A downhole tool control apparatus includes a control assembly, a stroking assembly, and a pocket sleeve positioned in an outer sub. The control assembly and stroking assembly are independently slidable axially within the outer sub. The control assembly and stroking assembly slide depending on the flow rate of fluid through the downhole tool actuator. The stroking assembly includes a spline barrel having a spline projection positioned within a spline pocket formed in the pocket sleeve. The pocket sleeve and control assembly include one or more ratchet teeth positioned in the pocket sleeve such that as the flow rate is changed between a high and a low flow rate, the spline projection engages the ratchet teeth until an actuated cycle is completed, allowing the downhole tool actuator to move to an actuation position.

A second mandrel is mounted to a first mandrel and is moveable longitudinally relative to the first mandrel among a plurality of index positions. A first-part magnetic element is coupled to the second mandrel. A plurality of second-part magnetic elements is coupled to the first mandrel at respective positions. The first-part magnetic element is adjacent to a respective one of the plurality of second-part magnetic elements when the second mandrel is at a respective index position. A threshold force F on the second mandrel applied for a threshold time T is required to displace the first-part magnetic element from the respective second-part magnetic element sufficiently that the first-part magnetic element will not return to be adjacent to the respective second-part magnetic element when the force F is removed.

A well tool to be oriented and secured in a wellbore without the external application of torque, and a well system incorporating the same. After installation of orientation casing and universal latch coupling casing, the self-orienting selective lockable latch well tool is run downhole to the target depth, picked up to free the internal locking mechanism, and then loaded with downhole stress to engage the locking mechanism.

A downhole tool having an indexing apparatus for actuating the downhole tool from the surface by applying a pre-determined number of hydraulic pressure signals to the downhole tool. The downhole having an outer tubing that has an outer surface and an inner surface, the inner surface defining an inner region of the outer tubing. The downhole tool includes a sliding sleeve positioned within the inner region of the outer tubing, the sliding sleeve being slideable relative to the outer tubing. The sliding sleeve including a first magnet and a second magnet that are positioned in an opposing orientation relative to one another for providing a reference point detectable via a magnetometer at a surface of a wellbore. An indexing position of the downhole tool being determined by comparing a location of the reference point on the sliding sleeve to a location of a fixed point on the outer tubing.

A downhole tool having an indexing apparatus for actuating the downhole tool from the surface by applying a pre-determined number of hydraulic pressure signals to the downhole tool. The downhole having an outer tubing that has an outer surface and an inner surface, the inner surface defining an inner region of the outer tubing. The downhole tool includes a sliding sleeve positioned within the inner region of the outer tubing, the sliding sleeve being slideable relative to the outer tubing. The sliding sleeve including a first magnet and a second magnet that are positioned in an opposing orientation relative to one another for providing a reference point detectable via a magnetometer at a surface of a wellbore. An indexing position of the downhole tool being determined by comparing a location of the reference point on the sliding sleeve to a location of a fixed point on the outer tubing.

An operating system for a barrier valve or safety valve is responsive to increments in annulus or tubing pressure. An indexing device controls valves that selectively direct pressure applied to one side of an operating piston or the other for attaining the open and closed positions of the barrier valve. One such indexing device can be a j-slot. Other devices that operate a pair of hydraulic valves in tandem for pressure direction to one side of an actuation piston or another are contemplated. The system needs no electric power and there are no control lines needed to run below the production packer in the case of using annulus pressure to actuate the piston or at all if access to tubing pressure is provided from the vicinity of the barrier valve components.

A method of latching a production tubing to a packer in a wellbore, an assembly, and a connection, of which the method includes lowering the production tubing into the wellbore, the production tubing being coupled to a first body comprising a slot and a blocking member. The production tubing is lowered until a lug on a second body contacts the blocking member, the second body being coupled to a packer. The method includes raising the production tubing relative to the packer which causes the lug to move out of contact with the blocking member, lowering the production tubing into the wellbore again until the lug contacts and removes the blocking member, and rotating the production tubing such that the lug advances into the slot, so as to latch the production tubing and the packer together.

A downhole tool having a diverter component for directing fluids in different directions within a wellbore. The diverter component has an outer pipe which forms part of the downhole string. The pipe has a through channel and holes through the wall of the pipe. Within the pipe is a sleeve which can be moved. In one position, the sleeve blocks the wall holes and allows fluid to pass through the channel of the pipe. The diverter component may be used in conjunction with packers to seal off sections of the wellbore. The diverter and packer assembly could be used to introduce acid into particular portions of the wellbore.

Some examples of the present disclosure relate to a method for washing an annulus that at least partially surrounds a casing in a well. The method comprises locating a tool inside a wellbore casing, and flowing a washing fluid from an injection aperture on the tool and into the annulus via a first casing aperture in the casing. An inflow region of the casing is created having a reduced pressure relative to the annulus, and the method involves flowing the washing fluid from the annulus and into the inflow region of the casing through a second casing aperture in the casing.

A system includes a retrievable string for use in a completion string of a well, the completion string including an electrical stator. The retrievable string is to be disposed in the completion string, the retrievable string including a rotor for receipt within the electrical stator and to rotate in response to electromagnetic fields generated by the stator, an impeller coupled to the rotor, a housing to surround the impeller, and a recirculation isolator coupled to the housing. The recirculation isolator includes a sealing element and a locking tool, where the sealing element sealingly engages with the completion string, and the locking tool positions the retrievable string in the completion string and detachably couples the retrievable string to the completion string. The locking tool includes a rotational locking feature to engage an indexing receptacle of the completion string.