Mechanical device applicable to underground near-bit wireless short-distance transmission and sending

Abstract

The invention mainly belongs to the technical field of a near-bit wireless short-transmission device, and specifically relates to a mechanical device applicable to underground near-bit wireless short-distance transmission and sending. The mechanical device comprises a drill bit connecting shell body, a screw connecting shell body and insulation nipples, wherein the drill bit connecting shell body and the screw connecting shell body are made of metal material, and the insulation nipples are made of insulation material; the insulation nipples are in series connection between the drill bit connecting shell body and the screw connecting shell body, electric isolation of the drill bit connecting shell body and the screw connecting shell body is achieved, and the drill bit connecting shell body and the screw connecting shell body form an electromagnetic emission positive pole and an electromagnetic emission negative pole correspondingly; the mechanical device further comprises measuring units and a data sending unit, wherein the measuring units are used for collecting near-bit measured parameters, and the data sending unit is used for achieving wireless short transmission; and the data sending unit is used for receiving and sending the near-bit measured parameters. The mechanical device does not affect structure strength and sealing performance of a drilling tool, and meanwhile, the wireless short-transmission and sending of the underground near-bit measured parameters are achieved.

Description

technical field [0001] The invention mainly belongs to the technical field of near-drill wireless short transmission devices, and in particular relates to a mechanical device suitable for downhole near-drill wireless short transmission transmission. Background technique [0002] In recent years, the use of horizontal wells to improve the drilling rate and recovery rate of oil and gas reservoirs has been widely used in various oil fields. The near-bit geosteering drilling system has the characteristics of real-time judgment of formation attributes, forward exploration of formations to be drilled, and accurate steering. It has It helps to improve the discovery rate of exploration wells, the drilling rate of development wells and the recovery rate of oil and gas fields. [0003] Near-bit inclination measuring instrument, usually the near-bit inclination sensor is packaged at the front end of the deflection tool (downhole mud motor), and transmitted to the deflection tool (downh...

AI Technical Summary

Problems solved by technology

However, the design of the transducer makes the mechanical structure of the launching nipple near the drill bit more complex, and the long-distance wireless transmission requires a greater transmission energy of the transducer, and it is very difficult to receive the signal due to the existence of the drill collar wave. Wireless short transmission of the signal through the screw

Images