed to the front end of control tube (25), current-limiting piece (29) are installed to the inner wall of screwed pipe (28), soft rubber pad (30) are installed in the inner wall gomphosis of reinforcement pipe (21).
2. The oil production wellhead back pressure control device of claim 1, wherein: the periphery of the outer surface of the reinforcement pipe (21) is provided with a connecting rod (31), and the front end of the connecting rod (31) is provided with a rotating ring (32).
3. The oil production wellhead back pressure control device of claim 1, wherein: the utility model discloses a spacing base, including spacing base (3) and support plate (33), backup pad (33) both sides of surface are all installed, spacing lead screw (34) are installed to backup pad (33) top front end, the surface threaded connection of spacing lead screw (34) has spacing sleeve pipe (35), pyramid pole (36) are installed to the bottom of spacing sleeve pipe (35), spacing pyramid (37) are installed to the bottom of pyramid pole (36), link up handle (38) are all installed around spacing sleeve pipe (35) surface.
4. The oil production wellhead back pressure control device of claim 1, wherein: the bearing rods (39) are arranged around the outer surface of the connecting pipe (4), the bottoms of the bearing rods (39) are connected to the top of the limiting sleeve plate (6), limiting springs (40) are arranged on the inner wall of the limiting sleeve plate (6), and the front ends of the limiting springs (40) are connected to the tail ends of the positioning plates (7).
5. The oil production wellhead back pressure control device of claim 2, wherein: the outer surface of the threaded pipe (28) is in threaded connection with a connecting sleeve (41), and an output pipe (42) is arranged at the front end of the connecting sleeve (41).
6. The oil production wellhead back pressure control device of claim 5, wherein: the outer surface of the output pipe (42) is provided with a power supply assembly (43), the inner wall of the output pipe (42) is provided with a solenoid valve assembly (44), and the power supply assembly (43) is electrically connected with the solenoid valve assembly (44).
7. The oil production wellhead back pressure control device of claim 1, wherein: the inside of pressing rod subassembly (15) is provided with presses spring (45), the front end of pressing rod subassembly (15) is provided with inclined clamping plate (46), screen assembly (47) are installed to the inner wall of cassette (5).
8. The oil production wellhead back pressure control device of claim 1, wherein: the inner wall of joint seat (5) is installed drainage piece (48), filter (49) are installed to the inner wall of spacing pipe (1), the inner wall of filter (49) is provided with spacing rack (50).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210748041.3A CN115012841B (en) | 2022-06-29 | 2022-06-29 | Back pressure control device for petroleum exploitation wellhead |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210748041.3A CN115012841B (en) | 2022-06-29 | 2022-06-29 | Back pressure control device for petroleum exploitation wellhead |
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| CN115012841A CN115012841A (en) | 2022-09-06 |
| CN115012841B true CN115012841B (en) | 2023-06-30 |
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|---|---|
| CN115012841A (en) | 2022-09-06 |
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Effective date of registration: 20230627 Address after: Room 201, Shop 6, 319 Yizhou Road, Dongying Development Zone, Shandong 257000 Patentee after: Shandong Longxiao Petroleum Equipment Co.,Ltd. Address before: 588 Yunhe Road, development zone, Dongying City, Shandong Province Patentee before: SHANDONG LONGXING PETROLEUM EQUIPMENT Co.,Ltd. |