CN114718491A - Hydraulic pressure type pressure taking and delivering back pressure valve tool - Google Patents
Hydraulic pressure type pressure taking and delivering back pressure valve tool Download PDFInfo
- Publication number
- CN114718491A CN114718491A CN202110011701.5A CN202110011701A CN114718491A CN 114718491 A CN114718491 A CN 114718491A CN 202110011701 A CN202110011701 A CN 202110011701A CN 114718491 A CN114718491 A CN 114718491A
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- rod
- taking
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- pressure
- back pressure
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- 230000007704 transition Effects 0.000 claims abstract description 25
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 4
- 239000004519 grease Substances 0.000 claims description 3
- 210000002445 nipple Anatomy 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 25
- 238000000034 method Methods 0.000 abstract description 9
- 238000005553 drilling Methods 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 8
- 238000009434 installation Methods 0.000 description 4
- 239000003208 petroleum Substances 0.000 description 3
- 241000191291 Abies alba Species 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/08—Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems
- E21B23/10—Tools specially adapted therefor
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a drill rod well completion tool in the technical field of drilling and completion of oil drilling and downhole operation tools, in particular to a hydraulic type back pressure valve tool with pressure delivery, which comprises a bidirectional manual hydraulic pump, a hydraulic cylinder, a piston rod, a connector, a connecting sleeve, a transition flange, a connecting rod, a delivery rod, a conversion joint and a delivery joint. The piston rod can move upwards or downwards under the action of the hydraulic cylinder, the piston rod is connected with the connecting rod through the connecting sleeve, one end of the transition flange is connected with the hydraulic cylinder through the connecting body, the other end of the transition flange can be connected with a gas production tree, the connecting rod is connected with the taking and delivering rod, and the taking and delivering rod is connected with the taking and delivering joint through the conversion joint. Through the up-and-down motion of hydraulic control piston rod, and then can take out or send into well head back pressure valve under the condition that the well head area was pressed. The invention has simple principle, reliable control and convenient operation, can control the pressure above the back pressure valve by adjusting the pressure of the bidirectional manual hydraulic pump, further realizes safe operation, and is suitable for emergency drill rod well completion and underground operation construction processes.
Description
Technical Field
The invention relates to a drill rod well completion tool in the technical field of drilling and completion of oil drilling and downhole operation tools, in particular to a hydraulic pressure type tool with a pressure taking and sending back pressure valve.
Background
At present, the external dependency of petroleum in China approaches 70%, so that the active exploration of new blocks and the strengthening of the development of old blocks are two paths for guaranteeing the petroleum supply in China. In new block exploration, high pressure wells are often encountered, and it may be necessary to temporarily seal the wellhead pressure while completing the well, for example, a gas drilling well is drilled after encountering a high pressure hydrocarbon formation for emergency drill pipe completion, and the drill pipe is used as a tubing for oil or gas production. At this point, a back pressure valve is required to be mounted on the wellhead drill rod hanger to seal the drilling tool and seal the wellhead. After the gas production tree (or the oil production tree) is installed, the back pressure valve needs to be taken out, a gas production (or oil production) channel is established, and the back pressure valve needs to be detached under pressure in the above process. In another case, for the oil and gas well in production, when repairing the well or replacing the gas production tree (or the Christmas tree), firstly, a back pressure valve is used for sealing off the well head, and the leakage of the downhole pressure is cut off, so that the gas production tree (or the Christmas tree) is safely removed and replaced, and the process involves the installation of the back pressure valve under pressure. After the replacement is finished, the pressure test of the gas production tree (or the gas production tree) is qualified, and then the back pressure valve needs to be taken out again, so that gas production (or oil production) channels at the bottom and the top of a well are established, and the process also relates to the process of disassembling and taking out the back pressure valve under the pressure condition.
