Hunting Pressure Control Equipment manufactures

 Wireline BOP

Manual: Smaller, lighter and easier to handle. Operated by manually turning the two handles to open and close the rams. Manual BOPs are used mainly for low pressure non-gas service
Hydraulic: Mostly used, heavier and bulkier but operated remotely and quite rapidly. It is operated by a hydraulic pump, but with manual backup. A hydraulic BOP can be closed manually but must be opened hydraulically after the stems have been back out manually. Used because of quick response closure time and ease of operation

Annular Type: Available in higher pressure models (10,000 psi and 15,000 psi). Hydraulically operated and functions much like an annular preventer used to seal around a workstring. With the application of hydraulic pressure a piston travels in the upward direction causing the sealing elements to seal around the wireline.

One set of rams generally used for low pressures (up to 5000 psi) – manual and hydraulically operated
Dual or Twin BOP
Can be two rams in a single body or two independent rams; available in pressure rating of 5000 psi to 15000 psi; configured as 2 wire rams or 1 wire ram and 1 cutter ram

Used mainly for high pressure operations (10,000 psi and 15,000 psi); two models are available: normally open, normally closed; both are hydraulically operated
The Otis Wireline Valve has been a reliable BOP for decades and is still in use on many land locations. It is available in 5000 psi and 10000 psi models and can be completely rebuilt in the field if the need arises.

Eastern Oil Tools manufactures this single ram useable for both slickline and multi-strand line service. It incorporates a double sealing surface which allows sealing to occur from both above and below the ram block. This is especially helpful in grease seal applications where it may be desirable to inject grease between ram blocks to effect a seal.

Hunting Pressure Control Equipment manufactures this hydraulically operated double wireline valve. It is equally suited for slickline and e-line applications and is available in pressure ratings up to 15000 psi.
The slick line version can be equipped with two wire rams or a wire ram and cutter ram while the braided line model contains inverted braided line rams.

All wireline valves incorporate an equalizing valve which is located on the front of the body of the preventer. The equalizer valve allows pressure to be equalized across a closed set of rams. A ¼ ” Allen wrench is used to open the valve. Before operating make sure there is a retaining screw installed.

This wireline valve manufactured by Bowen Oil Tools is designed to operate on the same principle as an annular preventer used in drilling or workover. Hydraulic pressure is applied to a piston which travels in an upward direction and acts on the three sealing segments in the same fashion that the piston acts on the element of an annular preventer. The rubber elements on the sealing segments will seal around slickline as well as multi-strand wireline.

Like other wireline valves, this one incorporates an equalizing valve allowing pressurization of the lubricator while the valve is closed.
The operation of the Bowen High
Pressure Wireline Valve is much like an annular preventer. Hydraulic fluid is pumped in the closing inlet which lift a piston.

Another version of the high pressure wireline valve is the fail-safe model. Its basic operation is similar to the model on the previous page with the exception of the fail-safe spring. Hydraulic pressure is applied to the piston which moves against the spring to open the valve and hydraulic pressure must be maintained in order to keep the valve in the open position. If hydraulic pressure is lost the spring takes over and closes the valve. An optional bleeder valve is available in the event of lubricator needle valve failure (pictured below).


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