CORE SAMPLE HANDLING DEVICE

DEVICES FOR MARKING A CORE SAMPLE

Apparatuses And Methods For Use With Reverse Circulation Overshot Systems

GREASELESS CORE BARREL HEAD ASSEMBLY

CORING TOOLS HAVING CORING SHAFTS WITH ASSOCIATED INTERNAL STATIC SLEEVES

DEPLOYMENT TOOL AND METHOD

DEVICES, SYSTEMS, AND METHODS FOR RETRIEVING INNER TUBES

Inner tube assembly of drill tool and rope coring drill tool thereof

A CORE SAMPLE HANDLING DEVICE

CORE BARREL AND CORE DRILLING SYSTEMS AND METHODS

Apparatuses and methods for use with reverse circulation overshot systems

Drilling System for Recovering Nearly Undisturbed Cores From Loose to Solid Ground

Directional drilling

METHOD AND SYSTEM FOR ENABLING ACQUISITION OF BOREHOLE SURVEY DATA AND CORE ORIENTATION DATA

IMPROVEMENT RELATING TO DRILL RODS

Core barrel head, inner tube assembly provided with same, and inner tube recovery method

Downhole core plug apparatuses and related methods

Drilling control mechanism of core drilling rig

Driving system for core drilling rig

Drilling mechanism of coring drilling rig

Check valve, associated downhole data collection system and inner core

Upper head assembly for a core barrel

Wire-line core drilling tool

Sealed pressured horizontal directional drilling continuous coring device for engineering geological investigation

Long-distance core drilling method suitable for a horizontal geological core drilling rig

Downhole device delivery and associated drive transfer system and method of delivering a device down a hole

CORE SAMPLE ORIENTATION

Directional drilling

Cutting tool with porous regions

Check valve, associated downhole data collection system and inner core

Downhole device delivery and associated drive transfer system and method of delivering a device down a hole

Core tube handling device

Core tube displacer for long reach drilling machines

Wire rope coring drilling rig and new green construction method capable of replacing trench and shallow-shaft explorations

Inner barrel shear zone for a coring tool

DOWNHOLE TOOL WITH PROTECTIVE COVERING

CORE SAMPLE ORIENTATION

Downhole surveying and core sample orientation systems, devices and methods

Inner barrel crimping connection for a coring tool

Method and system for enabling acquisition of borehole survey data and core orientation data

CORE SAMPLE ORIENTATION

Braking devices for drilling operations, and systems and methods of using same

Check valve, associated downhole data collection system and inner core barrel assembly

Float valve sub

Coring inner barrel connections for core of rock protection

Core barrel head assembly and method

Sealed core storage and testing device for a downhole tool

SHOCK INDUCEMENT IN CORE BARREL ASSEMBLY

Use of pre-stressed steel strand in the procedure of multi-angle drilling coring

Apparatus and method for withdrawing cores from drilled holes

Core Release System and Method

Braking devices for drilling operations, and systems and methods of using same

CORE SAMPLE ORIENTATION

Cleaning and separating fluid and debris from core samples and coring systems

Alignment system for alignment of a drill rod during drilling

Head assembly and a valve system for use in a core drilling system

Extendable pilot for barrel cutter

Safety latch for a downhole tool

Release valve used in an inner tube assembly for use with a core barrel

Overshot tool having latch control means

Seated hammer apparatus for core sampling

Head assembly

Diamond core drill wire line latch assembly

Coring tool including core bit and drilling plug with alignment and torque transmission apparatus and related methods

Core drilling tools with external fluid pathways

Core barrel head assembly

Driven latch mechanism

Pressure core barrel for retention of core fluids and related method

Sealed core

Core drilling tools with retractably lockable driven latch mechanisms

Latch body components having multiple functions, and drilling head assembly incorporating same

Core drilling tools with retractably lockable driven latch mechanisms

Up-hole bushing and core barrel head assembly comprising same

Quickly reconfigurable core barrel head assembly

Instrumented core barrels and methods of monitoring a core while the core is being cut

High productivity core drilling system

Extendable pilot bit for barrel cutter

Sonic latch mechanism

Hydrocarbon formation core protection and transportation apparatus

Core barrel assembly including a valve

CORE SAMPLE ORIENTATION

SYSTEMS AND METHODS FOR LIMITING WINCH OVERRUN

Core drill and coring method

High pressure coring assembly and method

LARGE BORE JAR FOR A DRILL STRING

Locking device for a drilling device

Head assembly

Drilling system for enhanced coring and method

CORE SAMPLE ORIENTATION

Core barrel restraint

Core barrel assemblies with braking devices

Methods of braking core barrel assemblies

Locking mechanism for a ground drill

CORE SAMPLE ORIENTATION

Core drilling tools with external fluid pathways

Core drilling tools with retractably lockable driven latch mechanisms

Driven latch mechanism

Pump-in seal

Method and device for core drilling

Sealed core

Hydro-percussive mechanisms for drilling systems

High productivity core drilling system

CORE SAMPLE ORIENTATION

Core barrel sonic latch mechanism and methods of sonic drilling using the same

Braking devices for use in drilling operations

Detachable latch head for core drilling

Vibratory unit for drilling systems

Positive Indication of Latching in an Inner and Outer Tube Assembly, Especially for Downhole Assemblies

Core sample orientation

Logging-while-coring method and apparatus

One-step directional coring or drilling system

Remote operation wire line core sampling device

Logging-while-coring method and apparatus

One-step directional coring or drilling system

Multifunctional directional wireline core drilling device