At present, two tools are provided for a taking (sending) back pressure valve, one tool is a common taking and sending rod connected with a taking and sending joint, and the tool is suitable for the condition that the pressure of a wellhead is very small or the wellhead has no pressure through manual operation at the wellhead. If the pressure of a well head is large, the backpressure valve is generally taken out or sent in by adopting a balanced pressure method at present, specifically, the pressure of the well head closed is communicated with the upper space of the backpressure valve in a certain mode, so that the upper pressure and the lower pressure of the backpressure valve are the same, and the backpressure valve can be taken out or sent in under the balanced pressure. For the tool for taking (sending) the back pressure valve under pressure, although the second method realizes the installation or the disassembly of the back pressure valve under the condition of pressure balance, the operation flow is more complicated, a plurality of valves need to be switched, the practicability has certain limitation, and when the tool is used for taking (sending) the back pressure valve under the condition of no pressure at a well head, the structure and the function of the tool are redundant because the upper and lower pressure balance of the back pressure valve does not need to be adjusted. Therefore, how to take (send) the wellhead back pressure valve under pressure in a drilling mode which is low in cost, easy to operate and convenient to popularize is a difficult problem in the current petroleum well completion and operation process.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a hydraulic tool for taking and sending a back pressure valve under pressure. The technical scheme is as follows:
a hydraulic tool for taking and delivering a backpressure valve under pressure comprises a hydraulic driving device, a piston rod, a connecting body, a transition flange, a connecting rod and a backpressure valve taking and delivering joint;
furthermore, the hydraulic driving device is arranged above the connecting body, and a transition flange is connected below the connecting body;
further, the hydraulic driving device is in driving connection with the piston rod, a connecting rod is rotatably connected below the piston rod, and a back pressure valve taking and delivering joint is connected below the connecting rod;
furthermore, the connecting end of the piston rod and the connecting rod is positioned above the transition flange, the connecting rod penetrates through the transition flange to be connected with the taking and feeding joint of the back pressure valve, and the connecting rod is in sliding sealing fit with the transition flange.
Furthermore, the hydraulic driving device comprises a manual bidirectional hydraulic pump and a hydraulic cylinder, the hydraulic pump is connected with the hydraulic cylinder through a hydraulic pipeline, and a piston rod is arranged in the hydraulic cylinder.
Furthermore, the connecting device also comprises a connecting sleeve, and the piston rod is rotatably connected with the connecting rod through the connecting sleeve.
Furthermore, the device also comprises a taking and delivering rod; the connecting rod is connected with the taking and delivering rod through threads, and the taking and delivering rod is connected with the taking and delivering joint of the back pressure valve.
Further, the device also comprises a conversion joint; the taking and delivering rod is connected with the taking and delivering joint of the back pressure valve through a conversion joint.
Furthermore, the bidirectional manual hydraulic pump is connected with the two oil ports of the hydraulic cylinder through two hydraulic pipelines.
Furthermore, the cross section of the rod body of the connecting rod is in a circular ring shape, the cross section of the rod body of the taking and delivering rod is in a square ring shape, the connecting rod and the end of the taking and delivering rod are provided with mutually matched threads, and the connecting rod is in threaded connection with the taking and delivering rod.
Furthermore, a tool groove is formed in the lower portion of the connecting rod.
Furthermore, a grease nipple, a pressure gauge and a pressure release valve are arranged on the transition flange.
Furthermore, a dynamic seal is arranged between the connecting rod and the transition flange.
The invention has the advantages that: compared with the conventional mode of communicating the upper side and the lower side of the back pressure valve to achieve pressure balance, the hydraulic pressure is directly used for driving the taking and sending rod and applying certain pressure, frequent switching between the valves is avoided, the pressure regulation is directly regulated through the bidirectional manual hydraulic pump, and the hydraulic pressure regulating device has the advantages of simplicity in operation, low cost and suitability for field application and popularization.
Drawings
Fig. 1 is a schematic structural diagram of a hydraulic pressure type tool for taking and sending a back pressure valve under pressure.
Fig. 2 is a schematic view of the connection structure of the adapter and the pick-up rod according to the present invention.
In the figure:
1. the hydraulic system comprises a bidirectional manual hydraulic pump, 2, a hydraulic cylinder, 3, a piston rod, 4, a connector, 5, a connecting sleeve, 6, a transition flange, 7, a connecting rod, 8, a taking and delivering rod, 9, a conversion joint, 10, a back pressure valve taking and delivering joint, 11 and a dynamic seal.
Detailed Description
The present invention will be further specifically described with reference to the following examples.
As shown in fig. 1, the hydraulic pressure type tool with the pressure taking and sending back pressure valve mainly comprises a bidirectional manual hydraulic pump 1, a hydraulic cylinder 2, a piston rod 3, a connecting body 4, a connecting sleeve 5, a transition flange 6, a connecting rod 7, a taking and sending rod 8, a conversion joint 9 and a back pressure valve taking and sending joint 10.
The installation sequence is as follows: the two-way manual hydraulic pump 1 is connected with two oil ports of the hydraulic cylinder 2 through two hydraulic pipelines, the piston rod 3 is assembled in the hydraulic cylinder 2 and is matched with the sliding seal 11 of the hydraulic cylinder 2, the piston rod 3 can move upwards or downwards under the action of the hydraulic cylinder, and the piston rod 3 is connected with the connecting rod 7 through the connecting sleeve 5.
