CN114320212A - Oil pipe plug for under-pressure operation - Google Patents
Oil pipe plug for under-pressure operation Download PDFInfo
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- CN114320212A CN114320212A CN202210227713.6A CN202210227713A CN114320212A CN 114320212 A CN114320212 A CN 114320212A CN 202210227713 A CN202210227713 A CN 202210227713A CN 114320212 A CN114320212 A CN 114320212A
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Abstract
The invention belongs to the technical field of oil and gas field development, and discloses an oil pipe plug for under-pressure operation, which comprises a mandrel, wherein a fixed cylinder, a transition cylinder and a rubber cylinder are sleeved on the mandrel; the pump body and the one-way valve are arranged in the mandrel, the one-way valve is communicated with the rubber barrel, a through hole is formed in the side wall of the mandrel, and the through hole is communicated with the annulus between the working barrel and the mandrel. According to the oil pipe plug for the under-pressure operation, hydraulic setting is adopted, the pressure is maintained by the check valve and the regulating valve, the plug is less affected by the underground environment, and the setting reliability is high; the setting pressure can be controlled according to the underground pressure, the plugging effect is good, and the plugging device is suitable for high-pressure gas wells. The underground connection with the ground is established through microwave communication, and the ground control console can control hydraulic setting of the blanking plug and can also adjust setting pressure to finish secondary setting.
Description
Technical Field
The invention belongs to the technical field of oil and gas field development, and particularly relates to an oil pipe plug for under-pressure operation.
Background
In the well repairing process of oil and gas wells, well blowout is usually avoided by adopting a well killing mode in the past, namely well killing fluid is injected to balance the bottom pressure. However, the well killing operation not only pollutes the environment, but also the well killing fluid can invade a producing zone to cause the blocking of the producing zone and reduce the oil production, so the operation under pressure is usually adopted at present. For a high-pressure gas well, the operation under pressure can avoid using a well killing fluid, protect a production zone to the maximum extent, and also avoid overhigh pressure of a well mouth caused by rising and accumulation of gas at the well bottom, thereby greatly reducing the risk of blowout of the gas well and improving the operation safety. The pressurized operation needs to ensure the plugging of the internal channel of the oil pipe, so as to prevent blowout. Particularly for gas wells, natural gas has the physical characteristics of low density, flammability and explosiveness, so that blowout is more likely to occur compared with oil wells, and the internal plugging quality is particularly important.
In order to plug the interior of an oil pipe, an oil pipe plug is often used for operation under pressure, and the setting quality of the oil pipe plug is the key of the operation under pressure. In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art: in the pressure operation, the used plug is mostly a mechanical releasing plug, the setting pressure of the plug is fixed, the underground pressure change cannot be monitored, and the setting quality cannot be guaranteed; the problems of blocking, setting in advance and the like easily occur in the use process of the blanking plug; if the setting of the underground plug is poor, the plug needs to be thrown and fished again during treatment, and the method not only consumes time and labor, but also has potential safety hazards in the well team operation.
Disclosure of Invention
The present invention aims to solve the above technical problem at least to some extent. Therefore, the invention aims to provide the oil pipe plug for the pressure operation.
The technical scheme adopted by the invention is as follows:
an oil pipe plug for under-pressure operation comprises a mandrel, wherein a fixed cylinder, a transition cylinder and a rubber cylinder are sleeved on the mandrel, a working cylinder is sleeved on the fixed cylinder and the transition cylinder in a sliding manner, slips are arranged on the transition cylinder, and the slips are abutted to the working cylinder; the pump body and the one-way valve are arranged in the mandrel, the one-way valve is communicated with the rubber barrel, a through hole is formed in the side wall of the mandrel, and the through hole is communicated with the annulus between the working barrel and the mandrel.
Preferably, the check valve comprises a valve passage, a first spring and a ball valve body are arranged in the valve passage, the first spring is abutted against the ball valve body, and the ball valve body is contacted with the inner wall of the inlet end of the valve passage.
Preferably, the pump body is electrically connected with the processor, a positioning block is arranged in the mandrel, and the pump body is arranged on the positioning block.
