| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 166098000 | GRAPPLE AND WELL ANCHORED LIFTING MEANS | 9 |
| 20090095466 | Downhole Force Generator - A well tool for applying a pulling or a pushing force to an object in an interior of a well bore comprising: a) an inner member comprising a first elongated member, a second elongated member and an actuation means axially interconnecting the first elongated member and the second elongated member; b) an outer elongated member longitudinally moveably engaged with the inner member; c) a first seal defined between the first elongated member and the outer elongated member, d) a second seal defined between the second elongated member and the outer elongated member; e) a first piston area defined at a first end portion of the outer elongated member between an outer diameter of the outer elongated member and a sealed outer diameter of the first elongated member, f) a second piston area defined at a second end portion of the outer elongated member between the outer diameter of the outer elongated member and a sealed outer diameter of the second elongated member, and g) a sealed chamber defined between the first seal and the second seal, the sealed chamber including a fluid at a fluid pressure; wherein operation of the actuation means axially reversibly moves the outer elongated member relative the inner member while the fluid pressure remains constant; and wherein the first piston area and the second piston area are substantially equal and external pressure acting on these two piston areas, generates two opposing forces substantially balanced during relative movement. | 04-16-2009 |
| 20110186286 | One Trip Retrieval of a Multi-zone Fracturing System - A completion assembly of a top packer and zone isolation packers separated by screens has a disconnect in a selected zone to be fractured or gravel packed that is armed before such a procedure starts. Initially when the assembly of the outer completion and the inner string are properly located and all the screens valved off, all the packers are pressure set and the packer set release device associated with each packer is armed. Before starting a fracturing or gravel packing operation from a given zone isolation packer, a disconnect for that zone packer is armed so that if the inner string sticks in that packer, the inner string is sheared and removed and another trip is used to grab the top packer and pick up. Such picking up releases all the packers down to the one armed disconnect. The disconnect releases bringing up the remnant of the inner string stuck in the packer just above the actuated disconnect. | 08-04-2011 |
| 20120261113 | Cobble/small boulder debris device in borehole excavating - A cobble and small boulder debris removal device including a quiescently open 3 prong claw, and a series of springs and cables within or affixed to a shaft to close the prongs in gripping and holding such cobbles when encountered in the pre-clearance of a borehole, to be then removed by being lifted away and released via a relaxation of a lever connected with a main actuating cable. | 10-18-2012 |
| 20120305235 | Tool for installing units in a well - The present invention relates to a tool for installation of units in connection with oil wells, comprising a housing ( | 12-06-2012 |
| 20140311733 | Overshot - An overshot ( | 10-23-2014 |
| 20150060046 | TOOLS AND METHODS USEFUL WITH WELLBORE REVERSE CIRCULATION - A method for reverse circulating a tool upwardly through a wellbore, the method including: providing a manipulator tool including an upper end and a lower end, conveying the manipulator tool down hole to a position adjacent a downhole tool, using the manipulator tool to manipulate a the downhole tool, and reversing fluid flow through the well to create a pressure differential about at least one of the manipulator tool and the downhole tool such that the at least one of the manipulator tool and the downhole tool is lifted upwardly through the wellbore. A manipulator tool for use in a reverse circulating method is also described as are a tool catcher, a tool catching assembly and a tool catching method. | 03-05-2015 |
| 20150376967 | GRIPPER ASSEMBLY FOR DOWNHOLE TOOLS - A gripper assembly for anchoring a tool within a downhole passage and for possibly assisting movement of the tool within the passage. The gripper assembly includes an elongated mandrel and flexible toes that can be radially displaced to grip onto the surface of the passage. The toes are displaced by the interaction of a driver slidable on the mandrel and a driver interaction element on the toes. In one embodiment, the toes are displaced by the interaction of rollers and ramps that are longitudinally movable with respect to one another. In another embodiment, the toes are displaced by the interaction of toggles that rotate with respect to the toes. | 12-31-2015 |
| 20160024865 | DEVICES AND SYSTEMS FOR EXTRACTING DRILLING EQUIPMENT THROUGH A DRILLSTRING - A device and system for extracting equipment from a drillstring are disclosed. The system comprises an equipment extraction device having an anchor coupled to the equipment, a housing coupled to an uphole portion of the drillstring, and a stator tube coupled to a downhole portion of the drillstring. The anchor is comprised of an anchor extraction pin and at least one anchor claw and the equipment extraction device is detachably coupled to the stator tube. | 01-28-2016 |
| 20160084030 | SAFETY LATCH FOR A DOWNHOLE TOOL - A lockable overshot assembly for use in a wireline spearhead system for lowering and retrieving inner tube assemblies and other tools and equipment from a downhole location includes a pair of lifting dogs pivotally mounted to an overshot head on the lockable overshot assembly and configured for latching a spearhead. A locking arrangement is mounted into the elongated body and engagable within the lifting dogs, such that in a locked state the lifting dogs are in latched position and in an unlocked state, allows the lifting dogs to move to the release position. The locking arrangement is a pin, which can be moved laterally to be between the latching dogs to prevent them moving to the release position. | 03-24-2016 |
