Triple / Double Core Barrel 1.5M to 3M Rock Drilling Equipment
Boart Longear Wireline Core Barrel Q Series NQ HQ PQ Head Assembly
and HQ NQ Overshot Assembly
Wireline Core Barrel
Q series head assembly and overshot assembly
Wireline drilling is the special method of removing the core.
1. Wireline Core Barrels
2. Ideal for use in most drilling conditions
3. Available for application in standard DCDMA hole size
|Size||Metric system(mm)||Imperial system (in)|
|Hole diameter||Core diameter||Hole diameter||Core diameter|
|Triple tube surface|
When the driller wants to remove core from a conventional core
drill, the entire core barrel has to be removed from the hole. This
is time-consuming, as each rod has to be removed one at a time.
With wireline drilling, a barrel of core can be removed from the
bottom of the hole without removing the rod string. When the
driller wants to remove the core, an overshot is lowered on the end
of a wireline. The overshot attaches to the back of the core barrel
inner tube and the wireline is pulled back and the inner tube
disengages itself from the barrel.
Double core tube and tube has outer pipe, rinses through joint
between the internal and external tube water flow to the bottom of
the hole, protecting cores from rinses washouts. Double core tube
has double motion and single movement two kinds. Double motion and
core tube is internal and external core tube following bit and
drill stem rotation, it in no serious loose or broken strata.
Single movement double core tube internal and external tube has
bearing isolation, pipe outer pipe driven only pick up bit
rotation, and broken rock tube does not rotate, avoid to core
friction, vibration, etc., with mechanical damage, so it in serious
loose fractured formations. these, can be well protected cores.
Use double deck core tube take core, bits need to use wall
thickness of the alloy drill or diamond bits.
Due to the rock drill contact surface area increased and the lip
use double deck core tube than ordinary core tube drilling
efficiency to reduce. In the ledge, coal, in order to guarantee
rock (mineral) heart take rate, rules must be use double deck core
tube coring. More complex double core tube, except to finish single
movement, in addition, aluminum, steel tube placed plastic or
qualitative buckled half close tube, have a better protection of
the core role.
1.5m and 3.0m length core barrels are avaiable.
3. Model type
Below is a chart to evaluate core sample sizes and to locate
corresponding core barrel systems
4. ABOUT US:
ROSCHEN a leading manufacturer of Q series core barrel in
China.Both ISO9001: 2000 and API 5DP certificates are available for
our products, and our products have been quite popular among
clients from Mongolia, Kazakhstan, Russia, Iran, Afghanistan, Oman,
Turkey, Thailand, Vietnam, Myanmar, Malaysia, Indonesia, Singapore,
Taiwan, Colombia, Mexico, Brazil, Canada, Australia, etc.