Low Friction Wireline Standoff
OwnerGuy Wheater, Stuart Huytoninventors
Life of this patent
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Abstract
The low friction wireline standoff improves wireline cable performance during borehole logging operations. The use of low friction wireline standoffs ameliorates the effects of wireline cable differential sticking, wireline cable key-seating, and high wireline cable drags, by reducing or eliminating contact of the wireline cable with the borehole wall during the logging operation. The low friction wireline standoff comprises external wheels mounted on two finned half shells that clamp onto the wireline with precision cable inserts which are manufactured to fit a wide range of logging cables. The wheels reduce the cable drag down-hole resulting in lower surface logging tensions, aiding conveyance in deep and deviated wells.
Claims20
A low friction wireline standoff, comprising:
- adjacent opposing half shells;
- a plurality of external fins, wherein at least one of the plurality of external fins is disposed on each of the half shells;
- a wheel sub assembly disposed on at least one of the plurality of external fins, wherein at least one wheel is mounted within at least one wheel sub assembly;
- and
- a slotted wheel retainer that houses the at least one wheel in the wheel sub assembly.
A low friction wireline standoff, comprising:
- a first assembly comprising a first half shell, a first plurality of external fins disposed on an exterior of the first assembly, a first set of sub assemblies disposed on the first plurality of external fins, and wherein the first set of sub assemblies comprises at least one wheel;
- a second assembly comprising a second half shell, a second plurality of external fins disposed on an exterior of the second assembly, a second set of sub assemblies disposed on the first plurality of external fins, and wherein the second set of sub assemblies comprises at least one wheel;
- and
- wherein the first assembly and the second assembly are configured to mate together to clamp around a portion of a wireline cable.
A wireline assembly comprising:
- a wireline cable;
- a low friction wireline standoff;
- wherein the low friction wireline standoff comprises adjacent opposing half shells, external wheels mounted on the opposing half shells, and cable inserts;
- wherein the wireline standoff comprises an interior;
- and
- wherein the wireline cable extends through the interior of the wireline standoff.
Dependencies are inferred from the claim text.