engineering information technology : drilling

Showing posts with label drilling. Show all posts

Nudging

online engineering degree/engineering degree online/online engineering courses/engineering technology online/engineering courses online/engineering technician degree online/online engineering technology/electronic engineering online

NudgingThe technique of “nudging” is used on platforms in order to “spread out”conductors and surface casings, which minimizes the chance of a collision.Basically, when the hole for surface casing is drilled, some angle is built ata low rate (e.g. 1°/100') in the chosen direction.In addition to “spreading...

Planning The Well Trajectory - Horizontal wells and Allocation of slots to targets

Horizontal wellsFor many applications, the best well profile is one in which the inclinationis built to 90° or even higher.Allocation of slots to targetsEven this is not always a simple task. From a directional driller'sviewpoint, slots on the North East side of the platform or pad should beused for...

Fault Drilling

Fault DrillingDirectional wells are also drilled to avoid drilling a vertical well through asteeply inclined fault plane which could slip and shear the casi...

Inaccessible locations

Inaccessible locationsDirectional wells are often drilled because the surface location directlyabove the reservoir is inaccessible, either because of natural or man-madeobstacl...

Sidetracking

SidetrackingSidetracking out of an existing wellbore is another application ofdirectional drilling. This is done to bypass an obstruction (“fish”) in theoriginal wellbore, to explore the extent of a producing...

Controlling Vertical Wells

Controlling Vertical WellsDirectional techniques are used to “straighten crooked holes”. Whendeviation occurs in a well which is supposed to be vertical, varioustechniques can be used to bring the well...

Relief Wells

Relief WellsDirectional techniques are used to drill relief wells in order to “kill”blowouts. Relief wells are deviated to pass as close as possible to theuncontrolled well. Heavy mud is pumped into the...

Definition of Directional Drilling

Definition of Directional DrillingDirectional drilling can generally be defined as the science of directing awellbore along a predetermined trajectory to intersect a designated subsurfacetarg...

Removal of the Drilling Fluid

Removal of the Drilling FluidFor cementing operations to be successful, all annular spaces must be filled with cement, and the cement properly bonded to the previous casing and formation. In order for this to occur, all the drilling fluid must be displaced by the cement slurry. This is not always an...

Cuttings Slip Velocity

Cuttings Slip VelocityA cutting, traveling up the annulus, experiences a positive upward force due to the drilling fluid velocity, density and viscosity, and a negative downward force due to gravity....

Cuttings Transport

Cuttings TransportOne of the primary functions of a drilling fluid is to bring the drilled cuttings to the surface. Inadequate hole cleaning can lead to a number of problems, including hole fill, packing off, stuck pipe, and excessive hydrostatic pressure. The ability of a drilling fluid to lift cuttings...

Reynolds Number and Critical Velocity

Reynolds Number and Critical VelocityThe Reynolds Number, used in the annular Power Law Model calculations is calculated using equivalent viscosity:Reynolds Number is then:The fluid velocity that will...

Drillstring Pressure Losses

Drillstring Pressure LossesAll pressure losses, at first, assume a laminar flow regime. Power Law Model calculations begin with:where: Plf = Pressure Loss in Laminar Flow (psi)L = Length of Section (feet)VP...

engineering information technology

Source of knowledge Engineering and information technology.

Pages