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Apparatus and method for controlling a downhole device

A technology for equipment and control tanks, which is applied in the direction of drilling equipment, wellbore/well valve devices, drilling automatic control systems, etc.

Active Publication Date: 2014-09-17
NXG TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods also limit the number of possible open / close cycles because the number of balls that can be landed and held in the ball catcher (ball catcher) is limited, and once the ball catcher is full, the tool must be pulled back surface and the ball catcher must be emptied before the tool can be reset

Method used

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  • Apparatus and method for controlling a downhole device
  • Apparatus and method for controlling a downhole device
  • Apparatus and method for controlling a downhole device

Examples

Experimental program
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Embodiment Construction

[0063] Referring now to the accompanying drawings, figure 1 A first example of a device for controlling a downhole tool according to the invention is shown in cross-sectional view. figure 1 The shown device comprises a control sub 1 having a main body 5 with male and female joint connections at respective ends adapted to connect the main body 5 into the string of an oil or gas well. Normally the column may comprise several tubular devices connected end to end above and below the control device 1 . As shown in the drawings, in this example the device 1 is attached in a column such that the left end of the body 5 is furthest down the hole and the right end of said body 5 is closer to the ground, but In other examples different arrangements may be employed. The body 5 has a central bore 5b with three upwardly facing shoulders, a first shoulder 6u adjacent the upper end, a second shoulder 61 adjacent the lower end, and a smaller intermediate shoulder 6m. A hole 5 b passes betwe...

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PUM

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Abstract

Apparatus for controlling a downhole device in a well has a body with a control slot and pin movable in the slot. The slot has a first inactive loop in which the pin can cycle between different idling configurations, and a second active loop in which the pin can move between different configurations which correspond to active and inactive configurations of the downhole device. The pin can be switched between the first and second loops, and can cycle between the different configurations within without switching between the different loops. The slot can be provided on a piston, and the axial movement of the piston in the bore can drive the relative movement of the pin and the slot.

Description

technical field [0001] The present invention relates to apparatus and methods for controlling downhole devices. Background technique [0002] It is necessary to control the operation of downhole valves and other tools from the surface. It is often necessary to open and close valves or other downhole tools at various stages of drilling, operation and maintenance of a wellbore, thus there is a need for a controller that enables remote opening and closing of valves in the well. [0003] Activation and deactivation of downhole devices typically involves steps such as dropping an activating or deactivating ball from the surface. One drawback of these methods is that the time between dropping the ball from the surface and landing the ball on the designated tool seat is a variable factor in this method. For very long wells, for example, it can take up to 40 minutes to turn the tool on and another 40 minutes to land the second ball to turn the tool off. These methods also limit t...

Claims

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Application Information

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IPC IPC(8): E21B21/10E21B23/00E21B34/10
CPCE21B34/10E21B44/005E21B23/006E21B21/103E21B21/10E21B23/04E21B23/06
Inventor K·马霍茨基
Owner NXG TECH LTD