WWT NRP

Riser Protection | Torque Reduction | Casing Wear Protection | Drag Reduction

Gulf of Mexico

Job No.: 3182
Water Depth: 300+ ft.
Well Depth: 13,000+ ft.
Problem: Operator drilling “S-shaped” directional well; drilling stopped due to excessive top-drive torque and drag relating to increased slack-off weight and pick-up weight.
Solution: Installed WWT Non-Rotating Protectors (WWT Super Sliders) in the critical, high side force area of the well bore. Operator finished hole section, successfully reaching TD while experiencing torque reduction of more than 25% and drag reduction of more than 10%. 

Rocky Mountains

Job No.: Numerous wells
Well Depths: 6,000 to 7,000 ft.
Problem: Operator was having difficulty reaching planned TD while drilling directional wells from a pad in the Rocky Mountains because torque was exceeding rig capabilities.

Kazakhstan
Job No.: 2449
Well Depth: 4,800 meters
Problem: Operator experienced excessive torque when drilling the 12-1/4” hole section.
Solution: Installed WWT NRPs which immediately reduced torque to manageable levels. See chart below for details.
Torque 12 1/4" Section (PDF file/ 311Kb)

North Sea
Job No.: 2256
Well Depth: 4,600 meters
Problem: Experienced high torque when drilling the original well. The concern was that high torque would continue when drilling the side track.
Solution: WWT NRPs were installed at 4,370 meters into the original well and throughout the drilling of the sidetrack. See chart below for actual torque recordings.
Torque Comparison with and without WWT Protectors PDF file/149Kb)

Qatar
Job No.: 2316
Well Depth: 15,252 ft. (4,648 m) MD              
Problem: Reduce drill string torque when drilling the 8.5" hole section.
Solution: Installed 204 WWT Model SS-550 NRPs in the 8.5" hole section from 10,754 ft. There was an immediate torque reduction of 19.75% over the entire section. As the well progressed, the torque reduction increased to 43.4%. Additional benefits included an 87% reduction in metal recovery and a significant reduction in drag.
Torque Reduction Case -Qatar 2004 (PDF file/574Kb)

Russia
Job No.: 2108
Well Depth: 13,123 ft. (4,000 m) MD
                       9,514 ft. (2,900 m) TVD
Problem: Reduce drill pipe torque when drilling the 8.5" hole section for coring operations.
Solution: Installed 150 WWT Model SS-500 NRPs. Torque dropped 20% to 24,000 ft.-lbs.

United States
Job No.: 2260
Well Depth: 16,500 ft. (5,029 m) MD              
                    16,000 ft. (4,876 m) TVD
Problem: Reduce torque for milling operations.
Solution: Installed 150 WWT Model S-350 NRPs. Torque dropped 40%.

Gulf of Mexico, U.S.A.
Job No.: 1001
Well Depth: 28,800 ft. (8,778 m) MD
Problem: High torque while drilling the 8-1/2" hole section.
Solution: Installed WWT NRP in the build and tangent section of the well. Reduced torque 22%. No further casing wear reported during the 97 more days of drilling. WWT Non-Rotating Protectors reduced drillpipe torque, decreased drill string drag, and protected the casing from wear.

Gulf of Mexico, U.S.A.
Job No.: 743
Well Depth: 23,300 ft. (7,101 m) MD
Problem: Torque and casing wear in this directional well.
Solution: Installed WWT NRP in the build section of the well. Reduced torque 20%. No more casing wear occurred in 72 more days of drilling.

Gulf of Mexico, U.S.A.
Job No.: 792
Well Depth: 13,350 ft. (4,069 m) MD
Problem: High torque and casing wear in this S-profile well.
Solution: Installed WWT NRP in the build and drop section of the well. Reduced torque 30% and eliminated any additional casing wear.

Gulf of Mexico, U.S.A.
Job No.: 561
Well Depth: 27,900 ft. (8,604 m) MD
Problem: Torque and casing wear in this directional well.
Solution: Installed WWT NRP in the build and tangent section of the well. Reduced torque 20%. No more casing wear occurred in 84 more days of drilling.

West Coast, U.S.A.
Job No.: 2089
Well Depth: 17,200 ft. (5,242 m) MD
Problem: Torque and casing wear in this ERD well.
Solution: Installed WWT NRP in the build and tangent section of the well. Reduced torque 20% and eliminated additional casing wear during the remaining 18 days of drilling.

(Back to the top)

Casing Wear Protection

West Texas

Job No.: 3072
Well Depth: 20,000 ft.
Problem: Operator drilling a 20,000-ft. re-entry sidetrack through previously worn casing was concerned with casing wear in the re-entered casing, rotary torque and drag.  
Solution: Installed WWT Non-Rotating Drill Pipe Casing Protectors (NRP). The well was drilled without additional casing wear and significantly under rig torque limitations. Company man’s comments; “Equipment and personnel performed above expectations. No casing wear shown on exit log. Torque reduction exceptional.”

