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Hardening

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

  1. Appropriate practices avoid tube fitting failures

    Magazine Articles

    Mon, 7 Oct 2002

    to the back ferrule (Fig. 3). The nitride hardening of the ferrule led to the failure, although ..... the fitting manufacturer, considered nitride hardening as the best ferrule hardening technology at the time of the fitting's manufacturing

  2. Russian field tests yield cements for arctic wells

    Magazine Articles

    Mon, 21 May 2007

    kinetic deviations during the hydration of hardening cement in contrast to hydration at normal ..... mechanism was the basis to design materials hardening at temperatures below freezing, including ..... crystallization is a limiting stage of the hardening process. Correspondingly, by adding

  1. Watching Government: Systems and weather events

    Magazine Articles

    Mon, 31 Mar 2014

    said. Two kinds of options It said options to reduce such vulnerability fall into two broad categories: hardening and resiliency. " Hardening measures involve physical changes that improve the durability and stability of specific pieces of infrastructure

  2. Tests prove indentation technique for assessment of in-service line pipe

    Magazine Articles

    Mon, 13 Oct 2003

    deformation process is similar to the work- hardening behavior of the uniaxial tensile test ..... determined by a constant (c) and the work- hardening exponent (n) for steels in Equation ..... of steels. The exact values of work- hardening exponent, equivalent stress, and strain

  3. Changes proposed for determining line pipe wall thickness

    Magazine Articles

    Mon, 21 Feb 2005

    to pressures uses an elastic, linear hardening stress-strain diagram (showing the ..... proposed equation for calculating the hardening modulus is based upon the assumption ..... of the yield strength, and linear hardening lasts up to the yield stress (Equation

  4. UFRJ, Petrobras study strength behavior of expandable tubulars

    Magazine Articles

    Mon, 17 Nov 2008

    took into account material kinematic hardening , contact between tubulars and the conical ..... material behavior. We followed a kinematic hardening plasticity model in addition to the isotropic ..... induced anisotropy caused by strain- hardening (Bauschinger effect). Interestingly

  5. Russians study annulus cement in Arctic wells

    Magazine Articles

    Mon, 28 Aug 2006

    Form a tight cement sheath. Hydration, hardening The processes of Portland cement hydration ..... use thermal methods to intensify cement hardening (heating the mixing liquid; squeezing ..... destruction. This is achieved by: Cement hardening under absolute values of negative temperature

  6. OGJ Newsletter

    Magazine Articles

    Mon, 18 Oct 2010

    crippling local refinery operations. While the transportation strikes and others seem to be easing, industrial action is hardening at refineries throughout the country as well as at port terminals. Compagnie Industrielle et Maritime (CIM) at Le Havre

  7. Pacific Rubiales Energy seeks downstream market integration

    Magazine Articles

    Mon, 15 Nov 2010

    search for growth while diversifying the company's resource base. Competition for deep conversion refining capacity is hardening regionally. Pacific Rubiales does not plan to buy refinery assets but will move into mitigating the volatility in netbacks

  8. Strikes continue to cripple French refinery operations

    Online Articles

    Wed, 13 Oct 2010

    crippling local refinery operations. While the transportation strikes and others seem to be easing, industrial action is hardening at refineries throughout the country as well as at port terminals. Compagnie Industrielle et Maritime (CIM) at Le Havre

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