The drilling continues along this course diverted until it reaches the desired lateral displacement, then the hole is back to the vertical and placed a string of intermediate casing. Drilling was resumed in the vertical hole and the hole remains vertical until it reaches total depth.
This pattern is used in deep wells in areas in which difficulties with gas, salt water flow, etc. Require the placement of an intermediate pipe, also allows clearer separation of the funds of holes in multi-producing areas.
CHARACTERISTICS OF WELL TYPE «S»
* A shallow LAD.
* A section of construction.
* A section tangent.
* A section of «Fall.»
* Section of construction, and tangent to the vertical drop.
* Section of construction, tangent, loss angle and maintenance.
* Section of construction, tangent and continues to fall through the reservoir.
APPLICATIONS OF WELLS TYPE «S»
* Can be intercepted multiple zones of interest.
* It reduces the angle of intersection in the reservoir.
* These guys are done well when you have limitations with the goal.
* For well spacing requirements.
* When making deep wells with a small horizontal displacement.
DISADVANTAGES OF WELLS TYPE «S»
* Increased torque and drag.
* Risk of key eye formation (Keyseating).
* Risk of channel formation.