Title: Torque and drag field applications in horizontal wells

Authors: Tuna Eren; Burak Kagan Caglayan; Mustafa Verşan Kök

Addresses: Petroleum and Natural Gas Engineering Department, Batman University, Bati Raman Campus, 72100 Batman, Turkey ' PerencoOil Company, Cankaya, 06700 Ankara, Turkey ' Petroleum and Natural Gas Engineering Department, Middle East Technical University, Inonu Blv. 06800 Ankara, Turkey

Abstract: The industry of drilling for oil, gas geothermal, and storage purposes necessitates construction of challenging wells in recent applications. Challenging wells are required to be designed prior to the drilling to selection of the equipment to be utilised while drilling. A poor engineering planning may result in losing time and effort to remediate torque and drag related troubles which might be encountered. Adequate planning is significantly important which is going to reveal possible drawbacks in planned well prior to commencing operations. The drag and torque calculations are required to be estimated and monitored accordingly whilst drilling of the wells. This paper gives the details of torque and drag calculations for every one-metre interval, so that the rig crew can see what is the theoretical calculated magnitudes and compare them to the actual. Implementation of this study is going to identify limitations due to torque and drag allowing safe drilling. [Received: April 6, 2016; Accepted: September 20, 2016]

Keywords: torque; drag; friction between the drillstring and well; directional drilling; horizontal well; drilling engineering.

DOI: 10.1504/IJOGCT.2017.087040

International Journal of Oil, Gas and Coal Technology, 2017 Vol.16 No.3, pp.236 - 249

Available online: 29 Aug 2017

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