Advancing downhole conveyance

Oilfield Review

Volumn 16, Issue 3, 2004, Pages 30-43

  Alden, Mark ^a   Arif, Faisal ^a   Billingham, Matt ^a   Grønnerød, Njål ^b   Harvey, Samuel ^a   Richards, Matthew E ^c   West, Cris ^c  

^a Hydro ^*

^b STATOIL   (Norway)

^c CHEVRON ENERGY TECHNOLOGY COMPANY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

COILED TUBING (CT); EXPLORATION AND PRODUCTION (CO); UNIVERSAL TUBING LENGTH MONITOR (UTLM); WELLBORES;

CABLES; FRACTURING (OIL WELLS); FRACTURING FLUIDS; FRICTION; OIL FIELDS; OIL WELL DRILLING; OIL WELLS; PARAMETER ESTIMATION; PETROLEUM PIPELINES; PLASTIC DEFORMATION; PRESSURE EFFECTS; STRENGTH OF MATERIALS; WELL LOGGING;

EXPLORATORY BOREHOLES;

EID: 10044242780     PISSN: 09231730     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Review

References (7)

1. Shepard SF, Reiley RH and Warren TM: "Casing Drilling: An Emerging Technology," SPE Drilling and Completion 17, no. 1 (March 2002):4-14.
2. Afghoul AC, Amaravadi S, Boumali A, Calmeto JCN, Lima J, Lovell J, Tinkham S, Zemlak K and Staal T: "Coiled Tubing: The Next Generation," Oilfield Review 16, no. 1 (Spring 2004): 38-57.
3. Afghoul et al, reference 2.
4. Adnan S and Cher YC: "An Improved Prediction of Coiled-Tubing Lockup Length," paper SPE 89517, presented at the SPE/ICoTA Coiled Tubing Conference and Exhibition, Houston, March 23-24, 2004.
5. Note that the weakpoint does not require the same 18,000-lbf rating as the cable, since the weakpoint is downhole while the cable has to support the higher tension at the surface.
6. A keyseat is a narrow channel that a cable or drillpipe rubs into an openhole borehole wall as it moves up and down. This can be the result of a sharp change in direction of the wellbore - a dogleg. This may also occur if a hard formation ledge is left between softer formations that enlarge over time. When the cable or pipe is pulled to the surface, it passes through the slot, but a tool or bit with larger diameter may stick at that point.
7. Drift is the maximum diameter of a tool that can fit inside a wellbore. A drift run pulls or pushes a cylinder of known outside diameter through the wellbore to assure that tools of that diameter can pass through the wellbore.