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Abstract

The present invention is a method and apparatus for inserting electric wireline tools into a wellbore using an apparatus comprising pipe assembled from sections and coiled tubing having a coaxially inserted wireline. The method includes the steps of attaching a first part of a submersible electrical connector to one end of the coiled tubing and to the wireline inside the coiled tubing. A second part of the submersible connector is attached to one end of the wireline tools. A first part of a selectively operable latching mechanism is attached to the same end of the wireline tools. A second part of the latching mechanism forms part of a latching sub which is attached to one end of the pipe. The tools are attached to the pipe by engaging the first and second parts of the latching mechanism, and the tools are inserted into the wellbore to a predetermined depth by assembling the sections of the pipe. The coiled tubing is then inserted into the interior of the pipe until the submersible connector is engaged. The latching mechanism is selectively operated to release the tools from the sub, and the coiled tubing is inserted further into the wellbore until the tools reach a desired depth. The coiled tubing is then withdrawn until the tools engage the sub. The latching mechanism is then selectively operated so that the tools are attached to the sub. The coiled tubing is then withdrawn from the pipe, which disengages the submersible connector. The tools are then withdrawn from the wellbore by disassembling the sections of the pipe.

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First Claim