Preferably, the processor comprises a microwave communication unit, an information storage unit, a processing unit and a battery pack, and the processing unit is electrically connected with the microwave communication unit, the information storage unit and the pump body respectively.
Preferably, the mandrel comprises an upper joint, a connecting block, a supporting block and a lower joint, the upper joint is connected with the upper end of the transition cylinder, the lower end of the transition cylinder is connected with the connecting block, the connecting block is connected with the lower joint, the supporting block is arranged in the lower joint, the check valve is arranged in the supporting block, the rubber cylinder is arranged on the connecting block, and the connecting block is provided with small holes, two ends of each small hole are respectively communicated with the check valve and the rubber cylinder; the pump body includes first pump body and second pump body, and the first pump body is installed in the top connection, and the second pump body is installed in the lower clutch.
Preferably, a first positioning block and a first processor are arranged in the upper joint, a second positioning block and a second processor are arranged in the lower joint, the first processor is in threaded connection with the transition cylinder, and the second processor is in threaded connection with the lower joint; the first pump body is arranged on the first positioning block, and the second pump body is arranged on the second positioning block.
Preferably, threaded connection is formed between the upper joint and the fixed cylinder, between the upper joint and the transition cylinder, between the connecting block and the transition cylinder and between the transition cylinder and the lower joint.
Preferably, the mandrel comprises an upper joint, a connecting block, a supporting block and a lower joint, the upper joint is connected with the upper end of the connecting block, the lower end of the connecting block is connected with the lower joint, and the supporting block is arranged in the upper joint; the check valve is arranged in the support block, the rubber cylinder is arranged on the connecting block, and the connecting block is provided with small holes of which two ends are respectively communicated with the check valve and the rubber cylinder.
Preferably, the slips are rotatably connected with the transition cylinder through a hinge shaft, and a second spring is arranged between the slips and the transition cylinder.
Preferably, a regulating valve is arranged in an annular space between the working barrel and the mandrel.
The invention has the beneficial effects that:
according to the oil pipe plug for the under-pressure operation, hydraulic setting is adopted, the pressure is maintained by the check valve and the regulating valve, the plug is less affected by the underground environment, and the setting reliability is high; the setting pressure can be controlled according to the underground pressure, the plugging effect is good, and the plugging device is suitable for high-pressure gas wells. The underground connection with the ground is established through microwave communication, and the ground control console can control hydraulic setting of the blanking plug and can also adjust setting pressure to finish secondary setting.
The setting pressure of the blanking plug is controlled on the ground console, the setting quality of the blanking plug is ensured, the problems of blockage, advanced setting and the like of the blanking plug easily caused by the traditional blanking plug can be avoided, and the setting efficiency is improved; when the plugging quality of the plugging device is poor, the internal pressure of the plugging device can be controlled from the ground to carry out secondary setting, and the secondary throwing and fishing are not needed.
Drawings
FIG. 1 is a cross-sectional view of a tubing plug for medium pressure operations in accordance with an embodiment of the present invention.
Fig. 2 is an enlarged view of a portion a in fig. 1.
FIG. 3 is a sectional view of a tubing plug for medium pressure operation in accordance with a second embodiment of the present invention.
Fig. 4 is a functional diagram of the processor of the present invention.
In the figure: 1-upper joint; 2, connecting blocks; 3-a support block; 4-lower joint; 5, fixing the cylinder; 6-a transition cylinder; 7-a rubber cylinder; 8-working barrel; 9-slips; 10-valve way; 11-a first spring; 12-a ball valve body; 13-a through hole; 14-a regulating valve; 15-a first pump body; 16-a first positioning block; 17-a first processor; 18-a second pump body; 19-a second locating block; 20-a second processor; 21-a second spring; 22-sealing ring.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
In the description of the embodiments of the present invention, it should be noted that the indication of the orientation or the positional relationship is based on the orientation or the positional relationship shown in the drawings, or the orientation or the positional relationship which is usually placed when the product of the present invention is used, or the orientation or the positional relationship which is conventionally understood by those skilled in the art, is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or the element which is indicated must have a specific orientation, be constructed in a specific orientation and operate, and thus, cannot be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.
