Abstract: A downhole tool for sealing a well includes a push ring, a first slip ring located adjacent to the push ring, a first wedge located adjacent to the first slip ring and configured to radially push the first slip ring and separate the first slip ring into individual parts, and a sealing element located adjacent to the first wedge and configured to seal the well. An upstream end of the first slip ring and a downstream end of the push ring form a wavy interface when in contact. The wavy interface locks the first slip ring relative to the push ring to prevent a rotation of the first slip ring relative to the push ring.

Abstract: The invention relates to a pneumatically operated drill hammer, comprising a piston and a distributor axially arranged relative to each other in a housing, the piston being arranged to be moved axially between a first position and a second position. The drill hammer further includes a pneumatic drive system, including a drive chamber, a return chamber and a plurality of channels for distribution of drive gas in said drive system. The return chamber is arranged at a lower side of the piston and the drive chamber is arranged at an upper side of the piston, wherein the drive chamber is defined by a variable space enclosed by at least the housing, the piston and the distributor. The drive chamber includes at least one inlet port and at least one exhaust port arranged at a circumference of the drive chamber.

Abstract: A system formed to provide sealed passage through the wellhead for cables, lines, tubes or the like for down-hole applications. A unitary or split/wrap around hanger, packer or other apparatus having a main seal is formed to receive and provide sealed passage through of power and control cables, lines, conduits, or other threaded components having various configurations and applications. A bowl cap, tubing adapter or other surface component with adapters is formed to allow sealed pass-through utilizing a compression seal. A tubing encapsulated wire for pass-through for power cables or the like as well as a compression fitting with right angle connector is configured to provide a seal at the tubing adapter or the like, as well as a two-piece interlocking F.A.N. cover plate utilizing insertable inner plates to provide various cable penetration and other passage layouts, pressure ratings, and other specifications.

Abstract: An isolation valve includes a ball valve element, an actuation section to rotate the ball valve element, and a trigger section that actuates the actuation section in response to a pressure differential. The actuation section includes an actuation mandrel, a piston housing that at least partially encases the actuation mandrel, a collet piston, and a holding collet. The piston housing and the actuation mandrel define a hydraulic chamber, and the collet piston separates the hydraulic chamber into an upper hydraulic chamber and a lower hydraulic chamber. The holding collet supports the collet piston during a stroke of the actuation mandrel that is triggered by the trigger section. The collet piston is configured to assume a rest position on the actuation mandrel before and during the stroke of the actuation mandrel, and the collet piston is configured to disengage from the actuation mandrel after the stroke of the actuation mandrel.

Abstract: A washpipe free feature may include a housing defining a chamber having a bypass portion and a securing portion. The housing has first and second bores to put the bypass portion in fluid communication with an annulus of a wellbore and a central bore of a downhole tubular, respectively. Further, the washpipe free feature includes a magnet secured in the bypass portion, a ferromagnetic ball disposed within the bypass portion, and a piston disposed within the chamber. A distal end of the piston blocks the ball from contacting the magnet in a run-in position such that the ball may plug the first bore in response to fluid flow from the tubular toward the annulus. Additionally, the piston is slideable to an open position such that the magnet may hold the ball out of a flow path between the first bore and the second bore in the bypass portion.

Abstract: The calibration of fracture models for naturally fractured reservoirs using fracture properties from X-ray micro-computed tomography (X-ray MicroCT). A core plug is obtained from a subsurface naturally fractured hydrocarbon reservoir, and a fracture property such as fracture porosity and a fracture effective permeability of the hydrocarbon reservoir are determined. A natural fracture model is generated using reservoir parameters and fluid flow paths, and fracture properties such as fracture porosity and a fracture effective permeability are determined from the natural fracture model. The fracture properties of the natural fracture model are calibrated using the fracture properties from the X-ray MicroCT analysis of the core plug.

Abstract: A method comprises receiving a measurement of a pressure in a subsurface formation at a number of depths in a wellbore formed in the subsurface formation across a sampling depth range of the subsurface formation to generate a number of pressure-depth measurement pairs and partitioning the sampling depth range into a number of fluid depth ranges. The method comprises performing a fitting operation over each of the number of fluid depth ranges to determine a fluid gradient for the type of the reservoir fluid for each of the number of fluid depth ranges. The method comprises generating a solution set of one or more solutions based on the fluid gradient of the reservoir fluid for each of the number of fluid depth ranges determined from performing the fitting operation, wherein each solution defines a partitioning of the sampling depth range and the fluid gradient of each fluid depth range.

Abstract: A system includes a subsurface safety valve and a lock tool. The subsurface safety valve is installed within the production tubing and has a main bore delineated by an inner circumferential surface of the subsurface safety valve and a lock profile machined into the inner circumferential surface of the subsurface safety valve. The lock tool is movably disposed around a conduit and has a locking dog configured to engage with the lock profile of the subsurface safety valve and a conduit seal made of a swellable elastomer. The conduit seal is activated by an activation fluid and has an expanded position and an unexpanded position.

Abstract: A downhole assembly includes a float tool configured to be connected to a casing string and including one or more one-way valves configured to permit fluid flow in a downhole direction and to prevent fluid flow in an uphole direction, and a first wiper plug configured to be deployed into a well via the casing string and engage the float tool. The first wiper plug comprises a valve element that is configured to prevent fluid flow through the first wiper plug at least in the uphole direction.

Abstract: Described herein are systems and techniques for monitoring for monitoring and evaluating conditions associated with a wellbore and wellbore operations that use neural operators instead of computationally intensive iterative differential equations. Such systems and techniques allow for determinations to be made as operations associated with a wellbore are performed. Instead of having to wait for computationally intensive tasks to be performed or take risks of proceeding with a wellbore operation without real-time evaluations being performed, these wellbore operations may be continued while determinations are timely made, thus improving operation of computing systems that perform evaluations and that make decisions regarding safely and efficiently performing wellbore operations such as drilling a wellbore, cementing wellbore casings in place, or injecting fluids into formations of the Earth.

