دات نت نیوک
Turbodrilling

In order to improve drilling efficiency, by extending the life of drilling tools, and to provide a quantum leap in overall drilling performance in certain targeted applications, Top Select has established a service system for the whole drilling process from design to execution through the provision of a high technology turbo-drilling service. When applied in the correct application turbo-drilling can generally save drilling time by 40%-50% and overall drilling cost by 1/3. This technology causes the hole quality to be improved greatly which reduces the well bore tortuosity while drilling. Moreover, it can facilitate easier running of casing or production liner strings. Turbo-drilling is particularly well suited

to deep wells, heavy mud weight scenarios, high down hole temperatures as well as it is highly applicable in the formations with poor drillability by conventional approaches. Taking into account different formations and well conditions, Top Select can provide various combinations of diamond-impregnated bits and turbodrills of various configurations, which have been successfully used to drill directional wells, horizontal wells and highly deviated wells.

Technical Advantages

Compared with the conventional rotary drilling method,

  •  Turbodrills can double the average ROP, and greatly extend the number of meters drilled in a single run.
  •  By saving on the trip time, turbo-drilling has been proven to shorten the overall time to drill a hole section by 55% thereby lowering the overall drilling cost by 30%
  •  Turbo-drilling technology has been proven to be a highly effective method to improve drilling performance in gravel layers, igneous rock and high abrasive quartz sandstones
Examples of the advantages and efficiency improvement through turbo-drilling compared to conventional rotary drilling
Lithology ROP Life of bit Dull characteristics
of bit
 
Advantages
Sandstone,
mudstone
(shale)
Increased by about 100% About 20 times longer Even and slight wear Distinct ROP improvement, long life of bit, 50% time saved
Quartz sandstone Increased by about 80% About 8-10 times longer Even wear

ROP and run length improved 50% time saved

Igneous rock Increased by about 300% About 20 times longer Slight wear with long life

Distinct ROP improvement and long life of bit, 60% time saved

Gravel layer Increased by about 30% About 20-30 times longer Slight wear with long life

Slight improvement of ROP, distinct improvement in run length, 65% time saved

Provision of turbodrills and both PDC and diamond impregnated bits of different sizes and specifications applicable to 3-1/4”~17-1/2” boreholes
Field Application
Bit comparison in Quartz sandstone interval
Drilling method Bit Interval Footage (m) Bit Hour (h) ROP (m/h) Field Grading
Conventional Drilling 12 1/4”HF537K 4251.11-4278.54 27.43 42.5 0.65 8-7
Turbo Drilling 12 1/4”K705 (re-run) 4278.54-4429.68 151.14 (Total 680.17m) 112.83 (Total 396.73h) 1.34 3-3
Increase 5.51(24.80) 2.65 (9.33) 2.06      
Bit comparison in Igneous rock interval
Drilling method Bit Interval Footage (m) Bit Hour (h) ROP (m/h) Field Grading
Conventional Drilling 8 1/2” HJ517G 4537.96-4578.19 40.23 42.65 0.94 8-8
Turbo Drilling 8 1/2”K507 4578.19-4876.01 297.82 102.04 2.92 1-1
Increase 7.40 2.39 3.11  
Bit comparison in Gravel stone interval
Drilling method Bit Interval Footage (m) Bit Hour (h) ROP (m/h) Field Grading
Conventional Drilling 12 1/4”EP6903 4338.9-4344.53 5.63 10.57 0.53 8-8
Turbo Drilling 12 1/4”K507 4344.53-4698.90 354.37 348.0 1.02 6-4
Increase 62.94 32.92 1.92