METHOD AND APPARATUS FOR LOGGING A WELL USING A FIBER OPTIC LINE AND SENSORS
First Claim
1. A casing collar locator adapted to detect casing collars disposed in a wellbore, comprising:
- a fiber optic line carrying an optical signal;
a magnetic device adapted to become magnetically connected to a casing collar as the magnetic device passes the casing collar;
a modulator that is functionally connected to the magnetic device;
wherein the optical signal is modulated by the modulator when the magnetic device passes the casing collar.
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Accused Products
Abstract
A system and method to log a wellbore, comprising a logging tool adapted to be deployed in a wellbore environment, the logging tool including at least one sensor for taking a measurement of the wellbore environment. The sensor is a fiber optic sensor and the system includes a fiber optic line in optical communication with the sensor. The data measured by the sensor is transmitted through the fiber optic line on a real time basis to the surface, where the data is processed into a real time display. In one embodiment, the fiber optic sensor is a passive sensor not requiring electrical or battery power. In another embodiment, a continuous tube with one end at the earth'"'"'s surface and the other end in the wellbore is attached to the logging tool and includes the fiber optic line disposed therein.
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Citations
20 Claims
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1. A casing collar locator adapted to detect casing collars disposed in a wellbore, comprising:
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a fiber optic line carrying an optical signal; a magnetic device adapted to become magnetically connected to a casing collar as the magnetic device passes the casing collar; a modulator that is functionally connected to the magnetic device;
wherein the optical signal is modulated by the modulator when the magnetic device passes the casing collar. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for identifying the location of casing collars disposed in a wellbore, comprising:
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providing a magnetic device adapted to become magnetically connected to a casing collar as the magnetic device passes the casing collar; and modulating an optical signal transmitted through a fiber optic line when the magnetic device passes the casing collar. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification