120 steel grade drill pipe and manufacturing process method thereof
A manufacturing process and drill pipe technology, which is applied in the field of petroleum drilling engineering and mechanical processing, can solve the problems of small diameter of the inner hole of the male joint, small flow cross section, brittle fracture, etc. performance effect
Inactive Publication Date: 2009-11-18
盘锦辽河油田派普钻具制造有限公司
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For the actual working conditions of drilling engineering, the strength of G105 steel grade drill pipe is low, while the strength of S135 drill pipe exceeds 135Ksi, but the diameter of the inner hole of the male joint is small, t
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[0010] Describe below in conjunction with accompanying drawing.
[0011] As shown in the figure, the 120 steel grade drill pipe provided by the present invention is composed of a male joint 1, a drill pipe body 2 and a female joint 3. In the figure, the labels "4" and "5" are respectively the male joint 1 and the female joint 3 The weld seam that is butt welded with the drill pipe 2. The components and the overall manufacturing process of the drill pipe are as described above.
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Abstract
The invention relates to a 120 steel grade drill pipe and a manufacturing process method thereof. A pipe body of the 120 steel grade drill pipe is made of 27CrMnMo, and subs are made of AISI4137HM, wherein the subs comprise the following chemical compositions by mass percentage: less than or equal to 0.40 percent of C, less than or equal to 0.015 percent of S, less than or equal to 0.010 percent of P, less than or equal to 0.009 percent of N, and less than or equal to 0.005 percent of B, sizes of the pin and box subs are the same as that of a G105 drilling tool, and mechanical properties respectively comprise that: the yield strength is between 130 and 150Ksi, the elongation rate is more than or equal to 17 percent, the brinell hardness HB is between 290 and 330, the longitudinal ballistic work is 80J, the transverse ballistic work is 60J, and the contraction of cross-section area is more than or equal to 45 percent. The manufacturing process method for the drill pipe comprises the steps such as pipe body manufacturing, sub manufacturing, butt welding and the other processes. The 120 steel grade drill pipe has excellent mechanical properties, is suitable for deep drilling with a depth between 4,000 and 5,000m, is favorable for the hydraulic drilling effect during the drilling due to the enlargement of inner holes of the stubs, can full play the function of a high-power drilling pump, and improve mechanical drilling rate; and the manufacturing process method has the advantages of easy implementation, practicability, reliability and excellent effect.
Description
Technical field: [0001] The invention relates to a drilling tool used for oil drilling engineering, especially medium-deep well drilling and its manufacturing process, which belongs to the oil drilling engineering and mechanical processing technology category. Background technique: [0002] Oil drill pipe is an important tool and consumable in the process of oil drilling. With the development of the oil and gas industry and the gradual reduction and depletion of shallow oil and gas layers, the drilling depth has gradually increased from about 2000m to about 4000m, and some wells have reached more than 4000m. , Exploration well depth reaches 5000-7000m, even reaches 10000m. Due to the increase in drilling depth, the drilling rigs and drilling tools used in the drilling construction process need to be upgraded accordingly to replace the original shallow drilling equipment and tools. At present, the drill pipes used in oil drilling on site usually adopt the manufacturing stand...
Claims
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IPC IPC(8): E21B17/00C22C38/22C22C38/00C21D9/08C21D1/18C23C8/32C23C8/56C23C8/76
Inventor 张树轩朱俊昌李森陆成山李刚姜枫李娜隋志新
Owner 盘锦辽河油田派普钻具制造有限公司
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