CN210105821U - Wellhead device for intermittent gas lift liquid drainage and gas production assisted by plunger - Google Patents
Wellhead device for intermittent gas lift liquid drainage and gas production assisted by plunger Download PDFInfo
- Publication number
- CN210105821U CN210105821U CN201921028985.3U CN201921028985U CN210105821U CN 210105821 U CN210105821 U CN 210105821U CN 201921028985 U CN201921028985 U CN 201921028985U CN 210105821 U CN210105821 U CN 210105821U
- Authority
- CN
- China
- Prior art keywords
- way
- pipe
- small
- plunger
- gas
- 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.)
- Expired - Fee Related
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 125
- 239000007788 liquid Substances 0.000 title claims description 19
- 230000000712 assembly Effects 0.000 claims abstract description 10
- 238000000429 assembly Methods 0.000 claims abstract description 10
- 238000002347 injection Methods 0.000 claims description 29
- 239000007924 injection Substances 0.000 claims description 29
- 238000001514 detection method Methods 0.000 claims description 21
- 238000011144 upstream manufacturing Methods 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 105
- 238000004891 communication Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 239000012528 membrane Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 241000521257 Hydrops Species 0.000 description 1
- 206010030113 Oedema Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The utility model discloses a well head device of supplementary intermittent type gas lift flowing back gas production of plunger, the device includes: the plunger lubricator comprises a large four-way, two side wing assemblies, a small four-way, two side wing assemblies, a plunger lubricator body and a plurality of connecting pipes; the large four-way and the two side wing assemblies are connected with the small four-way and the two side wing assemblies through connecting pipes, and the small four-way and the two side wing assemblies are connected with the plunger lubricator and the plunger lubricator assemblies through connecting pipes; the device is reasonable in structural design, the injection-production linkage control problem is considered in the structure of the device, and the structure of the device can adapt to the complex production condition of the gas well.
Description
Technical Field
The utility model relates to an oil gas field exploitation well head equips technical field, specifically, relates to a well head device of supplementary intermittent type gas lift flowing back gas production of plunger.
Background
The plunger-assisted intermittent gas lift liquid drainage gas production is an upgraded liquid drainage gas production mode for intermittent gas lift liquid drainage gas production, and is suitable for low-yield low-pressure gas production wells. Along with the exhaustion of gas well energy, the gas well can not rely on this well gas energy to carry the stratum production liquid out of the pit shaft, needs increase pit shaft gas energy through the annular gas injection of oil jacket this moment, and then lifts the pit shaft hydrops to well head ground. Through the plunger is supplementary, because the physics separation effect of plunger has avoided the slippage loss between the interior gas-liquid of oil pipe, can effectively improve intermittent type gas lift efficiency. At present, a plunger blow-off pipe is generally and directly added to a conventional gas production tree in a well head device for plunger assisted intermittent gas lift liquid drainage gas production, the injection and production linkage control problem and the treatment problem under the complex production condition of a gas well cannot be well considered, and the well head device for plunger assisted intermittent gas lift liquid drainage gas production has the problem of unreasonable structural design.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem among the prior art, the utility model provides a supplementary intermittent type gas lift flowing back gas production well head device of plunger, the utility model provides a supplementary clearance gas lift flowing back gas production well head device structural design is reasonable.
In order to realize the purpose of the utility model, the application provides a well head device for plunger assisted intermittent gas lift liquid drainage and gas production, which can meet the control requirement of an injection-production linkage well head in the normal production process; on the other hand, the requirement of well mouth control on complex condition processing of the gas well can be met under the condition of no need of well mouth transformation operation.
The wellhead assembly includes:
the plunger lubricator comprises a large four-way, two side wing assemblies, a small four-way, two side wing assemblies, a plunger lubricator body and a plurality of connecting pipes;
the right end of the large four-way is connected with one end of a right side pipe of the large four-way, and the other end of the right side pipe of the large four-way is communicated with an upstream pipe network for air supply; the upper end of the large four-way is connected with the lower end of the small four-way through a connecting pipe; the left end of the large four-way is connected with one end of a left side pipe of the large four-way, and the other end of the left side pipe of the large four-way is provided with a first detachable plug; the lower end of the large four-way is communicated with a casing head, and the left side pipe of the large four-way is communicated with the left side pipe of the small four-way through a connecting pipe;
the right end of the small four-way is connected with one end of a right side pipe of the small four-way, and the other end of the right side pipe of the small four-way is provided with a second detachable plug; the upper end of the small four-way is communicated with the lower end of the plunger lubricator; the left end of the small four-way is connected with one end of a left side pipe of the small four-way, and the other end of the left side pipe of the small four-way is a produced gas outlet; the left end of the plunger lubricator is communicated with the left side pipe of the small cross joint through a connecting pipe.
