A hydraulic drilling system and method for drilling a borehole from a wellbore are disclosed. The system comprises a whipstock that is selectively rotatable about the central long axis of the work string, for repositioning the whipstock exit radially, without extracting the whipstock or the workstring from the wellbore. The system includes an extendable and contractible second work string for absorbing any axial forces on the work string. The system may also include a positional measurement device and the distal end of the drill tubing may be selectively steerable. The system may be used to drill a plurality of boreholes from the same wellbore. In one aspect of the method, an earth measurement device and/or an earth manipulation device is placed downhole.

A hydraulic drilling system and method for drilling a borehole from a wellbore are disclosed. The system comprises a whipstock that is selectively rotatable about the central long axis of the work string, for repositioning the whipstock exit radially, without extracting the whipstock or the workstring from the wellbore. The system includes an extendable and contractible second work string for absorbing any axial forces on the work string. The system may also include a positional measurement device and the distal end of the drill tubing may be selectively steerable. The system may be used to drill a plurality of boreholes from the same wellbore. In one aspect of the method, an earth measurement device and/or an earth manipulation device is placed downhole.

The present invention relates to a downhole tool for projecting a projectable element downhole in order for the tool to perform an operation in a well, comprising a tool body having a tool outer diameter and a longitudinal extension, a radial bore extending in a radial direction perpendicular to the longitudinal extension, the radial bore having a first bore part having a first inner diameter and a second bore part having a second inner diameter being larger than the first inner diameter, a projectable element arranged and forming a piston in the radial bore, the projectable element having an open first end and a closed second end, the projectable element having a retracted position and a projected position where the second end is projected from the first bore part, the projectable element comprising at the second end a first element part having a first outer diameter corresponding to the first inner diameter and a second element part having a second outer diameter corresponding to the second inner diameter, in the retracted position the projectable element and the second bore part define an annular cavity closed by the second element part, a hollow base part having an open end and a closed end, the open end extending into the open first end of the projectable element forming a chamber therebetween, the open end of the hollow base part having an outer diameter which corresponds to an inner diameter of the projectable element, at least one spring element arranged in the chamber and connected to the closed first end of the projectable element and to the closed end of the hollow base part for retraction of the projectable element, a pump configured to pump fluid into the chamber via a fluid channel to move the projectable element into the projected position, wherein the annular cavity is filled with fluid which leaves the annular cavity as the projectable element change to the projected position minimising the annular cavity. The present invention also relates to a downhole tool string comprising the downhole tool and a driving unit for propelling the tool string forward in the well.

A mechanical perforator includes a perforator module and a slip module. The perforator module has perforator blades that may be forced outwardly to perforate a well casing joint after slips of the slip module has been deployed to bite the well casing and anchor a lower end of the mechanical perforator in the well casing.

An annular pressure activated downhole tool has a housing including an outer surface, an inner surface defining a passage, an annular projection projecting into the passage from the inner surface, and an opening. A mandrel extends into the passage. The mandrel has a first end and a second end. A power spring support is detachably connected to the second end of the mandrel in the passage. A power spring is arranged about the mandrel and extends between the power spring support and the annular projection. A trigger housing is arranged in the power spring support. A trigger arranged in the trigger housing selectively engages with the inner surface. The trigger is operable to disengage from the inner surface of the housing, releasing the power spring, and shifting the mandrel along the passage when exposed to a selected annular pressure.

Systems and methods of the present disclosure relate to protecting a control line as it passes through a junction in a downhole environment. An ETJ deployment tool (ETJDT) comprises a tool body comprising a central bore; at least one first component and at least one second component, each component operable to extend and retract laterally from the tool body, wherein the at least one second component is disposed at an axial distance from the at least one first component along the tool body; a member disposed within the central bore and operable to move forward upon receiving fluid; and a spring disposed axially between a portion of the member and the at least one second component.

An annular pressure activated downhole tool has a housing including an outer surface, an inner surface defining a passage, an annular projection projecting into the passage from the inner surface, and an opening. A mandrel extends into the passage. The mandrel has a first end and a second end. A power spring support is detachably connected to the second end of the mandrel in the passage. A power spring is arranged about the mandrel and extends between the power spring support and the annular projection. A trigger housing is arranged in one of the mandrel and the power spring support. A trigger arranged in the trigger housing selectively engages with the inner surface. The trigger is operable to disengage from the inner surface of the housing, releasing the power spring, and shifting the mandrel along the passage when exposed to a selected annular pressure.

An annular pressure activated downhole tool has a housing including an outer surface, an inner surface defining a passage, an annular projection projecting into the passage from the inner surface, and an opening. A mandrel extends into the passage. The mandrel has a first end and a second end. A power spring support is detachably connected to the second end of the mandrel in the passage. A power spring is arranged about the mandrel and extends between the power spring support and the annular projection. A trigger housing is arranged in one of the mandrel and the power spring support. A trigger arranged in the trigger housing selectively engages with the inner surface. The trigger is operable to disengage from the inner surface of the housing, releasing the power spring, and shifting the mandrel along the passage when exposed to a selected annular pressure.

Systems and methods of the present disclosure relate to protecting a control line as it passes through a junction in a downhole environment. An ETJ deployment tool (ETJDT) comprises a tool body comprising a central bore; at least one first component and at least one second component, each component operable to extend and retract laterally from the tool body, wherein the at least one second component is disposed at an axial distance from the at least one first component along the tool body; a member disposed within the central bore and operable to move forward upon receiving fluid; and a spring disposed axially between a portion of the member and the at least one second component.

A gripper assembly for anchoring a tool within a downhole passage and for possibly assisting movement of the tool within the passage. The gripper assembly includes an elongated mandrel and flexible toes that can be radially displaced to grip onto the surface of the passage. The toes are displaced by the interaction of a driver slidable on the mandrel and a driver interaction element on the toes. In one embodiment, the toes are displaced by the interaction of rollers and ramps that are longitudinally movable with respect to one another. In another embodiment, the toes are displaced by the interaction of toggles that rotate with respect to the toes.