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Tuesday, August 11, 2015

Pipe Thread

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·         Reverse circulation (RC) drilling utilizes a dual-walled drill pipe (fishing rod) having a solid drill bit to make a hole in a formation and provides rock chips (clippings) to the surface for any subsequent analysis. The drilling mechanism is really a pneumatic reciprocating piston (hammer) driving a tungsten-steel drill bit and a compressor to blow the clippings, produced by the drilling operation, to the surface. Reverse circulation is accomplished by coming air down the rods the differential pressure produces air lift of the clippings up the inner tube that is inside each fishing rod. Normally the air exhausts via a centrifugal classifier to ensure that the rock chips and dust is going to be taken in a sampler. For more information on thread protector, visit our website.

The most generally used RC drill bits are 5-8 inches (12.7-20.32 centimetres) in diameter and have round metal "knobs" that protrude from the bit, that are needed to drill through rock and shale. As the knobs put on down, drilling becomes reduced and the fishing rod string could possibly become bogged in the hole, therefore RC drill rigs must have a superior pullback capacity and hydraulic energy, otherwise attempting to recover the rods might take hrs and in certain cases days.

While operating in remote sites or areas, Reverse Circulation drilling setup usually includes several support automobiles, in addition to the rig itself. The support automobiles hold the drilling rods (dual tube RC pipe), spares, diesel and water tanks, in addition to every other tools and equipment needed for resupplying and rig maintenance.

The majority of the RC drill rigs their very own compressor to create the air pressure required to extract the clippings. However, generally these compressors don't have the energy for much deeper drilling, because of insufficient space on the rig itself for the bigger, more effective models. Alternatively, companies like Drilling Supply, are offeringcompressor free setup, which allows the driller to utilize a compressors with assorted energy ranked results to support their unique project, while using the the same RC Drilling Rig its them. As a result, a damaged air compressor won't cause disruption in the drilling procedures. While a deterioration compressor has been fixed, a backup unit could be quickly used to carry on the drilling operation, saving the drilling contractor energy and money.

RC drilling routinely accomplishes depths as high as 500 metres. This depth resembles those of Gemstone Core drilling, but unlike core drilling, RC drilling doesn't create a solid core. The clippings produced by the RC drill bit are usually shipped to the surface in the order in that they are created although not always. Therefore, RC drilling isn't as accurate as Core drilling. There's not a way of knowing having a 100% certainty which depth the clippings originated from. Also there's a inclination for heavier minerals (e.g. gold) to fall to the bottom of the hole or perhaps be caught in elbows and curves in the drill pipe (Reverse Circulation Drill Pipe). Consequently, assays from RC drilling may understate the quantity of mineralization present in the formation however, this deficiency is basically offset by considerably lower cost of drilling and rapid transmission rates.

Because of this, companies like Drilling Supply allow us amultipurpose hollow spindle rotary drive with variable/reversible hydraulic motor and automatic constant rotation energy control. Drilling Supply are now able to offer drilling companies a capacity to start the drilling operation with Reverse Circulation drilling and once the mineralization warrants it and clean core samples are needed, change to Gemstone Core drilling technique. This is accomplished by utilizing the same drill rig and simply altering from RC drilling tool set to Core drilling tools (coring rods and bit). This enables the driller to rapidly and cheaply achieve the mineralization depth and begin removing quality cores for analysis. Want to know more about OCTG? Do not forget to visit our website today.


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