Real Results

Performance By The Numbers

Single-Run Success in Indonesia:

DwC™ System Drills Through High‑Risk Formations With Zero Incidents, Saves 4 Days

Objectives

  • Optimize the well design into two sections, allowing the 12 1/4-in. hole to pass through interbedded formations across potential casing points at an MD of 2,100 ft (640 m) and 2,380 ft (725 m).
  • Mitigate the risk of losses, shallow gas, stuck pipe, sloughing shale, and coal cavings.
  • Reduce overall cost by minimizing trip time, eliminating the pilot hole requirement, and lowering exposure to operational risks.
  • Enhance bit durability to avoid early casing setting and still reach the planned TD.
  • Run and set casing to TD in a single run, safely and efficiently.

Our Approach

  • Weatherford deployed a 9 5/8-in. DwC Drilling-with-Casing system equipped with a 12 1/4-in. Defyer® DPA 5519X drillable casing bit to mitigate previously encountered challenges.
  • The 12 1/4-in. x 9 5/8-in. non-retrievable DwC system was successfully run from 95 ft (29 m) MD to 3,000 ft (914 m) MD, drilling a 2,905-ft (885-m) interval using 9 5/8-in. 47 ppf L80 casing in a single run without any safety incidents or nonproductive time (NPT).
  • The BHA configuration consisted of the DPA bit, first float collar, pup joint, second float collar, and casing joints up to surface.
  • The system enabled immediate cementing upon reaching TD, successfully pumping cement through the cementing swivel without issues.
  • An 8 1/2-in. PDC bit with motor BHA for the next section was used to drill out the 12 1/4-in. DPA 5519X bit in only 6 minutes using low parameters, allowing the operator to continue drilling the next hole section with the same bit.

Value to Customer

  • The DwC technology enabled the operator to drill and cement the 9 5/8-in. casing string beyond the target depth (620 ft (188 m) deeper than planned) in a single trip, eliminating multiple potential well issues.
  • Successfully managed drilling operations in a high shallow-gas environment, eliminating the need for a pilot hole while maintaining safe and controlled conditions throughout the run.
  • The DwC system completed the section in 63 hours, finishing one day ahead of plan and saving 4 days compared to conventional drilling.
  • The well set a record as the deepest onshore 9 5/8-in. drilling-with-casing operation in Indonesia.

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Details

Location

East Kalimantan, Indonesia

Well Type

Onshore, vertical

Formation

Shale, coal, sandstone, limestone, and Calcareous

Hole Size

12-1/4 in.

Casing Size and Type

9-5/8 in., 47 ppf, L-80 with BTC connection

Pressure

400 to 1,400 psi (2.7 to 9.6 MPa)

Measured Depth

In: 95 ft (29 m)
Out : 3,000 ft (914 m)
Interval: 2,905 ft (885 m)

Products/Services

DwC™ System Drills Through High‑Risk Formations

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