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Class Information
Number: 175/73
Name: Boring or penetrating the earth > Means traveling with tool to constrain tool to bore along curved path
Description: Apparatus comprising means carried by or movable with a tool while drilling to cause the tool to drill a bore or segment of a bore having a nonlinear axis.










Sub-classes under this class:

Class Number Class Name Patents
175/76 Axially spaced opposed bore wall engaging guides 161
175/75 Normally curved guide or shaft 99
175/74 Sectional guide or shaft having means to lock sections in angular relation while boring 149


Patents under this class:
1 2 3 4 5 6 7 8 9

Patent Number Title Of Patent Date Issued
6702042 Method and device for rotary well drilling Mar. 9, 2004
6698535 Floating offset transmitter housing underground directional drilling tool Mar. 2, 2004
6691804 Directional borehole drilling system and method Feb. 17, 2004
6655460 Methods and apparatus to control downhole tools Dec. 2, 2003
6640909 Steerable rotary drilling device Nov. 4, 2003
6629571 Downhole motor assembly Oct. 7, 2003
6609579 Drilling assembly with a steering device for coiled-tubing operations Aug. 26, 2003
6607045 Steering apparatus Aug. 19, 2003
6607044 Three dimensional steerable system and method for steering bit to drill borehole Aug. 19, 2003
6598687 Three dimensional steerable system Jul. 29, 2003
6595303 Rotary steerable drilling tool Jul. 22, 2003
6571888 Apparatus and method for directional drilling with coiled tubing Jun. 3, 2003
6561289 Bottomhole assembly and methods of use May. 13, 2003
6536539 Shallow depth, coiled tubing horizontal drilling system Mar. 25, 2003
6530439 Flexible hose with thrusters for horizontal well drilling Mar. 11, 2003
6527067 Lateral entry guidance system (LEGS) Mar. 4, 2003
6516900 Apparatus for directional drilling Feb. 11, 2003
6516899 Method and apparatus for directional boring under mixed conditions Feb. 11, 2003
6494272 Drilling system utilizing eccentric adjustable diameter blade stabilizer and winged reamer Dec. 17, 2002
6488104 Directional drilling assembly and method Dec. 3, 2002
6484822 Cutting structure for earth boring drill bits Nov. 26, 2002
6484819 Directional borehole drilling system and method Nov. 26, 2002
6464022 Mobile horizontal directional boring apparatus and method for use in boring from existing utility manholes Oct. 15, 2002
6460633 Side tracking bit Oct. 8, 2002
6439325 Drilling apparatus with motor-driven pump steering control Aug. 27, 2002
6439321 Piston actuator assembly for an orienting device Aug. 27, 2002
6431291 Packerfoot with bladder assembly having reduced likelihood of bladder delamination Aug. 13, 2002
6419033 Apparatus and method for simultaneous drilling and casing wellbores Jul. 16, 2002
6415878 Steerable rotary drilling device Jul. 9, 2002
6401842 Directional drilling apparatus with shifting cam Jun. 11, 2002
6394193 Downhole adjustable bent housing for directional drilling May. 28, 2002
6390087 Drill bit for directional drilling May. 21, 2002
6349778 Integrated transmitter surveying while boring entrenching powering device for the continuation of a guided bore hole Feb. 26, 2002
6340063 Steerable rotary directional drilling method Jan. 22, 2002
6318481 Drill string deflector sub Nov. 20, 2001
6318480 Drilling of laterals from a wellbore Nov. 20, 2001
6315044 Pre-milled window for drill casing Nov. 13, 2001
6308790 Drag bits with predictable inclination tendencies and behavior Oct. 30, 2001
6296066 Well system Oct. 2, 2001
6290002 Pneumatic hammer drilling assembly for use in directional drilling Sep. 18, 2001
6290003 Controllable stabilizer Sep. 18, 2001
6279669 Indexing mechanism and apparatus incorporating the same Aug. 28, 2001
6260636 Rotary-type earth boring drill bit, modular bearing pads therefor and methods Jul. 17, 2001
6257356 Magnetorheological fluid apparatus, especially adapted for use in a steerable drill string, and a method of using same Jul. 10, 2001
6244361 Steerable rotary drilling device and directional drilling method Jun. 12, 2001
6234259 Multiple cam directional controller for steerable rotary drill May. 22, 2001
6227312 Drilling system and method May. 8, 2001
6216802 Gravity oriented directional drilling apparatus and method Apr. 17, 2001
6213205 Pressure activated bendable tool Apr. 10, 2001
6213226 Directional drilling assembly and method Apr. 10, 2001

1 2 3 4 5 6 7 8 9










 
 
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