OVERBURDEN MINERAL EXPLORATION DRILLING
Overburden Mineral Exploration Drilling for Water Well Hole Drilling
Overburden at a coal mining site
In mining, overburden (also called waste or spoil) is the material that lies above an area that lends itself to economical exploitation, such as the rock, soil, and ecosystem that lies above a coal seam or ore body. Overburden is distinct from tailings, the material that remains after economically valuable components have been extracted from the generally finely milled ore. Overburden is removed during surface mining, but is typically not contaminated with toxic components and may be used to restore an exhausted mining site to a semblance of its appearance before mining began.
A related term is interburden, meaning material that lies between two areas of economic interest, such as the material separating coal seams within strata.
Overburden may also be used as a term to describe all soil and ancillary material above the bedrock horizon in a given area.
By analogy, overburden is also used to describe the soil and other material that lies above a specific geologic feature, such as a buried astrobleme, or above an unexcavated site of archeological interest.
In particle physics, the overburden of an underground laboratory may be important to shield the facility from cosmic radiation that can interfere with experiments.
In arboriculture, the word is also used for the soil over the top of the roots of a tree collected from the wild.
|Model||Casing sizes||Min. I.D. Dia. of Casing Shoe||Reaming Dia.||Hammer shank||Drill pipe|
|Max. OD||Min. ID||Thread||O.D.||Wrench Flat|
|ODEX90||115||102||90||123||DHD3.5/COP32/QL30||API 2 3/8" REG||76||65|
|ODEX115||142||128||115||152||DHD340/COP44/SD4/QL40/M40||API 2 3/8" REG||76||65|
|ODEX140||171||157||140||187||DHD350R/COP54/SD5/QL50/M50||API 2 3/8" REG||89||65|
|ODEX165||196||183||165||211||DHD360/COP64/SD6/QL60/M60||API 2 3/8" REG||114||95|
|ODEX190||222||205||190||237||DHD360/COP64/SD6/QL60/M60||API 3 1/2" REG||114||95|
|ODEX240||273||261||240||308||DHD380/COP84/SD8/QL80/M80||API 3 1/2" REG||114||95|
|ODEX280||324||305||280||378||SD10/NUMA100||API 4 1/2" REG||114||95|
Stocks is available by any time.
Our products are made of high quality steel and all spares parts are inspected strictly before shipping. We have quickly responses for your complaint and suggestion.
Using ply wooden cases and pallet for package to protect the products and avoid the damagement during transportation. Also we can customize package according to your special requests.
Generally stocks is available.
By air, By Express or By sea according to your requests.
Q: Are you a manufacturer or trading company?
A: We are a specialized manufacturer.
Q: What are your main products, and used for?
A: Our products include core bit, PDC bit, reaming shell, core barrel, casing, drill rod, SPT equipment, Shelby sampler, drill rig and other drilling parts.
They are used for mineral exploration, geological drilling, geotechnical engineering and soil sampling.
Q: How about the delivery terms?
1. Payment: T/T, L/C, Western Union, Paypal, 30% deposit in advance and rest before delivery.
2. Min. order quantity: 1 piece.
3. Transportation: By DHL/TNT/Fedex express, air, sea, train.
Q: How about discount?
A: Price is based on products and order quantity.
Q: Do you accept sample order?
A: Yes sure, please contact us for details.
Q: How about your after-sales service?
A: As a manufacturer, we offer promt technology support for all problems and questions. Besides, we accept goods return or replace for quality problem.
Q: How does your company control the quality?
A: Quality first. In order to guarantee high quality for our products, Roschen always makes a serious inspection for all products and raw materials in strict procedure. We have obtained certificate of ISO9001:2000 in 2004.
For more information please contact:
ROSCHEN GROUP LIMITED
ROSCHEN HOLDINGS LIMITED
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