CN2648047Y - Casing head - Google Patents
Casing head Download PDFInfo
- Publication number
- CN2648047Y CN2648047Y CN 03251093 CN03251093U CN2648047Y CN 2648047 Y CN2648047 Y CN 2648047Y CN 03251093 CN03251093 CN 03251093 CN 03251093 U CN03251093 U CN 03251093U CN 2648047 Y CN2648047 Y CN 2648047Y
- Authority
- CN
- China
- Prior art keywords
- hanger
- utility
- model
- casing
- wellhead
- 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
Links
Abstract
A casing head relates to a wellhead controlling machinery device of an oil (gas) well in the oilfield production, which pertains to the petroleum machineries. The utility model mainly comprises a double pin sub (1), a body (2), a bypass plug (3), a hanger (4), a protective cover (7) and so on, the unique design of the utility model is that: a conical-surface boss is designed in the body (2), the conical-surface boss is matched with the outer conical-surface which is arranged at the lower end of the hanger (4); a collar of an oil layer casing is arranged on a step in the hanger (4); the matching surfaces of the hanger (4) and an upper body (2) and the oil layer casing are designed with sealed structures. The utility model realizes the controllable well cementing which is provided with a blowout preventer and ensures the safety of the construction; when in necessary, the utility model can carry out the squeeze cement operations; the utility model eliminates the hidden danger of wellhead fire operation for cutting and fixing the casing of the traditional electric welding method, and improves the safety and reliability; the casing can be suspended and operated on a drill table directly, in addition, the utility model simplifies the procedure of wellhead operation and reduces the strength of the installation operation.
Description
Technical field
The utility model relates to the well head control plant equipment of (gas) well that recovers the oil in the field produces, especially a kind of casing head.
Background technology
At present, in the drilling and well completion process of oil (gas) well, owing to there is not supporting with it casing head, in solid completion work progress, need the dismounting wellhead blowout preventor, make well head be in spacious pressure, no control state, cause a hidden trouble, also do not meet the safety in production requirement simultaneously to safety in production.And show sleeve pipe well head hang and the structure that adopts, in installation process, exist major safety risks (the need electric welding is fixed and connected).
Summary of the invention
It is a kind of simple in structure, easy to operate that the utility model purpose is to provide, and can realize reliable suspension that control well cementation and sleeve pipe are arranged in the drilling process and the casing head of locating safely.
The utility model mainly is made up of two public pipe nipples 1, body 2, bypass plug 3, hanger 4, guard shield 7 etc., and its unique design is: design has a conical surface boss in the body 2, matches with the male cone (strobilus masculinus) of hanger 4 lower ends; The box cupling of production string is sitting on the step in the hanger 4; Hanger 4 has all designed hermetically-sealed construction with the fitting face of upper body 2 and production string.
The utlity model has following advantage: be hung in the casing head body because production string can utilize hanger directly to sit, and sit when hanging and need not dismantle preventer, realized that the band preventer has the control well cementation, has guaranteed construction safety; Have by-pass prot on the body, can carry out cement squeeze work; Adopt casing coupling to be sitting on the interior step of hanger and realize sleeve pipe is hung, cancelled with the mode of electrogas welding and cut fixed sleeving, avoided well head to get angry, improved security reliability; Sealing ring all is installed on the fitting face of the fitting face of hanger and sleeve pipe and hanger and casing head body, can guarantees in the cementing operation process sealing of annular space is prevented that cement paste from entering in the preventer; The suspension of production string can directly be handled on rig floor, simplify the program of well head operation, reduced the intensity of installation exercise, reduced the holding time of rig, improved the efficient of wellbore construction, guarantee the safety of cementing operation and the reliability of well head, satisfied drilling well and the demand of the safety in production of recovering the oil.
Description of drawings
Fig. 1 is the utility model structural representation
The specific embodiment
Below in conjunction with accompanying drawing the utility model is done further detailed description.
