CN201810289U - Fixed downhole choke holder - Google Patents
Fixed downhole choke holder Download PDFInfo
- Publication number
- CN201810289U CN201810289U CN2010205800373U CN201020580037U CN201810289U CN 201810289 U CN201810289 U CN 201810289U CN 2010205800373 U CN2010205800373 U CN 2010205800373U CN 201020580037 U CN201020580037 U CN 201020580037U CN 201810289 U CN201810289 U CN 201810289U
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- fixed
- urceolus
- nozzle
- central tube
- wall
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Abstract
The utility model provides a fixed downhole choke holder which is applied to the technical field of gas production in oil and gas fields. In the utility model, the upper end of an outer cylinder is connected with the lower end of a fishing head, and the lower end of the outer cylinder is fixed on the outer wall in the middle part of a central pipe; an annular space is formed between the central pipe and the outer cylinder, an inner cylinder is sheathed in the annular space, and the outer wall of the lower end of the inner cylinder is provided with an oblique plane which protrudes outwards; a rectangular clamping block is arranged in each rectangular hole; the lower end of a compression spring plate is pressed on the outer surface of the rectangular clamping block, and the upper end of the compression spring plate is fixed on the outer cylinder; a seal assembly, an upper support ring and a lower support ring are sheathed on the outer wall of the central pipe; the lower end of the central pipe is connected with a fixed sleeve; the lower end of the fixed sleeve is internally equipped with an annular nozzle cage; and a nozzle is fixed in the nozzle cage. The fixed downhole choke holder has the beneficial effects that the yield of a gas well can be controlled by throttling and pressure reduction in a mineshaft, hydrate blockage can be avoided in the mineshaft, and the safety for gas production can be improved.
Description
Technical field
The utility model relates to oil gas field production gas technology field, particularly a kind of underground throttle device,
Background technology
At present,, reach the throttling step-down in pit shaft, make full use of geothermal-warming, guarantee in pit shaft, can not form hydrate and stop up by underground throttle device is set.Underground throttle device has reduced surface line pressure, control gas well output, and cancellation ground heating and heat-insulating device not only can be saved a large amount of expenses, and simplify ground flow, has improved safety.At Sichuan oil gas field not sulfur-bearing or little, low sulfur-bearing (H
2S content＜5g/m
3) extensive use underground throttle device in the gas well, obtained good technical economic benefit and social benefit.But conventional underground throttle device can not satisfy sulfur-bearing gas field (SY/T6168-1995 regulation hydrogen sulfide content 5～30g/m
3) application, seriously restricting the application of underground throttle device.
Hydrogen sulfide has stronger corrosivity to downhole tool, the corrosion failure of hydrogen sulfide often show as by spot corrosion cause local wall thickness attenuate, pit or (with) perforation, hydrogen sulfide also can cause hydrogen blister, sulphur compound stress-corrosion cracking and the hydrogen embrittlement of steel.
The utility model content
The purpose of this utility model is: a kind of fixed underground throttle device is provided, can the throttling step-down controls gas well output in pit shaft, utilize geothermal-warming, guarantee not form in the pit shaft hydrate and stop up, improve the safety of gas production.
The technical solution adopted in the utility model is: fixed underground throttle device, mainly by fishing head, urceolus, inner core, making leaf spring, fixture block, central tube, upper support ring, black box, lower support ring, fixed cover, nozzle cage, cut off with nozzle and form, in the urceolus upper end external screw thread is arranged, the upper end of urceolus is connected the lower end of fishing head, it is characterized in that: there is internal thread the urceolus lower end, and the urceolus lower end is fixed on central tube on the outer wall of middle part; Between central tube and urceolus annular space is arranged, be with an inner core in annular space, the lower end outer wall of inner core has the taper seat of outside protrusion; On outer tube wall, be evenly distributed with slot, a rectangle fixture block is arranged in each slot; The lower end of making leaf spring is pressed on the external surface of rectangle fixture block, and the upper end of making leaf spring is fixed on the urceolus; The rectangle fixture block can slide up and down in the slot on outer tube wall, and when sliding into the bottom, the inclined-plane that fixture block outwards protrudes along the inner core lower end expands outwardly, and the seat of fixture block outer tappet at the bottom of prior lower going-into-well put on the pipe nipple.
