CN2193920Y - Simple casing joint - Google Patents
Simple casing joint Download PDFInfo
- Publication number
- CN2193920Y CN2193920Y CN 93223795 CN93223795U CN2193920Y CN 2193920 Y CN2193920 Y CN 2193920Y CN 93223795 CN93223795 CN 93223795 CN 93223795 U CN93223795 U CN 93223795U CN 2193920 Y CN2193920 Y CN 2193920Y
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- CN
- China
- Prior art keywords
- head
- hanging
- housing
- conical surface
- casing
- 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 relates to a simple casing joint which is applied to the well head equipment in the technical field of the exploration and development of the oil field and gas field, and has the functions of connecting a surface casing tube, hanging the inner layer casing tube and sealing the annular space between the two layers of the casing tubes. The utility model is mainly composed of a hanging head and a housing, and is one part of the well head equipment for drilling. The characteristic is that an integral type hanging head is adopted. A conical surface is arranged on the hanging head, and the conical surface is matched with the conical surface on the housing to realize the functions of hanging and sealing. The features are that the operation is easy and simple; the installing time is short; the sealing performance is reliable. The utility model overcomes the disadvantages of the existing casing joint that the structure is complex; the operation is inconvenient; the installing time is long; the loosing of the casing tube is easily caused by removing the landing joint, etc.
Description
The utility model is the simple and easy casing head of a kind of fast-assembling, is applied to the wellhead assembly of oil, gas field exploration Development Engineering technical field.It and well head four-way, preventer and horn mouth are formed wellhead for drilling.Its effect is to connect surface pipe, hangs inner layer sleeve, the annular space between the sealing two layers sleeve pipe.
Two kinds of casing heads are arranged in the prior art.
First kind of casing head is combined type slips suspended structure.Form by housing and hanging head.The housing endoporus is the conical surface.The housing lower end connects with surface pipe, and the upper end connects with four-way with flange.Hanging head is made up of the sealing ring and the bolt of 2-4 slips, two pairs of semicircle back-up rings, opening.Adopt slips to realize hanging inner layer sleeve, unavoidably will damage the inner layer sleeve body; And slips must be made into the combined type of multi-disc.This knockdown casing head could be packed hanging head between casing head housing and the inner layer sleeve box cupling after finishing well cementation work.Because this CASINGHEAD STRUCTURE complexity need be raised four-way, preventer and the horn mouth of well head during installation simultaneously.These work all are to carry out under rig floor, and labour intensity is big, inconvenient operation, and the set-up time is long.
Second kind of casing head also is made up of housing and hanging head.The housing endoporus is the conical surface.The housing lower end connects with surface pipe, and the upper end connects with four-way with flange.What be different from first kind of casing head is that hanging head partly is made up of taper sheath, interior exterior seal ring, back-up ring, gland and set bolt.The taper sheath endoporus has individual step, and the inner layer sleeve box cupling is sitting on the taper sheath endoporus step, realizes that sleeve pipe hangs.When this hanging head is installed, do not need to raise well head four-way, preventer and horn mouth, but when the assembly of hanging head was installed, the set-up time was long.When dismantling landing joint, the inner layer sleeve box cupling is unclamped.
The purpose of this utility model is that the hanging head that overcomes the combined casing head adopts multi-disc slips form, and back-up ring is semicircle, installs inconvenient; In the installation process, it is heavy to work, the shortcoming that the time is long.Overcome second kind of casing head simultaneously, the shortcoming that the complex structure part is many.Further simplify the structure of casing head, reduce labour intensity is installed, it is easier that hanging head is installed, and shortens the operating time.
The utility model is made up of housing and hanging head, the housing lower end connects with surface pipe, the upper end connects with four-way, be different from the prior art part and be that hanging head is a monolithic, the screw thread that connects landing joint and hang inner layer sleeve is arranged on the hanging head, the hanging head side is the conical surface, and sealing ring is arranged on the conical surface, and the quantity of sealing ring is 1 to 6.Enclosure interior has the conical surface that matches with hanging head.
