Real-Time Wellbore Friction Analysis to Detect Onset of Drillstring Sticking during Extended Reach Well Drilling: Case Study

Fazaelizadeh, Mohammad; Hareland, Geir; Wu, Andrew; Tahmeen, Mazeda

doi:10.2118/143157-ms

Cited by 7 publications

(4 citation statements)

References 6 publications

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“…The basic assumptions of this model are described as follows 40,41 : (1) The drill string is in elastic deformation. (2) The gap between drill string and wellbore is ignored; the axis of drill string is coincidence with axis of wellbore. (3) The drill string only have axial and circumferential freedom.…”

Section: The Dynamic Drag and Torque Modelmentioning

confidence: 99%

“…An important issue in drilling engineering relates to friction between the drill string and the wellbore. [1][2][3][4] Excess friction is encountered in a long horizontal well that uses sliding drilling modes. 5 Additional drag and torque result in low rates of penetration (ROP), poor tool-face control, and prevent the transfer of weight to the drill bit.…”

Section: Introductionmentioning

confidence: 99%

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Development of torque clutch drilling tool and evaluation of drag reduction performance

Wang

Chen

Huang

et al. 2018

Advances in Mechanical Engineering

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Horizontal well is one of the important methods of unconventional oil and gas resource development. As increasing length of horizontal section, there is a serious problem that axial force cannot transfer to bit. The drilling field needs a low-friction and low-cost drag reduction tool. This article summarized existing technologies of drag reduction in the horizontal and inclined well and proposes an integrated design of torque clutch. Detailed design of tool subsystems is introduced. The tool includes three subsystems: clutch, hydraulic system, and monitoring system. The clutch is consisted of multiple clutch units mounted in a parallel arrangement. Power of hydraulic control system adopts difference in pressure between inside and outside of drill pipes. It can efficiently reduce power consumption. The design function and minimum working pressure are validated and obtained by indoor test. According to theoretical calculation, reasonable distance from tool to bit can be obtained for an actual drilled well. During directional drilling mode, the tool can reduce more than 30% axial drag of drill string according to theoretical calculation. The tool can effectively improve the capacity of transfer weight to bit and overcome the excessive drag in horizontal drilling. No similar tools are reported in the current field.

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Section: The Dynamic Drag and Torque Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of torque clutch drilling tool and evaluation of drag reduction performance

Wang

Chen

Huang

et al. 2018

Advances in Mechanical Engineering

View full text Add to dashboard Cite

show abstract

“…The wellbore friction models (4,5,6) were developed by considering an element of the drill string in the wellbore filled with drilling fluid. The forces considered on the drill string element are buoyed weight, axial tension, friction force and normal force perpendicular to the contact surface of the wellbore as shown in Fig.…”

Section: Wellbore Friction Modelmentioning

confidence: 99%

Real-Time Software to Estimate Friction Coefficient and Downhole Weight on Bit During Drilling of Horizontal Wells

Tahmeen

Hareland

Aadnøy

2014

Volume 5: Materials Technology; Petroleum Technology

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The increasing complexity and higher drilling cost of horizontal wells demand extensive research on software development for the analysis of drilling data in real-time. In extended reach drilling, the downhole weight on bit (WOB) differs from the surface seen WOB (obtained from on an off bottom hookload difference reading) due to the friction caused by drill string movement and rotation in the wellbore. The torque and drag analysis module of a user-friendly real-time software, Intelligent Drilling Advisory system (IDAs) can estimate friction coefficient and the effective downhole WOB while drilling. IDAs uses a 3-dimensional wellbore friction model for the analysis. Based on this model the forces applied on a drill string element are buoyed weight, axial tension, friction force and normal force perpendicular to the contact surface of the wellbore. The industry standard protocol, WITSML (Wellsite Information Transfer Standard Markup Language) is used to conduct transfer of drilling data between IDAs and the onsite or remote WITSML drilling data server. IDAs retrieves real-time drilling data such as surface hookload, pump pressure, rotary RPM and surface WOB from the data servers. The survey data measurement for azimuth and inclination versus depth along with the retrieved drilling data, are used to do the analysis in different drilling modes, such as lowering or tripping in and drilling. For extensive analysis the software can investigate the sensitivity of friction coefficient and downhole WOB on user-defined drill string element lengths. The torque and drag analysis module, as well as the real-time software, IDAs has been successfully tested and verified with field data from horizontal wells drilled in Western Canada. In the lowering mode of drilling process, the software estimates the overall friction coefficient when the drill bit is off bottom. The downhole WOB estimated by the software is less than the surface measurement that the drillers used during drilling. The study revealed verification of the software by comparing the estimated downhole WOB with the downhole WOB recorded using a downhole measuring tool.

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“…al [14] considering the effect of tubular buckling, the buoyancy, and friction reducer. TORQUE [15]: Surface torque is defined as the moment required rotating the entire drill string and the bit on the bottom of the hole. This moment is used to overcome the rotational friction against the wellbore, viscous force between pipe string and drilling fluid as well as bit torque.…”

Section: Introductionmentioning

confidence: 99%

FE Simulating of Torque and Drag inside Borehole of Oil and Gas Wells

Bagadi

Fadol

Gao³

2014

AMR

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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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Real-Time Wellbore Friction Analysis to Detect Onset of Drillstring Sticking during Extended Reach Well Drilling: Case Study

Cited by 7 publications

References 6 publications

Development of torque clutch drilling tool and evaluation of drag reduction performance

Development of torque clutch drilling tool and evaluation of drag reduction performance

Real-Time Software to Estimate Friction Coefficient and Downhole Weight on Bit During Drilling of Horizontal Wells

FE Simulating of Torque and Drag inside Borehole of Oil and Gas Wells

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