US 12,286,845 B2
Slimline stop collar with seal to prevent micro-annulus leakage
Douglas Farley, Missouri City, TX (US); and Darko Arsoski, Angus (GB)
Assigned to DOWNHOLE PRODUCTS LIMITED
Appl. No. 18/729,345
Filed by DOWNHOLE PRODUCTS LIMITED, Aberdeen (GB)
PCT Filed Jan. 18, 2023, PCT No. PCT/IB2023/050424
§ 371(c)(1), (2) Date Jul. 16, 2024,
PCT Pub. No. WO2023/209442, PCT Pub. Date Nov. 2, 2023.
Claims priority of provisional application 63/334,889, filed on Apr. 26, 2022.
Prior Publication US 2025/0092743 A1, Mar. 20, 2025
Int. Cl. E21B 17/10 (2006.01); E21B 7/02 (2006.01); E21B 10/30 (2006.01); E21B 33/129 (2006.01)
CPC E21B 17/1078 (2013.01) [E21B 7/024 (2013.01); E21B 10/30 (2013.01); E21B 33/129 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A stop collar for mounting to a downhole tubular, comprising:
a cylindrical housing having a threaded inner surface and a tapered inner surface;
a compressible slip ring having teeth formed in an inner surface thereof and a pair of tapered outer surfaces;
a cam ring having a tapered inner surface;
a seal receivable in the housing;
a cylindrical bolt having a threaded outer surface,
wherein:
a natural outer diameter of each ring is greater than a minor diameter of the threaded surfaces, and
screwing the threaded surfaces of the housing and the bolt is operable to drive the tapered surfaces together and compress the seal, thereby compressing the slip ring such that the teeth engage a periphery of the tubular and energizing the seal into engagement with the periphery of the tubular.