CN202249991U - Downhole throttling pipe column suitable for medium sour gas well - Google Patents
Downhole throttling pipe column suitable for medium sour gas well Download PDFInfo
- Publication number
- CN202249991U CN202249991U CN2011202926764U CN201120292676U CN202249991U CN 202249991 U CN202249991 U CN 202249991U CN 2011202926764 U CN2011202926764 U CN 2011202926764U CN 201120292676 U CN201120292676 U CN 201120292676U CN 202249991 U CN202249991 U CN 202249991U
- Authority
- CN
- China
- Prior art keywords
- gas well
- sour gas
- pipe column
- downhole
- medium sour
- 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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- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The utility model provides a downhole throttling pipe column suitable for a medium sour gas well, which is applied to downhole throttling of a medium sour gas well of an oil and gas field well. The pipe column is characterized in that an oil pipe is arranged in a casing of a medium sour gas well; the lower end of the oil pipe is connected with a setting working barrel; and a medium sour downhole throttler is fixed inside the setting working barrel by adopting a wire dropping method. The pipe column has the following effects that: the pipe column is applied to downhole throttling and pressure reduction in the medium sour gas reservoir, takes full advantage of the geotherm for warming, ensures the shaft to be free from hydrate blockage, reduces the pressure of the surface pipelines, controls the gas well yield, dispenses with the surface heating and insulating devices, simplifies the surface flow and improves the safety.
Description
Technical field
The utility model relates to oil gas field down-hole construction technology, the tubing string of the downhole choke that sour gas well is used in particularly a kind of being fit to.
Background technology
In recent years, the downhole choke technology in Sichuan oil gas field not sulfur-bearing or little, low sulfur-bearing (H
2S content＜5g/m
3) extensively carried out application in the gas well, obtained good technical economic benefit and social benefit.But conventional underground throttle device is owing to can not satisfy middle sulfur-bearing gas field (SY/T6168-1995 regulation hydrogen sulfide content 5～30g/m
3, be about 0.3～2%) application, seriously restricting the application extension of downhole choke technology.
Hydrogen sulfide has stronger corrosivity to downhole tool; Corrosion to downhole tool can not be ignored; 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.Hydrogen sulfide is varied to the forms of corrosion of petroleum gas equipment and steel, and is wherein maximum to the harm of petroleum gas Chemical Manufacture with the stress corrosion of hydrogen sulfide.
The utility model content
The purpose of the utility model is: the downhole choke tubing string that sour gas well is used in a kind of be fit to is provided, satisfies the requirement of sour gas well downhole choke technology in the scene, solve this difficult problem of sour gas well during the throttling tubing string is not suitable under the present oil gas field conventional well.
The technical scheme that the utility model adopts is: the downhole choke tubing string that sour gas well is used in being fit to comprises that oil pipe, middle sulfur-bearing underground throttle device and seat put seating nipple; It is characterized in that: in the sleeve pipe of middle sour gas well, oil pipe is arranged; Connect a seat in the lower end of oil pipe and put seating nipple; Present internal fixation of putting seating nipple has middle sulfur-bearing underground throttle device, and middle sulfur-bearing underground throttle device is to adopt fixing present the knocking off of steel wire put-on method to do in the tube.
The lower end of sulfur-bearing underground throttle device is fixed with a throttle nozzle in described.
The installation process of the downhole choke tubing string that sour gas well is used in being fit to.Consult Fig. 1.At first, taking a seat under in sleeve pipe 1 knocks off makes tube 5, and the upper end that seat is put seating nipple 5 is connected the lower end of oil pipe 2; Secondly, connect seat and put tool string, seat is put the instrument polyphone and is connect as follows: the rope socket+weighted lever+bumper jar+head of giving up+middle sulfur-bearing underground throttle device 4; Seat is put pack into lubricator and use the wire clips fastening of tool string, with crane lubricator and seat are put tool string one and install on lifting by crane paraffin valve.Slowly open paraffin valve, the inspection lubricator is the sealing situation at two ends up and down, seal qualified after, open paraffin valve; Seat is put tool string and after seat is put seating nipple 5 degree of depth, is stopped to transfer, record steel wire suspending weight, on carry 2～4m, transfer fast again, cut off and lose pin at hand.Slowly carry steel wire, observe and to refer to restatement, more than steel wire suspending weight decline 15kg, show that pin cuts off, give up.Otherwise repeating preceding step cuts off up to the pin of the head of giving up; On carry steel wire, rope socket+weighted lever+bumper jar+give up head gets into a lubricator, confirm that the steel wire counter returns zero after, use the wire clips fastening, taking-up rope socket, weighted lever, bumper jar, the head of giving up.Accomplish the installation of the downhole choke tubing string that sour gas well is used in being fit to.
The beneficial effect of the utility model: the downhole choke tubing string that sour gas well is used in being fit to, sour gas is ensconced shaft bottom throttling step-down in being applied to, and makes full use of geothermal-warming; Guaranteeing in pit shaft, can not form hydrate stops up; Reduced surface line pressure, control gas well output, cancellation ground heating and heat-insulating device; And the simplification ground flow, improved safety.
Description of drawings
Fig. 1 is the downhole choke tubular column structure sketch map that sour gas well was used during the utility model was fit to.
Among the figure, sulfur-bearing underground throttle device, 5-seat are put seating nipple, 6-throttle nozzle among 1-sleeve pipe, 2-oil pipe, 3-exit gas, the 4-, 7-shaft bottom source of the gas.
The specific embodiment
Embodiment 1:
Consult Fig. 1.The downhole choke tubing string that sour gas well is used in being fit to comprises 2
3/
8" oil pipe 2, middle sulfur-bearing underground throttle device 4 and seat are put seating nipple 5.In the sleeve pipe 1 of middle sour gas well, have 2
3/
8" oil pipe 2 is 2
3/
8" lower end of oil pipe 2 connects a seat and puts seating nipple 5, and present internal fixation of putting seating nipple 5 has middle sulfur-bearing underground throttle device 4, and middle sulfur-bearing underground throttle device 4 is to adopt fixing present the knocking off of steel wire put-on method to do in the tube 5.The lower end of middle sulfur-bearing underground throttle device 4 is fixed with a throttle nozzle 6.Middle sulfur-bearing underground throttle device 4 adopts the steel of hydrogen sulfide corrosion-resistants to process with throttle nozzle 6.
Shaft bottom source of the gas 7 is from throttle nozzle 6 gets in the sulfur-bearing underground throttle device 4; Through passing through middle sulfur-bearing underground throttle device 4 after the throttle nozzle 6 step-down throttlings; Become the lower exit gas of pressure 3, in the oil pipe 2 on exit gas 3 arrival tops, flow to ground then by extraction.
Claims (2)
- One kind be fit in the downhole choke tubing string used of sour gas well, comprise oil pipe (2), middle sulfur-bearing underground throttle device (4) and put seating nipple (5); It is characterized in that: in the sleeve pipe (1) of middle sour gas well, oil pipe (2) is arranged; Connect a seat in the lower end of oil pipe (2) and put seating nipple (5); Present internal fixation of putting seating nipple (5) has middle sulfur-bearing underground throttle device (4), and middle sulfur-bearing underground throttle device (4) is to adopt fixing present the knocking off of steel wire put-on method to do in the tube (5).
- 2. the downhole choke tubing string of using according to the said suitable middle sour gas well of claim 1 is characterized in that the lower end of described middle sulfur-bearing underground throttle device (4) is fixed with a throttle nozzle (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202926764U CN202249991U (en) | 2011-08-12 | 2011-08-12 | Downhole throttling pipe column suitable for medium sour gas well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202926764U CN202249991U (en) | 2011-08-12 | 2011-08-12 | Downhole throttling pipe column suitable for medium sour gas well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202249991U true CN202249991U (en) | 2012-05-30 |
Family
ID=46111250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202926764U Expired - Lifetime CN202249991U (en) | 2011-08-12 | 2011-08-12 | Downhole throttling pipe column suitable for medium sour gas well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202249991U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106481312A (en) * | 2016-12-20 | 2017-03-08 | 西安迈克斯石油技术有限公司 | Producing well wax-proofing apparatus and its system |
-
2011
- 2011-08-12 CN CN2011202926764U patent/CN202249991U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106481312A (en) * | 2016-12-20 | 2017-03-08 | 西安迈克斯石油技术有限公司 | Producing well wax-proofing apparatus and its system |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120530 |