Managed pressure drilling allows the annular pressure profile to be actively controlled along the well. In conventional drilling, bottomhole pressure is a consequence of mud weight and circulation rate: when the pumps stop, pressure drops. In MPD the annulus is choked, returns are routed through a surface control system, and backpressure becomes a variable that is adjusted in seconds rather than hours.

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We apply conventional, automated and dual-phase MPD, with constant bottomhole pressure and pressurised mud cap as the operating window of the well requires.

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It is the technique of choice when pore pressure and fracture gradient converge, in depleted reservoirs where conventional mud weight causes severe losses, in high pressure and high temperature environments where the window shifts during the operation itself, and in naturally fractured carbonates with a history of total losses.

The package integrates a rotating control device, an automated choke manifold, high-resolution flow measurement, pressure sensors and a real-time control system. The value lies in no single component, but in the integration of hydraulics, measurement, operating limits and control logic for that specific well.

Underbalanced drilling deliberately reverses the pressure relationship between the well and the reservoir. Bottomhole pressure is kept below formation pressure, so the reservoir flows into the well while drilling, rather than the well invading the formation.

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That reversal changes the outcome on four fronts. It reduces formation damage, because without a positive differential there is no invasion of filtrate or solids into the producing zone. It removes the driving force behind loss zones. It provides real-time reservoir information, because the influx during drilling reveals which intervals produce. And it usually improves the rate of penetration by removing the chip hold-down effect at the bottom.

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Depending on reservoir and well conditions, we use liquid gasified with inert gas or natural gas; foam; mist or gas alone; or a light enough liquid without gas injection, in natural underbalanced conditions. The fluid system is determined by the conditions of the well, not by preference.

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The surface system operates as a closed and pressurised circuit: rotating control device, choke manifold, four-phase separation package and gas injection system. Separation is sized by the expected influx, not by the hole diameter.

A well that has stopped producing is not always depleted. In many cases the reservoir still holds potential, and what failed was the completion, the integrity of the casing, or the execution strategy with which it was built.

We carry out workover, rigless operations, coiled tubing drilling and UBCTD, cleanouts and remedials, re-entries and sidetracks from existing wells. We also perform interventions aimed at recovering flow in damaged or partially isolated intervals.

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An existing well is both the advantage and the limit. It avoids drilling again from surface and provides a known path to the reservoir, but it imposes the geometry of the completion, the condition of the casing, diameter restrictions and the tortuosity accumulated over its producing life.

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That is why candidate evaluation starts from the well that exists, not from the well that would be designed today. Before proposing an intervention we review production history, available logs, mechanical integrity and current pressure conditions.

The value we add is technical judgement. Equipment can be sourced and mobilised; what cannot be improvised is knowing which system applies to each well and how to execute it without losing it.

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We take on feasibility studies, conceptual and detailed engineering, design of drilling and intervention programmes, hydraulic modelling, technical and economic evaluation, and execution management.

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We work with a modular scope. The client contracts what is needed: engineering alone, engineering with field supervision, or a fully integrated turnkey solution. Anything beyond our direct capability is covered through alliance with the service company each scope requires, while we retain technical responsibility for the project.

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We also cover contingency design, critical procedures, well integrity assurance and competency development through technical training delivered to operators and service companies in six countries.

POWER ENERGY SERVICES & CONSULTING SOLUTIONS SAS has a variety of geophysical systems for detecting and characterising aquifers, with long-range, high-resolution equipment that examines every soil layer at different depths. The latest-generation technology locates water with great precision, and also characterises the type of water being sought: fresh, natural or saline. It therefore not only detects the presence of water, but identifies its type. We also apply the most advanced techniques available worldwide for quantifying groundwater resources.

"According to studies carried out by the Institute of Hydrology, Meteorology and Environmental Studies, 391 municipalities in Colombia are already exposed to the risk of water scarcity, and the long-term trend indicates that many more will face the same fate." www.worldbank.org

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We drill deep and shallow water wells for human consumption, agricultural, livestock, industrial and mining use.

Against the high cost of building surface reservoirs, drilling wells is relatively economical and can be carried out gradually, expanding capacity as demand grows.

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The environmental impact is minimal, and lower still when drilling with a DTH hammer and compressed air, with no need for drilling mud. That reduces drilling time, site cleanup costs and damage to the formation.

Not all wells are the same. Soil type and groundwater depth determine the appropriate design and drilling method for each case.

A well whose yield has dropped is not necessarily depleted. In most cases the decline is caused by mineral encrustation, clogging of the gravel pack, bacterial growth or deterioration of the screen.

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We provide an integrated service of rehabilitation, maintenance, cleaning and stimulation that restores production capacity and extends the useful life of the well.

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Before intervening we assess the actual condition through logging and pumping tests, to determine whether the problem is recoverable and which method applies. Rehabilitating an existing well usually costs a fraction of drilling a new one.

Groundwater does not always arrive ready for its intended use. Hardness, iron, manganese, sulphides or bacteriological content can make it unsuitable for human consumption, industrial processes or irrigation, even when the yield is as expected.

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We take samples from the producing intervals and determine the levels of minerals and contaminants present, to characterise the water before defining any treatment.

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With that analysis we design and install systems that reduce contaminants to acceptable levels according to the intended use and the applicable regulations. We work on both new installations and existing systems that have stopped performing.

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Treatment is sized from the actual water quality and operating flow, not from typical values.

We design and install the pumping system suited to each well, considering required flow, dynamic water level depth, water quality and power availability on site.

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We install new systems and replace existing equipment operating outside its optimum point, which usually translates into unnecessary energy consumption and premature wear.

