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Inventor

MANDERSCHEID PHILLIP H

US8 patents
⚠️ This page may combine multiple inventors who share the name “MANDERSCHEID PHILLIP H”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

HUGHES TOOL CO

4 patents
US4375240AMar 1, 1983

Well packer

HUGHES TOOL CO93 citations95
US4399870AAug 23, 1983

Annulus operated test valve

HUGHES TOOL CO38 citations92
US4523641AJun 18, 1985

Liner hanger with channel guides

HUGHES TOOL CO30 citations91
US4548264AOct 22, 1985

High temperature well packer

HUGHES TOOL CO25 citations81

BROWN OIL TOOLS

2 patents
US4059150ANov 22, 1977

Anchoring assembly

BROWN OIL TOOLS56 citations94
US4018272AApr 19, 1977

Well packer apparatus

BROWN OIL TOOLS42 citations91

MASX ENERGY SERVICES GROUP INC

1 patent
US5046557ASep 10, 1991

Well packing tool

MASX ENERGY SERVICES GROUP INC68 citations94

BJ HUGHES INC

1 patent
US4320803AMar 23, 1982

Valve retrieval mechanism for an inflatable packer system

BJ HUGHES INC7 citations72