Perforated pipe and apparatus, system and method for perforating a pipe

Abstract

A pipe and system for forming perforations in a pipe are provided. The pipe is for a well bore for filtering materials transported through the pipe and comprises: a wall having an exterior surface and an interior surface, the wall forming the pipe and shaped in a cylinder; and a perforation located in the wall, the perforation for receiving sediment in the materials and forming an aperture in the wall from the exterior surface to the interior surface with a first opening on the exterior surface having a first dimension across a first major axis of the first opening and a second opening on the interior surface having a second dimension across a second major axis of the second opening. The first opening is shaped to be either round, oval, elliptical or racetrack.

Description

FIELD OF DISCLOSURE[0001]The disclosure describes generally a perforated pipe and an apparatus and a method for perforating a pipe to form at least one perforation therein. In one application, the pipe is for use in the production of oil from formations that contain heavy oil or tar sands.BACKGROUND OF DISCLOSURE[0002]In tar sands and heavy oil recovery, a pipe, being a casing, tubing or other liner, is typically installed in a well bore for production of oil from an underground formation or producing zone. The pipe is preferably perforated or slotted with multiple longitudinal slots about its circumference before placement in the well bore. The pipe may be referred to as a slotted liner. A desired length and width of the slots perforated in the pipe and a desired number of slots depend upon various factors, including the granular size of any sand in the formation, the minimum strength and integrity of the pipe required for the particular application or use of the pipe and the rate ...

AI Technical Summary

Benefits of technology

The patent describes a new type of perforated pipe used in oil production from formations containing heavy oil or tar sand. The pipe has slots that allow for effective flow into the pipe from outside, while still maintaining the strength of the pipe. The slots are formed by cutting into the pipe using a saw with a circular blade. The new type of pipe has conical perforations, which are wider and deeper than traditional slots, to prevent clogging and to allow for better flow. The slots are also designed to prevent sand and other particles from getting inside the pipe and causing damage. The patent also describes a method for manufacturing this new type of pipe. Overall, the patent aims to improve the performance and durability of perforated pipes used in oil production.

Problems solved by technology

Current slot forming techniques and slot formations may overly weaken the strength of the pipe.

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