Freestone County, Texas

Job No.: 3091
Well Depth: 14,000+ ft.
Problem: Operator experiencing excessive metal recovery and rotational hours while drilling directional well in hard formation was concerned with casing wear and rotary torque.
Solution: Installed WWT Non-Rotating Protectors in casing interval with the highest side force; the metal recovered was minimal and torque was reduced by more than 20%. Operator continued use of WWT Protectors on next well for casing wear and torque control.

Argentina
Job No.: 2127
Well Depth: 9,842 ft. (3,000 m) MD
Problem: Casing wear when drilling the 8-1/2" hole section of a J-profile well.
Solution: Installed WWT NRP in the 9-5/8" casing. During 28 more days of drilling no further casing wear occurred.

Brazil
Job No.: 2142
Well Depth: 19,028 ft. (5,800 m) MD
Problem: Casing wear at the mud line during directional drilling.
Solution: Installed WWT NRP in the riser and into the upper wellbore. There was a significant reduction in casing wear.

Canada
Job No.: 2181
Well Depth: 17,060 ft. (5,200 m) MD
                    13,779 ft. (4,200 m) TVD
Problem: 2 mm casing wear in 9.63" casing
Solution: Installed 160 WWT S-500 NRPs. Casing wear log showed no additional casing wear in the section where the Protectors were installed after an additional 29 days of drilling.

China
Job No.: 2220
Well Depth: 14,763 ft. (4,500 m) MD
Problem: Casing wear while drilling this J-profile well.
Solution: Installed WWT NRP in the build section of the well. Casing wear was eliminated.

Gulf of Mexico, U.S.A.
Job No.: 2161
Well Depth: 29,000 ft. (8,839 m) MD
                    29,000 ft. (8,839 m) TVD
                    6,000+ ft. (1,828+ m) Water Depth
Problem: Control casing wear and reduce torque when drilling 12.5" hole section.
Solution: Installed 600 WWT Model S-658 NRPs. Casing wear was minimized through more than 30 days of drilling.

Gulf of Mexico, U.S.A.
Job No.: 2083
Well Depth: 13,550 ft. (4,130 m) MD
Problem: Control casing wear and torque during directional drilling
Solution: Installed WWT NRP in the build and tangent section. Casing wear was eliminated and there was a 10% reduction in rotary torque.

Gulf of Mexico, U.S.A.
Job No.: 2085
Well Depth: 12,400 ft. (3,769 m) MD
Problem: Casing wear while directional drilling
Solution: Installed WWT NRP in the build section. No more casing wear during 24 days of drilling.

Gulf of Mexico, U.S.A.
Job No.: 1028
Well Depth: 26,800 ft. (8,168 m) MD
Problem: Casing wear in this S-profile well.
Solution: Installed WWT NRP in the build and tangent section. Drilled for 104 more days with no casing wear reported.

Gulf of Mexico, U.S.A.
Job No.: 715
Well Depth: NA
Problem: Drilling riser and production riser wear
Solution: Installed WWT NRP in the riser section. No further wear or damage occurred to the riser during 109 more days of drilling.

Gulf of Mexico, U.S.A.
Job No.: 712
Well Depth: 30,000 ft. (9,144 m) MD
Problem: Casing wear during direction drilling.
Solution: Installed WWT NRP in the build and tangent section of the well. During 214 more days of drilling, there was no more casing wear.

Gulf of Mexico, U.S.A.
Job No.: 513
Well Depth: 14,300 ft. (4,358 m) MD
Problem: Riser and casing wear during directional drilling.
Solution: Installed WWT NRP in the riser and build section. Riser and casing wear was eliminated.

Gulf of Mexico, U.S.A.
Job No.: 387
Well Depth: 23,700 ft. (7,223 m) MD
Problem: Riser and casing wear.
Solution: Installed WWT NRP in the riser and build sections of this vertical well. No more riser or casing wear occurred during 40 more days of drilling.

Texas, U.S.A.
Job No.: 560
Well Depth: 16,500 ft. (5,029 m) MD
Problem: Casing wear.
Solution: Installed WWT NRP in the build section. During 40 more days of drilling, no further casing wear occurred.

(Back to the top)

Drag Reduction

United States
Job No.: 555
Well Depth: 20,000 ft. (6,096 m) MD
                    11,500 ft. (3,505 m) TVD
Problem: Reduce drag to allow greater weight on bit.
Solution: Installed 260 WWT Model SS-550 NRPs. Drilled well successfully. Slack off weight measurements were taken when POOH. Protectors removed and slack-off weight again measured without Protectors as a direct comparison. WWT Model SS-550 NRPs reduced drag by 17%.

(Back to the top)

Please contact WWT for more information.