The connecting sleeve 5 is a rotating sleeve with two ends provided with inward extending steps, the connecting ends of the piston rod 3 and the connecting rod 7 are end heads provided with outward extending steps, the two connecting ends are assembled in the connecting sleeve 5 in an opposite buckling mode to form rotating connection, and preferably, a bearing can be installed to reduce rotating resistance.
One end of the transition flange 6 is connected with the cylinder body of the hydraulic cylinder 2 through the connector 4, and the other end is connected with the wellhead gas production tree.
The connecting rod 7 is connected with the taking and delivering rod 8 through threads, and the taking and delivering rod 8 is connected with the back pressure valve taking and delivering joint 10 through the adapter 9.
In this embodiment, the end threaded connection crossover sub 9 under the pole 8 is got and is sent, crossover sub 9 one end be equipped with get send pole 8 screw-thread fit's screw thread, the other end be with the back pressure valve get send connect 10 grafting complex barrel, set up the screw hole on the barrel, back pressure valve get send connect 10 insert crossover sub 9 after, through set screw fixed.
The bidirectional manual hydraulic pump 1 has three gears, and under the forward gear, the bidirectional manual hydraulic pump 1 is pressurized, so that hydraulic oil of the hydraulic cylinder 2 pushes the piston rod 3 to move downwards; under a backward gear, pressurizing the bidirectional manual hydraulic pump 1 to enable hydraulic oil of the hydraulic cylinder 2 to push the piston rod 3 to move upwards; in the intermediate gear, the hydraulic pressure keeps the current pressure unchanged, and further, the axial pressure and the position of the piston rod 3 and the fetching and sending rod 8 are kept unchanged.
The transition flange 6 is the same as the flange on the end face of the gas production tree in type, and the transition flange and the gas production tree are connected through the flange. After the connection, the annular space between the transition flange 6 and the connecting rod 7 and the space above the back pressure valve of the gas production tree are ensured to form a closed space.
The stroke of the piston rod 3 is larger than the distance from the installation position of the back pressure valve to the main valve of the gas production tree, so that the back pressure valve can be lifted upwards to be above the main valve of the gas production tree after being screwed out, and then the main valve of the gas production tree can be closed, and the well mouth is closed or opened by the gas production tree.
The connecting sleeve 5, the piston rod 3 and the connecting rod 7 can circumferentially float, and circumferential movement between the piston rod 3 and the connecting rod 7 is allowed, so that the backpressure valve delivery connector 10 and the backpressure valve can be screwed through threads after being in contact with each other.
A dynamic seal 11 is arranged between a connecting rod 7 and a transition flange 6 of the tool, and the dynamic seal 11 mainly comprises a reciprocating dynamic seal 11 and also has the function of a low-speed rotating dynamic seal 11. The connecting rod 7 moves up and down to be close to or far away from the backpressure valve, and when the backpressure valve with threads needs to be rotated in the process of taking and sending the backpressure valve, the sealing performance of a well mouth can still be ensured.
In this embodiment, the transition flange 6 may further include a grease nipple, a pressure gauge, and a pressure release valve (not labeled in the drawing). The pressure gauge can read the pressure in the closed space above the back pressure valve, the pressure gauge is used for judging whether the back pressure valve is completely taken out or not and calculating the pressure to be applied to the piston rod 3, the pressure to be applied to the piston rod 3 is the difference between the wellhead casing pressure and the reading of the pressure gauge, and if the back pressure valve is completely taken out, the reading of the pressure gauge is equal to the wellhead pressure. The relief valve is used for closing the gas production tree main valve when the back pressure valve is taken out and moves upwards to a position above the gas production tree main valve under the driving of the taking and sending rod 8, and the relief valve is opened to release compressed gas in a closed space above the main valve, so that low-pressure operation is performed.
The cross section of the connecting rod 7 is in a circular ring shape, and is in micro clearance fit with the taking and delivering rod 8. The cross section of the taking and delivering rod 8 is in a square ring shape.
The lower part of the connecting rod 7 is provided with a tool groove which is a plug-in groove matched with other conventional tools and has the effect that after the back pressure valve taking and sending joint 10 contacts the back pressure valve, the connecting rod 7 is conveniently rotated by using a tool above a wellhead gas production tree, the back pressure valve taking and sending joint 10 is ensured to be sufficiently screwed into the back pressure valve or the back pressure valve is sufficiently screwed into a hanger, and then torque is applied to take out or send into the back pressure valve.
