Comments on: This question related to oil & gas well drilling and wireline operation? http://askalandman.com/this-question-related-to-oil-gas-well-drilling-and-wireline-operation.htm Questions and Answers Sat, 11 Feb 2012 00:01:47 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: tlbs101 http://askalandman.com/this-question-related-to-oil-gas-well-drilling-and-wireline-operation.htm/comment-page-1#comment-1763 tlbs101 Sat, 13 Jun 2009 15:52:58 +0000 http://askalandman.com/this-question-related-to-oil-gas-well-drilling-and-wireline-operation.htm#comment-1763 I used to do wireline logging over 25 years ago. I have not heard the term electro-magnetic line, but I suspect it is just a marketing term for coaxial cable. All of the wireline logging I did used braided cable with 7 conductors in the center of the cable. All signals and power were multiplexed onto those 7 conductors. With the proper technology (that was not available 25 years ago), it is now possible to multiplex several signals onto one coaxial cable (using any number of techniqies: time-division multiplexing, frequency division multiplexing, broadband transmission of modulated RF, and more). Power can be sent down-hole on the 2 conductors. It may also be possible that the outer metal of the slickline acts as the outer conductor, so all you would need is the slickline metal, a concentric insulator, and a small inner conductor to make a coaxial cable. This arrangement would be far cheaper to make than a multi-conductor braided cable. Of course there is still the matter of strength. A slickline cannot be used for deep wells, or with heavy tool stacks. . I used to do wireline logging over 25 years ago. I have not heard the term electro-magnetic line, but I suspect it is just a marketing term for coaxial cable.

All of the wireline logging I did used braided cable with 7 conductors in the center of the cable. All signals and power were multiplexed onto those 7 conductors.

With the proper technology (that was not available 25 years ago), it is now possible to multiplex several signals onto one coaxial cable (using any number of techniqies: time-division multiplexing, frequency division multiplexing, broadband transmission of modulated RF, and more). Power can be sent down-hole on the 2 conductors.

It may also be possible that the outer metal of the slickline acts as the outer conductor, so all you would need is the slickline metal, a concentric insulator, and a small inner conductor to make a coaxial cable.

This arrangement would be far cheaper to make than a multi-conductor braided cable. Of course there is still the matter of strength. A slickline cannot be used for deep wells, or with heavy tool stacks.

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