CN210049855U - Natural gas well downhole choke and automatically controlled ware of dragging for - Google Patents
Natural gas well downhole choke and automatically controlled ware of dragging for Download PDFInfo
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- CN210049855U CN210049855U CN201920908538.0U CN201920908538U CN210049855U CN 210049855 U CN210049855 U CN 210049855U CN 201920908538 U CN201920908538 U CN 201920908538U CN 210049855 U CN210049855 U CN 210049855U
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Abstract
The utility model relates to an automatically controlled ware of throwing and dragging for, more specifically the underground throttle device of natural gas well and automatically controlled ware of throwing and dragging for that says so, including underground throttle device and automatically controlled ware of throwing and dragging for, be provided with gas-supply pipe, lead screw, lower sealed guide block, lower sealed packing element, anchoring voussoir, anchoring jack catch, upper sealed guide block, upper sealed packing element and salvage the neck on the underground throttle device, can pass through automatically controlled drive form, the anchoring taper sleeve that is used for tensioning anchoring jack catch and sealed packing element is as the active part, its deblocking, unblock direction of action is opposite with salvage pulling force direction, avoids long-term working silt impurity accumulation in the pit, the unblock inefficacy that the scale deposit caused; the salvage joint position is higher than the long-term work silt in the pit and piles up the long-pending husky height that leads to, avoids the sand to bury the salvage failure that the phenomenon caused, adopts dual seal structure to guarantee that the anchoring jack catch is in a clean operational environment to guarantee the motion of anchoring jack catch, guarantee that the deblocking is successful.
Description
Technical Field
The utility model relates to an automatically controlled ware of dragging for of throwing, more specifically the natural gas well is flow controller and automatically controlled ware of dragging for in pit that says so.
Background
In recent years, the demand of China for natural gas is gradually increased, and the natural gas becomes a natural gas consumption country. As a clean energy source, the demand for natural gas production has increased. In natural gas engineering, the natural gas collected underground is subjected to throttling treatment, so that the pressure and the temperature of the natural gas are reduced, and the purpose of facilitating the storage and transportation of the natural gas is achieved. The traditional throttling mode is realized at a wellhead of a gas well, natural gas and water are suddenly decompressed and cooled at the wellhead to generate harmful hydrates, inhibitors are added and heating is carried out in the conventional method, but the method is time-consuming and labor-consuming. The underground throttling process is realized by arranging a throttling device in a shaft to reduce the pressure of natural gas, and the temperature of the stratum is fully utilized to heat the natural gas after the pressure is reduced, so that the temperature of the airflow after the wellhead is throttled is basically recovered to the temperature before throttling, and the formation of hydrates is effectively inhibited.
The traditional underground natural gas well choke is fished by a pure mechanical type, and the anchoring and setting actions are realized by using the self weight of slips and the friction force of pipe walls during throwing in and by using a differential lifting mode. On one hand, when the well wall is irregular or the inclination is large, anchoring failure is easy to occur, on the other hand, differential throwing operation is complex, the requirement on experience of operators is high, and the throwing success rate is low; and the slip mechanism is lifted during fishing to realize unlocking and deblocking. The moving direction of the slips is the same as the underground accumulated sand direction, and the slips are easy to clamp sand, so that the fishing is ineffective.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a natural gas well is flow controller and automatically controlled ware of salvaging of throwing in pit can effectively solve the pipe wall scale deposit seriously, the pipeline is irregular, the pit shaft inclination is big, the flow controller under the bad operating mode such as sand seriously in the pit reliably throws the problem of salvaging.
