Abstract: A gate valve can include a valve body and a bore positioned within the valve body, where the bore traverses a width of the valve body and comprises an inlet and an outlet. The gate valve can also include a gate slidably disposed within the bore. The gate valve can further include a seat disposed around the bore and adjacent to the gate and the valve body, where the seat includes a seat body having a spring system and an inner surface, where the inner surface is adjacent to the gate, where the spring system includes a cavity disposed in the seat body and a spring section positioned between the cavity and the inner surface, where the spring section protrudes outward relative to the inner surface, where the spring section is configured to move inward and reduce a volume of the cavity when the gate contacts the spring section.

Abstract: A missile for a hydraulic fracturing system can include a high-pressure (HP) manifold, a low-pressure (LP) manifold, and a main manifold in between. The missile is configured to simultaneously fracture three or more wells. The HP manifold has multiple input channels, an output channel, and a main channel disposed in between. The LP manifold includes a LP input channel, multiple LP output channels, and a LP manifold in between.

Abstract: Dimensions of a tool moving in/out of a well may be measured during well operations. The measured dimensions of the tool may be used to analyze the well operations. Analysis of well operations may include identification of types of well operations being performed at the well, monitoring of the well operations, benchmarking of the well operations, identification of tools being used in the well operations, and/or other analysis of the well operations.

Abstract: A sleeve for protecting a lockdown screw of a wellhead assembly can include a body having an inner surface and an outer surface, wherein the body has a concave curvature, where the body is configured to be disposed within an upper portion of a recess of a component of the wellhead assembly inside of which the lockdown screw is disposed, where the concave curvature of the body is configured to match that of an inner wall of the component, and where the outer surface is configured to isolate the lockdown screw from an environment in a cavity partially formed by the inner surface when the body is disposed in the upper portion of the recess.

Abstract: A tubing spool of a wellhead assembly can include a body having a body cavity, a first channel, and a second channel disposed therein, where the body cavity is configured to receive a tubing hanger used to couple to and suspend a tubing string, where the first channel is configured to be in communication with a tubing string cavity within the tubing string, where the second channel is configured to be in communication with an annulus located between the tubing string and a production casing, and where the first channel and the second channel are each configured to facilitate flow of at least one of a plurality of fluids in either direction independently of each other. The tubing spool can also include a first back pressure valve disposed within the first channel and a second back pressure valve disposed within the second channel.

Abstract: A wellhead housing of a wellhead assembly can include a body having a top end, a bottom end, and a cavity that traverses its length between the top end and the bottom end. The wellhead housing can also include a main channel that traverses the body from the cavity at a distal end of the main channel to an outer perimeter of the body at a proximal end of the main channel, where the proximal end of the main channel is located closer to the top end of the body compared to the distal end of the main channel, and where the distal end of the main channel is located closer to the bottom end of the body compared to the proximal end of the main channel.

Abstract: A tubing spool of a wellhead assembly can include a body having a body cavity, a first channel, and a second channel disposed therein, where the body cavity is configured to receive a tubing hanger used to couple to and suspend a tubing string, where the first channel is configured to be in communication with a tubing string cavity within the tubing string, where the second channel is configured to be in communication with an annulus located between the tubing string and a production casing, and where the first channel and the second channel are each configured to facilitate flow of at least one of a plurality of fluids in either direction independently of each other. The tubing spool can also include a first back pressure valve disposed within the first channel and a second back pressure valve disposed within the second channel.

Abstract: A wellhead bracing system for a subsea well includes a base plate assembly and a wellhead brace assembly. The base plate assembly comprises a top surface, a bottom surface, a base plate aperture, and a plurality of anchor holes. The wellhead brace assembly comprises a vertical plate assembly having a cylindrical shape, a horizontal plate assembly to which the vertical plate assembly is attached, and a vertical support assembly attached to an outer surface of the vertical plate assembly and attached to the top surface of the horizontal plate assembly. Horizontal plate holes of the horizontal plate assembly are configured to attach to studs on the top surface of the base plate to secure the wellhead brace assembly to the base plate assembly. The wellhead bracing system slides onto a wellhead of the subsea well and braces an exterior of the wellhead.

Abstract: A tubing hanger retention system for a wellhead assembly can include a retention ring that is configured to fit over a top portion of a tubing hanger of the wellhead assembly, where the retention ring comprises a plurality of retention ring channels. The tubing hanger retention system can also include multiple retention pin receiving features configured to be disposed, at least in part, within multiple tubing spool channels of a tubing spool. The tubing hanger retention system can further include multiple retention pins configured to be received by the retention pin receiving features, where each retention pin includes an engagement feature configured to be received by a retention pin receiving feature to place the retention pin in a captured state, where the engagement feature of each retention pin is further configured to enter into an engaged state with a retention ring channel when the retention pin is moved inward.

Abstract: A missile for a hydraulic fracturing system can include a high-pressure (HP) missile manifold having a plurality of HP input channels, a HP output channel, and a main HP channel disposed between the plurality of HP input channels and the HP output channel, where each of the plurality of HP input channels is configured to couple to and receive a fracturing fluid from a pump truck, where the HP output channel is configured to couple to and send the fracturing fluid to a main manifold, and where the main HP channel has a widening section along its length that separates a first HP portion of the main HP channel having a first HP diameter and a second HP portion of the main HP channel having a second HP diameter.

Abstract: A system for fracturing multiple wellbores on a multi-well pad can include a missile that receives high-pressure fracturing fluid from a plurality of pump truck. The system can also include a main manifold that receives the high-pressure fracturing fluid from the missile, where the main manifold includes multiple valves and multiple output channels, where each of the valves are operated between an open position and a closed position. The system can further include multiple wellbores including a first wellbore, a second wellbore, and a third wellbore, where the wellbores are connected to the output channels of the main manifold. The valves of the main manifold can be operated to enable simultaneous flow of the high-pressure fracturing fluid to the first wellbore, the second wellbore, and the third wellbore so that the first wellbore, the second wellbore, and the third wellbore are fractured simultaneously.

Abstract: A sleeve for protecting a lockdown screw of a wellhead assembly can include a body having an inner surface and an outer surface, wherein the body has a concave curvature, where the body is configured to be disposed within an upper portion of a recess of a component of the wellhead assembly inside of which the lockdown screw is disposed, where the concave curvature of the body is configured to match that of an inner wall of the component, and where the outer surface is configured to isolate the lockdown screw from an environment in a cavity partially formed by the inner surface when the body is disposed in the upper portion of the recess.

Abstract: Sensors may be located remotely from a rig of a well. The sensors may operate independently of the rig, and generate remote sensor information that characterizes operating characteristics of the well independent of the rig. The operation of the well may be analyzed based on the remote sensor information.

Abstract: A system for fracturing multiple wellbores on a multi-well pad can include a missile that receives high-pressure fracturing fluid from a plurality of pump truck. The system can also include a main manifold that receives the high-pressure fracturing fluid from the missile, where the main manifold includes multiple valves and multiple output channels, where each of the valves are operated between an open position and a closed position. The system can further include multiple wellbores including a first wellbore, a second wellbore, and a third wellbore, where the wellbores are connected to the output channels of the main manifold. The valves of the main manifold can be operated to enable simultaneous flow of the high-pressure fracturing fluid to the first wellbore, the second wellbore, and the third wellbore so that the first wellbore, the second wellbore, and the third wellbore are fractured simultaneously.

Abstract: An offline casing string rotation system can include a ring gear configured to be coupled to a rotatable mandrel casing hanger, where the rotatable mandrel casing hanger is part of a wellhead assembly and is coupled to a top end of a casing string. The offline casing string rotation system can also include a gear driving assembly moveably coupled to the ring gear, wherein the gear driving assembly, when enabled, causes the gear to rotate the rotatable mandrel casing hanger.

Abstract: Dimensions of a tool moving in/out of a well may be measured during well operations. The measured dimensions of the tool may be used to analyze the well operations. Analysis of well operations may include identification of types of well operations being performed at the well, monitoring of the well operations, benchmarking of the well operations, identification of tools being used in the well operations, and/or other analysis of the well operations.

Abstract: Sensors may be located remotely from a rig of a well. The sensors may operate independently of the rig, and generate remote sensor information that characterizes operating characteristics of the well independent of the rig. The operation of the well may be analyzed based on the remote sensor information.

Abstract: A testable back pressure valve can include a housing comprising a housing body. The valve can also include a valve seat coupled to the housing, where the valve seat includes a valve seat body having a first cavity and a second cavity, and where the valve seat further includes a first network of channels disposed in the valve seat body. The valve can further include a valve head movably disposed within the first cavity of the valve seat. The valve can also include a piston follower movably disposed within the second cavity of the valve seat, where the valve head is fixedly coupled to the piston follower. The valve can further include a travel piston movably disposed within the second cavity of the valve seat, where the travel piston is moveably coupled to the piston follower.

Abstract: A testable back pressure valve can include a body. The valve can also include a first flow regulating device movably disposed within a top end of the body, where the first flow regulating device is configured to move from a first default position to a first position based on first flow characteristics of a first fluid that flows into a top end of the body toward a bottom end of the body. The valve can further include a second flow regulating device movably disposed within the bottom end of the body. The valve can also include a network of channels disposed within the body between the first flow regulating device and the second flow regulating device.

Abstract: A multi-well pad for fracturing a subterranean formation can include a valve assembly that includes a shuttle valve, an inlet, a first outlet, and a second outlet, where the inlet is coupled to a fracturing pump, where the first outlet is coupled to a first well, where the second outlet is coupled to a second well, where first shuttle valve has a first position and a second position. The fracturing pump and the first well can form a continuous first path through the valve assembly while closing off a second path between the fracturing pump and the second well when the shuttle valve is in the first position. The fracturing pump and the second well can form a continuous second path through the valve assembly while closing off the first path between the fracturing pump and the first well when the shuttle valve is in the second position.