---TT?Series?Core?Barrel???????????????????????????????????????????????????????????????????????????????????Ultra-thin?walled?double?tube?core?barrels,?available?diameters?46?and?56?mm.?Very?thin cutting face allows?very?rapid?rate?of?penetration?through?hard?formations.

They?are?suitable for underground? mining?applications.

---T2?Series?Double?Tube?Core?Barrels The?T2?Series?are?thin?wall?double?tube?core?barrel,?used?for?surface?exploration,?especially mining?applications.?

Due?to?their?thin?kerf,?these?core?barrels?provide?rapid?penetration.?Available?in?diameters? 46,?56,?66,?76,?86,?101mm.

---T6?Series?Double?Tube?Core?Barrels These?are?a?continuation?of?the?T2?series,?but?of?a?sturdier?design?and?available?in?larger diameters,? 76,?86,?101,?116.?131?and?146mm.?

They?are?applied?in?surface?mining?and?geotechnical?drilling.

---LTK?48?&?LTK?60?Double?Tube?Core?Barrels The?LTK?series?core?barrels?system?is?a?thinner?wall?core?barrel?than?T2?series.?They?offer?a?cost?effective,? high?production,?which?is?designed?for?optimum?production?and core?recovery?in?medium?to?extra?hard? rock?formations.

?Available?sizes?48?and?60mm.

---WF?Series?Double?Tube?Core?Barrels They?are?geotechnical?core?barrels?primarily?designed?for?coring?relatively?soft?formations?in?using?face-discharge?bits.?Simple?construction?and?more?resilient?to?damage?than?thin-wall?barrels,but?with?slower?enetration?rate.

---WG?Series?Double Tube?Core?Barrels There?are?Double?tube?core?barrels?for?WG?series.?Available?in?DCDMA?sizes?E,?A,?B,?N,? and?H.

---TBW?and?TNW?Core?Barrels
These?are?thin-walled?double?tube?core?barrels,?as?T2?series?but?with?DCDMA?hole?sizes?B?and?N. Used for?surface?exploration,? specially?mining?applications.?

The?thin?kerf area?allows?rapid?penetration.

---Wireline?Double?Tube?Core?Barrels Wireline?double?core?barrels?are?primarily?used?in?deep?coring.?With?an?overshot device,?they?eliminate the?need?to?couple?and?uncouple?the?rod?string?each?time?the?core?is?retrieved.?Available?in?DCDMA?sizes A,?B,?N,?H?,and?P.

---Chinese?Standard?Double?Tube?Core?Barrels

---Chinese?Standard?Wireline?Double?Tube?Core?Barrels?

---Jet-type Reverse Circulation Double?Tube?Core?Barrels?

---MLC (Triefus)?Series?Core?Barrels

These?triple?tube?core?barrels?are?generally?used?for?geotechnical?purpose,?designed?to?maximize? core?recovery?in?soft?formations.?Available?diameter?sizes?from?35-146mm.

---Wireline?Triple?Tube?Core?Barrels

Wireline?triple?tube?core?barrels?are?generally?required?in?broken,?fractured?formations.?They? incorporate?a?third,?split?inner?tube?on?base?of?wireline?double?tube?core?barrel.?This?can?be? pumped?out?of?the?inner?tube?after?retrieval,?allowing?the?core?to?be?examined?in?its?in-situ?state.?