• sand control
    Petroleum - English

    Sand Control

      Consequences of sand production: • Wellbore fill. • Equipment problems due to sand fill. • Sand erosion of downhole and surface equipment. • Sand accumulation on surface and Sand Disposal. • Production Loss. • Casing / Liner Collapse. Forces Aiding in Resisting Sand Production: • Intergranular frictional forces and bonding (cementing) help resist grain movement • Capillary Pressure adds further grain-to-grain bonding. Forces Contributing to Sand Production: • Pore pressure relieves frictional forces. • Production of wetting phase reduces capillary pressure forces. What causes sand production? • Totally or weakly unconsolidated formations. • Changing stresses in the near wellbore area. • Water Production. Sand Production Mechanism Primer: – Rock shear collapse owing to in situ…

  • cementing
    Drilling

    Oil Well Cementing Functions, Classes and Equipment

        Functions of cement –  Restriction of fluid movement between permeable zones –  Provision of mechanical support of the casing string –  Protection of casing from corrosion –  Support of the well-bore walls to prevent collapse of formations The manufacture and composition of cement –  Raw material from calcareous and argillaceous rocks (limestone, clay, shale and slag). –  Dry raw materials finely ground and mixed in correction proportions (kiln feed). – Chemical compositions of dry mix determined and adjusted. – Kiln feed fed at a uniform rate in a sloping rotary kiln. – The mixture travels at the lower end. – Powdered coal, fuel oil or gas, fired into the kiln.…

  • casing
    Drilling

    Oil Well Casing

        Types of Casing  Based on the primary function of the casing string, there are five types of casing to be distinguished. Stove or Surface Casing The stovepipe is usually driven to sufficient depth (15–60 ft) to protect loose surface formation and to enable circulation of the drilling fluid. This pipe is sometimes cemented in predrilled holes. Conductor String This string acts as a guide for the remaining casing strings into the hole. The purpose of the conductor string is also to cover unconsolidated formations and to seal off over pressured formations. The conductor string is the first string that is always cemented to the top and equipped with…

  • oilfield
    Petroleum - English

    Oil Well Planning

    How to plan for an Oil Well? Drilling optimization requires detailed engineering in all aspects of oil well planning, drilling implementation, and post-run evaluation Effective well planning optimizes the boundaries, concstraints, learning, nonproductive time, and limits and uses new technologies as well as tried and true methods. Use of decision support packages, which document the reasoning behind the decision-making, is key to shared learning and continuous improvement processes. It is critical to anticipate potential difficulties, to understand their consequences, and to be prepared with contingency plans. Post-run evaluation is required to capture learning. Many of the processes used are the same as used during the well planning phase, but are conducted using new data from the recent drilling…

  • OilWell Drilling Books page.3

    Books about Fishing  Fishing Open hole Download  Drilling , Fishing and Completion Download   Fishing Tools Download   Fishing & Casing Repair – Jim Short – Part.1     Download   Fishing & Casing Repair – Jim Short – Part.2     Download    Oil well Fishing Operations Download Fishing – Pipe Recovery Methods    Download Books about Multilateral Drilling and Horizontal Wells   Horizontal and Multilateral Well Technology Download    Key Issues in Multilateral Drilling Download   Drilling and Completion of Horizontal Wells   1.5 MB Download Drilling and Completion of Horizontal Wells   7.9 MB Download Single Phase and Multiphase Fluid Flow in Horizontal Wells Download Drilling Rig and Associated Services for Horizontal Wells Download…