A Reliable Partner For Other Drilling Applications
HORIZONTAL DIRECTIONAL DRILLING:
HDD is used to install:
pipelines and conduits underground, no surface disruption (alternative to trenching)
crossings under a vast range of surface obstacles.
It was developed in the 1970s combining techniques used in conventional road boring and those used in oil and gas directional drilling. This method is currently used to install pipelines for oil, water, natural gas and waste water as well as conduits for power and fiber optic cables. The main objective is to install such services without using traditional trenching methods, helping to avoid any unnecessary environmental impact and provide added security.
Less invasive than the traditional open cut
Requires a relatively short set up time
Surface disruption is minimized
More secure than above ground or trenched installations
Deep installations and avoid surface obstacles (rivers, railways, or highways)
It is the removal of sample formation material from a wellbore. To the extent possible, core samples are taken in an undamaged, physically unaltered state. The formation material may be solid rock, friable rock, conglomerates, unconsolidated sands, coal, shales, gumbos or clays. Coring can be conducted by various methods with a variety of tools. But in the oilfield, coring is generally accomplished by two methods:
Full hole coring: core material ranging in diameter from 1 ¾" to 5 ¼" is recovered inside of a core barrel in vertical, deviated, horizontal, or sidetracked wells. Depending upon the coring system employed, the core can be recovered in preserved or unpreserved states, and can be used for a wide range of analytical applications.
Sidewall Coring: cylindrical plug-shaped samples, generally 1" in diameter, are recovered from the walls of the wellbore by percussion or rotary coring techniques. This sampling takes place in the first few inches of the wellbore wall in regions that generally are invaded by drilling fluid filtrates. The resulting samples are unpreserved and frequently are damaged by the recovery procedure. Sidewall core plus are of limited use from an analytical standpoint.
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