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| Number | Title | Issue Date |
| 8006785 | Casing and liner drilling bits and reamers A casing bit, which may comprise a composite structure, for drilling a casing section into a subterranean formation, and which may include a portion configured to be drilled therethrough, is disclosed. Cutting elements and methods of use are disclosed. Adhesive, sol... | 08/30/2011 |
| 7896110 | Shoe A tubing shoe (10) for use on work strings in well bores as are typically utilised in oil and gas production. The shoe comprises a cylindrical body (12) upon which is arranged a reaming portion (22) including pairs of teardrop shaped raised ream... | 03/01/2011 |
| 7484578 | Hole coring system An apparatus for drilling holes in a substrate wherein a mandrel is anchored to the substrate. A hollow drill bit rotates about the mandrel via a drive motor and is a guided along a length of the mandrel. ... | 02/03/2009 |
| 7413020 | Full bore lined wellbores Embodiments of the present invention generally provide methods and apparatus for forming a tubular-lined wellbore which does not decrease in diameter with increasing depth or length. Methods and apparatus for forming a substantially monobore well while drilling with... | 08/19/2008 |
| 7395882 | Casing and liner drilling bits A casing bit, which may comprise a composite structure, for drilling a casing section into a subterranean formation, and which may include a portion configured to be drilled therethrough, is disclosed. Cutting elements and methods of use are disclosed. Adhesive, sol... | 07/08/2008 |
| 7275605 | Rotatable drill shoe A rotatable drilling shoe attachable to a section of casing that allows for drilling and casing of a well bore in a single trip. The drilling shoe includes a fixed section and a rotatable section that has a drillable bit attached thereto. The drilling shoe further i... | 10/02/2007 |
| 7216727 | Drilling bit for drilling while running casing A drill bit for drilling casing in a well bore. The drill bit is constructed from a combination of relatively soft and relatively hard materials. The proportions of the materials are selected such that the drill bit provides suitable cutting and boring of the well b... | 05/15/2007 |
| 7169239 | Solid expandable tubular members formed from very low carbon steel and method A very low carbon steel alloy is provided for use in manufacturing tubular members such as oil country tubular goods. The tubular members may be radially expanded from at least twenty percent to forty percent. Sections or joints of casing formed from the steel alloy... | 01/30/2007 |
| 7165634 | Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are des... | 01/23/2007 |
| 7147068 | Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are des... | 12/12/2006 |
| 7131506 | Flightless rock auger for use with pressure drills with quick attachment and method of use A flightless rock auger is used for drilling postholes through rock with the use of hydraulic pressure and at slow revolution per minute. The rock auger is used in combination with a conventional flighted auger used for drilling postholes in dirt and clay. During a ... | 11/07/2006 |
| 7100713 | Expandable apparatus for drift and reaming borehole An expandable reamer shoe is provided for use with expandable casing in a borehole. The reamer shoe has a number of reaming members in the form of blades which remain closed against the body of the shoe when inserted through casing, and can then be expanded to under... | 09/05/2006 |
| 7096982 | Drill shoe A method and apparatus for a drilling with casing includes therewith a drill shoe configured for later drilling through thereof in situ, with cutters retainable thereon in response to the forces encountered during borehole drilling, yet moveable from the envelope th... | 08/29/2006 |
| 7066253 | Casing shoe A shoe for guiding a string within a well-bore comprises an annular body of relatively hard material and a nose portion of relatively soft material which are interlocked so that when the nose portion is drilled through, any remaining parts are held against the annul... | 06/27/2006 |
| 7048050 | Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells The steel drill string attached to a drilling bit during typical rotary drilling operations used to drill oil and gas wells is used for a second purpose as the casing that is cemented in place during typical oil and gas well completions. Methods of operation are des... | 05/23/2006 |
| 7036610 | Apparatus and method for completing oil and gas wells A method of drilling and completing a wellbore in a geological formation to produce hydrocarbons from a well comprising at least the following four steps: drilling the well with a retrievable drill bit attached to a casing; removing the retrievable drill bit from th... | 05/02/2006 |
| 6983811 | Reamer shoe A reamer shoe (1) for mounting on a tubing string has a reaming area (5) supporting a plurality of discrete reaming members (6) typically formed as simple geometrical shapes. The reaming members provide complete circumferential coverage of the s... | 01/10/2006 |
| 6945339 | Core drill A plurality of chip evacuating grooves (16, 26, 36, 46a, 46b) in a vertical direction in parallel with a rotational axis of a core main body (14) are formed at an outer peripheral face of the core main body (14) in a circumf... | 09/20/2005 |
| 6702045 | Drilling apparatus There is provided drilling apparatus (10) comprising a hammer casing (11), a free piston motor piston guide and porting sleeve (12), a drive sub (13), a drill bit (15) splined by shank (16) to the drive sub (13). Below the splined portion (17) the drive s... | 03/09/2004 |
| 6675919 | Tubular piling apparatus and method A tubular piling apparatus and method for penetrating the soil comprises, in a preferred embodiment, elements such as a drive shoe and/or other earth displacing structures which may be, in one presently preferred embodiment, of larger outer diameter than ... | 01/13/2004 |
| 6659173 | Downhole tool A tubing shoe (30) comprising: a body (32) for mounting on the end of a tubing string; and reaming members (36) extending longitudinally and helically around the body, the reaming members providing substantially complete circumferential coverage of the bo... | 12/09/2003 |
| 6619413 | Flightless rock auger for use with pressure drills with quick attachment and method of use A flightless rock auger is used for drilling postholes through rock with the use of hydraulic pressure and at slow revolution per minute. The rock auger is used in combination with a conventional flighted auger used for drilling postholes in dirt and clay... | 09/16/2003 |
| 6494276 | Rock auger with pilot drill A rock auger for drilling postholes through rock without the use of hydraulic pressure and at a slow rate of revolutions per minute can function utilizing only the weight of the auger, shaft, and/or boom providing a floating auger to reduce shock and vibr... | 12/17/2002 |
| 6443247 | Casing drilling shoe A casing drilling shoe adapted for attachment to a casing string and comprising an outer drilling section constructed of a relatively hard material such as steel and an inner section constructed of a readily drillable material such as aluminum. The drilli... | 09/03/2002 |
| 6401820 | Downhole tool A tubing shoe (30) comprising: a body (32) for mounting on the end of a tubing string; and reaming members (36) extending longitudinally and helically around the body, the reaming members providing substantially complete circumferential coverage of the bo... | 06/11/2002 |
| 6223838 | Auger system An auger system for removing material from around an object without damaging the object. The inventive device includes a tubular auger attachable to a drive unit, and an insert member insertable within the upper opening of the valve casing. The tubular au... | 05/01/2001 |
| 6129163 | Flightless rock auger with quick attachment and method of use A flightless rock auger For drilling postholes through rock without the use of hydraulic pressure. The rock auger has a plurality of teeth extending downwardly at a selected angle from the edge of a cylinder connected to a quick connect shaft. The rock au... | 10/10/2000 |
| 6062326 | Casing shoe with cutting means A casing shoe (30) for use in guiding a casing into a wellbore comprises a generally cylindrical body (2) having a box portion (34) at its rearward end for connection to a casing string and having a generally rounded nose portion (36) at its forward end. ... | 05/16/2000 |
| 5127482 | Expandable milling head for gas well drilling A tool head is separably attached to the end of a hollow well drilling string for cutting operations within a well and for detachment of the cutting head from the string without removing the string from the well. The head is attached by a ball clutch stru... | 07/07/1992 |
| 5050679 | Method of sealing contaminated wells A method for sealing a well to prevent ground water contamination in which the existing perforate casing is at least temporarily intermally capped. Thereafter, a new imporforate casing is palaced about a portion of the length of the existing casing extend... | 09/24/1991 |
| 4979848 | Drilling device A process for protecting nonstable or moderately stable, cohesionless to slightly cohesive geologic formations, in particular, in tunnel construction, in which drill holes are first made by boring into the formation and, following completion of the boring... | 12/25/1990 |
| 4932129 | Casing punch for wells A metal punch is formed of a cylindrical body member having an outer cylindrical surface and a forward workpiece engaging end; an axial bore extends rearwardly from the forward end with the workpiece engaging portion of the being defined from front to rea... | 06/12/1990 |
| 4924951 | Manhole cutter Manhole cutter for cutting a circular groove of a fixed depth about a manhole, such as in a street, and removing the manhole from the street. The manhole cutter is suspended from a front-end loader or truck-mounted boom and rotated hydraulically from a po... | 05/15/1990 |
| 4715455 | Drill shoe A drill shoe adapted to fit onto a drill pipe of external diameter de and internal diameter di comprises an externally stepped cutting surface comprising a plurality of steps, the diameters of the steps increasing as they progress aw... | 12/29/1987 |
| 4657441 | Penetration conductor pipe drive shoe An improved drive shoe is shown for installation on the penetrating end of a string of conductor pipe, for improving driving penetration through soil. The improved shoe has a reinforced cylindrical driving section. A symmetrical, toothed beveled penetrati... | 04/14/1987 |
| 4534773 | Abrasive product and method for manufacturing An abrasive body is provided which has high strength and an ability to withstand high temperatures making it suitable as a tool insert for dressing tools and surface set drill bits. The body comprises a mass of diamond particles present in an amount of 80... | 08/13/1985 |
| 4362217 | Downhole shearers The present specification describes and claims a downhole casing shearer for use in drilling bore holes. The casing shearer comprises an elongate, generally cylindrical sub-member which is connected between a drilling bit and a drill rod string and which ... | 12/07/1982 |
| 4276942 | Deviation device A deivation device for causing a conductor string to deviate as it is being driven into a subterranean formation. The deviation device comprises a straight tubular element, open at both ends, wherein the wall of the tubular element at an end part is provided ... | 07/07/1981 |
| 4266621 | Well casing window mill A diamond milling cutter for elongating a laterally opening window in a well casing set in a well bore extending into the earth. The mill has a revolving surface which engages a sidetracking whipstock or the edge of the casing being milled to urge the mil... | 05/12/1981 |
| 4189015 | Drill bits for obtaining core samples A drill bit used for obtaining core samples in concrete or rock formations. The drill bit comprises a cylindrical body having a generally annular-shaped cutting surface at one end and at least one waterway including an inner channel on the interior surfac... | 02/19/1980 |
