Switchblade®

The Switchblade design addresses the known issues of the conventional blade stabilizer with its enhanced hydrodynamic profile and versatility. The system is ideal for a field development or remote operating location as the blades are rig site replaceable to reduce unnecessary inventory and transportation costs. The outer diameter of the blades can be adjusted on surface to cover a 1” range (see technical description) this flexibility enables the onsite engineer to configure / fine-tune the BHA to cover a wide range of drilling applications.

Unique Tool Profile

The tool profile and blade orientation improves BHA and drillstring stabilization by reducing torque, drag and torsional vibration – all key causes of borehole enlargement and subsequent BHA component failure.

The enhanced hole cleaning ability limits pack off tendency, aides ECD management and minimises borehole erosion when tripping and backreaming.

Better drill fluid displacement reduces the risk of swabbing and surging in comparison to conventional blade stabilisers when tripping – a key cause of wellbore instability.

Switchblade overview

Blades

The six or eight blade orientation and smooth dome profile have three key benefits:

I.  Improved weight transfer when slide drilling minimises hanging up, motor      stalls and subsequent loss of tool face as well as the onset of excessive              stick/slip in rotary mode.

II. The balanced front and back wellbore contact points improves stabilisation      by reducing friction and dampening drillstring harmonics.

III. The hydrodynamic design enhances hole cleaning performance whilst               optimizing vibration mitigtion at source.

Taper System

The blades are independently configurable allowing the creation of a unique front or back tapered profile. This can be applied to the top string stabiliser to reduce the risk of hanging up when POOH through cutting bed accumulations and or interbedded formations.

Conversely, the tool can be installed above a motor to create a positive taper effect in wells with high dogleg angles to provide excellent weight transfer when sliding.

Operational flexibility
The gauge is surface adjustable by 1″ in 1/8″ increments, using a combination of shims and high or low blades, eliminating the need for additional undergauge stabilizers inventory on location.

This flexibility allows worn or damaged blades to be quickly and efficiently changed on location instead of sent back to the workshop for repair.

North Sea region

CHALLENGES

balling up / packing off
lost circulation

SOLUTION

– Include the Switchblade stabilizers in the
  rotary BHA

RESULTS

no motor stalls or hanging up
good TF control
excellent weight transfer

Switchblade technical description

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