CN110513070B - Flap type downhole oil pipe hydraulic control blowout preventer - Google Patents
Flap type downhole oil pipe hydraulic control blowout preventer Download PDFInfo
- Publication number
- CN110513070B CN110513070B CN201910923902.5A CN201910923902A CN110513070B CN 110513070 B CN110513070 B CN 110513070B CN 201910923902 A CN201910923902 A CN 201910923902A CN 110513070 B CN110513070 B CN 110513070B
- Authority
- CN
- China
- Prior art keywords
- hole
- outer sleeve
- turning plate
- upper joint
- top connection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000003825 pressing Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 9
- 239000010779 crude oil Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Pipe Accessories (AREA)
- Earth Drilling (AREA)
Abstract
A turning plate type underground oil pipe hydraulic control blowout preventer comprises an upper joint, an outer sleeve and a lower joint, wherein an upper joint eccentric hole is formed in the pipe wall on one side of the upper joint, a spring and a pressing pin shaft are installed in the upper joint eccentric hole, a copper ring is installed in tight fit with the inner periphery of the lower end of a central hole on the upper joint, a positioning device is installed at the lower end of an inner hole of the upper joint, a positioning pin shaft is installed in a hole of the positioning device, and the positioning pin shaft simultaneously penetrates through a hole on a turning plate; the pipe wall at one side of the outer sleeve is provided with an eccentric hole with the outer sleeve, a return plunger is arranged in the hole, and sealing rings are respectively arranged at the upper part and the lower part of the return plunger; the outer sleeve is provided with a constant pressure shear pin through threads, and the front end of the constant pressure shear pin is inserted into a hole arranged in the middle of the return plunger. The invention has the advantages that: in the process of tripping the pipe column, the channel is closed, well liquid cannot gush from the inside of the pipe column to the ground, pollution caused by the well liquid is avoided on the secondary side, and in a normal working state, the channel is opened, so that normal production can be guaranteed.
Description
Technical Field
The invention relates to a flap type downhole oil pipe hydraulic control blowout preventer and a blowout prevention method based on the same, relates to the technical field of oilfield application, and belongs to a device for preventing well fluid from being ejected from a pipe column in the process of tripping the pipe column in oilfield production operation.
Background
At present, a tubular column formed by connecting oil pipes in series needs to be lowered to the bottom of a well before normal production operation of an oil pumping well, an oil pump and other downhole tools are installed below the tubular column, an inner hole of the tubular column is a channel for reciprocating motion of the tubular column up and down, and meanwhile, the inner hole of the tubular column is a channel for discharging well fluid, and the inner hole is required to be unobstructed in the working process. When the well is repaired, the rod column is lifted out of the pipe column, and then the pipe column is lifted out of the well, so that the oil well pump can be lifted out of the ground for maintenance, and the pipe column lifting operation is needed when the well is needed and before normal production.
The underground stratum pressure is high or low, and for some low-pressure wells, the liquid level in the well is far lower than that of the well mouth, so that crude oil in the pipe column needs to be discharged underground in the process of lifting the pipe column, and pollution caused by bringing the crude oil to the ground is prevented. For some high-pressure wells, the pressure in the well continuously lifts the well liquid to be sprayed out of the wellhead, so that the well liquid in the well can be continuously sprayed out of the ground from the inside of the pipe column in the pipe column lifting process, the ground pollution can be caused, and a plurality of potential safety hazards exist.
The inner hole of the pipe column is required to be closed when the pipe column is lowered into the well, the pipe column is required to be completely opened to ensure smoothness in the working process, and then the pipe column is plugged again before the pipe column is lifted up in the well repairing operation. The device with the three functions can complete the work.
The prior art can not well complete the whole operation process, and a plurality of devices can only complete a single well-descending closing action, and the inner hole of the pipe column can not be closed when the pipe column is lifted, so that well liquid is often sprayed out of the ground, and serious pollution and potential safety hazard are caused.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a flap type downhole oil pipe hydraulic control blowout preventer which can be arranged at any position of a pipe column above an oil pump.