As shown in Figure 1, mainly by being made up of two public pipe nipples 1, body 2, bypass plug 3, hanger 4, guard shield 7 etc., its unique design is the utility model: design has a conical surface boss in the body 2, matches with the male cone (strobilus masculinus) of hanger 4 lower ends; The box cupling of production string is sitting on the step in the hanger 4; Hanger 4 has all designed hermetically-sealed construction with the fitting face of upper body 2 and production string.
Adopt the sealing of " Yx " RunddichtringO between hanger 4 and the production string.
Adopt two " O " RunddichtringO sealings separated by a distance between hanger 4 and the body 2.
When installing and using, the scene at first utilize two public pipe nipples 1 to be connected body 2 with the surface pipe of oil well.Install end flange in the upper end of body 2 then, install wellhead assemblies such as four-way, preventer successively, normally creep into.When after two end brill, being lowered to production string, before last root, the pin end of hanger 4 from this sleeve pipe upwards overlapped, splice sleeve is sitting on the box cupling of second from the bottom sleeve pipe hanger 4 then, utilization connects landing joint and transfers sleeve pipe, with the box cupling of last root sleeve pipe hanger 4 is pressed in the body 2.Sealing ring 5 is used to guarantee that the annular space between body 2 and the production string 6 seals, and prevents that cement paste from entering in preventer and the four-way.Can carry out cementing operation after finishing aforesaid operations, before the well cementation bypass plug 3 be unloaded, well cementation is first-class with bypass plug 3 again after finishing.If cementing quality goes wrong, can carry out operations such as squeeze method by by-pass prot.
Claims (3)
1. a casing head mainly is made up of two public pipe nipples (1), body (2), bypass plug (3), hanger (4), guard shield (7) etc., it is characterized in that: design has a conical surface boss in the body (2), matches with the male cone (strobilus masculinus) of hanger (4) lower end; The box cupling of production string is sitting on the interior step of hanger (4); Hanger (4) has all designed hermetically-sealed construction with the fitting face of body (2) and production string.
2. casing head according to claim 1 is characterized in that: adopt the sealing of " Yx " RunddichtringO between hanger (4) and the production string.
3. according to claim 1 or 2 described casing heads, it is characterized in that: adopt two " O " RunddichtringO sealings separated by a distance between hanger (4) and the body (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03251093 CN2648047Y (en) | 2003-05-07 | 2003-05-07 | Casing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03251093 CN2648047Y (en) | 2003-05-07 | 2003-05-07 | Casing head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2648047Y true CN2648047Y (en) | 2004-10-13 |
Family
ID=34327809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03251093 Expired - Lifetime CN2648047Y (en) | 2003-05-07 | 2003-05-07 | Casing head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2648047Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105587272A (en) * | 2016-01-28 | 2016-05-18 | 太仓市高泰机械有限公司 | Casing head easy to disassemble and assemble |
| CN110552661A (en) * | 2019-09-24 | 2019-12-10 | 中国石油集团渤海钻探工程有限公司 | Oil pipe external sealing plug valve connector |
-
2003
- 2003-05-07 CN CN 03251093 patent/CN2648047Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105587272A (en) * | 2016-01-28 | 2016-05-18 | 太仓市高泰机械有限公司 | Casing head easy to disassemble and assemble |
| CN110552661A (en) * | 2019-09-24 | 2019-12-10 | 中国石油集团渤海钻探工程有限公司 | Oil pipe external sealing plug valve connector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20081212 Address after: Hongyan Karamay Road, the Xinjiang Uygur Autonomous Region No. 80, zip code: 834000 Patentee after: Western Drilling Kelamayi Drilling Technology Institute Address before: Hongyan Karamay Road, the Xinjiang Uygur Autonomous Region No. 80, zip code: 834000 Patentee before: Research Inst of Drilling Technology, Xinjiang Petroleum Administration |
|
| ASS | Succession or assignment of patent right |
Owner name: WEST DRILLING KARAMAY DRILLING CRAFT RESEARCH INST Free format text: FORMER OWNER: DRILLING WELL TECHNOLOGY INSTITUTE, PETROLEUM ADMINISTRATION BUREAU, XINJIANG Effective date: 20081212 |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20130507 Granted publication date: 20041013 |