CN215169918U - Self-unsealing downhole choke - Google Patents
Self-unsealing downhole choke Download PDFInfo
- Publication number
- CN215169918U CN215169918U CN202121051738.2U CN202121051738U CN215169918U CN 215169918 U CN215169918 U CN 215169918U CN 202121051738 U CN202121051738 U CN 202121051738U CN 215169918 U CN215169918 U CN 215169918U
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- China
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- ring
- slip
- cylinder
- backstop
- thread
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- Expired - Fee Related
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Abstract
The utility model discloses a self-unsealing downhole choke, which comprises a connecting rod, wherein the connecting rod is axially and sequentially sleeved with a fishing rod, a righting cylinder, a slip supporting block and a rubber cylinder; the righting cylinder is provided with a slip, the end part of the slip is connected with a slip supporting block, the rubber cylinder is positioned below the slip supporting block, and the lower end of the rubber cylinder is provided with a rubber cylinder supporting ring; the end part of the righting cylinder is provided with a backstop thread which is connected with a backstop thread ring, and a backstop ring locking cylinder is fixed on the backstop thread ring; the lower part of the connecting rod is connected with a connecting ring, and the connecting ring is connected with a lower joint. The utility model relates to a from deblocking downhole choke ware, through the slips supporting shoe, the packing element support ring, stopping screw ring three forms jointly from deblocking mechanism, and during the salvage, dissolve from deblocking mechanism, realize that the choke ware is light salvages from the deblocking, solve the problem that traditional choke ware became invalid and can't salvage in shaft bottom complex environment for a long time, improve the success rate that the choke ware was salvaged, improve tool's life greatly reduces salvage cost and risk.
Description
Technical Field
The utility model belongs to the technical field of oil and gas recovery, concretely relates to from unblock choke ware in pit.
Background
The underground throttleer is an underground tool of a gas well, at present, a large number of application situations of an oil and gas field are seen, the underground throttleer is soaked in a complex environment at the bottom of the well for a long time, because a rubber cylinder of the throttleer is nitrile rubber, the rubber cylinder cannot rebound after aging 1-2 years in the well, in addition, slips and other components are made of steel, the slips of the throttleer cannot be unlocked due to corrosion, a rubber cylinder supporting block of the throttleer cannot be normally withdrawn due to corrosion, and a stopping ring of the throttleer cannot be withdrawn due to corrosion failure of underground liquid, so that when the throttleer is salvaged, the problems of fracture of a salvage neck, fracture of the slips or slip ring, incapability of rebounding of rubber of a sealing rubber cylinder and the like occur, the yield of a single well is reduced, and liquid cannot be drained in time; so that the choke is difficult to salvage and even cannot salvage.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a from unblock choke ware in pit solves the problem that traditional choke ware became invalid and can't be salvaged in the shaft bottom complex environment for a long time.
The utility model adopts the technical proposal that: a self-unsealing downhole choke comprises a connecting rod, wherein the connecting rod is axially and sequentially sleeved with a fishing rod, a centering cylinder, a slip supporting block and a rubber cylinder; the righting cylinder is provided with a slip, the end part of the slip is connected with a slip supporting block, the rubber cylinder is positioned below the slip supporting block, and the lower end of the rubber cylinder is provided with a rubber cylinder supporting ring; the end part of the righting cylinder is provided with a backstop thread which is connected with a backstop thread ring, and a backstop ring locking cylinder is fixed on the backstop thread ring; the lower part of the connecting rod is connected with a connecting ring, and the connecting ring is connected with a lower joint.
The utility model discloses a characteristics still lie in:
the slip supporting block, the rubber cylinder supporting ring and the backstop thread ring are all made of magnesium-aluminum soluble alloy, and the surface of the made magnesium-aluminum soluble alloy is passivated to form a layer of passivation film.
The thickness of the passive film coating is not more than 50 μm.
The lower connector is connected with the screen, and the screen is connected with the screen supporting block.
The fishing rod is fixedly connected with the righting barrel through a shearing pin.