The purpose of the utility model is realized through the following technical scheme:
a natural gas well downhole choke holder and an electric control fishing device comprise a downhole choke holder and an electric control fishing device, wherein a gas pipe, a lead screw, a lower sealing guide block, a lower sealing rubber cylinder, an anchoring wedge block, an anchoring claw, an upper sealing guide block, an upper sealing rubber cylinder and a fishing neck are arranged on the downhole choke holder, the lead screw is rotationally connected to the downhole choke holder, the lower sealing guide block, the anchoring wedge block and the upper sealing guide block are sequentially connected to the lead screw through threads from bottom to top, the lead screw rotationally pushes the lower sealing guide block to move linearly upwards to push the lower sealing rubber cylinder to expand and contact with a gas well wall to form a sealing surface, the lead screw rotationally pushes the upper sealing guide block to move linearly upwards to push the upper sealing rubber cylinder to expand and contact with the gas well wall to form a sealing surface by taking the axis of the lead screw as the center, rotationally pushes the anchoring claw to be embedded into the gas well wall by moving linearly upwards to push the anchoring, the lower extreme of throttle in the pit is provided with the gas-supply pipe of natural gas throttle in the pit gas transmission function, and the upper end of throttle in the pit is provided with the salvage neck that is used for butt joint automatically controlled ware of salvaging, salvages and is provided with the guide block on the neck.
As the further optimization of this technical scheme, the utility model relates to a natural gas well is choke ware and automatically controlled ware of salvaging, through the cooperation of the 15 wedge faces of slope between anchoring voussoir and the anchoring claw, the anchoring voussoir adopts three-jaw formula body structure.
As a further optimization of this technical scheme, the utility model relates to a natural gas well choke ware in pit and automatically controlled ware of salvaging, the choke ware in pit still includes guide cone, air intake grid and suction nozzle, and the lower extreme of choke ware in pit is provided with the guide cone, is connected with the air intake grid on the guide cone, is provided with the suction nozzle in the air intake grid and, suction nozzle and gas-supply pipe intercommunication.
As the further optimization of this technical scheme, the utility model relates to a natural gas well is flow controller and automatically controlled ware of salvaging, the suction nozzle diameter can be customized according to gas well output processing.
As the further optimization of this technical scheme, the utility model relates to a natural gas well choke ware in pit and automatically controlled ware of salvaging, the choke ware in pit is still including increasing the desilting cover of salvaging the neck height, and the desilting cover is connected at the last packing element and is salvaged between the neck.
As the further optimization of this technical scheme, the utility model relates to a natural gas well is choke ware and automatically controlled ware of salvaging out in pit, the length of sand setting cover can be adjusted according to the gas well condition of producing sand, between the length 300mm of sand setting cover to 600 mm.
As this technical scheme's further optimization, the utility model relates to a natural gas well is choke in pit with automatically controlled ware of salvaging, automatically controlled is provided with the shell fragment on the ware of salvaging and hinders the cover, salvage the card and prick, the jack catch adapter sleeve, salvage the butt joint, driving motor and motor support, motor support fixed connection is in automatically controlled ware of salvaging, driving motor fixed connection is on motor support, driving motor's output shaft fixedly connected with salvages the butt joint, the shell fragment hinders to be provided with the slide on covering, the shell fragment hinders to be connected with the salvage card and pricks, the outside of salvaging the butt joint is provided with the jack catch adapter sleeve, insert in the salvage butt joint the upper end of lead screw during the butt joint, salvage the neck and insert in the shell fragment hinders.
As a further optimization of this technical scheme, the utility model relates to a natural gas well choke ware and automatically controlled ware of salvaging of throwing in pit, automatically controlled ware of salvaging of throwing still is provided with threading board, circuit board storehouse, battery compartment and salvages the joint, and threading board fixed connection is in automatically controlled ware of throwing and salvaging, and the circuit board storehouse sets up on the threading board, and battery compartment and driving motor electricity are connected, and salvage the joint setting in the upper end of automatically controlled ware of salvaging, salvages and connects and wire rope connection.
The utility model relates to a natural gas well choke ware in pit does with automatically controlled beneficial effect of throwing and dragging for the ware:
the utility model relates to a natural gas well choke holder and automatically controlled ware of throwing and dragging for in pit, can be through automatically controlled drive form, the anchoring taper sleeve that is used for bloated tight anchoring jack catch and sealed packing element is regarded as the active part, and its deblocking, unblock direction of action is opposite with the fishing pulling force direction, avoids long-term work silt impurity accumulation in the pit, the unblock inefficacy that the scale deposit caused; the salvage joint position is higher than the long-term work silt in the pit and piles up the long-pending husky height that leads to, avoids the sand to bury the salvage failure that the phenomenon caused, adopts dual seal structure to guarantee that the anchoring jack catch is in a clean operational environment to guarantee the motion of anchoring jack catch, guarantee that the deblocking is successful.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and "upright" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected" and "connected" are to be understood in a broad sense, and may be, for example, fixedly connected, detachably connected, or integrally connected, directly connected or indirectly connected through an intermediate medium, and may be a communication between two components. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, the terms "plurality", and "a plurality" mean two or more unless otherwise specified.
