Patent ID: 8534714

Claim:
A coupling device for connection and disconnection of bottomhole equipment, comprising: a male part having a conically shaped stinger with locking grooves, the male part being configured to be attached to an end of a coiled tubing; and a female part adapted to be joined with the male part, the female part comprising a receptacle in an upper end thereof and a housing that constitutes an outer part of the female part extending from the receptacle to a lower end of the female part, the receptacle having a conical shape for receiving the stinger of the male part, wherein the female part further comprises: a hold open sleeve physically separate from the male part, located within the housing, and axially displaceable in the housing from a position at the upper end of the female part, adjacent to and below the receptacle, toward the lower end of the female part, the hold open sleeve having an internal diameter smaller than a diameter of the receptacle; locking dogs arranged between the housing and the hold open sleeve, with a first biasing device for pushing the locking dogs from an extended position radially inwards; a locking sleeve located within the housing below the locking dogs and axially displaceable therein, with a second biasing device for pushing the locking sleeve axially upwards, the locking sleeve having an internal diameter toward the upper end large enough to receive the hold open sleeve and an outer diameter smaller than or equal to a diameter defined by the locking dogs in the extended position; and a verifying bolt provided on the housing, with a third biasing device for pushing the verifying bolt radially inwards from a position in which an outer end of the verifying bolt extends out of the housing, wherein the female part is further arranged such that upon joining the male and female parts, the hold open sleeve of the female part is pushed by the stinger of the male part into the locking sleeve, thereby causing the locking dogs to be pushed radially inwards into the grooves of the stinger, and the locking sleeve to be pushed up axially upwards to lock said locking dogs in the grooves, thereby automatically locking the coupling device, and causing the verifying bolt to be pushed so that an inner end of the bolt enters into an opening in the locking sleeve, thereby verifying correct locking, and wherein prior to the hold open sleeve being pushed by the stinger, the hold open sleeve is arranged within the housing of the female part.