drill string


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drill string

or

drill pipe

n
(Mining & Quarrying) (in the oil industry) a pipe made of lengths of steel tubing that is attached to the drilling tool and rotates during drilling to form a bore
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References in periodicals archive ?
The HyPR system consists of a robust full-strength sub, strategically positioned in the drill string. Once the decision is made to sever the pipe, a HyPR Dart is pumped down into a landing sub.
However, the current studies on the non-conservative system, though considering the friction between the drill string and the borehole, usually simplify it as the unidirectional or the isotropic friction, which is quite distinct from the actual condition.
According to the company, the recent patented drill string oscillation tool is composed of two main parts, a hydraulic channeling chamber (HCC) and a rhythmic pulsation chamber (RPC).
Care was taken to select double white band S-135 drill string with a large diameter to accommodate the armored fiber optic cable to be installed.
Here, several tubular strings of different parameters including SDP (steel drill string), TDP (titanium drill string), ADP (aluminum drill string), and CDP (composite drill string) are adopted and the extending limits are, respectively, calculated.
first proposed the drill string buckling more than half a century ago [4, 5].
The drill runs on a 480-volt drive pack and a 700-hp hydraulic motor turning the drill string.
The authors have organized the main body of their text in twelve chapters devoted to drilling methods, drilling fluids, drilling hydraulics, well control and monitoring programs, formation pore and fracture pressure estimation in drilling, the basics of drill string design, and a wide variety of other related subjects.
In the results, vertical vibration dropped by a factor of four and stalling virtually disappeared even with heavy loading (the drill string without NeoTork stalled 15 times).
In addition, SDPI manufactures and markets drill string tools, including the patented Drill-N-Ream well bore conditioning tool, for the oil, natural gas and mining services industries.
In addition, SDPI manufactures and markets drill string tools, including the patented Drill-N- Ream well bore conditioning tool, for the oil, natural gas and mining services industries.
The volume is organized into general data, drill string standards, casing and tubing standards, capacities and annular volumes, bits and motors, hoisting equipment, pumping and pressure losses, mud drilling, cementing, directional drilling, kick control and fishing, wellheads, and geology.