Wellhead pressure testing and seal examining device

Abstract

Provided is a wellhead pressure testing and seal examining device. The wellhead pressure testing and seal examining device comprises a leather cup shaft, a leather cup, a leather cup pressing cap, a connecting connector, a piston, a sealing shaft, a spring, a pressure regulating base, a rubber sleeve, a sealing sleeve, an inner pipe, a cone, a slip, a lower connector, a slip holder, a seal blocking, a return spring and a spring seat, low pressure seal examining and high pressure seal examining can be conducted on an installed blowout preventer on the scene, reliable working of the blowout preventer is guaranteed, piercing-caused leakages of the blowout preventer and the connecting position between the blowout preventer and a wellhead are avoided, non-leakage of the wellhead during blowout of an oil-water well is ensured, the oil-water well is under a controlling status, personal injury and death and property loss are avoided, and remarkable economic benefit is achieved. According to the wellhead pressure testing and seal examining device, anchoring in a casing pipe can be conducted during the high pressure seal examining, so that axial force generated by the high pressure during the seal examining is supported on the casing pipe, and all parts are not damaged due to the excessive axial force.

Description

technical field [0001] The present invention is a device used for wellheads in oilfield operations, and is a wellhead pressure testing and sealing device. Background technique [0002] During the workover operation of oil and water wells, the wellhead is open. When the pressure in the well changes and increases, blowout is prone to occur. In order to avoid the out-of-control state during the blowout of oil and water wells, blowout preventers are installed at the wellhead during workover operations. However, when a blowout occurs, close the blowout preventer and rush to install the wellhead, so that the oil and water wells are under control and avoid personal casualties and property losses. However, the blowout preventer installed at the wellhead cannot be tested for pressure at present, and there is no suitable pressure test device, so it cannot be guaranteed whether the blowout preventer is sealed reliably, nor can it be guaranteed whether the blowout preventer, wellhead de...

AI Technical Summary

Problems solved by technology

However, the blowout preventer installed at the wellhead cannot be tested for pressure at present, and there is no suitable pressure test device, so it cannot be guaranteed whether the blowout preventer is sealed reliably, nor can it be guaranteed whether the blowout preventer, wellhead device and their joints are sealed reliably, resulting in some high pressure The blowout preventer of the well can be closed, but if the blowout preventer and the wellhead device are punctured and leaked, the blowout will still occur if the blowout preventer and the wellhead device are damaged, and the oil and water well will be out of control, resulting in personal casualties and property losses

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