Other

The Dow Chemical Company

Paul A Weiss

Wayne F Nelson

An apparatus including valving structure to direct in a circular swimming pool a first conduit to effect a circular stream within the swimming pool, with a second conduit directed to a basket, and the second conduit having a nozzle directing fluid flow into the basket in association with the first conduit to direct debris from the swimming pool into the basket structure.

Swimming pool skimmer apparatus

The cementing collar described herein is designed primarily for cementing operations in oil or gas wells. The basic assembly includes a collar, an outer sleeve slidable in the collar, and an inner sleeve slidable in the outer sleeve. The collar and outer sleeve each have cementing ports therein. When the assembly is being run into the well casing, the collar and both sleeves are secured by shear pins in a position such that the cementing ports are closed. To open the cementing ports a trip bomb is dropped into the casing to engage a seat inside the outer sleeve. This causes the pins to shear and permits the outer sleeve to move down to a position in which the sleeve ports line up with the collar port. After cementing has been completed, a plug is flowed down the casing to engage the inner sleeve. Fluid pressure is applied behind the plug to shear the pins a second time. This moves the outer sleeve further down to a position in which the cementing ports are again closed.

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Wichita Falls, TX, United States of America

Paul A Weiss