Abstract: A rotation device includes a base seat, an axle unit, a lower rotating module and an upper rotating module. The axle unit includes an upper axle and a lower axle. The lower rotating module includes a lock unit, and an outer barrel that is disposed in the base seat and that is penetrated by the lower axle. The lock unit includes a lock plate that is sleeved on the lower axle, and a lock member that is mounted to the base seat. The lock plate is formed with a first lock groove. The lock member has a lock portion that is operable to move into the first lock groove. The upper rotating module is disposed in the base seat and is co-rotatably sleeved on the upper axle. The upper rotating module is able to be driven by the upper axle to rotate relative to the lower rotating module.

Abstract: A pipe standing adapter is a device designed for placement on a round pipe to create a flat surface. An interrupting flange, offset from a center and extending parallel to a length of a pipe (between locations about semi-circular openings for a pipe) is on the otherwise flat surface designed for a base of a ladder to be abutted there-against. An acutely angled ladder can then be placed against the interrupting flange and a worker can climb down the ladder safely on to the platform which rests on the pipe.

Abstract: The invention relates to a tool (11) comprising a base element (2), which is a single-piece cast structure made of cast iron and comprising studs (3, 4) provided on the base element (2) by welding. The invention further relates to a method for forming such a tool and to the use of such a tool for forming secant walls.

Abstract: Systems and methods for monitoring and control in downhole well applications are provided. The system and methodology may be combined with a variety of completions or other types of well equipment deployed downhole to enable both electrical and fiber optic communication with downhole components. For example, the system enables both electrical and fiber optic communication for operating and monitoring of downhole completion systems or other systems.

Abstract: A wireline tool connection comprising a wireline top sub and a tandem sub; wherein the wireline top sub further comprises a first pin end, a first box end, wherein the first box end further comprises an internal threads, and a bore that extends from the first pin end partially through the body of the wireline top sub. The tandem sub further comprises threads, an electric feedthrough, and a pressure barrier. The tandem sub and wireline top sub are connected via the threads of the tandem sub and the internal threads of the wireline top sub.

Abstract: Systems and methods for installing a coiled tubing pumping system in a well permit the use of a standard wellhead. A method for installing the coiled tubing pumping system includes the steps of connecting a continuous length of coiled tubing to the coiled tubing pumping system, lowering the coiled tubing pumping system and coiled tubing into the production tubing, and temporarily supporting the weight of the coiled tubing pumping system with an installation kit. The method continues with the steps of cutting the continuous length of coiled tubing to form a coiled tubing segment attached to the coiled tubing pumping system, attaching a deployment assembly to an upper end of the coiled tubing segment connected to the coiled tubing pumping system, and lowering the deployment assembly, the coiled tubing segment and the coiled tubing pumping system into the well until the deployment assembly lands on the seating element.

Abstract: Systems and methods for detecting a formation fluid kick in a wellbore include drilling into a subsurface formation using a drill string including a pup joint. Measuring properties of a drilling fluid inside of the drill string at the pup joint using a first sensor module and measuring properties of the drilling fluid outside of the drill string at the pup joint using a second sensor module. Analyzing the measured properties of the drilling fluid inside and outside of the drill string at the pup joint including calculating a difference between the properties of the drilling fluid inside and outside of the drill string at the pup joint. Determining an occurrence of the kick based on the difference between the properties of the drilling fluid inside and outside of the drill string at the pup joint exceeding a pre-determined threshold value.

