Circulation tool
AssigneeSpecialised Petroleum Services Limited
InventorsMark Carmichael, Paul Howlett
Life of this patent
Estimating the term…
Abstract
A tool or sub for use in a well bore is adapted to manipulate the circulation path of fluid through a drill string or work string in which the tool is connected. The apparatus has a body member defining an axial flow path with one or more radial outlets that may be opened or closed by respective valve members in use.
Claims15
Apparatus for use in a well bore comprising a body member connectable in or to a drill string and one or more valve members, the body member having a radial outlet associated with each valve member and an axial bore providing passage for drilling fluid between an axial inlet and an axial outlet, and between the axial inlet and each radial outlet, wherein each valve member is moveable between a respective first position at which the associated radial outlet is in either one of an open or a closed state and a second position at which the associated radial outlet is an alternative closed or open state, and characterised in that the valve member allows for fluid flow through or at least partially through the axial bore when in either of the aforementioned positions.
A down hole tool or sub comprising a body member having an inlet and first and second outlets, the first outlet being generally located below or beyond the second outlet when the tool is run, and means for controllably closing the second outlet while maintaining a circulation path between the inlet and the first outlet.
Apparatus for use in a well bore comprising a body member connectable in or to a drill string and one or more valve members, the body member having a radial outlet associated with each valve member and an axial bore providing passage for drilling fluid between an axial inlet and an axial outlet, and between the axial inlet and each radial outlet, wherein each valve member is moveable between a respective first position at which the associated radial outlet is in either one of an open or a closed state and a second position at which the associated radial outlet is an alternative closed or open state, wherein the valve member allows for fluid flow through or at least partially through the axial bore when in either of the aforementioned positions, and characterised in that a rotatable sleeve is mounted on the outside of the body member, the sleeve comprising jet outlets aligned with the radial outlets on the body member, wherein also at least some of the jet outlets are directed tangentially so that the reaction forces of fluid expelled from the one or more tangential jet outlets create a turning moment sufficient to cause rotation of the sleeve relative to the body member.
A down hole tool or sub comprising a body member having an inlet and a first and second outlet, the first outlet being generally located below or beyond the second outlet when the tool is run, and means for controllably closing the second outlet while maintaining a circulation path between the inlet and the first outlet wherein a rotatable sleeve is mounted on the outside of the body member, the sleeve comprising jet outlets aligned with the radial outlets on the body member, wherein also at least some of the jet outlets are directed tangentially so that the reaction forces of fluid expelled from the one or more tangential jet outlets create a turning moment sufficient to cause rotation of the sleeve relative to the body member.
Dependencies are inferred from the claim text.