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US 5,240,229 AGranted
Bailer hoist
OwnerRobert D. Timmonsinventor
Life of this patent
Estimating the term…
Abstract
A hoist for lifting and lowering an equipment in a well comprises base member; a belt for removably securing the base member to a vertical wall portion of the well casing; a boom with its first end being secured to the base member and its second end extending above the well casing; and a winch assembly operably associated with the boom for lowering and lifting the equipment in the well.
Claims17
A hoist for lifting and lowering an equipment in a well, said hoist comprising:
- a) a base member;
- b) said base member including a plurality of opposed resilient walls having surfaces adapted to engage a vertical wall portion of a well casing, said resilient walls being adapted to spread apart from each other and thereby becoming biased toward respective opposed walls when said surfaces engage the vertical wall portion of the well casing;
- c) a belt secured to said base member for removably securing said base member to the vertical wall portion of the well casing;
- d) a boom having one end secured to said base member and a free end disposed above the well casing;
- and
- e) cable disposed on said boom for lowering and lifting an equipment in the well.
3 more elements
A hoist for lifting and lowering an equipment in a well, said hoist comprising:
- a) a base member;
- b) a winch secured to said base member;
- c) a belt secured between said winch and said base member for removably securing said base member to a well casing such that said belt makes a complete loop around said base member and the well casing when said base member is secured to the well casing;
- d) a boom having first and second ends, said first end being secured to said base member, said second end extending above the well casing;
- and
- e) a cable secured to said winch and disposed on said boom for lowering and lifting an equipment in the well.
3 more elements
Dependencies are inferred from the claim text.