Abstract: The present invention relates to an integrated folding safety handrail and outdoor escape stairs for high-rise buildings and an emergency escape device which are applied to high-rise buildings such as safety handrails for preventing falling from a movable passage exposed to apartment houses such as apartments or office buildings, and the outside and is applied as a substitute for safety handrails in high-rise buildings or outdoor ground clearance 3 m or more which is usually used as a safety handrail for falling prevention and so that an escaping person in the high-rise building escapes outside or safely escapes to a lower floor in case of emergency such as fire, terror, and disaster.

Abstract: The present invention discloses an impact ice driller, which comprises a frame; a motor; a rotatable drill stem; a stationary element and a rotatable element disposed along a same axis and facing each other; wherein the stationary element is connected to the frame; the rotatable element is connected to the drill stem and synchronously moves with the drill stem as driven by the motor; the stationary element and the rotatable element each has an irregular surface capable of engaging with each other on each opposite surface, when the rotatable element rotates, the irregular surface of the stationary element and the irregular surface of the rotatable element can repeat engagement and separation, so that the rotatable element can repeat the movement along an axis relative to the stationary element. In this way, the drill stem can produce up-and-down impacts on ice cover ceaselessly in the ice drilling process with good ice drilling effect.

Abstract: A pipe assembly used in horizontal directional drilling operations. The pipe assembly has an outer member, an inner member, and first removable collar. The inner member has a polygonal outer profile of uniform shape along its length and is partially contained within the outer member. The first removable collar is supported on the inner member within the outer member and limits relative axial movement of the inner member and the outer member.

Abstract: Systems and methods contain fluids discharged from a subsea well or at the surface by capping the well blowout with a pre-positioned capping device. The capping device includes at least one blind shear ram and is separate from a blowout preventer. The blowout preventer may operate to control well events up to a certain pressure, above which the capping device is employed since the capping device has a higher pressure rating than the blowout preventer.

Abstract: A drilling system for a mining machine, the mining machine including a frame and a boom moveable coupled to the frame and a drill string positioned in a blast hole. The system includes an air compressor, a drill bit connected to the air compressor configured to receive low pressure air. The drill bit has a nozzle free drilling body, three sealed rotating cones, each cone with a plurality of cutting elements. Each cone having a sealed bit bearing assembly with diaphragm free lubricant spaces. A single central air conduit in the drilling body providing continuous high flow rate low pressure air from the drill string configured to strike the plurality of outer surfaces of the sealed rotating cones upon exit of the high flow rate low pressurize air from the single central air conduit cooling the sealed bit bearing assemblies. A relief conduit is used.

Abstract: Methods that may be employed to help to equalize the length of the teeth on a pin-and-box SCR connector during make-up include locating the make-up groove on the box at the far box end away from the pipe end. This causes the make-up force to tension and stretch the box to make it longer. Additionally or alternatively placing grease or other fluid in the nib groove creates a resistance force to nib entry. The grease or fluid exits through a nib vent port in the box while creating a resistance that compresses the pin and stretches the box causing the tooth spacing of the pin and the box to be similar. Providing a ring groove at both ends of the box allows a tensioning device to be used to tension the box causing box elongation, which equalizes the tooth length of pin and box members during connector make up.

Abstract: A hard banding apparatus for pipes and other drilling tools. The hard banding apparatus has a floating weld box that moves in response to the shape of the item to be welded. The apparatus can include a drive roller assembly and lift mechanisms that lift and move the weld box or housing to a desired height.

Abstract: A system to protect a downhole antenna from fluid penetration, in some embodiments, comprises a collar; a bobbin antenna, mounted on the collar, including multiple coil slots on an outer surface of the bobbin antenna and including one or more intra-bobbin wireways between at least one of the coil slots and an outlet of the bobbin antenna; and a collar wireway that is dedicated to the bobbin antenna.

Abstract: A downhole manifold assembly includes a manifold body defining a longitudinal axis and having a first end face, a second end face, and an outer surface extending therebetween. A fluid circuit is defined in the manifold body and includes a plurality of axially extending fluid passages and a plurality of radially extending fluid passages. The radially extending fluid passages extend to the outer surface of the manifold body. Each radially extending fluid passage defines a respective aperture in the outer surface. The manifold assembly also includes a control valve coupled to the manifold body. The control valve is positionable between a first position in which a flow of pressurized fluid is channeled through the fluid circuit in a first direction, and a second position in which the flow is reversed and the pressurized fluid is channeled through the fluid circuit in a second direction.

