135538 ⎘
Valve arrangements for boreholes or wells in wells operated by movement of casings or tubings
Safety mechanism for a well, a well comprising the safety mechanism, and related methods
#302Wellbore frac tool with inflow control
#303Selectively actuating expandable reamers and related methods
#304Tool assembly including an equalization valve
#305Three-way flow sub for continuous circulation
#306Well barrier
#307Wellbore circulation tool and method
#308Wellbore treatment apparatus and method
#309Sliding stage cementing tool
#310Plug retainer and method for wellbore fluid treatment
#311Valve with shuttle
#312Rotational test valve with tension reset
#313Rotational wellbore test valve
#314Low equivalent circulation density setting tool
#315Tools and methods for use in completion of a wellbore
#316Isolation valve with debris control and flow tube protection
#317Sliding sleeve sub and method and apparatus for wellbore fluid treatment
#318Method and apparatus for wellbore fluid treatment
#319Downhole tool unit
#320Multi-acting Anti-swabbing Fluid Loss Control Valve
#321Method and apparatus for wellbore fluid treatment
#322Anchor/shifting tool with sequential shift then release functionality
#323Activation device
#324System for drilling under balanced wells
#325Repeatable, compression set downhole bypass valve
#326Isolation valve for subterranean use
#327Multi-acting circulation valve
#328Fracturing and gravel packing tool with anti-swabbing feature
#329Subterranean valve operated by string relative movement
#330Remotely operated drill pipe valve
#331Control mechanism for subsurface safety valve
#332Well Release System and Method
#333Dual isolation mechanism of cementation port
#334Tubing weight operation for a downhole tool
#335Method and apparatus for wellbore fluid treatment
#336Hydraulic open hole packer
#337Signal operated tools for milling, drilling, and/or fishing operations
#338Bi-directional flapper valve
#339Methods and devices for treating multiple-interval well bores
#340System for drilling under-balanced wells
#341Pressure balanced piston for subsurface safety valves
#342Downhole valve with pass through ID
#343Actuating mechanism
#344Cementing valve
#345Polished bore receptacle
#346Hydraulic open hole packer
#347Valve and method for controlling flow in tubular members
#348Methods and devices for treating multiple-interval well bores
#349Fluid loss control system and method for controlling fluid loss
#350Combined Anti-Rotation and Flow Control Tool
#351Shear type circulation valve and swivel with open port reciprocating feature
#352Zone isolation assembly for isolating and testing fluid samples from a subsurface well
#353Well tool protection system and method
#354Method and apparatus for wellbore fluid treatment
#355Interventionless Reservoir Control Systems
#356Stop-sand liner hanger assembly for water wells
#357Tubing fill and testing valve
#358Bi-directional fluid loss device and method
#359Aquifer recharge valve and method
#360Fracturing/gravel packing tool with variable direction and exposure exit ports
#361Split ball valve
#362Circulating sub and method
#363Method and apparatus for wellbore fluid treatment
#364System and method for fail-safe disconnect from a subsea well
#365Interventionless reservoir control systems
#366Well tool protection system and method
#367High temperature fluid-driven dual-mode circulation tool
#368Hollow design for controlled release of downhole sensors
#369Circulating tool for assisting in upward expulsion of debris during drilling
#370Resealable tubing drain for oilfield service
#371Multi-frac tool
#372Fluid communication with an earth formation through cement
#373Systems and methods for production zone control