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Opportunity

Deep Water

Opportunity
Specific Challenge

Wellhead restrictions create limitations for riser tools in deepwater

REGION

Gulf of Mexico

REGION

Challenge

  • Wellhead restrictions create limitations for riser tools in the deepwater market

Solution

  • Deploy Riser Vali Tech® filter to fit through restrictions near the surface to retain capability for contact with the riser ID

Result

  • Recovered 673 lb of debris in single, short displacement run using Riser Vali Tech® filter

Overview

To address challenges with the increased number of wellhead restrictions in deepwater wells and difficulties with hydraulic debris removal in the riser, our experts developed the Riser Vali Tech® filter. The filter is equipped with a flexible fluid interrupter sleeve (FIS) designed to fit through restrictions near the surface and retain the capability for contact with the riser's internal diameter (ID). With the high operational costs associated with deepwater rigs, the addition of the Riser Vali Tech filter allows the use of riser tools in short trips to verify displacement and debris recovery and limit the amount of string that must be tripped.

Challenge

Many deepwater wells present restrictions in the form of managed pressure drilling (MPD) units and rotating control devices (RCDs) in the wellhead, which can hinder effective wellbore cleanout. Tools must have a hard OD that is smaller than this restriction; however, using standard casing tools alone can lengthen trip times needed to verify well cleanliness and debris recovery.

Solution

The Riser Vali Tech filter provides the most benefit during riser cleanouts with high cross-sectional areas and low annular velocities. The flexible FIS design allows the Riser Vali Tech filter to pass through restrictions and then reengage with the riser ID to divert flow through the collection chamber during filter mode. This enables short displacement runs and allows the riser string to be pulled to verify displacement and debris recovery without pulling the casing tools.

FIS

designed to fit through restrictions near the surface

Short

displacement runs with FIS

Verify

debris recovery w/o pulling the casing tool

673 lb

debris recovered

Result

During these short displacement trips, the wellbore cleanout string is pulled out of hole (POOH) until the riser cleaning tools reach the surface. At this point, the remaining capacity of the Riser Vali Tech filter is noted and debris is collected. If the capacity of the Riser Vali Tech filter is deemed below the threshold for a clean well, jetting tools are added to the string along with the riser tools and tripped back in hole for final cleanout and displacement. 

During displacement trips, the Riser Vali Tech filter has collected up to 673 lb of debris. Final displacement runs have resulted in much more reasonable totals, highlighting the true value of the tool.

 

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