CN104033125A - Double-wellhead device applicable to 26-inch conduit - Google Patents
Double-wellhead device applicable to 26-inch conduit Download PDFInfo
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- CN104033125A CN104033125A CN201410258135.8A CN201410258135A CN104033125A CN 104033125 A CN104033125 A CN 104033125A CN 201410258135 A CN201410258135 A CN 201410258135A CN 104033125 A CN104033125 A CN 104033125A
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- inch
- protective casing
- casing
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- box cupling
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Abstract
The invention relates to a double-wellhead device applicable to a 26-inch conduit. A 95/8-inch intermediate casing suspender is directly connected with a 95/8-inch intermediate casing; a plurality of sections of connected 95/8-inch intermediate casings are suspended under the suspender; the total weight of the casings can reach 350 tons; during casing installation, couplings of the 95/8-inch technical casings can be tightly pasted with the inner wall of the 26-inch conduit to be installed into a well through the gravity effect; when the 95/8-inch intermediate casing suspender enters the well, the lower part of the 95/8-inch intermediate casing suspender is provided with a long guide-in groove, so the 95/8-inch intermediate casing suspender can be guided into an inner cavity of a double-wellhead casing head 22; and through the gravity effect and the sufficient distance of the couplings, the original deviated 95/8-inch technical casing suspender is forcibly positioned in the center of the inner cavity of the double-wellhead casing head, so the installation of two 95/8-inch technical casings in the 26-inch conduit is realized. The double-wellhead device has the advantages that the wellhead space is saved; the double well heads can be arranged in a wellhole which originally allows the drilling of only one well; the investment cost of equipment is low; and the oil and gas productivity is obviously improved.
Description
Technical field
The present invention relates to a kind of twin-well vocal imitation skill field,, relate in particular to a kind of two wellhead assemblies that are applicable to 26 inches of conduits.
Background technology
In reality, a twin-well technique is routinely cannot in 26 inches of pit shafts, realize two 95/8 inch of protective casings are installed, main cause is because 26 inches of pit shaft inside dimensions are more limited, when 95/8 inch of protective casing is installed, will make two sleeve pipes draw close to center and just can not interfere 26 inches of shaft in wall, after Dan Xiang draws close at center, can cause again two, the upper strata fan-shaped flange of four-way junction of casing mutually to interfere, also not have at present a kind of technique to realize two 95/8 inch of protective casings are installed in 26 inches of conduits.
Therefore, design a kind of technique and relevant apparatus that two 95/8 inch of specification sleeve pipes are installed, inventor's problem to be solved just of realizing for overcoming the deficiency of above-mentioned technology in 26 inches of conduits.
Summary of the invention
For the deficiencies in the prior art, the object of this invention is to provide a kind of two wellhead assemblies that are applicable to 26 inches of conduits, the design does not install 95/8 inch of protective casing restriction because of 26 inches of pipe inner walls and upper strata four-way junction of casing, can be arranged on smoothly in 26 inches of conduits, save well head space, equipment investment cost is low, and oil and gas production improves obviously, has very high practical value.
The technical solution adopted for the present invention to solve the technical problems is: described in be applicable to two wellhead assemblies of 26 inches of conduits, described pair of wellhead assembly comprises two casing head of well heads, be installed on 95/8 inch of protective casing hanger in described pair of casing head of well head import, 95/8 inch of protective casing hanger bottom is provided with the long groove that imports, the well head cooperation place of described 95/8 inch of protective casing hanger and twin-well pipe box tube head is provided with joint ring, described 95/8 inch of protective casing hanger lower end is hung with 95/8 inch of protective casing, described pair of casing head of well head lower end is combined with 26 inches of conduits of two described 95/8 inch of protective casings of a parcel, between described 26 inches of conduits and described pair of casing head of well head inwall, be combined with sealing ring, described pair of casing head of well head bottom bolts is connected with down slips, described 95/8 inch of protective casing external surface is provided with box cupling, the distance of described 95/8 inch of protective casing hanger lower surface and 95/8 inch of protective casing external diameter intersection point to 95/8 inch protective casing box cupling starting point and described 95/8 inch of protective casing box cupling starting point to 95/8 inch protective casing box cupling starting point are more than or equal to 956.522 to box cupling external diameter horizontal-extending intersection point distance ratio, 95/8 inch of casing hanger and 95/8 inch of protective casing interference fit.
