Leco Drilling

Water Well Drilling

We use the biggest DTH drilling machine (capable to drill up to 600 meters) in Botswana for deep-well drilling.

The direct DTH drilling method enables us to increase drilling speeds to reach greater depths in most formations.

Borehole Well Casing

Well casing serves as a lining to maintain an open hole from the ground surface to the strong rock. To restrain extension water penetration to the well, it also provides structural support against caving materials outside of the well. Materials that will be used for well casing are steel pipes that are specially designed for the depth of wells and Black steel round tubes standard casing which can be installed in the wells. Joints normally consist of threaded couplings and welds which secure water tightness

Borehole Well screens

Well screens serve two basic functions. First, they support the sides of the hole in unconsolidated or fractured grout thereby preventing collapse. The second keeps sediment out of the well while still offering the largest practical open area in the aquifer to minimize resistance to flow, the materials can be PVC or Steel.

Well Development

Well-development is defined as the treatment of a well by mechanical, chemical or other means for the purpose of removing an underground resistance flow. The term well development is sometimes called groundwater or aquifer development it is the general process of drilling a well to make an aquifer available for water supply.

Pump Testing

LECO Drilling performs pump testing prior to completion of the well to identify the well yield and recovery. The common reasons for pump testing are; To determine the hydraulic characteristics of the aquifer and the regional pattern of the groundwater flow. To investigate the effects of the design abstraction rate on the water level in the aquifer and on rivers and the environment in general. To determine the aquifer loss, well loss and efficiency of the well. To determine the perennial yield of the well and future operational set up the well.

Preparation of reports and Logs

LECO Drilling prepares geophysical study reports and well construction logs following the completion of borehole construction works. These reports and logs help our clients to have a better understanding of the ground specifications and aquifer locations. Not only the aquifer locations but also the key parameters such as well depth, screen locations, pump location, well yield and pump testing results are included in these borehole construction logs.

Hydro Geology Survey

A hydrogeological survey is an investigation of the hydrologic and geologic parameters at the subsurface level in a particular area. Hydrogeological maps may be formulated with the data gathered during such a study. It involves the detailed evaluation of the water bearing levels of rocks and their capability for filtration.

Pump Installation

Pump installation implies various water pumps and related hardware utilized for retrieving water from a borehole, the pipe/hose connections, adaptors, pressure tanks, pits, inspecting fixtures and well seals or covers.

Mine Drilling services

• Dewatering and Ventilation holes.
• Monitoring holes
• Accessing and rehabilitating existing water BH
• Cleaning and developing existing boreholes
• Environmental Boreholes
• Instrumentation Boreholes for piezometer installation for extensometer installation geotechnical monitoring instrumentation

Troubleshooting And Consulting

During the construction of a borehole, drilling engineers may experience problems with difficult to extrat, broken or dropped drilling equipment or a myriad of other unforeseen complications in the process.

• Measurement of relative deformation in the crown pillar
• Enhance understanding and characterization of rate of displacement in the crown pillar
• Analysis of pore water pressure on to the box cut slopes
• Establish a live/early warning monitoring system

LECO DRILLING management team have many years of experience in solving drilling problems. Our engineers are fully trained in all types of drilling techniques, bits and flushes to suit all strata Our Borehole Engineering Services division specialises in troubleshooting just about any borehole-related issue and will even offer a ‘Business Continuity Plan, or ‘Routine Maintenance Plan’ to avoid problems during it life cycle