Down hole pressure pump

Pumps – Intensifier

Patent

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Details

417403, F04B 1700

Patent

active

056326041

ABSTRACT:
The present invention utilizes a combined dual piston and cylinder arrangement surrounded by a sleeve all mounted within a container which is in turn placed within a drill collar. The pressure of the drilling mud within the drill string drives the pressure pump of the present invention by forcing the piston up and down. Stops on the piston rod maneuver a sleeve which opens and closes inlets and outlets so that the desired flow can be obtained to drive the cylinder, piston and rod arrangement up and down. When the pistons are driven downward, drilling mud is forced through a conduit into a drill bit and out a jet nozzle at a high pressure so as to facilitate the fracturing and removal of the formation being drilled.

REFERENCES:
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patent: 4738599 (1988-04-01), Shilling
patent: 5249645 (1993-10-01), Wiklund
patent: 5328339 (1994-07-01), Jong
patent: 5353870 (1994-10-01), Harris
Peters, A.D., Pentrators, Inc., The Lance sm Formation Pentrator System, S.W. Petrol. Short course Form, S.E. and Secor, G.A., The Mechancis of Rock Failure Due to Water Jet Impingement; SPE 4247.
Sutherland, J.A., Increasing Water-Drilling Hydraulics Held . . . ; Oil & Gas Journal, Jul. 1991, pp. 91-94.
T. Butler, et al; A Method for Combined Jet and Mechanical Drilling;; SPE 20460.
Cure, M., Fontana;, P.;Jet-assisted drilling nears commercial use; Oil & Gas Journal, pp. 56-66.
Summers, D.A., and Henry, R.L. Water Jet Cuttin of Rock With and W/O Mech. Assist.; SPE3533.
Iyoho, A.W., Summers, D.A., et al Petroleum Appl. of Emerging High --Pressure Waterjet Tech; SPE26347.

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