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A Concept for a Ratcheting Distributor Valve

IP.com Disclosure Number: IPCOM000237886D
Publication Date: 2014-Jul-17
Document File: 2 page(s) / 25K

Publishing Venue

The IP.com Prior Art Database

Abstract

The concept for a ratcheting distributor valve addresses the need for supporting higher pressure differentials downhole during well testing operations by distributing pressure across multiple packers during well flow, while also preventing tubing to annular communication during initial flow and shut in periods. This can be achieved by using a ratcheting valve system, where a valve toggles between active and inactive positions.

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A Concept for a Ratcheting Distributor Valve Abstract:

The concept for a ratcheting distributor valve addresses the need for supporting higher pressure differentials downhole during well testing operations by distributing pressure across multiple packers during well flow, while also preventing tubing to annular communication during initial flow and shut in periods. This can be achieved by using a ratcheting valve system, where a valve toggles between active and inactive positions.

Description:

The design of test tools for well testing environments always presents new challenges. Higher pressures and higher temperatures continually increase the demand for redesigns and new ideas. Faced with a challenge to have a large differential across packer elements in an open hole environment, solutions in the past has been to run two packers and use a sliding sleeve in between which can distribute the differential pressure across the elements allowing each packer element to hold significantly less pressure than the full differential. This sliding sleeve device has been called a distributor valve.

Previous designs of distributor valves incorporate a spring type mechanism sensitive to tubing pressure to open and close. When the tubing pressure increases to a predetermined level, ports will open allowing for tubing to annulus communication. Once this pressure drops below the predetermined pressure, which is defined by setting the spring preload, the sliding sleeve will close and prevent annulus to tubing communication.

Once both packers are set the operators will begin to flow the well. Depending on the flow rate, the tubing pressure can drop significantly and the distributor valve...