CN201218090Y - Variable path down-hole throttling device - Google Patents
Variable path down-hole throttling device Download PDFInfo
- Publication number
- CN201218090Y CN201218090Y CNU2008201086419U CN200820108641U CN201218090Y CN 201218090 Y CN201218090 Y CN 201218090Y CN U2008201086419 U CNU2008201086419 U CN U2008201086419U CN 200820108641 U CN200820108641 U CN 200820108641U CN 201218090 Y CN201218090 Y CN 201218090Y
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- CN
- China
- Prior art keywords
- restrictor
- downhole
- gas
- nozzle sleeve
- muzzle
- 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 - Lifetime
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- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The utility model discloses a downhole restrictor with a variable diameter, and the downhole restrictor is applied to the gas production technology in the field of oil and gas. The downhole restrictor comprises a fishing head (1), a body (2), a slip insert (3), a sealing element (4), a nozzle sleeve body (5) and a nozzle sleeve (6). The downhole restrictor is characterized in that the fishing head (1) is arranged at one end of the device, the slip insert (3) is arranged on the body (2), the nozzle sleeve (6) is arranged in the nozzle sleeve body (5), the sealing element (4) is arranged between the body (2) and the nozzle sleeve body (5), and the subsequent question brought by the condition that a gas well, in which the downhole restrictor is applied, cannot be fished are effectively solved. In the design of the restrictor, the bottom part of a flow nipple is designed into an open state, a flow nipple sleeve is designed at the lower end of the downhole restrictor, the normal circulation of kill fluid and the wire line operation can cut off the pin of the flow nipple sleeve, the position of the flow nipple is changed, the interior part of the downhole restrictor is communicated with a circulation channel with the diameter of 30 mm, and the normal production of the gas well is ensured.
Description
Technical field
The utility model is a special-purpose downhole choke instrument that is applied in the gas producing technology technology of petroleum gas field, specifically, is a kind of variable latus rectum underground throttle device.
Background technology
The natural gas throttling is a step-down temperature-fall period, the ground throttling makes hydrate generate, and the generation of hydrate can cause obstruction to oil pipe, metering orifice plate and surface line etc., the conduction of heat of reduction equipment, production brings many difficulties to gas well, therefore, needs to adopt water jacket furnace that natural gas is heated before throttling and prevents that hydrate from forming, this has just increased the gas well cost of winning, has also increased the weight of administrative staff's labour intensity.Simultaneously, the switch pressure regulator valve can produce harmful excitement to gas well production, cause and produce instability, and well head and part surface line before the throttling still can bear high pressure, and still there is bigger potential safety hazard in well head.
The gas field in the aboveground enforcement downhole choke of many implications technology, relies on this technology, has reduced gas reservoir exploitation cost and management cost, has realized the benefit exploitation in gas field.At present, the downhole choke technology of chock pressure difference≤35MPa has obtained the large tracts of land popularization in the natural gas gas well.Though this technology is applied, but there are extremely indivedual gas wells, and can not salvage the problem that underground throttle device causes the gas well ordinary production because a variety of causes blocks flow nipple.
Summary of the invention
The purpose of this utility model is to provide a kind of variable latus rectum underground throttle device, under the situation that it blocks and can not salvage out based on gas well downhole choke mouth, in case need the situation of gas well kill-job well workover, can use well killing fluid direct circulation and steel wire operation, change throttling muzzle position, make the underground throttle device latus rectum become big, reach the purpose of gas well kill-job well workover.
The utility model is achieved in that and comprises fishing head 1, body 2, slip insert 3, seal 4, muzzle body 5, muzzle 6, one end of this device is equipped with fishing head 1, slip insert 3 is housed on the body 2, muzzle 6 is installed in the muzzle body 5, between body 2 and muzzle body 5, be provided with seal 4.
Advantage of the present utility model is: effectively solve gas well application underground throttle device and can not salvage the contingency question that is brought.Be the open type state with the flow nipple bottom design in the design of restriction choke, the flow nipple Analysis of Nested Design is in the underground throttle device lower end, well killing fluid direct circulation and wireline operation can overlap pin with flow nipple and cut off, the flow nipple position is changed, latus rectum obtains Φ 30mm circulation canal in the underground throttle device, guarantees the ordinary production of gas well.
