CN201106433Y - Hanger type thermal-picking casing head of casing - Google Patents
Hanger type thermal-picking casing head of casing Download PDFInfo
- Publication number
- CN201106433Y CN201106433Y CNU2007201738615U CN200720173861U CN201106433Y CN 201106433 Y CN201106433 Y CN 201106433Y CN U2007201738615 U CNU2007201738615 U CN U2007201738615U CN 200720173861 U CN200720173861 U CN 200720173861U CN 201106433 Y CN201106433 Y CN 201106433Y
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- China
- Prior art keywords
- bushing
- conical surface
- hanger
- housing
- casing
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- 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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Abstract
The utility model relates to a bushing hanger type thermal production bushing head which is applied to the wellhead control of an oilfield oil (gas) production well, and is characterized in that an annular salient is arranged on the external wall of a bushing hanger, and the external wall of the annular salient is a conical surface. A ring notch is arranged on the conical surface, and a soft metal seal ring is arranged in the notch. The inner wall of the upper end of a case is a conical surface, and the conical surface of the bushing hanger annular salient is matched with the conical surface of the upper end of the case. An upper gland is arranged on the upper end of the case, and is fixed with the case by a bolt. A center hole sleeve of the upper gland is arranged on the external wall of the bushing hanger, and is pressed on the upper part of the annular salient of the bushing hanger. A side entry sub is fixed with the lower end of the case and is provided with a screwed plug. The bushing hanger type thermal production bushing head has the effects that hanging an inner layer bushing can be realized, the bushing ring space can be sealed, the requirements of the heavy oil thermal production development technology can be adapted, and a bushing can be prevented from moving upwards during the process of steam injection. Compared with a bushing head of the identical type, the bushing hanger type thermal production bushing head also has the characteristics of simple structure, small volume, light weight, rapid and convenient installation, etc.
Description
Technical field
The utility model relates to the control head of oil field oil recovery (gas) well, and particularly a kind of casing head is the hanging thermal extraction casing head of a kind of sleeve pipe.
Background technology
Casing head is mounted in surface pipe post upper end, is used for hanging the device of inner layer sleeve and Sealed casing pipe annular space.Generally form by body, four-way, casing hanger and black box.Along with the exploitation of heavy crude heat extraction, require the performance of casing head higher, need be by the superheated steam of temperature up to 300 ℃-350 ℃; And between the ectonexine tubing string, form wiper seal.Because the thermal process middle sleeve is subjected to thermal stretching under high temperature action, make and scurry on the surface pipe, the later stage oil producing operation is had a negative impact.The casing head that adopts can not adapt to the requirement of heavy crude heat extraction at present.
Chinese patent notification number CN2804363Y provides a kind of dual-grip thermal extraction casing head, is a kind of thermal extraction casing head that adopts the lower slips suspended structure,
The utility model content
The purpose of this utility model is: provides a kind of sleeve pipe hanging thermal extraction casing head, can realize hanging inner layer sleeve, and energy Sealed casing pipe annular space, can adapt to the requirement of heavy crude heat extraction development technology, in the process of steam injection, can prevent to scurry on the sleeve pipe.Overcome the deficiency that present casing head can not adapt to heavy crude heat extraction.
The technical solution adopted in the utility model is: the hanging thermal extraction casing head of the utility model sleeve pipe mainly is made up of housing, casing hanger, upper press cover.There is internal thread the casing hanger upper end, and there is external screw thread the casing hanger lower end, it is characterized in that: on the outer wall of casing hanger annular projection is arranged, the outer wall of annular projection is the big conical surface of the little upper diameter of lower diameter.Annular groove is arranged on the conical surface, the soft metal sealing ring is arranged in the groove.Housing upper end inwall is the big conical surface of the little upper diameter of lower diameter.The cone match of the conical surface housing upper end of casing hanger annular projection has metal o-ring can play the refractory seals effect between the conical surface.It is annular that there are upper press cover, upper press cover in the housing upper end, adopts bolt between upper press cover and the housing.The centre bore of upper press cover is enclosed within on the casing hanger outer wall, and upper press cover is pressed in the annular projection top of casing hanger.The lower end of housing is fixed with by-pass connection, and plug is arranged on the by-pass connection.The lower end outer wall of housing has external screw thread.
For sealing and the suspension reliability that improves the hanging thermal extraction casing head of sleeve pipe, the tapering of the casing hanger annular projection conical surface and the housing upper end conical surface is between the 10-15 degree.
The safety of sleeve pipe screw thread is having alignment pin between the plane on upper press cover and the casing hanger annular projection when guaranteeing underground work, has on plane on the casing hanger annular projection and the corresponding stopper slot of alignment pin.
The beneficial effects of the utility model are: the hanging thermal extraction casing head of the utility model sleeve pipe, can realize hanging inner layer sleeve, and energy Sealed casing pipe annular space, can adapt to the requirement of heavy crude heat extraction development technology, in the process of steam injection, can prevent to scurry on the sleeve pipe.Bilayer sleeve automatic centering in the installation process can realize sealing voluntarily, in addition this casing head compare with similar casing head also have simple in structure, volume is little, in light weight; Characteristics such as convenient rapidly are installed.The utility model can satisfy the site operation requirement fully through ground experiment and The field, is subjected to the favorable comment of drilling crew, and broad prospect for its application is arranged.
Description of drawings
Fig. 1 is the hanging thermal extraction casing head structural profile of a utility model sleeve pipe schematic diagram.
