1results about How to "Solve structural instability" patented technology

The utility model relates to the technical field of well drilling tool, concretely relates to a big drift precision pressure control floating cementing tool, including coupling body and pressure difference mechanism, pressure difference mechanism includes pressure difference sleeve, fixed ring, four fixed assemblies and floating assembly, and pressure difference sleeve and coupling body sliding connection, and fixed ring and pressure difference sleeve fixed connection, and four fixed assemblies evenly set up outside fixed ring, and floating assembly sets up below pressure difference sleeve, and fixed assembly includes locating block, first spring and limit piece, and one end of locating block and coupling body sliding connection, and limit piece and locating block fixed connection lie in the side of locating block, and first spring sets up inside coupling body, and the outer wall of pressure difference sleeve is provided with the clamping hole, and the clamping hole and locating block are adapted, and through the setting of above -mentioned structure, the problem of unstable structure of the prior art is solved, and the butt joint of sleeve is completed through the fracture of shearing pin.