Double acting rotary and hammering tool
AssigneeSaudi Arabian Oil Company
InventorBelgacem Becha
Life of this patent
Estimating the term…
Abstract
A tool for building a wellbore includes a tool body with a flow passage extending axially therethrough, a piston chamber formed radially through the tool body that intersects the flow passage of the tool body, a piston disposed in the piston chamber, at least one actuation element that exerts a force between the piston and the piston chamber, and a sleeve disposed within the flow passage of the tool body that includes at least one cutout. When the sleeve is in a first position within the tool body, the cutout is axially offset from the piston, and when the sleeve is in a second position, the cutout is axially aligned with the piston.
Claims20
A tool for building a wellbore, the tool comprising:
- a tool body having a flow passage extending axially therethrough;
- a piston chamber formed radially through the tool body and intersecting the flow passage of the tool body;
- a piston disposed in the piston chamber;
- at least one actuation element exerting a force between the piston and the piston chamber;
- and
- a sleeve comprising at least one cutout and disposed within the flow passage of the tool body,
- wherein when the sleeve is in a first position within the tool body, the cutout is axially offset from the piston and the piston is biased against the sleeve, such that the sleeve retains the piston radially within the tool body;
- and
- wherein when the sleeve is in a second position, the cutout is axially aligned with the piston and the piston extends into the cutout.
A method of hammering cuttings into a sidewall of a wellbore, the method comprising:
- drilling into a formation with a bottom hole assembly to create the wellbore, the bottom hole assembly comprising:
- a drill bit configured to drill the wellbore and create the cuttings,
- a double acting tool configured to hammer the cuttings into the sidewall of the wellbore, the double acting tool comprising:
- a tool body having a flow passage extending axially therethrough;
- a piston chamber formed radially through the tool body and intersecting the flow passage of the tool body;
- a piston assembled to the piston chamber formed in the tool body;
- at least one actuation element provided in the piston assembly;
- and
- a sleeve comprising at least one cutout and disposed in the tool body, wherein the sleeve restrains the piston from being actuated,
- actuating the sleeve from a first position where the cutout is offset from the piston to a second position where the cutout is aligned with the piston, to release the piston into the cutout;
- and
- hammering the cuttings into the wellbore using the release of the piston while drilling.
A bottom hole assembly attached to a drill string, the bottom hole assembly comprising:
- a drill bit positioned at an end of the bottom hole assembly opposite the drill string;
- and
- a double acting tool, the double acting tool comprising:
- a tool body having a flow passage extending axially therethrough;
- a plurality of piston assemblies provided along different axial and circumferential positions around the tool body, each piston assembly comprising:
- a piston retained in a piston chamber, wherein the piston has a fluid passage extending through the piston and in parallel with the flow passage;
- and
- at least one actuation element provided between the piston and the piston chamber;
- and
- a sleeve comprising a plurality of cutouts,
- wherein, when the sleeve is in a first position around the tool body, the cutouts are offset from the piston assemblies and the fluid passage of each piston is coaxial with the flow passage of the tool body, and
- wherein, when the sleeve is in a second position around the tool body, the cutouts are aligned with the piston assemblies and the fluid passage of each piston is radially offset with the flow passage of the tool body.
Dependencies are inferred from the claim text.