Balance winch control system used for automatic braking type under-pressure work device

Abstract

The invention provides a balance winch control system used for an automatic braking type under-pressure work device. An oil tank of the control system communicates with a first hydraulic pump unit, asecond hydraulic pump unit and a third hydraulic pump unit. The first hydraulic pump unit communicates with a first check valve and a first automatic braking control unit of a first balance control unit. The second hydraulic pump unit communicates with a second check valve and a second automatic braking control unit in a second balance control unit. The third hydraulic pump unit communicates witha first pilot braking valve and a second pilot braking valve. A pipeline used for the oil tank communicates with a counterbalance valve and a pilot control valve. By means of the control system, the hovering and follow-up functions of an upper winch in under-pressure work are achieved, the balance winch control system can be well used in cooperation with the under-pressure work device for taking down oil pipes and down-hole tools, the automatic braking function and the exceeding-authority braking function of a balance winch are achieved, and automatic braking can be achieved through the system.

Description

Technical field: [0001] The invention relates to the field of special equipment for petroleum operations, in particular to a control system for a balance winch for automatic braking type with pressure operation equipment. Background technique: [0002] The balance winch is a commonly used equipment in snubbing operation equipment. A set of snubbing operation equipment usually has two sets of balance winches, which are used to lift well site operation tools such as lowering tubing. When lifting and lowering equipment under pressure, oil pipes and tools need to be in a hovering state above the center of the wellhead, and then rise or fall with the lifting system, and the winch can be braked in an emergency. Ordinary winches do not have the hovering function, and the lifting and lowering speed of the winch may not match the speed of the lifting system during operation, which may lead to safety accidents during operation, especially when heavy objects such as oil pipes are lower...

AI Technical Summary

Problems solved by technology

Ordinary winches do not have the hovering function, and the lifting and lowering speed of the winch may not match the speed of the lifting system during operation, which may lead to safety accidents during operation, especially when heavy objects such as oil pipes are lowered at a lower speed When the speed of the lifting system is lower than that of the lifting system, the falling of the heavy object is out of control, which is more likely to cause safety accidents during operation

In addition, the winch without automatic braking function has certain safety hazards in the process of working under pressure. When the operator misoperates the pilot control valve or the main relief valve and fails, the operating system cannot automatically brake the winch, resulting in a safety accident. happened

Images