Drilling motor interior valve
AssigneeBico Drilling Tools, Inc.
InventorsDavid Barker, Kosay Ibrahim El-Rayes
Life of this patent
Estimating the term…
Abstract
A drilling motor provides rotational force within a wellbore and includes a power section within the interior of a housing, a rotor positioned within the power section, and a passage within the rotor. The passage is configured to bypass a portion of the drilling mud from above the power section within the interior of the housing to below the power section within the interior of the housing, and an interior valve at a downstream end of the passage, wherein the valve includes a rupture disc configured to close the passage when the pressure from the drilling mud is less than a threshold pressure, and to rupture to open the passage and pass the drilling mud through the valve when the pressure from the drilling mud is greater than the threshold pressure.
Claims13
A drilling motor for providing rotational force within a wellbore, comprising:
- a housing comprising an interior and an exterior, wherein the housing is configured to connect to a drill string that receives drilling mud from the surface of the wellbore;
- a power section within the interior of the housing;
- a rotor positioned within the power section and configured to rotate in response to pressure from the drilling mud;
- a passage within the rotor, wherein the passage is configured to bypass a portion of the drilling mud from above the power section within the interior of the housing to below the power section within the interior of the housing;
- and
- an interior valve at a downstream end of the passage, wherein the valve includes a rupture disc configured to close the passage when the pressure from the drilling mud is less than a threshold pressure, and to rupture to open the passage and pass the drilling mud through the valve when the pressure from the drilling mud is greater than the threshold pressure.
A method for relieving pressure in a drilling motor, comprising:
- receiving a drilling mud to the drilling motor through a drilling string;
- rotating a rotor of the drilling motor, wherein the rotor rotates within a power section of a housing of the drilling motor in response to a pressure provided by the drilling mud, and wherein the rotor comprises an internal passage that is initially closed via an interior valve located within the drilling motor and at a downstream end of the passage, the interior valve comprising a rupture disc that closes the passage when the pressure from the drilling mud is less than a threshold pressure;
- and
- opening the interior valve by rupturing the rupture disc when the pressure from the drilling mud is above the threshold pressure, wherein opening the valve bypasses a portion of the drilling mud through the passage within the rotor, wherein the passage flows from above the power section within the housing to below the power section within the housing.
A system for drilling a well, comprising:
- a drill string configured to convey drilling mud from a surface pump;
- a drilling motor connected to the drill string, comprising:
- a housing comprising an interior and an exterior, wherein the housing is configured to connect to the drill string;
- a power section within the interior of the housing;
- a rotor positioned within the power section and configured to rotate in response to pressure from the drilling mud;
- a passage within the rotor, wherein the passage is configured to bypass a portion of the drilling mud from above the power section within the interior of the housing to below the power section within the interior of the housing;
- and
- an interior valve at a downstream end of the passage, wherein the valve includes a rupture disc configured to close the passage when the pressure from the drilling mud is less than a threshold pressure, and to rupture to open the passage and pass drilling mud through the valve when the pressure from the drilling mud is greater than the threshold pressure;
- a drill bit connected to, and configured to rotate with, the rotor, wherein the drill bit comprises drilling nozzles that spray the drilling mud;
- and
- an additional downhole tool configured to be powered by the drilling mud.
Dependencies are inferred from the claim text.