Abstract: A method may include receiving real-time data relating to drilling fluid for drilling operations that utilize a drilling fluid system that includes tanks and pumps, where the drilling operations include operations that pump the drilling fluid to a drill bit on a drillstring that rotates to extend a borehole in a formation, and where the drilling fluid flows to an annulus between the drillstring and the formation to apply pressure to the formation; detecting a tank state from a group of tank states based at least in part on the real-time data, where the group of tank states includes tank states defined with respect to one or more operations of the pumps; and detecting a change in tank volume, based at least in part on the tank state, as an indicator of an undesirable interaction between the drilling fluid and the formation

Abstract: One or more geometric dimensions of a portion of a washout section of a wellbore are determined. A retrievable tubular sleeve is run downhole through the casing string, such that a key profile disposed on an outer surface of the retrievable tubular sleeve connects with a landing nipple disposed on an inner surface of the casing string. The retrievable tubular sleeve is dimensioned such that, when the key profile is connected with the landing nipple, a portion of the retrievable tubular sleeve extends downhole from the downhole end of the casing string and within the portion of the washout section for which the one or more geometric dimensions have been determined, and an intervention or measurement tool can be run through the retrievable tubular sleeve through across the washout section.

Abstract: A configurable coupling assembly includes a body having a central bore and multiple receptacles. The central bore is configured to facilitate flow of fluid through the body, the receptacles are positioned radially outward from the central bore, the receptacles are substantially the same as one another, the receptacles are configured to receive respective couplers, and the respective couplers include multiple different types of couplers.

Abstract: A wellbore intervention system for repairing a wall failure within a wellbore includes a fluid conduit installed to an outer surface of a casing string within the wellbore. The fluid conduit includes a tube to which a remedial substance is delivered, multiple ports arranged along a length of the tube for communicating the remedial substance to the wall failure in a cement region along the wellbore, and a one-way valve for preventing a reservoir fluid at the wall failure from flowing in an uphole direction through the tube.

Abstract: A downhole tool, which includes a tool housing having a longitudinal axis, is equipped with a sting for punching a hole in a casing wall and injecting a sealant through the hole. The tube has a fluid channel to establish fluid communication from within the tool housing to an exterior of the tool housing through the fluid channel. A press device acts on the sting to force the sting in a radially outward direction from the tool housing. A check valve is arranged in the fluid channel, which allows fluid communication in a direction from within the tool housing to an exterior of the tool housing and which blocks fluid flow in an opposite direction. In use, the sting can perforate a casing wall and the sealant can be injected into an annular space around the casing.

Abstract: A wellbore assembly includes a wellbore string disposed within a wellbore and a cement retainer coupled to a downhole end of the wellbore string. The cement retainer includes a housing, a packer, a valve, and a sleeve. The housing includes one or more fluid ports extending from an interior surface of the housing to the annulus. The housing defines a first fluid pathway extending from within the wellbore string to within the housing. The sleeve is movable between a first position, in which the sleeve blocks the one or more fluid ports, and a second position in which the sleeve exposes the one or more fluid ports to open a second fluid pathway extending from the annulus, through the one or more fluid ports, to the first fluid pathway. Opening the second fluid pathway allows mixing of a first fluid with a second fluid in the cement retainer.

Abstract: Described herein are embodiments of apparatuses and methods that include an annular flow lubricator. In an exemplary embodiment, the annular flow lubricator includes a body housing an internal flow tube such that well flow enters a lower portion of the internal flow tube, travels up the internal flow tube, and exits an upper portion of the internal flow tube. Upon exiting the upper portion of the internal flow tube, well flow then travels in an annulus between the body of the lubricator and a wall of the internal flow tube before exiting an outlet port of the lubricator.

Abstract: A control system can include a controller that includes an interface for receipt of sensor data generated by sensors operatively coupled to a fluid flow system; memory that includes sets of tuning parameter values; and a loader that loads a selected set of the sets of tuning parameter values into the controller for issuance of control signals to a choke valve actuator for a choke valve of the fluid flow system according to the selected set of tuning parameter values and sensor data generated by one or more of the sensors.

Abstract: Provided is a float for use with a fluid flow control device, a fluid flow control device, a method for manufacturing a float, and a well system. The float, in one aspect, includes a fluid tight enclosure. The float, according to this aspect, further includes density specific material located within the fluid tight enclosure, the fluid tight enclosure and the density specific material creating a net density for the float that is between a first density of a desired fluid and a second density of an undesired fluid, such that the float may control fluid flow through a flow control device when encountering the desired fluid or the undesired fluid.

