Internal locking type drill pipe

Abstract

The invention provides an internal locking type drill pipe, and relates to the technical field of drilling equipment. The internal locking type drill pipe is mainly used for solving the problem of transmission of torque and tension of drill pipes. The internal locking type drill pipe includes a male joint and a female joint at both ends of a drill pipe body, the male connector is provided with a torque transmission external spline, the female connector is provided a torque transmission internal spline, a limiting shoulder is arranged on the male joint at the root of the torque transmission external spline, an installation pipe is concentrically arranged in the drill pipe body, a locking joint with an external thread is fixedly arranged at the end, close to the female joint, of the installation pipe, an internal thread is formed in the inner wall of the male joint, a pressing shoulder is arranged on the outer wall, close to the external thread, of a locking joint, a baffle ring is arranged between the pressing shoulder and the root of the torque transmission internal spline, and a pipe transfer mechanism is arranged at the end, close to the male joint, of the installation pipe. According to the internal locking type drill pipe, the torque and tension are transmitted by a connection way of the splines and threads correspondingly, division of work is clear, the stress advantages of different connection ways are fully exerted, the structure is simple and reliable, and disassembling and installation are convenient.

Description

technical field [0001] The invention relates to the technical field of drilling equipment, in particular to an inner locking drill rod. Background technique [0002] At present, there are many kinds of drill pipes used in engineering drilling rigs, which can be mainly divided into two categories: telescopic drill pipes and non-retractable drill pipes. Among them, the non-telescopic drill pipe generally needs to be connected section by section during use to increase the drilling depth. The connection methods of non-telescopic drill pipe mainly include: threaded connection, key plus horizontal pin connection and flange plate plus multiple bolts connection. Through the threaded drill pipe, the torque that can be transmitted is relatively small, and the torque can only be transmitted in one direction. It is time-consuming to use the flange connection to disassemble. In the prior art, for example, the publication number is CN203961814U, which is a quick connection structure fo...

AI Technical Summary

Problems solved by technology

The connection structure of this auger drill rod has many parts, the structure is relatively complicated, and the manufacture and use are not convenient enough.

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