Continuous circulation type well drilling power system protection device and protection method thereof

Abstract

The invention relates to the technical field of drilling, in particular to a continuous circulation type drilling power system protection device and a protection method thereof. The designed auxiliary positioning mechanism can accurately measure the displacement amount of the drill rod when the drill rod moves, the drill rod is convenient to position, install and replace, when the drill rod reaches a preset position, the gear can be driven to rotate to drive the auxiliary fixing sleeve to fix the drill rod, and the drill rod is convenient to install. The designed hydraulic system is provided with an adjusting valve, the sealing performance of the two sets of sealing clamping plates can be switched through the adjusting valve, and overhauling and later-period coping with various complex working conditions are facilitated. The designed hydraulic system is matched with the sealing mechanism, compared with a traditional sealing mechanism, active sealing of two sets of elastic sealing rings is achieved, the oil outlet pipe and the oil inlet pipe are adopted for conveying hydraulic oil, and the sealing performance and safety of the device are greatly improved.

Description

technical field [0001] The invention relates to the technical field of drilling, in particular to a continuous circulation drilling power system protection device and a protection method thereof. Background technique [0002] Continuous drilling equipment is widely used in the field of drilling because it can maintain the circulation of drilling fluid during the process of changing drill pipes and effectively prevent failures. However, due to the high pressure of drilling fluid, drilling Fluid ejection will cause damage to the drilling power equipment. At present, semi-sealed devices that can be used as continuous circulation devices include conventional semi-sealed ram blowout preventers, conventional passive sealed rotary control heads and other types of active rotary control heads; conventional semi-sealed ram rubber cores are directly affected by the drill pipe Friction, the rubber core is easily damaged and the life is short; the conventional passive sealed rotary cont...

AI Technical Summary

Problems solved by technology

[0002] Continuous drilling equipment is widely used in the field of drilling because it can maintain the circulation of drilling fluid during the process of changing drill pipes and effectively prevent failures. However, due to the high pressure of drilling fluid, drilling Fluid ejection will cause damage to drilling power equipment

At present, semi-sealed devices that can be used as continuous circulation devices include conventional semi-sealed ram blowout preventers, conventional passive sealed rotary control heads and other types of active rotary control heads; conventional semi-sealed ram rubber cores are directly affected by the drill pipe Friction, the rubber core is easily damaged and the life is short; the conventional passive sealed rotary control head is high in height and needs a guide cone to guide the penetration of the rubber core, but the drill pipe cannot use the guide cone when making up the continuous circulation device

In the currently published patents, although there are many solutions such as using rubber cores as blowout preventers, these rubber cores cannot actively hold the drill pipe tightly, resulting in poor sealing performance, and some rubber core blowout preventers with active holding functions Complicated oil circuit is required for sealing, the cost is huge and the sealing is difficult to guarantee, which not only makes the continuous drilling equipment more complicated and bloated, but also reduces the reliability of the continuous drilling equipment

Images