US 9,611,727 B2
Apparatus and method for fracturing a wellGeneral
US 9,611,727 B2
Apparatus and method for fracturing a well
Tech Center:
3600 Transportation, Construction, Electronic Commerce, Agriculture, National Security and License and Review
Examiner:
Wei Wang
Art Unit:
3676 Wells, Earth Boring/Moving/Working, Excavating, Mining, Harvesters, Bridges, Roads, Petroleum, Closures, Connections, and Hardware
Agent:
Inventors:
Sean Patrick Campbell; William Jani
Assignee:
Priority:
04/28/10
Filed:
04/28/11
Granted:
04/04/17
Expiration:
10/04/32
Abstract
An apparatus and method is provided for fracturing a well in a hydrocarbon bearing formation. The apparatus can include a valve subassembly that is assembled with sections of casing pipe to form a well casing for the well. The valve subassembly includes a sliding piston that is pinned in place to seal off ports that provide communication between the interior of the well casing and a production zone of the formation. A dart can be inserted into the well casing and propelled by pressurized fracturing fluid until the dart reaches the valve subassembly to plug off the well casing below the valve subassembly. The force of the fracturing fluid against the dart forces the piston downwards to shear off the pins and open the ports. The fracturing fluid can then exit the ports to fracture the production zone of the formation.
Cooperative Patent Classification (CPC)
E21E21B2200/06E21B