CN202926237U - Heavy caliber double-thread oil casing - Google Patents

Heavy caliber double-thread oil casing Download PDF

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Publication number
CN202926237U
CN202926237U CN 201220515415 CN201220515415U CN202926237U CN 202926237 U CN202926237 U CN 202926237U CN 201220515415 CN201220515415 CN 201220515415 CN 201220515415 U CN201220515415 U CN 201220515415U CN 202926237 U CN202926237 U CN 202926237U
Authority
CN
China
Prior art keywords
thread
heavy caliber
caliber double
petroleum casing
casing pipe
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
Application number
CN 201220515415
Other languages
Chinese (zh)
Inventor
武磊
孙世杰
矫健
张国辉
张博
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tianjin Dehua Petroleum Equipment Manufacturing Co Ltd
Original Assignee
Tianjin Dehua Petroleum Equipment Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tianjin Dehua Petroleum Equipment Manufacturing Co Ltd filed Critical Tianjin Dehua Petroleum Equipment Manufacturing Co Ltd
Priority to CN 201220515415 priority Critical patent/CN202926237U/en
Application granted granted Critical
Publication of CN202926237U publication Critical patent/CN202926237U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses a heavy caliber double-thread oil casing which comprises a casing body, a male connector end is arranged at one end of the casing body, the male connector end is provided with an outer thread, a female connector end with an inner thread is arranged at the other end of the casing body, the inner thread is matched with the outer thread, so that multiple oil casings can be mutually connected by matching of the male connector end and the female connector end in a corresponding mode. By the adoption of the heavy caliber double-thread oil casing, compared with the prior art, the heavy caliber double-thread oil casing has the advantages of being easy to buckle, rapid in buckling speed, and high in efficiency. In factors, such as mechanics performance, the heavy caliber double-thread oil casing is equal to casing base materials, in the process of operation, use performance is not affected due to the fact that the buckling speed is fast and connection strength of threads is high.

Description

Heavy caliber double thread petroleum casing pipe
Technical field
The present invention relates to a kind of petroleum works downhole tubular goods, especially a kind of heavy caliber double thread petroleum casing pipe.
Background technology
Heavy caliber petroleum is applicable to each elephants such as domestic Tarim Basin, grand celebration, the Liaohe River, Xinjiang (Kelamayi), Bohai Bay Oil, oil field, the East Sea, Eastern South China Sea, THE WESTERN SOUTH CHINA SEA and triumph with series sleeve, be applied to exploration and the production of Oil/gas Well mainly as surface pipe.
In recent years along with shift to western part in the main battlefield of China's oil, natural gas exploration and development, the strategy of " Stabilizing Oil Production of Eastern China, development western " forms.The oil well in west area belongs to deep-well mostly, and complex geologic conditions, and this just has higher requirement to kind, the specification of sleeve pipe.Develop oil, the gas deep-well of this complex geologic conditions, J 55 grade of steels are generally adopted with major diameter (609.60mm) petroleum casing pipe in the oil field; Along with the exploitation of offshore oil, also increasing to the demand of Large-sized High-strength Oil Casing.
For large-sized oil casing, if the mode that adopts API round thread or buttress thread to connect, threading on body, machining internal thread on box cupling, internal and external screw thread is connected to form tubing string, this form that is threaded, and pipe diameter is little, the box cupling diameter is large, and pipe is comparatively difficult under some specific occasion; Simultaneously, the screw thread processing difficulties is difficult for make-up, and make-up speed is slower.
Summary of the invention
The objective of the invention is to overcome defective of the prior art, provide a kind of installation convenient, be easy to make-up, and make-up speed is fast, bonding strength is high, the heavy caliber double thread petroleum casing pipe of good mechanical performance.
For addressing the above problem, a kind of heavy caliber double thread petroleum casing pipe of the present invention comprises sleeve body, it is characterized in that: an end of described body is for being provided with externally threaded public access head end, and the body other end is for arranging female female joint end; Described internal and external screw thread can cooperatively interact, thereby makes a plurality of petroleum casing pipes can be corresponding to interconnecting public access head end and coordinating of female joint end.
Described screw thread is saw-tooth thread, comprises bearing surface, non-bearing face, crest top land and root face; Wherein crest top land, root face parallel with pitch diameter of thread line, and the tapering of pitch diameter of thread line is 1:7.5.
The angle α of described bearing surface and body axis vertical plane is negative 3 °.
The angle β of described non-bearing face and crest top land is 60 °.
Adopt the heavy caliber double thread petroleum casing pipe of structure of the present invention, compared with prior art have following beneficial effect: 1) easily make-up, make-up speed are fast, and efficient is high, the shackle activity duration approximately 50%~70% in saving; 2) be equal to the sleeve pipe mother metal at aspects such as mechanical properties, can't affect because make-up speed is fast functional performance during operation; 3) intensity that is threaded is high, reaches 100% of body.
Description of drawings
Fig. 1 is the structural representation of heavy caliber double thread petroleum casing pipe of the present invention.
Fig. 2 is the structural representation of threaded portion in heavy caliber double thread petroleum casing pipe of the present invention.
Fig. 3 is the partial enlarged drawing of A section in Fig. 2.
In figure: body 1; External screw thread 2a; Internal thread 2b; Bearing surface 201; Non-bearing face 202; Crest top land 203; Root face 204; Public access head end 3a; Female joint end 3b; Pitch diameter of thread line L; Body axis H; The angle α of bearing surface and body axis vertical plane; The angle β of non-bearing face and crest top land
The specific embodiment
In order to make those skilled in the art person understand better technical solution of the present invention, the present invention is described in further detail below in conjunction with drawings and embodiments.
As shown in Figure 1, 2, heavy caliber double thread petroleum casing pipe of the present invention comprises sleeve body 1, and an end of described body 1 is the public access head end 3a that is provided with external screw thread 2a, and the body other end is the female joint end 3b that is provided with internal thread 2b; Described internal and external screw thread 2b, 2a can cooperatively interact, thereby a plurality of petroleum casing pipes can corresponding be interconnected with coordinating of female joint end 3b by public access head end 3a, thereby saved the box cupling structure of traditional API standard, be convenient to petroleum casing pipe in the assembling of multiple occasion.
Described internal and external screw thread 2b, 2a are saw-tooth thread, comprise bearing surface 201, non-bearing face 202, crest top land 203 and root face 204; Wherein crest top land 203, root face 204 parallel with pitch diameter of thread line L, and the tapering of pitch diameter of thread line L is 1:7.5, and the angle β of described non-bearing face and crest top land is 60 °.The petroleum casing pipe of this structure, the easy make-up of internal and external screw thread 2b, 2a, make-up speed are fast, and efficient is high, can save the shackle activity duration approximately 50%~70%.
Described bearing surface 201 is negative 3 ° with the angle α of body axis H vertical plane, as shown in Figure 3, it is outward-dipping 3 ° of bearing surface on external screw thread 2b, bearing surface on internal thread 2a slopes inwardly 3 °, thereby when making between bearing surface interlock mutually, can guarantee that between internal and external screw thread 2b, 2a, bonding strength is high, reach 100% of body, and be equal to the sleeve pipe mother metal at aspects such as mechanical properties, can't affect because make-up speed is fast functional performance during operation.
The above is only the preferred embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (4)

