drill string

(redirected from drill strings)
Also found in: Dictionary.

drill string

[′dril ‚striŋ]
(mechanical engineering)
The assemblage of drill rods, core barrel, and bit, or of drill rods, drill collars, and bit in a borehole, which is connected to and rotated by the drill collar of the borehole.
References in periodicals archive ?
Vallourec's Drilling Products division manufactured 11 complete drill strings for BOMCO, from 2009 to 2011.
An exception was when the south side drill string became stuck and the north side rig was used to push across and assist in freeing the string.
This technology is used routinely in the HDD industry to precisely guide the drill string along its planned trajectory.
We're getting positive feedback from users who say the tool is helpful, especially being able to file and reference drill strings by application.
With connection achieved, the drill strings were pulled back and advanced to the platform until a continuous drill string stretched from shore to platform.
It can be used on drill strings to aid cuttings transport, hole cleaning, increase circulation rates and for tripping dry pipe.
In oil and gas exploration and production, GE provides equipment to enable oilfield service companies to navigate drill strings and to identify underground oil and gas reserves.
They also provide superior control of the drill strings.
Atlas Copco's plant in Fagersta, Sweden, manufactures rock drilling tools to supply complete drill strings for the global mining and construction markets.
A contract for the delivery of 12 drill strings in sour service grade (VM105 DP SSE) equipped with VAM Express connections is inked by Vallourec and Baoji Oilfield Machinery Co.
In April 2008 Heerema Marine Contractors Australia signed a contract with Woodside Energy as operator, on behalf of Australia's NWSV (North West Shelf Venture), for the transport and installation of the North Rankin B Platform substructure and topside, and approached FSCL to tender for the design and build of two large pile top drills and three complete drill strings for the jacket installation works.
In oil & gas exploration and production, GE provides equipment to enable oilfield service companies to navigate drill strings and to identify underground oil and gas reserves.