Description of drawings
Accompanying drawing is a structural representation of the present utility model.
The specific embodiment
As shown in drawings, be made up of fishing head 1, body 2, slip insert 3, seal 4, muzzle body 5, muzzle 6, an end of this device is equipped with fishing head 1, and slip insert 3 is housed on the body 2, muzzle 6 is installed in the muzzle body 5, between body 2 and muzzle body 5, is provided with seal 4.
Variable latus rectum underground throttle device parameter list
| The restriction choke model | 2-7/8 " fixation type throttle device |
| Latus rectum in the flow nipple | Φ 1.5mm～Φ 20mm |
| Chock pressure difference | ≤ 70MPa |
| Minimum discharge | ＞0.1 * 10 4m 3/ d |
| The seating nipple minimum diameter | Φ 58.2mm |
| Seating nipple length | 365mm |
| The seating nipple external diameter | 95mm |
| The body maximum outside diameter | Φ 59.0mm |
| The seal maximum outside diameter of going into the well | Φ 58.2mm |
| Maximum servant's degree of depth | 4200m |
| Working media | Oil, gas, water mixed liquid contain H 2S is little, shake out on a small quantity. |
This instrument has carried out field trial in the gas field, Guangan in oil gas ore deposit in the Gas field river, realize full gas reservoir application downhole choke technology, used variable latus rectum underground throttle device especially widely, saved ground installation, shorten well construction period, obtained good economic benefit.
Claims (2)
1. variable latus rectum underground throttle device, comprise fishing head (1), body (2), slip insert (3), seal (4), muzzle body (5), muzzle (6), it is characterized in that: an end of this device is equipped with fishing head (1), slip insert (3) is housed on the body (2), muzzle (6) is installed in the muzzle body (5), between body (2) and muzzle body (5), is provided with seal (4).
2. variable latus rectum underground throttle device according to claim 1 is characterized in that: muzzle body (5) bottom shape is an open type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201086419U CN201218090Y (en) | 2008-06-04 | 2008-06-04 | Variable path down-hole throttling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201086419U CN201218090Y (en) | 2008-06-04 | 2008-06-04 | Variable path down-hole throttling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201218090Y true CN201218090Y (en) | 2009-04-08 |
Family
ID=40540926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201086419U Expired - Lifetime CN201218090Y (en) | 2008-06-04 | 2008-06-04 | Variable path down-hole throttling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201218090Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373092A (en) * | 2013-08-15 | 2015-02-25 | 中国石油天然气股份有限公司 | Underground blockage preventing flow restrictor and fishing method |
| CN108917869A (en) * | 2018-06-12 | 2018-11-30 | 中国石油天然气股份有限公司 | Fairing |
| CN109519137A (en) * | 2018-11-30 | 2019-03-26 | 四川圣诺油气工程技术服务有限公司 | A kind of downhole-choke release tool |
| CN109594956A (en) * | 2018-11-29 | 2019-04-09 | 四川圣诺油气工程技术服务有限公司 | A kind of dissolvable formula underground throttle device |
-
2008
- 2008-06-04 CN CNU2008201086419U patent/CN201218090Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373092A (en) * | 2013-08-15 | 2015-02-25 | 中国石油天然气股份有限公司 | Underground blockage preventing flow restrictor and fishing method |
| CN108917869A (en) * | 2018-06-12 | 2018-11-30 | 中国石油天然气股份有限公司 | Fairing |
| CN109594956A (en) * | 2018-11-29 | 2019-04-09 | 四川圣诺油气工程技术服务有限公司 | A kind of dissolvable formula underground throttle device |
| CN109519137A (en) * | 2018-11-30 | 2019-03-26 | 四川圣诺油气工程技术服务有限公司 | A kind of downhole-choke release tool |
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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: 20090408 |
|
| CX01 | Expiry of patent term |