Abstract: An apparatus for pulling objects from a well is described. The apparatus may comprise an elongated housing having an internal chamber. The housing will be connected to a work string such as wireline or coiled tubing. A skirt is attached to the housing, with the skirt having an inner portion. The skirt will contain a first window and a second window, with the first window having a first load shoulder and the second window having a second load shoulder. The apparatus further contains a mandrel disposed within the inner portion of the skirt, and two dog members disposed about the mandrel. The dog member have a first surface that cooperates with the first load shoulder and a second surface that cooperates with the second load shoulder. The dog members distributes a pull force which is exerted on the apparatus to the first and second load shoulder so that the effective tensional strength of the skirt is enhanced. The mandrel will have a second end containing an angled shoulder.

Abstract: An apparatus and method for delivering a jarring action to an object in a well bore is disclosed. Generally, the apparatus comprises a cylindrical housing, with the cylindrical housing being connected to the stuck object; and, a power mandrel disposed within said cylindrical housing, with the power mandrel being threadedly connected to a work string. The invention also includes a latch member adapted to the housing, and a collet member having an end engageable with the latch. A conical member is adapted to set, reset and unlatch the engageable end of the collet. Also included will be an activation piston cooperating with the conical member.

Abstract: A method and apparatus for jarring an object in a wellbore is disclosed. Generally, the apparatus contains a body member having an inner and outer diameter, an operator mandrel slidably disposed within the inner diameter of the body member, and a selective attachment member for selectively attaching and detaching the operator mandrel to the body member. The apparatus may also contain a mechanism to reset the operator mandrel with the body member when the operator mandrel has been released.