Abstract: A testing system includes a main wellbore, at least one injection tunnel and production tunnel, a monitoring system including at least one sensor, and a recovering tube. The injection and production tunnels are parallel with each other and extend perpendicularly from the main wellbore. The method for conducting in-situ oil recovery sweep testing includes introducing an injection fluid into a main wellbore and at least one injection tunnel, monitoring conditions of the at least one production tunnel, and collecting produced fluid from the production tunnel with a recovering tube. A method for conducting sequential in-situ oil recovery sweep testing includes locating a recovering tube in a target production tunnel and conducting a sweeping process. The sweeping process includes introducing an injection fluid into an injection tunnel, monitoring conditions of the target production tunnel, collecting a produced fluid from the target production tunnel, isolating the target production tunnel, and repeating.

Abstract: A method of producing a multiphase formation fluid, the method comprising producing the multiphase formation fluid to a surface collection point via a first electric submersible pump (ESP) of a transformable ESP redundancy system comprising: the first ESP, a first subsurface safety valve seated on a upper landing nipple, and a tubing string defining an upper landing nipple positioned distal to the first ESP as well as the lower landing nipple positioned proximal to the first ESP; removing the first subsurface safety valve; installing a wireline-retrievable ESP system on the lower landing nipple, the wireline-retrievable ESP system comprising: a second ESP and a second subsurface safety valve coupled to the second ESP inlet end, the subsurface second safety valve seated on the lower landing nipple as well as defining a fluid inlet to the second ESP inlet end; and producing the multiphase formation fluid via the second ESP.

Abstract: Systems and methods of the present disclosure provide controlled flowback of fluids for stress testing in wireline toolstrings. For example, a downhole toolstring may include a flow control device configured to receive a fluid from a subterranean formation. The flow control device includes a reciprocating pump having an upper drive unit flowline chamber and a drive unit piston. The flow control device also includes a hydraulic valve system configured to control a flow of a fluid into the upper drive unit flowline chamber. The flow control device further includes a control valve/relief valve (CV/RV) combination disposed between the hydraulic valve system and the upper drive unit flowline chamber. The flow control device also includes a mud valve system configured to control a flow of an injection fluid. The downhole toolstring also includes a control system configured to control flowback of the fluid.

Abstract: Disclosed is a rupture disc assembly for use in making a temporary seal in a vessel such as a casing string. The rupture disc assembly may generally include (A) a rupture disc having a side surface having a shallow taper inward towards a bottom surface of the rupture disc (B) an actuating mechanism including (i) an outer sled having an inner supporting surface forming a taper complimentary to the shallow taper of the side surface, (ii) an inner sled disposed within the outer sled and having a support shoulder to support the bottom surface of the rupture disc and (iii) a securing mechanism and (C) a housing to house the rupture disc and actuating mechanism.

Abstract: A connector assembly for decoupling of an end fitting of a movable subsea structure from a fixed subsea structure. The connector includes a first body having a first end configured for receipt into the tubular subsea structure, a second end formed into a receiving socket portion and one or more recesses in an inner wall of the socket portion; a second body having a first end configured for receipt into the socket portion of the first body and a second end configured for connection to one end of the movable subsea structure; the connector assembly includes a plurality of first coupling members mounted in the second body and movable between an extended position and a retracted position; a locking member mounted in the second body and movable between an engaged position and a disengaged position; and a frangible retaining member configured to retain the locking member in the engaged position.

Abstract: Described herein are systems and methods for sealing a well with multiple annuli. In an example, a downhole assembly can be lowered into a cavity of a production tube. Openings can be created in the production tube and an inner casing. The downhole assembly can create a seal between the production tube and the inner casing that allows barrier fluid to freely flow into an outer annular gap between the inner casing and an outer casing. A barrier fluid can be injected such that the barrier fluid flows through the radial openings into the outer annular gap.

Abstract: A method of controlling drilling of a wellbore includes obtaining, during oscillation of a drill string, one or more measured torque values at one or more rotational positions of the drill string, wherein the oscillation alternates the drill string's rotation in clockwise and counter-clockwise directions. A torsional compliance of the drill string is determined based on physical or operational parameters. Using the measured torque values and the torsional compliance, a stored torque in the drill string is calculated. The drilling operation is then controlled by adjusting one or more drilling parameters based on the determined stored torque to maintain operational stability and toolface orientation.

Abstract: A portable, attachable drill for multidirectional underground drilling is disclosed. The drill includes jack assembly for adjusting the drill angle and an attachment for portability and placement of the drill. The drill further comprises a body, a track assembly mounted on the body and a carriage assembly slidably mounted on the track assembly to rotate and move the drill pipe along the track assembly. The drill pipe is rotated by a gearbox assembly attachably detached to the carriage assembly with the gearbox assembly spring loaded to the carriage assembly for ease of removal.

Abstract: A down-the-hole drill hammer including a drill bit about a distal end of the hammer and a piston for percussively contacting the drill bit. The drill hammer further includes a valve assembly for supplying and exhausting drive fluid to and from the piston, the valve assembly having a valve housing in fluid communication with drive fluid supply ports, drive ports and exhaust ports, and a control valve movable within the valve housing and in fluid communication with the valve housing. The drill hammer further includes a piston follower valve unconnected to the piston movable within the control valve for controlling positioning of the control valve and pressures applied to the piston via the drive ports and exhaust ports.

Abstract: A cost-effective, lightweight, and easily attachable/detachable cable tether apparatus to increase the run distance of a tether cable thereby overcoming factors such as pipe geometry and cumulative pipe bend angle. The apparatus includes two clamshell-like wheels pivotably joined about a hinge with a quick-release mechanism configured for selectively locking and unlocking the apparatus at varied intervals along the tether cable. The tether cable being releasably affixed to the apparatus at a location offset below the axis of rotation of the wheels.

