Arrival Oil Tools, Inc.

Daniel John Robson

Laurier E Comeau

Christopher Walter Konschuh

Paul Allan Sibbald

A downhole apparatus for reaming a borehole incorporates two sets of cutting structures into two integral blade stabilizers, one oriented downhole and the other oriented uphole. The cutting structures comprise polycrystalline diamond cutters that are brazed into a wedge of steel that is inserted into the body of the reamers in an axial direction and retained by a stop block and retention cover that is bolted into the reamer. The two integral blade stabilizers have a combination left hand/right hand blade wrapping to provide 360&#xb0; support around the circumference of the reamer. Between the two stabilizers, an impeller and a flow accelerator agitate cuttings on the low side of the borehole to mix the cuttings in with the drilling mud.

Reamer

A downhole, hydraulically actuated drilling stabilizer that provides versatility in a bottom-hole assembly. The drilling stabilizer can be used in a directional drilling application to help control the inclination in an extended reach or horizontal well. The drilling stabilizer has stabilizer blade members with an angular design portion that provides versatility in a bottom-hole assembly. The stabilizer could also be used in a conventional rotary bottom-hole assembly, or positioned below a steerable motor.

Drilling stabilizer

A rotating drill string sub redistributes wellbore drill cuttings into the drilling fluid flowstream to improve the efficiency of the drilling operation. Standoff elements are located on each side of an agitator, all configured on a relatively short section of drill pipe. The agitator comprises a plurality of alternating blades standing radially outward from and arranged helically about the axis of the sub, and grooves located between pairs of adjacent blades, each groove comprising a flow channel that is open at both ends of the agitator. The standoff elements contain abutment surfaces having an outer diameter greater than the outer diameter of the agitator, so that the agitator is prevented from contacting the wall of the wellbore and therefore does not experience the forces that the standoff elements experience.

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Okotoks, Canada

Daniel John Robson