Abstract: A system for monitoring fluid flow conditions on a return flow line including a return flow line in fluid communication with a wellbore, a shaker, and a header box. The system includes a contactless flow sensor facing an interior of the header box or an outlet of the return flow line, a data gathering and analyzing unit coupled to the contactless flow sensor, and a control panel to display data and notify when hazardous conditions occur. A method for monitoring fluid flow conditions on a return flow line including flowing a drilling mud into the header box through the return flow line and monitoring the height of the drilling mud in the header box and/or return flow line to determine the fluid level using the contactless flow sensor. The fluid level is used to determine a fluid flow rate and indicate a current operational or a hazardous operational status.

Abstract: An assembly comprises a downhole tool and a gripper. The downhole tool is configured to be set in a wellbore and milled after a scheduled period, wherein the downhole tool has a first tool end and a second tool end along a longitudinal direction. The gripper is positioned opposite the first tool end along the longitudinal direction, wherein the gripper comprises a slider and an activator. The activator is configured to be moved by the downhole tool relative to the slider between an inactivated position and an activated position when the downhole tool is milled from the second tool end. The slider remains unmoved when the activator is in the inactivated position, and the slider moves radially to engage with an internal wall of the wellbore and stop the downhole tool from rotation when the activator is in the activated position.

Abstract: In general, in one aspect, embodiments relate to a perforating gun that includes a gun body, a bulkhead assembly for coupling the perforating gun to an uphole perforating gun, where the bulkhead assembly is at least partially disposed in the gun body, and where the bulkhead assembly includes a bulkhead and electrical feedthrough formed in the bulkhead, and a charge tube assembly attached to the bulkhead assembly, where the charge tube is disposed in the gun body, and where the charge tube assembly includes a charge tube, a detonator housing interlocked with the charge tube, an end alignment interlocked with the charge tube, and a detonation cord extending from the detonator housing to the charge tube.

Abstract: A ranging system having magnets positioned at various locations along the drive system. Location of the magnetics is shifted to different points on the drilling string to remove the need for a nearby bit sub that would detrimentally affect the steerability of the drilling system.

Abstract: A compact drill assembly, a drilling system and a method for automatically drilling small diameter holes of arbitrary depth. The compact drill assembly includes a housing having a geometry that allows insertion into the confined space and a rotatable drilling spindle that includes an actuated locking collet assembly arranged and disposed to selectively secure and release a composite bit. A bit conveying arrangement is configured to convey the composite bit along the non-confined dimension and along the confined dimension through the actuated locking collet assembly. A drill drive is arranged and disposed to advance the rotatable drilling spindle along the confined dimension. The method includes conveying a composite bit along the non-confined dimension and along the confined dimension through the compact drill assembly and advancing the composite bit along the confined dimension to drill into a surface along an edge of the confined space.

Abstract: Described is a drilling fluid composition with enhanced hole cleaning properties and a method of its use. Following an indication of sticking of a drill pipe during a drilling operation, a drilling fluid composition, including a first exothermic reactant, is injected into a subterranean formation. Then, a drilling fluid composition, including a second exothermic reactant, is injected into the subterranean formation. An exothermic reaction is allowed to occur between the first exothermic reactant and the second exothermic reactant within the subterranean formation.

Abstract: Disclosed is an underwater robot for a mine flooding rescue, including a starting unit configured to control the implementation of a whole rescue action; a drive unit connected with the starting unit and configured to provide a robot with power to move; and an execution unit connected with the drive unit and configured to salvage underwater life sources.

Abstract: An evaporative cooler for cooling drilling fluid includes a flow pipe having an inner surface in contact with drilling fluid and an outer surface in contact with an evaporative medium. The flow pipe has a serpentine configuration within a transportation frame. A system for cooling a drilling fluid includes a mud circulation system connecting the drilling fluid between a well and a surface where an evaporative cooler is coupled to the mud circulation system and has a serpentine flow pipe in a transportation frame. A method includes pumping heated drilling fluid from a wellbore to an evaporative cooling system, with an evaporative cooler to cool the heated drilling fluid, and sending the cooled drilling fluid back to the wellbore. Another method includes using an intermediate cooler, wherein the intermediate cooler comprises a heat exchanger and an intermediate fluid.

Abstract: This disclosure may generally relate to operations performed in a wellbore. More particularly, systems and methods may be provided for measuring the position of a tool and/or tubular string downhole. The present disclosure may be able to determine an accurate position change in a downhole tool without requiring surface equipment manipulation during measurement acquisition. A position measurement system may comprise a position measurement tool, wherein the position measurement tool comprises a sensor module and a telemetry module; and a marker, wherein the marker emits a signal measured by the sensor module.

Abstract: A downhole tool for connecting with a conveyance line. The downhole tool may be or comprise a connector assembly operable to connect to the line. The connector assembly may include a first connector, a second connector, a latching member, and a rotatable member. The first connector and the second connector may be configured to accommodate the line therebetween. The latching member may be latched against the first connector. The rotatable member may be operatively connected with the latching member such that rotation of the rotatable member with respect to the latching member causes relative axial movement between the latching member and the rotatable member thereby forcing the first connector and the second connector toward each other to compress the line therebetween to therefore connect the connector assembly to the line.

