دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the cover in the well head used to prvent the things dropping into the well after pulling out the tools

n: refer tobottom hole pattem

n: also called rectification, refer to the process of making the borehole or well over the ramps straight and reducing the inclination.

n: deviation of the borehole at least 80. from vertical so that the borehole penetrates a productive formation in a manner parallel to the formation. A single horizontal hole can effectively drain a reservoir and eliminate the need for several vertical boreholes.

n: drilling when the departure of the wellbore from vertical exceeds about 80 degrees. Beause a horizontal well typically penetrates a greater length of the reservoir, it can offer significant improvement over a vertical well.

a well drilled in a manner to reach an angle of 90 degrees relative to a level plane at its departure point at the surface. In practice, the horizontal section of most horizontal wells vary several degrees.

a subsea production tree with a horizontal valve arrangement to the side of the tubing hanger, permitting direct access to the tubing and tubing hanger without having to remove the tree during a workover.

n: a directional well that reaches an inclination of 90 degree

for a strict definition, a 90o deviated well. Actually the well covers a range of “highly” deviated wells (80o to >90o). In the strictest terms, the deviation is measured as 90o from vertical, but tilting bedding planes may make the deviation to the beddi

n: a method of thermal recovery in which water at the boiling point is injected into a formation to lower the viscosity of the oil and allow it to flow more freely toward producing wells. Although generally less effective than steam injection because of lower heat, hot waterflooding may be preferable under certain conditions, such as formation sensitivity to fresh water or high pressures.

n: something that covers or protects, as the casing for a moving mechanical part.

a tertiary recovery operation, consisting of first injecting steam, followed by flowing the well back to recover oil that has had its viscosity reduced by application of the heat.

n: a surge of engine speed to a higher number of revolutions per minute (rpm),followed by a drop to normal speed without manual movement of the throttle. It is often caused by a faulty or improperly adjusted governor.