The hydraulic type tool for the back pressure valve with the pressure for taking and delivering can drive the taking and delivering rod 8 to move by controlling the bidirectional manual hydraulic pump 1, can apply pressure to the taking and delivering rod 8 through hydraulic pressure, further apply pressure to the taking and delivering joint, and take out or install the back pressure valve under the action of wellhead pressure, so that the purpose of safe construction is finally achieved. The tool is low in manufacturing cost and simple to operate, is suitable for construction such as emergency drill rod well completion and underground well workover operation, and ensures safe and efficient operation of personnel under the condition of wellhead pressure.
The embodiments disclosed herein are to be considered in all respects as illustrative and not restrictive. The above-described embodiments may be omitted, replaced, or modified in various ways without departing from the scope of the appended claims and the gist thereof.
Claims (10)
1. The hydraulic tool for taking and sending the backpressure valve under pressure is characterized by comprising a hydraulic driving device, a piston rod (3), a connecting body (4), a transition flange (6), a connecting rod (7) and a backpressure valve taking and sending joint (10);
the hydraulic driving device is arranged above the connecting body (4), and a transition flange (6) is connected below the connecting body (4);
the hydraulic driving device is in driving connection with the piston rod (3), a connecting rod (7) is rotatably connected below the piston rod (3), and a back pressure valve taking and delivering joint (10) is connected below the connecting rod (7); the connecting end of the piston rod (3) and the connecting rod (7) is positioned above the transition flange (6), the connecting rod (7) penetrates through the transition flange (6) to be connected with the back pressure valve taking and feeding joint (10), and the connecting rod (7) is matched with the transition flange (6) in a sliding sealing mode (11).
2. The tool with the pressure extracting and sending back pressure valve as claimed in claim 1, wherein the hydraulic driving device comprises a manual bidirectional hydraulic pump and a hydraulic cylinder (2), the hydraulic pump is connected with the hydraulic cylinder (2) through a hydraulic pipeline, and a piston rod (3) is installed in the hydraulic cylinder (2).
3. The tool with the pressure for taking and sending the backpressure valve as claimed in claim 1, further comprising a connecting sleeve (5), wherein the piston rod (3) and the connecting rod (7) are rotatably connected through the connecting sleeve (5).
4. A hydraulic tool with pressure for extracting and sending back pressure valve according to any one of claims 1-3, characterized by further comprising an extracting and sending rod (8); the connecting rod (7) is connected with the taking and delivering rod (8) through threads, and the taking and delivering rod (8) is connected with the taking and delivering joint (10) of the backpressure valve.
5. A hydraulic pressure extracting and sending back pressure valve tool according to claim 5, characterized by further comprising an adapter (9); the taking and delivering rod (8) is connected with a taking and delivering joint (10) of a backpressure valve through a conversion joint (9).
6. The tool with the pressure extracting and sending back pressure valve as claimed in claim 5, characterized in that the bidirectional manual hydraulic pump (1) is connected with two oil ports of the hydraulic cylinder (2) through two hydraulic pipelines.
7. The hydraulic pressure fetching and sending back pressure valve tool with pressure as claimed in claim 5, characterized in that the cross section of the rod body of the connecting rod (7) is circular, the cross section of the rod body of the fetching and sending rod (8) is square ring, the ends of the connecting rod (7) and the fetching and sending rod (8) are provided with mutually matched threads, and the connecting rod (7) is in threaded connection with the fetching and sending rod (8).
8. The tool with the pressure for taking and sending the back pressure valve is characterized in that a tool groove is formed in the lower portion of the connecting rod (7).
9. The tool for the hydraulic pressure taking and sending back pressure valve with pressure as claimed in claim 5, wherein the transition flange (6) is provided with a grease nipple, a pressure gauge and a pressure relief valve.
10. A hydraulic tool with pressure to take and send back pressure valve according to claim 5, characterized in that a dynamic seal (11) is arranged between the connecting rod (7) and the transition flange (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110011701.5A CN114718491A (en) | 2021-01-06 | 2021-01-06 | Hydraulic pressure type pressure taking and delivering back pressure valve tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110011701.5A CN114718491A (en) | 2021-01-06 | 2021-01-06 | Hydraulic pressure type pressure taking and delivering back pressure valve tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114718491A true CN114718491A (en) | 2022-07-08 |
Family
ID=82233615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110011701.5A Pending CN114718491A (en) | 2021-01-06 | 2021-01-06 | Hydraulic pressure type pressure taking and delivering back pressure valve tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114718491A (en) |
-
2021
- 2021-01-06 CN CN202110011701.5A patent/CN114718491A/en active Pending
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