A method for conducting a wellbore operation includes drilling a wellbore through one or more hydrocarbon bearing subterranean formations with a drill bit arranged at an end of a drill string, wherein an annulus is defined between the drill string and an inner wall of the wellbore. A foam is generated with a foam generator of an annular injection system in communication with the annulus, and the foam is introduced into the annulus with the annular injection system.

A method for conducting a wellbore operation includes drilling a wellbore through one or more hydrocarbon bearing subterranean formations with a drill bit arranged at an end of a drill string, wherein an annulus is defined between the drill string and an inner wall of the wellbore. A foam is generated with a foam generator of an annular injection system in communication with the annulus, and the foam is introduced into the annulus with the annular injection system.

A method comprising: providing a composition comprising: a base liquid; and solid particles; foaming the composition with a gas to produce a foamed drilling fluid; wherein the foamed drilling fluid is characterized as a Pickering foam wherein at least a portion of the solid particles are dispersed on an interface between the base liquid and the gas to stabilize the Pickering foam; pumping the foamed drilling fluid through a drill string; and extending a wellbore through a subterranean formation.

A method comprising: providing a composition comprising: a base liquid; and solid particles; foaming the composition with a gas to produce a foamed drilling fluid; wherein the foamed drilling fluid is characterized as a Pickering foam wherein at least a portion of the solid particles are dispersed on an interface between the base liquid and the gas to stabilize the Pickering foam; pumping the foamed drilling fluid through a drill string; and extending a wellbore through a subterranean formation.

Breaking rock and concrete, based upon a Controlled-Foam Injection or PCF (Penetrating Cone Fracture) uses a high-pressure fluid to pressurize a pre-drilled hole. A high pressure seal is formed between the injection barrel and walls of the pre-drilled hole in the material to be broken. A leak-free poppet valve holds a fluid in a pressure vessel before rapid discharge. Variable charges of foam/water are generated and delivered to the breaker. The injection barrel is prefilled with a low viscosity fluid. An annular reverse acting poppet valve allows concurrent injection of chemical additives and/or micro particles to modify foam viscosity during its high pressure release into the material to be broken. A high pressure foam generator is compact and reliable. Removal and wash-out of the seal frees the injection barrel.

The disclosure discloses a method for obtaining formation parameters of a gas hydrate reservoir through well testing interpretation, which comprises: (1) establishing a physical model for well testing interpretation of the gas hydrate reservoir according to multiphase flow, hydrate dissociation, secondary hydrate formation and heat transfer exhibited in the well testing process of the gas hydrate reservoir; (2) establishing a mathematical model for well testing interpretation of the gas hydrate reservoir; (3) conducting spatial discretization and temporal discretization on the mathematical model, and adopting a finite volume method to obtain a numerical solution of bottom-hole pressure; (4) calculating a bottom-hole pressure variation curve and a production rate variation curve in the well testing process of the hydrate reservoir, and drawing theoretical curves of bottom-hole pressure difference and pressure difference derivative; and (5) matching a measured pressure curve with the theoretical curve to obtain the relevant formation parameters.

The disclosure discloses a method for obtaining formation parameters of a gas hydrate reservoir through well testing interpretation, which comprises: (1) establishing a physical model for well testing interpretation of the gas hydrate reservoir according to multiphase flow, hydrate dissociation, secondary hydrate formation and heat transfer exhibited in the well testing process of the gas hydrate reservoir; (2) establishing a mathematical model for well testing interpretation of the gas hydrate reservoir; (3) conducting spatial discretization and temporal discretization on the mathematical model, and adopting a finite volume method to obtain a numerical solution of bottom-hole pressure; (4) calculating a bottom-hole pressure variation curve and a production rate variation curve in the well testing process of the hydrate reservoir, and drawing theoretical curves of bottom-hole pressure difference and pressure difference derivative; and (5) matching a measured pressure curve with the theoretical curve to obtain the relevant formation parameters.

A method comprising: providing a composition comprising: a base liquid; and solid particles; foaming the composition with a gas to produce a foamed drilling fluid; wherein the foamed drilling fluid is characterized as a Pickering foam wherein at least a portion of the solid particles are dispersed on an interface between the base liquid and the gas to stabilize the Pickering foam; pumping the foamed drilling fluid through a drill string; and extending a wellbore through a subterranean formation.

A method comprising: providing a composition comprising: a base liquid; and solid particles; foaming the composition with a gas to produce a foamed drilling fluid; wherein the foamed drilling fluid is characterized as a Pickering foam wherein at least a portion of the solid particles are dispersed on an interface between the base liquid and the gas to stabilize the Pickering foam; pumping the foamed drilling fluid through a drill string; and extending a wellbore through a subterranean formation.

A method for performing a coiled-tubing process, the method having the steps of performing a coiled-tubing process using a fluid-lubricant composition that includes: a sulfurized component, and a chlorinated component, wherein the sulfurized component is a sulfurized C8 to C14 olefin, wherein the chlorinated component is a chlorinated fatty ester, a chlorinated paraffin, or a chlorinated olefin; and introducing the fluid-lubricant composition into a subterranean wellbore casing.