Measuring and testing – Borehole or drilling – Downhole test
Patent
1990-10-23
1993-06-22
Williams, Hezron E.
Measuring and testing
Borehole or drilling
Downhole test
166264, 418 48, E21B 4700
Patent
active
052208290
ABSTRACT:
A downhole formation test pump includes a progressive cavity pump having a helical rotor received in a helical cavity of a stator. The pump may be disengaged by withdrawing the rotor from the stator to provide a bypass position so that the downhole formation being tested can be allowed to flow freely if it is capable.
REFERENCES:
patent: 2674126 (1954-04-01), Coberly
patent: 3113455 (1963-12-01), Sloan et al.
patent: 4187918 (1980-02-01), Clark
patent: 4592427 (1986-06-01), Morgan
patent: 5097902 (1992-03-01), Clark
Exhibit A--Traco Industries, Inc. brochure entitled "SSJ.TM. For DST Drill Stem Testing" (1987).
Exhibit B--SPE Paper No. 9607, Cobbett, "Use of a Down-Hole Mud Motor as a Pump for Drill-Stem Testing" (1981).
Exhibit C--"Norton Christensen Information" (1984).
Exhibit D--Portion of brochure of Norton Christensen (undated but admitted to be prior art).
Exhibit E--Brochure of Eastman Christensen entitled "Subsurface Oil Well Pumps Econo-pump" (undated but admitted to be prior art).
Exhibit F--Bulletin 300B of Robbins & Myers entitled "Moyno Down-Hole Oil Well Pumps" (undated but admitted to be prior art).
Exhibit G--Bulletin 310 of Robbins & Myers entitled "How We Build Your Moyno.RTM. Motor" (1985).
Manke Kevin R.
Powers Harold E.
Smith David R.
Beavers L. Wayne
Dombroski George M.
Duzan James R.
Halliburton Company
Williams Hezron E.
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