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Extreme High Pressure and Temperature CT Connector and Check Valve

IP.com Disclosure Number: IPCOM000234999D
Publication Date: 2014-Feb-21
Document File: 2 page(s) / 36K

Publishing Venue

The IP.com Prior Art Database

Abstract

The present disclosure proposes a CT connector and DFCV which do not rely on elastomer seals to keep the wellbore fluid from entering the CT

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Extreme High Pressure and Temperature CT Connector and Check Valve

Introduction

For almost every Coiled Tubing (CT) job a CT connector is used to connect the CT to a bottom hole assembly (BHA). Many different types are available on the market for all different CT sizes and BHA sizes. A second BHA component which is used on almost every CT job is the double flapper check valve (DFCV). This device keeps wellbore fluid and pressure from entering the CT and migrating back to surface.

Oil companies are drilling more demanding wells and requesting that service companies be able to service these wells. Some of the new challenges facing both parties are in terms of bottom hole pressure and temperature, in which wells are reaching BHP of 22,000 psi and BHT of 500 F. Standard coiled tubing tools are not able to withstand these pressures and temperatures as existing designs use elastomers that do not hold up. This patent memo contains a novel solution to the problem.

Prior Art

Different types of CT Connectors available on the market today.

Rugged Connector Patent Application


System and method for forming a coiled tubing connection - US2011/089685 A1

Summary of the Invention

The present disclosure proposes a CT connector and DFCV which do not rely on elastomer seals to keep the wellbore fluid from entering the CT.

Detailed Description of the Invention Including Examples and Drawings

The Extreme HPHT CT connector is very similar to a previous design called the rugged CT connector.

The Extreme HPHT CT connector is made up of three main parts, the connector body, load housing and soft seals. The example shown here and the main market for this connector is 1-3/4 CT and 2-1/8 BHA, however the idea could be adapted to any CT and BHA OD size. Figure 1 sh...