| Patent Number |
Title Of Patent |
Date Issued |
| T970002 |
Cutting elements for drill bits |
May 2, 1978 |
| a cutting element for mounting in a rolling cone cutter of a rock drill bit has a notch in the periphery of its base for improved retention of the cutting element in the rolling cone cutter. The longitudinal axis of the notch is essentially transverse to the direction of insertion of the |
| T969007 |
Method for making rock bits |
April 4, 1978 |
| a method of making a rock bit which is a welded assembly of legs each carrying a rotatable cutter. Electrochemical grinding is used for finish machining of mating surfaces of heat-treated bit legs, and the legs are secured together by electron-beam welding along the mating surfaces. |
| RE37006 |
High flow weld-in nozzle sleeve for rock bits |
January 2, 2001 |
| A nozzle sleeve for the retention of replaceable fluid nozzles for rock bits is disclosed. The sleeve is secured within the body of the rock bit. A first upstream end of the sleeve communicates with a fluid plenum formed by the bit body. A second downstream end of this sleeve is adapted |
| RE36848 |
Air percussion drilling assembly |
September 5, 2000 |
| An air percussion hammer drill is disclosed for operation in an earthen formation. The air compression hammer mechanism comprises a piston that reciprocates while simultaneously rotating within its housing. A hammer drill bit slidably keyed to the bottom of the piston transfers the impac |
| RE36452 |
Composite seal for rotary cone rock bits |
December 21, 1999 |
| An elastomeric o-ring rock bit seal is disclosed with two or more integrally bonded elastomers or phenolic type materials joined together to form the seal. The dynamic sealing face adjacent the journal bearing is fabricated from an elastomer/phenolic engineered specifically for wear |
| RE36166 |
Air percussion drilling assembly for directional drilling applications |
March 30, 1999 |
| An air percussion hammer drill is disclosed for operation in an earthen formation. The air compression hammer mechanism comprises a piston that reciprocates while simultaneously rotating within its housing. A hammer drill bit slidably keyed to the bottom of the piston transfers the impac |
| RE33751 |
System and method for controlled directional drilling |
November 26, 1991 |
| A system and method for controlled directional drilling utilizes a system approach to design the hardware for drilling according to the well plan. The bend angle of a bent housing, connected between the bit and downhole motor, the diameter of a plurality of stabilizers and placement of t |
| RE32495 |
Chip relief for rock bits |
September 8, 1987 |
| This invention relates to roller cone, air circulation type rock bits. Means are provided on the rock bit body as well as on the shirttail portion of each of the legs extending from the body to provide a relief to pass rock chips from the borehole bottom and up the drill string as the |
| H1566 |
Matrix diamond drag bit with PCD cylindrical cutters |
August 6, 1996 |
| A drag bit mold fabricated from high temperature resisting material is machined to accept cylindrically shaped polycrystalline diamond cutters (PCD) having tungsten carbide bodies. Each of the multiple PCD matrix pockets in the mold is formed by two independent non-parallel end mill |
| 7617049 |
Distance determination from a magnetically patterned target well |
November 10, 2009 |
| Methods for determining the distance and relative axial position between twin and target wells are disclosed. In one exemplary embodiment the magnitude and direction of the interference magnetic field vector are processed to determine the distance and the axial position. In another e |
| 7616734 |
Multi-step method of nondestructively measuring a region within an ultra-hard polycrystalline co |
November 10, 2009 |
| A method for nondestructively obtaining measurement information of a region within one or more ultra-hard polycrystalline constructions comprises conducing a first measurement using x-ray fluorescence by directing x-rays onto a surface of the diamond body, receiving x-ray fluorescenc |
| 7615712 |
Integrated circuit packages including damming and change protection cover for harsh environments |
November 10, 2009 |
| An electronic assembly for use in a downhole tool includes a damming boot deployed about at least one integrated circuit component on a circuit board. The boot is disposed to house the integrated circuit leads and solder joints in a substantially sealed cavity between the circuit board, |
| 7608333 |
Thermally stable diamond polycrystalline diamond constructions |
October 27, 2009 |
| Thermally stable diamond constructions comprise a diamond body having a plurality of bonded diamond crystals, a plurality of interstitial regions disposed among the crystals, and a substrate attached to the body. The body includes a working surface and a side surface extending away from |
| 7604074 |
Cutting elements and bits incorporating the same |
October 20, 2009 |
| A cutting element is provided including a substrate having a periphery and an interface surface. An ultra hard material layer is formed over the substrate and interfaces with the interface surface. The interface surface also includes a plurality of spaced apart projections formed inw |
| 7597158 |
Drilling and hole enlargement device |
October 6, 2009 |
| An expandable drilling apparatus is deployed upon a distal end of a drillstring and includes a cutting head and a substantially tubular main body adjacent the cutting head providing a plurality of axial recesses configured to receive arm assemblies configured to translate between a r |
| 7588086 |
Ported velocity tube for gas lift operations |
September 15, 2009 |
| A gas lift apparatus for use with a well bore sealing device includes a tubing string coupled to the well bore sealing device, a gas inlet port in the tubing string extending between the well bore above the sealing device and a flow bore in the tubing string to provide a first flow path, |
| 7587936 |
Apparatus and method for determining drilling fluid acoustic properties |
September 15, 2009 |
| Aspects of this invention include a downhole tool having first and second radially offset ultrasonic standoff sensors and a controller including instructions to determine at least one of a drilling fluid acoustic velocity and a drilling fluid attenuation coefficient from the reflected |
| 7584788 |
Control method for downhole steering tool |
September 8, 2009 |
| A method for determining a rate of change of longitudinal direction of a subterranean borehole includes positioning a downhole tool in a borehole, the tool including first and second longitudinally spaced surveying devices disposed thereon. The method further includes causing the sur |
| 7571778 |
Method of drilling a bore hole |
August 11, 2009 |
| A method to drill a borehole includes drilling the borehole through an overburden with a drill bit selected to optimize a drilling performance parameter and drilling the borehole through a production zone with another drill bit selected to optimize a production performance parameter. |
| 7571083 |
Method of designing a drill bit, and bits made using said method |
August 4, 2009 |
| A method for designing a drill bit that involves simulating a drill bit having cutting elements disposed thereon is provided. In particular, the method involves determining at least one drilling performance parameter while simulating drilling in a selected earth formation. |
| 7558675 |
Probablistic imaging with azimuthally sensitive MWD/LWD sensors |
July 7, 2009 |
| A method for forming a borehole image of an azimuthally sensitive borehole or formation parameter is disclosed. Such a borehole image may be formed, for example, by processing logging sensor data with a predetermined sensor response function (also referred to herein as a probability |
| 7558369 |
Nondestructive method of measuring a region within an ultra-hard polycrystalline construction |
July 7, 2009 |
| Methods for nondestructively measuring a characteristic within an ultra-hard polycrystalline construction comprises projecting a beam of energy from an emitter onto the construction. The energy is directed to a target region within the ultra-hard polycrystalline construction and pass |
| 7557582 |
Logging while drilling tool for obtaining azimuthally sensitive formation resistivity measuremen |
July 7, 2009 |
| An apparatus for making azimuthally sensitive resistivity measurements of a subterranean formation is disclosed. The apparatus includes a magnetically permeably ring deployed about an electrically conductive tool body. An AC voltage supply is coupled to the tool body on opposing side |
| 7552783 |
Graded hardfacing for drill bits |
June 30, 2009 |
| A drill bit including a bit body having an upper end adapted to be detachably secured to a drill string and at least one leg at its lower end, each leg having a downwardly and inwardly extending journal bearing, at least one roller cone mounted on each journal bearing, at least one c |
| 7549912 |
Method of finishing cutting elements |
June 23, 2009 |
| A method for manufacturing drill bit inserts in which the inserts are finished in a centrifugal disc finishing machine. The centrifugal disc finishing machine comprises a configured surface rotating relative to a stationary receptacle, and the inserts may be finished with a mass of m |
| 7549490 |
Arrangement of roller cone inserts |
June 23, 2009 |
| A drill bit having cutting elements disposed on a roller cone surface in a non-linear pattern, wherein at least one of the cutting elements is asymmetrical to its axis of orientation. Also, a method for selecting and adjusting a cutting element orientation based on crater profile geometr |
| 7549488 |
Two-cone drill bit with enhanced stability |
June 23, 2009 |
| A two-cone drill bit that exhibits improved stability. In one embodiment, the two-cone drill bit has a first and a second roller cone arranged to have a cone separation angle between about 145 degrees and about 166 degrees. In some embodiments, the two-cone drill bit has a plurality of |
| 7543662 |
Stress-relieved diamond inserts |
June 9, 2009 |
| A drill bit including at least one stress-relieved cutting element, wherein the at least one cutting element is mounted on the drill bit, wherein the stress-relieved cutting element includes a substrate, at least one transition layer disposed upon the substrate and a polycrystalline |
| 7543661 |
Roller cone bits with wear and fracture resistant surface |
June 9, 2009 |
| Roller cone bits of this invention include a steel bit body having at least one leg extending therefrom. A steel cone is rotatably disposed on the leg. The steel cone includes a plurality of steel cutting elements that each project outwardly a distance therefrom. At least one of the |
| 7540340 |
Cutting element having enhanced cutting geometry |
June 2, 2009 |
| A drill bit having a bit body, at least one roller cone attached to the bit body and able to rotate with respect to the bit body, and a plurality of cutting elements disposed on the at least one roller cone is disclosed. At least one of the plurality of cutting elements includes a fi |
| 7538650 |
Apparatus and method for magnetizing casing string tubulars |
May 26, 2009 |
| An apparatus for magnetizing a wellbore tubular includes a plurality of co-axial magnetizing coils deployed on a frame. The coils are typically deployed about a track on which the tubular may be traversed. Exemplary embodiments may further include a magnetic field sensor disposed to |
| 7533740 |
Thermally stable polycrystalline diamond cutting elements and bits incorporating the same |
May 19, 2009 |
| Cutting elements are provided having substrates including end surfaces. TSP material layers extend over only a portion of the end surfaces or extend into the substrates below the end surfaces. Bits incorporating such cutting elements are also provided. |
| 7533732 |
Dual entry apparatus for a subterranean borehole |
May 19, 2009 |
| A borehole entry apparatus is disclosed. The apparatus includes a dual entry apparatus for use in borehole entry applications, such as slick line and/or wireline (electric wireline) applications. Exemplary embodiments of this invention enable first and second borehole entry apparatus |
| 7518949 |
Shear wave velocity determination using evanescent shear wave arrivals |
April 14, 2009 |
| A method for determining a shear wave velocity of a subterranean formation from a leaky shear wave arrival is disclosed. Standoff measurements are utilized to indicate the presence of leaky shear wave arrivals in the received waveforms. In one exemplary embodiment, leaky shear waves are |
| 7517589 |
Thermally stable diamond polycrystalline diamond constructions |
April 14, 2009 |
| Thermally stable diamond constructions comprise a diamond body having a plurality of bonded diamond crystals and interstitial regions disposed among the crystals. A metallic substrate is attached to the body. The body includes a first region substantially free of a catalyst material |
| 7517202 |
Multiple elastomer layer progressing cavity stators |
April 14, 2009 |
| A progressing cavity stator and a method for fabricating such a stator are disclosed. The progressing cavity stator includes first and second elastomer layers fabricated from corresponding first and second elastomer materials. The first and second elastomer materials are selected to have |
| 7513318 |
Steerable underreamer/stabilizer assembly and method |
April 7, 2009 |
| A bottom hole assembly includes a drill bit, a stabilized underreamer assembly located behind the drill bit, and a drilling assembly. A method to drill a formation includes positioning a stabilized underreamer assembly behind a drill bit, positioning a drilling assembly behind the st |
| 7506704 |
Downhole swivel joint |
March 24, 2009 |
| A downhole releasable swivel joint comprises a mandrel and a housing. A resilently deformable retaining device maintains the components in the illustrated first relative axial position until downward movement of the housing is stopped and a sufficient load is applied to the mandrel to |
| 7506703 |
Drilling and hole enlargement device |
March 24, 2009 |
| An expandable drilling apparatus is deployed upon a distal end of a drillstring and includes a cutting head and a substantially tubular main body adjacent the cutting head providing a plurality of axial recesses configured to receive arm assemblies configured to translate between a r |
| 7506698 |
Cutting elements and bits incorporating the same |
March 24, 2009 |
| Cutting elements and bits incorporating such cutting elements are provided. The cutting elements have a substrate, a first ultra hard material layer formed over the substrate, and a second ultra hard material layer formed over the first ultra hard material layer. The second ultra har |
| 7493973 |
Polycrystalline diamond materials having improved abrasion resistance, thermal stability and imp |
February 24, 2009 |
| PCD materials comprise a diamond body having bonded diamond crystals and interstitial regions disposed among the crystals. The diamond body is formed from diamond grains and a catalyst material at high pressure/high temperature conditions. The diamond grains have an average particle size |
| 7493971 |
Concentric expandable reamer and method |
February 24, 2009 |
| An expandable downhole tool comprises a tubular body, at least one moveable arm disposed within the tubular body and being radially translatable between a retracted position and a wellbore engaging position, and at least one piston operable to mechanically support the at least one mo |
| 7481461 |
Device which is expandable to engage the interior of a tube |
January 27, 2009 |
| A device which is expandable to engage the interior of a tube, for example the casing of an oil well, comprises first and second tubular members in partial telescopic engagement with each other, the first tubular member having an end region which is received on the second tubular member |
| 7475743 |
High-strength, high-toughness matrix bit bodies |
January 13, 2009 |
| A drill bit that includes a bit body formed from a matrix powder and at least one cutting element for engaging a formation, wherein the matrix powder included (a) stoichiometric tungsten carbide particles, (b) cemented tungsten carbide particles, and (c) cast tungsten carbide particl |
| 7473287 |
Thermally-stable polycrystalline diamond materials and compacts |
January 6, 2009 |
| Thermally-stable polycrystalline diamond materials of this invention comprise a first phase including a plurality of bonded together diamond crystals, and a second phase including a reaction product formed between a binder/catalyst material and a material reactive with the binder/cat |
| 7470341 |
Method of manufacturing a cutting element from a partially densified substrate |
December 30, 2008 |
| A method of manufacturing a cutting element having a substrate and an ultra hard material layer sintered together where at least a portion of the substrate is partially densified prior to sintering, is provided. |
| 7469757 |
Drill bit with diamond impregnated cutter element |
December 30, 2008 |
| The present invention provides a bit with cutting structures or inserts that include diamond particles, in which the diamond-impregnated inserts are surrounded by substantially diamond-free support members. The diamond-impregnated inserts are manufactured separately from the bit body |
| 7469618 |
Maintaining carburized case during neutral to the core heat treatment processes |
December 30, 2008 |
| The preferred embodiments are directed toward methods and apparatus for manufacturing components for earth-boring drill bits. In the preferred embodiments, a portion of the component is coated and the component is exposed to a carbon-rich environment at an elevated temperature. During |
| 7467672 |
Orientation tool |
December 23, 2008 |
| An orienting apparatus including at least one housing element configured to couple with a drill string; an actuator disposed inside the at least one housing element; a nozzle coupled to the actuator; a torque generator coupled to the actuator and extending axially downward through the at |
| 7464013 |
Dynamically balanced cutting tool system |
December 9, 2008 |
| A method of dynamically balancing a hole enlargement system is disclosed. The method includes modeling the hole enlargement system based on input parameters, simulating the hole enlargement system, adjusting one or more of the input parameters, and repeating the modeling, simulating, and |
