Proven Results, Outstanding Reliability.
Redback’s Roller Reamer delivers outstanding results every time. The roller reamer features a patented wedge lock cutter retention system which provides performance reliability and dependability that businesses rely on.
Redback Roller Reamer Features
Featuring a pressure equalised lubricated bearing system, the cutters ensure effective operation in high pressure, down hole environments. The cutters’ seals prevent mud and cuttings from entering the bearings while retaining lubricant within the bearing faces meaning additional attainable revolutions.
The low torque point of stabilisation allows the Roller Reamer cutters to roll around the hole, reducing stick slip and vibrations. By reducing vibrations, the Redback Roller Reamers increases the mean time between failures (MTBF) of other BHA components.
Unlike fixed blade stabilisers, the Roller Reamer causes less hole wall damage. The stepped profile only opens the hole to the Reamer’s dressed diameter and removes ledges and mini doglegs from the borehole. The smoother wall profile significantly aids the drilling, logging, coring, and casing running processes. The combined features of the Roller Reamer reduce risk throughout the drilling process.
Improved bit weight transfer assists drillingBy improving the bit weight transfer, together with torque reduction and stick slip increases the constant energy available at the bit - the weight ratio factor. Removing the peaks from the constant energy adds life to tri cone bit bearings and reduces PDC cutter/TCI tooth breakage. As Stick slip release can result in high string RPM, reducing the spikes decreases incidents of cutter face damage and drill bit reverse rotation.
Reduce trip times through tight sections and ledge removalBy removing tight sections and ledges in the reamed hole, the trip times in and out of the hole are significantly reduced. Patented bi-directional and back reaming cutters facilitate the reaming through tight spots when tripping out of the hole. Typically, this can be done only where rigs are equipped with top drive equipment. Improved borehole profile also reduces the frequency of stuck pipe incidents and thereby fishing operations.
Simple access through ledge removalThe removal of ledges assists wire line logging tools and casing/liner down hole, significantly reducing running times and instances of getting stuck. With LWD tools, stick slip vibration reduction allows noise reduction and improved MTBF.
Reduction of stick slipTorque can be detrimental to quality core collection. The reduction of stick slip allows more constant barrel rotation and reduced vibrations increasing coring performance.
Optimised cutting actionThe hard formation cutter profile optimises the cutting action for the opening of under gauge hole and the removal of stringers and ledges typically created by direction change in the borehole.
Roller stabilisationThe stabilisers allow longer reamers with full gauge hole wall contact. Under gauge rollers to simulate fixed blade stabiliser dimensions are also available. A maintenance manual is included with each set of cutters. This manual gives full details on changing the cutter cartridges.
- Redback roller reamers have proven over many years to provide the highest levels of reliability and performance to aid the drilling operation and reduce hole issues. One of the main areas where the most benefit can be gained is when the Redback directly replaces fixed blade stabilisers
Redback Roller Reamers act like a bearing between the BHA and borehole leading to significant reduction of drilling torque and down hole vibrations.
- Running the roller reamer will eliminate hanging up, weight transfer and torque/vibration issues that can be caused with running stabilizers
The patented retention system employed in the Redback roller reamer provides superb reliability when compared to other roller reamer designs
Multiple reaming options to address various applications
- No limit to the application of the roller reamer in varying well profiles i.e. Vertical, directional and/or horizontal sections
- Yes, historically the use of the roller reamers was to just run it in a clean out or wiper trip assembly after the section had been drilled.
- To gain the most benefit out of running a roller reamer, this should be run as part of the drilling assembly which will aid the drilling performance while ensuring the hole is kept in good condition and provide an easier trip out of hole.
- Drilling assemblies including a roller reamer significantly reduces the likelihood of requiring a further clean out/wiper trip. Reaming the hole while drilling will make it easier to run the casing first time and without having the cost of an additional run
- The placement options are not limited when looking to run the roller reamer. It can either be replacing a specific stabilised point in the assembly or even running a complete assembly with only roller reamers instead of stabilisers.
We have a very experienced team who can assist and provide you with the required information on where best to position the roller reamers to optimise the performance.
- Placement can be higher up in the assembly with standard steel body tools and further flexibility is provided through the option of running Non-Mag roller reamer bodies that can be placed lower down into the assembly
- Specialised designs that allow for real-time communication through the bodies are available. These are specific to the Directional Drilling companies
- Yes, the Redback roller reamers have regularly been run with down hole tools that target the reduction of stick-slip vibration. The added benefit of the roller reamer is that it provides 3 Points of stabilization, reduces torque and subsequent vibration while also being able to condition the hole and ream any ledges, transition areas and possible under gauge hole
- No there is no upper limit on the RPM that can be run but the higher the RPM being run the quicker you will accumulate the revolutions on the bearings.
- The life of the Redback Roller Reamer should be discussed before the application to optimise the performance and time in hole
- This is a question that still gets asked on a regular basis as the roller reamer has moving parts and historically the perception is that roller reamers will lose cutters down hole.
- The design criteria on the Redback roller reamer was to provide a retention system that securely hold the cutter cartridge in place even when run in harsh environments and for extended periods of time without fear of a failure occurring.
- The wedge lock retention system has been proven in applications around the world to provide the highest level of durability/Reliability.
- This has gained the Redback roller reamer the reputation as the market leading roller reamer brand and preferred option for many Operators and DD companies.
- The Redback can be run up to 200°C (392°F)
Options are available for GeoThermal and HP/HT applications