Before drilling a well, our geologists and engineers complete a full analysis of the geology using proprietary and public data. They assess results from other wells drilled in the vicinity, including water wells, producing oil and gas wells and non-producing wells (dry wells). A plan is developed for drilling and completing the well that must be approved by regulators. The company proactively engages key stakeholders including government agencies, regulators, and environmental consultants, as we develop these plans.
Culbreath Oil & Gas operates over a hundred wells domestically and, each year, drills dozens more. Ensuring well integrity is essential for environmentally sound, safe production of oil and natural gas.
Drilling and Extracting
Culbreath Oil & Gas specializes in vertical drilling. Various completion techniques, such as hydraulic fracturing – also referred to as fracking – are then used to create an effective connection between the well and the targeted hydrocarbon-containing formation, thereby providing a pathway for oil and gas to be produced.
Following the construction of a well pad, a large hole is drilled to a shallow depth. A relatively short length (typically 40 to 120 feet) of large-diameter steel pipe, known as conductor casing, is set to stabilize the ground at the top of the well.
Drilling continues to a predetermined depth below the base of usable water. This depth is specified by regulators for the purpose of protecting potential usable groundwater resources and is based on local geology. While drilling this section, drilling mud – a mixture of fresh water and clay – is pumped into the hole to cool the drill bit, remove any cuttings and create a boundary between the well and surrounding rock.
The drill pipe and drill bit are removed, and a steel casing is inserted. Cement is pumped through the casing, filling the annular space between the outside of the casing and the wellbore. This creates a sealed container that extends from the surface to below the base of freshwater zones. The blowout preventer is then installed at the surface.