Double ROP and Footage with PDM in Southeast Turkey

Çalık Petrol had been struggling with low drilling efficiency, toolface control and bit wear in Southeast Anatolia.

In addition to slow ROPs, there was also need to trip for a new bit at halfway in the 12.25” sections.

View tool

Tool

8 ¼” XC-AST

Client

Çalık Petrol

Country

Turkey

Field

SE Turkey

Well

Well-E

Section

12 ¼”

BHA

12 ¼” PDC, PDM,
Stab, UBHO sub,
NMDC, AST

MUD

WBM

Lots of experience from challenging operations in the deep section of the Northsea led to the development of the XC series AST. The new technology was patented in 2016. Its 10.0 inches of stroke and unique parameter range brought a new level of stability to PDC bits in high-friction environments. The XC-AST is capable of making a good bit 40 to 100% more effective with poor lubricity water-based mud. This big improvement also brings down the risk of round-trips and also technical problems significantly.

Objective

AYA Directional
Drilling Systems

Çalık Petrol decided to run AYA Directional Drilling Systems enhanced with the Tomax 8 ¼’’ XC-AST tool to address some of these issues.

Results

The AST regulator
delivered on all challenges

The new BHA gave almost double ROP and double footage for the bit. This meant the section was drilled to TD in one go.

Value

The improvement with AST is extraordinary in this case

The gain is likely a result of a high coefficients of friction between the rock and the bit. The sections uses water-based mud.

Çalık Petrol
AST Comparison

The significant number of relevant offset wells gave a good basis for comparing the AST performance and value.

4.75” X-series

5” X-series

5.25” X-series

6.75” X-series

7” C-series

8.25” X-series

9.5” X-series