CN2732993Y - Downhole choke for gas well - Google Patents
Downhole choke for gas well Download PDFInfo
- Publication number
- CN2732993Y CN2732993Y CN 200420074767 CN200420074767U CN2732993Y CN 2732993 Y CN2732993 Y CN 2732993Y CN 200420074767 CN200420074767 CN 200420074767 CN 200420074767 U CN200420074767 U CN 200420074767U CN 2732993 Y CN2732993 Y CN 2732993Y
- Authority
- CN
- China
- Prior art keywords
- fishing
- mandrel
- connector
- cam
- sealing
- 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
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Abstract
The utility model discloses a downhole throttling device for the gas well, comprising a downhole clamping and fixing device, the self-fishing cam clamping-fixing device, a self-sealing mechanism, a mechanical sealing mechanism, and a throttling orifice. The whole mechanism integrates the clamping, the fixing, the fishing, the sealing and the throttling. The upper part of the cam clamping-fixing device is provided with a big shear pin and a fishing head. The self-sealing mechanism is provided with a small shear pin. The throttling orifice is installed in the upper fishing head. The whole structure realizes the clamping and the fixing of the cam, the self-sealing sealing, the pneumatic mechanical sealing, and the free fishing with a steel cable in the oil pipe through shearing the shear pins in different diameter.
Description
Technical field
The utility model relates to a kind of gas well underground throttle device, belongs to down-hole gas production instrument.
Technical background
In oil gas field for step-down, throttling, limited production, often underground throttle device to be installed in the gas well down-hole, gas well underground throttle device commonly used at present, as shown in Figure 1, it is mainly by slips assembly A, the gentle nozzle assembly C of self sealss assembly B and mechanical seal three parts are formed, the fixed form of its down-hole depends on the effect of slips fully, slips very easily causes pipeline damage, quickens oil pipe and damages, simultaneously, this device is long-term fastening in the down-hole, slips and oil pipe rust are dead, cause difficulty to salvaging, even can't salvage, must carry out underground work, so just influence gas well production and increased cost of production.
Summary of the invention
The purpose of this utility model is exactly the shortcoming that overcomes prior art, and a kind of novel gas well underground throttle device is provided.
The purpose of this utility model is achieved in that novel gas well underground throttle device is by delivering 1, top connection 3, valve 4, anti-sandpipe 5, mechanical seal leather cup 6, supporting 7, last air inlet 8, link mandrel 9, self sealss 11, sheath 12, connector 13, following air inlet 14, fishing bell 15, fishing head 16, cam 18, mandrel 19, spring 20 is formed, delivering 1 is connected by pin 2 with top connection 3, valve 4 is loaded in the top connection 3 with anti-sandpipe 5, link mandrel 9 is connected with top connection 3, mechanical seal leather cup 6 is connected on the link mandrel 9, supporting 7 can be free to slide on link mandrel 9, have air inlet 8 on the link mandrel 9, sheath 12 is connected with link mandrel 9, self sealss 11 are connected with connector 13, sheath 12 is connected by pin 10 with self sealss 11, have down air inlet 14 on the connector 13, fishing bell 15 is connected on the connector 13, connector 13 is connected by pin 17 with fishing head 16, and fishing head 16 is stuck in the opening part of cam 18 by mandrel 19 and spring 20.
The utlity model has following advantage: it is convenient 1, to deliver, and only need cut off little pin and get final product; 2, cam fastening flexibility and reliability and do not injure oil pipe; 3, self sealss and mechanical seal are used, and sealing is reliable; 4, device inside is provided with salvaging mechanism, only need cut off big pin and can realize salvaging.