The technical scheme of the invention is as follows: the utility model provides a board-like oil pipe liquid accuse blowout preventer in pit, including top connection, overcoat and lower clutch, the both ends of overcoat are connected with top connection and lower clutch through the screw thread respectively, be equipped with O type sealing washer between this top connection and overcoat and between overcoat and the lower clutch respectively, characterized in that is equipped with the eccentric hole of top connection on the pipe wall of this top connection one side, install spring and compression pin axle in this top connection eccentric hole, the copper ring is installed to the tight fit in the centre bore lower extreme inner periphery on this top connection, install positioner through the welding in this top connection hole lower extreme, positioner's downthehole install the locating pin axle, the locating pin axle passes the hole on the board simultaneously; a pipe wall at one side of the outer sleeve is provided with an outer sleeve eccentric hole corresponding to the upper joint eccentric hole, a return plunger is arranged in the outer sleeve eccentric hole, and an upper O-shaped sealing ring and a lower O-shaped sealing ring are respectively arranged at the upper part and the lower part of the return plunger; a constant pressure shear pin is arranged on the outer sleeve through threads, and the front end of the constant pressure shear pin) is inserted into a hole arranged in the middle of the return plunger.
The invention has the advantages that: in the process of tripping the pipe column, the channel is closed, well liquid cannot gush from the inside of the pipe column to the ground, pollution caused by the well liquid is avoided on the secondary side, and in a normal working state, the channel is opened, so that normal production can be guaranteed.
Drawings
FIG. 1 is a schematic diagram of the main structure of the present invention;
FIG. 2 is an enlarged view at A in FIG. 1;
FIG. 3 is a reference view of the use of FIG. 1 in the down hole;
fig. 4 is an enlarged view at B in fig. 3;
FIG. 5 is a state reference diagram of the normal operation of FIG. 1;
FIG. 6 is an enlarged view at C in FIG. 5;
FIG. 7 is a reference view of the condition of the riser string of FIG. 1;
fig. 8 is an enlarged view at D in fig. 7.
Detailed Description
The invention will be further described with reference to specific embodiments, and advantages and features of the invention will become apparent from the description. These examples are merely exemplary and do not limit the scope of the invention in any way. It will be understood by those skilled in the art that various changes and substitutions of details and forms of the technical solution of the present invention may be made without departing from the spirit and scope of the present invention, but these changes and substitutions fall within the scope of the present invention.
Referring to fig. 1-8, the invention relates to a turning plate type downhole oil pipe hydraulic control blowout preventer, which comprises an upper joint 1, an O-shaped sealing ring 2, a jacket 3, a spring 4, a compression pin 5, a copper ring 6, a positioning device 7, a positioning pin 8, a turning plate 9, a return plunger 10, an O-shaped sealing ring 11, a constant pressure shear pin 12, an O-shaped sealing ring 13, a lower joint 14 and an O-shaped sealing ring 15, wherein the O-shaped sealing ring 2 is arranged on the outer diameter of the upper joint 1, the upper joint 1 is connected with the jacket 3 through threads, the upper joint 1 and the jacket 3 are sealed through the O-shaped sealing ring 2, an upper joint eccentric hole is arranged on the pipe wall at one side of the upper joint 1, the spring 4 and the compression pin 5 are arranged in the upper joint eccentric hole, the positioning device 7 is arranged at the lower end of an inner hole of the upper joint 1 through welding (the inner and outer contours of the positioning device 7 correspond to the contours of the lower end face of the upper joint 1), the positioning pin 8 is arranged in the hole of the positioning device 7, the positioning pin 8 simultaneously penetrates through the hole on the turning plate 9, and the turning plate 9 is positioned on the positioning pin 8 by the positioning pin 8; the pipe wall on one side of the outer sleeve 3 is provided with an outer sleeve eccentric hole corresponding to the upper joint eccentric hole, a return plunger 10 is arranged in the outer sleeve eccentric hole, an upper O-shaped sealing ring 11 and a lower O-shaped sealing ring 13 are respectively arranged on the upper part and the lower part of the return plunger 10, a constant pressure shear pin 12 is arranged on the outer sleeve 3 through threads, the front end of the constant pressure shear pin 12 extends into a hole (the hole is positioned between the upper O-shaped sealing ring 11 and the lower O-shaped sealing ring 13) on the return plunger 10, a lower joint 14 is connected below the outer sleeve 3 through threads, and an O-shaped sealing ring 15 is arranged on the lower joint 14.
