Patrick L Walker

US Patent:

61163422, Sep 12, 2000

Filed:

Oct 20, 1998

Appl. No.:

9/175603

Inventors:

Michael Dale Clark - Marlow OK
Patrick L. Walker - Houston TX
Kirk Lynn Schreiner - Duncan OK
Philip D. Nguyen - Duncan OK

Assignee:

Halliburton Energy Services, Inc. - Duncan OK

International Classification:

E21B 43267

US Classification:

166280

Abstract:

Improved methods of propping a fracture in a subterranean zone whereby the subsequent flow-back of the proppant is prevented are provided. The methods basically comprise the steps of placing proppant and a magnetized material in said fracture while maintaining the fracture open and then allowing the fracture to close on the proppant and magnetized material whereby the magnetized material clusters in voids and channels in the proppant bed formed.

US Patent:

57960356, Aug 18, 1998

Filed:

Mar 12, 1996

Appl. No.:

8/615537

Inventors:

Patrick A. Walker - Houston TX

International Classification:

H02G 304

US Classification:

174 48

Abstract:

A low point drain for draining accumulated water from electrical conduit systems that are located in non-hazardous environments is disclosed. The drain includes a threaded coupling suitable for connection to a tapped opening in an electrical conduit, or a conventional "T" or elbow fitting or an electrical enclosure or junction box. The drain also includes an end cap attached to the other end of the coupling, a safety washer and a screen assembly that is retained within the end cap. The end cap has an interior lip that defines an opening through which the water may drain. The screen assembly includes a grommet that is held securely against the coupling end and a frustoconical screen that protrudes through the end cap opening. When the drain is installed at a low point in the conduit system, condensate that forms in the system flows out the drain aperture and screen by the action of gravity. The screen assembly also serves to exclude vermin and debris and provides a visual indication when rust or debris has accumulated to an extent requiring that the drain be cleaned.

US Patent:

60752068, Jun 13, 2000

Filed:

Mar 9, 1998

Appl. No.:

9/036844

Inventors:

Patrick A. Walker - Houston TX

International Classification:

H02G 304

US Classification:

174 48

Abstract:

A low point drain for draining accumulated water from electrical conduit systems that are located in non-hazardous environments is disclosed. The drain includes a threaded coupling suitable for connection to a tapped opening in an electrical conduit, or a conventional "T" or elbow fitting or an electrical enclosure or junction box. The drain also includes an end cap attached to the other end of the coupling, a safety washer and a screen assembly that is retained within the end cap. The end cap has an interior lip that defines an opening through which the water may drain. The screen assembly includes a grommet that is held securely against the coupling end and a frustoconical screen that protrudes through the end cap opening. When the drain is installed at a low point in the conduit system, condensate that forms in the system flows out the drain aperture and screen by the action of gravity. The screen assembly also serves to exclude vermin and debris and provides a visual indication when rust or debris has accumulated to an extent requiring that the drain be cleaned.