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We integrate photovoltaic solar power with electrical submersible pumping, a solution that is particularly effective at isolated sites or where the electricity supply is intermittent or costly.

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We service and maintain all types of pumps, and address low pressure or insufficient yield in systems already installed.

We advise on the technical decisions that define the outcome of a project, before the budget is committed.

In complex wells: candidate selection for managed pressure or underbalanced drilling, operating window assessment, hydraulic modelling and definition of the execution strategy.

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In water and energy: design and implementation of hybrid non-conventional renewable energy systems, combining groundwater aquifers with photovoltaic solar power for urban, rural, industrial and agricultural pumping.

Also the drilling of geothermal wells, which by harnessing the natural energy of the earth saves money and energy and reduces environmental impact.

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Advisory can be contracted independently or as the initial phase of an execution project.

Power Energy Services & Consulting Solutions SAS specialises in well construction and intervention and in field execution performance. If you are looking to make a project more profitable, with greater capacity or fewer incidents, that is the kind of problem we solve.

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Our founder brings more than 30 years of international experience across 11 countries, over 50 pressure-controlled drilling projects and 12 peer-reviewed technical publications with the SPE and the IADC. That knowledge is complemented by a network of allied professionals with a proven record in well services.

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We work in both conventional and renewable energy, and the scope is defined according to what each project requires.

We operate our own equipment with immediate availability: HFW300L hydraulic drilling rig certified to ISO 9001, SGS, CE and RoHS, HF17/18 screw compressor, R780 drill string and a complete set of downhole tools.

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The rig is a patented unit: rotary drive head and hydraulic rotary disc mechanism, hydraulic motors and hydraulic rack feed for deep well drilling. The system allows direct circulation drilling with mud and DTH hammer drilling with compressed air, and can penetrate different soils and formations such as loose layers, sandy and gravel zones, hard rock strata and applications requiring large diameter holes.

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The guide rail runs on its own rolling system, which reduces sliding resistance, lowers friction and extends the service life of the extension guide.

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The rotary drive head adopts a separation mechanism, which makes downhole pipe handling easier during drilling.

Two hydraulic regulation speeds are used for rotation and for pulling or measuring pipe, which adapts the operation to the specific requirements of each location.

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The hydraulic system is fitted with an independent air cooling system for the hydraulic oil, and a water cooler can optionally be installed to ensure continuous, efficient operation under high temperature conditions in different regions of the world.

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The hoist system can efficiently lift downhole parts and tools for drilling.

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The unit is well suited to drilling with compressed air and DTH hammer, using percussion and rotation drilling technology. The stationary screw compression system, trailer mounted and diesel driven, allows both shallow and deep holes to be drilled.

Compressed air and DTH hammer drilling can handle difficult subsurface conditions, such as circulation loss zones and hard formations, without the need for drilling mud. This minimises drilling time, site cleanup cost and, therefore, environmental impact and damage to formations or aquifers.

Drilling, maintenance and stimulation of shallow and deep wells demand high-performance bits, pipe and tools that enable efficient and environmentally responsible drilling across multiple applications.

A multipurpose, lightweight and highly efficient rig, widely used for drilling water wells, monitoring wells and large diameter holes for civil works, among other applications.

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The combination of the pipe elevator and the hydraulic wrench makes making up and breaking out safe, convenient and fast, with lower personnel requirements and greater work efficiency.

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The machine has its own lifting and levelling system. With only two people and the support of the hydraulic winch, the drill string can be assembled and dismantled, which translates into direct savings in labour.

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The four reinforced hydraulic jacks work as an automatic loading system, ensuring easy rotation of the unit and reducing lifting costs.

Every well has its own conditions, and the design must respond to them.

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We locate and characterise aquifers efficiently, to extract water in the shortest time, at the lowest cost and with the least effort. We design the completion to prevent the flow of fine sediments that could damage the aquifer and compromise its permeability.

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Completion design defines the long-term performance of the well. We select the screen type and slot opening from the grain size analysis of the formation, size the gravel pack from that same analysis, and position blank and slotted sections according to the producing intervals identified in the logs.

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Annular isolation and the permanent sanitary seal prevent communication between aquifers and the entry of surface contamination. It is the part of the well that cannot be seen and cannot be corrected afterwards.

We use heavy-gauge PVC where water quality requires protection against chemical attack on metal casing, and we deliver the well with submersible pumping installed and tested.

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In deep wells we use steel or stainless steel casing according to depth, the chemical aggressiveness of the water and formation conditions, with high-power electrical submersible pumping sized for the dynamic head and required flow.

Pumping tests can be carried out in discrete zones at any depth, to collect samples and assess the quality of the aquifer present in the producing intervals.

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Photovoltaic solar pumping is of particular interest in isolated systems. Over the years it has proven an effective supply solution for rural communities, as well as for agricultural irrigation, livestock, mining and industrial applications.

We rent different types of equipment with immediate availability, including hydraulic drilling rigs, compressors, drill strings and downhole tools.

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We also supply electrical generators from 5 KVA to 800 KVA, and primary air compression systems from 175 SCFM to 1,350 SCFM with compressed air receiver tanks.

Rental can be contracted with or without an operator, depending on the scope the client requires and the specific type of operation.

Drilling of conductor holes and surface sections for the oil and gas industry.

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Subsurface services through alliance with specialised companies: directional drilling, cementing, electric logging, wireline, perforating and re-perforating, and gravel packing.

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Well activation through electrical submersible and beam pumping, production testing, stimulation and water control projects.

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Infrastructure projects in flow stations and surface facilities.

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Specialised technical advisory for the implementation of photovoltaic solar and geothermal energy projects.

Training and technical competency development for drilling and intervention teams, with master classes delivered to operators and service companies in six countries.