Example one
As shown in fig. 1 and 2, the tubing plug for under-pressure operation of the present embodiment includes a mandrel, a fixed cylinder 5, a transition cylinder 6, a rubber cylinder 7, a working cylinder 8, a slip 9, a pump body, a check valve and a processor, wherein the mandrel includes an upper joint 1, a connecting block 2, a supporting block 3 and a lower joint 4, the fixed cylinder 5 is sleeved on the upper portion of the upper joint 1, the lower end of the upper joint 1 is connected with the upper end of the transition cylinder 6, the lower end of the transition cylinder 6 is connected with the connecting block 2, the connecting block 2 is connected with the lower joint 4, the supporting block 3 is arranged in the lower joint 4, the check valve is arranged in the supporting block 3, the rubber cylinder 7 is mounted on the connecting block 2, and the rubber cylinder 7 is squeezed by the retaining shoulders of the transition cylinder 6 and the lower joint 4; the connecting block 2 is provided with a small hole with two ends respectively communicated with the one-way valve and the rubber cylinder 7.
The number of the pump bodies is two, the two pump bodies are respectively a first pump body 15 and a second pump body 18, the one-way valve comprises a valve passage 10, a first spring 11 and a ball valve body 12, the valve passage 10 is a through hole formed in the supporting block 3, the first spring 11 and the ball valve body 12 are arranged in the valve passage 10, the first spring 11 is abutted against the ball valve body 12, the second pump body 18 is arranged in the lower connector 4, the second pump body 18 is opposite to the inlet end of the valve passage 10, the inlet end of the valve passage 10 is a circular truncated cone-shaped hole, and the smaller end of the circular truncated cone-shaped hole is close to the second pump body 18; the ball valve body 12 contacts with the inner wall of the circular truncated cone-shaped hole to keep sealing.
The working barrel 8 is slidably sleeved on the fixed barrel 5 and the transition barrel 6, a sealing ring 22 is arranged between the working barrel 8 and the fixed barrel 5, and a sealing ring is also arranged between the working barrel 8 and the transition barrel 6. The first pump body 15 is installed in the upper joint 1, a through hole 13 is formed in the side wall of the upper joint 1, the through hole 13 is communicated with an annular space between the working barrel 8 and the upper joint 1, the annular space is specifically an annular space surrounded by the outer wall of the upper joint 1, the inner wall of the working barrel 8, the lower end of the fixed barrel 5 and the upper end of the transition barrel 6, and a regulating valve 14 is arranged in the annular space.
The number of processors is two, the two processors are respectively a first processor 17 and a second processor 20; be equipped with first locating block 16 and first treater 17 in the top connection 1, first pump body 15 is installed on first locating block 16, and the box and the transition section of thick bamboo 6 threaded connection of first treater 17, first pump body 15 and first treater 17 electric connection.
A second positioning block 19 and a second processor 20 are arranged in the lower joint 4, a second pump body 18 is arranged on the second positioning block 19, and a box body of the second processor 20 is in threaded connection with the lower joint 4; the second pump 18 is electrically connected to the second processor 20.
The upper joint 1 and the fixed cylinder 5, the upper joint 1 and the transition cylinder 6, the connecting block 2 and the transition cylinder 6 and the lower joint 4 are in threaded connection.
The first pump body 15 and the second pump body 18 both adopt micropumps, as shown in fig. 4, the processor includes a microwave communication unit, an information storage unit, a processing unit and a battery pack, and the processing unit is electrically connected with the microwave communication unit, the information storage unit and the pump body respectively. The microwave communication unit can exchange microwave information with a ground console through a microwave repeater arranged in the oil pipe in advance; the processing unit can process the received data and instructions and start the battery pack to adjust the pressure of the micro pump; the data returned by the underground sensor are stored in the information storage unit, the processing unit reads the stored data and converts the data into microwave signals through the microwave communication unit, and the signals finally return to the ground console through the middle microwave relay.
