The Benefits of Monitoring Torque &amp; Drag in Real Time

Vos, Bart; Frank, Reiber

doi:10.2523/62784-ms

Cited by 10 publications

(5 citation statements)

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“…Many models deal with it as the linear relationship of drag. Vos and Reiber [5] predict the friction factor on a real-time system by dynamically updating the value while rotating off-bottom based on surface data. However, this only shows even distribution over the BHA while detail information remains hidden.…”

Section: Friction Factorsmentioning

confidence: 99%

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Sophisticated Software Analysis System and Use of Torque/Drag Modeling for Complex Well Operations Increases Operational Efficiency

Xie¹,

Moran

Lei

et al. 2012

SPE Western Regional Meeting

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Accurate torque and drag (T&D) analysis is a fundamental well planning tool essential for predicting and preventing drilling and completion problems. To guarantee an efficient and safe operation, tension/compression and torque on the bottom hole assembly needs to be controlled within acceptable limits. Practically all available torque and drag software can calculate the following general operation modes: rotating off-bottom, pick-up, slack-off, rotary drilling and oriented drilling modes.However in the well construction process, there are many other complex operational modes that are largely absent from available software systems, as discussed in the literature. The industry requires modeling methodology to analyze complex well operations including: setting and un-setting packers, anchoring liner hangers, shearing pins in wellbore departure operations, loading and operating drilling/fishing jars in both overpull and compression.The authors will discuss new modeling software capable of analyzing complex well operations including liner hanger and jarring operations in detail. Further discourse about how modeling these special operations were combined with field experience and confirmed the accuracy of the new module with regards to both special operations and conventional T&D capabilities. The simulation/analysis recommendations were successfully executed in the field and led to increased operational efficiency and unplanned cost avoidance. Case studies will be presented of successful liner hanger deployment and complex drilling jar simulation.

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Section: Friction Factorsmentioning

confidence: 99%

“…The objective is to predict and prevent drilling and completion problems before they occur [1][2][3][4][5][6][7][8][9][10]. This type modeling is becoming more critical with the advancement of techniques that include extended reach drilling (ERD), high temperature high pressure (HTHP) applications and complex wellbore geometries.…”

Section: Introductionmentioning

confidence: 99%

Sophisticated Software Analysis System and Use of Torque/Drag Modeling for Complex Well Operations Increases Operational Efficiency

Xie¹,

Moran

Lei

et al. 2012

SPE Western Regional Meeting

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“…The reasons for a deterioration of the friction condition can be caused by poor hole cleaning, hole collapsing, micro-tortuousity. The consequence of the friction increase is an abnormal evolution of the hook load in function of depth (Vos et al, 2000). When the increase in friction goes beyond a certain threshold, the system displays warnings in the drilling workstation, and the string movement is stopped until corrective actions have been taken (Cayeux, Daireaux, 2009).…”

Section: Maximum Overpull and Minimum Set-down Weightmentioning

confidence: 99%

Automation of Drawworks and Topdrive Management to Minimize Swab/Surge and Poor-Downhole-Condition Effects

2010

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Unwary axial and rotational movement of the drill-string can cause formation fracturing or fluid influx resulting in costly remedial actions. With increasingly complex wellbore geometries and narrow geo-pressure windows, it is not always obvious for the Driller to estimate the real manoeuvring limits of the drawworks and the topdrive, especially under poor downhole conditions. The solution presented in this paper uses continuously updated safe guards applied to the drilling control system to maintain a downhole pressure within the acceptable limits of the open hole formations. It also stops automatically the movement of the drill-string in case of abnormal hook loads or surface torques. Since automatic actions can be triggered in case of an unexpected situation, some standard procedures have been fully automated, including friction tests and backreaming.Numerical models are used to constantly calculate the maximum accelerations and velocities which can be applied to the drill-string in the current drilling conditions. The resulting envelope of protection is depending on many factors. Therefore, a proper evaluation of the downhole conditions is of paramount importance for the quality of the calculated safe guards. An automatic calibration of the physical models, based on surface measurements, is at the heart of the system. The calibrated mechanical models are used to determine the limits for abnormal surface torques or hook loads. It is therefore possible to automatically take actions in case of overpull, set-down weight or high torque.In 2008, a preliminary version of the system has been tested during the drilling of a well in the North Sea. Even though the control algorithms did work well at that time, it has been noticed that in some circumstances the drilling control system would not be ready in time for fast changing drilling conditions. An improved version of the drawworks and topdrive automation system has been tested during the drilling of three North Sea wells in the spring of 2009. In this last version, the response time of the system has been optimal at all time. The Drillers involved in the testing of the system have found the system useful and user-friendly.

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“…The measured hook load can be used to identify any increase or decrease in friction of the drill string that was lowered into the wellbore 5 . An increase in hook load of the same drill string with the same length can for example be interpreted as an increase of the friction in the wellbore.…”

Section: Surface Hook Load Analysismentioning

confidence: 99%

Automated Real-Time Hookload and Torque Monitoring

Kucs

Spoerker

Thonhauser

et al. 2008

IADC/SPE Drilling Conference

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Today important parameters to enable a reduction of lost and hidden lost time during drilling, like hook loads for pulling and slacking off the drill string, and torque for drill string rotation, are still taken manually. Analysing torque trends during drilling and reaming is hardly done.A key to reduce lost and hidden lost time by analysing drilling data is to automatically recognize ongoing operations in real time from this data. That allows the automatic identification and picking of pulling-up; slacking-off and rotating hook loads, as well as torque values without spending extra time or work force. Relevant parameters can be sampled and analysed automatically in real time from the rig sensor data stream without interfering drilling operations. This automated process allows monitoring changing torque and drag trends for each stand of drill string moved during drilling, tripping, or reaming operations. To monitor trends in the torque and drag development in real time, parameters may be combined with simulated hook load and torque curves in a graphical way. Simulated values are imported from engineering applications. This allows the user to react immediately, not only after hand taken values are manually entered into a graph. The possibility to broadcast all the data to computers worldwide enables a great level of cooperation. Instant measures against increasing torque and drag can be taken before reaching critical ranges on a stand per stand basis. Also excessive reaming and washing can be avoided as low torque and drag may be an indication for a good hole quality. This can save wellbore treatment time. The paper presents the development of the system, its validation against live well data from recent 20,000ft wells in the Vienna basin and the planned application of the system on an extended reach field development project offshore New Zealand.

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The Benefits of Monitoring Torque & Drag in Real Time

Cited by 10 publications

References 0 publications

Sophisticated Software Analysis System and Use of Torque/Drag Modeling for Complex Well Operations Increases Operational Efficiency

Sophisticated Software Analysis System and Use of Torque/Drag Modeling for Complex Well Operations Increases Operational Efficiency

Automation of Drawworks and Topdrive Management to Minimize Swab/Surge and Poor-Downhole-Condition Effects

Automated Real-Time Hookload and Torque Monitoring

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