Electro-optic cablehead and methods for oilwell applications
First Claim
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1. An oil and gas well assembly comprising:
- a wireline cable comprising at least one optical fiber;
a downhole tool comprising at least one optical fiber; and
a cablehead comprising a first end connected to the wireline cable, a second end connected to the downhole tool, and at least one optical fiber extending therethrough which transmits data between the at least one downhole tool optical fiber and the at least one wireline cable optical fiber; and
a lower bulkhead assembly which seals off pressure therepast, and wherein the at least one cablehead optical fiber is precisely aligned with the at least one downhole tool optical fiber past the lower bulkhead assembly to allow communication therebetween.
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Abstract
An oil and gas well assembly is provided that includes a wireline cable having at least one optical fiber; a downhole tool having at least one optical fiber; and a cablehead having a first end connected to the wireline cable, a second end connected to the downhole tool. The cablehead further includes at least one optical fiber which transmits data between the at least one downhole tool optical fiber and the at least one wireline cable optical fiber.
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Citations
25 Claims
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1. An oil and gas well assembly comprising:
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a wireline cable comprising at least one optical fiber; a downhole tool comprising at least one optical fiber; and a cablehead comprising a first end connected to the wireline cable, a second end connected to the downhole tool, and at least one optical fiber extending therethrough which transmits data between the at least one downhole tool optical fiber and the at least one wireline cable optical fiber; and a lower bulkhead assembly which seals off pressure therepast, and wherein the at least one cablehead optical fiber is precisely aligned with the at least one downhole tool optical fiber past the lower bulkhead assembly to allow communication therebetween. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An oil and gas well assembly comprising:
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a wireline cable comprising at least one optical fiber; a downhole tool comprising at least one optical fiber; and a cablehead comprising; a housing comprising a first end connected to the wireline cable, and a second end connected to the downhole tool, first and second bulkheads connected to the housing such that a pressure sealed area is formed between the first and second bulkheads, at least one optical fiber which transmits data between the at least one downhole tool optical fiber and the at least one wireline cable optical fiber, wherein the at least one wireline cable optical fiber is connected to the at least one cablehead optical fiber within the pressure sealed area, and a lower bulkhead assembly connected to the housing which seals off pressure therepast, and wherein the at least one cablehead optical fiber is precisely aligned with the at least one downhole tool optical fiber past the lower bulkhead assembly to allow communication therebetween. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of transmitting data in an oil and gas well assembly comprising:
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providing a wireline cable with at least one optical fiber; providing a downhole tool with at least one optical fiber; providing a cablehead with a housing, first and second upper bulkheads, a lower bulkhead, and at least one optical fiber; forming a first pressure sealed area between the first and second upper bulkheads, forming a second pressure sealed area past the lower bulkhead; connecting the at least one wireline cable optical fiber to the at least one cablehead optical fiber in the first pressure sealed area; connecting the at least one cablehead optical fiber to the at least one downhole tool optical fiber in the second pressure sealed area; and transmitting data between the at least one downhole tool optical fiber and the at least one wireline cable optical fiber through the at least one cablehead optical fiber. - View Dependent Claims (21, 22, 23, 24, 25)
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Specification