Patent ID: 6450541
Filing Date: 2002-09-17
Classification: E21B

Abstract:
A releasable connector arranged to be connected between coiled tubing, a pipe string or similar tubular string and a tool/piece of equipment, comprising:two sleeve-shaped inter-connectable parts configured to be releaseable, of which one is connected to the coiled tubing, and the other is connected to said tool/equipment; a locking device configured to hold the two sleeve-shaped parts of the connector in a blocked non-released position; a retaining sleeve configured to keep the locking device in its locking position, wherein the retaining sleeve is axially displaceable for releasing the connector, said retaining sleeve releasing said locking device by a sufficient, axial displacing movement, said locking device thereby initiating the release; and a coaxial displaceable piston body with a transversal end surface, which can be influenced by fluid pressure in order to start a releasing process, and which, on displacement, influences the locking device to release its locking effect and allow division of the connector into said two inter-connectable parts, wherein the piston body has a spring arranged thereto, which resists the displacement of said piston, and is arranged in a spring chamber, whose one defining surface forms a transversal surface of the piston body, and wherein the initial position of the connector the spring chamber is filled with a medium for which there is provided a cavity receiving medium forced out and guiding it through an opening, said forcing out of the medium through the opening providing a delay on the displacement of the piston body and the compression of the spring means, and thus a release delay.