Halliburton Company

Verlin R Beach

Clinton W Cole

The cover retainer of the present invention is secured to the fluid end of a plunger-type high pressure pump behind a substantially circular protective cover including a shear disc surrounded by an annular outer portion, which cover is held in place by the retainer. When subjected to a compressive load by the plunger in excess of a predetermined limit, the shear disc shears from the outer portion along an arcuate boundary of reduced wall thickness between the center and outer portions and the sheared center portion is propelled by the pressure into the retainer, the interior of which is of substantially frustoconical configuration, with the base of the cone oriented substantially coaxially with respect to the shear disc. As the shear disc enters the interior of the retainer, its energy is substantially dissipated through contact between the periphery of the disc and the retainer inner wall without harm to the retainer.

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Duncan, OK, United States of America

Verlin R Beach