When the oil pipe plug for operation under pressure works in the embodiment, the ground control console converts the instruction into a microwave signal and sends the microwave signal to the underground, and the signal is transmitted to the microwave communication unit of the processor through the microwave repeater in the oil pipe. Upon receiving the command, the processing unit opens the internal battery and regulates the pressure of the first pump 15 and the second pump 18, respectively. The pumping pressure of the first pump body 15 enters the annular space between the working cylinder 8 and the upper connector 1 through the through hole 13, the working cylinder 8 is pushed after the regulating valve 14 is passed, and the working cylinder 8 is forced to push the slips 9 to be opened so as to complete the anchoring of the plug. When the pumping pressure of the second pump body 18 exceeds the pushing force of the first spring 11, the ball valve body 12 is opened, and the pressure enters the inner cavity of the rubber sleeve 7 through the valve passage 10 to promote the rubber sleeve 7 to expand to complete setting. During the working process, data collected by the underground sensor are stored in an information storage unit of the processor, the data are processed by the processing unit and then sent out through the microwave communication unit, and finally transmitted back to the ground through the middle microwave relay.
Example two
As shown in fig. 3, the tubing plug for work under pressure of the present embodiment has a structure similar to that of the tubing plug of the first embodiment, except that only one pump body is provided as the first pump body 15; only one processor is set as the first processor 17; the mandrel comprises an upper joint 1, a connecting block 2, a supporting block 3 and a lower joint 4, wherein the upper joint 1 is connected with the upper end of the connecting block 2, the lower end of the connecting block 2 is connected with the lower joint 4, and the supporting block 3 is arranged in the upper joint 1; the check valve is arranged in the supporting block 3, the rubber cylinder 7 is arranged on the connecting block 2, and the connecting block 2 is provided with small holes of which two ends are respectively communicated with the check valve and the rubber cylinder 7. The first pump body 15 is arranged on the supporting block 3, and the box body of the first processor 17 is in threaded connection with the upper connector 1. The through hole 13 is communicated with the annular space between the working barrel 8 and the upper joint 1 through the side wall of the supporting block 3 and the side wall of the upper joint 1.
When the tubing plug for operation under pressure in this embodiment is in operation, the microwave signal of the ground console is transmitted to the microwave communication unit of the first processor 17 through the microwave repeater. Upon receipt of the command, the processing unit of the first processor 17 activates the first pump body 15 and regulates the pressure. In operation, the pressure is first adjusted to the anchoring pressure. The pumping pressure enters the annulus between the mandrel 8 and the top sub 1 through the through hole 13, pushes the mandrel 8 through the control valve 14, and causes the slips 9 to open to complete the anchoring of the plug. After anchoring, according to the underground pressure, the pressure is increased to the reliable setting pressure, and finally enters the inner cavity of the rubber cylinder 7 through the one-way valve formed by the valve passage 10, the first spring 11 and the ball valve body 12 to promote the rubber cylinder 7 to expand and set.
The invention is not limited to the above alternative embodiments, and any other various forms of products can be obtained by anyone in the light of the present invention, but any changes in shape or structure thereof, which fall within the scope of the present invention as defined in the claims, fall within the scope of the present invention.
Claims (10)
1. The utility model provides an oil pipe plug for area pressure operation which characterized in that: the slip type slip casting machine comprises a mandrel, wherein a fixed cylinder (5), a transition cylinder (6) and a rubber cylinder (7) are sleeved on the mandrel, a working cylinder (8) is sleeved on the fixed cylinder (5) and the transition cylinder (6) in a sliding manner, slips (9) are installed on the transition cylinder (6), and the slips (9) are abutted to the working cylinder (8); the pump body and the check valve are arranged in the mandrel, the check valve is communicated with the rubber barrel (7), a through hole (13) is formed in the side wall of the mandrel, and the through hole (13) is communicated with an annulus between the working barrel (8) and the mandrel.
2. The tubing plug of claim 1, wherein: the check valve comprises a valve channel (10), wherein a first spring (11) and a ball valve body (12) are arranged in the valve channel (10), the first spring (11) is abutted against the ball valve body (12), and the ball valve body (12) is in contact with the inner wall of the inlet end of the valve channel (10).
3. The tubing plug of claim 1, wherein: the pump body and treater electric connection are equipped with the locating piece in the dabber, and the pump body is installed on the locating piece.
4. The tubing plug of claim 3, wherein: the processor comprises a microwave communication unit, an information storage unit, a processing unit and a battery pack, wherein the processing unit is electrically connected with the microwave communication unit, the information storage unit and the pump body respectively.
