Methods and compositions for skid-mounted separator assemblies are provided. In some embodiments, the compositions comprise at least one mobile skid, wherein the at least one mobile skid has a first frame and a second frame, and wherein the first frame is hingedly coupled to the second frame. In some embodiments, at least one separator is mounted upon the at least one mobile skid.

A frac tree coupled to a wellhead is connected to either flowback equipment or zipper modules using a single straight-line connection of pipes, valves, and/or frac iron that define a straight-line pathway for fluid, gas, or flowback materials. The disclosed single straight-line connections referenced herein may be used in pressure pumping operations to deliver hydraulic fracturing fluid (frack fluid) to a frac tree for delivery to a wellhead or for carrying flowback from the wellhead to a flowback-collecting equipment. To dramatically reduce the wear-and-tear on the frac tree, blocks at or near the top of the frac trees are strategically lined with a high-strength wear-resistant material internally at points where frack fluid or flowback changes direction to flow toward or away from the single straight-line connections.

An alternative chemical injection path system that includes a conduit and a manifold. The conduit has a first injection point configured at a first distance from a first end of the conduit and a second injection point configured at a second distance from the first end, with the second distance being different than the first distance. The manifold has an inlet and first and second outlets. The inlet is configured for receiving a chemical, while the first outlet is fluidly coupled to the first injection point, and the second outlet is fluidly coupled to the second injection point. The manifold is configured to distribute the chemical to the first injection point and the second injection point according to a location of a clog in the conduit.

An oil and gas configuration is disclosed that creates and uses a single straight-line fluid path between a zipper module and a fracturing (or Christmas) tree. The single straight-line fluid path is created through connecting a series of valves (e.g., manual or automatic gate or plug valves) that coaxially share inner fluid passageways for transporting hydraulic fracturing fluid between the zipper module and the fracturing tree. The hydraulic fracturing fluid flows along the single straight-line fluid path upon from the zipper module to the fracturing tree. The fracturing tree is equipped with a multi-way block that directsthrough one or more internal angled wallsthe hydraulic fracturing fluid downward and toward a wellhead.

An intermitter valve for controlling the flow rate and/or pressure of a fluid produced from a well drilled into an oil and gas reservoir includes several seals between a seat connected to the valve body and a sleeve connected to a reciprocating stem. An O-ring disposed in an inner groove of the sleeve can be used to intermittently form an elastomer-to-metal seal against the seat. An O-ring disposed in an outer groove of the seat can be used to intermittently form an elastomer-to-metal seal against the sleeve. A surface proximate to the end of the sleeve can be used to intermittently form a metal-to-metal seal against a surface of the seat. The seat and the sleeve can be part of a valve kit for converting a production choke valve into a flow shut-off device.

A valve assembly includes a valve body and an opening extending through the valve body along a longitudinal axis. The valve assembly also includes a valve member arranged within the opening, the valve member being movable, along the longitudinal axis, between an open position and a closed position. The valve assembly includes an upper seal positioned to seal against at least a first portion of the valve body. The valve assembly includes a lower seal positioned to seal against at least a second portion of the valve body, wherein both the upper seal and the lower seal travel with the valve member as the valve member moves between the open position and a closed position.

A pressure bleed-off system. The system includes a fluid bypass line having an inlet and an opposing outlet, wherein the inlet is in fluid communication with a high pressure frac line for a hydraulic fracturing operation. The system also includes a high pressure transducer located proximate the fluid inlet, a first plug valve residing along the fluid bypass line, and a first electric actuator residing on the first plug valve. The actuator is configured to rotate the first plug valve between close and open positions in response to command signals from a controller. The controller, in turn, sends the command signals in response to control signals delivered by an operator, remotely. Preferably, the command signals are wireless signals sent from outside of the red zone. The system may also include a second plug valve along the bypass line.

Automated choke control apparatus and methods are disclosed herein. An apparatus for automatically controlling a choke valve comprises a controller. The controller is to control a choke position of the choke valve via a first control loop in response to selection of a first one of a plurality of operation modes being detected. The controller is further to control a wellhead pressure of a wellhead via a second control loop in response to selection of a second one of the plurality of operation modes being detected, the wellhead being operatively coupled to the choke valve.

Apparatus and methods are disclosed for assembling a multi-well fracturing system, and components useful in such a system, and for performing fracturing operations. The multi-well fracturing systems include a movable conduit as a switching member between multiple branches of the fracturing system which extend to different wells within the system. Some such systems may include one or more components placed on adjustable skids to facilitate assembly of the fracturing system.

A choke valve is provided having a body, a seat, and a gate. The body has an internal chamber, an inlet flow passage, and an outlet flow passage. The seat has a seat orifice with an area, the seat positioned at an end of the outlet flow passage contiguous with the internal chamber. The gate has a gate shaft and a gate body affixed to one end of the gate shaft. The gate is linearly translatable within the body between a fully open position and a fully closed position, wherein in the fully closed position the gate body is engaged with the seat orifice. In the fully open position a choke minimum passage area is defined between the gate body and the seat orifice, and the choke minimum passage area is at least 30% of the seat orifice area.