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US 10,246,957 B2Granted
Downhole tool and method to boost fluid pressure and annular velocity
AssigneeHalliburton Energy Services, Inc.
InventorAlan William Marr
Life of this patent
Estimating the term…
Abstract
A disclosed embodiment of a downhole tool includes a pump that is powered by rotation of the drill string to increase fluid pressure during downhole circulation.
Claims17
A tool for boosting fluid pressure downhole, the tool comprising:
- a tool housing configured for coupling to a drill string, the tool housing defining a fluid flow passage;
- a sleeve rotatably positioned around the tool housing, the sleeve comprising one or more gripping members on an outer portion of the sleeve configured to grip a wellbore wall;
- a drive shaft passing through the tool housing and having a central gear;
- at least one drive gear rotatably coupled to the sleeve, the at least one drive gear meshing both with an inner portion of the sleeve and with the central gear, wherein the at least one drive near is rotatably coupled about an axis parallel to an axis of the tool housing;
- and
- a pump mechanism coupled to the drive shaft to receive power imparted by rotation of the drive shaft, the pump configured to increase a fluid pressure within the flow passage.
3 more elements
A tool for boosting fluid pressure downhole, the tool comprising:
- a tool housing which rotates in relation to a wellbore wall, the tool housing defining a flow passage in which fluid can flow;
- a drive gear comprising:
- a first friction transfer element having a portion which extends out from the tool housing and a portion which extends into the tool housing;
- and
- a second friction transfer element having a portion which extends out from the tool housing and a portion which extends into the tool housing, wherein the portions of the first and second friction transfer elements that extend out from the tool housing grip the wellbore wall to create a rotational force when the tool housing is rotated, wherein the drive gear is rotatably coupled about an axis parallel to an axis of the tool housing;
- a drive shaft operationally coupled to the first and second friction transfer elements whereby, during rotation of the tool housing, the first and second friction transfer elements transfer the rotational force to the drive shaft, thereby resulting in rotation of the drive shaft;
- and
- a pump mechanism positioned along the flow passage and operationally coupled to the drive shaft to thereby receive the rotational force imparted by the drive shaft, thus driving the pump mechanism to boost a pressure of fluid traveling through the flow passage.
5 more elements
A method for boosting fluid pressure in a wellbore, the method comprising:
- positioning a downhole tool at a desired location along the wellbore, whereby fluid travels through a flow passage of the downhole tool;
- rotating the downhole tool in relation to an opposing surface to produce a rotational force, wherein rotating the downhole tool to produce the rotational force further comprises:
- gripping the opposing surface using a rotating sleeve positioned around the downhole tool;
- rotating the downhole tool while the rotating sleeve remains stationary;
- rotating a drive gear operationally coupled to the rotating sleeve in response to rotation of
- the downhole tool, wherein the drive gear is rotatably coupled about an axis parallel to an axis of the tool housing;
- rotating a drive shaft operationally coupled to the drive gear in response to rotation of the drive gear;
- and
- utilizing the rotational force to drive a pump mechanism to thereby boost a pressure of the fluid traveling through the downhole tool.
6 more elements
Dependencies are inferred from the claim text.