Pumping rods with miter rod heads
A sucker rod and rod head technology is applied in the field of components and sucker rods, which can solve the problems of inconvenient lifting and disassembly, and achieve the effects of convenient assembly and disassembly and good tensile and torsional performance.
Active Publication Date: 2012-10-17
葫芦岛龙源采油配套设备有限公司
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Problems solved by technology
The disadvantage of the drill pipe thread direct connection is that it is not easy to lift and disassemble
Method used
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Embodiment Construction
[0016] According to the picture:
[0017] One end of the sucker rod 1 is provided with a rod head 1.1, and the rod head is provided with a rod head sliding part 1.2 and a miter surface 1.3;
[0018] Two sucker rods with mitered surfaces and rod head sliding parts are connected by internal thread ferrule 2.1 and external thread ferrule 2.2 to form an internal thread ferrule rod head sliding chamber 2.11 and an external thread ferrule rod head sliding chamber The sucker rod column is formed in the rod head cavity of 2.21;
[0019] Wherein, the internally threaded ferrule rod head cavity is provided with an internally threaded ferrule rod head sliding cavity and an internal thread 2.12;
[0020] An external thread 2.22 and an empty knife portion 2.23 are provided at the outer end of the external thread ferrule, and a sliding cavity 2.21 of the rod head of the external thread ferrule is provided on one side of the external thread ferrule.
[0021] The installation distance betwe...
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The invention provides pumping rods with miter rod heads. One end of each pumping rod is provided with the rod head which is provided with a rod head sliding part and a miter; two pumping rods with the miters and the rod head sliding parts are spirally connected with each other through an inner thread sleeve hoop and an outer thread sleeve hoop to form a pumping rod string in a rod head cavity with an inner thread sleeve hoop rod head sliding cavity and an outer thread sleeve hoop rod head sliding cavity; the inner thread sleeve hoop rod head sliding cavity and an inner thread are arranged in an inner thread sleeve hoop rod head cavity; one end outside the outer thread sleeve hoop is provided with an outer thread and an undercut part; and the outer thread sleeve hoop rod head sliding cavity is arranged on one side of the outer thread sleeve hoop. The pumping rod heads at two ends are provided with the complementary miters, so that the pumping rods are high in tensile strength after being connected, can be assembled and disassembled quickly and conveniently, have the advantage of preventing tripping and eccentric wear and are suitable to be used as rotation pumping rods or reciprocating pumping rods.
Description
technical field [0001] The invention provides components in the field of oil production machinery, in particular a sucker rod with a mitered surface rod head. Background technique [0002] According to the process of screw pump oil production, the requirement for the sucker rod string is to bear both tension and torsion, but the most important thing is to bear torsion. The existing types of sucker rod head transmission torque in my country: one is various fork interface types, and the other is direct connection type of drill pipe thread. The disadvantage of the fork interface joint is that the fork interface is prone to breakage. The disadvantage of the drill pipe threaded direct connection is that it is not easy to lift and disassemble. Even when starting a well, the sucker rod head needs to be sawed off. Contents of the invention [0003] In order to overcome the disadvantages of the existing sucker rod in the connection form, the invention provides a sucker rod with ...
Claims
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IPC IPC(8): E21B17/02
Inventor 杜洋
Owner 葫芦岛龙源采油配套设备有限公司