135222 ⎘
Drill bits Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
Earth drilling reamer with replaceable blades
#302Hole enlargement drilling device and methods for using same
#303Ultra-hard drilling stabilizer
#304Pilot reamer with composite framework
#305Drilling tool
#306Drilling head for reboring a stuck valve
#307Drilling tool
#308BALL HOLE WELDING USING THE FRICTION STIR WELDING (FSW) PROCESS
#309Method of drilling out a reaming tool
#310Force balanced asymmetric drilling reamer and methods for force balancing
#311Joint for use in back reaming
#312Steerable piloted drill bit, drill system, and method of drilling curved boreholes
#313Reamer and methods for directional drilling
#314Methods, systems, and bottom hole assemblies including reamer with varying effective back rake
#315Sectional back reamer apparatus and method for horizontal directional drilling
#316Method and a device for directional control of a rock drilling machine
#317ACTIVE STABILIZATION DURING CUTTING FOR HOLE OPENING TOOLS
#318Method for retrofitting a downhole drill string with a flow through subassembly and method for making same
#319Apparatus and methods for drilling wellbores that utilize a detachable reamer
#320Drilling tool for reducing cutter damage when drilling through formation changes, and methods of design and operation thereof
#321Fixed cutter drill bit for abrasive applications
#322Casing and liner drilling bits and reamers
#323Drill bit and a single pass drilling apparatus
#324Diameter based tracking for window milling system
#325Drill bit with a retained jack element
#326Retaining element for a jack element
#327Reaming tool suitable for running on casing or liner
#328Reamer bit
#329TAPERED REAMER BIT
#330Bi-center drill bit
#331Fixed cutter drill bit for abrasive applications
#332Drilling apparatus with percussive action cutter
#333Method and apparatus for directional drilling
#334Roof drilling system improvements
#335Roof drilling improvements
#336Drill bit assembly
#337Hydraulic drill bit assembly
#338Drill bit and system for drilling a borehole
#339Polycrystaline diamond compact insert reaming tool
#340Earth boring tool
#341Multi-function downhole tool
#342Drilling tool equipped with improved cutting element layout to reduce cutter damage through formation changes, methods of design and operation thereof
#343Window reaming and coring apparatus and method of use
#344Method and apparatus for forming bored hole
#345Drilling tool
#346Reamer assembly
#347Bit assembly
#348Interchangeable reamer
#349Flow through subassembly for a downhole drill string and method for making same
#350Drilling with casing
#351Bottom hole assembly
#352Casing and liner drilling bits
#353Flexible wellbore broach
#354Method and apparatus for casing and directional drilling using bi-centered bit
#355Directional casing and liner drilling with mud motor
#356Rotary drill bit
#357Drilling apparatus
#358Reamer apparatus for ground boring machine
#359Pipe burying method
#360Auger-suction type metro jet system (MJS) device for aerated and lightweight cement soil and construction method thereof
#361Downhole reamer with rotating sleeve
#362Method and apparatus for deploying and cementing liners across challenging well profiles
#363Ruggedized bidirectional cutting system
#364In-ground container installation apparatuses and auger blade assemblies
#365Boring and milling machine for paved slabs
#366Bidirectional stabilizer with impact arrestors
#367Rotational drill bits and drilling apparatuses including the same
#368Drilling rig with mini-stabilizer tool
#369Drilling rig with bidirectional dual eccentric reamer
#370Bidirectional stabilizer
#371Bidirectional dual eccentric reamer
#372Mini-stabilizer tool