Abstract: Wellbore drilling system comprising: a drilling tower, a drill floor having a well center through which a drill string passes along a firing line, a drilling tubulars storage rack adapted to store multiple drilling tubulars in vertical orientation, a tubular racking device having at least a lower first tubular racker assembly and at least a second tubular racker assembly operable at a greater height than the first tubular racker assembly, each tubular racker assembly comprises a base, a motion arm connected to said base, and a tubular gripper member connected or connectable to the motion arm and adapted to grip a tubular, wherein—with the tubular gripping member connected to the motion arm of the racker assemblies—the tubular racking device is adapted to grip and retain a drilling tubular by the tubular racker assemblies, and wherein the tubular racking device is adapted to place a tubular in and remove a tubular from the drilling tubulars storage rack, and wherein the tubular racking device has a reach

Abstract: Mitigating drilling circulation loss can be implemented as a wellbore drilling system that includes a drilling liner and a drill head assembly. The drilling liner is configured to be positioned in a lost circulation zone of a subterranean formation in which a wellbore is being drilled. The drilling liner is configured to flow wellbore drilling fluids from a surface of the wellbore to the subterranean formation while avoiding the lost circulation zone. The drill head assembly is attached to a downhole end of the drilling liner, and is configured to drill the subterranean formation to form cuttings, receive the wellbore drilling fluids, and flow the cuttings and the wellbore drilling fluids into the drilling liner while avoiding the lost circulation zone and towards the surface of the wellbore.

Abstract: A transportation apparatus is described herein that comprises a lifting apparatus having a support structure, a base portion and a scissor-lift device disposed between the support structure and the base portion. The scissor-lift device having a first arm having a first end and a second end pivotally connected to a second arm having a first end and a second end. The first end of the first arm is hingedly connected to the base portion and the second end of the first arm is slidably engaged with the support structure. Similarly, the first end of the second arm is slidably engaged with the base portion and the second end of the second arm is hingedly connected to the support structure. A method of raising centrifuge equipment to a desired height via the lifting apparatus is also described herein.

Abstract: A subsea wellbore system is disclosed in which a return fluid flows from a wellbore to the surface via an annulus between a drill string and a casing and then between the drill string and a riser, wherein the system includes a device configured to prevent flow of the return fluid flowing through the annulus between the drill string and the riser, and a bypass line configured to divert the flow of the return fluid from the annulus between the drill string and the riser to the surface.

Abstract: A packer assembly includes an elongate body, an upper shoulder and a lower shoulder each disposed about the elongate body, and an upper sealing element and a lower sealing element each disposed about the elongate body and positioned axially between the upper and lower shoulders. A spacer interposes the upper and lower sealing elements and has an annular body that provides an upper end, a lower end, and a recessed portion extending between the upper and lower ends. A diameter of the annular body at the upper and lower ends is greater than the diameter at the recessed portion.

Abstract: An internal tractor system useful for advancing and withdrawing a tubular body within a wellbore is provided. Preferably, the wellbore includes a horizontal section, and the internal tractor system is used to advance a string of coiled tubing or a flexible jetting hose along the horizontal section. The internal tractor system includes an elongated carrier body. The carrier body defines a wall forming a plurality of radially-disposed prongs, and a passageway within the wall. The passageway is dimensioned to closely receive the tubular body along the length of the carrier body to prevent buckling. The internal tractor system also includes a wiring chamber housing electrical wires or data cables within one of the plurality of prongs, and at least one pair of grippers residing within opposing prongs. Each gripper is configured to engage the tubular body when rotatably actuated. A method of advancing a tubular body along a wellbore, using the internal tractor system is also provided.

Abstract: Values for porosity and permeability of core samples in a borehole are estimated by generating radial waves with an acoustic source in fluid around the core sample, and measuring pressure in the fluid. Moreover, the acoustic source operates at frequency close to a resonant frequency of the core sample. After the acoustic source no longer operates at the resonant frequency, pressure in the fluid attenuates over time. The pressure attenuation is recorded by the pressure measurements, along with the pressure in the fluid at the first harmonic (spectral component). The pressure attenuation and spectral component each are dependent on porosity and permeability of the core sample. Thus values for the porosity and permeability are determined based on the arithmetic relationships between pressure attenuation and the spectral component and porosity and permeability.

