Casing Reconnect

Metal-to-metal, gas-tight casing repair system

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Overview

Remediate damaged, stuck, or cut casing without lengthy fishing operations or costly sidetracks

Casing Reconnect™ metal-to-metal, gas-tight casing repair system is an ISO 14310 V0-rated, full-axial-load-bearing reconnection solution that seamlessly addresses stuck or damaged casing. It provides a robust, cost-effective remediation solution for the life of the well. With no reduction in ID, it can also be used to realign space-out.

When subsea wellhead or mudline suspension systems require a workover, a subsea tieback may be installed between the wellhead and the rig to assist with landing out the tieback string. The Casing Reconnect system allows space-out flexibility with a high-integrity seal to enable safer workover activities.

Pressure rating up to 7,985 psi [55 MPa]

Temperature rating up to 302 degF [150 degC]

Axial load rating up to 1,500,000 lbf [6.7 MN]

Casing Reconnect metal-to-metal, gas-tight casing repair system with a cutaway view of the receptacle.

Casing Reconnect

Metal-to-metal, gas-tight casing repair system

Applications

Cut and pull stuck casing above the stuck point and reconnect to the casing stub
Reestablish the integrity of corroded, collapsed, or leaking casing that cannot be repaired by an expandable steel patch
Efficiently replace or repair the casing hanger, wellhead, or both
Reinstate exploration, temporarily plugged and abandoned, or previously decommissioned wells
Connect subsea wellheads to surface
Onshore, offshore, and subsea wells

Benefits

Keeps drilling programs on schedule by eliminating the need for lengthy fishing operations or costly sidetracks
Provides robust seal for the life of the well
Allows fullbore access after installation

Features

Metal-to-metal, nonelastomeric, gas-tight sealing and anchoring technology
ISO 14310 V0 rated
No limits on installation depth
Compliant with NACE MR0175 for sour service

Case Studies

Well schematic shows 1 of 2 cut casing strings reconnected to surface with gas-tight seals for well reentry.

Case Study

Gas-tight Reconnection to Surface Enables Reentry into Abandoned Exploration Wells and Avoids Redrilling

Schematic shows leak near the liner top and the Casing Reconnect system solution.

Case Study

North Sea Operator Avoids Sidetrack by Replacing Leaking Liner Hanger

Schematic of damaged casing strings and after repair with a cement squeeze and the Casing Reconnect system.

Case Study

Eni Saves 3 Months of Rig Time By Avoiding Sidetrack

Well schematic showing the 9 5/8-in casing hanger seal and casing section that were replaced.

Case Study

Casing and Hanger Repair Enabled by Gas-Tight Reconnection to Surface Averts Sidetrack

FAQs

How does it work?

During the life cycle of the well, the wellhead or casing may be damaged or deemed no longer suitable for the well design. Alternatively, during drilling operations, the casing may become stuck at a point close enough to the intended landing depth to remain viable. In these situations, using the Casing Reconnect system enables cutting the casing anywhere between the wellhead and the top of cement or stuck point and subequently pulling it out. Replacement casing is then run with a Casing Reconnect system receptacle on the bottom—correctly spaced out with the casing hanger. The casing stump is morphed into the receptacle to rejoin the two strings with a high-axial-load-bearing, metal-to-metal seal. The system accommodates excess swallow at the connection, greatly simplifying space-out for correctly landing the hanger.