Downhole sealing connection device for seismic monitoring equipment and assembly method thereof

Abstract

The invention provides an underground sealing connection device of earthquake monitoring equipment. The underground sealing connection device comprises a cable and an instrument connector, a fixing sealing block which is used for fixing an earthquake monitoring connecting copper needle is arranged in the instrument connector, and the sealing fixing block divides an inner cavity of the instrument connector into an upper cavity and a lower cavity which are independent of each other. The rear end of the instrument connector is connected with a connecting protective cover which is used for conducting sealing and connection fixing on the end of the cable. A cable positioning rack tube is arranged in the connecting protective cover, and a positioning hole for fixing the end of the cable is formed in the middle of the cable positioning rack tube. A fixed protective cover sealing ring is connected and fixedly arranged into the positioning hole of the cable positioning rack tube. An inner cavity of the connecting protective cover is filled with polyurethane flexible glue used for sealing and pressing the end of the cable. The instrument connector is provided with a cavity formed by the fixing sealing block, and the cavity is filled with epoxy resin hard glue used for sealing connector gaps in a packaging mode. The invention further provides an assembling method of the underground sealing connection device of the earthquake monitoring equipment.

Description

[0001] 【Technical field】 [0002] The invention relates to a deep well seismic monitoring technology, in particular to an underground sealing connection device for seismic monitoring equipment in which an instrument and a cable are waterproof and sealed in connection in seismic deep well observation. [0003] 【Background technique】 [0004] With the acceleration of urbanization, the environment for surface seismic observation is getting worse and worse, especially in big cities, where the establishment of subways, railways and other rail transportation has seriously affected the background noise of seismic monitoring instruments. Therefore, more and more equipment is installed underground and directly rigidly connected to the bedrock. [0005] In this way, we encountered a problem. Since the bedrock is generally tens to hundreds of meters underground, the equipment and the connected telemetry cables must withstand a water pressure of several MPa, which is likely to cause water ...

AI Technical Summary

Problems solved by technology

This kind of connection has the following problems. First, the connection is easy to loosen, fall off, and crack, especially under high-pressure conditions underwater. Since the geophone is mostly used in an environment with water in the well, it is easy to cause water leakage and electric leakage. , which seriously affects the test results, or even cannot be used at all; second, the tensile strength of the cable connection is low; third, when the equipment is used again, it must be reconnected, encapsulated, glued, and dried, which seriously affects work efficiency

Images