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North Sea Well Access Restored Through Intelligent Wireline Intervention Well-Safe Solutions Recovers 11,575 ft of Slickline Lost in a Well After 15 Years Collection of data with minimal pressure loss in flowing wells Contingency barrier option on high-value subsea wells Recovery of magnetic junk in high temperature wells Hard scale removal at multiple obstruction points Retrieval of equipment lost in the well and fast-track production restart High deviation, heavy-duty fishing, North Sea Recovery of safety valve lockout tool which had parted downhole Retrieval of sub-surface safety valve (SSSV) with damaged fish neck Retrieval of injection valve backed off from 7-in retrievable bridge plug Trial deployment of slickline-set SIM plugs and Peak latch/seal micro coil stinger Data acquisition to monitor pressure buildup in a shut-in well Bespoke activation tool design Evaluation of an e-line deployed tractor, stroker, and slickline toolstring Trial test to remove hard scale from production tubing using mechanical means Cut wire at rope socket to retrieve stuck toolstring Retrieval of injection valve from tubing crossover at 10,400 ft High-deviation fishing at depth in the Middle East Isolation of failed inflow valve at high deviation Location and stabilization of a leak path in the completion string Innovative use of an LWIV to perform first subsea slickline intervention in Nigeria Efficient straddle solution enables repair of production Christmas tree Permanent plug keeps P&A project moving Peak eCutter facilitates faster stuck toolstring recovery in long-reach, highly-deviated well Retrievable sand screen anchoring system eliminates leaks > Mechanical scale removal saves USD 250,000 PTTEP gas lift straddle conversion restores oil production for mature well Slickline-deployed plug isolates damage to avoid workover KOC restores oil production to 800 bbl/d using digital-slickline-conveyed straddle system D-Set setting tool and DSL digital slickline cable set large-bore gauge hanger in monobore well Retrievable bridge plug enables proper tubing cut and saves 4 rig days, Congo Remote Intervention Operation Enables Effective Planning of Plug and Abandonment Campaign Shell Removes 900-ft Parted Wireline from North Sea Well Setting a Critical Well Barrier in Tubing with Damaged Nipple Profiles

Mechanical scale removal saves USD 250,000

Using Torque-Action Debris Breaker tool instead of coiled tubing operation significantly reduces well intervention time.

Al Khafji Joint Operations (KJO) efficiently broke hard calcite scale using the Torque-Action Debris Breaker wellbore cleanup and debris removal tool to save USD 250,000 in well intervention costs.

KJO's challenge: restore full wellbore accessibility

KJO encountered obstructions in 3.5-in tubing at 2,100 ft, 3,050 ft, and 3,500 ft during routine pressure and temperature surveys. The operation required an efficient mechanical tool to clean out extensive accumulated scale bridging a vertical production string and restore full wellbore accessibility. The well was previously shut down from operations for five years.

What was considered

The operator considered using a coiled tubing unit or workover rig to clear the scale and debris but sought a more cost-effective solution.

Schlumberger solution: break up sand and scale

The Torque-Action Debris Breaker tool from Peak Well Services with 1.9-in to 2.5-in subs breaks up concretions of sand and scale.

What KJO achieved: reduce inventory and descaling time

KJO deployed a Torque-Action Debris Breaker tool on slickline to jar down in the well and apply a short-duration torque via the helically split torque sub. The tool enabled the team to clear the scale accumulations until 3,652 ft. The operator confirmed integrity of the tubing at the end of the slickline operation, allowing the slickline team to enter and run a memory pressure temperature survey to check the well deliverability. The implementation of the Torque-Action Debris Breaker tool enabled KJO to reduce inventory and overall descaling time.

Microscopic and Fourier transform infrared (FTIR) analysis of the scale determined it was calcite with some small hydrocarbon impurities from either oil or diesel.

The way forward: create a detailed reservoir characterization

The presence of calcite (CaCO3) as a scaling agent is due to the carbonate-rich saturated formation water and the loss of CO2 from this water to the hydrocarbon phase as pressure decreases.

Creating a detailed reservoir characterization that defines fracture orientation, relative aperture produced fluid analysis, and rock properties can help minimize the effect of scale at an early stage. Continuous well monitoring can lead to early identification of scale and determine the need for chemical treatment or further mechanical intervention. This study demonstrates the benefit of using the Peak Torque-Action Debris Breaker tool as the first method of descaling in cases requiring mechanical intervention.

 

Product Code: 117