Cathedral Energy Services Ltd - drilling

By: Cathedral Energy Services  09-12-2011
Keywords: Energy Services, Directional Drilling, Measurement While Drilling

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Horizontal and Directional Drilling vs. Conventional Drilling

Horizontal drilling involves drilling a lateral horizontally off of the vertical wellbore. Directional drilling is the controlled drilling of a wellbore to a prescribed bottom hole location. Both horizontal and directional drilling require the use of downhole mud motors (powered hydraulically by drilling fluid to allow for rotation of the drill bit with little or no rotation of the drill string) to alter the course of a wellbore to hit a specified drilling target. Horizontal and directional drilling operations require two distinct systems to steer the drill bit below the earth's surface to a predetermined target: a positive-displacement downhole mud motor and measurement while drilling ("MWD") technology.

Horizontal and Directional Drilling

When drilling a vertical well, the wellbore is drilled straight down until the oil or natural gas reservoir is reached. Vertical drilling is most efficient when reservoir pressure is high and the formation has high permeability. Conventional drilling is not always the most economic approach given factors such as restricted surface access, geology, reservoir pressure and present value considerations. Horizontal and directional drilling does not compete with or take the place of conventional vertical drilling rig operations. By virtue of the increased productivity and economics associated with horizontal and directional drilling techniques, conventional drill rig utilization levels are actually enhanced.

Benefits of Horizontal and Directional Drilling

  • Improved access:
    The use of horizontal and directional drilling equipment allows for access to previously unattainable bottom hole targets. In addition, horizontal and directional drilling is used when the specific subsurface target is not accessible using conventional vertical drilling practices; for example, when the desired target zone is located directly beneath an extremely complex surface obstacle, such as a mountain, lake, town or environmentally sensitive area.
  • Increased economic performance:
    Horizontal and directional drilling results in a significant advantage over conventional drilling in environments with low permeability or in situations where producers want to accelerate production from a reservoir. In both cases, increased production is achieved through the increased exposure of the reserves to the producing wellbore. As a result, a well’s net present value is increased due to the more efficient production of available reserves.

Remote Drilling System

Remote drilling has provided cost savings on many of our drilling projects, to learn more:

Engineering and Well Planning

The Cathedral Energy Services Engineering and Well Planning team's main goal is to build the most cost effective and reliable wells. Our focus is to satisfy, in the best way possible, our customer’s needs. Cathedral's drilling engineering team has the expertise, experience, technology (software) and knowledge to design the most optimum well trajectories, taking into consideration all operational and government constraints.

Our engineering and well planning team can assist with:

  • Wellbore Trajectory Design
  • Bottom Hole Assembly ("BHA") Analysis
  • Torque and Drag Analysis
  • Hydraulics
  • Surface Location Optimization Placement
  • Web Access

Keywords: Conventional Drilling, Directional Drilling, Energy Services, Measurement While, Measurement While Drilling, mud motor, Well Planning, While Drilling

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