CN201778666U - Non-coupling petroleum casing pipe - Google Patents
Non-coupling petroleum casing pipe Download PDFInfo
- Publication number
- CN201778666U CN201778666U CN2010202754443U CN201020275444U CN201778666U CN 201778666 U CN201778666 U CN 201778666U CN 2010202754443 U CN2010202754443 U CN 2010202754443U CN 201020275444 U CN201020275444 U CN 201020275444U CN 201778666 U CN201778666 U CN 201778666U
- Authority
- CN
- China
- Prior art keywords
- internal thread
- casing
- annular
- external thread
- coupling
- 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
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- 239000003208 petroleum Substances 0.000 title claims abstract description 16
- 238000010168 coupling process Methods 0.000 title abstract description 12
- 238000005859 coupling reaction Methods 0.000 title abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 230000008878 coupling Effects 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 2
- 239000011324 bead Substances 0.000 abstract 2
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- Earth Drilling (AREA)
Abstract
A non-coupling petroleum casing is applied to the technical field of oil field well cementation. One end of the body is an external thread end, the other end of the body is an internal thread end, and the root of the external thread is provided with an annular external shoulder; the internal thread end of the oil pipe body is provided with an internal thread. The external thread end is connected with the internal thread end through screwing. The internal thread and the external thread are hook-type threads with negative angles, and cone sealing surfaces are respectively arranged at two end parts of the internal thread and the external thread. The outer circular bead of the external thread end and the upper end surface of the internal thread end are annular planes; the inner circular bead of the internal thread end and the lower end surface of the external thread end are annular conical surfaces. The effect is as follows: the basic function of petroleum casing connection can be realized, a casing coupling is omitted, and the problems of large outer diameter and small annular space gap between a common casing coupling and a well wall are solved by directly connecting an internal thread processed on one casing with an external thread processed on the other casing.
Description
Technical field
The utility model relates to the reinforcing oil well technical field, particularly specialized barrel under the producing well.
Background technology
In traditional oil gas well drilling operation, must in boring good well, be lowered to steel pipe column the borehole wall is reinforced, and to carrying out packing in the stratum, the length of this steel pipe column can change according to the degree of depth of well, may not wait to thousands of rice from hundreds of rice.This steel pipe column is that the sleeve pipe (steel pipe) that relies on single Zhi Changdu to be about 10 meters couples together and constitutes.Usually be connected by box cupling between sleeve pipe and the sleeve pipe, at the two ends of sleeve pipe threading, externally threaded length is about about 0.5 meter.At short steel pipes two ends machining internal thread, this short steel pipes of having processed internal thread is called casing coupling, and casing coupling will have been processed externally threaded steel pipe and couple together with the stubborn form of closing of screw thread.Require thread connection to possess tensile strength, collapse resistance and sealing intensity.
The threaded connection device that generally adopts is the API standard thread coupling arrangement of producing according to the relevant specification of American Petroleum Institute (API) (the English API of abbreviation) at present.Along with the harshnessization of oil-gas mining condition, API standard thread coupling arrangement can not satisfy the needs of field produces.
Given this present situation, the domestic and international main various sleeve pipe special thread of the numerous and confused Development and Production of petroleum casing pipe manufacturing enterprise coupling arrangement, the structure of these threaded connection devices and sealing principle are different with the API threaded connection device, and coupling arrangement and sealing principle between each producer are also different.Chinese patent publication number: CN201013256 provides " a kind of thick oil thermal extraction casing joint ".Be applicable to that the steam injection temperature is 350 ℃～400 ℃ thick oil thermal extraction exploitation use, replaces the common API joint that uses at present.
The utility model content
The purpose of this utility model is: a kind of no box cupling petroleum casing pipe is provided, can realizes the basic function that petroleum casing pipe connects, and save casing coupling, directly be connected with the external screw thread of processing on another branch casing at the internal thread on the branch casing by processing.
The technical solution adopted in the utility model is: no box cupling petroleum casing pipe, mainly to form by body, and body is a round tube, one end of body is a male end, the other end is a female end, and the male end of oil pipe body is processed with external screw thread, shoulder outside externally threaded root has an annular; The female end of oil pipe body is processed with internal thread.Male end is connected by screwing with female end.It is characterized in that: described internal thread and external screw thread are the hook-type screw threads of negative angle, at internal thread and externally threaded both ends the cone sealing surface are arranged respectively.The outer shoulder of male end and the upper surface of female end are planar annular; The interior shoulder of female end and the lower surface of male end are the annular cones face.
The tapering of cone sealing surface is 1: 10, and the gradient of annular cones face is 1: 2.5.
Interior shoulder can prevent that external screw thread excessively is screwed into internal thread, absorbs a part of torque wrench moment simultaneously, thereby significantly reduces the moment of torsion that screw thread is shared, and reduces the stress level of threaded portion, and last button back produces certain axial interference; Outer shoulder 2 plays the effect of auxiliary seal.
The beneficial effects of the utility model: the utility model does not have the box cupling petroleum casing pipe, realize the basic function that petroleum casing pipe connects, saved casing coupling, directly be connected with the external screw thread of processing on another branch casing at the internal thread on the branch casing by processing, the bonding strength height, the sealing load height.Solve the little problem of annular clearance between the big and borehole wall of ordinary casing box cupling external diameter, and satisfy the casing joint requirement of strength.
Description of drawings
Fig. 1 is that the utility model does not have box cupling petroleum casing pipe structural profile schematic diagram.
Among the figure, 1. male end, 2. outer shoulder, 3. screw thread, 4. column sealed, 5. in shoulder, 6. female end.
The specific embodiment
Embodiment 1: with a no box cupling petroleum casing pipe is example, and the utility model is described in further detail.
Consult Fig. 1.The utility model does not have the box cupling petroleum casing pipe, mainly is made up of body, and body is a round tube, 10 meters of length.One end of body is a male end 1, and the other end is a female end 6, and the male end 1 of oil pipe body is processed with external screw thread, shoulder outside externally threaded root has an annular; The female end 6 of oil pipe body is processed with internal thread.Male end is connected by screwing with female end.
Described internal thread and external screw thread are the hook-type screw threads of negative angle, and promptly screw thread 3 adopts the hook-type screw thread of band negative angle, and the angle of bearing surface is 8 degree for negative 3 degree, approaching face angle.At internal thread and externally threaded both ends cone sealing surface 4 is arranged respectively, the tapering of cone sealing surface 4 is 1: 10.The outer shoulder 2 of male end 1 and the upper surface of female end 6 are planar annular; The interior shoulder 5 of female end 6 and the lower surface of male end 1 are the annular cones face, and the gradient of annular cones face is 1: 2.5.
Claims (2)
1. a no box cupling petroleum casing pipe mainly is made up of body, and body is a round tube, one end of body is male end (1), the other end is female end (6), and the male end of oil pipe body (1) is processed with external screw thread, shoulder outside externally threaded root has an annular; The female end of oil pipe body (6) is processed with internal thread, it is characterized in that: described internal thread and external screw thread are the hook-type screw threads of negative angle, at internal thread and externally threaded both ends cone sealing surface (4) are arranged respectively; The outer shoulder (2) of male end (1) and the upper surface of female end (6) are planar annular; The interior shoulder (5) of female end (6) and the lower surface of male end (1) are the annular cones face.
2. no box cupling petroleum casing pipe according to claim 1 is characterized in that: the tapering of cone sealing surface (4) is 1: 10, and the gradient of annular cones face is 1: 2.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202754443U CN201778666U (en) | 2010-07-28 | 2010-07-28 | Non-coupling petroleum casing pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202754443U CN201778666U (en) | 2010-07-28 | 2010-07-28 | Non-coupling petroleum casing pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201778666U true CN201778666U (en) | 2011-03-30 |
Family
ID=43791879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202754443U Expired - Lifetime CN201778666U (en) | 2010-07-28 | 2010-07-28 | Non-coupling petroleum casing pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201778666U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265191A (en) * | 2014-09-28 | 2015-01-07 | 天津德华石油装备制造有限公司 | TTGM-7 directly-connected special thread structure oil casing |
-
2010
- 2010-07-28 CN CN2010202754443U patent/CN201778666U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104265191A (en) * | 2014-09-28 | 2015-01-07 | 天津德华石油装备制造有限公司 | TTGM-7 directly-connected special thread structure oil casing |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110330 |