Drilling Process

1. The Contractor shall mobilize and put into operation all equipment and plants required to undertake the Contract. Mobilization shall include the transferring to the job-sites of all equipment, plants, supplies and materials, personnel, and all items necessary for the execution and completion of the work, and shall also include […]

Borehole development is carried out either by over-pumping or by air-lift pumping and it must achieve a nominal yield of at least 30% greater than the operating yield of the borehole. A borehole must be developed until clear water free of any fine particles is obtained.

Cassing is large diameter pipe that is assembled and inserted into a recently drilled section of a borehole. cassing is set inside the drilled well to protect and support the wellstream.

The borehole development process consists of cleaning the aquifer area in the immediate vicinity of the screen to eliminate drill cutting, drilling fluid and sediment. Borehole development is carried out either by over-pumping or by air-lift pumping and it must achieve a nominal yield of at least 30% greater than […]