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, wherein one of the opposing half shells comprises a dowel pin;
- external wheels mounted on the opposing half shells;
- and
- cable inserts disposed in the opposing half shells, wherein the ends of each cable insert are chamfered.
A low friction wireline standoff, comprising:
- a first assembly comprising a first half shell, a first cable insert comprising about half a casing, wherein the first cable insert is disposed in the first half shell, and first exterior wheels coupled to the first half shell;
- and
- a second assembly comprising a second half shell, a second cable insert comprising about half a casing, wherein the second cable insert is disposed in the second half shell, and second exterior wheels coupled to the second half shell;
- wherein the first assembly and the second assembly are configured to mate together to clamp around a portion of a wireline cable;
- wherein the first half shell and the second half shell are opposite and adjacent to each other;
- and
- wherein the ends of the first cable insert and the second cable insert are chamfered.
A wireline assembly comprising:
- a wireline cable;
- a low friction wireline standoff;
- wherein the low friction wireline standoff comprises adjacent opposing half shells, wherein the opposing half shells are vacuum hardened;
- external wheels mounted on the opposing half shells, wherein the external wheels are secured by a detachable slotted wheel retainer;
- and cable inserts comprising a casing and a cable insert flange are disposed in the opposing half shells, the cable inserts being coupled to the wireline cable;
- 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.