Inaccessible Drilling Targets and Completions Operation Made Possible by the Alleviation of Excessive Torque and Drag

McCormick, John; Long, Timothy; Frilot, Melissa Anne

doi:10.2118/125991-ms

Cited by 6 publications

(1 citation statement)

References 10 publications

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“…A drill pipe bearing sub is affected by the wellbore quality and the installation number, resulting in a poor drag-reduction effect [13][14][15]. For instance, a hydraulic oscillator is limited by the high circulating pressure loss and the short service life.…”

Section: Introductionmentioning

confidence: 99%

Drag‐Reduction Performance Evaluation of Controllable Hybrid Steering Drilling System

Zou

Chen

et al. 2021

Shock and Vibration

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The excessive drag/torque and the backing pressure is an important factor that restricts the improvement of the penetration rate and the extension of the drilling in the sliding drilling process of extended-reach wells and horizontal wells. To deal with this problem, this paper developed a novel controllable hybrid steering drilling system (CHSDS) based on the friction-reducing principle of a rotating drill string. The CHSDS is composed of a gear clutch, hydraulic system, and measurement and control system. By controlling the meshing and separation of the clutch with the mud pulse signal, the CHSDS has two working states, which leads to two boundary conditions. Combined with the stiff-string drag torque model, the effects of the drilling parameters on the friction-reducing performance of the CHSDS are analyzed systematically. The results show that the friction reduction effect in the inclined section is the most significant, followed by that in the horizontal section, whereas there is almost no impact in the vertical section. Friction reduction increases with the rotary speed and the drilling fluid density, whereas it decreases with the increase in the surface weight-on-bit and the bit reaction torque. Field tests confirm the separation and meshing function of the CHSDS. The developed controllable hybrid steering and friction-reducing technology provides an alternative approach for the safe and high-efficiency drilling of horizontal wells.

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Section: Introductionmentioning

confidence: 99%

Drag‐Reduction Performance Evaluation of Controllable Hybrid Steering Drilling System

Zou

Chen

et al. 2021

Shock and Vibration

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Adjustable Gauge Stabilizer and Torque and Drag Reduction Tools Reduce Overall Drilling Times by at Least 20%: A Case Study

McCormick

Osorio

Andachi

et al. 2011

SPE Middle East Oil and Gas Show and Conference

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Drilling more efficiently has always been an important consideration throughout the industry, but with the ever more complex and far reaching wells that are being drilled today, it has reached the stage of being a critical factor in the economic viability of many projects. This has lead to the development of many tools and techniques which have enhanced the overall process of drilling deviated wells and helped to realize significant savings in drilling time and improvements in well geometry. Two such developments are the adjustable gauge stabilizer (AGS) and torque-and-drag reduction tools, which provide a method of reducing drilling times in directional wells with build and tangent sections, thereby decreasing the cost while mitigating risk. An AGS eliminates the need to pull and replace the bottomhole assembly (BHA) after completing the build section, thereby saving one complete round trip. Torque-and-drag reduction tools enhance the ability to make directional adjustments while rotating and facilitate reaching well targets which high levels of torque and drag would otherwise prevent. As a result, the time spent drilling with a positive displacement motor (PDM) without pipe rotation (sliding) in the tangent section is mitigated, reducing overall drilling time for the section by an average of at least 20%. This paper will discuss the evolution, design and operational characteristics of these tools and will present case studies of wells drilled in Ecuador where either the application of both adjustable-gauge stabilizers and torque-reduction tools, or the application of an AGS reduced drilling time when compared to offset wells drilled with conventional directional assemblies.

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Torque and Drag Software Model Comparison: Impact on Application and Calibration of Field Data

McCormick

Frilot

Chiu³

2011

All Days

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With the number of extended-reach wells steadily increasing, software modeling has become a commonplace and essential process during a well's planning phase. Over the years, numerous computer programs have been developed to predict torque and drag (T&D) forces experienced during oilfield drilling and completion operations. Accurate prediction of T&D forces can reduce serious drilling operation risks such as buckling, pipe failures, box swelling and the inability to get liners and casing to total depth (TD).Most, if not all, industry available T&D software programs allow users to manipulate inputs such as friction factors, mud weight, and string component parameters, such as pipe weight, grade and dimensions. While the ability to alter the inputs in the T&D model is a practical necessity, the possibility of unknowingly impacting the calculations is an ever present danger. In addition to a thorough knowledge of how to input well parameters and analyze outputs, it is crucial for program users to question the reliability of each program and to understand the impact that changes in inputs have on the model's outputs. This paper will describe the technical differences between two T&D modeling programs, the underlying calculations, and the practical implications in terms of calibrating the two models to the same sets of field data. This paper also endeavors to increase knowledge and competency for T&D software users in the oil and gas industry.

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Inaccessible Drilling Targets and Completions Operation Made Possible by the Alleviation of Excessive Torque and Drag

Cited by 6 publications

References 10 publications

Drag‐Reduction Performance Evaluation of Controllable Hybrid Steering Drilling System

Drag‐Reduction Performance Evaluation of Controllable Hybrid Steering Drilling System

Adjustable Gauge Stabilizer and Torque and Drag Reduction Tools Reduce Overall Drilling Times by at Least 20%: A Case Study

Torque and Drag Software Model Comparison: Impact on Application and Calibration of Field Data

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