US 9,810,025 B2
Hydraulic activation of mechanically operated bottom hole assembly tool
Olivier Mageren, Jette (BE); and Khac Nguyen Che, Brussels (BE)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Jul. 24, 2015, as Appl. No. 14/808,608.
Application 14/808,608 is a continuation of application No. 14/369,901, granted, now 9,121,226, previously published as PCT/US2014/012928, filed on Jan. 24, 2014.
Claims priority of provisional application 61/756,617, filed on Jan. 25, 2013.
Prior Publication US 2015/0330182 A1, Nov. 19, 2015
Int. Cl. E21B 23/08 (2006.01); E21B 23/10 (2006.01); E21B 34/14 (2006.01); E21B 21/10 (2006.01); E21B 7/28 (2006.01); E21B 10/32 (2006.01); E21B 10/26 (2006.01); E21B 10/60 (2006.01); E21B 34/06 (2006.01); E21B 34/00 (2006.01)
CPC E21B 7/28 (2013.01) [E21B 10/26 (2013.01); E21B 10/322 (2013.01); E21B 10/325 (2013.01); E21B 10/60 (2013.01); E21B 21/10 (2013.01); E21B 34/063 (2013.01); E21B 34/14 (2013.01); E21B 2034/002 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method of hydraulically activating a mechanically operated wellbore tool in a bottom hole assembly, the method comprising:
lowering the bottom hole assembly into a wellbore;
holding a filter actuation assembly of the bottom hole assembly in an unactivated position using one or more shear pins and comprising;
a disc shaped filter head received in an annular seat of a movable cylindrical rack and including flow orifices, each of the flow orifices configured to receive at least one drop ball carried in a drilling fluid flowing through the hydraulically activated mechanical wellbore tool and to plug at least a portion of the flow orifices and restrict a flow of a drilling fluid through at least some of the flow orifices to increase a hydraulic pressure of the drilling fluid sufficient to activate a hydraulic tool in the bottom hole assembly;
a cylindrical sleeve disposed concentrically around the cylindrical rack, the cylindrical sleeve including a movable inner sheath having flow ports in a side wall thereof, and a fixed outer sheath, the inner sheath defining an annular lip that seals against the filter head, and
at least one shear pin holding the cylindrical rack and the inner sheath in an unactivated position, the movable inner sheath being movable with respect to the fixed outer sheath upon a shearing of the at least one shear pin due to the increase of hydraulic pressure to expose the flow ports to a fluid flow to decrease the hydraulic pressure within the hydraulically activated mechanical wellbore tool;
inserting drop balls into a drilling fluid;
flowing the drilling fluid and the drop balls to flow orifices in the filter actuation assembly;
plugging at least some of the flow orifices with the drop balls, thereby restricting a flow of the drilling fluid through at least some of the flow orifices of the filter actuation assembly and correspondingly creating a hydraulic pressure of the drilling fluid;
increasing the hydraulic pressure on the one or more shear pins supporting the filter actuation assembly
to a pressure sufficient to activate the mechanically operated wellbore tool of the bottom hole assembly located upstream of the filter actuation assembly and to shear the one or more shear pins, thereby allowing the cylindrical sleeve disposed around the cylindrical rack of the filter actuation assembly to move downward with respect to the fixed outer sheath of the filter actuation assembly and to an activated position to open flow ports of the filter actuation assembly and provide a flow path for the drilling fluid to pass through the mechanically operated wellbore tool and decrease the hydraulic pressure within the mechanically operated wellbore tool.