Abstract: A string from the surface is connected to a packer extension with a thread to provide a metal to metal seal for production or injection through the packer. The thread provides a metal to metal seal. The initial string is released from the packer extension by a tubular cut made with a cutting tool above the thread that provides the metal to metal seal to the packer extension. An outer sleeve surrounds an expanded length of wall which is the target cut zone above the threaded connection. A cut through the tubular does not cut the outer sleeve. The outer sleeve features a left handed square thread to engage a known released tool run in on a string to connect to the packer release mechanism and release the packer for removal with the release tool suspended from a string.

Abstract: A milling tool includes a cutting insert coupled to a movable blade. The movable blade may change from a retracted to an expanded state to engage and cut downhole casing. A cutout initiation region of the movable blade makes contact with the downhole casing, and cutting inserts with turning portions designed to cut in a turning manner may be located in the cutout initiation region. Cutting inserts with milling portions designed to cut in a face-milling manner may be located outside the cutout initiation region. Some cutting inserts may include both turning portions and milling portions.

Abstract: A gripping assembly for a fishing tool which includes first and second end members and a plurality of gripping members which are retained by the first and second end members and which are moveable between a radially expanded configuration and a radially restricted configuration by rotation of the second end member with respect to the first end member.

Abstract: Embodiments of the present disclosure are directed to a system including a flange configured to couple to a component of a mineral extraction system, where the flange includes a base, an exterior annular tapered portion extending from the base, and an annular wall extending from the exterior annular tapered portion, wherein the annular wall at least partially defines a central exterior cavity and at least partially defines an interior annular cavity. The system also includes an inductive power and data transmission system mounted within the flange, wherein the inductive power and data transmission system comprises a first component and a second component, wherein the first and second components are separated by the annular wall.

Abstract: A gate valve assembly for use with a tubing hanger with a vertical bore, the gate valve including a housing located externally to the tubing hanger and a gate at least partially locatable in the housing and configured to extend through the tubing hanger and into the tubing hanger vertical bore. The gate valve assembly also includes a seat assembly having a seat and located within the tubing hanger, the seat assembly configured to seal against the gate when the gate is extended into the tubing hanger vertical bore.

Abstract: The present casing wiper plug system and method includes a novel top wiper plug and a dissolvable blocking element. The top wiper plug includes a rupture disk and an open tail section configured and dimensioned to receive the dissolvable blocking element. The blocking element can be dissolved by a solvent and can dissolve quickly given the size or materials of the blocking element. When used in conjunction with a bottom wiper plug and a displacement fluid, the central bores of the top and bottom wiper plugs and shoe track provide an open passage to the formation allowing future injection or fracking fluid to access the formation. The blocking element is released into a seat of the open tail section to temporarily block the passage so a casing test can be performed on the casing. After the test is complete, the blocking element is dissolved to reopen the passage.

Abstract: A tool insert is removable from a fluid passage in a drill tool body by pressurizing fluid in a removal volume defined between the tool insert and the drill tool body, to by exerting a net fluid pressure bias on the tool insert in a removal direction along the fluid passage. The tool insert can be an annulus sealing assembly mounted in a rotating control device (RCD), with the removal volume being defined radially between a body of the RCD and a bearing assembly of the annulus sealing assembly. A common hydraulic liquid may be used for lubricating the bearing assembly and for hydraulically actuated removal of the annulus sealing assembly.

Abstract: A settable down hole tool is of increased drillability and/or of increased expansibility. The improvement in drillability can be caused by fracturing cast iron slips into a large number of small pieces that can be circulated out of a well without further reduction in size. The improvement in expansibility can be partially caused by providing an expander cone of increased hardness thereby allowing an increased angle on the expander cone and slips. The improvement in expansibility can be partially caused by increasing the thickness of the slips.

Abstract: Downhole tools and methods and systems associated therewith, wherein the downhole tools comprise a body and at least one sealing element comprising an aqueous-degradable thermoplastic rubber copolymer composed of a thermoplastic component and a rubber component. The thermoplastic component is present in an amount of about 5% to about 95% by weight of the aqueous-degradable thermoplastic rubber copolymer, and at least a portion of the sealing element hydrolytically degrades when exposed to an aqueous fluid.

Abstract: A high pressure high temperature packer features an actuation assembly of a plurality of rings rotationally locked to a mandrel and initially spaced apart. A pressure actuated piston responsive to tubing pressure pushes the actuation rings together. Spring discs also rotationally locked to the mandrel are between pairs of actuation rings that feature a circumferential protrusion. On application of axial force the protrusion engages a sloping portion of the spring disc and moves the sloping portion toward a more vertical orientation. A corrugated tube surrounds the spring discs with a curled end of each spring disc engaged to an internal tube corrugation. A seal element is on the external corrugations of the tube. The spring discs expand the tube to bring the sealing element and external tube peaks to the borehole wall. Slots in the spring disc allow irregular growth of the tube to conform to surface irregularities.

Abstract: A method is for the combined perforation, cleaning, and the subsequent plugging of a longitudinal section of a well. The well is provided with two pipe bodies placed substantially concentrically. The method includes lowering a perforation tool into the innermost pipe body to the longitudinal section, forming perforations in both pipe bodies along the longitudinal section with the perforation tool, cleaning the longitudinal section with a flushing tool which is attached to a lower portion of a string allowing through-flow, pumping a fluidized plugging material down the string and into the innermost pipe body at the longitudinal section, and placing the fluidized plugging material in the innermost pipe body, and thereby also into the entire cross section of the well via the perforations within the longitudinal section. A flushing tool is for cleaning the longitudinal section of the well.

Abstract: A fluid flow control device serving as an inflow port from a fluid reservoir (R) to the interior of a production pipe (S) is in the form of a housing (3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3l). The housing has a primary flow path (18) and a secondary flow path (19). The secondary flow path is in fluid communication with a chamber (B) in which is arranged an actuator (5) for a valve device (4), the valve device arranged to open and close the primary flow path. At least one flow restrictor (1,2) is arranged in the secondary flow path, the flow restrictor arranged to provide a pressure to chamber (B) sufficient to actuate the valve to an open position when the fluid flowing through the secondary flow path is oil, and a pressure sufficient to actuate the valve to a closed position when the fluid has a viscosity and/or density less than oil.

Abstract: A method and apparatus for filling an annulus between a wellbore and a casing string with cement are provided. A baffle is arranged between a port on a side of the casing string and an interior volume of the casing string. The baffle includes orifices arranged there around that distribute the flow of cement about the circumference. After the cement has been pumped, a sealing sleeve is moved over the baffle and the port and forms a metal-to-metal seal that isolates the baffle and the port from the interior volume of the casing string.

Abstract: Systems and methods describe a frac sleeve with set of inner sleeves that allow selective opening and closing of such sleeves.

Abstract: A downhole bypass tool that includes an inlet for receiving fluid into a housing of the bypass tool is described herein. The bypass tool also includes a flow directing apparatus disposed in the housing for directing fluid to flow into an operational flow path of a vibratory tool. The vibratory tool is at least partially disposed within the hosing of the bypass tool. The flow directing apparatus operates to selectively bypass the operational flow path of the vibratory tool such that the fluid bypasses the operational flow path of the vibratory tool and flows out of an outlet of the bypass tool.

Abstract: A facility for monitoring a geological storage site for storing a gas, such as CO2 or methane, comprises, in combination, at least one geochemical measurement device (DMG), comprising a plurality of gas sampling probes (SPG) connected to a gas analyzer (AG), an electrical measurement device (DME) comprising a plurality of electrodes (ELEC) and a resistivity meter (RES), and a meteorological station (SM). The geochemical and electrical measurement devices are controlled by a logic controller (AUT). The geochemical and electrical measurement devices and the meteorological station are connected to a data collector (COLL) that is itself connected to means for transmitting said data (MTD).

Abstract: A computer system and method of automatically generating a Local Grid Refinement (LGR) gridded model of a gas reservoir. A geologic file includes information identifying the locations of one or more wells according to root grid cells within a volume of the earth to be modeled. User inputs specify the number of hydraulic fractures from each well, and such parameters as the fracture length, etc. User inputs also specify the number of “splits” of the root grid cells containing hydraulic fractures; those root grid cells are then split into finer resolution grid cells of increasing width within the root grid cells containing the fractures. For horizontal wells, user inputs indicate the number of splits of root grid cells containing the lateral portions of the wellbore. Non-orthogonal and complex fractures are processed by a “nested” LGR approach.

