Integrated short connector of instrument while drilling

Abstract

The invention relates to an integrated short connector of an instrument while drilling. The integrated short connector comprises a telescopic connector assembly, a fixed connector assembly and a drillcollar adapter substitute, wherein the drill collar adapter substitute comprises an upper drill collar adapter substitute and a lower drill collar adapter substitute; the telescopic connector assembly is mounted in the upper drill collar adapter substitute, and the fixed connector assembly is mounted in the lower drill collar adapter substitute; and the telescopic connector assembly is in butt joint with the fixed connector assembly. The connector is integrated with drill collar nipples of all instruments of a rotary geosteering system, and power supply communication in the instruments is achieved while threaded connection of the drill collars of all the instruments is achieved. In the manner of achieving internal communication in the instruments through direct connection of the drill collars, on one hand, the link of manual connection of a field operation is omitted, so that the construction safety risk is reduced, and the operation efficiency is improved; and besides, the threaded connection torque of the drill collars is utilized to ensure the reliability of internal connection power supply communication of the instruments, so that the use and assembly difficulty of the connector is reduced, the overall structure of the connector is simplified, and the length of the connector is shortened.

Description

technical field [0001] The invention belongs to the field of geological drilling, in particular to an integrated short connector for a drilling tool. Background technique [0002] The tool connector is a key part of the connection between each logging while drilling sub-section, which solves the problem of electromechanical connection between sub-sections of downhole logging-while-drilling instruments, and ensures that the functional sub-sections of the entire logging-while-drilling system The stable bridging of communication and power supply between underground mines serves as a connecting link between the preceding and the following. The conventional LWD connector is connected to the lower end of the MWD instrument, and is installed in the drill collar water hole together with the MWD. ​​The power supply and communication are realized by connecting the connector with the lower LWD instrument interface. Since the LWD tool is connected in series, the size is longer (general...

AI Technical Summary

Problems solved by technology

For example, in the early flexible connectors, flexible and telescopic connections were realized by designing retractable armored cable joints. However, during drilling operations, the armored cables leaked in the water holes and were washed by mud, resulting in poor insulation and easy breakage of the cables. and other issues, gradually tending to eliminate

In recent years, the rigid telescopic connectors commonly used in the market in recent years, in order to achieve stable expansion and downhole pressure balance, have designed too long telescopic structure and oil pressure balance or air pressure balance structure, resulting in a longer total length of the rigid telescopic connector (generally greater than 2 meters)

With the development of the rotary geosteering system in recent years, after being connected with a variety of LWD tools with different parameters, the size of the entire logging while drilling tool string is too long, resulting in a lag in logging parameters relative to the borehole and inconvenience in steering drilling. And there are problems such as high safety risk of on-site matching, inconvenient transportation, waste of drilling tool materials, etc.

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