CN115977588A - High-gas-content well lifting pipe column - Google Patents
High-gas-content well lifting pipe column Download PDFInfo
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- CN115977588A CN115977588A CN202310069817.3A CN202310069817A CN115977588A CN 115977588 A CN115977588 A CN 115977588A CN 202310069817 A CN202310069817 A CN 202310069817A CN 115977588 A CN115977588 A CN 115977588A
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Abstract
The invention discloses a high-gas-content well lifting pipe column. The method comprises the following steps: the device comprises a shell, wherein a first production sliding sleeve, an insertion seal, a second production sliding sleeve, a positioning seal, an oil pipe, a canned electric submersible pump device, a lifting oil pipe and an underground safety valve which are sequentially connected are arranged inside the shell from bottom to top; an electric submersible pump and a degassing working barrel which are connected in sequence are arranged in the canned electric submersible pump device from bottom to top; the free end of the power cable extends into the canned electric submersible pump device and is electrically connected with the electric submersible pump; the liquid-gas type jet pump is used for discharging gas at the top end of the electric submersible pump when the produced liquid gas content rises and the electric submersible pump cannot work normally through a steel wire, so that the electric submersible pump can work normally. The invention has the beneficial effects that: the device is provided with a degassing working barrel and a liquid-carrying gas type jet pump, and can convert kinetic energy of mixed gas and liquid into pressure energy to be lifted to the ground so as to realize the lifting of the canned electric submersible pump device of high-gas-content stratum liquid.
Description
Technical Field
The invention relates to the technical field of petroleum, in particular to a high-gas-content well lifting pipe column.
Background
The oil and gas wells 590 and 484 produced by the Bohai sea oil field account for 24.5 percent of the total number of the oil and gas wells of the Bohai sea oil field. Wherein the high gas-containing well condition electric pump production well has 102 ports in total, and the gas-liquid ratio at the well port is 50-100m3/m 3 Interval well 57.
When the gas content is high, the stratum generates gas channeling phenomenon in succession, the electric pump is difficult to ensure stable operation during gas channeling, the operation current of the electric pump is changed violently and has obvious typical characteristics of a saw-tooth shape, and in order to avoid the phenomena of overlarge influence of gas on the electric pump, no load, reduction of the effective lifting lift of the electric pump and the like, the platform needs to perform regular environmental control liquid supplement and positive extrusion clear water to remove redundant gas in the pump cavity of the electric pump and avoid gas lock; and inhibiting the coning of the gas by means of non-regular sleeve pressure release, frequency reduction, yield limitation and the like.
The gas content of the pump suction inlet is too high, so that the separation efficiency of the conventional under-pump separator is reduced, the airlock is stopped seriously, the stable operation of the lifting equipment is seriously influenced, the operation efficiency of the lifting equipment is greatly reduced, and the purposes of continuous lifting and stable production are difficult to realize.
Disclosure of Invention
The invention aims to provide a high-gas-content well lifting pipe column which is provided with a degassing working barrel and a liquid-gas type jet pump, and can convert kinetic energy of mixed gas and liquid into pressure energy to lift to the ground so as to realize the lifting of a canned electric submersible pump of high-gas-content stratum liquid.
In order to achieve the purpose, the invention adopts the following technical scheme that:
the device comprises a shell, wherein a first production sliding sleeve, an insertion seal, a second production sliding sleeve, a positioning seal, an oil pipe, a canned electric submersible pump device, a lifting oil pipe and an underground safety valve which are sequentially connected are arranged inside the shell from bottom to top; an electric submersible pump and a degassing working barrel which are connected in sequence are arranged in the canned electric submersible pump device from bottom to top; the free end of the power cable extends into the canned electric submersible pump device and is electrically connected with the electric submersible pump; the liquid-carrying-gas type jet pump rises in the gas content of produced liquid, and when the electric submersible pump cannot work normally, the electric submersible pump goes into the degassing working barrel through a steel wire and is used for discharging gas at the top end of the electric submersible pump, so that the normal work of the electric submersible pump is ensured.
Preferably, a landing sub is provided between the lift tubing and the downhole safety valve.
Preferably, an over-cable packer is provided between the housing and the landing sub.
Preferably, a diffusion pipe is arranged at the upper end of the liquid-gas type jet pump, a throat pipe is arranged in the diffusion pipe, and a nozzle is arranged right below the throat pipe.
Preferably, be equipped with a plurality of recesses on the lateral wall of degasification working barrel the middle part and the bottom of liquid area gas type jet pump are equipped with upper seal module and lower seal module respectively the periphery of diffusion tube is equipped with the lock core, upper seal module and lower seal module respectively with the recess cooperatees.