In above-mentioned design, 95/8 inch of protective casing is removed to the installing space that dwindles hanger and 95/8 inch of protective casing by be connected that female box cupling with hanger.Make to produce to interfere with 26 inches of conduit inner surfaces in the course of the work to make to install two 95/8 inch of protective casing saving well head spaces in 26 inches of conduits by increasing the distance of box cupling and described 95/8 inch of protective casing hanger lower surface and 95/8 inch of protective casing external diameter intersection point, equipment investment cost is low, improves oil and gas production.
As the design's better improvement, described casing hanger bottom is provided with the long groove that imports.The described long groove that imports is convenient to and two hangers is installed in a casing head.
As the design's better improvement, described sealing ring is two.Two sealing rings can ensure that 26 inches of conduits are difficult for occurring at casing head place leaking under 95/8 inch of protective casing extruding.
As the design's better improvement, the distance of described 95/8 inch of protective casing hanger lower surface and 95/8 inch of protective casing external diameter intersection point to 95/8 inch protective casing box cupling starting point is 11000mm, and described 95/8 inch of protective casing box cupling starting point to 95/8 inch protective casing box cupling starting point is 11.5mm to box cupling external diameter horizontal-extending intersection point distance.
The invention has the beneficial effects as follows: the present invention installs two 95/8 inch of protective casings at a well head and greatly saves well head space, at the pit shaft that originally can only bung down, twin-well mouth is installed, and equipment investment cost is low, and oil and gas production improves significantly.
Brief description of the drawings
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is structural representation of the present invention.
Wherein: 1, hanger; 2, two casing head of well heads, 3,26 inches of conduits, 4,95/8 inch of protective casing, 5, fall slips, 6, joint ring, 7, sealing ring, 8,95/8 inch of casing hanger lower surface and 95/8 inch of protective casing external diameter intersection point, 9,95/8 inches of protective casing box cupling starting points, 10,95/8 inches of protective casing box cupling starting points are to box cupling external diameter horizontal-extending intersection point, 11, box cupling, the 12. long grooves that import.
Detailed description of the invention
Below in conjunction with an embodiment of accompanying drawing narration, the invention will be further described.
Embodiment: in the drawings, the described two wellhead assemblies that are applicable to 26 inches of conduits 3 comprise two casing head of well heads 2, be installed on 95/8 inch of protective casing, 4 hangers 1 in described pair of casing head of well head 2 imports, 95/8 inch of protective casing 4 hanger 1 bottom is provided with the long groove 12 that imports, described 95/8 inch of protective casing, 4 hangers 1 are provided with joint ring 6 with the well head cooperation place of twin-well pipe box tube head, described 95/8 inch of protective casing 4 hanger 1 lower ends are hung with 95/8 inch of protective casing 4, described pair of casing head of well head 2 lower ends are combined with 26 inches of conduits 3 of two described 95/8 inch of protective casings 4 of a parcel, between described 26 inches of conduits 3 and described pair of casing head of well head 2 inwalls, be combined with sealing ring 7, described pair of casing head of well head bottom bolts is connected with down slips 5, described 95/8 inch of protective casing 4 external surface are provided with box cupling 11, the distance of described 95/8 inch of protective casing 4 hanger 1 lower surfaces and 8 to 95/8 inches of protective casing 4 box cupling 11 starting points 9 of 95/8 inch of protective casing 4 external diameter intersection point and 9 to 95/8 inches of protective casings of described 95/8 inch of protective casing 4 box cupling 11 starting points, 4 box cupling 11 starting points 9 are more than or equal to 956.522 to box cupling 11 external diameter horizontal-extending intersection point 10 distance ratio, 1 and 95/8 inch of protective casing 4 interference fit of 95/8 inch of protective casing 4 hanger.
