Method and apparatus for continuous pilot hole coring

Details Method and apparatus for continuous pilot hole coring Method and apparatus for continuous pilot hole coring

1989-07-18

1990-11-13

Novosad, Stephen J.

Boring or penetrating the earth

Processes

Sampling of earth formations

175101, 175107, E21B 1002, E21B 1062, E21B 1064

Patent

active

049695282

ABSTRACT:
The present invention comprises an improved method and apparatus for taking core samples, wherein a core drilling assembly driven by a downhole fluid motor is retrievably housed within a drilling tool of larger diameter, and wherein a plurality of cores may be cut and retrieved to the surface by withdrawal of the core drilling assembly by including an extender in the core drilling assembly each time it is brought to the surface and returned to the drilling tool, and sequentially cutting another core without postdrilling the previously cored formation section. The extenders may be included either above or below the motor used to drive the core drilling assembly, and are preferably of tubular configuration with screw-threaded connectors at their ends for rapid insertion in and removal from the core drilling assembly.

REFERENCES:
patent: 2898086 (1959-08-01), Freeman et al.
patent: 2910273 (1959-10-01), Bon
patent: 2915285 (1959-12-01), Deily
patent: 2944792 (1960-07-01), Gros
patent: 3903975 (1975-09-01), Sweeney
patent: 3990524 (1976-11-01), Sweeney
patent: 4452322 (1984-06-01), Jurgens
patent: 4518050 (1985-05-01), Sollie et al.
patent: 4773489 (1988-09-01), Makohl
patent: 4875531 (1989-10-01), Biehl et al.

Affiliated with

Also associated with

Rating

Method and apparatus for continuous pilot hole coring does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for continuous pilot hole coring, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for continuous pilot hole coring will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-771586