Preferably, a degassing working barrel switch which can be opened through a steel wire is arranged at the lower part of the degassing working barrel.
The invention has the beneficial effects that: the device is provided with a degassing working barrel and a liquid-gas type jet pump, and can convert kinetic energy of mixed gas and liquid into pressure energy to lift to the ground so as to realize the lifting of the canned electric submersible pump device of the high-gas-content formation liquid.
Drawings
Fig. 1 is a schematic diagram of a high-gas-content well lifting pipe column (an electric submersible pump is in a normal working state) of the invention.
Fig. 2 is a schematic diagram of a high gas content well lifting column according to the present invention (high gas content is not normally produced).
Fig. 3 is a schematic diagram of the liquid-in-gas type jet pump and degassing cylinder of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings so that those skilled in the art can practice the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
In order to achieve the above object, the present invention adopts the following technical solutions.
As shown in fig. 1 to 3, in one implementation form of the present invention, to achieve the above object, the present invention adopts the following technical solutions, including:
a casing 110, in which a first production sliding sleeve 111, an insertion seal 112, a second production sliding sleeve 113, a positioning seal 114, an oil pipe 115, a canned electric submersible pump device 200, a lifting oil pipe 300 and a downhole safety valve 400 are arranged from bottom to top; an electric submersible pump 210 and a degassing working barrel 220 which are connected in sequence are arranged in the canned electric submersible pump device 200 from bottom to top; the free end of the power cable 500 extends into the canned submersible electric pump device and is electrically connected with the submersible electric pump 210; and the liquid-gas type jet pump 230 is used for discharging gas at the top end of the electric submersible pump when the gas content of produced liquid rises and the electric submersible pump cannot work normally through a steel wire in the degassing working barrel, so that the normal work of the electric submersible pump is ensured. Preferably, a diffuser 231 is provided at the upper end of the liquid-entrained-gas type jet pump, a throat 232 is provided in the diffuser, and a nozzle 233 is provided directly below the throat. As a further preferred mode, a plurality of grooves 221 are formed in the side wall of the degassing working barrel, an upper sealing module 235 and a lower sealing module 236 are respectively arranged at the middle part and the bottom part of the liquid-carrying-gas type jet pump, a lock cylinder 234 is arranged on the periphery of the diffusion pipe, and the lock cylinder 234, the upper sealing module 235 and the lower sealing module 236 are respectively matched with the grooves 221.
The high gas-containing well lifting pipe column 1 is lowered into an oil well, the gas content of the produced formation liquid is low, the degassing working barrel is in a closed state within the processing range of a conventional electric submersible pump separator, the produced formation liquid enters the canned electric pump device 200 through the first production sliding sleeve 111 and the second production sliding sleeve 113 at the lower part, a small amount of gas is separated after passing through the electric submersible pump 210 separator, and the liquid is lifted to a well head through the electric submersible pump 210, the degassing working barrel 13 and the lifting oil pipe 8. When the gas content in the produced liquid is high, the separator of the conventional electric submersible pump 210 cannot process a large amount of gas, the gas can enter the cavity of the electric submersible pump 210, the electric pump is unloaded, the effective lift of the electric pump is lowered, and the electric submersible pump 210 stops pumping, in order to prevent the phenomenon, firstly, the degassing working barrel switch 222 can be opened through the operation of a steel wire, the degassing working barrel 220 after the opening can enable the annular space on the inner part of the canned electric submersible pump device 200 to be communicated with the inside of the degassing working barrel 220, then, the liquid-carrying-gas type jet pump 230 is put into the degassing working barrel 220 through the operation of the steel wire, the lock cylinder 234, the upper sealing module 235 and the lower sealing module 236 on the liquid-carrying-gas type jet pump 230 are respectively matched with the groove 221 on the degassing working barrel 220, and the liquid-carrying-gas type jet pump 230 is prevented from moving up and down. The gas gathers in the top of the canned electric submersible pump device 200, the liquid enters the nozzle 233 of the liquid-gas type jet pump 230 through the electric submersible pump 210, the liquid is pressurized through the electric submersible pump 210, the pressure energy is converted into the fluid kinetic energy to generate high-speed fluid after the pressure of the liquid rises through the nozzle 233, negative pressure is formed at the communication position of the annular space on the inner part of the canned electric submersible pump device 200 and the inner part of the degassing working barrel 220, the gas collected at the top of the inner part of the canned electric submersible pump device 200 is sucked, the high-speed liquid and the gas are mixed at the throat 232, the kinetic energy of the liquid reduces the kinetic energy of the gas to be increased, and the kinetic energy of the mixed gas and liquid is converted into pressure energy to be lifted to the ground through the diffusion pipe 231 in the liquid-gas type jet pump 230. So as to realize the lifting of the canned electric submersible pump device 200 of the high gas-containing formation liquid.
