| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 175230000 | WITH EXPANSIBLE BORE WALL ANCHOR (E.G., PACKER) | 7 |
| 20090025983 | Methods and Apparatus to Apply Axial Force to a Packer in a Downhole Tool - Methods and apparatus to apply axial force to a packer in a downhole tool are described. In one described example, an apparatus to apply an axial force to an inflatable packer associated with a downhole tool includes a sleeve slidingly coupled to a body of the downhole tool and an end of the packer. An inner portion of the sleeve is sealed against the body of the downhole tool to form a chamber, and the chamber is fluidly coupled to a pump associated with the downhole tool to receive a pressurized fluid to cause the sleeve to apply an axial force to the packer. | 01-29-2009 |
| 20110198131 | CORE BARREL ASSEMBLIES WITH BRAKING DEVICES - A braking device for drilling operations in a borehole includes a brake retainer having a plurality of brake connector openings defined therein, a body member having a tapered surface having a first diameter and a second diameter, the second diameter being larger than the first diameter, at least one brake element positioned at least partially between the brake retainer and the body member and in communication with the tapered surface and at least one of the brake connector openings, and a bias member configured to exert a biasing force on the body member to move the body member toward the brake retainer to move the brake element from contact with the first diameter of the tapered surface toward contact with the second diameter. | 08-18-2011 |
| 20120012397 | Expandable Tool for an Earth Boring System - In one aspect of the present invention an expandable tool for an earth boring system comprises a mandrel comprising a tubular body and an outer diameter, a plurality of blades disposed about the outer diameter, and a slidable sleeve positioned around the outer diameter and capable of manipulating the plurality of blades into collapsed and expanded positions. | 01-19-2012 |
| 20120012398 | Expandable Tool with at least One Blade that Locks in Place through a Wedging Effect - In one aspect of the present invention, an expandable tool for an earth boring system comprises a mandrel with a sleeve positioned around the outer surface and a blade disposed in a slot formed in the sleeve. The sleeve is also configured to slide along the tubular body. The blade comprises an interior slide groove located on an interior surface and an exterior slide groove located on an exterior surface. A sleeve protrusion is configured to extend into the interior slide groove, while a mandrel protrusion is configured to extend into the exterior slide groove. The blade is configured to shift laterally out of the slot as the sleeve slides axially, wherein the interior and exterior slide grooves are oriented at different angles and as the sleeve slides axially along the length of the mandrel, the slide grooves lock the blade in a pre-determined position through a wedging effect. | 01-19-2012 |
| 20130161100 | INFLATABLE PACKER ELEMENT FOR USE WITH A DRILL BIT SUB - A system for use in a subterranean wellbore includes an earth boring bit on a lower end of a drill string, and an inflatable packer system. The packer system includes a pressure activated inlet valve that regulates pressurized fluid from within the drill string to the packer for inflating the packer. The inlet valve opens above a pressure used for drilling and includes a piston and spring disposed in a cylinder; the spring provides a biasing force against the piston and positions the piston between the annulus and an inlet port to the packer. When inflated, the packer extends radially outward from the drill string and into sealing engagement with an inner surface of the wellbore. | 06-27-2013 |
| 20130161101 | System and Method of Fracturing While Drilling - A system for a drilling and fracturing a wellbore in a single trip includes a drill string, drill bit, and a fluid flow means for delivering fluid through the string and drill bit. The drill bit includes a body with cutting elements, and nozzles between the cutting elements for washing away drilling generated cuttings. A packer on the drill bit selectively seals with an inner surface of the wellbore. Deploying the packer at a designated spot in the wellbore defines a fracturing zone in the wellbore. Closing the nozzles while opening side ports on the body delivers fracturing fluid into the space. A pressurizing system can be included to pressurized the fluid so that pressure in the space overcomes the formation strength and fractures the formation adjacent the enclosed space. The packer can be released, drilling can resume, and fracturing can occur at a different depth in the wellbore. | 06-27-2013 |
| 20160130895 | ROTATIONAL ANCHORING OF DRILL TOOL COMPONENTS - A rotational anchor mechanism is mounted on an operatively nonrotating housing that forms part of a drill string. An anchor linkage forming part of the anchor mechanism is radially extendable and contractible to move an anchor member, such as a roller, mounted on the anchor linkage radially towards and away from the housing, to engage a borehole wall for resisting rotation of the housing relative to drill pipe that is drivingly rotated within the housing. The anchor linkage includes operatively coupled mounting links mounted on the housing to pivot about respective mounting axes which are parallel to one another in a fixed spatial relationship. An actuating mechanism is coupled to the anchor linkage to exert an actuating force on the anchor linkage. An angular orientation of the actuating force relative to the housing varies in response to variation in radial expansion of the anchor linkage. | 05-12-2016 |
