This single tube female threaded core barrel is provided with conical reaming shell, a standard core lifter, in the case of medium-hard formations or basket retainer, in the case of loose material.
Because of rotating in contact with flowing water it is limited to homogeneous strata and application where high core recovery is not essential.
This double core barrel gives a high penetration because of the small cutting surface. The inner non rotating tube preserves the sample from the torsional stress of the rods and prevents from washing out the core. It gives a high penetration in hard rocks because of the small cutting surface with all the consequent benefits as high coring percentage, less bending and wear on the equipment
Especially suitable for coring with higher penetration speed in any kind of formation. Due to its large fluid passage, it is more suitable than T2 type especially for obtaining core in soft and friable formations where it is necessary for high core recovery to use drilling water and mud.
Especially suitable for coring in soft and friable formations with high core recovery. The plastic liner ensure the high quality of the core, good presentation and ease handling and transportation
This D.T. core barrel with split inner tube resolves need for quality core samples of complex formations. It permits examination of the core and the transfer to the core box with no disturbance. The bottom discharge bit allows the water to bypass the core and prevents erosion of soft materials.
Coring (Core mm)
|Single||Double T2||Double T6||Double T6S||T6 Triplex|
|Hole Ø 46||32||32|
|Hole Ø 56||42||42|
|Hole Ø 66||52||52|
|Hole Ø 76||62||62||57|
|Hole Ø 86||72||72||67|
|Hole Ø 101||83||84||79||72||76|
|Hole Ø 116||96||93||86||90|
|Hole Ø 131||109||108||101||103.5|
|Hole Ø 146||120||123||118|