US 11,988,045 B2
Eccentric reaming tool
Sorin Gabriel Teodorescu, Houston, TX (US); Donnie Williams, Houston, TX (US); Lot William Short, Jr., Dallas, TX (US); Robert B. Beggs, Rowlett, TX (US); and Richard E. Beggs, Rowlett, TX (US)
Assigned to Stabil Drill Specialties, L.L.C., Lafayette, LA (US)
Filed by Stabil Drill Specialties, L.L.C., Lafayette, LA (US)
Filed on Dec. 7, 2022, as Appl. No. 18/062,851.
Application 18/062,851 is a continuation of application No. 16/256,690, filed on Jan. 24, 2019, granted, now 11,603,709.
Claims priority of provisional application 62/621,276, filed on Jan. 24, 2018.
Prior Publication US 2023/0094335 A1, Mar. 30, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. E21B 10/26 (2006.01); E21B 7/28 (2006.01); E21B 10/43 (2006.01)
CPC E21B 10/26 (2013.01) [E21B 7/28 (2013.01); E21B 10/43 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A reaming tool for use in a wellbore, the reaming tool comprising:
(a) an elongated tubular body with an outer surface;
(b) at least a reamer section and a stabilizer section formed on the tubular body, the reamer section and the stabilizer section (i) being positioned circumferentially opposite one another, and (ii) each having at least two blades, wherein the blades have a pitch angle with respect to an axis perpendicular to a longitudinal axis of the tubular body of 5° to 15°;
(c) the reamer section including at least one rounded dome insert configured not to have a cutting effect and a majority of cutting tooth inserts, wherein (i) a number of rounded dome inserts in the reamer section as a percentage of total inserts in the reamer section is less than 30%, and (ii) an uppermost surface of the at least one rounded dome insert in the reamer section is elevated at least as high as an uppermost surface of the cutting tooth inserts in the reamer section to protect the cutting tooth inserts;
(d) the stabilizer section including only exclusively rounded dome inserts configured not to have a cutting effect and no cutting tooth inserts, wherein the rounded dome inserts have no abrupt surface changes or edges;
(e) wherein the total inserts are positioned on the blades of the reamer section, such that the total inserts extend along less than 50% of an entire circumference of the outer surface of the tubular body; and
(f) wherein the total inserts are positioned on the blades of the stabilizer section such that the total inserts extend along less than 50% of the entire circumference of the outer surface of the tubular body.