摘要:
The present invention relates to a wireless downhole unit (1) adapted to be lowered into a well (2) in a casing (3) having an inner wall (4) and an inner diameter (Dc). The wireless downhole unit comprises an electrical motor (5), a pump (6), and driving means (7) for allowing movement of the wireless downhole unit within the casing, and at least one battery pack (8). The present invention further relates to a downhole system.
摘要:
The present invention relates to a downhole tool (1) for borehole cleaning or for moving fluid in a borehole. The tool comprises a tool housing (29), a chamber inlet (6) and a chamber outlet (36), and the tool housing comprises a pump (8) arranged in a pump housing (4) and a driving unit powered by an electrical conducting means for driving the pump.
摘要:
The present invention relates to a propelling tool (1) enabling a forward drive for operation in a pipeline (3), a casing, a well, or any other cavity. The propelling tool comprises a supply tubing (4) containing the supply fluid, a housing (5) connected to the supply tubing having a supply inlet provided in the rear end of the housing for supplying pressurized supply fluid from the supply tubing, a supply outlet provided in the rear end of the housing for ejection of the supply fluid, a suction inlet provided in the front end for an intake of cavity fluid surrounding the tool into the housing, and a suction outlet provided in the rear end for an outlet of cavity fluid, and a pump (10) for suction of cavity fluid in through the suction inlet and out through the suction outlet. The pump is driven by the pressurized supply fluid for pulling the tool forward in a cavity.
摘要:
The present invention relates to a punching tool for providing a hole or a dimple in a metal casing in a borehole. The punching tool comprises a tool body having an axial extension, and a punching unit connected with the tool body comprising: a fluid inlet, a punch movable between a retracted and a projected position and extending substantially radially in relation to the axial extension, and at least one hydraulic punch cylinder moving the punch between the retracted and the projected position. The present invention further relates to a method for providing a hole or a dimple in a metal casing downhole and to a method for installing a plug in an existing hole in the casing downhole.
摘要:
The present invention relates to a stimulation method comprising the steps of arranging a fluid-activated gun in a well through a well head and/or a blowout preventer, dividing the well into a first and a second part, the first part being closer to the well head and/or blowout preventer than the second part, pressurising the first part of the well with a hot fluid, the hot fluid having a temperature which is higher than the temperature of the formation at a downhole point of injection, activating the fluid-activated gun, thereby converting energy from the pressurised hot fluid into mechanical waves, directing said mechanical waves into the formation, and injecting the hot fluid into the formation simultaneous to activation of the fluid-activated gun by means of the hot fluid. Furthermore, the present invention relates to a stimulation system for stimulation of oil production in an oil field.
摘要:
The present invention relates to a disconnecting tool (1) for disconnecting a drill pipe from a lower casing in a bore-hole and having an axial extension along a centre line (2), comprising an axial force generator (4) comprising a first part (5) and a second part (6) and providing an axial movement of the second part in relation to the first part along the axial extension, a wireline (3) powering the axial force generator, and an element (7) comprising a leading part (8) and a trailing part (9), the second part being connected with the trailing part, wherein a fluid channel (10) extends from the leading part to the trailing part for letting fluid through or pass the element when the second part is moved in relation to the first part of the force generator during disconnection.
摘要:
The present invention relates to a downhole hydraulic pump for providing fluid pressure during downhole operations, comprising a pump housing, a cam shaft rotatably arranged in the pump housing and having a longitudinal spin axis, the cam shaft comprising a shaft and a cam lobe arranged on the shaft, a radially arranged piston having a housing end and a cam end, a piston housing arranged in the pump housing, an inlet valve arranged in an inlet in the piston housing, an outlet valve arranged in an outlet in the piston housing, and a piston spring arranged in the pump housing for moving the piston away from the piston housing, wherein the piston housing is rotatably connected to the pump housing enabling rotation of the piston housing around a piston housing rotation axis parallel to the longitudinal spin axis of the cam shaft.
摘要:
The present invention relates to a formation fixation device for securing a tubular in an open-hole wellbore, the formation fixation device comprising a tubular part, a fixation unit and a fluid passage. Furthermore, the invention relates to a downhole fixation system for securing a casing comprising a first end and a second end in an open-hole wellbore and to a method of permanently fixating a tubular part in an open-hole wellbore as well as to use of a formation fixation device according to the invention for fixating a tubular part in an open-hole wellbore.
摘要:
The present invention relates to a downhole tool comprising a tool housing, an electronics assembly comprising an electronic module located within the housing, wherein the electronics assembly further comprises a plurality of transistor elements being electrically connected with the electronic module and being arranged on a thermal member which is thermally connected with the housing, wherein the electronic module is thermally insulated from the thermal member. Furthermore, the invention relates to a downhole system comprising a wireline, a tool string, and a downhole tool according to the invention.
摘要:
The present invention relates to a casing module for being part of a downhole casing system, comprising a base pipe extending in a longitudinal direction and having a circumference, a functional assembly mounted over the base pipe to define a casing module flow path between the functional assembly and the base pipe, and a main flow path arranged substantially in a centre of the base pipe and extending in a longitudinal direction of the casing system, wherein at least a part of the casing module flow path is an annular flow path extending both in the longitudinal direction of the base pipe and continuously around the entire circumference of the base pipe, and the base pipe has end sections at which a plurality of supporting structures protrude from an outer surface to provide support for the functional assembly, the supporting structures defining a plurality of casing module flow paths extending in the longitudinal direction. The present invention furthermore relates to a downhole casing system for performing operations in a wellbore containing well fluid.