Boring or penetrating the earth – With means movable relative to tool below ground to stop... – Stops flow by movement about fixed pivot
Patent
1976-03-01
1976-12-14
Leppink, James A.
Boring or penetrating the earth
With means movable relative to tool below ground to stop...
Stops flow by movement about fixed pivot
175317, E21B 2700, E21B 4100
Patent
active
039970108
ABSTRACT:
A down hole forward and back scuttling tool capable of being removably connected to a power driven drill string and to an expandable reamer to transmit torque from the drill string to the reamer as the latter is transversely expanded and rotated to form an elongate cavity in the lower portion of the bore hole. The reamer is of a conventional type that permits fluid under pressure to discharge therefrom. The tool during the reaming operation permits fluid under pressure to flow downwardly in a first path through the drill string, tool and reamer to exit from the latter into the cavity and then upwardly through an annulus shaped space defined between the side wall of the bore hole and drill string to the ground surface. Cuttings from the reaming operation drop downwardly due to gravity to the bottom of the cavity. It is desirable that such cuttings be removed from the cavity prior to the latter being packed with gravel. The tool permits these cuttings to be retrieved. Such retrieval is accomplished by reversing the flow of fluid under pressure and causing it to flow through a second path. Fluid under pressure as it is directed through the second path flows downwardly through the annulus into the cavity to create a turbulent condition in at least the lower portion thereof, with the cuttings being lifted from the bottom and entrained with the turbulent fluid, and the fluid with entrained cuttings flowing through ports in the tool to move upwardly through the drill string to the ground surface. A check valve in the tool prevents cuttings that have entered the drill string from moving downwardly through the tool back into the cavity.
REFERENCES:
patent: 1427685 (1922-08-01), Hill
patent: 1565906 (1925-12-01), Clinton
patent: 1638337 (1927-08-01), Hutton
patent: 2239586 (1941-04-01), Appleby
patent: 2307658 (1943-01-01), Appleby
Babcock William C.
Leppink James A.
Midway Fishing Tool Company
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