US 12,188,325 B2
Apparatuses and methods for use with reverse circulation overshot systems
Anthony Lachance, Burlington (CA); and Andres MacLoughlin, Grange (AU)
Assigned to Boart Longyear Company, Salt Lake City, UT (US)
Appl. No. 18/033,977
Filed by BLY IP INC., Salt Lake City, UT (US)
PCT Filed Oct. 27, 2021, PCT No. PCT/US2021/056845
§ 371(c)(1), (2) Date Apr. 26, 2023,
PCT Pub. No. WO2022/093954, PCT Pub. Date May 5, 2022.
Claims priority of provisional application 63/235,437, filed on Aug. 20, 2021.
Claims priority of provisional application 63/106,677, filed on Oct. 28, 2020.
Prior Publication US 2023/0399916 A1, Dec. 14, 2023
Int. Cl. E21B 33/12 (2006.01); E21B 25/02 (2006.01); E21B 34/10 (2006.01); E21B 47/06 (2012.01)
CPC E21B 33/12 (2013.01) [E21B 25/02 (2013.01); E21B 34/10 (2013.01); E21B 47/06 (2013.01); E21B 2200/04 (2020.05)] 18 Claims
OG exemplary drawing
 
1. A system having a longitudinal axis, the system comprising:
a drill string sub that is configured to couple to a drill rod of a drill string having an inner surface, wherein the drill string sub comprises an outer surface and an inner surface defining an inner bore; and
a plug assembly that is received within the inner bore of the drill string sub and releasably coupled to the drill string sub, wherein, when decoupled from the drill string, the plug assembly is configured to be pumped into the drill string, wherein the plug assembly comprises:
a distal subassembly that defines a receiver that is configured to engage a reverse circulation overshot; and
a proximal subassembly that is coupled to the distal subassembly, wherein the proximal subassembly comprises a brake apparatus that is configured to inhibit proximal movement of the plug assembly.