FIG. 1 is a schematic structural diagram of the whole body of the underground throttle device and the electric control fishing device of the natural gas well of the utility model;
fig. 2 is a schematic structural view of a partially enlarged view of the present invention F;
FIG. 3 is a schematic view showing a partially enlarged view of the present invention D;
FIG. 4 is a schematic structural diagram of the downhole choke of the present invention;
FIG. 5 is a schematic structural diagram of a cross-sectional view of the downhole choke of the present invention;
FIG. 6 is a schematic structural view of the electric control throwing and fishing device of the utility model;
fig. 7 is a schematic structural view of a sectional view of the electric control fishing device of the utility model.
In the figure: a guide cone 1; an intake grid 2; an air inlet nozzle 3; a gas delivery pipe 4; a lead screw 5; a lower seal guide block 6; a lower sealing rubber cylinder 7; an anchoring wedge 8; an anchoring claw 9; an upper seal guide block 10; an upper sealing rubber cylinder 11; a sand settling sleeve 12; a fishing neck 13; a spring plate resistance sleeve 14; fishing and clamping 15; a claw connecting sleeve 16; fishing the butt joint 17; a drive motor 18; a motor support 19; a threading plate 20; a circuit board compartment 21; a battery compartment 22; fishing joint 23.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
the embodiment is described below with reference to fig. 1-7, and a natural gas well downhole choke and an electric control fishing device comprises a downhole choke and an electric control fishing device, wherein the downhole choke is provided with a gas pipe 4, a screw 5, a lower seal guide block 6, a lower seal rubber cylinder 7, an anchor wedge 8, an anchor jaw 9, an upper seal guide block 10, an upper seal rubber cylinder 11 and a fishing neck 13, the screw 5 is rotatably connected to the downhole choke, the lower seal guide block 6, the anchor wedge 8 and the upper seal guide block 10 are sequentially connected to the screw 5 through threads from bottom to top, the screw 5 rotates by taking the axis of the screw as the center to push the lower seal guide block 6 to move linearly upwards to extrude the lower seal rubber cylinder 7 to expand to contact with a gas well wall to form a sealing surface, the screw 5 rotates by taking the axis of the screw as the center to push the upper seal guide block 10 to move linearly upwards to extrude the upper seal rubber cylinder 11 to expand to contact with the gas well wall to form, the screw rod 5 rotates by taking the axis of the screw rod as a center to push the anchoring wedge block 8 to move upwards and linearly to extrude the anchoring claw 9 to be embedded into the wall of a gas well, the lower end of the underground throttle is provided with a gas pipe 4 with a natural gas underground throttling and gas conveying function, the upper end of the underground throttle is provided with a fishing neck 13 for butting with an electric control fishing device, and the fishing neck 13 is provided with a guide block; the driving motor 18 can be used for electrically controlling the driving mode, the anchoring wedge block 8, the lower sealing guide block 6 and the upper sealing guide block 10 are used as active components, the deblocking and unlocking directions are opposite to the direction of fishing pulling force, and deblocking failure caused by accumulation of silt impurities and scaling in long-term operation in the well is avoided; the position of the fishing joint 23 is higher than the sand accumulation height caused by the accumulation of underground long-term working silt, the fishing failure caused by the sand burying phenomenon is avoided, and the double-sealing structure of the lower sealing rubber cylinder 7 and the upper sealing rubber cylinder 11 is adopted to ensure that the anchoring claws 9 are in a clean working environment, so that the movement of the anchoring claws 9 is ensured, and the successful deblocking is ensured.
The second embodiment is as follows:
in the following, the present embodiment will be described with reference to fig. 1 to 7, the anchoring wedge 8 and the anchoring jaw 9 are engaged by a wedge surface inclined by 15 °, and the anchoring wedge 8 is of a three-jaw integrated structure.
