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Blowout Preventers

Guiberson's compact blowout preventers are specifically designed for well servicing, workover, and light drilling. They seal tight against well pressure up to 3,000 psi and close and open easily and positively with either manual or hydraulic control. The ram assemblies in Guiberson preventers assure a positive, complete seal. The rams are designed to position the pipe at the center of the unit. The non-rising ram feed screws in Guiberson preventers are hollow for full pressure equalization. This important feature assures that preventers operate easily and positively, even under peak pressure. The heavy Acme threads on these screws feed smoothly and will not foul with residues or junk.

CAUTION: Do not open BOP under pressure!

Type `H-1' Hydraulic BOP Packing Rubber

Quick Change Packing Rubber

Guiberson preventer rams can be changed quickly and easily, even while the pipe is in the hole. Only six nuts are unscrewed to remove either end plate. With end plates removed, both ram assemblies are accessible. The new packing rubber then slips easily into the ram assembly. No tools are required to install the new rubber. The packing rubber is strengthened by a molded-in plate. Guiberson preventers are fabricated for high burst resistance of tough, heat-treated cast steel and are compact and easy to handle. Because the flange bosses are cast integrally with the preventer body, the extra space and weight of separate flange necks is eliminated. With this compact design, each Guiberson preventer stands only 11-1/2" high. Four cast-in lifting hooks on the body make lifting and moving easy.

Hydraulic Preventer

Guiberson's hydraulically operated blowout preventer combines all the features of the mechanical with virtually instantaneous hydraulic operation. With 2,000 psi hydraulic pressure, it closes in less than 2 seconds. Available with dual controls for both rig floor or remote operation, it can be operated from the rigs hydraulic system or, using a separate pump-accumulator system, from separate pneumatic, electric, gas, or diesel powered equipment. Hydraulic preventers are supplied with supplementary manual controls which allow the rams to be locked positively, once closed, and provide an alternate closing mechanism for added safety.

Hydraulic Conversion Units

By simply removing nuts at each end to exchange the end plates, any Guiberson preventer may be converted to hydraulic operation. Ram assemblies are not changed when converting from manual to hydraulic operation.

Table 78: HYDRAULIC UNIT - SPECIFICATIONS

SPECIFICATION

MAXIMUM OPERATION PRESSURE, PSI RATIO VOLUME OF FLUID, U.S. GALLONS FLUID VOLUME PER INCH OF STROKE, CUBIC IN. PISTON STROKE, INCHES MAXIMUM OPERATING PRESSURE, kPa RATIO VOLUME OF FLUID, LITERS FLUID VOLUME PER INCH OF STROKE, mm² PISTON STROKE, mm

Flexible, Economical Duals

Only Guiberson preventers provide the added safety of a double unit without the extra cost of integral double units or the waste of space caused by inter-connecting spools. The patented tie bolt system in these preventers allows them to be stacked directly, either parallel or at right angles to each other. This design gives the operator maximum flexibility in positioning the units for most convenient operation and most efficient use of space. Only four tie bolts are needed to stack the preventers. These tie bolts fit flush with the top and bottom of the housing, eliminating interference with wing valves and other equipment. Stacked Guiberson preventers provide the ultimate in compactness. Two units stacked and ready for service are less than 24 inches high.

46

TO OPEN

2,000 1-1 .94 16.5 7.0 13800 1-1 3.56 10645 177.8

TO CLOSE

2,000 6.5-1 1.1 19.6 7.0 13800 6.5-1 4.16 12645 177.8

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