Separating valve capable of being opened and closed repeatedly

Abstract

The invention relates to a separating valve capable of being opened and closed repeatedly, and belongs to the field of petroleum and natural gas well completion operation tools. An upper connector isinstalled at one end of a sliding connector in a sliding mode, and a connecting cylinder is installed at the other end of the sliding connector in a threaded mode; a sliding groove sleeve is installedon the sliding connector at the end of the upper connector through a guide ring; a valve element is installed at the end of the sliding connector in the connecting cylinder through a valve sleeve; and a lower connector is installed on the valve sleeve at the end of the connecting cylinder. According to the separating valve, the valve element can generate displacement relative to the axial direction of the sliding connector through a forward rotating or reverse rotating pipe column, and therefore pressure transmission holes between the valve sleeve and the valve element are matched or staggered, and opening and closing of a valve body are achieved; a plurality of sealing rings are arranged between the valve sleeve and the valve element, in the process of opening and closing the separatingvalve, the sealing rings are not disengaged from a sealing face, and therefore damage to the sealing rings is reduced; and therefore the operation efficiency is improved, and the operation risk is reduced.

Description

technical field [0001] The invention relates to a separation valve which can be opened and closed repeatedly, and belongs to the field of oil and natural gas well completion operation tools. Background technique [0002] At present, in the process of oil (gas) well operation, it is often necessary to temporarily close the oil and gas well due to various unexpected reasons, and the separation valve must be involved when closing the oil and gas well; the existing separation valve has the following two problems when temporarily closing the oil and gas well: question: [0003] One: the seal is easily damaged when it is separated from the seal cylinder and re-enters the seal cylinder later, and the seal is exposed in the well for a long time and is prone to aging, resulting in poor sealing when it is reopened in the later stage and affecting production; [0004] Second: Conventional separation valves used for temporary well closure rely on rotating threads to separate the pipe s...

AI Technical Summary

Problems solved by technology

[0003] One: the seal is easily damaged when it is separated from the seal cylinder and re-enters the seal cylinder later, and the seal is exposed in the well for a long time and is prone to aging, resulting in poor sealing when it is reopened in the later stage and affecting production;

[0004] Second: Conventional separation valves used for temporary well closure rely on rotating threads to separate the pipe string and move the valve body to control opening and closing. However, this type of separation valve is easy to damage the thread and is not easy to connect due to the need for butt joint threads in the well, which affects the valve. Opening and closing may even affect the recovery of the whole string, thereby increasing the cost of the operation and the risk of the operation; therefore, it is necessary to develop a separation valve that can be opened and closed repeatedly

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