Because hanging head of the present utility model is an overall structure, utilize the hanging head conical surface to realize hanging.And have sealing ring on the hanging head, fitting operation is convenient, and the set-up time is short, improves sealing performance.During the loading and unloading landing joint, the inner layer sleeve box cupling can not become flexible.Overcome many shortcomings of existing casing head, long as field installation time, inconvenient operation.
Fig. 1 explanation: this accompanying drawing is the assembling drawing of the simple and easy casing head of fast-assembling, is the assembling drawing under the on-the-spot user mode.Being an embodiment, is not the application's full content.1, housing, 2, hanging head, 3, jackscrew, 4, sealing ring, 5, inner layer sleeve, 6, surface pipe, 7, plug, 8, landing joint.
Embodiment: the simple and easy casing head of fast-assembling with TF340 * 140 specifications is an example, further specifies.As accompanying drawing, it is 340 millimeters casing string (6) that casing head housing (1) lower end hangs external diameter, above and four-way, horn mouth and preventer link, the tapering of housing (1) endoporus is 1:6.Hanging head (2) upper end screw thread connects landing joint (8), and lower end screw thread connection external diameter is 140 millimeters a casing string (5).Hanging head (2) side is the conical surface, and tapering is 1:6, and is identical with housing (1) hole taper.Two seals circle (4) is arranged on the conical surface of hanging head (2), the jackscrew groove is arranged in the middle of the two seals circle (4).Two pipe plug openings and plug (7) are arranged at housing (1) bottom, so that squeeze method.In order to prevent that hanging head (2) from moving up, the side is provided with the jackscrew (7) of 4 M30, fixedly hanging head (2).
Claims (4)
1, a kind of simple and easy casing head, formed by housing (1) and hanging head (2), housing (1) lower end connects with surface pipe (6), the upper end connects with four-way, it is characterized in that: hanging head (2) is monolithic, and the screw thread of connection landing joint (8) and suspension inner layer sleeve (5) is arranged on the hanging head (2), and hanging head (2) is the conical surface with the fitting face of housing (1), sealing ring (4) is arranged on the conical surface, and the quantity of sealing ring (4) is 1 to 6.
2, simple and easy casing head as claimed in claim 1 is characterized in that: on hanging head (2) conical surface holddown groove is arranged, fixedly jackscrew (3) is arranged on housing (1).
3, simple and easy casing head as claimed in claim 2 is characterized in that: fixedly the quantity of jackscrew (3) is 2 to 6.
4, simple and easy casing head as claimed in claim 1 is characterized in that: pipe plug opening and plug (7) are arranged at housing (1) bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93223795 CN2193920Y (en) | 1993-09-11 | 1993-09-11 | Simple casing joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93223795 CN2193920Y (en) | 1993-09-11 | 1993-09-11 | Simple casing joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2193920Y true CN2193920Y (en) | 1995-04-05 |
Family
ID=33802016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93223795 Expired - Fee Related CN2193920Y (en) | 1993-09-11 | 1993-09-11 | Simple casing joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2193920Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100384694C (en) * | 2004-06-07 | 2008-04-30 | 中国海洋石油总公司 | Inner expanding annular space stopper |
| CN102359349A (en) * | 2011-08-28 | 2012-02-22 | 中国石油天然气集团公司 | Metallic seal test tubing head |
| CN105840112A (en) * | 2016-03-24 | 2016-08-10 | 中国石油天然气股份有限公司 | surface casing cementing assembly |
-
1993
- 1993-09-11 CN CN 93223795 patent/CN2193920Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100384694C (en) * | 2004-06-07 | 2008-04-30 | 中国海洋石油总公司 | Inner expanding annular space stopper |
| CN102359349A (en) * | 2011-08-28 | 2012-02-22 | 中国石油天然气集团公司 | Metallic seal test tubing head |
| CN105840112A (en) * | 2016-03-24 | 2016-08-10 | 中国石油天然气股份有限公司 | surface casing cementing assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |