1
Norman C MacLeod: Apparatus and method for logging wells while drilling. MacLeod Laboratories, Claude Hamrick, March 25, 1986: US04578675 (174 worldwide citation)

An information while drilling apparatus and method for characterizing strata in the vicinity of a drill bit at the lower end of a drill string, including a down-hole module unit and surface receiving and control units. Excitation currents are caused to pass through the drill string, drill bit and su ...


2
Jack W Romano: Curved bore drilling method and apparatus. James R Vance, July 17, 1990: US04941466 (137 worldwide citation)

A curved bore hole drilling apparatus and method utilizing two power driven drill shafts equipped with flexible shaft sections on the distal ends thereof with each flexible shaft section having a cutting tip. A semicircular channel shaped drill guide loosely engages each flexible shaft end section a ...


3
James B Noble: Directional drilling apparatus and method. Ratner & Prestia, May 19, 1992: US05113953 (129 worldwide citation)

A directional drilling apparatus and method in which the drill bit is coupled to the lower end of a drill string through a universsal joint which allows the bit to pivot relative to the string axis. The bit is contra-nutated in an orbit of fixed radius and at a rate equal to string rotation but in t ...


4
Mark D Mueller, Julio M Quintana, Robert M Hinkel: Coiled tubing drilling apparatus and method. Union Oil Company of California, Gregory F Wirzbicki, William O Jacobson, March 8, 1994: US05291956 (110 worldwide citation)

A low-cost method drilling and completing wells attaches a non-rotating jet drilling tool to coiled tubing. After drilling, the tubing portion outside the well is cut and the remaining tubing becomes the liner or casing for the well. By also using a residual bend remover, centralizers, and injecting ...


5
Ben Wade Oakes Dickinson III, Robert Wayne Dickinson, Robert Nordlund: Multiple lateral hydraulic drilling apparatus and method. Petrolphysics Partners, Flehr Hohbach Test Albritton & Herbert, March 27, 2001: US06206112 (75 worldwide citation)

Hydraulic drilling apparatus and method in which a hole is formed with a series of drill heads and strings of successively smaller diameter. After each section of the hole is formed, the drill head is withdrawn back through the string, leaving the string in place in the hole to serve as a casing for ...


6
Michael L, Leslie D, Charles C: Combined drilling apparatus and method. Cudd Pressure Control, Robert C Shaddox, Windstead Sechrest & Minick P C, December 12, 2000: US06158516 (74 worldwide citation)

Method and apparatus for drilling, completion, well workovers and well control, combining an integrated lifting unit and a coiled tubing unit, the method and apparatus permit running jointed pipe and coil tubing in combination, and standing multiple joints of pipe near the unit. The invention combin ...


7
W Gerald Lott: Jet pump drilling apparatus and method. Nozzle Technology, Bush Riddle & Jackson, July 7, 1998: US05775443 (69 worldwide citation)

A rotary drill bit (10) has a jet pump device including a plurality of jet pump assemblies (26). Each jet pump assembly (26) has an outer housing (28) secured to the bit body (14) and receiving any elongate nozzle member (46) therein in concentric relation to form an annular chamber (48) therein. A ...


8
Robert D Wilkes Jr, Paul S Turin, Michael J Pesavento, Ben W O Dickinson III: Hydraulic drilling apparatus and method. Ben Wade Oakes Dickinson III, Robert Wayne Dickinson, Flehr Hohbach Test Albritton & Herbert, February 12, 1991: US04991667 (52 worldwide citation)

Hydraulic drilling method and apparatus in which the drilling fluid itself is utilized to control the direction in which a hole is bored in the earth. The drilling fluid is discharged through a plurality of forwardly facing nozzles which are inclined at different angles about the axis of the drill h ...


9
William M Moeny: Portable and directional electrocrushing drill. Tetra Corporation, Deborah A Peacock, Vidal A Oaxaca, Peacock Myers P C, July 14, 2009: US07559378 (49 worldwide citation)

The present invention relates to a portable, directional electrocrushing drilling apparatus and method.


10
James M Weldon: Electromagnetic drilling apparatus and method. Marcus L Bates, February 2, 1988: US04722402 (49 worldwide citation)

Oil well drilling apparatus for drilling deep boreholes. The apparatus includes a high frequency, high voltage, AC generator at the surface of the ground which is connected to an electromagnetic hammer drill bit located at the bottom of the borehole. Electric current is conducted along a special dri ...