Downhole motor spiral steel ball reducer
A technology of power drilling tools and spiral steel, which is applied in the direction of transmission box, transmission device, transmission device parts, etc., can solve the problems of large radial size of planetary gear meshing reducer, poor working reliability, and easy broken teeth of the reducer, etc. Achieve the effects of high safety and stability, uniform force, and reduce drilling costs
Pending Publication Date: 2017-06-13
YANGTZE UNIVERSITY
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Problems solved by technology
Most of the existing power drilling gear reducers for downhole are planetary gear meshing reducers. This kind of reducer is easy to break teeth in the environment of severe vibration in the downhole. Therefore, the working reliability of this kind of reducer is poor and the service life is short.
Due to the large radial size of the planetary gear mesh reducer, a larger borehole diameter is required in actual use, which makes the drilling cost very high
Method used
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Embodiment Construction
[0020] The helical steel ball reducer for downhole power drilling tools includes an upper joint 1 , an input shaft 2 , an output shaft 3 , an upper casing 4 and a lower casing 5 . The lower end of the upper case 4 is threadedly mounted with the lower case 5; the upper end of the upper case 4 is threaded with the upper joint 1, and the upper joint 1, the upper case 4 and the lower case 5 are equipped with the input shaft 2; one end of the input shaft 2 extends Up to the outer end of connector 1. A casing retaining ring 6 is arranged between the upper casing 4 and the lower casing 5; an input bearing string 7 is arranged between the upper casing 4 and the input shaft 2 above the casing retaining ring 6 to withstand pressure generated by the drilling fluid. Axial thrust and some radial force. The upper joint 1 is provided with an upper oil-filled plugging hole 11, and a balance piston 12 is provided between the upper joint 1 and the input shaft 2 to balance the pressure of the l...
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The invention relates to a downhole motor spiral steel ball reducer and belongs to the technical field of petroleum, natural gas downhole drilling tools. The reducer comprises an upper joint, input shafts, output shafts, an upper case, and a lower case; the input shafts are installed in the upper joint, the upper case and the lower case; the output shafts are mounted in the lower case, a bottom plug and a sealing gland cover, and one end of the output shafts extends to the outer end of the sealing gland cover; the end sockets of the input shaft and the output shaft in the lower case are movably connected with each other in a sleeved mode through an input shaft alignment bearing. The reducer is connected with a drill pipe through the input shafts to transmit the power of the drill pipe to a guide frame, and therefore after the guide frame slows up, the power is transmitted to the output shafts, and therefore the purpose of speed reduction is achieved; the reducer has the advantages that a steel ball is stressed evenly, the security and stability are high, and the service life is long; the drilling cost is reduced effectively.
Description
technical field [0001] The invention relates to a spiral steel ball reducer for downhole power drilling tools, which belongs to the technical field of downhole drilling tools for petroleum and natural gas. Background technique [0002] The output speed of turbo drilling tools and small-number screw drilling tools is very high, generally 400-600rpm, but the actual drilling speed is very low, generally below 200rpm. Most of the existing power drill reducers for downhole are planetary gear meshing reducers, which are easy to break teeth in the environment of severe vibration in the downhole, so the working reliability of this reducer is poor and the service life is short. Due to the large radial size of the planetary gear meshing reducer, a larger borehole diameter is required in actual use, which makes the drilling cost very high. Contents of the invention [0003] The object of the present invention is to provide a helical steel ball reducer for downhole dynamic drilling t...
Claims
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IPC IPC(8): F16H13/08F16H57/029F16H57/02
CPCF16H13/08F16H57/02F16H57/029
Inventor 李美求罗竞波袁新梅李嘉文
Owner YANGTZE UNIVERSITY