In above-mentioned design, 95/8 inch of protective casing 4 is removed to the installing space that dwindles 1 and 95/8 inch of protective casing 4 of hanger by be connected that female box cupling 11 with hanger 1.Make to produce to interfere with 26 inches of conduits, 3 inner surfaces in the course of the work to make to save well head space at two 95/8 inch of protective casings 4 of an interior installation of 26 inches of conduits 3 by increasing box cupling 11 and the distance of described 95/8 inch of protective casing 4 hanger 1 lower surfaces and 95/8 inch of protective casing 4 external diameter intersection point, equipment investment cost is low, improves oil and gas production.
As the design's better improvement, described casing hanger 1 bottom is provided with the long groove 12 that imports.The described long groove 12 that imports is convenient to and two hangers 1 is installed in a casing head.
As the design's better improvement, described sealing ring 7 is two.Two sealing rings 7 can ensure that 26 inches of conduits 3 are difficult for occurring at casing head place leaking under 4 extruding of 95/8 inch of protective casing.
As the design's better improvement, the distance of described 95/8 inch of protective casing 4 hanger 1 lower surfaces and 8 to 95/8 inches of protective casing 4 box cupling 11 starting points 9 of 95/8 inch of protective casing 4 external diameter intersection point is 11000mm, and 9 to 95/8 inches of protective casings of described 95/8 inch of protective casing, 4 box cupling 11 starting points, 4 box cupling 11 starting points are 11.5mm to box cupling 11 external diameter horizontal-extending intersection point 10 distances.
In field-mounted process, 95/8 inch of protective casing 4 hanger 1 is directly connected with 95/8 inch of protective casing 4, instead of be indirectly connected by conventional double male joint and female box cupling, 95/8 inch of protective casing 4 hanger 1 top lifting tool that is threaded, hang 95/8 inch of protective casing 4 that more piece is connected below, the total Beijing South Maxpower Technology Co. Ltd of sleeve pipe reaches 350 tons, when setting of casing due to Action of Gravity Field, 95/8 inch of protective casing 4 can become flexible, thereby the box cupling 11 that makes 95/8 inch of protective casing 4 can be close to 26 inches of conduit 3 inwalls in lower going-into-well, in the time being lowered into 95/8 inch of protective casing 4 hanger 1, because 95/8 inch of protective casing, 4 hanger 1 bottoms import groove 12 from belt length, 95/8 inch of protective casing, 4 hangers 1 can be imported to two casing head of well head 22 inner chambers, enough far away of the distance of ordering due to Action of Gravity Field and A point and B, can make originally to depart from 95/8 inch of protective casing, 4 hangers 1 is centered in two casing head of well head 2 inner chambers by force, thereby realize two 95/8 inch of protective casings 4 of 26 inches of interior installations of conduit 3.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes manual of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (4)
1. one kind is applicable to two wellhead assemblies of 26 inches of conduits, it is characterized in that: described pair of wellhead assembly comprises two casing head of well heads, be installed on 95/8 inch of protective casing hanger in described pair of casing head of well head import, 95/8 inch of protective casing hanger bottom is provided with the long groove that imports, the well head cooperation place of described 95/8 inch of protective casing hanger and twin-well pipe box tube head is provided with joint ring, described 95/8 inch of protective casing hanger lower end is hung with 95/8 inch of protective casing, described pair of casing head of well head lower end is combined with 26 inches of conduits of two described 95/8 inch of protective casings of a parcel, between described 26 inches of conduits and described pair of casing head of well head inwall, be combined with sealing ring, described pair of casing head of well head bottom bolts is connected with down slips, described 95/8 inch of protective casing external surface is provided with box cupling, the distance of described 95/8 inch of protective casing hanger lower surface and 95/8 inch of protective casing external diameter intersection point to 95/8 inch protective casing box cupling starting point and described 95/8 inch of protective casing box cupling starting point to 95/8 inch protective casing box cupling starting point are more than or equal to 956.522 to box cupling external diameter horizontal-extending intersection point distance ratio, 95/8 inch of casing hanger and 95/8 inch of protective casing interference fit.
2. a kind of two wellhead assemblies that are applicable to 26 inches of conduits according to claim 1, is characterized in that: described casing hanger bottom is provided with the long groove that imports.
3. a kind of two wellhead assemblies that are applicable to 26 inches of conduits according to claim 1, is characterized in that: described sealing ring is two.
4. a kind of two wellhead assemblies that are applicable to 26 inches of conduits according to claim 1, it is characterized in that: the distance of described 95/8 inch of protective casing hanger lower surface and 95/8 inch of protective casing external diameter intersection point to 95/8 inch protective casing box cupling starting point is 11000mm, described 95/8 inch of protective casing box cupling starting point to 95/8 inch protective casing box cupling starting point is 11.5mm to box cupling external diameter horizontal-extending intersection point distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410258135.8A CN104033125B (en) | 2014-06-11 | 2014-06-11 | A kind of double-wellhead device being applicable to 26 inch conduit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410258135.8A CN104033125B (en) | 2014-06-11 | 2014-06-11 | A kind of double-wellhead device being applicable to 26 inch conduit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104033125A true CN104033125A (en) | 2014-09-10 |
| CN104033125B CN104033125B (en) | 2016-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410258135.8A Expired - Fee Related CN104033125B (en) | 2014-06-11 | 2014-06-11 | A kind of double-wellhead device being applicable to 26 inch conduit |
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| CN (1) | CN104033125B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156053A (en) * | 2015-07-30 | 2015-12-16 | 江苏金石科技有限公司 | Double-pipe oil pipe hanger with sealing sleeve structure |
| CN107916891A (en) * | 2016-10-08 | 2018-04-17 | 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2469171Y (en) * | 2001-03-07 | 2002-01-02 | 刘学高 | Casing head of borehole of oil or gas |
| RU2269641C1 (en) * | 2005-01-18 | 2006-02-10 | Общество с ограниченной ответственностью "ЛУКОЙЛ-ПЕРМЬ" | Wellhead equipment (variants) |
| CN201180511Y (en) * | 2007-11-30 | 2009-01-14 | 南京伟业机械有限公司 | Gas injection, oil extraction shaft mouth apparatus |
| CN101509360A (en) * | 2009-03-20 | 2009-08-19 | 江苏金石油气井口科技有限公司 | Multi-base fast-assembling wellhead apparatus |
| CN202493236U (en) * | 2012-03-19 | 2012-10-17 | 盐城三益石化机械有限公司 | Separate type double-barreled hanger assembly |
| CN202755939U (en) * | 2012-07-26 | 2013-02-27 | 江苏金石科技有限公司 | Integral type casing head single-barrel twin-well well head device |
-
2014
- 2014-06-11 CN CN201410258135.8A patent/CN104033125B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2469171Y (en) * | 2001-03-07 | 2002-01-02 | 刘学高 | Casing head of borehole of oil or gas |
| RU2269641C1 (en) * | 2005-01-18 | 2006-02-10 | Общество с ограниченной ответственностью "ЛУКОЙЛ-ПЕРМЬ" | Wellhead equipment (variants) |
| CN201180511Y (en) * | 2007-11-30 | 2009-01-14 | 南京伟业机械有限公司 | Gas injection, oil extraction shaft mouth apparatus |
| CN101509360A (en) * | 2009-03-20 | 2009-08-19 | 江苏金石油气井口科技有限公司 | Multi-base fast-assembling wellhead apparatus |
| CN202493236U (en) * | 2012-03-19 | 2012-10-17 | 盐城三益石化机械有限公司 | Separate type double-barreled hanger assembly |
| CN202755939U (en) * | 2012-07-26 | 2013-02-27 | 江苏金石科技有限公司 | Integral type casing head single-barrel twin-well well head device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156053A (en) * | 2015-07-30 | 2015-12-16 | 江苏金石科技有限公司 | Double-pipe oil pipe hanger with sealing sleeve structure |
| CN107916891A (en) * | 2016-10-08 | 2018-04-17 | 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 |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104033125B (en) | 2016-08-03 |
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Granted publication date: 20160803 Termination date: 20210611 |