A Robust Torque and Drag Analysis Approach for Well Planning and Drillstring Design

Adewuya, Opeyemi; Pham, Son

doi:10.2118/39321-ms

Cited by 16 publications

(4 citation statements)

References 6 publications

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“…(1) One-End Hinge (2) Two-End Hinge. The test results, plotted in figure(2), were verifying the relationship between the displacements and axial forces obtained from tests and FE Model. A beam element that makes a contact with analytical rigid models, the model results shown in Figure (2) is242Applied Mechanics and Materials III quite acceptable for predicting Buckling.…”

supporting

confidence: 66%

“…Drag and torque problems are connected with directional wells (directional and horizontal wells) [11]. Torque and Drag analysis remains an important evaluation process for assessing drilling feasibility of directional wells, because it helps in: ○ 1 minimizing the occurrence of tragic drill string failures and ○ 2 avoiding the early ending of the drilling operation before reaching target [2]. The high demands of oil dedicate to drill deep and more complex well also to drill extended reach wells.…”

Section: Introductionmentioning

confidence: 99%

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FE Simulation of Torque and Drag inside Borehole of Oil and Gas Wells (Part II)

Bagadi

Gao

Fadol

2015

AMM

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The wellbore friction, torque and drag, between drill string and the wellbore wall is the most important issue which limits the drilling industry to go beyond a certain measured depth.The calculation and analysis of torque and drag were considered to be very important in drilling and well design. A variety of models (soft, stiffness, mixed and finite element) have been used to determine the torque and drag. A FEA (Finite Element Analysis) model of the drill string to simulate it’s working behavior, involving contacts between the drillstring and borehole wall was developed, this FE Model was to be compared with computational model of torque and drag, and to be verified with experimental results.The drillstring displacements calculated by the FEA model matches those from commercial software in petroleum industry (Landmark). The model developed and discussed in this paper can be used for predicting torque and drag inside wellbores of oil and gas wells, and it will also benefit in preplanning simulation of oil and gas well drilling operations.

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supporting

confidence: 66%

Section: Introductionmentioning

confidence: 99%

FE Simulation of Torque and Drag inside Borehole of Oil and Gas Wells (Part II)

Bagadi

Gao

Fadol

2015

AMM

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“…Since its introduction more than ten years ago, torque and drag predictive software has gained wide acceptance for routine well trajectory design and post-event analysis [1,2]. There are a variety of sources of excessive drag and torque [3]:…”

Section: Torque and Dragmentioning

confidence: 99%

Field Data Supports the Use of Stiffness and Tortuosity in Solving Complex Well Design Problems

et al. 1999

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractTorque and drag analysis has been used for more than ten years to drill wells 'on paper'. Representations of the drillstring and bottomhole assembly (BHA) that do not include the individual component stiffness have been used with some success in analyzing and preventing problems in extended reach drilling. As curve rates have increased in directional wells and the trajectories themselves become more complex, the effects of the previously neglected stiffness have led to errors in the sideforce calculations that underpin all torque and drag analysis. Finite-element analysis can solve this problem. Additionally, tortuosity can be added to provide a rippled effect to a well trajectory design that simulates the micro dog-legs that occur in the drilled well, enabling more realistic bounds to be placed on the drag and torque losses, and the forces experienced by the drillstring. Tortuosity also allows more accurate modeling of the side forces between the casing and drillpipe, critical to extended reach well design. This is illustrated using a well with a deep kick-off point from the Gulf of Mexico.A case study based on wells drilled from the Hibernia platform is used to illustrate how the model has been utilized to aid planning decisions and reduce costs.

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“…There are six calculation methods which have been widely used in directional drilling application; tangential, Mercury, average angle, balance tangential, minimum curvature and radius curvature method. Minimum curvature method is often use in order to maximize survey calculation accurately [11].…”

Section: Well Trajectory Calculationmentioning

confidence: 99%

Investigation of Well Plan Parameters for Directional Drilling in Gulf of Thailand

Hentoog

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Directional drilling is commonly practiced in complex structure reservoir in Gulf of Thailand. Directional well path is planned by different well planner experiences. Torque and drag analysis are performed to examine drillability of well path. This process may take time and effort. This study provides optimum sets of well plan parameters i.e. kick off point (KOP), inclination (INC), build rate (BUR) based on torque and drag as criterion, to improve well planning process. This study is based on 4 well profiles; 2 dimensional (2D) build and hold, 2D build hold and drop, 3D build and hold and 3D build hold and drop. Each well profile requires different well plan parameters. To allow efficiency of well plan parameters varying process, a set of fundamental well construction and reservoir data are assumed. Constrain values are based on Gulf of Thailand field data. Derivative torque and drag from each well profile are observed, analyzed and evaluated. The effect of mud weight also investigates in this study. The study found that KOP and INC are the most important well plan parameters on torque and drag generated in deviated wells. Other well plan parameters show minor effect. 2 deg./100ft. BUR generates significantly low torque and drag in build section. However, there is a limit to apply. Varied mud weight afftects torque and drag as increase 1 pound per gallon of mud weight yields lower torque and drag as 1.5 percent approximatly. The parameters set and limit of well plan parameters for each well profiles are presented in this paper.

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A Robust Torque and Drag Analysis Approach for Well Planning and Drillstring Design

Cited by 16 publications

References 6 publications

FE Simulation of Torque and Drag inside Borehole of Oil and Gas Wells (Part II)

FE Simulation of Torque and Drag inside Borehole of Oil and Gas Wells (Part II)

Field Data Supports the Use of Stiffness and Tortuosity in Solving Complex Well Design Problems

Investigation of Well Plan Parameters for Directional Drilling in Gulf of Thailand

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