enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Directional drilling - Wikipedia

    en.wikipedia.org/wiki/Directional_drilling

    Directional drilling (or slant drilling) is the practice of drilling non-vertical bores. It can be broken down into four main groups: oilfield directional drilling, utility installation directional drilling, directional boring (horizontal directional drilling - HDD), and surface in seam (SIS), which horizontally intersects a vertical bore ...

  3. Directional boring - Wikipedia

    en.wikipedia.org/wiki/Directional_boring

    Directional boring, also referred to as horizontal directional drilling (HDD), is a minimal impact trenchless method of installing underground utilities such as pipe, conduit, or cables in a relatively shallow arc or radius along a prescribed underground path using a surface-launched drilling rig. Directional boring offers significant ...

  4. Trenchless technology - Wikipedia

    en.wikipedia.org/wiki/Trenchless_technology

    Trenchless construction includes such construction methods as tunneling, microtunneling (MTM), horizontal directional drilling (HDD) also known as directional boring, pipe ramming (PR), pipe jacking (PJ), moling, horizontal auger boring (HAB) and other methods for the installation of pipelines and cables below the ground with minimal excavation.

  5. Rotary steerable system - Wikipedia

    en.wikipedia.org/wiki/Rotary_steerable_system

    They are generally programmed by the measurement while drilling (MWD) engineer or directional driller who transmits commands using surface equipment (typically using either pressure fluctuations in the mud column or variations in the drill string rotation) which the tool responds to, and gradually steers into the desired direction.

  6. Measurement while drilling - Wikipedia

    en.wikipedia.org/wiki/Measurement_while_drilling

    The primary use of real-time surveys is in directional drilling. For the directional driller to steer the well towards a target zone, he must know where the well is going, and what the effects of his steering efforts are. [citation needed] MWD tools also generally provide toolface measurements to aid in directional drilling using downhole mud ...

  7. Logging while drilling - Wikipedia

    en.wikipedia.org/wiki/Logging_while_drilling

    Logging while drilling (LWD) is a technique of conveying well logging tools into the well borehole downhole as part of the bottom hole assembly (BHA).. Although the terms Measurement while drilling (MWD) and LWD are related, within the context of this section, the term MWD refers to directional-drilling measurements, e.g., for decision support for the smooth operation of the drilling, while ...

  8. Glossary of oilfield jargon - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_oilfield_jargon

    Sliding: In directional drilling, sliding is used to describe a drilling interval in which rotary drilling (i.e., turning the entire drill string) is ceased and a mud motor is engaged to drive the drill bit and provide directional control. Because sliding significantly decreases rate of penetration, increases bit wear, and increases tortuosity ...

  9. Geosteering - Wikipedia

    en.wikipedia.org/wiki/Geosteering

    Geosteering is the optimal placement of a wellbore based on the results of realtime downhole geological and geophysical logging measurements rather than three-dimensional targets in space. The objective is usually to keep a directional wellbore within a hydrocarbon pay zone defined in terms of its resistivity, density or even biostratigraphy.