5. Tubing plug according to any of claims 1-4, wherein: the mandrel comprises an upper connector (1), a connecting block (2), a supporting block (3) and a lower connector (4), the upper connector (1) is connected with the upper end of a transition cylinder (6), the lower end of the transition cylinder (6) is connected with the connecting block (2), the connecting block (2) is connected with the lower connector (4), the supporting block (3) is arranged in the lower connector (4), a one-way valve is arranged in the supporting block (3), a rubber cylinder (7) is arranged on the connecting block (2), and small holes with two ends respectively communicated with the one-way valve and the rubber cylinder (7) are formed in the connecting block (2); the pump body comprises a first pump body (15) and a second pump body (18), wherein the first pump body (15) is installed in the upper joint (1), and the second pump body (18) is installed in the lower joint (4).
6. Tubing plug according to claim 5, wherein: a first positioning block (16) and a first processor (17) are arranged in the upper joint (1), a second positioning block (19) and a second processor (20) are arranged in the lower joint (4), the first processor (17) is in threaded connection with the transition cylinder (6), and the second processor (20) is in threaded connection with the lower joint (4); the first pump body (15) is arranged on the first positioning block (16), and the second pump body (18) is arranged on the second positioning block (19).
7. Tubing plug according to claim 5, wherein: and the upper joint (1) is in threaded connection with the fixed cylinder (5), the upper joint (1) is in threaded connection with the transition cylinder (6), the connecting block (2) is in threaded connection with the transition cylinder (6), and the transition cylinder (6) is in threaded connection with the lower joint (4).
8. Tubing plug according to any of claims 1-4, wherein: the mandrel comprises an upper connector (1), a connecting block (2), a supporting block (3) and a lower connector (4), the upper connector (1) is connected with the upper end of the connecting block (2), the lower end of the connecting block (2) is connected with the lower connector (4), and the supporting block (3) is arranged in the upper connector (1); the check valve is arranged in the supporting block (3), the rubber cylinder (7) is arranged on the connecting block (2), and small holes with two ends respectively communicated with the check valve and the rubber cylinder (7) are formed in the connecting block (2).
9. The tubing plug of claim 1, wherein: the slips (9) are rotationally connected with the transition cylinder (6) through a hinge shaft, and a second spring (21) is arranged between the slips (9) and the transition cylinder (6).
10. The tubing plug of claim 1, wherein: an adjusting valve (14) is arranged in an annular space between the working barrel (8) and the mandrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210227713.6A CN114320212B (en) | 2022-03-10 | 2022-03-10 | Oil pipe plug for operation under pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210227713.6A CN114320212B (en) | 2022-03-10 | 2022-03-10 | Oil pipe plug for operation under pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114320212A true CN114320212A (en) | 2022-04-12 |
| CN114320212B CN114320212B (en) | 2022-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210227713.6A Active CN114320212B (en) | 2022-03-10 | 2022-03-10 | Oil pipe plug for operation under pressure |
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Inventor after: Dong Liangliang Inventor after: Chen Gang Inventor after: He Yarui Inventor after: Huang Li Inventor after: Zhou Changlin Inventor after: Fan Yu Inventor after: Luo Wei Inventor after: Feng Xingzheng Inventor after: Jia Shasha Inventor after: Liu Xiaodong Inventor after: Liu Rui Inventor before: Zhou Changlin Inventor before: Chen Gang Inventor before: He Yarui Inventor before: Fan Yu Inventor before: Luo Wei Inventor before: Dong Liangliang Inventor before: Feng Xingzheng Inventor before: Jia Shasha Inventor before: Huang Li Inventor before: Liu Xiaodong Inventor before: Liu Rui |
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Address after: 610599 No. 8 Xindu Avenue, Xindu District, Chengdu City, Sichuan Province Patentee after: SOUTHWEST PETROLEUM University Patentee after: Sichuan shengnuo oil and Gas Engineering Technology Service Co., Ltd Address before: 618300 No. 6 East Guangdong Road, Guanghan, Deyang, Sichuan Patentee before: SICHUAN SHENGNUO OIL. AND GAS ENGINEERING TECHNOLOGY SERVICE Co.,Ltd. Patentee before: Southwest Petroleum University |