Description of drawings
Fig. 1: existing underground throttle device structural representation; Fig. 2: the utility model structural representation;
Fig. 3: the utility model working state schematic representation;
The specific embodiment
As shown in Figure 2, novel gas well underground throttle device by deliver 1, pin 2, top connection 3, valve 4, anti-sandpipe 5, mechanical seal leather cup 6, supporting 7, go up air inlet 8, link mandrel 9, pin 10, self sealss 11, sheath 12, connector 13, air inlet 14, fishing bell 15, fishing head 16, pin 17, cam 18, mandrel 19, spring 20 are formed down.Delivering 1 is connected by pin 2 with top connection 3, valve 4 is loaded in the top connection 3 with anti-sandpipe 5, link mandrel 9 is connected with top connection 3, mechanical seal leather cup 6 is connected on the link mandrel 9, supporting 7 can be free to slide on link mandrel 9, have air inlet 8 on the link mandrel 9, sheath 12 is connected with link mandrel 9, self sealss 11 are connected with connector 13, sheath 12 is connected by pin 10 with self sealss 11, has down air inlet 14 on the connector 13, and fishing bell 15 is connected on the connector 13, connector 13 is connected by pin 17 with fishing head 16, and fishing head 16 is stuck in the opening part of cam 18 by mandrel 19 and spring 20.
During use, at first with down-hole fastener 21 G.I.Hs, as shown in Figure 3, connect jar with steel wire again and deliver 1 with downhole choke device G.I.H together, with disconnected pin 2 of jar shake and pin 10, link mandrel 9 moves down, the delivery instrument can be proposed, and self sealss recover nature distending state, are close to tubing wall, under the effect of mine gas pressure and valve 4 throttlings, underground throttle device moves on the whole, when moving to a box cupling, cam fastener 18 snaps in the box cupling place, and whole device moves on no longer, equally under the effect of the throttling of mine gas pressure and valve 4, gas enters supporting 7 cavity of resorptions through last air inlet 8, acts in the supporting 7, makes in the supporting 7 and moves, enter mechanical seal leather cup 6, mechanical seal begins effect, has guaranteed the reliability of sealing, thereby realizes downhole choke.Only need shake disconnected pin 17 during salvaging, fishing head 16 enters fishing bell 15, on fishing head and 18 disengagings of cam fastener when carrying, cam fastener 18 automatic drawing backs, device propose to find out thus outside the well, this device can free and relaxed delivery and salvaging, and sealing is reliable, realizes the gas well downhole choke.
Claims (1)
1, a kind of novel gas well underground throttle device, it is characterized in that: it is by delivering head (1), top connection (3), valve (4), anti-sandpipe (5), mechanical seal leather cup (6), supporting (7), last air inlet (8), link mandrel (9), self sealss (11), sheath (12), connector (13), following air inlet (14), fishing bell (15), fishing head (16), cam (18), mandrel (19), spring (20) is formed, delivering head (1) is connected by pin (2) with top connection (3), valve (4) is loaded in the top connection (3) with anti-sandpipe (5), link mandrel (9) is connected with top connection (3), mechanical seal leather cup (6) is connected on the link mandrel (9), supporting (7) can be free to slide on link mandrel (9), have air inlet (8) on the link mandrel (9), sheath (12) is connected with link mandrel (9), self sealss (11) are connected with connector (13), sheath (12) is connected by pin (10) with self sealss (11), have down air inlet (14) on the connector (13), fishing bell (15) is connected on the connector (13), connector (13) is connected by pin (17) with fishing head (16), and fishing head (16) is stuck in the opening part of cam (18) by mandrel (19) and spring (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420074767 CN2732993Y (en) | 2004-09-24 | 2004-09-24 | Downhole choke for gas well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420074767 CN2732993Y (en) | 2004-09-24 | 2004-09-24 | Downhole choke for gas well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2732993Y true CN2732993Y (en) | 2005-10-12 |
Family
ID=35068834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420074767 Expired - Fee Related CN2732993Y (en) | 2004-09-24 | 2004-09-24 | Downhole choke for gas well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2732993Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892823A (en) * | 2010-02-25 | 2010-11-24 | 中国石油天然气股份有限公司 | Method for throwing and fishing out underground restrictor from gas well without utilizing steel wires |
-
2004
- 2004-09-24 CN CN 200420074767 patent/CN2732993Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892823A (en) * | 2010-02-25 | 2010-11-24 | 中国石油天然气股份有限公司 | Method for throwing and fishing out underground restrictor from gas well without utilizing steel wires |
| CN101892823B (en) * | 2010-02-25 | 2013-02-20 | 中国石油天然气股份有限公司 | Method for throwing and fishing out underground restrictor from gas well without utilizing steel wires |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |