| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 166216000 | With wedge or cam and friction drag | 14 |
| 20090014173 | WELL BORE ANCHORS - A formation engaging member for use in an open hole anchor ( | 01-15-2009 |
| 20090126926 | Torque anchor - The invention describes a torque anchor for use with progressive cavity pumps (PC Pumps) for preventing rotation of the PC Pumps and any related tool string and tubing within a wellbore. The torque anchor includes at least one fixed rigid slip and one pivotable slip that in combination enhance the ability of the torque anchor to remain centered within wellbore casing and provide space between the torque anchor and wellbore casing for other tubing and/or other cabling or instruments to be run within the well and/or facilitate the passage of sand and other substances indigenous to many well formations past the torque anchor. | 05-21-2009 |
| 20090159269 | Self-Anchoring Device with Force Amplification - A downhole tool is provided that includes a grip assembly for contacting a well formation. The grip assembly includes a gripper body; and a centralizer that is attached to and radially expandable with respect to the gripper body and that has a geometry which is lockable by a locking device. The grip assembly also includes a force amplifier in force transmitting relation with the centralizer, wherein the force amplifier transfers a force in a first direction to a much larger force in a second direction when the centralizer is locked by the locking device. | 06-25-2009 |
| 20100101779 | MULTIPLE-BLOCK DOWNHOLE ANCHORS AND ANCHOR ASSEMBLIES - Multiple-block downhole anchors and anchor assemblies are provided. A downhole anchor assembly for a tubing string includes an anchor block, a drag block, a biasing arrangement, and a mandrel to be coupled to the tubing string. The anchor block moves, with rotation of the mandrel, between a run position out of contact with a well bore and a set position in contact with the well bore to set the downhole anchor assembly in the well bore. The drag block contacts the well bore at least when the anchor block is out of contact with the well bore. The biasing arrangement biases the anchor block away from the well bore and the drag block toward the well bore. The anchor block is thus protected from the well bore by the drag block, and the biasing arrangement provides for automatic un-setting of the anchor block when torque is removed from the mandrel. | 04-29-2010 |
| 20110011578 | Expansion System for Expandable Tubulars - Methods and apparatus for radially expanding and plastically deforming an expandable tubular member using a lower expansion cone and an upper expandable cone. The apparatus includes an expandable tubular, a support member releasably secured to the expandable tubular, and an extendable section below where the support member is releasably anchored. An upper expandable cone is attached to the extendable section and in a retracted state and an anchor is disposed below the upper expandable cone. The anchor is releasable from below the upper expandable cone. A lower expansion cone is disposed below the anchor. An expansion sleeve is disposed in the lower end of the expandable tubular. The lower expansion cone is configured to expand the expansion sleeve radially outward to an outer diameter greater than the inside diameter of the expandable tubular when axially displaced downward by the extendable section. | 01-20-2011 |
| 20110220346 | Downhole Actuator - An actuator for connecting to and displacing of a component in a well tubular is disclosed. The actuator includes a tool shaft provided with a radial direction spring-loaded gripping device which are complementary fitting in the component. | 09-15-2011 |
| 20120012306 | RETRIEVABLE SLIP MECHANISM FOR DOWNHOLE TOOL - A downhole tool slip mechanism including a cone, cage, and slip disposed on a mandrel. The cone and cage can be move in relation to one another, and the come may be locked into place during run-in and retrieval downhole. The cage contains slip slots contains a spring retaining finger for a spring that resides between the retention finger and the slip. This spring serves to bias the slip inward during run-in and retrieval. The slip slots have load-bearing shoulders used to engage the slip during retrieval. The slips outer surface is completely covered in wickers so that the slip can sustain greater loads when set in place. Additionally, the slip has load-bearing shoulders with an increased thickness cross-section to sustain greater loads during retrieval while minimizing slip and cage failures. | 01-19-2012 |
| 20120090832 | Downhole Actuator - An actuator for connecting to and displacing of a component in a well tubular is disclosed. The actuator includes a tool shaft provided with a radial direction spring-loaded gripping device which are complementary fitting in the component. | 04-19-2012 |