Abstract: A pressurized fluid flow system for percussive mechanisms comprises a cylinder coaxially disposed in between an outer casing and a piston which reciprocates due to the changes in pressure of the pressurized fluid contained inside a front chamber and rear chamber located at opposites sides of the piston. The discharge of fluid from these chambers being conducted through a set of discharge channels and the supply of fluid to the front chamber being conducted through a set of supply channels and a front set of recesses. The supply of fluid to the rear chamber being conducted through a piloted valve.

Abstract: Methods and systems for quantifying and minimizing wellbore breakouts are disclosed. The methods include obtaining a mechanical earth model (MEM), determining a critical collapse pressure (CCP) using an inclination angle and the MEM, and determining an initial mud weight based on the CCP. The methods also include generating a breakout analysis using the initial mud weight, the MEM and a numerical modeling algorithm, updating the inclination angle of the planned wellbore, updating the CCP based on the updated inclination angle and the MEM, and updating the breakout analysis using the initial mud weight, the updated CCP, the MEM, and the numerical modeling algorithm. The methods further include selecting the updated CCP based, on the updated inclination angle that meets the stopping condition, calculating a final mud weight for the planned wellbore based on the updated CCP, and conditioning a drilling mud to the final mud weight, using a mud system.

Abstract: A toe valve for use in a wellbore includes: a tubular mandrel; a housing extending along a periphery of the mandrel; couplings for assembly as part of a casing or liner string; and a valve piston. The valve piston is: disposed in an annulus formed between the housing and the mandrel, movable between an open position and a closed position, and disposed between a valve port of the housing and a valve port of the mandrel in the closed position. The toe valve further includes: an atmospheric chamber for facilitating movement of the valve piston to the open position; a vent port formed through the housing and in fluid communication with the atmospheric chamber; and a flow control device disposed in the vent port and operable to prevent fluid flow from the wellbore into the atmospheric chamber and allow fluid flow from the atmospheric chamber into the wellbore.

Abstract: A fluid sensor, and associated monitoring and control system, employing a cylindrical venturi to eliminate stratification of fluid passing therethrough, and a capacitive sensor operatively coupled with the cylindrical venturi to facilitate the sensing of the fluid while in the venturi.

Abstract: A downhole anchor mechanism for use in downhole tools. The downhole anchor mechanism generally consists of a plurality of sliders that pivot outwardly from a downhole tool body to engage distal ends thereof against a well casing. The sliders are operatively engaged within faceted cavities associated with the tool body, which creates load components that act in a tangential direction, allowing a thin-walled tool body to withstand increased holding force.

Abstract: A method includes creating a chamber within an annulus between a wellbore casing and a drillpipe. An upper boundary of the chamber includes a seal and a lower boundary of the chamber includes a liquid surface and determining a volume of the chamber at a first time. The method further includes determining the volume of the chamber includes measuring, using a pressure gauge, a first pressure within the chamber, changing an amount of a gas in the chamber, and measuring, using the pressure gauge, a second pressure within the chamber. The method further includes determining a first volume of gas within the chamber based on the first and second pressure measurements and the change in the amount of gas, and determining a first fluid level based on the first volume of the chamber.

Abstract: The retrievable packer system includes a packer mandrel, a lock ring, an upper cone, a lower cone, a slip device, a retrieval mandrel, and a slotted retrieval sleeve. The lock ring is attached to the packer mandrel, followed by the upper cone, the slip device, the lower cone, and the retrieval mandrel. The upper connection sleeve and the lower connection sleeve cover the packer mandrel so as to form a chamber in fluid connection with slip flow channels of the slip device. The packer system is run into the borehole with the slotted retrieval sleeve in the first position relative to the lower cone and the slip device in the run-in position. The packer system is set and can be locked at a location in the borehole. The slotted retrieval sleeve can push the upper cone to return the slip device to the run-in position for retrieval of the packer system.

Abstract: A centralizer for a downhole probe disposed within a pipe, the centralizer having a two spaced apart primary tubular members, each with three or more centralizer strip assemblies spaced circumferentially about the wall of the primary tubular member to form seats at each end of each strip assembly. Each seat is disposed to engage a connecting rod assembly extending between the two spaced apart primary members. Each connecting rod assembly has an inner portion and an outer portion, wherein the inner portions of the connecting rod assemblies engage the outer diameter of a probe and the outer portions of the connecting rod assemblies engage the inner diameter of a pipe.

Abstract: A method for cementing a wellbore having a lost circulation zone includes installing a cement basket around a casing string having a casing diameter, and running and setting the casing string in the wellbore. The cement basket is set in proximity of and up hole from the lost circulation zone. The method includes pumping a cement slurry, through the casing string, to a first depth downhole from the cement basket, running a first tubing, having a tubing diameter, into an annulus between the casing string and the wellbore, and pumping the cement slurry, through the first tubing, to a second depth up hole from the cement basket. The tubing diameter is less than the casing diameter.

Abstract: A device for use downhole in a drill string includes a body that is cylindrical. The body has a longitudinal axis and top and bottom threads that can couple the body to other elements of the drill string. A radial shock absorber is coupled to an exterior of the body. The radial shock absorber has a piston with a piston axis. A portion of the piston extends to an exterior of the body. The piston can move along the piston axis between a retracted position and an extended position. In addition, a spring is located between the body and the piston. The spring can bias the piston, along the piston axis, radially outward relative to the longitudinal axis of the body.