The utility model has the advantages that: the utility model relates to a from unblock choke ware in pit, through the slips supporting shoe, the packing element support ring, stopping screw thread ring three forms jointly from unblock mechanism, it can not become invalid to last to support the slips before salvaging, it can not kick-back to support the packing element, the stopping screw thread can not back off and detain, guarantee the choke ware in the pit when salvaging, dissolve from unblock mechanism, realize that the choke ware is light from unblock and salvage, the success rate that the choke ware was salvaged is improved, the life of lifting means, greatly reduce salvage cost and risk.
Drawings
Fig. 1 is a schematic perspective view of a self-unsealing downhole choke of the present invention;
fig. 2 is a schematic view of a cross-sectional structure of the self-unsealing downhole choke of the present invention.
In the figure, the fishing rod comprises a slip supporting block 1, a rubber sleeve supporting ring 2, a check ring 3, a connecting rod 4, a fishing rod 5, a righting cylinder 6, a slip 7, a rubber sleeve 8, a check thread 9, a check ring locking cylinder 10, a connecting ring 11, a lower connector 12, a screen 13 and a screen supporting block 14.
Detailed Description
The invention will be described in further detail with reference to the following detailed description and accompanying drawings:
the utility model relates to a self-unblocking downhole choke, as shown in figures 1 and 2, comprising a connecting rod 4, wherein the connecting rod 4 is axially and sequentially sleeved with a fishing rod 5, a righting cylinder 6, a slip supporting block 1 and a rubber cylinder 8; the fishing rod 5 is fixedly connected with the righting barrel 6 through a shearing pin, a slip 7 is arranged on the righting barrel 6, the end part of the slip 7 is connected with a slip supporting block 1, a rubber barrel 8 is positioned below the slip supporting block 1, and a rubber barrel supporting ring 2 is arranged at the lower end of the rubber barrel 8. The fishing rod 5 axially slides along the connecting rod 4, and the end part of the slip 7 slides along the slip supporting block 1; the connecting rod 4 is sleeved with the rubber sleeve 8, the slip supporting block 1 pushes and extrudes the rubber sleeve 8 towards the direction of the rubber sleeve supporting ring 2, the rubber sleeve 8 is axially compressed under the extrusion of the slip supporting block 1 and the support of the rubber sleeve supporting ring 2, the length of the rubber sleeve 8 is shortened, and the outer diameter is enlarged.
The end part of the righting cylinder 6 is provided with a backstop thread 9, and the backstop thread 9 is connected with the backstop thread ring 3; the retaining thread ring 3 and the retaining thread 9 can only move oppositely and can not be buckled; a retaining ring locking cylinder 10 is fixed on the retaining threaded ring 3, and the retaining threaded ring 3 is fixed on the connecting rod 4; the lower part of the connecting rod 4 is connected with a connecting ring 11, the connecting ring 11 is connected with a lower joint 12, the lower joint 12 is connected with a screen 13, and the screen 13 is connected with a screen supporting block 14.
The slip supporting block 1, the rubber sleeve supporting ring 2 and the backstop threaded ring 3 are all made of magnesium-aluminum soluble alloy, the surface of the made magnesium-aluminum soluble alloy is passivated to form a passivation film, the thickness of the pattern layer is not more than 50 mu m, the pattern layer is kept for a long time before deblocking and does not lose effectiveness, the chemical reaction is carried out between the pattern layer and fast dissolving liquid during deblocking, and magnesium-aluminum soluble alloy materials are converted from solids to liquid and are rapidly dissolved and disappear.
The utility model relates to a working principle of a self-sealing underground throttler, the top of a connecting rod 4 is connected with a central rod of an external setting tool; when the external setting tool pushes the slip 7 to be spread by pushing the righting cylinder 6, the end part of the slip 7 slides along the slip supporting block 1 to further push the rubber cylinder 8, and meanwhile, the rubber cylinder supporting ring 2 prevents the rubber cylinder 8 from moving downwards, so that the rubber cylinder 8 is compressed, the length of the rubber cylinder 8 is shortened, and the outer diameter of the rubber cylinder is enlarged; at the moment, the righting cylinder 6 pushes the retaining thread 9 to move downwards, a retaining mechanism is formed by the retaining thread ring 3, the slips 7 are supported by the slip supporting block 1, the slips 7 cannot retract after being propped open, the rubber cylinder 8 is supported by the rubber cylinder supporting ring 2, the rubber cylinder 8 cannot rebound after being compressed, the retaining thread 9 is supported by the retaining thread ring 3, the retaining thread 9 cannot be buckled, finally, the whole throttling device is completely anchored and sealed on the inner wall of a casing pipe, oil gas in a shaft enters the throttling device through the screen 13, the screen filters foreign matters such as bottom gravel, and the foreign matters are prevented from entering the throttling device to block a production channel.