Abstract: Provided is a subsurface safety valve (SSSV), a well system, and a method. The subsurface safety valve (SSSV), in one aspect, includes an outer housing, a valve closure mechanism coupled to the outer housing, and a bore flow management actuator disposed in the central bore, the bore flow management actuator configured to slide from a first state to a second state to move the valve closure mechanism between a closed state and an open state. The subsurface safety valve (SSSV), in this aspect, additionally includes an electromagnet positioned at: 1) a first location, the first location in the outer housing proximate where the bore flow management actuator resides when the bore flow management actuator is in the second state; or 2) a second location, the second location coupled proximate a downhole end of the bore flow management actuator.

Abstract: The present invention provides a tool assembly system for use in a single trip downhole operation in which an alloy plug/seal is set and then at least partially milled through. The system comprises a tubular chemical heater with a mill that has at least one flow port and a tubular mandrel arranged on the outside of the heater at up-hole and down-holes ends of the heater respectively and whereby the heater is removably retained within the mandrel so that the mill can be subsequently repositioned to work on the mandrel once the alloy plug/seal has been formed. The present invention also provides an associated method of forming an alloy plug/seal and milling it at least partially through in a single trip.

Abstract: A tool for suspending in a well retrieves various metal debris from the well, and includes an elongated tool body with a plurality of magnets included in a plurality longitudinal ridges which are circumferentially spaced. In the method a plurality of magnets can be positioned within openings, recesses, or pockets in each ridge, and held in place by one or more retaining plates, the tool being connected to a drill string and lowered into a well.

Abstract: A device for generating pressure waves in a well or a wellbore is described. The device includes a housing containing an impact-generating mechanism for generating the pressure waves and a connector for connecting the housing to a conveyor for transporting the device to any desired location within the well or the wellbore. The device may be used for a number of downhole applications such as cleaning perforations, fracturing processes, vibration of a casing to prevent fluid flow in a cemented annulus, hydraulic jar operations for freeing stuck downhole objects, generating data to optimize pumping parameters and as an enhancement to percussion drilling techniques.

Abstract: Provided is a multilateral junction and a well system. The multilateral junction, in one aspect, includes a housing, the housing including a first housing end and a second housing end, a bore extending through the housing from the first housing end to the second housing end, and a toothed coupling profile located along an inside surface of the bore proximate the second housing end. The multilateral junction, according to this aspect, further includes a multilateral bore leg extending into the bore, the multilateral bore leg including a tubular having a first tubular end and a second tubular end. The multilateral junction, according to this aspect, further includes a toothed coupling located between the bore and the tubular and engaged with the toothed coupling profile and the tubular to axially fix the housing and the multilateral bore leg relative to one another.

Abstract: Provided is a multilateral junction and a well system. The multilateral junction, in one aspect, includes a housing, the housing including a first housing end and a second housing end, a bore extending through the housing from the first housing end to the second housing end, and a bore coupling profile located along an inside surface of the bore proximate the second housing end. The multilateral junction, according to this aspect, further includes a multilateral bore leg extending into the bore, the multilateral bore leg including a tubular having a first tubular end and a second tubular end, and a tubular coupling profile located along an outside surface of the tubular proximate the first tubular end. The multilateral junction, according to this aspect, further includes an arced coupling located between the bore and the tubular and engaged with the bore coupling profile and the tubular coupling profile.

Abstract: The present invention provides a mixed injection fluid and a corresponding method for enhancing CO2 sequestration and oil recovery, which is a method of the geothermal driven CO2 catalytic reduction for enhancing CO2 sequestration and oil recovery. In the present invention, a technical solution of the liquid nitrogen fracturing, an injection fluid injection, and the catalysis transportation and storage were adopted, which makes full use of the thermal energy of deep geothermal reservoir in combination with nano-Cu-based catalysts to activate the hydrothermal cracking reaction of crude oil and CO2 thermal reduction reaction, so to simultaneously enhance crude oil recovery and CO2 sequestration, fundamentally solving the existing problems of CO2-EOR technologies. Moreover, CO2 thermal catalytic reduction products can also work as a surfactant to accelerate the desorption crude oil from the rock surface and decrease the interfacial tension, and finally EOR.

Abstract: Methods are provided for sequestering a pollutant gas of carbon dioxide (CO2) gas and/or hydrogen sulfide (H2S) gas in a subterranean reservoir. In one method, a carrier gas containing pollutant-sorbent particles (e.g., nanoparticles) is pumped into the subterranean reservoir, the pollutant-sorbent particles attach to the subterranean reservoir, the pollutant gas is pumped into the subterranean reservoir, and the pollutant-sorbent particles attached to the subterranean reservoir adsorb the pollutant gas. In another method, pollutant gas is introduced into a carrier liquid containing pollutant-sorbent particles to produce a pollutant-rich carrier liquid, the pollutant-rich carrier liquid is pumped into the subterranean reservoir, and the pollutant-rich carrier liquid is allowed to remain in the subterranean reservoir.

Abstract: A downhole acoustic stimulation tool comprises: a sealed chamber containing a liquid; a pair of electrodes located in the chamber; at least one transducer arranged to generate an acoustic field between the electrodes thereby inducing cavitation in a volume of the liquid between the electrodes; and at least one capacitor configured to apply a pulse voltage across the electrodes when discharged, thereby causing the cavitating volume of liquid to form a plasma which collapses to form a shockwave. The at least one transducer constitutes a first energy source, and the at least one capacitor back and electrodes constitute a second energy source. Alternative forms and arrangements of the first and second energy sources are also disclosed.

Abstract: Electrolysis devices and systems include a first plate having first and second outlets; a first screen extending below the first plate proximate to the first outlet wherein a inner diameter of the first screen?an inner diameter of the first outlet; a tube extending below the first plate wherein the tube is disposed around the first screen with a first gap between the first screen and the tube; a second screen extending below the first plate such that the second screen is disposed around the tube with a second gap between the tube and the second screen; the second outlet is either disposed between the tube and the second screen or outside of the second screen; and wherein a length of the first screen is less that a length of the second screen, and a length of the tube is greater than the length of the second screen.

Abstract: Disclosed embodiments may describe a jacket. The jacket includes a back wall, top wall, bottom wall, and first and second sidewalls extending from the back wall and between the top and bottom walls. An internal cavity of the jacket is defined by the back wall, the top wall, the bottom wall, and the sidewalls. A slotted shaped charge housed in the internal cavity is retained by a retention latch that extends from an internal surface of at least one of the top wall, the bottom wall, the first and second sidewalls. The jacket may be positioned in a shaped charge receptacle formed in a shaped charge carrier. An orientation slot or tab may be formed into a peripheral edge portion of the receptacle, and a key may be configured for being received within the orientation slot.

Abstract: A tool string includes a perforating gun, a first electrical connector defining a receptacle and includes a first electrical contact positioned in the receptacle, and a sub including a sub housing including first end, a second end opposite the first end, and a central passage extending between the first end and the second end, and a bulkhead connector positionable in the central passage to form a pressure barrier along the central passage, the bulkhead connector including an outer housing defining a radially outer periphery of the bulkhead connector, and a second electrical contact positioned along the outer periphery of the bulkhead connector and configured to establish radially directed electrical contact with the first electrical contact of the first electrical connector irrespective of the angular orientation of the second electrical contact relative to the first electrical contact.

Abstract: In one example, a method includes running a downhole system into a downhole environment that comprises a wellbore, and the downhole system is configured such that a reusable plug of the downhole system is positioned uphole of a perforation gun of the downhole system, then, with the perforation gun, perforating a casing at a stage of the wellbore, and the perforating is performed using a projectile, and the perforating is performed by firing the projectile from a chamber of the perforation gun.

