CN202900204U - Downhole throttle device for coiled tubing - Google Patents
Downhole throttle device for coiled tubing Download PDFInfo
- Publication number
- CN202900204U CN202900204U CN 201220420627 CN201220420627U CN202900204U CN 202900204 U CN202900204 U CN 202900204U CN 201220420627 CN201220420627 CN 201220420627 CN 201220420627 U CN201220420627 U CN 201220420627U CN 202900204 U CN202900204 U CN 202900204U
- Authority
- CN
- China
- Prior art keywords
- throttle device
- coiled tubing
- protective jacket
- slips
- restriction choke
- 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 throttle device for coiled tubing. The downhole throttle device for the coiled tubing is designed for solving the problems of complex construction procedures of the throttle device and the coiled tubing and high cost and the like. An upper slips protective jacket of the throttle device is connected with a lower slips protective jacket of the throttle device, and the upper slips protective jacket and the lower slips protective jacket are both arranged on the coiled tubing in a sleeved mode. A slips and a tilting fillet are connected in the upper slips protective jacket and the lower slips protective jacket, wherein the slips and the tilting fillet are arranged on the coiled tubing in a sleeved mode. A blocking hood catch and a blocking hood seal ring are arranged on the outer wall of the lower portion of the lower slips protective jacket. The blocking hood catch is buckled with a blocking hood. A throttle device seat is arranged on the ring surface of the bottom end of the lower slips protective jacket, and the throttle device is arranged on the throttle device seat. The throttle device seal ring is arranged on the outer wall of the throttle device. The construction is carried out by combining the downhole throttle device for the coiled tubing and the coiled tubing, the purpose of getting into a well at one time can be achieved, construction procedures can be simplified, construction cost is saved, and operation safety hazards are reduced. According to the demand of production, the throttle device can be destroyed by building pressure, blanking tubing production is adopted, and the downhole throttle device for the coiled tubing has the advantages of being simple in structure, easy to machine, low in cost and convenient to operate and the like.
Description
Technical field
The utility model relates to a kind of coiled tubing underground throttle device, belongs to industrial gas oil underground operation tool technical field.
Background technology
In natural gas extraction, for step-down, throttling and limited production, at the gas well production initial stage underground throttle device is installed, after gas well deliverability descends, is pulled again out restriction choke production.Produce the later stage at gas well, because strata pressure is not enough, pit shaft begins hydrops, adopts coiled tubing as the speed tubing string, to improve the gas well fluid-carrying capability.Yet it is complicated that the input of restriction choke, salvaging and coiled tubing such as are lowered at the action routine, and operating expenses is higher.
Summary of the invention
The purpose of this utility model is to provide a kind of coiled tubing underground throttle device, and it combines with coiled tubing, and disposable being lowered to can be saved construction cost greatly, reduces the job safety risk.
Concrete technical scheme of the present utility model is as follows:
The upper slips sheath connects the lower slips sheath and together is sleeved on the coiled tubing, and adapter sleeve is contained in slips and watt seat on the coiled tubing in the slips sheath.Lower slips sheath bottom outer wall is provided with to stop up to cover grabs and stops up the cover sealing ring, stops up the cover snatch and connects the obstruction cover.Lower slips sheath bottom anchor ring is the restriction choke seat, and restriction choke is located on the restriction choke seat, and the restriction choke outer wall is provided with the restriction choke sealing ring.
This coiled tubing is combined construction with underground throttle device with coiled tubing, can realize the disposable well that enters, and can simplify construction sequence, saves construction cost, reduction job safety risk.When need of production, can build the pressure and destroy restriction choke, adopt blank tubing production, have simple in structure, handling ease, the advantage such as with low cost and easy to operate.
Description of drawings
Fig. 1 is coiled tubing underground throttle device structural representation.
Fig. 2 destroys the coiled tubing underground throttle device structural representation that stops up cover.
Fig. 3 is the setting coiled tubing of pitching underground throttle device structural representation.
Fig. 4 is for destroying coiled tubing underground throttle device structural representation behind the restriction choke.
The specific embodiment
Further specify referring to figs. 1 through 4 couples of embodiment of the present utility model:
Embodiment:
This restriction choke comprises upper slips sheath 1, slips 2, watt seat 3, lower slips sheath 4, restriction choke 8 and stops up cover 9;
Be threaded lower slips sheath 4 and together being sleeved on the coiled tubing of upper slips sheath 1, adapter sleeve is contained in slips 2 and watt seat 3 on the coiled tubing in the upper lower slips sheath.Lower slips sheath 4 bottom outer walls are provided with semicircular obstruction cover and grab 5 and stop up cover sealing ring 6, stop up cover and grab 5 snappings and stop up cover 9.Lower slips sheath 4 bottom anchor rings are restriction choke seat 10, and restriction choke 8 is located on the restriction choke seat 10, and restriction choke 8 outer walls are provided with restriction choke sealing ring 7.
