Sealing device applied to electric drill cable plug

Abstract

The invention discloses a sealing device which is provided with a cable plug and applied to an electric drilling rig. The sealing device comprises a first joint short section, a first plug arranged in the first joint short section, a second joint short section and a second plug arranged in the second joint short section. A convex part is arranged on one end of the first plug. A first conductive member is arranged on the convex part. A concave part which matches the convex part is arranged on one end of the second plug. A second conductive member is arranged in the concave part. A sealing member and a spacing ring which is arranged on one side, which is away from the concave part, of the sealing member are arranged on the side wall of the concave part. The concave part is filled with an insulating substance. When the first plug and the second plug are in butt joint, a gap is between a part of the side wall of the convex part and the side wall of the concave part. The first plug and / or the second plug is / are provided with a first channel and a second channel. The sealing device which is provided with the cable plug and applied to the electric drilling rig can effectively reduce the possibility of water immersion of the plugs.

Description

technical field [0001] The invention relates to the technical field of oil and gas drilling, in particular to a sealing device applied to a cable plug of an electric drilling tool. Background technique [0002] The downhole electric drilling tool is a drilling equipment that uses a submersible motor to drive the drill bit to rotate at the bottom of the well. It can generally be used in vertical wells, directional wells and horizontal wells. Electric drilling tools are driven by electricity. Compared with ordinary drilling, the main advantages of electric drilling tools are: the speed, torque and other parameters of drilling tools have nothing to do with the injection volume, viscosity and physical and chemical properties of drilling fluid, but are only related to the performance of the motor. Compared with conventional screw drills and turbo drills, reverse circulation can be performed. Because the electric drive can also be used as the power supply of the downhole measurin...

AI Technical Summary

Problems solved by technology

During the drilling operation, the plug is always energized, and at the same time, the drill pipe is still full of drilling fluid. At this time, if the drilling fluid slowly penetrates into the plug, it will inevitably cause a short circuit, which will not only cause damage to the electric drilling tool, but also may cause casualties

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