TrackMaster OH Openhole whipstock sidetracking system

TrackMaster OHOpenhole whipstock sidetracking system

Applications ■ Openhole sidetracking in medium-to-hard formations and formations with unconfined

compressive strengths of up to 40,000 psi [275.8 MPa] ■ Accurately controlling kickoff depth and direction ■ Landing laterals with tight TVD tolerances

Benefits ■ Maximizes the chance of achieving a successful sidetrack on the first attempt ■ Increases reservoir recovery with optimized horizontal lateral ■ Improves drilling efficiency by providing accurate control for precise kickoff depth

and direction ■ Saves rig time by reducing interval drilling time and by eliminating the need to wait for

cement to cure

Features ■ Ramp that lowers bending stresses ■ Elimination of packers for faster run-in speed ■ Hydraulically set expandable anchor with triaxial steel slips that span multiple hole sizes

and accurately set whipstock depth

Sidetrack the uncertainty of cement plugs. Drill ahead in one trip.Traditional openhole sidetracking starts with a trip to set a cement plug, followed by non-productive time waiting for the cement to cure, and then tripping back in with a drill bit to dress off the plug at the kickoff point. This process can take up to 24 hours before the actual sidetracking operation begins.

Take control of kickoff depth and orientationThe TrackMaster OH* openhole whipstock sidetracking system eliminates the time-consuming inefficiencies of traditional tools and methods. Engineered with a steel ramp and hydraulically expandable anchor, the system enables running, orienting, anchor setting, cementing, and stinger recovery to drill ahead in one trip.

Match the technology with the application using prejob analysesFor planned or unplanned event sidetracking where lower-zone isolation is not required, the TrackMaster OH system uses sophisticated dynamic modeling to match specific wellbore departure objectives, constraints, and physical characteristics.

The i-DRILL* engineered drilling system design uses predictive modeling to identify applica-tion-specific solutions that minimize vibrations and stick/slip and optimize milling assembly performance. Predictive modeling minimizes rathole and directional drilling vibrations. The i-DRILL design process quantifies vibrations and milling ROP, and each component of the assembly and drillstring is simulated and analyzed to optimize mill and whipstock design and configuration. Using offset data, surface and downhole measurements, and a thorough knowledge of products and applications, the i-DRILL design process creates a virtual milling and drilling environment.

In the execution phase, the Runner* drillstring analysis program provides a complete side-tracking model to help analyze surface parameters, torque and drag, setting operations for anchors and shear bolt activation, and contact forces and buckle states of the working string in the departure operation. Once the actual operation has begun, the Runner program provides a real-time analysis of the modeled parameters as compared with the actual parameters.

TrackMaster OH Openhole whipstock sidetracking system

Steel ramp.

Triaxial expandable anchor.

CASE STUDY

Sidetracking in mature, complex field enables directional drilling assemblies to reach planned target An operator drilling in Keathley Canyon offshore Louisiana, USA, used TrackMaster OH system to drill a clean 8 ½-in sidetrack, allowing subsequent directional drilling assemblies to regain the lost hole by drilling ahead to the planned target. The operation set a new world record for the deepest openhole whipstock at 31,513 ft.

Using modeling software and automated BHA profile programs to predict the departure path ensured that the drilling assembly could drill past the whipstock to build the required separation from the original borehole. An angle-building drilling assembly was used to drill across the whipstock and establish the rathole.

Deepest openhole whipstock record set in deepwater Gulf of Mexico at 31,513 ft

Designed to deliver single-trip sidetracking, the TrackMaster OH system eliminates the uncertainty of conventional cement plugs and maximizes the probability of a successful sidetrack on the first attempt.

For planned or unplanned event sidetracking where lower-zone isolation is not required, the TrackMaster OH system can be matched to specific wellbore departure objectives, constraints, and physical characteristics.

Control kickoff depth and orientation

The anchor maintains a firm, three-point grip on the hole wall and is engineered with an internal lock to hold the system in place after setting. With no packer element, the system runs in hole faster and minimizes the risk of damage to the anchor.

Create a clean, smooth transition

The system features a steel ramp that eliminates the uncertainty of kicking off with a cement plug as well as the need for expensive repeat attempts.

There is no waiting time for cement to cure, and the time spent drilling the interval is reduced. The result is a clean, smooth transition delivered faster for optimized directional and horizontal applications.

TrackMaster OHOpenhole whipstock sidetracking system

slb.com/TrackMasterOH

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Read more about Schlumberger openhole sidetracking systems at slb.com/TrackMasterOH

Case studies ■ The TrackMaster OH system set a world

record in deepwater GOM for the deepest openhole whipstock and enabled the directional drilling assembly to reach the planned target.

■ In an ultradeep GOM exploration well, the TrackMaster OH system delivered a clean 8 1/2-in sidetrack and 124-ft rathole in one trip and 31.5 hours.

■ An openhole sidetracking operation in the Colony Wash formation of Oklahoma enabled the operator to drill ahead in one trip, saving 24 hours of rig time.

AnimationWatch an animation that highlights the applications and advantages of the TrackMaster OH system.