The spring 4 pushes the compression pin shaft 5 to press on the turning plate 9, and a cam sharp angle TLJJ is arranged at the position of the turning plate 9 where the positioning pin shaft 8 is arranged.
The turning plate 9 can rotate around the positioning pin shaft 8, the turning plate 9 is tightly attached to the copper ring 6 on the upper joint 1 when rotating to the horizontal position, and the turning plate 9 completely leaves a channel of an inner hole of the copper ring 6 to be attached to the inner wall of the outer sleeve 3 when rotating to the vertical position.
The working principle of the invention is as follows: as shown in fig. 3 and 4, in the process of going into the well, the turning plate 9 is in a horizontal position and is tightly attached to the copper ring 6 on the upper joint 1, the spring 4 pushes the compression pin shaft 5 to press on the cam sharp corner TLJJ of the turning plate 9, the positioning pin shaft 8 is used as a fulcrum to generate lever force, the turning plate 9 is ensured to stay at the horizontal position, well liquid is sealed below the turning plate 9, at the moment, the turning plate 9 is tightly attached to the copper ring 6 under the action of well hydraulic pressure, and the well liquid is prevented from being sprayed upwards.
As shown in fig. 5 and 6, when the device needs to work normally, the lower pole GZ contacts the turning plate 9, under the action of gravity of the pole GZ, the turning plate 9 is pushed open, the turning plate 9 returns to the vertical position and is attached to the inner wall of the outer sleeve 3, the channel is opened, the device can work normally, the spring 4 pushes the compression pin 5 to press on the cam sharp corner TLJJ of the turning plate 9, and the positioning pin 8 is used as a fulcrum to generate lever force, so that the turning plate 9 is ensured to stay at the horizontal position.
As shown in fig. 7 and 8, when the pipe column needs to be lifted, the rod column GZ is lifted from the pipe column, then the return plunger 10 is pushed to move upwards by pressing the rod column, the constant-pressure shear pin 12 is sheared, the return plunger 10 moves upwards under the action of the pushing force to push the turning plate 9 to lift upwards, the turning plate 9 is finally pushed to a horizontal position by the return plunger, the channel is closed again, and the liquid in the pipe column is sealed in the well below the turning plate 9.
Claims (1)
1. The utility model provides a board-like oil pipe liquid accuse blowout preventer in pit, including top connection (1), overcoat (3) and lower clutch (14), the both ends of overcoat (3) are connected with top connection (1) and lower clutch (14) through the screw thread respectively, be equipped with O type sealing washer (2, 15) respectively between this top connection (1) and overcoat (3) and between overcoat (3) and lower clutch (14), characterized in that, be equipped with the eccentric hole of top connection on the pipe wall of this top connection (1) one side, install spring (4) and compress tightly round pin axle (5) in this eccentric hole of top connection, install copper ring (6) in the centre bore lower extreme periphery tight fit on this top connection (1), install positioner (7) through the welding in the hole of positioner (7), install locating pin axle (8) in the hole of positioner (7), locating pin axle (8) pass the hole on turning over board (9) simultaneously; a pipe wall at one side of the outer sleeve (3) is provided with an outer sleeve eccentric hole corresponding to the upper joint eccentric hole, a return plunger (10) is arranged in the outer sleeve eccentric hole, and an upper O-shaped sealing ring (11) and a lower O-shaped sealing ring (13) are respectively arranged at the upper part and the lower part of the return plunger (10); a constant pressure shear pin (12) is arranged on the outer sleeve (3) through threads, and the front end of the constant pressure shear pin (12) is inserted into a hole arranged in the middle of the return plunger (10);
