By slanting or curving wells, it is possible to reach reservoirs under lakes or other environmentally sensitive areas. By turning a full 90 degrees, wells can bore horizontally into formations, greatly increasing productivity by exposing a larger area of the hydrocarbon bearing rock to the well bore.
Drilling at an angle, instead of on the perpendicular, by using a whipstock to bend the pipe until it is going in the desired direction. Directional drilling is used to develop offshore leases, where it is very costly and sometimes impossible to prepare separate sites for every well; to reach oil beneath a building or some other location which cannot be drilled directly; or to control damage or as a last resort when a well has cratered. It is much more expensive than conventional drilling procedures.
The technique of drilling at an angle from the vertical by deflecting the drill bit. Directional wells are often drilled to reach an oil- or gas-bearing reservoir where drilling cannot be done, such as beneath a shipping lane in the ocean. Directional drilling is being used increasingly to intersect reservoirs at angles that exposes more of the rock to the wellbore and increases the amount of oil or gas that flows into the well.
A technique where a well is deliberately drilled on an angle to reach a particular resource.
A technique whereby a well deviates from vertical in order to reach a particular part of a reservoir or to safely drill around well bores in highly congested areas.
Intentional deviation of a wellbore from the vertical to reach target areas laterally displaced from the point where the drill bit enters the earth.
Drilling in a non-vertical direction.
A technique whereby a well is deliberately deviated from the vertical in order to reach a particular part of a reservoir. See deviated well.
Drilling a wellbore at any angle other than vertical; used where the rig cannot be set up directly over the target, or to drill more than one hole from a single location.
Controlled drilling at a specified angle from the vertical.
the method of guiding a well along a predetermined path to a specific target. A directional drilling company provides technology and rig site supervision to efficiently meet directional drilling objectives.
The intentional deviation of a well bore from a vertical position to reach subsurface areas off to one side from the drilling site.
Drilling at an angle instead of vertically is particularly necessary offshore, where multiple wells need to be drilled from a central platform, but with their bottom-hole locations offset considerably in all directions.
n: 1. intentional deviation of a wellbore from the vertical. Although wellbores are normally drilled vertically, it is sometimes necessary or advantageous to drill at an angle from the vertical. Controlled directional drilling makes it possible to reach subsurface areas laterally remote from the point where the bit enters the earth.
intentional deviation of a well from the vertical.
Drilling from a surface laction on a slant, rather than straight down.
Deviated hole drilling. The technique of intentional controlled drilling at an angle from the vertical by deflecting the drill bit. Although wellbores are normally drilled vertically, it is sometimes necessary or advantageous to drill at an angle from the vertical. Controlled directional drilling makes it possible to reach subsurface areas laterally remote from the point where the bit enters the earth. It involves the use of turbodrill, whipstocks, or other deflecting tools.
Directional drilling (sometimes known as slant drilling outside the oil industry) is the science of drilling non-vertical wells. Directional drilling can be broken down into three main groups; Oilfield Directional Drilling, Utility Installation Directional Drilling (commonly known as H.D.D./Horizontal Directional Drilling/Directional boring) and in-seam directional drilling (Coal-Bed methane).