Wherein, install in proper order along the upper reaches pipe network transmission direction that comes gas in the big cross right side intraductal: the system comprises a second upstream gas injection pressure detection sensor, a second gas injection regulating valve, a first gas injection film control valve, a first casing pressure detection sensor and a first wellhead casing production control valve; the left side of the large cross pipe is internally provided with: a third wellhead casing production control valve and a film control valve control an air source air intake; a fourth main control production control valve is arranged in a connecting pipe between the upper end of the large four-way joint and the lower end of the small four-way joint, and a fifth large four-way side wing is arranged in a connecting pipe between the left side pipe of the large four-way joint and the left side pipe of the small four-way joint and is communicated with the production control valve of the small four-way side wing of the gas production tree; install from right side to left side in the little cross left side intraductal in proper order: a sixth oil pipe production control valve, a third oil pipe pressure detection sensor, a second oil pipe production film control valve, a seventh gas well production control valve and a fourth production back pressure detection sensor; an eighth oil pipe production control valve is arranged in the right side pipe of the small four-way joint; and a ninth lubricator side wing oil pipe production control valve is arranged in a connecting pipe between the left end of the three ends of the plunger lubricator and the left side pipe of the small four-way valve, and a plunger arrival sensor is arranged at the upper end of the three ends of the plunger lubricator.
The two ends of a connecting pipe between the large four-way left side pipe and the small four-way left side pipe are respectively in electric welding connection with the large four-way left side pipe and the small four-way left side pipe; a connecting pipe between the left end of the plunger lubricator and the left side pipe of the small cross is in electric welding connection with the left side pipe of the small cross; the lower end of the three ends of the plunger lubricator is connected with the upper end flange of the small cross; the lower end of the small four-way is connected with the upper end flange of the large four-way; the lower end of the large cross is connected with a flange of the casing head.
The working process of the device is operated as follows:
1) when supplementary intermittent type gas lift production of normal plunger, sleeve pipe production control valve #3 normally opens, sleeve pipe production control valve #1 normally opens, gas injection regulating valve #2 normally opens, gas well main control production control valve # 4 normally opens, big cross flank and the little cross flank intercommunication production control valve #5 of gas production tree normally close, gas well production control valve # 7 normally opens, oil pipe production control valve # 6 normally closes, oil pipe production control valve # 8 normally closes, lubricator flank oil pipe production control valve #9 normally opens.
2) When the normal plunger assists in intermittent gas lift production, the controller is used for controlling the opening and closing states of the oil pipe production film control valve and the sleeve gas injection film control valve, ① the oil pipe production film control valve and the sleeve gas injection film control valve are opened in sequence when the well closing working state is switched to the gas lift working state, ② the oil pipe production film control valve is kept open and the sleeve gas injection film control valve is closed when the gas lift working state is switched to the self-blowing working state, and ② the sleeve gas injection film control valve is kept closed and the oil pipe production film control valve is closed when the self-blowing working state is switched to the well closing working state.
3) A casing pressure detection sensor #1 detects the pressure of an oil casing ring empty position at a wellhead in real time; an upstream gas injection pressure detection sensor #2 detects the upstream gas injection pressure in real time; a production return pressure detection sensor # 4 detects the return pressure formed by the gas production technology pipe network system at the wellhead in real time; an oil pipe pressure detection sensor #3 detects the oil pipe production pressure at the wellhead in real time; and the plunger arrival sensor detects whether the plunger in the oil pipe is in the blowout pipe in real time. The time detection parameters of the sensors are transmitted to a wellhead control system for real-time processing.
4) The membrane control valve controls the air intake of the air source sleeve, obtains the natural gas for control from the sleeve, and then is connected to the membrane control valve through the pressure reducing valve, the separator, the filter and the electromagnetic valve. The control system controls the opening of the oil pipe production film control valve and the sleeve gas injection film control valve by controlling the opening of the electromagnetic valve.
5) When the pressure of the casing pipe of the gas well needs to be reduced, the gas injection adjusting valve #2 can be closed, the large four-way side wing and the production control valve #5 communicated with the small four-way side wing of the gas production tree are opened, and high-pressure casing gas can be released to a ground production pipe network for depressurization.
6) When the gas injection of the high-pressure gas lift compressor of the wellhead is needed, the large four-way flank plug #1 and the small four-way flank plug #2 of the gas production tree can be respectively disassembled according to the positive and negative circulation gas injection requirements, and then the outlet of the high-pressure gas lift compressor of the wellhead is connected through the flange, so that the positive and negative circulation gas injection requirements are realized.
7) When the small four-way joint of the gas production tree needs to be disassembled, the main control production control valve # 4 of the gas well and the wellhead casing production control valve #3 of the gas well can be closed, and then relevant operations are carried out.
8) When the plunger blowout pipe needs to be disassembled, the main control production control valve # 4 of the gas well can be closed, and relevant operations are carried out after the production control valve # 6 of the lateral wing oil pipe of the gas production tree is closed
One or more technical solutions provided by the present application have at least the following technical effects or advantages:
the device is reasonable in structural design, the injection-production linkage control problem is considered in the structure of the device, and the structure of the device can adapt to the complex production condition of the gas well.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention;
FIG. 1 is a schematic illustration of a wellhead assembly for plunger assisted intermittent gas lift liquid drainage gas production according to the present application;
wherein, a is a big four-way and two side wing components, b is a small four-way and two side wing components, c is a plunger lubricator and component, 1 is an upstream gas injection pressure detection sensor #2, 2 is a gas injection adjusting valve #2, 3 is a gas injection film control valve # 1, 4 is a sleeve pressure detection sensor #1, 5 is a wellhead sleeve production control valve # 1, 6 is a wellhead sleeve production control valve # 3, 7 is a film control valve control gas source gas taking port, 8 is a detachable plug #1, 9 is a main control production control valve # 4, 10 is a big four-way flank communicated with a gas production tree small four-way flank and is a production control valve # 5, 11 is a production back pressure detection sensor # 4, 12 is a gas well production control valve # 7, 13 is an oil pipe production film control valve #2, 14-oil pipe pressure detection sensor #3, 15-oil pipe production control valve # 6, 16-oil pipe production control valve # 8, 17-detachable plug #2, 18-lubricator side wing oil pipe production control valve #9, 19-plunger arrival sensor.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflicting with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and the scope of the present invention is not limited by the specific embodiments disclosed below.
Referring to fig. 1, a wellhead assembly for intermittent gas lift liquid drainage and gas production assisted by a plunger comprises: a large four-way and two side wing assemblies-a, a small four-way and two side wing assemblies-b, a plunger lubricator and an assembly-c.
1) The gas injection side in two flanks of the big cross is provided with a wellhead casing production control valve #1 (function: isolating communication between the wellhead oil casing annulus and the outside so as to perform pipeline operation of the flank under the condition that the casing is pressurized); a casing pressure detection sensor #1 (for detecting the pressure of the empty part of the oil casing ring at the wellhead); a gas injection film control valve #1 (for automatically controlling the on-off state of gas lift gas injection by a controller); an air injection regulating valve #2 (for controlling the amount of injected air); an upstream injection gas pressure detection sensor #2 (function: detect upstream injection gas pressure).
2) The other side of two flanks of big cross is equipped with well head sleeve pipe production control valve #3 (effect: isolating communication between the wellhead oil casing annulus and the outside so as to perform pipeline operation of the flank under the condition that the casing is pressurized); the membrane control valve controls the air intake of the air source sleeve (the function is that natural gas for control is obtained from the sleeve and then is accessed into the membrane control valve through a pressure reducing valve, a separator, a filter and an electromagnetic valve); a tee joint connected with the lateral wing of the gas production tree (function: the casing gas can enter the oil pipe or the production flow through the tee joint); plug #1 (for plugging the side wing, when the vehicle-mounted high-pressure air source needs to be externally connected, the plug #1 can be disassembled, so that the vehicle-mounted high-pressure air source is connected)
3) The upper part of the large four-way joint is connected with a main control production control valve # 4 of the gas well (action: isolating the communication of the downhole tubing and the wellhead gas production tree for gas production tree operation under tubing pressure).
4) The big four-way flank and the small four-way flank of the gas production tree are communicated with a production control valve #5 (action: the communication state of the big four-way flank and the small four-way flank of the gas production tree is controlled, the big four-way flank is closed under the general condition, and the big four-way flank is opened when special treatment is needed).
5) The production side in the two flanks of the small four-way of the gas production tree is provided with an oil pipe production control valve #6 (action: isolating the communication between the wellhead tubing and the outside so as to carry out pipeline operation of the flank under the condition that the tubing is pressurized); a tee joint connected with the lubricator (the function is that the production gas of the lubricator passes through the tee joint and enters the lateral wing of the gas production tree so as to enter the ground production flow); an oil pipe pressure detection sensor #3 (for detecting the pressure of the oil pipe at the wellhead); an oil pipe production film control valve #2 (function: the on-off state of the oil pipe production is automatically controlled by a controller); a tee joint connected with the side wing of the large four-way joint (the function is that sleeve gas can enter an oil pipe or a production flow through the tee joint); a gas well production control valve #7 (for controlling the yield of the gas well to the ground production flow); and a production return pressure detection sensor #4 (for detecting the return pressure generated by the ground production flow at the wellhead).
6) The other side of the two side wings of the small four-way joint of the gas production tree is provided with an oil pipe production control valve #8 (action: isolating the communication between the wellhead tubing and the outside so as to carry out pipeline operation of the flank under the condition that the tubing is pressurized); plug #2 (for plugging the side wing, when the well head is required to produce, the plug #2 can be disassembled, and the well head blowout manifold is connected to the well head for producing.)
7) The plunger blow-off pipe is connected with a flange at the top of the small four-way joint of the gas production tree, and an oil pipe production control valve #9 (action: isolating the communication between the wellhead oil pipe and the outside so as to carry out pipeline operation of the side wing under the condition that the oil pipe is pressurized; normal opening of a gas well in its production); the tee joint is connected with the lateral wing of the small four-way of the gas production tree (the function is that the gas produced by the blow-off pipe enters the lateral wing of the small four-way of the gas production tree through the tee joint and is produced to the ground production flow); the plunger reaches the sensor (function: detect whether the lifting plunger in the oil pipe is at the well head).
While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. A wellhead assembly for plunger assisted intermittent gas lift liquid discharge gas production, the assembly comprising:
the plunger lubricator comprises a large four-way, two side wing assemblies, a small four-way, two side wing assemblies, a plunger lubricator body and a plurality of connecting pipes;
the right end of the large four-way is connected with one end of a right side pipe of the large four-way, and the other end of the right side pipe of the large four-way is communicated with an upstream pipe network for air supply; the upper end of the large four-way is connected with the lower end of the small four-way through a connecting pipe; the left end of the large four-way is connected with one end of a left side pipe of the large four-way, and the other end of the left side pipe of the large four-way is provided with a first detachable plug; the lower end of the large four-way is communicated with a casing head, and the left side pipe of the large four-way is communicated with the left side pipe of the small four-way through a connecting pipe;
the right end of the small four-way is connected with one end of a right side pipe of the small four-way, and the other end of the right side pipe of the small four-way is provided with a second detachable plug; the upper end of the small four-way is communicated with the lower end of the plunger lubricator; the left end of the small four-way is connected with one end of a left side pipe of the small four-way, and the other end of the left side pipe of the small four-way is a produced gas outlet; the left end of the plunger lubricator is communicated with the left side pipe of the small cross joint through a connecting pipe.
2. The wellhead assembly for intermittent gas lift liquid drainage and gas production assisted by plunger of claim 1,
the big cross-joint right side pipe is internally provided with a gas inlet transmission device along an upstream pipe network in sequence: the system comprises a second upstream gas injection pressure detection sensor, a second gas injection regulating valve, a first gas injection film control valve, a first casing pressure detection sensor and a first wellhead casing production control valve; the left side of the large cross pipe is internally provided with: a third wellhead casing production control valve and a film control valve control an air source air intake; a fourth main control production control valve is arranged in a connecting pipe between the upper end of the large four-way joint and the lower end of the small four-way joint, and a fifth large four-way side wing is arranged in a connecting pipe between the left side pipe of the large four-way joint and the left side pipe of the small four-way joint and is communicated with the production control valve of the small four-way side wing of the gas production tree; install from right side to left side in the little cross left side intraductal in proper order: a sixth oil pipe production control valve, a third oil pipe pressure detection sensor, a second oil pipe production film control valve, a seventh gas well production control valve and a fourth production back pressure detection sensor; an eighth oil pipe production control valve is arranged in the right side pipe of the small four-way joint; and a ninth lubricator side wing oil pipe production control valve is arranged in a connecting pipe between the left end of the three ends of the plunger lubricator and the left side pipe of the small four-way valve, and a plunger arrival sensor is arranged at the upper end of the three ends of the plunger lubricator.
