A very light weight, noncompressible drilling fluid including a very light weight hydrocarbon base liquid, and a styrenic butadiene diblock copolymer is heated to achieve excellent rheology including thixotropicity, making an effective drilling fluid with a density of 8 pounds per gallon or less. Densities as low as 4 pounds per gallon are achieved with the addition of glass bubbles. The glass bubbles may, but normally will not, exceed 50% by volume. A method of making the drilling fluid includes passing the light weight liquid and the copolymer through a cavitation device. The invention includes drilling and with and recirculating the fluid to maintain the desired density, viscosity and rheology by adjusting the ingredients accordingly. A method of managed pressure drilling employs the novel fluid, enabling control of drill pressure and physical properties of the fluid including equivalent circulating density.

A very light weight, noncompressible drilling fluid including a very light weight hydrocarbon base liquid, and a styrenic butadiene diblock copolymer is heated to achieve excellent rheology including thixotropicity, making an effective drilling fluid with a density of 8 pounds per gallon or less. Densities as low as 4 pounds per gallon are achieved with the addition of glass bubbles. The glass bubbles may, but normally will not, exceed 50% by volume. A method of making the drilling fluid includes passing the light weight liquid and the copolymer through a cavitation device. The invention includes drilling and with and recirculating the fluid to maintain the desired density, viscosity and rheology by adjusting the ingredients accordingly. A method of managed pressure drilling employs the novel fluid, enabling control of drill pressure and physical properties of the fluid including equivalent circulating density.

A remediation plant for remediating drilling mud, cuttings, and fluids. The preferred plant includes a reboiler that is adapted to provide heat to the drilling mud, cuttings, and fluid, a mud drum that is operatively connected to the reboiler, a distillation column that is operatively connected to the reboiler, a heat exchanger that is operatively connected to the reboiler, a condenser that is operatively connected to the distillation column, a condenser tank that is operatively connected to the condenser, an oil-water separator that is operatively connected to the condenser tank, and a pump that is operatively connected to the oil-water separator. The preferred remediation plant is adapted to remove synthetic drilling fluid from drilling mud, cuttings, and fluids. A method for remediating drilling mud, cuttings, and fluid.

A remediation plant for remediating drilling mud, cuttings, and fluids. The preferred plant includes a reboiler that is adapted to provide heat to the drilling mud, cuttings, and fluid, a mud drum that is operatively connected to the reboiler, a distillation column that is operatively connected to the reboiler, a heat exchanger that is operatively connected to the reboiler, a condenser that is operatively connected to the distillation column, a condenser tank that is operatively connected to the condenser, an oil-water separator that is operatively connected to the condenser tank, and a pump that is operatively connected to the oil-water separator. The preferred remediation plant is adapted to remove synthetic drilling fluid from drilling mud, cuttings, and fluids. A method for remediating drilling mud, cuttings, and fluid.

The invention discloses an organic-inorganic nanocomposite gel sealing agent and oil-based drilling fluid. The sealing agent used for the oil-based drilling fluid is organic-inorganic nanocomposite gel, and the synthetic raw materials of the organic-inorganic nanocomposite gel includes molybdenum disulfide, 2-ethyl acrylic acid, N, N-dimethylacrylamide and N,N-methylene bisacrylamide; the drilling fluid includes the organic-inorganic nanocomposite gel provided by the invention. The organic-inorganic nanocomposite gel is used as a nano sealing agent, the particle size distribution of the organic-inorganic nanocomposite gel is 50-200 nm, the organic-inorganic nanocomposite gel can effectively prevent drilling fluid filtrate from intruding into stratums and prevent accidents such as borehole wall collapse, the organic-inorganic nanocomposite gel is particularly suitable for nano-sealing of shale stratums, and the preparation method of the organic-inorganic nanocomposite gel is reliable in principle and has a wide market prospect.

The invention discloses an organic-inorganic nanocomposite gel sealing agent and oil-based drilling fluid. The sealing agent used for the oil-based drilling fluid is organic-inorganic nanocomposite gel, and the synthetic raw materials of the organic-inorganic nanocomposite gel includes molybdenum disulfide, 2-ethyl acrylic acid, N, N-dimethylacrylamide and N,N-methylene bisacrylamide; the drilling fluid includes the organic-inorganic nanocomposite gel provided by the invention. The organic-inorganic nanocomposite gel is used as a nano sealing agent, the particle size distribution of the organic-inorganic nanocomposite gel is 50-200 nm, the organic-inorganic nanocomposite gel can effectively prevent drilling fluid filtrate from intruding into stratums and prevent accidents such as borehole wall collapse, the organic-inorganic nanocomposite gel is particularly suitable for nano-sealing of shale stratums, and the preparation method of the organic-inorganic nanocomposite gel is reliable in principle and has a wide market prospect.

The invention describes the use of both low-density oxidized polyethylene wax (LDoxPE) and high-density oxidized polyethylene wax (HDoxPE) as rheological additives in oil-based drilling fluids (OBF). This includes both 100% oil and invert emulsion drilling fluids in which the continuous phase is diesel oil, mineral oil, synthetic esters, synthetic olefins, or other organic fluid.

The invention describes the use of both low-density oxidized polyethylene wax (LDoxPE) and high-density oxidized polyethylene wax (HDoxPE) as rheological additives in oil-based drilling fluids (OBF). This includes both 100% oil and invert emulsion drilling fluids in which the continuous phase is diesel oil, mineral oil, synthetic esters, synthetic olefins, or other organic fluid.

Certain invert emulsion treatment fluids for use in subterranean formations are provided. In certain embodiments, the methods comprise: providing an invert emulsion treatment fluid that comprises an oleaginous external phase, and an internal phase that comprises one or more alcohols and one or more polar organic compounds that are soluble in the internal phase; and introducing the treatment fluid into at least a portion of a subterranean formation.

Certain invert emulsion treatment fluids for use in subterranean formations are provided. In certain embodiments, the methods comprise: providing an invert emulsion treatment fluid that comprises an oleaginous external phase, and an internal phase that comprises one or more alcohols and one or more polar organic compounds that are soluble in the internal phase; and introducing the treatment fluid into at least a portion of a subterranean formation.