Garrett O Jackson
Land Surveyors in Santa Clarita, CA
License number
Utah 175062-9925
Issued Date
Nov 21, 1988
Expiration Date
Dec 31, 1999
Category
Engineer/Land Surveyor
Type
Engineer in Training - Obsolete
Address
Address
Santa Clarita, CA
Professional information
Retrievable Wedging System For Coupling Downhole Devices Into Cased Bore Holes
US Patent:
4840230, Jun 20, 1989
Filed:
Sep 14, 1987
Appl. No.:
7/096860
Inventors:
T. Leslie Youd - Orem UT
Garrett O. Jackson - Valencia CA
Garrett O. Jackson - Valencia CA
Assignee:
Electric Power Research Institute, Inc. - Palo Alto CA
International Classification:
E21B 2300, E21B 33129, B25B 100
US Classification:
166382
Abstract:
A retrievable downhole wedging system is disclosed for firmly securing accelerometers and other instruments to the bottom of a cased bore hole. The system includes a pair of arcuate top wedges and a pair of arcuate bottom wedges for insertion between the accelerometers and the casing. The bottom wedges are slideably coupled to the accelerometer such that they will not become separated from the accelerometer during retrieval. A retrieving means is provided for disengaging the accelerometer by first individually removing the top wedges and then pulling the accelerometer free of the bottom wedges.