Abstract: A flow control system for use in controlling flow of a fluid composition in a subterranean well is disclosed. The flow control system includes a flow chamber that includes an inlet and an outlet oriented such that the fluid composition flows circuitously through the chamber, forming a vortex at least at the outlet. The flow control system further comprises at least one flow control structure shaped and positioned in the flow chamber such that a velocity of the circuitous flow is reduced and the vortex is eliminated or substantially reduced.

Abstract: A flow assurance digital avatar is provided that combines the simulation of fluid flow through a network of oilfield facilities including reservoirs, wells and pipelines, detection and visualization of possible flow-related issues and risks in the network of oilfield facilities, user evaluation of possible optimizations (what-if scenarios) in the operation of the network of oilfield facilities for fixes and workovers with respect to flow-related issues and risks, and user evaluation and management of possible tasks or actions for the fixes and workovers for the flow-related issues and risks. Other aspects are described and claimed.

Abstract: Systems and methods include a computer-implemented system. Measurement tools provide real-time measurements for wells and reservoir performance. Control valves are automatically controlled in response to events occurring in the wells. A network provide s communications between the measurement tools, the control valves, and command centers. The command centers provide information to reservoir and production engineers monitoring the group of wells. A technical reservoir and production engineering domain monitors performance indicators for the reservoir and group of wells for events requiring corrective action to be taken.

Abstract: An improved pump device and control system for removal of liquid, such as viscous leachate, from a bore. A pump device includes a casing with an inlet check valve on a lower portion thereof and a discharge check valve on an upper portion thereof positioned within the casing. A fill cavity within the casing is connectable to a source of pressurized gas. As liquid/viscous leachate accumulates within the bore it enters the fill cavity through the inlet check valve. As pressurized gas is introduced to the fill cavity it displaces liquid/leachate from the fill cavity into and through a discharge tube and upward through the discharge check valve to remove the liquid/leachate from the fill cavity. The pump does not comprise a float. Control systems and devices provide for improved automated, semi-automated, and manual monitoring and control of pump device operation.

Abstract: A method for improved borehole completion. In one embodiment, the method comprises removing a section of casing entirely and cutting a notch through the cement and into the surrounding rock formation, said notch optimally comprising a symmetric triangle terminating in a sharp point oriented perpendicular to the casing axis. Flow may be further optimized by extending the notch as far as practical into the rock matrix to increase the effective diameter of the wellbore and increase the length of the intersection between the fracture and the wellbore.

Abstract: A system for hydraulic fracturing in a shale layer of a geological formation is described. The system includes a borehole which extends between surface of geological formation and shale layer, and a horizontal fracturing pipe which extends perpendicularly from borehole into the shale layer. The horizontal fracturing pipe includes a number of periodic perforations. The system includes a pump and a fracturing fluid to be injected by the pump into borehole and horizontal fracturing pipe. The fracturing fluid is injected through periodic perforations and stimulates fractures in shale layer. The system includes a pressure sensor and a fluid meter. The pressure sensor measures pressure of fracturing fluid in horizontal fracturing pipe. A computing device determines the spacing distance of the perforations based on a percentage of interference between the perforation and a net present value of production.

Abstract: Systems, methods, and devices are provided for a turbine driven pump gearbox. A turbine engine may drive a primary shaft having gears. The gears may selectably engage with gears of a secondary shaft that drives a machine (e.g., pump). By changing which gears of the primary shaft engage with which gears of the secondary shaft, a gear ratio may be changed. A power takeoff device (e.g., a generator) may be connected to the primary shaft and may be operated in reverse as a motor to rotate, slow, stop, and/or reverse rotation of the primary shaft. Brakes may be associated with one or more of the primary and secondary shafts. The power takeoff device and one or more of the brakes may be controlled to shift engagement of the shafts between different positions, changing the gear ratio and/or disengaging the shafts from each other.

