Electric and fluid mixed connector of sample injecting and draining module of downhole MWD (Measurement-While-Drilling) instrument

Abstract

The invention discloses an electric and fluid mixed connector of a sample injecting and draining module of a downhole MWD (Measurement-While-Drilling) instrument, and aims at solving the problems of a mixed connector of an existing sample injecting and draining module that fluid possibly leaks from a module end surface which is exposed to the outside during the re-mounting process after use, and accordingly the electricity conducting capacity of an electric connecting part is reduced. The electric and fluid mixed connector is characterized in that n upper fluid pipelines and n lower fluid pipelines are correspondingly formed on the upper end surface and the lower end surface of a connector body; fluid inserting parts are inserted at the top ends of the upper fluid pipelines and the bottom ends of the lower fluid pipelines; a multi-core voltage bearing electric socket is arranged on an electronic circuit pipeline of the connector body and is fixed to the connector body; a screw sleeve sleeves an outer circle of the connector body, and outer threads are processed in the screw sleeve; each upper fluid pipeline communicates with the corresponding lower fluid pipeline through a corresponding radial turning pipeline on the connector body; a plug is in thread connection with the outer end of each turning pipeline. According to the electric and fluid mixed connector, self-sealing fluid connecting pipe assemblies are adopted to limit the liquid from leaking from the pipeline during dismounting the sample injecting and draining modules from two ends.

Description

technical field [0001] The invention relates to the connection technology of downhole drilling tools, and more particularly relates to an electrical and fluid mixed connector of a downhole drilling tool sampling module. technical background [0002] In formation testing, downhole hydraulic LWD instruments need to use the pumping and sampling module to filter formation fluid into the instrument, so that the detection module can analyze and measure the oil and gas content in the formation fluid downhole. After the measurement, the instrument discharges the fluid sample again. The pumping and sampling module is composed of multiple hydraulic integrated modules. The connection of the hydraulic integrated modules requires a mixed electrical and fluid joint to realize the connection between fluid and electrical. There is such a problem in the process of docking: when the joint is reinstalled after use, fluid may leak from the exposed module end face, contaminate the electrical pl...

AI Technical Summary

Problems solved by technology

There is such a problem in the process of docking: when the connector is reinstalled after use, fluid may leak from the exposed module end face, pollute the electrical plug and socket, thereby weakening the electrical conductivity of the electrical connection parts and even causing a short circuit

Images