Abstract: A method and system for stacking coils in which a coil stacker lifting head can be used to raise one or more coils from a conveyor assembly. The coil stacker lifting head can be automatically actuated using a actuating cylinder and a counter balance cylinder. The coil stacker lifting head can include an expanding mandrel to grab opposite edges of the coil and lift the coil. One or more of the coils can be lifted from a conveyor assembly by the coil stacker lifting head. After the one or more coils are lifted, a carriage assembly can transport the lifted one or more coils to a desired position. Once the one or more coils reach the desired position, the one or more coils are lowered to a surface. Upon reaching the surface, the mandrel automatically collapses to release the one or more coils and the mandrel is released from the coils.

Abstract: The present invention discloses a petroleum instrument hoisting system and a hoisting head, which is used for hoisting a petroleum instrument.

Abstract: The present invention discloses a petroleum instrument salvaging connector, which is set on a salvage end of a petroleum instrument, for being in hooking fit with a salvaging head of a petroleum instrument salvaging device. The petroleum instrument salvaging connector comprises a salvaging connector body (11); the salvaging connector body (11) has a stair-shaped salvaging hole; the stair-shaped salvaging hole is a blind hole and comprises a large-caliber section (111) and a small-caliber section (112); the large-caliber section (111) is located at the bottom of the stair-shaped salvaging hole, and a hooking face (113) facing the bottom of the large-caliber section (111) is formed at the jointing part between the large-caliber section (111) and the small-caliber section (112); and a sand outlet (116) is set at the bottom of the sidewall of the large-caliber section (111). The invention further discloses a petroleum instrument.

Abstract: A grip a no goes in a subterranean tool to properly position grip members held radially outward with a cone on delivery of an uphole force. In the case of a subsurface safety valve that has a flow tube the slips are wedged into the flow tube when the grip tool lands on the no go in the subsurface safety valve and is jarred up. Jarring up using spang jars and weight bars can be repeatedly accomplished without releasing the grip tool from the flow tube. Jarring down unsupports the slips to allow them to retract while one or more springs can be used to prevent a re-grip of the flow tube. The grip tool can now be pulled out of the hole with the flow tube broken loose from accumulated debris for subsequent normal operation of the flow tube with the control system for the subsurface safety valve.

Abstract: An overshot (10, 100, 200) for handling equipment (12) defining a spearhead point (14). The overshot (10, 100, 200) includes: a substantially elongated overshot body (16); a pair of lifting dogs (18) pivotally mounted to the overshot body (16) so as to be movable between a dog closed configuration and a dog open configuration; and a dog control element (26) operatively coupled to the lifting dogs (18) for selectively controlling the movement of the lifting dogs (18) between the dog closed and open configurations, the dog control element (26) being operable between an armed configuration, a locked configuration and a released configuration. In the armed configuration, the lifting dogs (18) are movable between the dog closed and open configurations for allowing insertion of the spearhead point (14) therebetween; in the locked configuration, the lifting dogs (18) are locked in the dog closed configuration; and in the released configuration, the lifting dogs (18) are positioned in the dog open configuration.