CN204175228U - The marine thermal recovery well head device of monotubular twin-well - Google Patents
The marine thermal recovery well head device of monotubular twin-well Download PDFInfo
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- CN204175228U CN204175228U CN201420625298.0U CN201420625298U CN204175228U CN 204175228 U CN204175228 U CN 204175228U CN 201420625298 U CN201420625298 U CN 201420625298U CN 204175228 U CN204175228 U CN 204175228U
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- latus rectum
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- valve
- main latus
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Abstract
The utility model discloses the marine thermal recovery well head device of a kind of monotubular twin-well, is specially adapted to offshore oilfield steam injection thermal recovery technique.It is made up of casing head (1), tubing head (2), main latus rectum gate valve (3), main latus rectum combination valve (6), choke valve (5), gate valve (7), is provided with surface pipe (9) elongate space L in its casing head (1)
1=100 ~ 300mm, has protective casing (8) elongate space L in tubing head (2)
2=300 ~ 700mm, main latus rectum combination valve (6) is provided with the safety valve (4) that has shearing function, main latus rectum gate valve (3) lower flange is connected with tubing head (2) upper flange, its diameter is identical with tubing head (2) upper flange diameter, main latus rectum gate valve (3) upper flange is studding structure, directly connects with main latus rectum combination valve (6) lower flange.Namely the utility model solves thermal recovery steam injection process middle sleeve causes well head lifting problem by thermal stretching, solves again the safety problem in oil well well logging.
Description
Technical field
The utility model relates to the marine thermal recovery well head device of a kind of monotubular twin-well, is specially adapted to offshore oilfield steam injection thermal recovery technique.
Background technology
At present, monotubular twin-well wellhead for production is mainly used in conventional oil field monotubular twin-well oil production technology, along with the continuous exploitation of offshore oil, the production practice of viscous crude transfers to offshore oilfield from oil field, land, marine monotubular twin-well heavy crude heat extraction technique Pilot trial completes, find in process of the test marine monotubular twin-well thermal recovery well head device have following two problems: one be when thermal recovery steam injection process middle sleeve generation thermal expansion extend, cause well head lifting; Two is without shearing function at the safety valve be equipped with by marine monotubular twin-well thermal production well mouth production tree part, when meeting accident in oil well test operation process, when causing the accidents such as blowout to occur, as operation steel wire cannot be cut off in safety valve closing process, bring hidden danger can to the crude oil production of offshore platform.
Summary of the invention
The purpose of this utility model is to provide a kind of sleeve pipe by can not lifting well head after thermal stretching, and well mouth release valve has the marine thermal recovery well head device of monotubular twin-well of shearing function.
The utility model is achieved in that it is made up of casing head, tubing head, main latus rectum combination valve, main latus rectum gate valve, choke valve, gate valve, is provided with surface pipe elongate space L in its casing head
1=100 ~ 300mm, is provided with sleeve pipe elongate space L in tubing head
2=300 ~ 700mm, when in oil well during steam injection, surface pipe elongation discharges at casing head elongate space L
1in, protective casing elongation discharges the elongate space L at tubing head
2in, therefore can not lifting well head; Main latus rectum combination valve is provided with the safety valve that has shearing function, when carrying out oil well test operation, during as accidents such as an oil well blew out, can closed safe valve, and cut off test jobs steel wire, guarantee the production safety of offshore platform; Because casing head, tubing head increase surface pipe, protective casing elongate space L
1, L
2wellhead integral height is increased, but offshore platform limited space, this practicality newly devises special main latus rectum gate valve, its main latus rectum gate valve lower flange is connected with tubing head upper flange, its diameter is identical with tubing head upper flange diameter, main latus rectum gate valve upper flange is studding structure, directly connect with main latus rectum combination valve lower flange, eliminate the upper flange of main latus rectum gate valve and the adapter flange connected between tubing head and main latus rectum valve, because this reducing the whole height of well head, meet the height restriction of offshore platform to well head.