Abstract: Provided in some embodiments are systems and methods for simulating a well. Embodiments include, for each lateral of a well, obtaining wellbore directional survey data identifying a path of the lateral, generating (using the wellbore directional survey data) a geographic information system (GIS) virtual wellbore path, obtaining wellbore tubing, perforation and casing data for the lateral. Generating (using the wellbore tubing and perforation data) a tubing extensible three dimensional (X3D) file including data corresponding to X3D virtual tubing path. Generating (using the wellbore casing data) a casing X3D file including data corresponding to an X3D virtual casing path for the lateral. Generating a well X3D file for the well (including links to the tubing and casing X3D files) that can be provided to an X3D application of a remote computing device for generating a 3D simulation of the well.

Abstract: Embodiments can provide a method for allocating production for an oil or gas well, comprising: receiving input data comprising well test data, completion/recompletion data, and lease production data; detecting, through an outlier detection analysis, one or more outlying data points in the well test data; detecting, through a change point detection analysis of the well test data, one or more data points indicative of an intervention; generating a decline curve for each period in between the one or more data points indicative of an intervention and disregarding the one or more outlying data points; determining the production of a well for a predetermined period of time by integrating the decline curve over the predetermined period of time; and calculating the allocated production for the well by multiplying the ratio of the production of the well to the sum of the production for all wells in the lease by a production per lease value.

Abstract: A horizontal well completion tubing string capable of achieving sublevel mining comprises a production casing. A horizontal section of the production casing is connected to two primary screen pipes. A pumping pipe is fixed in a vertical section of the production casing via a packer. A horizontal section of the pumping pipe extends freely in a horizontal well section constituted of the two primary screen pipes and the casing. A secondary screen pipe is disposed on the horizontal section of the pumping pipe. Meshes of the secondary screen pipe each comprises a reduced section, a straight section and an impact section, wherein an inner diameter of the reduced section is reduced outwardly along the radial direction of the secondary screen pipe, and an inner diameter of the impact section is reduced outwardly along the radial direction of the secondary screen pipe.

Abstract: A flow balancing device facilitates polymer injection in a horizontal formation in a manner that minimizes shear effects on the injected polymer. Features of the device reduce velocity using a broad circumferentially oriented inlet plenum that leads to a circumferentially oriented path having zig-zag fluid movement characterized by broad passages that define the zig-zag pattern so as to reduce velocity at such transition locations. Because the path is circumferentially oriented there is room for broad transition passages independent of the housing diameter. The broad crescent shaped inlet plenum also reduces inlet velocity, and therefore shear, to preserve the viscosity of the injected polymer. Other materials can be injected or the device can be employed in production service as well as injection. A related method employs the described device for injection.

Abstract: A plunger catch assembly for a lubricator includes a catch housing and catch end cap. The catch housing and catch end cap form a dart cylinder and a diaphragm cylinder. The dart cylinder allows a dart positioned at least partially therein to slidingly and selectively extend into the lubricator to catch a plunger. The dart may be coupled to a diaphragm by a spring and spring plate. The plunger catch assembly may be reconfigurable between a pneumatic configuration and a manual configuration. The end cap may include a machine thread for coupling a handle assembly and a pneumatic coupler for coupling a pneumatic line.

Abstract: Systems and methods for producing hydrocarbons from a subterranean well include a fluid production tubular and a gas production tubular extending separately into the well. An electrical submersible pump is in fluid communication with the fluid production tubular. A cyclone separator is within the well. The cyclone separator has a rotating screw with thread surfaces open to an inner diameter surface of the well. The rotating screw is positioned between a lower end of the gas production tubular and the electrical submersible pump. The thread surfaces are angled to direct a liquid stream axially downward and radially outward towards the inner diameter surface of the well. A central passage extends through the rotating screw and is oriented to direct a gas stream towards the lower end of the gas production tubular.

Abstract: Systems and method for producing hydrocarbons from a subterranean well include a combined product tubular extending into the well, a gas production tubular in fluid communication with the combined product tubular and a fluid production tubular in fluid communication with the combined product tubular. A jet pump is located a junction of the tubulars. An electrical submersible pump is in fluid communication with the fluid production tubular. A cyclone separator is located within the well and has a rotating screw with thread surfaces open to an inner diameter surface of the well. The thread surfaces are angled to direct a liquid stream axially downward and radially outward towards the inner diameter surface of the well, and to direct a gas stream to a lower end of the gas production tubular.

Abstract: A method of recovering hydrocarbon resources in a subterranean formation may include injecting a solvent via a wellbore into the subterranean formation while supplying radio frequency (RF) power from the wellbore and into the subterranean formation. The method may also include recovering hydrocarbon resources via the wellbore and from the subterranean formation while supplying RF power from the wellbore and into the subterranean formation.

