Dynamic sealing and pressure compensation structure for shear valve slurry pulser

Abstract

The invention discloses a dynamic sealing and pressure compensation structure for a shear valve slurry pulser. The dynamic sealing and pressure compensation structure comprises a rubber cylinder structure, wherein the rubber cylinder structure is arranged in an annular cavity formed by a cavity structure of a stator and an output shaft, one end of the rubber cylinder sleeves on the outer side of the output shaft, and the other end of the rubber cylinder structure sleeves on the outer side of a pulser shell; the stator sleeves on the outer side of the output shaft of a motor, and a rotor is connected to the tail end of the output shaft of the motor; and a cavity structure is arranged in the stator, the rubber cylinder structure is arranged in the annular cavity formed between the cavity part, close to the rotor, of the cavity structure and the output shaft, and the pulser shell is mounted in the annular cavity between the cavity part, far from the rotor, of the cavity structure and the output shaft. The invention relates to but is not limited to oil exploration equipment. By virtue of the dynamic sealing and pressure compensation structure, the configuration of the optimal dynamic sealing mechanism can be realized, and the service life of a dynamic sealing part can be effectively prolonged; and meanwhile, the configuration of an optimal pressure compensation mechanism can be realized, and the routing process of short sections in an instrument can be effectively optimized.

Description

technical field [0001] This application relates to but not limited to oil exploration equipment, especially a dynamic seal and pressure compensation structure of a shear valve mud pulser. Background technique [0002] The Measurement While Drilling (MWD) system can measure parameters such as well deviation, well deviation azimuth, downhole torque, drill bit load-bearing, natural gamma ray, and resistivity. With the development of petroleum engineering, in the 1980s, on the basis of the original measurement-while-drilling system MWD, a number of parameter sensors for formation evaluation were added, such as compensated dual lateral resistivity, natural gamma ray, azimuth neutron density, Acoustic waves, compensated neutron density, etc.; a system composed of these instruments is often called a logging while drilling system (Logging While Drilling: LWD). MWD and LWD are the key technologies to complete large-angle and horizontal well drilling, real-time well site data acquisi...

AI Technical Summary

Problems solved by technology

The movement of the piston balances the external pressure; it has the disadvantages of complex pressure compensation structure, many instrument parts, and inconvenient maintenance; at the same time, the oil inside the oil chamber leaks outward, and the working time of such a pressure compensation mechanism is short

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