Class 175/98 - Expansible anchor

Subclass of Class 175 - Boring or penetrating the earth
Definition: Apparatus in which said means may be selectively expanded
No. of patents: 23
Last issue date: 10/04/2011

Number	Title	Issue Date
8028766	Electrically powered tractor An electrically powered and controlled tractor system includes one or more electric gripper assemblies and one or more electric power train assemblies. Power and control signals for the gripper assemblies and power train assemblies can be delivered from a ground sur...	10/04/2011
7770667	Electrically powered tractor An electrically powered and controlled tractor system includes one or more electric gripper assemblies and one or more electric power train assemblies. Power and control signals for the gripper assemblies and power train assemblies can be delivered from a ground sur...	08/10/2010
7392859	Roller link toggle gripper and downhole tractor An expandable gripper assembly may be configured for anchoring a tool in a passage. The expandable gripper assembly includes first, second, and third pivotally connected links that are coupled to a tool. The third link is adapted to engage an inner wall in the passa...	07/01/2008
7353886	Tractor with improved valve system A hydraulically powered tractor includes an elongated body, two gripper assemblies, at least one pair of aft and forward propulsion cylinders and pistons, and a valve system. The valve system comprises an inlet control valve, a two-position propulsion control valve,...	04/08/2008
7287608	Method and device for drilling a hole in soil or rock material and for forming an anchoring A method and device for boring a hole in soil or rock material and for forming an anchoring are disclosed. A borehole is formed by inserting a drill bit, and tensioning elements coupled to the drill bit are introduced into the borehole. After completion, the boring ...	10/30/2007
7234539	Method and apparatus for rescaling measurements while drilling in different environments A method and apparatus are provided for determining an orientation of a drilling tool of a drilling system configured to drill a borehole into the Earth's surface. The method includes providing a survey system including at least one sensor within the drilling system...	06/26/2007
7204324	Rotating systems associated with drill pipe Methods and apparatuses for drilling a borehole are disclosed. An electric motor electrically and mechanically coupled to a wired drill pipe is provided. The electric motor couples to a shaft that rotates when power is supplied to the electric motor. The shaft is co...	04/17/2007
7188681	Tractor with improved valve system A hydraulically powered tractor includes an elongated body, two gripper assemblies, at least one pair of aft and forward propulsion cylinders and pistons, and a valve system. The valve system comprises an inlet control valve, a two-position propulsion control valve,...	03/13/2007
7121364	Tractor with improved valve system A hydraulically powered tractor adapted for advancement through a borehole including an elongate body, aft and forward gripper assemblies, and a valve control assembly housed within the elongate body. The aft and forward gripper assemblies are adapted for selective ...	10/17/2006
7080700	Tractor with improved valve system A hydraulically powered tractor includes an elongated body, two gripper assemblies, at least one pair of aft and forward propulsion cylinders and pistons, and a valve system. The valve system comprises an inlet control valve, a two-position propulsion control valve,...	07/25/2006
6955232	Equipment for drilling vertical boreholes The invention relates to equipment for drilling a vertical borehole in hard ground, the equipment comprising: casing put successively into place in the borehole; a drilling machine having a rotary cutting head and ...	10/18/2005
6839988	Drilling apparatus for hard ground An apparatus for drilling trenches in the ground comprising a main frame having two vertical main faces, a drilling assembly comprising a support disposed at the bottom of said frame, means for causing said drilling assembly to move in vertical translation relative ...	01/11/2005
6793444	Mechanical anchor A mechanical anchor includes an anchor unit that is divided into a plurality of divided anchor units which are movably connected to a tension rod to be moved in lateral directions. The anchor unit is opened or closed by the movement of the divided anchor units, and ...	09/21/2004
6679341	Tractor with improved valve system A hydraulically powered tractor includes an elongated body, two gripper assemblies, at least one pair of aft and forward propulsion cylinders and pistons, and a valve system. The valve system comprises an inlet control valve, a two-position propulsion con...	01/20/2004
6478097	Electrically sequenced tractor A downhole drilling tractor for moving within a borehole comprises a tractor body, two packerfeet, two aft propulsion cylinders, and two forward propulsion cylinders. The body comprises aft and forward shafts and a central control assembly. The packerfeet...	11/12/2002
6467557	Long reach rotary drilling assembly A long reach rotary drilling assembly comprises an elongated conduit extending through a bore in an underground formation, a drill bit for being rotated to drill the bore, a 3-D steering tool on the conduit for steering the drill bit, and a tractor on the...	10/22/2002
6431270	Downhole tools with a mobility device The present invention provides a system for performing a desired operation in a wellbore. The system contains a downhole tool which includes a mobility platform that is electrically operated to move the downhole tool in the wellbore and an end work device...	08/13/2002
6347674	Electrically sequenced tractor A downhole drilling tractor for moving within a borehole comprises a tractor body, two packerfeet, two aft propulsion cylinders, and two forward propulsion cylinders. The body comprises aft and forward shafts and a central control assembly. The packerfeet...	02/19/2002
6210077	Mechanical ground anchor A mechanical ground anchor is provided including an anchor body having a plurality of parts forming a cylindrical shape. The parts forming the cylindrical shape are mounted to be opened and closed in the horizontal direction by a slide mechanism and a dri...	04/03/2001
6142245	Extended reach drilling system An extended reach drilling (ERD) system for drilling a borehole in an underground formation is provided. The ERD system comprises a drill bit, a motor for driving the drill bit, a drill-pipe to surface, a hydraulic cylinder/piston arrangement for providin...	11/07/2000
6112809	Downhole tools with a mobility device The present invention provides a system for performing a desired operation in a wellbore. The system contains a downhole tool which includes a mobility platform that is electrically operated to move the downhole tool in the wellbore and an end work device...	09/05/2000
4986374	Apparatus for driving an upwardly directed shaft in rock An apparatus for driving an upwardly directed shaft in rock, which includes a platform that can be regulated in height. The platform carries a drilling unit having engageable elements enabling fixation of the drilling unit relative the wall of the shaft. ...	01/22/1991
4099584	Flame jet tool for drilling to great depths A flame jet tool for drilling a hole in the ground at great depths is disclosed. The tool comprises a flame jet lance having a drill bit and an associated fuel system. The lance is disposed in a guide sheath such that the lance may be raised and lowered t...	07/11/1978

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Class 175/98 - Expansible anchor