Be with black box on the central tube outer wall.In the upper end of black box the upper support ring is arranged, there is the lower support ring lower end of black box, and upper support ring and lower support ring play the fixing seal assembly.In the central tube lower end external screw thread is arranged, the central tube lower end is connected with fixed cover, and a nozzle ring cover is arranged in the fixed cover lower end, by cutting off nozzle cage is fixed in the fixed cover; In the centre bore of nozzle cage, be fixed with a nozzle.
In order to improve sealing, the O RunddichtringO is arranged between central tube and fixed cover, between fixed cover and nozzle cage, O-ring seal is arranged.
The material that described nozzle adopts is a carbide alloy, has anti-erosion ability.
Be evenly distributed with transverse holes on the center tube wall.
Fixed underground throttle device is mainly used in middle sour gas well, is placed on the shaft bottom with the mode seat of wireline operation, plays the throttling step-down.
The beneficial effects of the utility model: the fixed underground throttle device of the utility model, can in pit shaft, the throttling step-down control gas well output, guarantee not form in the pit shaft hydrate and stop up, improve the safety of gas production.In throttling step-down in the pit shaft of low sulfur-bearing gas field, have decay resistance, reduced the risk of tool damage, simplify ground flow, further improve downhole safety.
Description of drawings
Fig. 1 is the utility model structural profile schematic diagram.
Among the figure, 1. fishing head, 2. urceolus, 3. inner core, 4. making leaf spring, 5. fixture block, 6. central tube, 7. upper support ring, 8. seal, 9. lower support ring, the 10.O RunddichtringO, 11. fixed covers, 12. O-ring seals, 13. nozzle cages, 14. cut off, 15. nozzles.
The specific embodiment
Embodiment 1: with a fixed underground throttle device is example, and the utility model is described in further detail.
Consult Fig. 1.The fixed underground throttle device of the utility model, mainly by fishing head 1, urceolus 2, inner core 3, making leaf spring 4, fixture block 5, central tube 6, upper support ring 7, black box 8, lower support ring 9, fixed cover 11, nozzle cage 13, cut off 14 and nozzle 15 form, in urceolus 2 upper ends external screw thread is arranged, the upper end of urceolus 2 is connected the lower end of fishing head 1.There is internal thread urceolus 2 lower ends, and urceolus 2 lower ends are fixed on central tube 6 on the outer wall of middle part.Between central tube 6 and urceolus 2 annular space is arranged, be with an inner core 3 in annular space, the lower end outer wall of inner core 3 has the taper seat of outside protrusion; On urceolus 2 walls, be evenly distributed with slot, a rectangle fixture block 5 is arranged in each slot.The lower end of making leaf spring 4 is pressed on the external surface of rectangle fixture block 5, and the upper end of making leaf spring 4 is fixed on the urceolus 2.
Be with black box 8 on central tube 6 outer walls.In the upper end of black box 8 upper support ring 7 is arranged, there is lower support ring 9 lower end of black box 8, in central tube 6 lower ends external screw thread is arranged, and central tube 6 lower ends are connected with fixed cover 11, and an O RunddichtringO 10 is arranged between central tube 6 and fixed cover 11.Be evenly distributed with four cross through hole on central tube 6 walls.A nozzle ring cover 13 is arranged in fixed cover 11 lower ends, two O-ring seals 12 are arranged between fixed cover 11 and nozzle cage 13.By cutting off 14 nozzle cage 13 is fixed in the fixed cover 11; In the centre bore of nozzle cage 13, be fixed with a nozzle 15.The material that nozzle 15 adopts is a carbide alloy.
Fixed underground throttle device is used for sour gas well, is placed on the shaft bottom with the mode seat of wireline operation, when the instrument that is lowered to by special use is lowered into appointed positions, and down jarring, fixture block 5 reducings, seat are placed on the seat that is lowered in advance and put on the pipe nipple.