3. The wellhead assembly for intermittent gas lift liquid drainage and gas production assisted by the plunger as claimed in claim 1, wherein two ends of the connecting pipe between the large four-way left pipe and the small four-way left pipe are respectively connected with the large four-way left pipe and the small four-way left pipe in an electric welding manner.
4. The wellhead assembly for intermittent gas lift liquid drainage and gas production assisted by the plunger as claimed in claim 1, wherein a connecting pipe between the left end of the three ends of the plunger lubricator and the left side pipe of the small cross is in electric welding connection with the left side pipe of the small cross.
5. The wellhead assembly for intermittent gas lift liquid drainage and gas production assisted by the plunger as claimed in claim 1, wherein the lower end of the three ends of the plunger lubricator is connected with the upper end flange of the small cross.
6. The wellhead assembly for intermittent gas lift liquid drainage and gas production assisted by a plunger as claimed in claim 1, wherein the lower end of the small cross is connected with the upper end flange of the large cross.
7. The wellhead assembly for intermittent gas lift liquid drainage and gas production assisted by a plunger as claimed in claim 1, wherein the lower end of the large cross is flanged with the casing head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921028985.3U CN210105821U (en) | 2019-07-03 | 2019-07-03 | Wellhead device for intermittent gas lift liquid drainage and gas production assisted by plunger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921028985.3U CN210105821U (en) | 2019-07-03 | 2019-07-03 | Wellhead device for intermittent gas lift liquid drainage and gas production assisted by plunger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210105821U true CN210105821U (en) | 2020-02-21 |
Family
ID=69566561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921028985.3U Expired - Fee Related CN210105821U (en) | 2019-07-03 | 2019-07-03 | Wellhead device for intermittent gas lift liquid drainage and gas production assisted by plunger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210105821U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111594087A (en) * | 2020-06-03 | 2020-08-28 | 中国石油天然气股份有限公司 | Wellhead device suitable for plunger gas lift drainage gas production and operation method thereof |
-
2019
- 2019-07-03 CN CN201921028985.3U patent/CN210105821U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111594087A (en) * | 2020-06-03 | 2020-08-28 | 中国石油天然气股份有限公司 | Wellhead device suitable for plunger gas lift drainage gas production and operation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN200971772Y (en) | Relay plunger gas-life oil or gas production device | |
| CN201963276U (en) | Device for pressurized gas lift water pumping gas production | |
| CN206636850U (en) | Compression type garbage truck back door opens and closes hydraulic system | |
| CN111042772A (en) | Inter-well series connection drainage gas recovery device and drainage gas recovery method | |
| CN210105821U (en) | Wellhead device for intermittent gas lift liquid drainage and gas production assisted by plunger | |
| CN203463092U (en) | Novel manifold truck/pry with self-pressurization perfusion function for industrial large-scale fracturing | |
| CN207073162U (en) | Pipe valve combined system after a kind of high-lift booster station pump | |
| CN106014349A (en) | Negative pressure suction water drainage and gas production device | |
| CN210317259U (en) | Gas lift device suitable for gas well full life cycle drainage gas production | |
| CN110219610B (en) | Shale gas horizontal well high-pressure pumping bridge plug device | |
| CN218759835U (en) | Annulus space intelligent control synergistic device | |
| CN214499592U (en) | Two-way speed governing hydraulic pressure valves | |
| CN210660036U (en) | Safety operation system for inert gas pumping wellhead combustible gas | |
| CN210798899U (en) | Shale gas horizontal well high pressure pumping bridging plug device | |
| CN201747554U (en) | Integrated parallel-series multifunctional dewatering unit | |
| CN205315292U (en) | Lightweight is jet from inhaling device for pump | |
| CN209025631U (en) | A kind of oil drilling intelligent integration formula runner conversion equipment | |
| CN210422597U (en) | Pressure test nipple | |
| CN208830990U (en) | A kind of rotary digging driller mast control device | |
| CN116066006A (en) | Plunger negative pressure gas production device and gas production method | |
| CN204717666U (en) | A kind of steam boiler water supply system | |
| CN208380547U (en) | Wellhead assembly is opened between gas well automation | |
| CN203441453U (en) | Small-sized automatic oil-well casing gas pressurization conveying skid | |
| CN207960673U (en) | A kind of more pressure adaptive jet stream pump assemblies | |
| CN202810933U (en) | Downward drilling drainage system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200221 |