1. a heavy caliber double thread petroleum casing pipe, comprise sleeve body, it is characterized in that: an end of described body is for being provided with externally threaded public access head end, and the body other end is for arranging female female joint end; Described internal and external screw thread can cooperatively interact, thereby makes a plurality of petroleum casing pipes can be corresponding to interconnecting public access head end and coordinating of female joint end.
2. heavy caliber double thread petroleum casing pipe as claimed in claim 1, it is characterized in that: described screw thread is saw-tooth thread, comprises bearing surface, non-bearing face, crest top land and root face; Wherein crest top land, root face parallel with pitch diameter of thread line, and the tapering of pitch diameter of thread line is 1:7.5.
3. heavy caliber double thread petroleum casing pipe as claimed in claim 2, it is characterized in that: the angle α of described bearing surface and body axis vertical plane is negative 3 °.
4. heavy caliber double thread petroleum casing pipe as claimed in claim 3, it is characterized in that: the angle β of described non-bearing face and crest top land is 60 °.
CN 201220515415 2012-10-09 2012-10-09 Heavy caliber double-thread oil casing Expired - Lifetime CN202926237U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220515415 CN202926237U (en) 2012-10-09 2012-10-09 Heavy caliber double-thread oil casing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220515415 CN202926237U (en) 2012-10-09 2012-10-09 Heavy caliber double-thread oil casing

Publications (1)

Publication Number Publication Date
CN202926237U true CN202926237U (en) 2013-05-08

Family

ID=48216210

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220515415 Expired - Lifetime CN202926237U (en) 2012-10-09 2012-10-09 Heavy caliber double-thread oil casing

Country Status (1)

Country Link
CN (1) CN202926237U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107208461A (en) * 2011-08-05 2017-09-26 瓦卢瑞克石油天然气法国有限公司 The pipe joint of the self-locking thread shape of petroleum industry

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107208461A (en) * 2011-08-05 2017-09-26 瓦卢瑞克石油天然气法国有限公司 The pipe joint of the self-locking thread shape of petroleum industry

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Granted publication date: 20130508