Claims (4)
1. fixed underground throttle device, mainly by fishing head (1), urceolus (2), inner core (3), making leaf spring (4), fixture block (5), central tube (6), upper support ring (7), black box (8), lower support ring (9), fixed cover (11), nozzle cage (13), cut off (14) and nozzle (15) is formed, in urceolus (2) upper end external screw thread is arranged, the upper end of urceolus (2) is connected the lower end of fishing head (1), it is characterized in that: there is internal thread urceolus (2) lower end, and urceolus (2) lower end is fixed on central tube (6) on the outer wall of middle part; Between central tube (6) and urceolus (2) annular space is arranged, be with an inner core (3) in annular space, the lower end outer wall of inner core (3) has the taper seat of outside protrusion; On urceolus (2) wall, be evenly distributed with slot, a rectangle fixture block (5) is arranged in each slot; The lower end of making leaf spring (4) is pressed on the external surface of rectangle fixture block (5), and the upper end of making leaf spring (4) is fixed on the urceolus (2);
Be with black box (8) on central tube (6) outer wall, in the upper end of black box (8) upper support ring (7) is arranged, there is lower support ring (9) lower end of black box (8), in central tube (6) lower end external screw thread is arranged, central tube (6) lower end is connected with fixed cover (11), fixed cover (11) has a nozzle ring cover (13) in the lower end, by cutting off (14) nozzle cage (13) is fixed in the fixed cover (11); In the centre bore of nozzle cage (13), be fixed with a nozzle (15).
2. fixed underground throttle device according to claim 1 is characterized in that: between central tube (6) and fixed cover (11) O RunddichtringO (10) is arranged, between fixed cover (11) and nozzle cage (13) O-ring seal (12) is arranged.
3. fixed underground throttle device according to claim 1 is characterized in that: the material that described nozzle (15) adopts is a carbide alloy.
4. according to claim 1,2 or 3 described fixed underground throttle devices, it is characterized in that: be evenly distributed with transverse holes on central tube (6) wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205800373U CN201810289U (en) | 2010-10-22 | 2010-10-22 | Fixed downhole choke holder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205800373U CN201810289U (en) | 2010-10-22 | 2010-10-22 | Fixed downhole choke holder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201810289U true CN201810289U (en) | 2011-04-27 |
Family
ID=43893232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205800373U Expired - Lifetime CN201810289U (en) | 2010-10-22 | 2010-10-22 | Fixed downhole choke holder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201810289U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102242623A (en) * | 2011-07-08 | 2011-11-16 | 中国石油天然气股份有限公司 | Erosion-resistant downhole choke for sour gas well |
| CN103867167A (en) * | 2012-12-10 | 2014-06-18 | 中国石油天然气股份有限公司 | Downhole fixed bypass restrictor |
| CN105089581A (en) * | 2014-05-14 | 2015-11-25 | 中国石油天然气股份有限公司 | Downhole flow control device for large-tube-diameter gas well and process method |
| CN110748327A (en) * | 2019-11-15 | 2020-02-04 | 中国石油天然气股份有限公司西南油气田分公司工程技术研究院 | Fixed underground throttle |
-
2010
- 2010-10-22 CN CN2010205800373U patent/CN201810289U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102242623A (en) * | 2011-07-08 | 2011-11-16 | 中国石油天然气股份有限公司 | Erosion-resistant downhole choke for sour gas well |
| CN103867167A (en) * | 2012-12-10 | 2014-06-18 | 中国石油天然气股份有限公司 | Downhole fixed bypass restrictor |
| CN103867167B (en) * | 2012-12-10 | 2016-08-10 | 中国石油天然气股份有限公司 | Down-hole fixed pattern bypass throttle device |
| CN105089581A (en) * | 2014-05-14 | 2015-11-25 | 中国石油天然气股份有限公司 | Downhole flow control device for large-tube-diameter gas well and process method |
| CN105089581B (en) * | 2014-05-14 | 2018-08-14 | 中国石油天然气股份有限公司 | A kind of Large Diameter Pipeline gas well well flow rate controller and process |
| CN110748327A (en) * | 2019-11-15 | 2020-02-04 | 中国石油天然气股份有限公司西南油气田分公司工程技术研究院 | Fixed underground throttle |
| CN110748327B (en) * | 2019-11-15 | 2020-08-18 | 中国石油天然气股份有限公司西南油气田分公司工程技术研究院 | Fixed underground throttle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110427 |
|
| CX01 | Expiry of patent term |