Apparatus, Module, Device and Method for Shearing Objects

Abstract

An apparatus, a module, a device and a method for shearing objects are disclosed. The apparatus is configured for insertion into a borehole. The apparatus comprises: a primary axis; a movable shearing means; and a deflecting means. The deflecting means and the movable shearing means are mutually configured such that, when the movable shearing means is driven by a driving force in a direction parallel to the primary axis, the movable shearing means slides along the deflecting means and at least a portion of the movable shearing means is deflected in a direction towards to the primary axis.

Description

FIELD OF THE INVENTION[0001]Embodiments of the present invention relate to an apparatus, module and device for shearing. In particular, though without prejudice to the foregoing, certain embodiments relate to an apparatus, module, device and method suitable for use down boreholes or wellbores of oil, gas or geothermal wells, wherein the apparatus configured to be inserted therein to remotely shear objects passing through the apparatus such as tubing and / or wirelines.BACKGROUND TO THE INVENTION[0002]Surface Pressure Control Equipment (PCE) and surface Blow Out Preventers (BOP) can include multiple surface shear rams to cut coil tubing or wireline passing therethrough. Such shearing devices use shear rams which are driven by horizontally aligned hydraulic pistons. Such shearing devices are physically too large to operate down hole below a rotary table and are designed for surface use only.[0003]Subsea safety tools, such as a Sub Sea Test Tree (SSTT) are either unable to cut / shear larg...

AI Technical Summary

Benefits of technology

This invention allows for the use of a driving mechanism that is aligned with the main direction of the apparatus, which makes the apparatus smaller in size. This results in a cylindrical shape, allowing it to fit in tight spaces such as underground equipment or at the seabed. The apparatus can also be used to cut and remove objects within a landing string, which protects the safety valves above it.

Problems solved by technology

Such shearing devices are physically too large to operate down hole below a rotary table and are designed for surface use only.

Subsea safety tools, such as a Sub Sea Test Tree (SSTT) are either unable to cut / shear larger size coil tubing passing therethrough (for example coil tubing whose external diameter is greater than 2 inches / 50.8 mm) or are prone to sustaining damage to their sealing faces when attempting to cut coil tubing of such a diameter.

If the subsea safety tool is unable to sever the coil tubing, there is no ability to pull the coil tubing out of the landing string before master valves, e.g. in the PCE or BOP are closed.

If damaged is sustained due to forces applied to the SSTT during a shearing process, this might compromises the sealing integrity of the SSTT which is one of its primary functions.

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