Abstract: A hydraulic fracturing system includes a plurality of pumps positioned at a wellsite and configured to pressurize a fracturing fluid, a distribution system fluidly coupled to receive and consolidate fracturing fluid from the plurality of pumps for injection into a wellhead. The hydraulic fracturing system further includes a control system, which includes a plurality of sensing devices configured to measure one or more parameters of the plurality of pumps and the distribution system, one or more processing device configured to receive and analyze the one or more parameters measured by the plurality of sensing devices and generate control instructions based at least in part on the one or more parameters, and one or more control device configured 110 to receive the control instructions and control one or more aspects of the plurality of pumps or the distribution system based on the control instructions.

Abstract: A hydraulic fracturing system is disclosed as including a singular mobile platform of at least one mobile power unit (MPU) and at least one first switch gear that is configured to handle electric power from the MPU. The MPU is configured to generate voltage that matches the requirements of an electrical bus from the at least one switch gear such that a combined electrical current generated as a result of the generated voltage is provided to the electrical bus to the components of the hydraulic fracturing system. Further, the hydraulic fracturing system may include electrical fracturing equipment with at least one second switch gear to support the at least one first switch gear in handling electric power from the MPU. A datavan may be included in the system to control load shedding, load sharing, and power distribution for the electrical fracturing equipment comprising the at least one second switch gear.

Abstract: Systems and methods include techniques for predicting hydrocarbon show indicators classifying a presence of hydrocarbons at a pre-determined distance ahead of a drilling bit. Input data is received that identifies, for different depths of a well that is being drilled, a drill bit location, a depth, a weight on bit, rotations per minute, a rate of penetration, lagged lithology percentages, and real-time mud gas logs. Data cleaning is performed on the input data using an isolation forest algorithm to remove outliers. A sequence of attributes for the well being drilled is identified from the input data, where the sequence of attributes includes the input data measured at a sequence of depths in the well. Hydrocarbon show indicators classifying a presence of hydrocarbons at a pre-determined distance ahead of a drilling bit are predicted in real time using machine learning on the sequence of attributes received while drilling the well.

Abstract: The present invention relates to a method for optimising at least one drilling parameter during an ongoing drilling process, the drilling being carried out by a percussive drilling machine, the drilling machine being set to drill at an operating point, the operating point of the drilling being determined by a setting of a plurality of control parameters. The method includes determining a first plurality of drilling machine operating points, the operating points being set by the plurality of control parameters. Furthermore, percussive drilling is performed at each of the first plurality of operating points and at least one resulting drilling parameter is evaluated for each of the plurality of operating points. The method also includes determining a new plurality of drilling machine operating points.

Abstract: A method for controlling computerized operations related to a wellbore comprises drilling the wellbore in a subsurface formation with a drill string including a drill bit. The method comprises acquiring a plurality of drilling parameters while drilling the wellbore. The method comprises determining, based on the plurality of drilling parameters, solids properties for solids forming a cutting plug up hole of the drill bit. The method comprises determining a length of the cutting plug based on the solids properties. The method comprises determining a cutting plug friction force based on the cutting plug length and a pressure differential across the cutting plug. The method comprises performing a drilling operation based on the cutting plug friction force.

Abstract: Systems and methods for simulating subterranean regions having multi-scale, complex fracture geometries in a realistic simulation environment, which includes in the modeling process three-dimensional multi-scale rock discontinuities, hydraulic fractures, and heterogenous reservoir properties. Non-intrusive embedded discrete fracture modeling formulations are applied in conjunction with commercial or in-house simulators to efficiently and accurately model subsurface characteristics including three-dimensional geometries having combinations of complex hydraulic fractures and multi-scale rock discontinuities.

Abstract: The present disclosure provides a method for monitoring pressure of fluid inside a wellhead, wherein the wellhead includes a casing spool defining a channel therein, at least one blind flange, and at least one landing base, the method including: deploying a tube along the channel and inside the casing spool, wherein a plurality of shear pins are distributed on the tube; connecting the tube to the at least one blind flange, wherein the at least one blind flange is connected to a pressure gauge; in response to confirming that the pressure of fluid inside the wellhead is to be determined, shearing the plurality of shear pins against the casing spool from inside the channel; and recording, at the pressure gauge, the pressure of fluid inside an annulus between the tube and the casing spool.

