Wireline coring drill string apparatus and method with in situ tensile strength testing

Abstract

The application discloses a rope coring drill device capable of in-situ tensile strength test and a method thereof, relates to the drilling technology field of soil layers or rocks, and solves the problem that the existing rope coring drill device cannot test the tensile strength of rock mass. The technical scheme adopted by the application is as follows: the rope coring drill device capable of in-situ tensile strength test comprises a drill outer pipe, a fishing device and a coring device which are located in the drill outer pipe, the fishing device comprises in-situ testers, a first signal transmitter and a fishing spear which are connected in sequence, the rear end of the coring device is provided with a fishing spear head which is matched with the fishing spear, the front end of the coring device is provided with a coring pipe, the in-situ testers are internally provided with a tensile stress meter and a data acquisition module, the first signal transmitter is used for acquiring the signal that the fishing spear and the fishing spear head are connected and cutting off the drilling fluid passage around the fishing spear and the fishing spear head. The application is used for drilling and coring, and the in-situ test of the tensile strength of the rock core can be carried out during the coring.

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