Downhole tools
OwnerMichael A. Reid, Blair C. Duncan +3inventors
InventorsMichael A. Reid, Blair C. Duncan, Stuart Gordon, Steven F. Nicol, Irvine C. Brown
Life of this patent
Estimating the term…
Abstract
A fluid operated apparatus in the form of a flow cap, is mounted on an end of a downhole tool or sub, which itself has a screw thread fitting to a further tool, sub or tubular. The cap provides a number of fluid flow channels arranged in a spiral pattern upon the outer surface. The handedness of the channels matches the handedness of the screw thread fitting so that fluid flow from ports in the tool or sub, acts to tighten the screw thread fitting. A water injection valve including a flow cap is described.
Claims14
A fluid operated apparatus for use on a downhole tool or sub comprising, a screw thread formed on an upper end thereof for connection to a further tool, sub or tubular from which it is appended, the apparatus having an outer surface upon which is arranged one or more fluid flow channels, each channel having a fluid inlet arranged at an upper end and a fluid outlet arranged at a lower end, distal from the screw thread, and each channel being formed as a portion of a spiral having a handedness, the handedness being the same as the screw thread at the upper end.
Dependencies are inferred from the claim text.