Namely the utility model solves thermal recovery steam injection process middle sleeve causes well head lifting problem by thermal stretching, solves again the safety in oil well test process.
Accompanying drawing explanation
Fig. 1 is the utility model structure principle chart.
Fig. 2 is the utility model CASINGHEAD STRUCTURE schematic diagram.
Fig. 3 is the utility model tubing head structural representation.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in detail: the utility model is made up of casing head (1), tubing head (2), main latus rectum gate valve (3), main latus rectum combination valve (6), choke valve (5), gate valve (7), is provided with surface pipe (9) elongate space L in its casing head (1)
1=100 ~ 300mm, is provided with protective casing (8) elongate space L in tubing head (2)
2=300 ~ 700mm, when in oil well during steam injection, surface pipe (9) elongation discharges at casing head (1) elongate space L
1in, protective casing (8) elongation discharges the elongate space L at tubing head (2)
2in, therefore can not lifting well head, main latus rectum combination valve (6) is provided with the safety valve (4) that has shearing function, when carrying out oil well test operation, during as accidents such as an oil well blew out, can closed safe valve (4), and cut off test jobs steel wire, guarantee the production safety of offshore platform, due to the elongate space L of casing head (1), tubing head (2) increase surface pipe (9), protective casing (8)
1, L
2, wellhead integral height is increased, but offshore platform limited space, this practicality newly devises special main latus rectum gate valve (3), its main latus rectum gate valve (3) lower flange is connected with tubing head (2) upper flange, its diameter is identical with tubing head (2) upper flange diameter, main latus rectum gate valve (3) upper flange is studding structure, directly connect with main latus rectum combination valve (5) lower flange, eliminate the upper flange of adapter flange that main latus rectum gate valve (3) connects with tubing head (2) and main latus rectum valve (3), because this reducing the whole height of well head, meet the height restriction of offshore platform to well head.
Claims (2)
1. the marine thermal recovery well head device of monotubular twin-well, it is made up of casing head (1), tubing head (2), main latus rectum gate valve (3), main latus rectum combination valve (6), choke valve (5), gate valve (7), it is characterized in that: be provided with surface pipe (9) elongate space L in casing head (1)
1=100 ~ 300mm, has protective casing (8) elongate space L in tubing head (2)
2=300 ~ 700mm, main latus rectum combination valve (6) is provided with the safety valve (4) that has shearing function.
2. the marine thermal recovery well head device of a kind of monotubular twin-well according to right 1, it is characterized in that main latus rectum gate valve (3) lower flange is connected with tubing head (2) upper flange, its diameter is identical with tubing head (2) upper flange diameter, main latus rectum gate valve (3) upper flange is studding structure, directly connects with main latus rectum combination valve (6) lower flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420625298.0U CN204175228U (en) | 2014-10-27 | 2014-10-27 | The marine thermal recovery well head device of monotubular twin-well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420625298.0U CN204175228U (en) | 2014-10-27 | 2014-10-27 | The marine thermal recovery well head device of monotubular twin-well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204175228U true CN204175228U (en) | 2015-02-25 |
Family
ID=52564045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420625298.0U Active CN204175228U (en) | 2014-10-27 | 2014-10-27 | The marine thermal recovery well head device of monotubular twin-well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204175228U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107916891A (en) * | 2016-10-08 | 2018-04-17 | 中国石油天然气股份有限公司 | A kind of boring method for being suitable for 26 inch conduit monotubular twin-wells |
-
2014
- 2014-10-27 CN CN201420625298.0U patent/CN204175228U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107916891A (en) * | 2016-10-08 | 2018-04-17 | 中国石油天然气股份有限公司 | A kind of boring method for being suitable for 26 inch conduit monotubular twin-wells |
| CN107916891B (en) * | 2016-10-08 | 2020-06-09 | 中国石油天然气股份有限公司 | Drilling method suitable for 26-inch guide pipe single-cylinder double wells |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |