Kulluk was an ice-strengthened drill barge that was used for oil exploration in the Arctic waters. She was constructed by Mitsui Engineering & Shipbuilding in Japan in 1983 and operated in the Canadian Arctic until 1993 when she was mothballed for over a decade. In 2005, she was purchased and extensively. .
From 1983 to 1993, the rig was operated by in . She was mothballed in 1993, and in 2005 she was. .
Kulluk was strengthened against ice with 3 in (76 mm) thick, reinforced steel, and a funnel-shaped with flared sides enabling her to. .
• on the CIMSS Satellite Blog• McKenzie Funk, , New York Times Magazine, December 30, 2014 [pdf]
Every year, drill rigs and other heavy, specialty equipment used for deep foundation construction (Figure 1) overturn potentially causing injuries and fatalities, as well as damage to the surrounding s. [pdf]
There are two basic types of screw compressor: oil-injected and oil-free. Oil-injected rotary screw compressors are the most common, since they are the cheaper ones of the two types. Oil-free screw co. [pdf]
A rotary-screw compressor is a type of , such as an , that uses a rotary-type positive-displacement mechanism. These compressors are common in industrial applications and replace more traditional where larger volumes of compressed gas are needed, e.g. for large refrigeration cycles such as , or for compressed air systems to operate air-driven tools such as and . For smaller rotor sizes th. [pdf]
A is first thought to have been used for rock drilling in 1844. Many quarries used hand held tools that required the driller to suspend himself from a rope over the quarry face in order to place the drill hole in the required position. This system used small diameter holes and was not only terribly inefficient, but very dangerous due to flying rock as a result of the inaccuracy of the drilled borehole. [pdf]
Self-drilling rock bolts have revolutionized geotechnical engineering by combining drilling, grouting, and anchoring into a single process. At the core of this innovation lies the drill bit—a component tha. [pdf]
When selecting the rock drill bit, it shall be selected according to the type, performance, rock hardness and toughness of the drill bit. Generally, the chisel rock drill bit shall be selected when there is no. [pdf]
The kind of drill bit that can drill through rock is made of tough material that can withstand high temperatures and remains sharp for long periods, making it ideal for drilling through tough materials. Examples include carbide-tipped, diamond-tipped, masonry, and percussion bits..
The kind of drill bit that can drill through rock is made of tough material that can withstand high temperatures and remains sharp for long periods, making it ideal for drilling through tough materials. Examples include carbide-tipped, diamond-tipped, masonry, and percussion bits..
Bit Type: Different bit types work better in certain situations and with certain rock types. A button-type drill bit is ideal for drilling shallow to medium-depth holes in hard rock. Cross-type or threaded bits are the best for punching through incredibly hard rock and making deeper holes. [pdf]
There are many different types of drill bits, each designed for a specific purpose. However, the main factor determining which drill bit to use on rock is the hardness of the material. The harder the rock, th. [pdf]
Button bits with hemispherical button is for high bearing capacity and abrasive resistance while conical button and parabolic button are for high drilling speed and low abrasive resistance..
Button bits with hemispherical button is for high bearing capacity and abrasive resistance while conical button and parabolic button are for high drilling speed and low abrasive resistance..
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Our company specializes inmanufacturing "Kaiyu" brand mine percussion bit with 30 years manufacturing history. We has long experience on rock drilling process and the latest development of rock drills. [pdf]
Designed for intermittent use. Drills with keyed chuck can be tightened with the included key. Drills with keyless chuck open and close without a key for fast bit changes. Styles E, F, and G have a lever throttl. [pdf]
There are many different types of drill bits, each designed for a specific purpose. However, the main factor determining which drill bit to use on rock is the hardness of the material. The harder the rock, th. [pdf]
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