CN202194623U - Composite oil pipe well completion pipe string combined structure - Google Patents
Composite oil pipe well completion pipe string combined structure Download PDFInfo
- Publication number
- CN202194623U CN202194623U CN2011203181778U CN201120318177U CN202194623U CN 202194623 U CN202194623 U CN 202194623U CN 2011203181778 U CN2011203181778 U CN 2011203181778U CN 201120318177 U CN201120318177 U CN 201120318177U CN 202194623 U CN202194623 U CN 202194623U
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- oil pipe
- corrosion resistant
- resistant alloy
- composite oil
- composite
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- 239000002131 composite material Substances 0.000 title claims abstract description 68
- 230000007797 corrosion Effects 0.000 claims abstract description 84
- 238000005260 corrosion Methods 0.000 claims abstract description 84
- 239000000956 alloy Substances 0.000 claims abstract description 77
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 75
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 8
- 239000010962 carbon steel Substances 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 abstract description 5
- 239000002253 acid Substances 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- 238000005530 etching Methods 0.000 description 3
- 229910001339 C alloy Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a compound oil pipe well completion pipe cluster integrated configuration, including compound oil pipe, subsurface safety valve, circulating valve, well completion packer, corrosion resistant alloy oil pipe, seat joint, ball seat and screen pipe, subsurface safety valve and circulating valve set up on compound oil pipe, and the circulating valve is located subsurface safety valve below, well completion packer sets up in compound oil pipe and corrosion resistant alloy oil pipe junction, sits and puts the joint setting on corrosion resistant alloy oil pipe, and the ball seat setting is in corrosion resistant alloy oil pipe and screen pipe junction. The utility model overcomes the corrosion problem of the outer wall of the oil pipe below the well completion packer of the common lining corrosion resistant alloy composite oil pipe string, and solves the problems of corrosion resistance and high cost in the development of the acid oil and gas field.
Description
Technical field
The utility model relates to a kind of composite oil pipe completion tubular string combining structure of corroding of in acid-soluble oil gas field exploitation, preventing.
Background technology
In the exploitation of acid-soluble oil gas field, the completion oil pipe string is generally put joint, ball seat, screen casing etc. and is connected to form by corrosion resistant alloy oil pipe and storm valve, circulating valve, completion packer, seat, leans on Utiloy anticorrosion; Perhaps put joint, ball seat, screen casing etc. and connect to form with common low-alloy carbon steel oil pipe and storm valve, circulating valve, chemical agent injection valve, completion packer, seat, anticorrosion by injecting corrosion inhibiter; Perhaps put joint, ball seat, screen casing etc. and connect to form, lean on the liner corrosion-resistant alloy layer of composite oil pipe anticorrosion with liner corrosion resistant alloy composite oil pipe and storm valve, circulating valve, completion packer, seat.In these oil pipe string combinations, the combination of corrosion resistant alloy oil pipe causes development cost high because the corrosion resistant alloy price is very high, deficiency in economic performance, and output does not reach a certain size, and oil gas field is not developed value; Low-alloy carbon steel oil pipe combination resistance to corrosion is poor, and the operating cost of injecting chemical corrosion inhibiter is high, and development cost is also very high; Though the corrosion that the combination of liner corrosion resistant alloy composite oil pipe has solved tube inner wall, with the lower part, the etching problem of oil-pipe external wall does not solve, and still has hidden danger at packer.
Summary of the invention
The purpose of the utility model is to overcome the problems referred to above that the completion oil pipe string exists; A kind of composite oil pipe completion tubular string combining structure is provided; The utility model has overcome the oil-pipe external wall etching problem of liner corrosion resistant alloy composite oil pipe string below the completion packer commonly used, has solved the anticorrosion and high problem of cost in the exploitation of acid-soluble oil gas field.
For realizing above-mentioned purpose, the technical scheme that the utility model adopts is following:
A kind of composite oil pipe completion tubular string combining structure; It is characterized in that: comprise composite oil pipe, storm valve, circulating valve, completion packer, corrosion resistant alloy oil pipe, sit and put joint, ball seat and screen casing; Said storm valve and circulating valve are arranged on the composite oil pipe; And circulating valve is positioned at the storm valve below; Said completion packer is arranged on composite oil pipe and corrosion resistant alloy oil pipe junction, and seat is put joint and is arranged on the corrosion resistant alloy oil pipe, and ball seat is arranged on corrosion resistant alloy oil pipe and screen casing junction.
Said composite oil pipe comprises low-alloy carbon steel body and corrosion resistant alloy liner.
The upper and lower side that said composite oil pipe, storm valve, circulating valve, completion packer, corrosion resistant alloy oil pipe, seat are put joint, ball seat and screen casing is provided with the hermetic seal screw thread.
Said ball seat lower end is threaded in the box cupling of screen casing upper end, and the upper end is connected with the corrosion resistant alloy oil pipe.
The lower end that said seat is put joint is threaded in the upper end box cupling of corrosion resistant alloy oil pipe, and the upper end connects the corrosion resistant alloy oil pipe.
The lower end of said completion packer is threaded in the upper end box cupling of corrosion resistant alloy oil pipe, and the upper end connects composite oil pipe.
Said circulating valve lower end is threaded in the upper end box cupling of composite oil pipe, and the upper end connects composite oil pipe.
Said storm valve lower end is threaded in the upper end box cupling of composite oil pipe, and the upper end connects composite oil pipe.
Adopt the advantage of the utility model to be:
One, adopt this practicality new after, type has overcome the oil-pipe external wall etching problem of liner corrosion resistant alloy composite oil pipe string below the completion packer commonly used, has solved the anticorrosion and high problem of cost in the exploitation of acid-soluble oil gas field.
Two, in the utility model, composite oil pipe comprises low-alloy carbon steel body and corrosion resistant alloy liner, can be responsible for providing the strength character of oil pipe by body, and the corrosion resistance of oil pipe is provided by liner.
Three, behind employing the utility model; At the completion packer setting; After the oil gas well is gone into operation, in the annular space of oil pipe more than the completion packer and sleeve pipe, can inject protection liquid such as light oil or clear water, the balance that can keep-up pressure also prevents that corrosive medium from getting into annular space corrosion oil-pipe external wall.
Four, behind employing the utility model, the oil pipe below the completion packer, adopting whole material is the corrosion resistant alloy oil pipe of corrosion resistant alloy; Guarantee it in whole Development and Production process, be immersed in the sour corrosion medium and corrosion and damage does not take place, and the outer wall of the above oil pipe of completion packer; Because of not contacting with produced fluid, not threatened by corrosion, adopted the low-carbon alloy steel material; Can under the condition that guarantees oil pipe intensity, reduce whole well oil pipe expense.
Five, behind employing the utility model, the oil pipe surface of the fluid that contains the sour corrosion medium of all contact outputs of full well all is a corrosion resistant alloy material, can be anticorrosive; But the body as the oil pipe more than the packer of oil pipe main body is the low-alloy carbon steel material, and overall cost is lower.
Description of drawings
Fig. 1 is the utility model structural representation
Fig. 2 is the utility model composite oil pipe structural representation
Be labeled as among the figure: 1, composite oil pipe, 2, storm valve, 3, circulating valve, 4, the completion packer, 5, the corrosion resistant alloy oil pipe, 6, sit and put joint, 7, ball seat, 8, screen casing, 9, sleeve pipe, 10, the low-alloy carbon steel body, 11, the corrosion resistant alloy liner.
The specific embodiment
A kind of composite oil pipe completion tubular string combining structure; Comprise composite oil pipe, storm valve, circulating valve, completion packer, corrosion resistant alloy oil pipe, sit and put joint, ball seat and screen casing; Said storm valve and circulating valve are arranged on the composite oil pipe, and circulating valve is positioned at storm valve below, and said completion packer is arranged on composite oil pipe and corrosion resistant alloy oil pipe junction; Seat is put joint and is arranged on the corrosion resistant alloy oil pipe, and ball seat is arranged on corrosion resistant alloy oil pipe and screen casing junction.
In the utility model, said composite oil pipe comprises low-alloy carbon steel body and corrosion resistant alloy liner.
The upper and lower side that said composite oil pipe, storm valve, circulating valve, completion packer, corrosion resistant alloy oil pipe, seat are put joint, ball seat and screen casing is provided with the hermetic seal screw thread, presses buckle on the prescribed torque during connection.
Said ball seat lower end is threaded in the box cupling of screen casing upper end and is connected with screen casing, and the upper end is connected with the corrosion resistant alloy oil pipe.
