Drill-rod fixed clamp and control method thereof

Abstract

The invention relates to a drill-rod fixed clamp device for preventing blowout of oil and gas field well drilling, in particular to a drill-rod fixed clamp and a control method thereof. The drill-rod fixed clamp comprises a first fixed clamp assembly and a second fixed clamp assembly, and the first fixed clamp assembly is hinged to one end of the second fixed clamp assembly; one end of the first fixed clamp assembly is fixedly connected with a locking device, and the other end of the first fixed clamp assembly is hinged to the second fixed clamp assembly; one end of the second fixed clamp assembly is hinged to the first fixed clamp assembly, and the other end of the second fixed clamp assembly is a free end; and the locking device comprises a locking device body and a sliding part capable of sliding along the locking device body, and a groove used for placing the free end of the second fixed clamp assembly is formed between the sliding part and the locking device body. According to the drill-rod fixed clamp and the control method thereof, the first fixed clamp assembly and the locking device are fixedly connected, the locking device is arranged to be of a push-pull structure, and locking and unlocking of the second fixed clamp assembly are completed by pushing and pulling the sliding part, so that the fixed clamp assemblies and the locking device are integrated; and one-time hoisting is only needed to complete installation and removal, and installation and removal are both very convenient.

Description

technical field [0001] The invention relates to a device for dead sticking of a drill pipe for blowout prevention in oil and gas field drilling, in particular to a dead stick of a drill pipe and a control method thereof. Background technique [0002] In the field of development and exploration of oil and gas fields, when drilling operators obtain oil and gas reservoirs with various pressures, the bottom hole pressure exerts a great force on the drilling fluid and drilling tools to push outward. A kick, or blowout, occurs when the bottom hole pressure is greater than the counterweight force exerted by the driller. At this time, there is a special blowout preventer at the wellhead to prevent the liquid in the well from spraying outward from the surface of the drilling tool, and the drilling tool generally has an internal blowout preventer to prevent the liquid in the well from escaping upward from the water hole of the drilling tool. But at this time, the pressure in the well...

AI Technical Summary

Problems solved by technology

[0003]1. The control system is complex, the operating system has 4 operating handles, and the operation steps are cumbersome;

[0004]2. The reversing valve is used to close the hydraulic cylinder under pressure. Since the reversing valve cannot be effectively sealed, there is pressure leakage in the hydraulic cylinder, which eventually causes operation failure;

[0005]3. The system returns oil to the hydraulic power station. Due to the opening pressure of the oil return check valve of the hydraulic station, the unloading of the hydraulic pressure is not complete, causing the piston spring to fail to push back the piston so that the drill Pole dead card cannot be unlocked

Due to the heavy weight of the hydraulic locking device and dead card components, more manpower and spreaders are required for installation and disassembly, which brings inevitable troubles to installation and disassembly

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