The third concrete implementation mode:
the embodiment is described below with reference to fig. 1-7, the downhole choke further includes a guide cone 1, an air intake grid 2 and an air intake nozzle 3, the lower end of the downhole choke is provided with the guide cone 1, the guide cone 1 is connected with the air intake grid 2, the air intake grid 2 is internally provided with the air intake nozzle 3, and the air intake nozzle 3 is communicated with an air delivery pipe 4; natural gas in the shaft enters the air inlet nozzle 3 after being filtered by a filter screen arranged in the air inlet grid 2 and is discharged from an air outlet in the middle of the throttler through an overflowing hole in the air delivery pipe 4, throttling and pressure reducing work is completed, and the natural gas is exploited out of the well after being heated by the stratum.
The fourth concrete implementation mode:
the present embodiment is described below in conjunction with fig. 1-7, where the diameter of the inlet nozzle 3 may be tailored to the gas well production process.
The fifth concrete implementation mode:
the embodiment is described below with reference to fig. 1 to 7, the downhole choke further includes a sand setting sleeve 12 for increasing the height of the fishing neck 13, the sand setting sleeve 12 is connected between the upper sealing rubber sleeve 11 and the fishing neck 13, the natural conditions in the natural gas well are severe, the sand setting sleeve 12 is added, the sand soil blocked by the upper sealing rubber sleeve 11 can be gradually deposited on the sand setting sleeve 12, the length of the sand setting sleeve 12 can be adjusted according to the sand production conditions of the gas well, and can be adjusted from 300mm to 600mm, so that the fishing neck 13 can not be buried by the sand soil.
The sixth specific implementation mode:
in the embodiment described below with reference to fig. 1 to 7, the length of the sand setting sleeve 12 can be adjusted according to the sand production conditions of the gas well, and the length of the sand setting sleeve 12 is between 300mm and 600 mm.
The seventh embodiment:
the embodiment is described below with reference to fig. 1 to 7, an elastic sheet resistance sleeve 14, a fishing clamping 15, a jaw connection sleeve 16, a fishing butt joint 17, a driving motor 18 and a motor support 19 are arranged on the electric control fishing device, the motor support 19 is fixedly connected in the electric control fishing device, the driving motor 18 is fixedly connected on the motor support 19, an output shaft of the driving motor 18 is fixedly connected with the fishing butt joint 17, a slide way is arranged on the elastic sheet resistance sleeve 14, the fishing clamping 15 is connected on the elastic sheet resistance sleeve 14, the jaw connection sleeve 16 is arranged on the outer side of the fishing butt joint 17, the upper end of the screw 5 is inserted into the fishing butt joint 17 during butt joint, the fishing neck 13 is inserted into the elastic sheet resistance sleeve 14, and the fishing clamping 15 is deformed and opened under the resistance effect and then clasps the fishing neck 13.
The specific implementation mode is eight:
the embodiment is described below with reference to fig. 1 to 7, the electric control throwing and fishing device is further provided with a threading plate 20, a circuit board bin 21, a battery bin 22 and a fishing joint 23, the threading plate 20 is fixedly connected in the electric control throwing and fishing device, the circuit board bin 21 is arranged on the threading plate 20, the battery bin 22 is electrically connected with the driving motor 18, the fishing joint 23 is arranged at the upper end of the electric control throwing and fishing device, and the fishing joint 23 is connected with a steel wire rope.
