Drilling jar for use in a downhole network
First Claim
1. A wired downhole drilling tool comprising:
- a housing;
a mandrel insertable into the housing, wherein the mandrel is axially translatable with respect to the housing;
a coiled cable, enclosed by the housing, having a first end connected to the housing and a second end connected to the mandrel, the coiled cable configured to elongate and shorten in accordance with axial movement between the housing and the mandrel;
a clamp effectively fixing the coiled cable with respect to at least one of the housing and the mandrel, to accommodate a change of tension in the coiled cable.
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Accused Products
Abstract
Apparatus and methods for integrating transmission cable into the body of selected downhole tools, such as drilling jars, having variable or changing lengths. A wired downhole-drilling tool is disclosed in one embodiment of the invention as including a housing and a mandrel insertable into the housing. A coiled cable is enclosed within the housing and has a first end connected to the housing and a second end connected to the mandrel. The coiled cable is configured to stretch and shorten in accordance with axial movement between the housing and the mandrel. A clamp is used to fix the coiled cable with respect to the housing, the mandrel, or both, to accommodate a change of tension in the coiled cable.
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Citations
24 Claims
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1. A wired downhole drilling tool comprising:
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a housing;
a mandrel insertable into the housing, wherein the mandrel is axially translatable with respect to the housing;
a coiled cable, enclosed by the housing, having a first end connected to the housing and a second end connected to the mandrel, the coiled cable configured to elongate and shorten in accordance with axial movement between the housing and the mandrel;
a clamp effectively fixing the coiled cable with respect to at least one of the housing and the mandrel, to accommodate a change of tension in the coiled cable. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for wiring a downhole drilling tool having a housing and a mandrel insertable into the housing, wherein the mandrel is axially translatable with respect to the housing, the method comprising:
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connecting a first end of a coiled cable to the mandrel;
connecting a second end of the coiled cable to the housing, the coiled cable configured to elongate and shorten in accordance with axial movement between the housing and the mandrel;
fixing the coiled cable with respect to at least one of the housing and the mandrel, to accommodate a change of tension in the coiled cable. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A wired downhole drilling tool comprising:
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a housing;
a mandrel insertable into the housing, wherein the mandrel is axially translatable but rotationally fixed with respect to the housing;
a cable coiled around the mandrel and enclosed by the housing;
a clamp effectively fixing the cable with respect to at least one of the housing and the mandrel, to accommodate a change of tension in the cable.
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Specification