Techniques for separating cuttings from liquid include circulating a drilling fluid that comprises a liquid and formation cuttings to a scree of a screen assembly that includes screen sections; vibrating the screen assembly during circulation of the drilling fluid; while vibrating the screen assembly, separating the liquid from the plurality of formation cuttings; while vibrating the screen assembly, separating a first portion of the formation cuttings of a first size from the drilling fluid with a first screen section; rotating the screen assembly; subsequent to rotating the screen assembly and while vibrating the screen assembly, separating a second portion of the formation cuttings of a second size different than the first size from the drilling fluid with a second screen section; directing the separated liquid through the screen assembly to a liquid outlet; and directing at least one of the first or second portions of the formation cuttings to a cuttings outlet formed in the screen.

A method to recover drill beads from a drilling fluid used in a drilling operation comprising the steps of: directing a drilling fluid containing drill beads into a drill string positioned in a well bore, the drill beads having magnetic properties; recovering the drilling fluid containing at least a portion of the drill beads from the well bore; and magnetically separating the drill beads from the drilling fluid.

A variety of methods and systems are disclosed, including, in one embodiment, a method for emulsion breaking including: applying a trigger to an oilfield emulsion to facilitate breaking of the oilfield emulsion, wherein the oilfield emulsion includes an oleaginous phase, a non-oleaginous phase, and a breakable emulsifier, wherein the trigger breaks the breakable emulsifier into non-emulsifying byproducts; and separating at least a portion of the oleaginous phase from the non-oleaginous phase.

A transportable separation apparatus for separating spent materials from oil and gas operations into a primarily solid component, a primarily liquid component and a primarily gas component. The transportable separation apparatus includes a first separation unit disposed on the transportable separation apparatus for receiving spent materials and beginning separation of the spent materials. The transportable separation apparatus connectable to a vehicle to be pulled on commercial roadways when the transportable separation apparatus is in a transportation configuration. The transportable separation apparatus further includes a second separation unit in fluid communication with the first separation unit for further separation of the spent materials. A method of using the transportable separation apparatus to separate spent materials.

A method comprises controlling an operating pressure of a fluid from a borehole. The fluid comprises solids and entrained gas. The method further comprises removing at least a portion of the entrained gas from the fluid at an upstream location. The method further comprises removing residual entrained gas from the fluid at a downstream location. The method further comprises separating at least a portion of the solids from the fluid. The method further comprises circulating the separated fluid back to the borehole. Separating of solids occurs after the removing of entrained gases from the fluid at the downstream location.

A land-based drilling rig includes a first substructure and a second substructure, the second substructure being positioned generally parallel to the first substructure. The land-based drilling rig also includes a drill rig floor coupled to the first and second substructures, the drill rig floor including a V-door. The side of the drill rig floor has the V-door defining a V-door side of the drill rig floor, where the V-door side of the drill rig floor is parallel to the first substructure. The first and second substructures pivotably support the drill rig floor. The land-based drilling rig also includes a mast, the mast mechanically coupled to one or more of the first substructure, the second substructure, and the drill rig floor. The mast is pivotably coupled to one or more of the first substructure, the second substructure, and the drill rig floor by a mast pivot point. The mast includes a V-door side, the V-door side of the mast parallel to the first or second substructure. In addition, the land-based drilling rig includes a mast hydraulic lift cylinder coupled to the mast at a mast lift point and a choke manifold, the choke manifold positioned on the drill rig floor.

A well fluid treatment system includes a cavitation reactor causing cavitation-induced heating of a flow sufficient to convert at least a portion of water in the well fluid to steam a single pass of the well fluid through the cavitation reactor, a steam-liquid phase separator receives the heated well fluid and separates the flow into steam and a condensed contaminated fluid. One or more auxiliary systems are coupled to the steam outlet and receive the flow of steam in order to transfer thermal energy from the flow of steam to one or more of the following: (a) a well fluid treatment process before the cavitation reactor, and (b) a condensed contaminated fluid treatment process after the cavitation reactor.

There is disclosed a waste treatment process for a fossil-fuel extraction site (18, 40), comprising: processing extracted waste generated by a fossil-fuel extraction process to produce primary waste having a higher calorific value than the extracted waste; mixing the primary waste with secondary waste to generate pyrolysis feedstock, the secondary waste having a lower calorific value than the primary waste; pyrolysing the pyrolysis feedstock in a pyrolysis unit (32) to form pyrolysis char; and gasifying the pyrolysis char in a gasification unit (36) to form syngas and ash.

A method and system treat contaminated water. In one embodiment, the method comprises treating contaminated water by introducing a methylmorpholine-N-oxide solution to a vessel. The vessel contains the contaminated water and iron oxide. The contaminated water comprises contaminants. In addition, the methylmorpholine-N-oxide solution comprises methylmorpholine-N-oxide and water. The method further comprises contacting the methylmorpholine-N-oxide solution with the contaminated water. In addition, the method comprises treating the contaminated water by allowing the methylmorpholine-N-oxide to react with the contaminants in the presence of the iron oxide.

The present invention includes a method of cleaning a membrane contactor comprising: connecting a membrane contactor having a first and a second surface, the membrane contactor being in liquid communication with a first and a second liquid circulation loop; rerouting the source of oil-containing liquid from the membrane contactor; draining the oil-containing liquid in contact with the first surface of the membrane contactor via a drain; circulating a cleaning oil over the first surface of the membrane contactor; pumping a collection fluid over the second surface of the membrane contactor; and contacting the oil-containing liquid with the first surface of the membrane contactor under pressure to maximize oil coalescence at the first surface of the membrane contactor while also circulating the collection fluid over the second surface of the membrane contactor to capture the coalesced oil.