Down hole pressure pump
AssigneeMilmac
InventorSathyanarayanan Poothodiyil
Life of this patent
Estimating the term…
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.
Claims8
A down hole pressure pump comprising:
- a. A container;
- b. A first cylinder defined by a cylinder wall, mounted within said container;
- c. Upper and lower inlet and outlet ports formed in said first cylinder;
- d. Upper and lower inlet and outlet ports formed in said container corresponding to the inlet and outlet ports of said first cylinder;
- e. A second cylinder integrally formed below said first cylinder said second cylinder containing an inlet port and an outlet port;
- f. A large piston complementary to the interior of said first cylinder affixed to a smaller piston complementary to the interior of said second cylinder;
- and
- g. A chamber with first and second inlet ports and first and second outlet ports said first inlet and outlet ports each communicating to said first cylinder while said second inlet port communicates to said first cylinder so as to allow the chamber to accept and return fluid from said first cylinder and, to accept fluid from said second cylinder and release fluid away from said entire pump through said second outlet;
- h. Means for filling said first cylinder with drilling mud so as to force said larger and smaller piston upward and then downward such that the fluid from said chamber is drawn into said second cylinder said fluid being forced out said second cylinder outlet when said drilling mud forces said larger piston downward.
Dependencies are inferred from the claim text.