Patent ID: 8281851
Filing Date: 2012-10-09
Classification: E21B

Abstract:
1. A cable head for use with coiled tubing electric line in well operations, said cable head comprising: a housing comprising: a shearable connection for shearably attaching said lower housing to said upper housing, said shearable connection being shearable in response to relative movement between said upper housing and said lower housing such that said upper housing and said lower housing are separated when tension is applied to the coiled tubing; a locking mechanism disposed between said upper and lower housings for preventing said relative movement and thereby preventing shearing of said shearable connection when said locking mechanism is in a locked condition and allowing shearing of said shearable connection by said relative movement when said locking mechanism is in an unlocked condition; a piston slidably disposed in said housing, said piston having a running position holding said locking mechanism in said locked position and being movable to a releasing position allowing movement of said locking mechanism to said unlocked position; flow ports defined in the housing and communicating a flow path therein with an exterior of the housing to enable circulation of fluid through the flow path, said flow ports being situated on the housing at positions unobstructed by sliding movement of the piston from the running position to the releasing position, whereby said flow ports remain open throughout said sliding movement of the piston; and a cable passage defined in the upper and lower housings to receive the coiled tubing electric line, said cable passage extending from proximate a top end of the upper housing to a position below the flow path and the flow ports.