| 20120152526 | SYSTEM AND METHOD FOR ANCHORING AN EXPANDABLE TUBULAR TO A BOREHOLE WALL - The present invention provides a system for anchoring an expandable tubular to a borehole wall. The system comprises a support member having a first end fixed relative to the outside of the tubular and a second end comprising a ramping surface. An anchor member has a first end fixed relative to the outside of the tubular and a second end extending toward the support member, said second end being movable relative to the outside of the tubular. Said support member includes a ramp surface that tapers in the direction of said anchor member. Expansion of the portion of the expandable tubular between the first support end and the first anchor end causes the axial device length to shorten, wherein the difference in length is sufficient to cause the second anchor end to move radially outward and engage the borehole wall as a result of engagement with said ramping surface. | 06-21-2012 |
| 20120186804 | Tapered Dog Configuration to Share Stress in a Housing of a Subterranean Tool - A plurality of rows of locking dogs are provided with housing flexibility between rows to allow them to share a shear loading while leaving enough structural integrity in the housing to define the windows through which the dogs emerge. The dogs can also have extensions with a surface that grippingly engages the housing adjacent the window on extension of the dogs such that loads can transfer from the housing into the extension and into the profile in which the dog is disposed rather than passing the shear stress through the window edge into the dog that is in the profile. The dog configuration can also share the load on multiple contact surfaces of the housing to reduce stress at each contact location. | 07-26-2012 |
| 20140262214 | Bonded Segmented Slips - A slip assembly for a downhole tool, such as a bridge plug, has a slip body composed of independent segments. The segments are affixed together along their longitudinal sides by a bond, which can be composed of thermoplastic or thermoset resins, an elastomer, epoxy adhesives, bonding agent manufactured using ceramic, metallic agent, or a combination of these. The surface area over which the bonding agent is applied can be controlled for a particular implementation. Thus, more or less of the longitudinal sides of the segments can be bonded to other segments. This provides greater control of the required force to break the bond itself, which can be tailored as desired. | 09-18-2014 |
| 20140338892 | Slip with Altering Load Distribution Feature - A liner hanger has slips held by a slip body. A potential energy force to move the slips axially when the hanger is in position is selectively released. The nature of the loading between the slips and the casing changes from a radial reaction force from the casing going into the slip and then distributed circumferentially to the slip housing to an essentially axial loading of the slip housing down onto the slip that has penetrated the casing with an opposite reaction force in the casing wall. The contact location between the slip housing and the slip is made broader at the slip end with a wider portion having an undercut to reduce contact stress and to aid in promoting flow past the set slip. The slip housing also has axial flow channels that interact with the undercut to promote flow past the set slips. | 11-20-2014 |
| 20150090441 | ANCHOR MECHANISM FOR USE IN A WELL - An anchor mechanism for use in a well including a housing with a plurality of openings evenly distributed along the circumference of the housing and each opening arranged to narrowly house a radially movably slip including first and second end portions, a gripping side facing a well wall, the gripping side being provided with a plurality of teeth, an underside facing the opposite direction, two side faces extending from the gripping side to the underside and to two end faces; the slip having, at its first and second end portions, with a first inclined face and a second inclined face substantially sloping from the end faces and towards the middle portion of the slip on the underside; the slip provided, on its end faces, with laterally projecting tongues having a longitudinal direction parallel to the inclined faces; the slip provided, on its two side faces, with guide portions exhibiting a longitudinal direction perpendicular to the longitudinal direction of the slip and the guide portion complementarily fitting an inward-facing guide in the housing; the anchor mechanism provided with first and second axially movable slip cones being surrounded in a portion of the housing; the slip cones having inclined faces in their position of application arranged to rest against the inclined faces of the slip, the slip cones provided with a plurality of grooves, each groove being arranged to house one tongue, and the housing being constituted by a first housing half and a second housing half. | 04-02-2015 |
| 20150292284 | Slip Release Assembly with Cone Undermining Feature - A slip release mechanism provides for undermining the slip cone in the set position of the slips so that the grip of the slips can be released subsequent to allowing the cone ramp to flex. The slips can be pulled back down the cone ramp as the completion of the same motion that undermines the support for the cone. | 10-15-2015 |