In another embodiment, a landing sub 600 is provided between the lift tubing 300 and the downhole safety valve 400.
In another embodiment, a cable-over packer 700 is provided between the housing 110 and the landing sub 600.
In another embodiment, a diffuser 231 is provided at the upper end of the liquid-entrained-gas type jet pump, a throat 232 is provided in the diffuser, and a nozzle 233 is provided right below the throat.
In another embodiment, a plurality of grooves 221 are formed in the side wall of the degassing working cylinder, an upper sealing module 235 and a lower sealing module 236 are respectively arranged in the middle and at the bottom of the liquid-gas type jet pump, a lock cylinder 234 is arranged on the periphery of the diffusion tube, and the lock cylinder 234, the upper sealing module 235 and the lower sealing module 236 are respectively matched with the grooves 221.
In another embodiment, a degassing cylinder switch 222 which can be opened by a steel wire is arranged at the lower part of the degassing cylinder 220.
In summary, the high gas content well lifting pipe column 1 provided by the invention is provided with the degassing working cylinder 210 and the liquid-gas type jet pump 230, and can convert kinetic energy of mixed gas and liquid into pressure energy to lift to the ground, so that the canned electric submersible pump device 200 for high gas content formation liquid is lifted.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (6)
1. A high-gas-content well lifting pipe column is characterized by comprising: the device comprises a shell, wherein a first production sliding sleeve, an insertion seal, a second production sliding sleeve, a positioning seal, an oil pipe, a canned electric submersible pump device, a lifting oil pipe and an underground safety valve which are sequentially connected are arranged inside the shell from bottom to top; an electric submersible pump and a degassing working barrel which are connected in sequence are arranged in the canned electric submersible pump device from bottom to top; the free end of the power cable extends into the canned electric submersible pump device and is electrically connected with the electric submersible pump; the liquid-carrying-gas type jet pump rises in the gas content of produced liquid, and when the electric submersible pump cannot work normally, the electric submersible pump goes into the degassing working barrel through a steel wire and is used for discharging gas at the top end of the electric submersible pump, so that the normal work of the electric submersible pump is ensured.
2. The high-gas-content well lifting pipe column according to claim 1, characterized in that: and a seating joint is arranged between the lifting oil pipe and the underground safety valve.
3. The high-gas-content well lifting pipe column according to claim 2, characterized in that: and a cable packer is arranged between the shell and the seating joint.
4. High-void gas well lifting string according to claim 1 or 2, characterized in that: the upper end of the liquid-carrying-gas type jet pump is provided with a diffusion pipe, a throat pipe is arranged in the diffusion pipe, and a nozzle is arranged right below the throat pipe.
5. The high-gas-content well lifting pipe column according to claim 4, characterized in that: the side wall of the degassing working barrel is provided with a plurality of grooves, the middle part and the bottom of the liquid-band gas type jet pump are respectively provided with an upper sealing module and a lower sealing module, the periphery of the diffusion pipe is provided with a lock cylinder, and the lock cylinder, the upper sealing module and the lower sealing module are respectively matched with the grooves.
6. High-void gas well lifting string according to claim 1 or 2, characterized in that: and a degassing working barrel switch which can be opened through a steel wire is arranged at the lower part of the degassing working barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310069817.3A CN115977588A (en) | 2023-02-07 | 2023-02-07 | High-gas-content well lifting pipe column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310069817.3A CN115977588A (en) | 2023-02-07 | 2023-02-07 | High-gas-content well lifting pipe column |
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| Publication Number | Publication Date |
|---|---|
| CN115977588A true CN115977588A (en) | 2023-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310069817.3A Pending CN115977588A (en) | 2023-02-07 | 2023-02-07 | High-gas-content well lifting pipe column |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117231177A (en) * | 2023-11-14 | 2023-12-15 | 山东成林石油工程技术有限公司 | Underground pressurized jet deep liquid extraction device and use method |
-
2023
- 2023-02-07 CN CN202310069817.3A patent/CN115977588A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117231177A (en) * | 2023-11-14 | 2023-12-15 | 山东成林石油工程技术有限公司 | Underground pressurized jet deep liquid extraction device and use method |
| CN117231177B (en) * | 2023-11-14 | 2024-02-23 | 张广卿 | Underground pressurized jet deep liquid extraction device and use method |
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