The utility model relates to a from working process of unblock downhole choke ware, when the choke ware salvages construction, put down special fishing tool and grasp fishing rod 5 on the choke ware, lift the steel wire, inject into the hydrochloric acid that concentration is 5% at the pit shaft, the dose is about 5m3The slip is put above the underground throttle at a speed of 100m/min for 3-5 m, the throttle is soaked in hydrochloric acid, magnesium-aluminum soluble alloy is subjected to chemical reaction in 30 minutes when meeting hydrochloric acid, the material is converted from solid into liquid until the material is completely dissolved and disappears and no residue exists, and slips retract automatically after the slip supporting block 1 disappears; after the rubber sleeve supporting ring 2 disappears, the rubber sleeve rebounds automatically; after the retaining thread ring 3 disappears, the retaining thread automatically returns to be buckled, and the deblocking process is completed through downlink deblocking, so that the fishing tool and the throttler can be taken out.
The utility model relates to a self-unsealing downhole choke, slips supporting shoe 1, packing element supporting ring 2, stopping screw ring 3 three form self-unsealing mechanism jointly, slips supporting shoe 1, packing element supporting ring 2, stopping screw ring 3 adopt magnesium-aluminum soluble alloy, the surface is through passivation treatment, it can not become invalid to continue supporting slips 7 before salvaging, support packing element 8 can not kick-back, stopping screw can not break back; when salvaging the restrictor, the self-unsealing salvaging of the restrictor is realized, the salvaging success rate of the restrictor is improved, the pressure difference between the upper part and the lower part of the restrictor is increased, the service life of tools is prolonged, and the salvaging cost and risk are greatly reduced.
Claims (5)
1. The self-unsealing underground throttle is characterized by comprising a connecting rod (4), wherein the connecting rod (4) is axially and sequentially sleeved with a fishing rod (5), a righting cylinder (6), a slip supporting block (1) and a rubber cylinder (8); a slip (7) is arranged on the righting cylinder (6), the end part of the slip (7) is connected with a slip supporting block (1), a rubber cylinder (8) is positioned below the slip supporting block (1), and the lower end of the rubber cylinder (8) is provided with a rubber cylinder supporting ring (2); the end part of the righting cylinder (6) is provided with a backstop thread (9), the backstop thread (9) is connected with a backstop thread ring (3), and a backstop ring locking cylinder (10) is fixed on the backstop thread ring (3); the lower part of the connecting rod (4) is connected with a connecting ring (11), and the connecting ring (11) is connected with a lower joint (12).
2. The self-unsealing downhole choke holder according to claim 1, characterized in that the slip support block (1), the rubber sleeve support ring (2) and the backstop thread ring (3) are all made of magnesium-aluminum soluble alloy, and the surface of the prepared magnesium-aluminum soluble alloy is passivated to form a passivation film.
3. A self-unblocking downhole choke according to claim 2, wherein the passive film has a coating thickness of not more than 50 μm.
4. A self-unblocking downhole choke according to claim 1, characterised in that the lower nipple (12) is connected to a screen (13), the screen (13) being connected to a screen support block (14).
5. A self-unblocking downhole choke according to claim 2, characterised in that the overshot rod (5) is fastened to the centralizer (6) by means of shear pins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121051738.2U CN215169918U (en) | 2021-05-17 | 2021-05-17 | Self-unsealing downhole choke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121051738.2U CN215169918U (en) | 2021-05-17 | 2021-05-17 | Self-unsealing downhole choke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215169918U true CN215169918U (en) | 2021-12-14 |
Family
ID=79370474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121051738.2U Expired - Fee Related CN215169918U (en) | 2021-05-17 | 2021-05-17 | Self-unsealing downhole choke |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215169918U (en) |
-
2021
- 2021-05-17 CN CN202121051738.2U patent/CN215169918U/en not_active Expired - Fee Related
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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: 20211214 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |