Sidetracking technology for coiled-tubing drilling

Journal Article · Wed May 01 00:00:00 EDT 1996 · JPT, Journal of Petroleum Technology

DOI:https://doi.org/10.2118/30486-JPT· OSTI ID:242240

Leising, L J; Doremus, D M ^[1]; Hearn, D D ^[2]; Rike, E A ^[3]; Paslay, P R ^[4]

---

1. Schlumberger Dowell, Sugar Land, TX (United States)
2. Arco Alaska Inc., Anchorage, AK (United States)
3. Schlumberger Dowell, Anchorage, AK (United States)
4. Techaid Corp., Houston, TX (United States)

Coiled-tubing (CT) drilling is a rapidly growing new technology that has been used for shallow new wells and re-entry applications. Through-tubing drilling has evolved as a major application for CT drilling. The remaining key enabling technology for viable through-tubing drilling is the ability to sidetrack in casing below the tubing tail. This paper describes the three technologies developed for sidetracking and presents a mathematical model of forces, penetration rates, and torques for window milling with the cement-sidetracking (CS) technique. Window milling has been a seat of the pants operation in the past. To the authors` knowledge, this is the first published work on the mechanics of window milling. The results from several yard tests and one field test are presented and show some of the problems associated with sidetracking.

• Sponsoring Organization: USDOE
• OSTI ID: 242240
• Journal Information: JPT, Journal of Petroleum Technology, Vol. 48, Issue 5; Other Information: PBD: May 1996
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
OIL WELLS
WELL SERVICING
NATURAL GAS WELLS
TOOLS
TECHNOLOGY ASSESSMENT
DIRECTIONAL DRILLING