Abstract: A downhole tool for connecting and releasing portions of a tool string includes a housing; an electronics assembly; an activation mechanism; a valve assembly and a set of retainer dogs to connect and release a neck of another tool. The downhole tool may also include one or more measurement sensors for measuring a parameter and transferring one or more measured parameter values to the surface of the well.

Abstract: A Tunnel Extraction Machine (TEM) and its alternatives is a sustainable machine to excavate the tunnel or mine or dredge seabed in a rapid, efficient and cost-effective way as it allows large parts of the rock (or soil) to be extracted and pulled out of the tunnel or mine without necessity of digging or crushing them and with significantly reduced amount of the energy. Basically, it can excavate (cut) perimeter of the tunnel section in different shapes and sizes along with some other required longitudinal and transversal cuts and then extract and pull out the untouched and undug large portions of the rock or soil out of the tunnel.

Abstract: An inflatable folding tunnel reinforcement structure and a construction method thereof are provided. The inflatable folding tunnel reinforcement structure includes an inflation port, an airbag, a water blocking net, a steel plate, a scissor folding mechanism, a vertical support plate, an arc-shaped support plate, drainage channels, an upper support rod, a lower support rod, a locking pin, a threaded steel rod, a rolling connection pin, and an induction motor, where the upper support rod and the lower support rod are unfolded in opposite directions to a preset position through the steel rod; and the drainage channels are configured to perform water guidance and resistance for a leakage-proofing purpose. The construction method includes: preparation before construction, device fixation, on-site construction, structural inspection, and site cleaning. The present disclosure can treat various tunnel defects efficiently and conveniently and achieve a desired leakage-proofing effect.

Abstract: For the problem of difficult roof anchor withdrawal at the end of a working face, a static crushing directional anchor withdrawal method at the end of a large-mining-height working face is provided. The method includes the following steps: designing key parameters of boreholes for static crushing, including a borehole position, a spacing between boreholes, a borehole depth, and a borehole diameter at the end of a working face; then determining parameters of a static crushing agent grouting technology device for the construction of a static crushing process; and carrying out an anchor withdrawal operation at the end.

Abstract: Systems and methods for a partial state condenser are described. In one embodiment, the partial state condenser receives a working fluid, and includes a sense reservoir that holds the working fluid, a reservoir sensor that senses an electrical property of the working fluid, and a reservoir valve that is in fluid communication with the sense reservoir. The partial state condenser yet further includes a processor configured to execute instructions to determine a specific energy of the working fluid based on the electrical property of the working fluid. The processor is also configured to execute instructions to control the reservoir valve to regulate a flow of a portion of the working fluid from the sense reservoir based on the specific energy of the working fluid to maintain a two-phase saturation state associated with a saturation point within the partial state condenser based on the electrical property.

Abstract: A turbomachine including a turbine rotor, a compressor rotor, and a shaft, and at least one balance weight assembly connected to the shaft. The shaft drivingly connects the turbine rotor with the compressor rotor to rotate the compressor rotor about a rotational axis when the turbine rotor rotates about the rotational axis. The at least one balance weight assembly including a first chamber, at least one additional chamber, and a balance weight movable between the first chamber and the at least one additional chamber.

Abstract: A method for manufacturing a turbine blade comprising designing a turbine blade includes receiving initial geometrical and aerodynamic information of the turbine blade, obtaining the maximum amount of stress within a determined area of maximum stress, and obtaining a safety factor by dividing material yield stress of the turbine blade by the maximum amount of stress. The method further includes performing a first plurality of operations responsive to the safety factor being less than 1.5 and the determined area of maximum stress occurring at the junction of the blade airfoil and the blade root. The first plurality of operations includes creating a fillet at the junction of the blade airfoil and the blade root and increasing respective thickness of each airfoil slice of the plurality of airfoil slices with a distance from the junction of the blade airfoil and the blade root of no more than 15% of the blade airfoil length.