• How to Carryout Primary Well Control While Drilling

    Definition of Primary Well Control: This is the name given to the process that maintains hydrostatic pressure in a well bore greater than the formation fluid pressure but less than fracture pressure. If hydrostatic pressure is less than formation pressure then unwanted formation fluids will enter the well bore. If the hydrostatic pressure of the […]

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  • How to Supervise deep Water Borehole Drilling

    The aim of supervising borehole drilling is to ensure that boreholes are constructed according designed and all the data collected during the drilling are accurately recorded and reported to the relevant agencies. Good supervision is essential for a high-quality borehole, even if a competent Driller is employed. Without good supervision, the quality of the work […]

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  • Rotary Drilling of Water borehole problems and Solutions

    Some problems in rotary drilling are minor and others are serious and can result in failure to complete a hole or even loss of equipment. Many serious problems start minor but can become serious if not recognized or handled properly. For example, in a loose sand zone, the borehole walls can casts of particles and cause […]

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  • How to Interpret Water Borehole Pumping Test

    There are several ways of analyzing pumping test data, (The table below show the commonly used methods for pumping-test data analysis). SN Type of Aquifer Type of Pumping test data Names of methods 1 Confine Aquifer I. Time Drawdowndata II. Unsteady distance drawdown data III. Quasi-Steady/ Steady Distance drawdown data IV. Recovery Data: – Time […]

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  • How to Perform Water Borehole Pumping Test

    Pumping tests or aquifer performance tests is a field experiment in which a well is pumped at a controlled rate and water-level response (drawdown) is measured in one or more surrounding observation wells and optionally in the pumped well (control well) itself. The way in which the water levels respond to the pumping is then […]

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  • How to Drill and Construct Deep Water Borehole

    After Drill-Rig Setup, connect the discharge piping. Depending on the type of drilling operation, connect either the air compressor or the mud pump to the standpipe on the mast. Before you start drilling, you must select a drill bit. Consider the well diameter and the type of formations you will drill through. The types of […]

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