Transmission element for downhole drilling components
First Claim
1. A transmission element for transmitting information between downhole tools located on a drill string, the transmission element comprising:
- an annular core constructed of a magnetically-conductive material;
at least one conductor coiled around the annular core and electrically isolated therefrom;
an annular housing constructed of an electrically conductive material and partially enclosing the annular core and the at least one conductor;
the annular housing further shaped to reside with an annular recess formed into a surface of a downhole tool, and being electrically insulated from the surface thereof;
a biasing member to effect a bias between the annular housing and the annular recess, urging the annular housing in a direction substantially perpendicular to the surface.
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Accused Products
Abstract
An apparatus for transmitting data between downhole tools is disclosed in one embodiment of the present invention as including an annular core constructed of a magnetically-conductive material. At least one conductor, electrically isolated from the annular core, is coiled around the annular core. An annular housing constructed of an electrically conductive material is used to partially enclose the annular core and the conductive coil. The annular housing is shaped to reside within an annular recess formed into a surface of a downhole tool, and is electrically insulated from the surface. A biasing member is used to effect a bias between the annular housing and the annular recess, urging the annular housing in a direction substantially perpendicular to the surface.
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Citations
21 Claims
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1. A transmission element for transmitting information between downhole tools located on a drill string, the transmission element comprising:
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an annular core constructed of a magnetically-conductive material;
at least one conductor coiled around the annular core and electrically isolated therefrom;
an annular housing constructed of an electrically conductive material and partially enclosing the annular core and the at least one conductor;
the annular housing further shaped to reside with an annular recess formed into a surface of a downhole tool, and being electrically insulated from the surface thereof;
a biasing member to effect a bias between the annular housing and the annular recess, urging the annular housing in a direction substantially perpendicular to the surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A transmission element for transmitting information between downhole tools located on a drill string, the transmission element comprising:
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an annular core constructed of a magnetically-conductive material;
at least one conductor coiled around the annular core and electrically isolated therefrom;
an annular housing constructed of an electrically conductive material and partially enclosing the annular core and the at least one conductor;
the annular housing further shaped to reside with an annular recess formed into a surface of a downhole tool, and being electrically insulated from the surface thereof;
means for effecting a bias between the annular housing and the annular recess;
- View Dependent Claims (12, 13, 14, 15)
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16. An apparatus for transmitting information between downhole tools located on a drill string, the apparatus comprising:
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a first transmission element, mounted to the end of a first downhole tool, the first transmission element comprising a first contact;
a second transmission element, mounted to the end of a second downhole tool connectable to the first downhole tool, the second transmission element comprising a second contact configured to physically contact the first contact upon connecting the first and second downhole tools; and
an isolation mechanism configured to isolate the first and second contacts from an adjacent environment when contact occurs between the first and second contacts. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification