Apparatus and methods for pumping solids and undesirable liquids from a well bore
An apparatus is described for removing debris, including solids and liquids, from a well bore comprising: a vertically extending elongate string connectable to a source of reciprocating and rotating motion and having an open lower end, the string including: a debris retaining portion having an outlet and an inlet; a debris retaining check valve positioned below the debris retaining portion to close the inlet; and a downhole pump in fluid communication with the outlet of the debris retaining portion. A method is described for removing debris having a solid component and a liquid component from deep in a well bore comprising: assembling an elongated tool string dimensioned for extension into the well bore. The tool string includes a tubular lower debris collecting portion, an upper portion, and a pump disposed between the debris collecting portion and the upper portion. The pump includes: a hollow piston rod having a lower end connected to the upper end portion of the lower debris collecting portion, and having an upper end; a piston connected to the upper end of the piston rod and having an opening therethrough aligned with the hollow interior of the hollow piston rod for receiving fluid from the hollow piston rod; and a cylinder slidingly enclosing the piston, and having an upper end portion connected to the tool string upper portion for moving up and down in the well bore with the upper portion, and for rotation within the well bore about the axis of the well bore with the tool string upper portion.
- Assignee:
- Adaptable Tool Co., Oklahoma City, OK
- Patent Number(s):
- US 4621693
- OSTI ID:
- 7075173
- Country of Publication:
- United States
- Language:
- English
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