Abstract: An anchor can include an inner mandrel, a slip configured to grip a well surface, and a link arm with pivots at respective opposite ends and the link arm being configured to rotate relative to the slip about a pivot, and the other pivot being configured to displace radially outward relative to the inner mandrel when the anchor is set in the well. A method can include deploying an anchor into a wellbore, and setting the anchor in the wellbore, the setting including displacing a slip radially outward into gripping engagement with a well surface, the displacing including rotating a link arm until a surface of a wedge engages a surface of the link arm and another surface of the link arm engages a surface of the slip.

Abstract: A drill bit comprises a bit body having a body face and a plurality of blades each extending from the bit body from a root portion adjacent the body face to a tip portion defining a cutting region, each blade having a leading face and a trailing face. The drill bit further comprises at least one outlet port disposed adjacent the leading face of at least one blade at a location between the root and tip portions of said at least one blade, the at least one outlet port for directing drilling fluid towards the cutting region of the at least one blade.

Abstract: Provided is a multilateral junction, a well system, and a method. The multilateral junction, in one aspect, includes a lateral branch template having a lateral window for positioning proximate a junction between a lateral wellbore and a main wellbore, and a lateral branch connector adapted to be sealably engaged to the lateral branch template, a portion of the lateral branch connector extending through the lateral window. The multilateral junction, according to this aspect, further includes one or more sealing elements configured to expand in volume located proximate a joint between the lateral branch template and the lateral branch connector.

Abstract: A method including drilling a wellbore using a drill bit connected to a drill string. The drill string includes a vibrational energy harvester and a tool disposed inside a casing of the drill string. The vibrational energy harvester includes a stator including a conductive coil, and a rotor including magnets disposed outside the conductive coil. The rotor is unpowered. The rotor is free to rotate outside the conductive coil, and the rotor is unattached to other components of the drill string. The method also includes generating vibrations in the drill string by engaging the drill bit to a bottom of the wellbore. The method also includes harvesting electricity generated in the stator as the rotor rotates in response to the vibrations. The method also includes supplying, via an electrical connection between the stator and the tool, the electricity to the tool.

Abstract: An electric submersible pump (ESP) assembly. The ESP assembly comprises an electric motor having a first drive shaft; a seal unit having a second drive shaft coupled to the first drive shaft of the electric motor and disposed uphole of the electric motor; a first gas separator having a third drive shaft coupled to the second drive shaft and disposed uphole of the seal unit; a second gas separator having a fourth drive shaft coupled to the third drive shaft and disposed uphole of the first gas separator; a third gas separator having a fifth drive shaft coupled to the fourth drive shaft and disposed uphole of the second gas separator; and a centrifugal pump assembly having a sixth drive shaft coupled to the fifth drive shaft and disposed uphole of the third gas separator.

Abstract: A downhole inflow control valve with multi-stage regulation is provided. The downhole inflow control valve with multi-stage regulation includes a sand control screen, a sliding sleeve, an oil nozzle sleeve and a driver. The driver is configured for driving the sliding sleeve to reciprocate. The sliding sleeve is located between the sand control screen and the oil nozzle sleeve. Screen holes are formed in the sand control screen. One of the oil nozzle sleeve and the sliding sleeve is provided with oil inlet nozzle groups, and the other of the oil nozzle sleeve and the sliding sleeve is provided with oil inlet holes. The sliding sleeve and the oil nozzle sleeve are connected through a cam mechanism. One of the sliding sleeve and the oil nozzle sleeve is fixed, an other of the sliding sleeve and the oil nozzle sleeve may rotate around own axis.

Abstract: A perforation tool is described herein which has a loading tube for supporting a plurality of perforation charges, the loading tube having a first end and a second end; a detonation module disposed within the loading tube and having a plastic detonator housing for enclosing a detonation component, the detonator housing having a plurality of first flexible projections that extend in an axial direction of the detonator housing and engage with the loading tube to removably attach the detonation module to the first end of the loading tube, the detonator housing having a first centering structure for centering the loading tube within the perforation tool; and a bulkhead module coupled to the second end of the loading tube, the bulkhead module comprising a bulkhead member and a bulkhead coupler, the bulkhead coupler comprising an electrical connector for making electrical connection with the bulkhead member and a plurality of second flexible projections that extend in an axial direction of the perforation tool and

Abstract: An improved top pot assembly utilizes an attachment body for attaching the rubber to a bearing assembly for rotation with the inner barrel. The attachment body simplifies the replacement of the rubber on the drilling assembly. The attachment body provides a guide that slopes downward into the central aperture and the bore to guide the mandrel and drilling string towards the bore. The attachment body also provides a stripper receiver for attachment of the rubber to the attachment body. The attachment body attaches to the housing which attaches to the bearing assembly for rotation of the rubber and the inner barrel.

Abstract: A system for use in a wellbore that includes a casing with a casing interior extending from a surface to a predetermined depth in the wellbore, a tubing with a tubing interior disposed inside the casing, and an entry guide with an entry guide upper end coupled to a tubing lower end of the tubing. The entry guide has an expandable portion that is configured to expand, in response to a pressure change, from a compressed state to an expanded state. The entry guide has an opening at an entry guide lower end that is exposed to the casing interior, and a second diameter of the opening in the expanded state is larger than a first diameter of the opening in the compressed state.

Abstract: A downhole valve assembly includes a safety valve and an actuator that opens and/or closes the valve. The actuator can be an electro-hydraulic actuator (EHA), an electro mechanical actuator (EMA), or an electro hydraulic pump (EHP). The downhole safety valve can also include an electric magnet. The electric magnet can act as or control a magnetic decoupling mechanism to control closure of the safety valve.