Among the figure, 1. casing hanger, 2. upper press cover, 3. alignment pin, 4. bolt, 5. sealing ring, 6. housing, 7. by-pass connection, 8. plug.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Embodiment 1: consult Fig. 1.The hanging thermal extraction casing head of sleeve pipe with a 10-3/4 " * 7 " specification is that example is elaborated.Housing 6 lower end screw threads are 10-3/4, and " API overlaps pipe thread.Casing hanger 1 upper end screw thread is 7, and " internal thread of API cover pipe thread, the lower end screw thread is 7, and " API overlaps the external screw thread of pipe thread.
660 millimeters of the length of casing hanger 1.An annular projection is arranged, 56 millimeters of the thickness of annular projection on the outer wall of casing hanger 1.The outer wall of annular projection is 220 millimeters of lower diameter, and the conical surface that upper diameter is 260 millimeters, the tapering of the conical surface are 13 degree.The bipassage ring connected in star is arranged on the conical surface, be inlaid with the rectangular seal 5 that a brass is made in the per pass groove.Sealing ring 5 exceeds 2 millimeters than annular groove.Housing 6 upper end inwalls are the big conical surfaces of the little upper diameter of lower diameter.The cone match of conical surface housing 6 upper ends of casing hanger 1 annular projection.There is upper press cover 2 housing 6 upper ends, and upper press cover 2 is an annular, and upper press cover 2 diameter of bores are identical with the external diameter on casing hanger 1 top.Adopt bolt 4 fixing between upper press cover 2 and the housing 6.The centre bore of upper press cover 2 is enclosed within on casing hanger 1 outer wall, and upper press cover 2 is pressed in the annular projection top of casing hanger 1.The lower end of housing 6 is welded with 2 by-pass connections 7, and plug 8 is arranged on the by-pass connection 7.Be symmetrically distributed with 2 alignment pins 3 between the plane on upper press cover 2 and casing hanger 1 annular projection, on plane on casing hanger 1 annular projection, having and alignment pin 3 corresponding stopper slots.
Operating principle and use: two open before with casing head housing 6 and surface pipe screwed connection, two open when finishing back time production string, casing hanger 1 is connected under the landing joint, and is connected, transfer landing joint casing hanger 1 seat and hang on the housing 6 upper end conical surfaces with the oil reservoir cover in the top.Lay down the plug 8 of two by-pass connections then, carry out well cementing operation as the well cementation circulation canal.Well cementation is laid down landing joint after finishing, and casing head upper press cover 2 is connected with bolt 4 with housing, installs two plugs (8) again.For sleeve pipe screw thread safety during operation after guaranteeing, this casing head is provided with alignment pin (3) and corresponding with it stopper slot in addition.
Claims (3)
1, the hanging thermal extraction casing head of a kind of sleeve pipe is mainly by housing (6), casing hanger (1), upper press cover (2) is formed, there is internal thread casing hanger (1) upper end, there is external screw thread casing hanger (1) lower end, it is characterized in that: on the outer wall of casing hanger (1) annular projection is arranged, the outer wall of annular projection is the big conical surface of the little upper diameter of lower diameter, annular groove is arranged on the conical surface, soft metal sealing ring (5) is arranged in the groove, housing (6) upper end inwall is the big conical surface of the little upper diameter of lower diameter, the cone match of the conical surface of casing hanger (1) annular projection and housing (6) upper end, there is upper press cover (2) housing (6) upper end, upper press cover (2) is an annular, adopt bolt (4) fixing between upper press cover (2) and the housing (6), the centre bore of upper press cover (2) is enclosed within on casing hanger (1) outer wall, and upper press cover (2) is pressed in the annular projection top of casing hanger (1), and the lower end of housing (6) is fixed with by-pass connection (7), plug (8) is arranged on the by-pass connection (7), and the lower end outer wall of housing (6) has external screw thread.
2, the hanging thermal extraction casing head of sleeve pipe according to claim 1 is characterized in that: the tapering of casing hanger (1) the annular projection conical surface and housing (6) the upper end conical surface is between the 10-15 degree.
3, the hanging thermal extraction casing head of sleeve pipe according to claim 1 and 2, it is characterized in that between the last plane of upper press cover (2) and casing hanger (1) annular projection, alignment pin (3) being arranged, on the last plane of casing hanger (1) annular projection, have and the corresponding stopper slot of alignment pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201738615U CN201106433Y (en) | 2007-10-30 | 2007-10-30 | Hanger type thermal-picking casing head of casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201738615U CN201106433Y (en) | 2007-10-30 | 2007-10-30 | Hanger type thermal-picking casing head of casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201106433Y true CN201106433Y (en) | 2008-08-27 |
Family
ID=39958233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201738615U Expired - Lifetime CN201106433Y (en) | 2007-10-30 | 2007-10-30 | Hanger type thermal-picking casing head of casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201106433Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306632A (en) * | 2012-03-12 | 2013-09-18 | 江苏咸中石油机械有限公司 | All-metal sealing slip type casing head |
| CN114000849A (en) * | 2021-11-26 | 2022-02-01 | 京鸿石油钻采工程技术有限公司 | Casing head, casing head combination and wellhead assembly |
-
2007
- 2007-10-30 CN CNU2007201738615U patent/CN201106433Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306632A (en) * | 2012-03-12 | 2013-09-18 | 江苏咸中石油机械有限公司 | All-metal sealing slip type casing head |
| CN114000849A (en) * | 2021-11-26 | 2022-02-01 | 京鸿石油钻采工程技术有限公司 | Casing head, casing head combination and wellhead assembly |
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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: 20080827 |
|
| CX01 | Expiry of patent term |