The lower end that said seat is put joint is threaded in the upper end box cupling of corrosion resistant alloy oil pipe, and the upper end connects the corrosion resistant alloy oil pipe.
The lower end of said completion packer is threaded in the upper end box cupling of corrosion resistant alloy oil pipe, and the upper end connects composite oil pipe.
Said circulating valve lower end is threaded in the upper end box cupling of composite oil pipe, and the upper end connects composite oil pipe.
Said storm valve lower end is threaded in the upper end box cupling of composite oil pipe, and the upper end connects composite oil pipe.
The installation process of the utility model is following:
1, length and the compound mode by the gas producing technology requirement is lowered to completion perforation, formation testing with screen casing 8, in the well of preparing to go into operation, tightens the box cupling screw thread at well head by the moment of torsion of stipulating;
2, ball seat 7 lower ends are threaded in the box cupling of screen casing upper end, link closely by prescribed torque;
3, the corrosion resistant alloy oil pipe 5 that connects production engineering specifications length in ball seat 7 upper ends by the moment of torsion thread up of regulation, is put into well down;
The lower end of 4, seat being put joint 6 is threaded in the upper end box cupling of corrosion resistant alloy oil pipe 5, links closely by prescribed torque;
5, put the corrosion resistant alloy oil pipe 5 that joint 6 upper ends connect production engineering specifications length at seat,, put into well down by the prescribed torque thread up;
6, the lower end with completion packer 4 is threaded in the upper end box cupling of corrosion resistant alloy oil pipe 5, links closely by prescribed torque, and 4 work of inspection completion packer are gone up abnormal;
7, after the inspection normally, connect liner corrosion resistant alloy composite oil pipe 1,, put into well down by the prescribed torque thread up in the upper end of completion packer 4;
8, be lowered to the liner corrosion resistant alloy composite oil pipe 1 of production engineering specifications length, link closely by prescribed torque;
9, circulating valve 3 lower ends are threaded in the upper end box cupling of liner corrosion resistant alloy composite oil pipe 1, link closely by prescribed torque;
10, connect liner corrosion resistant alloy composite oil pipe 1 in the upper end of circulating valve 3, link closely by prescribed torque;
11, be lowered to the liner corrosion resistant alloy composite oil pipe 1 of production engineering specifications length, link closely by prescribed torque;
12, storm valve 2 lower ends are threaded in the upper end box cupling of liner corrosion resistant alloy composite oil pipe 1, link closely by prescribed torque;
13, connect liner corrosion resistant alloy composite oil pipe 1 in the upper end of storm valve 2, link closely, be fixed on liner corrosion resistant alloy composite oil pipe 1 external surface after the annex of storm valve 2 is installed by prescribed torque;
14, be lowered to the liner corrosion resistant alloy composite oil pipe 1 of production engineering specifications length and the annex of storm valve 2, by prescribed torque link closely, the annex of storm valve 2 is fixed on the external surface of liner corrosion resistant alloy composite oil pipe 1;
15, liner corrosion resistant alloy composite oil pipe 1 upper end is connected on the suspension joint of wellhead assembly, suspension joint is sat and is suspended in the wellhead assembly, and the annex of storm valve 2 is connected the assigned address of wellhead assembly and guarantees sealing;
16, set completion packer 4, pressure testing is qualified, accomplishes assembling.
The operating principle of the utility model is: this composite oil pipe completion tubular string combination G.I.H, set completion packer 4 after, induced flow is gone into operation.Borehole fluid is full of oil pipe and the annular space between sleeve pipe of packer below 4; Get into corrosion resistant alloy oil pipe 5, sit the endoporus of putting joint 6, ball seat 7 through screen casing 8; Again through completion packer 4 endoporus, liner corrosion resistant alloy composite oil pipe 1 endoporus and circulating valve 3 endoporus, storm valve 2 endoporus; Arrive wellhead assembly always, realize having the manufacturing process of control.In process of production; The inwall of liner corrosion resistant alloy composite oil pipe 1 more than 4 of the inside and outside wall that oil pipe and the seat of completion packer below 4 put joint 6, ball seat 7, screen casing 8 and completion packer, circulating valve 3, storm valve 2 contacts with produced fluid, receives the corrosion of produced fluid.And the outer wall of the liner corrosion resistant alloy composite oil pipe 1 of completion packer more than 4, circulating valve 3, storm valve 2 is in the annular space protection liquid 10, does not contact with produced fluid, not corroded by it.After adopting the combination of this pipe string, the tubing wall of all contact produced fluids all is corrosion resistant alloy materials in the well, can guarantee its corrosion resistance and application life.And the outer wall of completion packer 4 above oil pipes because of not contacting with produced fluid, is not threatened by corrosion, has adopted the low-carbon alloy steel material, can under the condition that guarantees oil pipe intensity, reduce whole well oil pipe expense.
Claims (8)
1. composite oil pipe completion tubular string combining structure; It is characterized in that: comprise composite oil pipe, storm valve, circulating valve, completion packer, corrosion resistant alloy oil pipe, sit and put joint, ball seat and screen casing; Said storm valve and circulating valve are arranged on the composite oil pipe; And circulating valve is positioned at the storm valve below; Said completion packer is arranged on composite oil pipe and corrosion resistant alloy oil pipe junction, and seat is put joint and is arranged on the corrosion resistant alloy oil pipe, and ball seat is arranged on corrosion resistant alloy oil pipe and screen casing junction.
2. composite oil pipe completion tubular string combining structure according to claim 1, it is characterized in that: said composite oil pipe comprises low-alloy carbon steel body and corrosion resistant alloy liner.
3. composite oil pipe completion tubular string combining structure according to claim 1 and 2 is characterized in that: the upper and lower side that said composite oil pipe, storm valve, circulating valve, completion packer, corrosion resistant alloy oil pipe, seat are put joint, ball seat and screen casing is provided with the hermetic seal screw thread.
4. composite oil pipe completion tubular string combining structure according to claim 1 and 2 is characterized in that: said ball seat lower end is threaded in the box cupling of screen casing upper end, and the upper end is connected with the corrosion resistant alloy oil pipe.
5. composite oil pipe completion tubular string combining structure according to claim 1 and 2 is characterized in that: the lower end that said seat is put joint is threaded in the upper end box cupling of corrosion resistant alloy oil pipe, and the upper end connects the corrosion resistant alloy oil pipe.
6. composite oil pipe completion tubular string combining structure according to claim 1 and 2 is characterized in that: the lower end of said completion packer is threaded in the upper end box cupling of corrosion resistant alloy oil pipe, and the upper end connects composite oil pipe.
7. composite oil pipe completion tubular string combining structure according to claim 1 and 2 is characterized in that: said circulating valve lower end is threaded in the upper end box cupling of composite oil pipe, and the upper end connects composite oil pipe.
8. composite oil pipe completion tubular string combining structure according to claim 1 and 2 is characterized in that: said storm valve lower end is threaded in the upper end box cupling of composite oil pipe, and the upper end connects composite oil pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203181778U CN202194623U (en) | 2011-08-29 | 2011-08-29 | Composite oil pipe well completion pipe string combined structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203181778U CN202194623U (en) | 2011-08-29 | 2011-08-29 | Composite oil pipe well completion pipe string combined structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202194623U true CN202194623U (en) | 2012-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203181778U Expired - Lifetime CN202194623U (en) | 2011-08-29 | 2011-08-29 | Composite oil pipe well completion pipe string combined structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202194623U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265250A (en) * | 2014-09-17 | 2015-01-07 | 中国海洋石油总公司 | Rapid induced flow completion pipe column for subsurface nitrogen making gas well |
| CN104632090A (en) * | 2013-11-08 | 2015-05-20 | 中国石油天然气股份有限公司 | Structure and method for preventing corrosion and damage of underground aluminum alloy-carbon steel pipe column |
-
2011
- 2011-08-29 CN CN2011203181778U patent/CN202194623U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104632090A (en) * | 2013-11-08 | 2015-05-20 | 中国石油天然气股份有限公司 | Structure and method for preventing corrosion and damage of underground aluminum alloy-carbon steel pipe column |
| CN104632090B (en) * | 2013-11-08 | 2017-01-25 | 中国石油天然气股份有限公司 | Structure and method for preventing corrosion and damage of underground aluminum alloy-carbon steel pipe column |
| CN104265250A (en) * | 2014-09-17 | 2015-01-07 | 中国海洋石油总公司 | Rapid induced flow completion pipe column for subsurface nitrogen making gas well |
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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: 20120418 |
|
| CX01 | Expiry of patent term |