Drill bit e.g. rock drill, orientation device for e.g. mechanical drilling system, has body with support pads with diameter less than or equal to that of drill bit, and case with pads, so that case is supported on wall of drilled well

摘要

#CMT# #/CMT# The device has a pivot type connection (6) connecting a transmission shaft (3) and a main body (1) and placed in proximity to an interface between the body and an orientable case (2). A deflection system (7) allows to control a relative displacement of the body with respect to the case. The body has support pads (9) with a diameter less than or equal to that of a drill bit (16). The case has support pads (10a) and fixed or expandable pads, so that the case is supported on a wall of a drilled well. The body and the case are blocked in rotation by slotting another wall of a well to be drilled. #CMT# : #/CMT# An independent claim is also included for a method of performing drilling that requires a precise trajectory control. #CMT#USE : #/CMT# Used in petroleum, gas and civil engineering industries for orienting a drill bit e.g. drill, polycrystalline diamond compact (PDC) bit and rock drill, that is utilized in a mechanical or electronic drilling system. #CMT#ADVANTAGE : #/CMT# The device can be utilized and maintained in an easy manner by adapting it to the needs and has a long life duration. The device has a reduced length for providing a better built up rate (BUR) even in case of a low orientation angle of the drill bit. The device is reliable, can be manufactured in an economic manner and can be mounted in an easy manner. The device is compatible with existing inner and outer orientation devices in a better manner. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a detailed longitudinal sectional view of a drill bit orientation device in its curved drilling position. 1 : Main body 2 : Orientable case 3 : Transmission shaft 6 : Pivot type connection 7 : Deflection system 9, 10a : Support pads 11 : Pressurization device 13 : Bottom connection 16 : Drill bit.