Drill String Torque Reducer

The DSTR is a down-hole drill string tool intended for use in deviated wells where excessive rotary torque causes drilling problems.

The DSTR is an integral drill string component consisting of a short mandrel fitted with a bearing supported, non-rotating sleeve. The DSTR is positioned between the connections of the drill pipe at the well radius section of the hole.

Achieving an international award for innovation at the Houston oil show in 1996, the tool is now acknowledged as the industry standard. With a minimum of 40 tools installed in the drill-string, the tool can reduce drilling torque by as much as 40% under extremely high side forces; saving fatigue on the pipe and rig power.

Another benefit seen with the tool is the reduction of casing wear. For a given deviation profile, the applications program assists in maximising the tools performance by determining the deployment in the critical sections of the borehole. However, for most ERD applications the tools are used in the build sections of the borehole helping to extend the envelope of rotary drilling.

Tool Features

• One piece mandrel with mechanical properties exceeding the specification of the drill pipe
• The sub assembles within a standard drilling stand and average derrick height
• Dual sleeve retention mechanism for down hole reliability
• Tool design to offer reliability and integrity under severe down hole conditions
• Reduced power requirements for string rotation in deviated wells.
• Reduced wear on surface rotating equipment.
• Reduced drill string wear and fatigue.
• Extended application of rotary drilling practice in high step out wells.
• Lower drilling costs
• Minimised casing wear

Downloads

DSTR conoco.xls

Excel Spreadsheet - 27 KB

DSTR_animation.zip

ZIP Archive - 9.4 MB

DSTR DATA.xls

Excel Spreadsheet - 86 KB

DSTR_Performance_Agip_Congo_Report.pdf

PDF Document - 501 KB

DSTR_BP_Miller_Run_Report.pdf

PDF Document - 92 KB

DSTR _08_Brochure.ppt

Powerpoint Presentation - 3.8 MB

DSTR_Shearwater_Well_Report.pdf

PDF Document - 543 KB

DSTR_video.avi

AVI Movie - 15.4 MB