Drilling and borehole techniques relevant to natural gas exploration and development: A collection of published research (2009–2015)

Wood, David A.

doi:10.1016/j.jngse.2015.06.024

Cited by 13 publications

(5 citation statements)

References 57 publications

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“…In order to meet the development of the world, the world's oil and gas extraction methods have developed rapidly from shallow to deep, or land to ocean. [3][4] With continuous increase in well depth, the challenges in drilling engineering are becoming more complex. 5 The worse drillability, uneven hardness distribution, and uncertain geological environmental factors of rock will generate larger challenges for rapid drilling technology.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic research and experimental analysis of a longitudinal–torsional coupled impactor

Tian

Zhe

2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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The rock breaking efficiency of drill bit is deeply affected with the increase of drilling depth. The increase length of the drill string leads to torsional stiffness decrease, which may even result in the stick-slip phenomena. In order to improve the rock breaking efficiency and reduce the stick-slip, this paper proposed a longitudinal–torsional coupled impactor. The internal working mechanism was carried out by theoretical analysis and experimental test. Moreover, comparing the computation and test results, the following conclusions can be obtained and verified. This innovative design can provide appropriate longitudinal-torsional coupled impact to drill bit during drilling process, and the movement of the hammer and pendulum is periodic. With the increasing flow rate of drilling fluid, this tool can generate corresponding larger impact force, torque and higher impact frequency. The theoretical analysis results are consistent with the experimental test results, which verify the reliability of the innovative design and the accuracy of theoretical analysis. This paper can provide reference for the innovative design of downhole drilling tool, the development of drilling dynamics and the improvement of drilling efficiency especially in the conditions of complex and ultra-deep wells.

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Section: Introductionmentioning

confidence: 99%

“…In order to meet the development of the world, the world’s oil and gas extraction methods have developed rapidly from shallow to deep, or land to ocean. 3–4 With continuous increase in well depth, the challenges in drilling engineering are becoming more complex. 5…”

Section: Introductionmentioning

confidence: 99%

Dynamic research and experimental analysis of a longitudinal–torsional coupled impactor

Tian

Zhe

2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Electromagnetic guidance tools, which include the magnetic guidance tool (MGT) [3], the Rotating Magnet Ranging Service (RMRS) system [4], the Wellspot Tool (WT) [5], and the Single Wire Guidance (SWG) [6] tool, can detect the distance between the drilling well and the existing well to avoid collision [1][2][3][4][5][6]. MGT and RMRS are applied in adjacent twin parallel Steam Assisted Gravity Drainage (SAGD) wells that guide the drilling of an injection well to ensure that it is parallel to the production well [2,3,[7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…WT is not suitable for the anticollision of cluster wells since the detection process requires pulling out the drilling tools. The SWG tool overcomes the disadvantages of the MGT and RMRS [1,4], namely, that neither reduces the workloads, nor requires pulling out the drilling tool to guide the detection device. However, there are three primary disadvantages of the SWG tool.…”

Section: Introductionmentioning

confidence: 99%

“…With cluster wells being used in more and more applications in land and sea environments, the borehole distance has been reduced from 2 m × 2 m to 1.5 m × 1.7 m [2,4], and infilling adjustment wells are usually added to the existing well pattern. The traditional anticollision scanning method is insufficient for cluster wells' anticollision.…”

Section: Introductionmentioning

confidence: 99%

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Anticollision Method of Active Magnetic Guidance Ranging for Cluster Wells

Dou

Liang

Liu

2018

Mathematical Problems in Engineering

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Conventional adjacent wells range scanning calculations cannot meet the accuracy demands of the anticollision measurement of borehole distances any longer. Current techniques commonly employ electromagnetic detection tools while drilling; this requires putting equipment down adjacent wells to avoid collision risks, which adds more workload and costs and sometimes even affects the normal production of the producing wells. Measuring and tracking adjacent borehole distances while drilling is an essential process that guides the drill bit and effectively avoids collisions with existing wells. This paper proposes an active anticollision method of rotating magnetic ranging based on double symmetrical magnetic sources with opposite magnetic moments. First, the proposed method uses magnetic sources in the drilling well that are built into the probe tube to generate a magnetic field; then, the ferromagnetic casing of the existing well would be magnetized by the abovementioned magnetic field; finally, the magnetization field of the ferromagnetic casing is measured by a triaxial magnetometer built into the probe tube to determine the spacing and position of the existing well. Simultaneously, the calculation models of magnetic flux density around the casing of the existing well and magnetic sources are established, the calculation formulae of the relative distance and position of two adjacent wells are deduced, and a new variable interval section segmentation is proposed based on the Cosine theorem. The simulation results demonstrate that the spacing and position of the existing well are determined based on the magnetic sources’ spacing inside the probe, the magnetic moment of the magnetic sources, the relative permeability of the casing, the diameter of the casing, and the inclination between the drilling well and the existing well. The validity and accuracy of the active magnetization model are confirmed, providing theoretical support for the further development of electromagnetic anticollision devices.

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Intelligent and integrated techniques for coalbed methane (CBM) recovery and reduction of greenhouse gas emission

Liang

Wang

et al. 2017

Environ Sci Pollut Res

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Coalbed methane (CBM) recovery is a crucial approach to realize the exploitation of a clean energy and the reduction of the greenhouse gas emission. In the past 10 years, remarkable achievements on CBM recovery have been obtained in China. However, some key difficulties still exist such as long borehole drilling in complicated geological condition, and poor gas drainage effect due to low permeability. In this study, intelligent and integrated techniques for CBM recovery are introduced. These integrated techniques mainly include underground CBM recovery techniques and ground well CBM recovery techniques. The underground CBM recovery techniques consist of the borehole formation technique, gas concentration improvement technique, and permeability enhancement technique. According to the division of mining-induced disturbance area, the ground well arrangement area and well structure type in mining-induced disturbance developing area and mining-induced disturbance stable area are optimized to significantly improve the ground well CBM recovery. Besides, automatic devices such as drilling pipe installation device are also developed to achieve remote control of data recording, which makes the integrated techniques intelligent. These techniques can provide key solutions to some long-term difficulties in CBM recovery.

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Drilling and borehole techniques relevant to natural gas exploration and development: A collection of published research (2009–2015)

Cited by 13 publications

References 57 publications

Dynamic research and experimental analysis of a longitudinal–torsional coupled impactor

Dynamic research and experimental analysis of a longitudinal–torsional coupled impactor

Anticollision Method of Active Magnetic Guidance Ranging for Cluster Wells

Intelligent and integrated techniques for coalbed methane (CBM) recovery and reduction of greenhouse gas emission

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