An integrated short connector for drilling tools

Abstract

An integrated short connector for drilling tools, including a telescopic connector assembly, a fixed connector assembly, and a drill collar adapter; the drill collar adapter includes an upper drill collar adapter and a lower drill collar adapter, and the telescopic connector assembly It is installed in the upper drill collar conversion joint, and the fixed connector assembly is installed in the lower drill collar conversion joint; the telescopic connector assembly and the fixed connector assembly are butted; The integration of the instrument realizes the internal power supply and communication of the instrument through the threaded connection of the drill collars of each instrument. This method of realizing the internal communication of the instrument through the direct connection of the drill collar saves on the one hand the artificial connection link of the on-site operation and reduces the construction cost. The safety risk is improved, and the operation efficiency is improved. At the same time, the reliability of the internal connection power supply and communication of the instrument is ensured by using the drill collar thread connection torque, which reduces the difficulty of using and assembling the connector, simplifies the overall structure of the connector, and shortens the length.

Description

technical field [0001] The invention belongs to the field of geological drilling, and in particular relates to an integrated short connector of an instrument while drilling. Background technique [0002] The tool-while-drilling connector is the key component of the connection between each LWD sub-section. It solves the problem of electromechanical connection between the down-hole LWD sub-sections and ensures that each functional sub-section of the entire LWD system is guaranteed. It is a stable bridge between underground communication and power supply, which plays a role in connecting the previous and the next. The conventional while-drilling connector is connected to the lower end of the MWD tool, and is installed in the drill collar water hole together with the MWD. ​​The connector is connected to the lower LWD tool interface to realize power supply and communication. Due to the long dimension (generally more than 10 meters) after the LWD tool is connected in series, in o...

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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