Connecting nipple of logging-while-drilling instrument

Abstract

The invention relates to the technical field of measurement-while-drilling instruments for petroleum drilling, in particular to a connecting nipple of a logging-while-drilling instrument. The connecting nipple is mainly composed of a copper ring, an inner sealing ring of the copper ring, a connecting nipple body, a sealing joint, an outer sealing ring of the copper ring and a sealing joint sealingring, wherein the copper ring and the sealing joint are arranged at the two ends of the connecting nipple body correspondingly, and corresponding center adapting joints and side wall single-core pinsare installed on the two sides of the connecting nipple correspondingly. The side, where the center adapting joints are installed, of the connecting nipple body adopts a circumferential hole distribution design, seven small flow-through holes are symmetrically formed, the size of the small flow-through holes is consistent with the size of large flow-through holes in the side where the side wall single-core pins are installed, and transition holes with a larger flow-through area are formed between the large flow-through holes and the small flow-through holes. According to the connecting nipple, the matching use of logging-while-drilling instruments with different structures is realized, flow-through hole passages are optimized, the eddy current effect of flow-through slurry caused by the change of the flow-through area is effectively reduced, and the underground service life of the connecting nipple and the matching connected logging-while-drilling instrument can be effectively prolonged.

Description

technical field [0001] The invention relates to the technical field of measuring-while-drilling instruments for petroleum drilling, in particular to an adapter nipple of a logging-while-drilling instrument. Background technique [0002] At present, as unconventional oil and gas resources such as shale gas enter the stage of large-scale development, logging while drilling instruments at home and abroad have been widely used. Shops are everywhere. The functional sub-sections of logging-while-drilling instruments generally transmit electric energy and communication signals through wired connections. For the sake of their own instrument structure and functions, the instrument manufacturers adopt conductive rings on the end face of drill collars and drilling holes on the side walls. Pin and centered connector connections, etc. In order to improve the utilization rate of LWD tools and better serve the drilling site, LWD service providers generally maximize the tool utilization r...

AI Technical Summary

Problems solved by technology

A well-structured and reliable logging-while-drilling tool sub-joint is the simplest and most effective technical means to realize tool matching. The change problem, this kind of transformation is easy to form eddy current, most of the effective forms of the existing adapter pup joints are caused by the erosion caused by eddy current, and the erosion will greatly reduce the service life

And there is no transfer short section that can effectively solve this problem

Images