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Drillstring

Drillstring news and technical articles from Oil & Gas Journal. Search Drillstring latest and archived news and articles

  1. COMPUTER ANALYSIS IMPROVES DEEPWATER DRILLSTRING DESIGN

    Magazine Articles

    Mon, 4 Apr 1994

    lateral support to the drillstring , innovative methods ..... Suspending long drillstrings with additional loads ..... concerns for both the drillstring and the derrick ..... in relatively long drillstrings , which have most ..... the length of the drillstring . This effect, coupled

  2. Causes of Tarim oil field drillstring failures assessed

    Magazine Articles

    Mon, 25 Jan 2010

    torsion load on the drillstring . The drilling program ..... 2005. Four of the drillstrings with 406.4 mm ..... stress borne by the drillstring . This can cause strong ..... loads that damage drillstrings . High-inertia torque ..... torque borne by the drillstring in the case of a bit

  1. SOFT TORQUE ROTARY SYSTEM REDUCES DRILLSTRING FAILURES

    Magazine Articles

    Mon, 12 Oct 1992

    up to 80%), torsional drillstring vibrations, and bit slip ..... conditions to help reduce drillstring failures and improve penetration ..... 2 in.). For tapered drillstrings , (e. g., 3-1/2 in ..... in. x 5-in. tape red drillstring . Because of the small difference

  2. Drillstring sub cuts torque and casing wear

    Magazine Articles

    Mon, 14 Oct 1996

    England A new downhole tool, the drillstring torque-reducing sub, minimizes torque ..... wear in extended reach drilling. This drillstring sub effectively reduced torque losses ..... considerably less than the total length of the drillstring , and the summation of torque losses

  3. Equipment upgrades minimize drillstring fluid losses

    Magazine Articles

    Mon, 2 Aug 1999

    containment systems. Wet drillstrings Tripping operations produce large losses of drillstring fluids when not captured ..... bit jets, the entire drillstring must be pulled "wet ..... example, a 10,000-ft drillstring made up of 41/2

  4. DRILL PIPE MANAGEMENT EXTENDS DRILLSTRING LIFE

    Magazine Articles

    Mon, 28 Oct 1991

    pipe inspections prolong the life of a drillstring . Crews taught to make quick visual ..... repairs. Because of escalating costs of drillstring repair and replacement, Global Marine ..... force estimated that one 20,000-ft drillstring costs about $600,000 and has a 7

  5. ROTATING MOUSEHOLE HELPS MAKEUP AND BREAKOUT DRILLSTRING

    Magazine Articles

    Mon, 21 Feb 1994

    new rotating mousehole tool allows makeup and breakout of drillstring sections without interruption of normal drilling to improve ..... tighten the stand to full torque once the pipe is placed in the drillstring . The tool can makeup bottom hole assemblies, including

  6. SPECIAL REPORT: Aluminum tubulars make efficient drillstring

    Magazine Articles

    Mon, 3 Mar 2008

    weight of the drillstring . As the weight of drillstring decreases, so ..... with aluminum drillstrings due to much smaller ..... reasons: Lighter drillstring decreases the ..... casing and-or drillstrings , hook load acting

  7. DRILLING OPTIMIZED WITH SURFACE MEASUREMENT OF DOWNHOLE VIBRATIONS

    Magazine Articles

    Tue, 16 Feb 1993

    and Meehan, R.J., " Drillstring imaging: An Interpretation ..... The Genesis of Torsional Drillstring Vibrations," SPE Drilling ..... Conditions on the Vibration of Drillstrings ," SPE paper 20447, presented ..... Inc., "ADAMS: Advanced Drillstring Analysis and Measurement

  8. SLIM HOLE MWD TOOL ACCURATELY MEASURES DOWNHOLE ANNULAR PRESSURE

    Magazine Articles

    Mon, 14 Feb 1994

    pressure losses increase with drillstring rotational speed, and the ..... of a purpose built rig and drillstring . The project also worked ..... manufactured two complete drillstrings designed for normal destructive ..... the formation. Flow in the drillstring was obstructed for 20 min

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