The utility model discloses a natural gas well is choke ware and automatically controlled ware of dragging for of throwing in pit, its theory of operation is:
in order to ensure that the underground throttleer is smoothly lowered to a specified depth, a guide cone 1 is arranged at the bottom of the throttleer, a tool string consisting of the throttleer and an electric control throwing and fishing device is put into a gas well at the specified depth through a steel wire, a sensor in the throwing and fishing device senses that the throttleer is put in place, a driving motor 18 is started, output torque drives a screw rod 5 to rotate, a lower sealing guide block 6 is matched with a screw rod nut to move upwards and linearly to push a lower sealing rubber sleeve 7 to expand to contact with the wall of the gas well to form a sealing surface so as to block underground high-pressure natural gas, the natural gas enters an air inlet nozzle 3 through an air inlet grid 2, the diameter of the air inlet nozzle 3 can be customized according to the yield of the gas well, the underground throttling and gas conveying function of the natural gas is completed through a gas conveying pipe 4, the anchoring wedge block 8 moves upwards along with the rotation of the screw rod 5, the upper sealing rubber cylinder 11 is arranged at the upper part of the anchoring claw 9, the upper sealing guide block 10 moves upwards to extrude the upper sealing rubber cylinder 11 by utilizing the rotation of the screw 5 to form the sealing effect with the wall of the gas well, so that the sealing protection function is realized on the upper part and the lower part of the anchoring claw 9, the anchoring claw 9 is ensured to be in a clean working environment, the sand blocking phenomenon is prevented, and the anchoring working condition is finished by the throttle; the throttleer is connected with the electric control throwing and fishing device by adopting a pin, and the transmission screw rod is butted with the motor by adopting a flexible joint and provides torque; automatically controlled ware of salvaging is put into assigned position and the butt joint of throttle through the steel wire with the ware of salvaging when salvaging the throttle, the neck is salvaged to the throttle 13 design has the guide block, it hinders cover 1 and is equipped with the slide to salvage the ware, guarantee to salvage ware and throttle butt joint, salvage jack catch 2 and hold the throttle after the resistance effect warp and open and salvage neck 13 tightly, salvage butt joint 4 and the butt joint of throttle lead screw 5 simultaneously, it begins work to salvage ware driving motor 5 behind the time of predetermineeing, carry out the deblocking operation to the throttle.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or replacements made by those skilled in the art within the scope of the present invention also belong to the protection scope of the present invention.
Claims (8)
1. The utility model provides a natural gas well choke ware and automatically controlled ware of salvaging of throwing in pit, includes the choke ware in pit and automatically controlled ware of salvaging of throwing, its characterized in that: the underground throttleer is provided with a gas pipe (4), a lead screw (5), a lower sealing guide block (6), a lower sealing rubber cylinder (7), an anchoring wedge block (8), an anchoring claw (9), an upper sealing guide block (10), an upper sealing rubber cylinder (11) and a fishing neck (13), the lead screw (5) is rotatably connected to the underground throttleer, the lower sealing guide block (6), the anchoring wedge block (8) and the upper sealing guide block (10) are sequentially connected to the lead screw (5) through threads from bottom to top, the lead screw (5) rotates by taking the axis of the lead screw as the center to push the lower sealing guide block (6) to move linearly upwards to extrude the lower sealing rubber cylinder (7) to expand to contact with the wall of a gas well to form a sealing surface, the lead screw (5) rotates by taking the axis of the lead screw as the center to push the upper sealing guide block (10) to move linearly upwards to extrude the upper sealing rubber cylinder (11) to expand, the lead screw (5) rotates by taking the axis of the lead screw as the center to push the anchoring wedge block (8) to move upwards in a straight line to extrude the anchoring claw (9) to be embedded into the wall of a gas well, the lower end of the underground throttle is provided with a gas pipe (4) with a natural gas underground throttling and gas conveying function, the upper end of the underground throttle is provided with a fishing neck (13) used for butting an electric control fishing device, and the fishing neck (13) is provided with a guide block.
2. The natural gas well downhole choke and electrically controlled bailer of claim 1, wherein: the anchoring wedge block (8) is matched with the anchoring claw (9) through a wedge surface inclined by 15 degrees, and the anchoring wedge block (8) adopts a three-jaw type integrated structure.
3. The natural gas well downhole choke and electrically controlled bailer of claim 1, wherein: the underground throttleer further comprises a guide cone (1), an air inlet grid (2) and an air inlet nozzle (3), wherein the guide cone (1) is arranged at the lower end of the underground throttleer, the air inlet grid (2) is connected to the guide cone (1), the air inlet nozzle (3) is arranged in the air inlet grid (2), and the air inlet nozzle (3) is communicated with an air conveying pipe (4).
4. The natural gas well downhole choke and electrically controlled bailer of claim 3, wherein: the diameter of the air inlet nozzle (3) can be customized according to the production of the gas well.
