E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
255/18, 255/14.3
E21B 19/06 (2006.01) E21B 19/08 (2006.01) F16D 31/00 (2006.01)
Patent
CA 1078814
TITLE APPARATUS AND METHOD FOR HYDRAULIC MAKEUP AND CONTROL ABSTRACT OF THE DISCLOSURE An adjustable hydraulic makeup and control system is pro- vided for supplementing the primary hydraulic flow to overcome leak- age and thus be able to maintain a constant pulling load on a grill pipe or other tool in a wall hole for an indefinite length of time.
303795
Cordell James L.
Russell Duane K.
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