US 12,312,912 B2
Downhole method and associated apparatus
Brian Storie, Aberdeen (GB); and Barry Reid, Sauchen (GB)
Assigned to Hydropulsion Limited, (GB)
Appl. No. 17/641,340
Filed by Hydropulsion Limited, Aberdeen (GB)
PCT Filed Sep. 8, 2020, PCT No. PCT/GB2020/052154
§ 371(c)(1), (2) Date Mar. 8, 2022,
PCT Pub. No. WO2021/048533, PCT Pub. Date Mar. 18, 2021.
Claims priority of application No. 1912956 (GB), filed on Sep. 9, 2019; and application No. 2002154 (GB), filed on Feb. 17, 2020.
Prior Publication US 2022/0341288 A1, Oct. 27, 2022
Int. Cl. E21B 34/10 (2006.01); E21B 21/00 (2006.01); E21B 21/08 (2006.01); E21B 21/10 (2006.01); E21B 21/16 (2006.01); E21B 23/00 (2006.01); E21B 37/00 (2006.01)
CPC E21B 34/10 (2013.01) [E21B 21/003 (2013.01); E21B 21/08 (2013.01); E21B 21/103 (2013.01); E21B 21/16 (2013.01); E21B 23/006 (2013.01); E21B 37/00 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A circulating downhole tool for selectively diverting fluid to one of: below the circulating downhole tool; or into an annulus between the circulating downhole tool and a wellbore;
wherein the tool comprises a cycle valve device that is cyclable utilising a change in pressure above and/or below a pre-determined fluid pressure to trigger the cycle valve device to vary fluid flow diversion cyclically between below the tool and the annulus;
wherein the cycle valve device comprises a plurality of axial through holes;
wherein the tool comprises a plurality of channel holes comprising a first set of channel holes in fluid communication with a region below the circulating downhole tool and a second set of channel holes in fluid communication with one or more side ports;
wherein the tool is configured to selectively open and close the one or more side ports by rotational movement of the cycle valve device about a centre-line axis of the tool, the rotational movement being responsive to a longitudinal movement of at least a portion of the cycle valve device, the longitudinal movement being associated with or triggered by a change in fluid flow or pressure by turning on or off a pump, wherein the rotation of the cycle valve device is configured to selectively align the plurality of axial through holes with the first and/or second set of channel holes; and
wherein the tool is configured to be remotely operated from surface by an operator to allow selective and unlimited activation of the tool without having to be tripped or pulled out of the wellbore.