5. The natural gas well downhole choke and electrically controlled bailer of claim 1, wherein: the underground choke further comprises a sand settling sleeve (12) for increasing the height of the fishing neck (13), and the sand settling sleeve (12) is connected between the upper sealing rubber cylinder (11) and the fishing neck (13).
6. The natural gas well downhole choke and electrically controlled bailer of claim 5, wherein: the length of the sand setting sleeve (12) can be adjusted according to the sand production condition of the gas well, and the length of the sand setting sleeve (12) is 300mm to 600 mm.
7. The natural gas well downhole choke and electrically controlled bailer according to any one of claims 1 to 6, wherein: be provided with the shell fragment on the automatically controlled ware of salvaging and hinder cover (14), salvage the card and prick (15), jack catch adapter sleeve (16), salvage butt joint (17), driving motor (18) and motor support (19), motor support (19) fixed connection is in the automatically controlled ware of salvaging, driving motor (18) fixed connection is on motor support (19), the output shaft fixedly connected with of driving motor (18) salvages butt joint (17), the shell fragment hinders and is provided with the slide on cover (14), be connected with on shell fragment hinders cover (14) and salvage the card and prick (15), the outside of salvage butt joint (17) is provided with jack catch adapter sleeve (16), insert in salvage butt joint (17) the upper end of lead screw (5) during the butt joint, salvage neck (13) insert in shell fragment hinders cover (14), salvage the card and prick (15) and hold under the resistance effect deformation and open salvage neck.
8. The natural gas well downhole choke and electrically controlled bailer of claim 7, wherein: the electric control throwing and fishing device is further provided with a threading plate (20), a circuit board bin (21), a battery bin (22) and a fishing joint (23), the threading plate (20) is fixedly connected in the electric control throwing and fishing device, the circuit board bin (21) is arranged on the threading plate (20), the battery bin (22) is electrically connected with a driving motor (18), the fishing joint (23) is arranged at the upper end of the electric control throwing and fishing device, and the fishing joint (23) is connected with a steel wire rope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920908538.0U CN210049855U (en) | 2019-06-17 | 2019-06-17 | Natural gas well downhole choke and automatically controlled ware of dragging for |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920908538.0U CN210049855U (en) | 2019-06-17 | 2019-06-17 | Natural gas well downhole choke and automatically controlled ware of dragging for |
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| CN210049855U true CN210049855U (en) | 2020-02-11 |
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| CN201920908538.0U Active CN210049855U (en) | 2019-06-17 | 2019-06-17 | Natural gas well downhole choke and automatically controlled ware of dragging for |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111305826A (en) * | 2020-04-21 | 2020-06-19 | 哈尔滨艾拓普科技有限公司 | Electric control anchoring and setting type layered pressure measuring system for oil-water well and implementation method thereof |
| CN112145112A (en) * | 2020-11-10 | 2020-12-29 | 西南石油大学 | Electric-drive labor-throwing type milling and fishing combined tool |
| CN113719258A (en) * | 2020-05-12 | 2021-11-30 | 中国石油天然气股份有限公司 | Downhole throttling method and apparatus |
-
2019
- 2019-06-17 CN CN201920908538.0U patent/CN210049855U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111305826A (en) * | 2020-04-21 | 2020-06-19 | 哈尔滨艾拓普科技有限公司 | Electric control anchoring and setting type layered pressure measuring system for oil-water well and implementation method thereof |
| CN113719258A (en) * | 2020-05-12 | 2021-11-30 | 中国石油天然气股份有限公司 | Downhole throttling method and apparatus |
| CN112145112A (en) * | 2020-11-10 | 2020-12-29 | 西南石油大学 | Electric-drive labor-throwing type milling and fishing combined tool |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A downhole choke and electric control bailer for natural gas wells Effective date of registration: 20211217 Granted publication date: 20200211 Pledgee: Harbin Kechuang Financing Guarantee Co.,Ltd. Pledgor: HARBIN AITUOPU TECHNOLOGY CO.,LTD. Registration number: Y2021230000057 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230208 Granted publication date: 20200211 Pledgee: Harbin Kechuang Financing Guarantee Co.,Ltd. Pledgor: HARBIN AITUOPU TECHNOLOGY CO.,LTD. Registration number: Y2021230000057 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |