CN203308396U - High-strength oil casing joint with metal interference seal - Google Patents
High-strength oil casing joint with metal interference seal Download PDFInfo
- Publication number
- CN203308396U CN203308396U CN2012203646765U CN201220364676U CN203308396U CN 203308396 U CN203308396 U CN 203308396U CN 2012203646765 U CN2012203646765 U CN 2012203646765U CN 201220364676 U CN201220364676 U CN 201220364676U CN 203308396 U CN203308396 U CN 203308396U
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- China
- Prior art keywords
- metal interference
- thread
- casing joint
- taper
- interference sealing
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- Expired - Fee Related
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Abstract
Provided is a high-strength oil casing joint with a metal interference seal. The high-strength oil casing joint with the metal interference seal is composed of an outer threaded end at one end and an inner threaded end at the other end, threads are taper threads, the two ends of the inner threaded end and the two ends of the outer threaded end are provided with shoulders, the connection portion of a casing comprises torque shoulders, the taper threads and the metal interference seal of the pipe end position, the metal interference seal of the pipe end position is composed of a cylindrical surface and a circular cone surface, a transition section is arranged between the cylindrical surface and the circular cone surface, the conicity of the taper threads is 1:15, the thread pitch is 6-9 buckles per inch, and the tooth type of the taper threads is a buttress thread of which the half angle on the stretching side is 4 degrees and the half angle of the compression side is 11 degrees.
Description
Technical field
The utility model relates to the oil well pipe casing joint, relates in particular to the high strength petroleum casing joint with the metal interference sealing.
Background technology
The exploitation of oil-gas resource realizes by setting up Oil/gas Well.The borehole wall of Oil/gas Well is a kind of steel pipe that is called petroleum casing pipe, be formed by connecting its two ends screw thread by root casing string.In order to ensure this casing string, can work, at casing string, complete connection (being called " setting of casing ") in well after, need be between casing string external diameter and well, more than shaft bottom, inject cement in certain height, sleeve pipe is fixed to (being called " well cementation ").When well cementation, a key factor that affects its quality is that enough well cementation annular spaces will be arranged, i.e. semidiameter between well internal diameter and casing string external diameter.For casing string, its maximum outside diameter is in its connecting portion; Therefore, under the controlled condition of well internal diameter, reduce the external diameter of casing joint, just can improve the well cementation annular space, and then obtain the effect that improves the casing string cementing quality.For casing joint, its form of structure divides box cupling to connect and integrated connection (claim again: direct linkage type, be connected without box cupling), and the former external diameter greatly, latter's external diameter relatively can be little.
Existing integrated connection sleeve pipe has the straight-connecting sleeve pipe of API standard, and without the box cupling splicing sleeve.The straight-connecting sleeve pipe internal thread section start of API standard has an imperfect tooth section, its profile of tooth is: from apart from torque shoulder face a distance (establish its for L), tangent with the face of cylinder and a tapered tread identical with diameter at the bottom of this place's thread, fillet at the bottom of staying the tooth item parts of tapered tread and keeping the tooth of tapered tread, be exactly the thread tooth of its imperfect tooth, referring to Fig. 1.According to this regulation, the profile of tooth of imperfect tooth at L place, with the complete tooth of screw thread, fit like a glove (the two round and smooth being connected) and from the L place the width of gullet base increase gradually, until in end, reach the maximum; Wherein the tooth top bus of imperfect tooth section all locate on the taper seat identical with complete tooth section, on the tooth root bus Jun Chu face of cylinder, the thread taper of complete tooth section is 1: 8.At the small end of joint, one tapering being arranged is the metal interference sealing surface (external screw thread is the conical surface+arc surface) of 1: 6.The imperfect profile of tooth of the internal thread of this sleeve pipe is difficult to processing, and the sealing performance of conical surface seal is subject to the impact of tensile load.Though existing, cancelled as above imperfect tooth without the box cupling splicing sleeve, because not establishing the metal interference sealing, so the sealing performance of joint is restricted.
Summary of the invention
The purpose of this utility model is to provide a kind of high strength petroleum casing joint with the metal interference sealing, it has increased the metal interference sealing, make to be improved without the sealing performance of box cupling splicing sleeve joint, and adopt high strength steel to make the durability of casing joint itself strengthen, adapt to the service demand of oil well and gas well.
The utility model is achieved in that a kind of high strength petroleum casing joint with the metal interference sealing, by containing one of male end and female end other end, form, screw thread is taper thread, there is shoulder at the two ends of internal and external screw thread pipe end, the connecting portion of sleeve pipe comprises torque shoulder and taper thread, the connecting portion that it is characterized in that sleeve pipe also comprises the metal interference sealing of pipe end place, and metal interference sealing in pipe end place is comprised of the face of cylinder and taper seat, and a changeover portion is arranged between the face of cylinder and taper seat.With the high strength petroleum casing joint of metal interference sealing, the tapering of tapered tread is 1: 15, pitch 6～9 buttons/inch, and profile of tooth is the buttress thread of tensile side half-angle 4 degree and compressed side half-angle 11 degree.
With the high strength petroleum casing joint of metal interference sealing, metal interference sealing in pipe end place is in externally threaded top, and the end of internal thread.
The utility model is the top at the screw thread that contains the male end joint, it is also the end that contains the screw thread of female end joint, it is the connecting portion of sleeve pipe, increased the metal interference sealing, by pipe end by the face of cylinder, the hermetically-sealed construction of changeover portion and taper seat combination is realized the metal interference sealing, on the basis that has retained original outer torque shoulder and taper thread sealing, increased the internal torque shoulder, the sealing performance of integrated connection petroleum sleeve joint is greatly improved, and adopt high strength steel to make the durability of casing joint itself strengthen, can be used for the casing joint of oil well and gas well.
The accompanying drawing explanation
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is the straight-connecting sleeve pipe structural representation of existing API standard;
Fig. 2 is the integrated connection petroleum sleeve joint structural representation of the utility model band metal interference sealing;
Fig. 3 is the local enlarged diagram of I section in Fig. 2.
In figure: 1 outer shoulder, 3 faces of cylinder, 4 changeover portions, 5 taper seats, 6 interior shoulders, 7 taper threads, 8 male end, 9 female end; 11 faces of cylinder, 12 torque shoulder faces, 13 imperfect teeth, 14 complete teeth, 15 metal interference sealing surfaces.
The specific embodiment
Referring to Fig. 2, Fig. 3, a kind of high strength petroleum casing joint with the metal interference sealing, by containing 8 one of male end and female end 9 other ends, form, screw thread is taper thread 7, there is shoulder at the two ends of internal and external screw thread pipe end 9,8, and the connecting portion of sleeve pipe comprises torque shoulder, taper thread 7, the sealing of pipe end place metal interference.Torque shoulder is two shoulders, outer shoulder 1 and interior shoulder 6 are the metal interference sealing of 90 degree pipe end places and are in externally threaded top, with the end of internal thread, metal interference sealing in pipe end place is comprised of the face of cylinder 3 and taper seat 5, and 5 of the face of cylinder 3 and taper seats have a changeover portion 4.The tapering of tapered tread 7 is 1: 15, pitch 6～9 buttons/inch, and profile of tooth is the buttress thread of tensile side half-angle 4 degree and compressed side half-angle 11 degree.
Finally explanation is, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although with reference to preferred embodiment, the utility model is had been described in detail, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical solution of the utility model, and not breaking away from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (2)
1. high strength petroleum casing joint with the metal interference sealing, by containing one of male end and female end other end, form, screw thread is taper thread, in, there is shoulder at the two ends of male end of a pipe, the connecting portion of sleeve pipe comprises torque shoulder and taper thread, the connecting portion that it is characterized in that sleeve pipe comprises the metal interference sealing of pipe end place, the metal interference sealing of pipe end place is comprised of the face of cylinder and taper seat, one changeover portion is arranged between the face of cylinder and taper seat, the tapering of tapered tread is 1: 15, pitch 6-9 button/inch, flute profile is the buttress thread of tensile side half-angle 4 degree and compressed side half-angle 11 degree.
2. the high strength petroleum casing joint with the metal interference sealing according to claim 1 is characterized in that: metal interference sealing in pipe end place is in externally threaded top, and the end of internal thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203646765U CN203308396U (en) | 2012-07-26 | 2012-07-26 | High-strength oil casing joint with metal interference seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203646765U CN203308396U (en) | 2012-07-26 | 2012-07-26 | High-strength oil casing joint with metal interference seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203308396U true CN203308396U (en) | 2013-11-27 |
Family
ID=49614612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012203646765U Expired - Fee Related CN203308396U (en) | 2012-07-26 | 2012-07-26 | High-strength oil casing joint with metal interference seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203308396U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653123A (en) * | 2015-02-05 | 2015-05-27 | 江苏常宝钢管股份有限公司 | Coupling-free direct connecting spinning joint oil pipe |
| CN105909183A (en) * | 2016-06-15 | 2016-08-31 | 东营威玛石油钻具有限公司 | Screwed joint of high-torsion-resistance drilling tool |
-
2012
- 2012-07-26 CN CN2012203646765U patent/CN203308396U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104653123A (en) * | 2015-02-05 | 2015-05-27 | 江苏常宝钢管股份有限公司 | Coupling-free direct connecting spinning joint oil pipe |
| CN105909183A (en) * | 2016-06-15 | 2016-08-31 | 东营威玛石油钻具有限公司 | Screwed joint of high-torsion-resistance drilling tool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131127 Termination date: 20160726 |