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US 9,175,515 B2Granted
Wired mud motor components, methods of fabricating the same, and downhole motors incorporating the same
AssigneeSchlumberger Technology Corporation
InventorJoachim Sihler
Life of this patent
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Abstract
Exemplary embodiments provide systems and methods for minimizing erosion of a transmission cable extending through a downhole drilling assembly. The drilling assembly includes an elongated flow diverter having a plurality of apertures for diverting the drilling fluid from an axial flow through a transmission shaft to a radial flow through a drive shaft. Exemplary flow diverters are configured to minimize erosion of transmission cables that may be present adjacent to the flow diverters.
Claims24
A system for drilling, comprising:
- a drive shaft for transmitting a torque to a downhole tool, the drive shaft having a hollow central passage formed by a tubular wall extending along a longitudinal axis L thereof, the hollow central passage allowing a flow of a drilling fluid through a bearing section of the system;
- and
- an elongated flow diverter disposed in the tubular wall of the drive shaft, the elongated flow diverter having a body comprising a plurality of axially-spaced apertures distributed along the longitudinal axis L of the drive shaft and the hollow central passage, the distribution of the plurality of apertures along the longitudinal axis L reducing the impingement of the drilling fluid while diverting the flow of the drilling fluid from an upstream annulus section of the system to the hollow central passage.
A system for drilling, comprising:
- a drive shaft for transmitting a torque to a downhole tool, the drive shaft having a tubular wall around a hollow central passage for carrying a flow of drilling fluid, the tubular wall having a bore extending from a first end to a second end through the tubular wall along a longitudinal axis thereof and external to the hollow central passage;
- a flow diverter having a body disposed in the tubular wall of the drive shaft between the first end and the second end, the flow diverter including a plurality of axially-spaced apertures distributed along the longitudinal axis of the drive shaft and the hollow central passage, wherein the apertures are configured to divert drilling fluid flow from an upstream annulus section of the system to the hollow central passage;
- and
- an electrical cable extending through the bore in the tubular wall of the drive shaft for supplying electrical power to the downhole tool.
1 more element
Dependencies are inferred from the claim text.