Abstract: Wellbore synthesis techniques are disclosed suitable for use in geothermal applications. Embodiments are provided where open hole drilled wellbores are sealed while drilling in sequenced operations with utilization of phase change materials to form an impervious layer at the wellbore/formation interface in high temperature applications. The techniques may be chemical, thermal, mechanical, biological and are fully intended to irreversibly damage the formation in terms of the permeability thereof. With the permeability negated, the wellbore may be used to create a closed loop surface to surface geothermal well operable in the absence of well casing for heat transfer surfaces for maximizing thermal transfer to a circulating working fluid. Formulations for the working and drilling fluids are disclosed.

Abstract: Methods and apparatus for performing a wellbore operation. A thermal compensator is introduced into a wellbore having a temperature. The thermal compensator comprises an outer layer comprising a first material, an inner layer comprising a second material, and a core disposed between the inner layer and the outer layer; wherein the core comprises a third material. The third material has a higher coefficient of thermal expansion than the first material and the second material. The core contracts when the wellbore temperature is decreasing and the contraction of the core moves the outer layer such that it applies a force to a structure adjacent to the outer layer.

Abstract: Provided is a keyed running tool for use with a slotted orientation apparatus. The keyed running tool, in one aspect, includes a housing, and two or more keys extending from the housing, the two or more keys movable between a radially retracted state and a radially extended state, wherein adjacent ones of the two or more keys are laterally offset from each other and radially offset from each other by Y degrees, wherein Y is 180 degrees or less.

Abstract: This disclosure relates to systems and methods for controlling a motor based on a slide-rotate ratio while drilling a wellbore. The system includes at least one sensor disposable with respect to a drillstring and a motor communicatively coupled to the drillstring. A computing device performs operations for controlling the motor based on the slide-rotate ratio. The computing receives input data corresponding to characteristics of the drillstring, the motor, or both. The computing device calculates a hook load for multiple time intervals. The computing device determines a friction factor based on the hook load for each of the time intervals. The computing device projects a slide-rotate ratio for the motor that substantially minimizes friction while operating the drill string, and controls the motor based on the slide-rotate ratio.

Abstract: An improved wellhead electrical connection assembly utilizing upper and lower retention mechanisms to minimize pressure and fluid leakage in the event of a tubing part or other failure. The upper retention mechanism ensures the connection assembly remains within a tubing hanger. The lower retention mechanism provides a secure connection to a downhole cable that can breakaway without damaging or dislodging other components of the assembly during an emergency event.

Abstract: A downhole catcher for wellbore plunger includes an elongate, hollow body, a plunger catcher plate and a hydraulic actuation assembly. The body can be installed within a wellbore, and defines an interior volume through which a plunger of a plunger lift system can travel from the surface toward the subsurface reservoir. The plunger catcher plate is attached to a downhole end of the body. The plate can transition between a first and plate positions in which a plate axis is perpendicular to and parallel to the body axis, respectively. The plate can, in the second plate position, catch the plunger traveling from the surface toward the subsurface reservoir. The hydraulic actuation assembly is connected to the plunger catcher plate and can transition the plunger catcher plate from the first plate position to a second plate position in response to being hydraulically actuated.

Abstract: The method describes a way of improved oil recovery by the action of the electric field of the DC current and the electromagnetic field on the oil deposit (6) that is on the oil, the mentioned method comprises the following steps: a) Selection of the submerged rock clusters formations that contain the oil; b) Selection of one or more boreholes wells where the method will be applied; c) Extracting oil from at least one well borehole; Considering that the afore mentioned steps of the method further comprise of the following steps: A. Connected steel (17) and/or the upstream production tubing (16) of the boreholes wells with the DC electricity source 1 where the steel casings (17) and/or the upstream production tubing (16) assume the roles of the electrodes (7, 8); B. Connecting an electrical current source (1) with an electromagnetic field source (2); C.

Abstract: A system and method for stall recovery of mud motors may be implemented in a steering control system. The stall recovery system and method may involve automatic detection of a stall of a mud motor during drilling controlled by the steering control system, and may respond to the stall in a rapid and controlled manner to avoid or minimize damage to the mud motor, such as by immediately reducing mud pressure and stopping rotary drilling, if used, faster than a typical human operator could perform. The stall recovery system and method may further take actions to automatically restart drilling.

Abstract: A drilling mud screen comprising: a body having a first end and a second end and a centerline, wherein the first end and/or the second end of the body has a means to engage a drilling mud screen puller/installer tool; a drilling mud inlet at the first end of the body; a filter having a first end, a second end, and openings, wherein the filter is fluidly connected to the second end of the body via a first connection and/or an optional first end retaining ring; a drilling mud outlet at the openings of the filter; and a second end cap fluidly connected at the second end of the filter via a second connection, wherein the filter has an optional retaining ring disposed between the first connection and the second connection is disclosed.

Abstract: A system and method for monitoring fluid flow in a downhole reservoir, characterized by at least one energy source (1), which simultaneously sends two or more utility pulses. The pulse can be a fast propagating and flow-independent acoustic pulse, a somewhat slower propagating and flow-dependent pressure pulse, a slow propagating heat pulse or a slow-propagating tracer pulse. The energy sources are connected via said pulses, without cable, and at least an upper heat source (1?) is connected to equipment on the surface via a cable (4).