Terry Lee Logan
Engineers at Lucky John Dr, Park City, UT
License number
Colorado 23257
Issued Date
Feb 15, 1985
Renew Date
Oct 12, 1993
Expiration Date
Oct 12, 1993
Type
Professional Engineer
Address
Address
2040 Lucky John Dr, Park City, UT 84060
Personal information
See more information about Terry Lee Logan at radaris.comName
Address
Phone
9983 Gathering Pl, South Jordan, UT 84095
778 Riderwood Way, Provo, UT 84601
1235 N 1160 W, Orem, UT 84057
1258 W 14600 S, Bluffdale, UT 84065
Professional information
See more information about Terry Lee Logan at trustoria.com
Gob Methane Drainage System
Gob Methane Drainage System
US Patent:
4978172, Dec 18, 1990
Filed:
Oct 26, 1989
Appl. No.:
7/426848
Inventors:
Jeffrey J. Schwoebel - South Jordan UT
Terry L. Logan - Park City UT
Terry L. Logan - Park City UT
Assignee:
Resource Enterprises, Inc. - Salt Lake City UT
International Classification:
E21B 4300, E21C 4118
US Classification:
299 12
Abstract:
A system for recovering methane gas from a coal seam and rock strata and other coal seams above a coal seam being mined or as has been previously mined. The system involves directionally drilling one or more degas holes from a surface location that curve to extend above and essentially parallel, near parallel or slanted to a coal seam to be mined or as has been previously mined. The degas hole is spaced an appropriate vertical distance above the coal seam, usually twenty (20) to two hundred (200) feet, depending on the mining technique being employed and rock strata characteristics. The degas hole is to draw methane gas under vacuum or pressure differential from the gob that is created when the overburden is collapsed. Multiple degas holes can be formed from the same surface location to run parallel to, across and even at an angle to a coal seam.