The utility model course of work is as follows:
The utility model is connected to the coiled tubing tail end by slips 2, is lowered in the gas well sleeve pipe by coiled tubing work vehicle, adopts hanger to be installed on the christmas tree.When coiled tubing is lowered to pit shaft, stops up cover 9 and enter pit shaft for the shutoff natural gas.
1. destroy and stop up cover
Give the coiled tubing pressurising, stop up cover 9 pressure at two ends balances after, adopt the sleeve pipe working system to reduce flowing bottomhole pressure (FBHP), and tubing pressure remains unchanged, and stops up cover 9 lower end pressure decreaseds, when pressure reduction during greater than 0.2MPa, stop up cover 9 and break away from and stop up cover and grabs 5 and fall.
2, destroy restriction choke
Restriction choke production is adopted in gas well production in earlier stage, and bottom pressure is greater than upper wellbore pressure, and natural gas flow flows to ground from the shaft bottom, and restriction choke 8 can be setting on restriction choke seat 10 by restriction choke sealing ring 7.Gas well is produced the later stage, and strata pressure reduces, and need to destroy and restrict the restriction choke 8 that gas well is taken liquid production, as the speed tubing string, improves the gas well fluid-carrying capability with coiled tubing.Namely drop into the low-density ball from the christmas tree well head, setting on restriction choke 8, well head begins to suppress, and strengthens the pressure of restriction choke 8 upper ends.When pressure reduction during greater than 2MPa, 7 distortion of restriction choke sealing ring make restriction choke 8 come off from restriction choke seat 10, fall into the shaft bottom after, gas well adopts coiled tubing production.
Claims (1)
1. coiled tubing underground throttle device is characterized in that:
The upper slips sheath (1) of this restriction choke connects lower slips sheath (4) and together is sleeved on the coiled tubing, and adapter sleeve is contained in slips (2) and watt seat (3) on the coiled tubing in the slips sheath; Lower slips sheath (4) bottom outer wall is provided with to stop up to cover and grabs (5) and stop up cover sealing ring (6), stops up cover and grabs (5) snapping obstruction cover (9); Lower slips sheath (4) bottom anchor ring is restriction choke seat (10), and restriction choke (8) is located on the restriction choke seat (10), and restriction choke (8) outer wall is provided with restriction choke sealing ring (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220420627 CN202900204U (en) | 2012-08-23 | 2012-08-23 | Downhole throttle device for coiled tubing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220420627 CN202900204U (en) | 2012-08-23 | 2012-08-23 | Downhole throttle device for coiled tubing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202900204U true CN202900204U (en) | 2013-04-24 |
Family
ID=48120887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220420627 Expired - Fee Related CN202900204U (en) | 2012-08-23 | 2012-08-23 | Downhole throttle device for coiled tubing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202900204U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453732A (en) * | 2013-09-13 | 2015-03-25 | 中国石油天然气股份有限公司 | Pup joint device for pulling out velocity string |
| CN112302586A (en) * | 2020-10-30 | 2021-02-02 | 中国石油天然气股份有限公司 | Production process for putting speed pipe column with choke at tail end into well |
| CN114810021A (en) * | 2021-01-20 | 2022-07-29 | 中国石油天然气集团有限公司 | Gas well full life cycle coiled tubing completion pipe string and process method thereof |
-
2012
- 2012-08-23 CN CN 201220420627 patent/CN202900204U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453732A (en) * | 2013-09-13 | 2015-03-25 | 中国石油天然气股份有限公司 | Pup joint device for pulling out velocity string |
| CN112302586A (en) * | 2020-10-30 | 2021-02-02 | 中国石油天然气股份有限公司 | Production process for putting speed pipe column with choke at tail end into well |
| CN114810021A (en) * | 2021-01-20 | 2022-07-29 | 中国石油天然气集团有限公司 | Gas well full life cycle coiled tubing completion pipe string and process method thereof |
| CN114810021B (en) * | 2021-01-20 | 2024-03-01 | 中国石油天然气集团有限公司 | Gas well full life cycle coiled tubing completion string and process method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20210823 |