the spring (4) pushes the compression pin shaft (5) to press the turning plate (9), and a cam sharp angle is arranged at the position of the turning plate (9) where the positioning pin shaft (8) is arranged;
the turning plate (9) is positioned on the positioning device (7) by the positioning pin shaft (8), the turning plate (9) can rotate around the positioning pin shaft (8), the turning plate (9) is tightly attached to the copper ring (6) on the upper joint (1) when rotating to the horizontal position, and the turning plate (9) completely gives up a passage for opening an inner hole of the copper ring (6) when rotating to the vertical position to be attached to the inner wall of the outer sleeve (3).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910866550 | 2019-09-12 | ||
| CN2019108665504 | 2019-09-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110513070A CN110513070A (en) | 2019-11-29 |
| CN110513070B true CN110513070B (en) | 2024-02-02 |
Family
ID=68633815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910923902.5A Active CN110513070B (en) | 2019-09-12 | 2019-09-27 | Flap type downhole oil pipe hydraulic control blowout preventer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110513070B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111648736B (en) * | 2020-06-03 | 2023-05-12 | 中国石油化工股份有限公司 | Reducing mill shoe for well repair and tubular column assembly using same |
| CN115217752A (en) * | 2022-06-22 | 2022-10-21 | 中国石油大学(北京) | plunger |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH182445A (en) * | 1935-06-28 | 1936-02-15 | Kunz Max | Measuring apparatus, in particular water meters. |
| WO1991006743A1 (en) * | 1989-10-24 | 1991-05-16 | Lineham Donald H | Bottom hole blowout preventer |
| CN2690582Y (en) * | 2004-04-12 | 2005-04-06 | 新疆石油管理局钻井工艺研究院 | Under balance underwell well sealing device |
| CN201050341Y (en) * | 2007-06-08 | 2008-04-23 | 苑洪君 | Double safety casing inclined guiding check valve |
| CN201141294Y (en) * | 2008-04-21 | 2008-10-29 | 关晓东 | Movable plug |
| CN201902192U (en) * | 2010-06-02 | 2011-07-20 | 西南石油大学 | Float valve type underground blowout preventer |
| CN102628348A (en) * | 2012-05-03 | 2012-08-08 | 中国石油集团西部钻探工程有限公司 | Tubular tubing float valve |
| CN103481220A (en) * | 2013-09-23 | 2014-01-01 | 北京北方车辆集团有限公司 | Cam type pressing device |
| CN109779562A (en) * | 2019-03-12 | 2019-05-21 | 康庆刚 | Down-hole oil tube liquid controlled blowout preventing device |
| CN210858637U (en) * | 2019-09-12 | 2020-06-26 | 康庆刚 | Turning plate type underground oil pipe hydraulic control blowout preventer |
-
2019
- 2019-09-27 CN CN201910923902.5A patent/CN110513070B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH182445A (en) * | 1935-06-28 | 1936-02-15 | Kunz Max | Measuring apparatus, in particular water meters. |
| WO1991006743A1 (en) * | 1989-10-24 | 1991-05-16 | Lineham Donald H | Bottom hole blowout preventer |
| CN2690582Y (en) * | 2004-04-12 | 2005-04-06 | 新疆石油管理局钻井工艺研究院 | Under balance underwell well sealing device |
| CN201050341Y (en) * | 2007-06-08 | 2008-04-23 | 苑洪君 | Double safety casing inclined guiding check valve |
| CN201141294Y (en) * | 2008-04-21 | 2008-10-29 | 关晓东 | Movable plug |
| CN201902192U (en) * | 2010-06-02 | 2011-07-20 | 西南石油大学 | Float valve type underground blowout preventer |
| CN102628348A (en) * | 2012-05-03 | 2012-08-08 | 中国石油集团西部钻探工程有限公司 | Tubular tubing float valve |
| CN103481220A (en) * | 2013-09-23 | 2014-01-01 | 北京北方车辆集团有限公司 | Cam type pressing device |
| CN109779562A (en) * | 2019-03-12 | 2019-05-21 | 康庆刚 | Down-hole oil tube liquid controlled blowout preventing device |
| CN210858637U (en) * | 2019-09-12 | 2020-06-26 | 康庆刚 | Turning plate type underground oil pipe hydraulic control blowout preventer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110513070A (en) | 2019-11-29 |
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