Directional drilling system with eccentric mounted motor and bia

Details Directional drilling system with eccentric mounted motor and bia Directional drilling system with eccentric mounted motor and bia

1991-01-28

1992-07-28

Novosad, Stephen J.

Boring or penetrating the earth

With signaling, indicating, testing or measuring

Tool position direction or inclination measuring or...

175 61, 175 62, 175121, 175162, E21B 402, E21B 420, E21B 708, E21B 47022

Patent

active

051334186

ABSTRACT:
Apparatus and method for a directional drilling system is disclosed wherein a concrete pit is poured at a reference entry angle in the earth so that a drilling platform cartridge inserted into the concrete pit is set at the desired entry angle. A frame, including elongated guide ways extending between ends of the platform cartridge, guides a carriage that advances a drill string through the earth at the reference angle. Preferably, a drilling head at the end of the drill string and the remainder of the drill string are rotated by a drive motor carried on the carriage. A drill bit and drill bit motor are mounted coaxially and eccentric with respect to the drilling head. The center axis of the drill bit and drill bit motor, and the center axis of the rotating drilling head are offset and define a known relationship. The offset relationship between the center axis of the drill bit and drilling head defines an eccentric position in which the drill bit overcuts relative to the outside diameter of the drilling head in an eccentric position. As long as the drilling bit and drilling head rotate simultaneously, movement of the drill string is controlled generally in a straight line. If rotation of the drilling head is stopped, the drill string is steered in the direction of the eccentric position of the drill bit since there is no clearance on the opposing side of the drilling head.

REFERENCES:
patent: 1726438 (1929-08-01), Knorr
patent: 2196260 (1940-04-01), Gatto
patent: 2879033 (1959-03-01), Edwards et al.
patent: 2904310 (1959-09-01), Leonard
patent: 3926268 (1975-12-01), Coski
patent: 4267893 (1981-05-01), Mannon, Jr.
patent: 4629014 (1986-12-01), Swisher et al.
patent: 4739841 (1988-04-01), Das
patent: 4747303 (1988-05-01), Fontenot
patent: 4909336 (1990-03-01), Brown et al.

Affiliated with

Also associated with

Rating

Directional drilling system with eccentric mounted motor and bia does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Directional drilling system with eccentric mounted motor and bia, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Directional drilling system with eccentric mounted motor and bia will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1682693