Abstract: The invention relates to injecting steam into crude oil for several benefits, primarily of which is to remove salt by transferring the salt into the condensed water from the steam. Steam transfers salt via a different transfer mechanism and therefore doesn't require the high shear mixing of conventional water injection systems. As such, steam injection through a variety of procedures, is more efficient at gathering salt into water that itself is easier to remove from the crude oil.

Abstract: A method for remotely controlling services to a well during hydraulic fracturing operations includes generating a high pressure fluid. The high pressure fluid is pumped into a subterranean geologic formation through a wellbore of a first well at a pressure to fracture the subterranean geologic formation. The method also includes performing a service on a second well that is located within a pressure zone defined around the first well and the second well. The method further includes controlling the performance of the service from a remote operations hub located outside of the pressure zone. The pumping into the first well may be performed simultaneously with the service on the second well.

Abstract: A method and system for using a distributed electromagnetic sensing system in horizontal hydraulic fracturing wells to monitor fracture growth in real time.

Abstract: A method includes controlling an oil and gas extraction process, controlling a production separation process, and controlling a de-gassing process. The method also includes optimizing the oil and gas extraction process, the production separation process, and the degassing process to optimize at least one process objective. The method could further include controlling a lift-gas compression process. The optimizing could include optimizing the lift-gas compression process, the oil and gas extraction process, the production separation process, and the degassing process to optimize the at least one process objective.

Abstract: A fluid intake for a system includes a support structure defining an interior space and configured for fluid to pass into the interior space. The system includes a pump for pumping fluid from a well including a well casing defining a passageway for the fluid to flow therethrough in a flow direction. The fluid includes liquid and gas. A porous member extends over a portion of the support structure. The fluid intake extends inside the passageway in the flow direction such that the porous member and the well casing define an annular space therebetween. The porous member defines pores for liquid to wick through. The interior space is in flow communication with the pores such that liquid wicking through the porous member passes into the interior space.

Abstract: A control system that corrects differential pressure measurements with downhole annulus pressure information is disclosed. When differential pressure is zeroed with the BHA off-bottom, the annulus pressure value is baselined. During drilling, a controller receives surface differential pressure measurements and annulus pressure measurements. As the controller receives each new annulus pressure measurement, it compares it to the baseline annulus pressure value to obtain a different annulus pressure value. The controller corrects the surface differential pressure measurements with the annulus pressure measurements. As the controller receives each new surface differential pressure measurement, it subtracts out the current difference annulus pressure value. As a result, the modified surface differential pressure measurement remains a reflection of mud motor performance that removes the influence of the increased density of the fluid, thereby improving autodrilling control.

Abstract: A well advisor system and console for monitoring and managing well drilling and production operations. The system may be accessed through one or more workstations, or other computing devices, which may be located at a well site or remotely. The system is in communication with and receives input from various sensors. It collects real-time sensor data sampled during operations at the well site. The system processes the data, and provides nearly instantaneous numerical and visual feedback through a variety of graphical user interfaces (“GUIs”), which are presented in the form of an operation-specific console. The input and data provides information related to rate of penetration concerning a well being drilled, and present the information for related parameters in real time against a plotted “fairway” of determined maximum and minimum values, with a focus on the safety of the drilling operation.

Abstract: The invention relates to a system and a method for determining flow patterns of fluid in a production well. Especially, the invention relates to a method of determining flow patterns between and into oil production wells drilled in the Earth when flow is improved by water flooding. The system comprises a canister (1) said canister being located in said formation at a subterranean location within or proximate the wellbore, the canister being provided with an exit opening (5), a traceable component (4) being placed in the canister and able to pass through the exit opening and a release mechanism capable of releasing the traceable component when triggered by a triggering mechanism such that the traceable component enters the fluid flowing through the well through the exit opening and is present in the fluid flow in the wellbore.

Abstract: Methods and computer program products for evaluating the performance of a gas lift well. The method includes measuring key gas lift well parameter data and concentration of a tracer present in a substance retrieved from the gas lift well which was injected into the annulus formed between a well casing and a production tubing of the gas lift well. The actual travel time of the tracer which corresponds to a time duration required for injected tracer and lift gas to travel from the injection point, down the annulus, through one or more points of entry of the lift gas into the production tubing is then determined based on a deviation in the concentration of the tracer measured by accounting for variations in a fractal obtained by plotting multiple key well parameter data and a concentration of the tracer in a multi-dimensional time dependent plot.