This application relates to systems and methods for stimulating hydrocarbon bearing rock formations using a downhole hybrid tool for discharging a fracturing solution to a wellbore in the formation and for delivering an output laser beams to the rock formation.

A piston initiator is used on an assembly having a milling tool and a whipstock for creating a sidetrack in a wellbore. A piston disposed in an uphole position in a bore of the milling tool seals the bore from communicating with the port. A line from the port can communicate pressure to components on the whipstock for initiating their activation. The piston is movable from the uphole position, but is held by a releasable connection configured to release the piston in response to a predetermined force from fluid flow in a downhole direction against an exposed surface area of the piston. An uphole shoulder in the milling tool prevents movement of the piston in an uphole direction so the piston does not stress the releasable connection in response to reverse fluid flow through the milling tool.

Provided are cement plugging apparatuses and methods of use. An example cement plugging apparatus comprises a detachable plug fundament assembly comprising: a throughbore, a first plurality of wiper elements, and a second plurality of wiper elements. The examples cement plugging apparatus further comprises a cement diverting assembly coupled to the plug fundament assembly, wherein the cement diverting assembly comprises: a plurality of hoses, a body, a throughbore in the body, and a plurality of flow paths extending through the body and having openings for each individual flow path in the throughbore; wherein each individual hose in the plurality is coupled to an individual flow path in the plurality; and wherein each individual hose in the plurality extends away from the body of the cement diverting assembly.

A system for securing at least one flow control device, FCDs, to a pipe used for producing hydrocarbons from a subterranean reservoir comprises a strap provided over the pipe and over the at least one flow control device.

A method and apparatus for cleaning a wellbore. The apparatus is a jet sub including an engine, a flow diverter and mixing throat. The engine propels a driving fluid at a first end of the jet sub towards a second end of the jet sub along a longitudinal axis of the jet sub. The flow diverter redirects the driving fluid by an redirection angle that is an obtuse angle. The mixing throat receives a mixed fluid including the driving fluid from the flow diverter and induced fluid drawn into the mixing throat by the driving fluid. The mixed fluid is injected into an annulus of the wellbore at the obtuse angle.

Provided, in one aspect, is a fluid flow device. The fluid flow device may include a housing having at least one fluid inlet and at least one fluid outlet. The fluid flow device according to this aspect may further include a flexible tube positioned within the housing, the flexible tube defining a fluid flow path, the flexible tube operable to have a first diameter (d.sub.1) when the flexible tube encounters a first pressure from fluid within the housing and a second different diameter (d.sub.2) when the flexible tube encounters a second greater pressure within the housing, the first diameter (d.sub.1) and second different diameter (d.sub.2) configured to provide a constant flow of the fluid out of the at least one fluid outlet.

A flow management and separation system for a horizontal wellbore having a primary artificial lift device having an intake has (a) a sealed central flowpath from a fluidseeker weighted keel inlet, through a recovery flow tube, a seal bore extension and a dip tube having a pump intake sealing assembly in fluid communication with the lift device intake; and (b) a mixed fluid flow path from a fluidseeker internal bypass passage, through an annulus of at least one slug catcher comprising a perforated shell.

A mechanical automatic vertical drilling tool, with ends that are connected with an upper drilling tool and a bit by a detachable thread, is disclosed. The tool comprises a control device, an actuator and an auxiliary part. The control device detects status of wellbore and controls operations of the actuator when the wellbore leans. The actuator pushes a block out against the well wall to generate a radial force, which pushes against the drill bit to prevent deviation and modify the wellbore trajectory. The auxiliary part transmits the indispensable bit pressure and torque for drilling to assist the control device and the actuator to achieve the function. This disclosure can get automatic deviation correction with only mechanical structures. It is simple and reliable, and unlikely to fail in complicated wells without any manual operation.

A method of drilling a wellbore that traverses a formation, the method comprising the steps of inserting a one-stage drilling tool into the wellbore, the one-stage drilling tool comprising a laser head configured to produce a drilling beam, a completion sheath configured to line the wellbore, and a centralizer configured to support the completion sheath within the wellbore, operating the laser head to produce the drilling beam, wherein the drilling beam comprises a laser, wherein the drilling beam has a divergent shape comprising a base at a distance from a front end of the laser head and an apex proximate to the front end of the laser head, wherein a diameter of the base of the drilling beam is greater than a diameter of the one-stage drilling tool, and drilling the formation with the drilling beam, wherein the laser of the drilling beam is operable to sublimate the formation.

An apparatus for cleaning the area around a casing of a wellbore is described. The apparatus comprises a body configured to be located in a wellbore casing, the body defining an internal chamber for receipt of pressurised fluid. Pistons are mounted in the body and is arranged to move from an inwardly retracted condition to an outwardly deployed condition as a result of an increase in fluid pressure in the internal chamber. Pistons further comprise at least one first nozzle arranged to direct a jet of pressurised fluid from the apparatus.