The Development of Wireline-Tractor Technology

Schwanitz, Brian; Henriques, Kristine

doi:10.2118/0209-018-twa

Cited by 14 publications

(6 citation statements)

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“…Modellünk hasonlít a generikus rúd-csukló szerkezetekhez [16], [22], [12]. A szerzők foglalkoznak a letűzési problémákkal is, amely azt kérdezi, hogy adott szerkezetnek melyik csuklóit kell különböző kényszerekkel " rögzítenünk", hogy merev szerkezethez jussunk [21], [11]. Bevezethettük volna modellünketúgy, hogy egy rúd-csukló szerkezet néhány rúdját kinevezzük szálnak,és ezek csuklóiraírunk elő szál (kinevezés előtt rúd) irányú lineáris kényszereket, hasonlóan a letűzési problémához.…”

Section: Lehetséges Előzményekunclassified

Összekapcsolt, axiális irányban mozgó szál hálózatok merevségének jellemzése gráfokkal

Nagy¹

2019

AML

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Section: Lehetséges Előzményekunclassified

Összekapcsolt, axiális irányban mozgó szál hálózatok merevségének jellemzése gráfokkal

Nagy¹

2019

AML

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“…[1][2][3][4] Due to the special structure of horizontal well, traditional method of conveying equipment by gravity has been unable to meet the current requirements, so researchers invented a new kind of horizontal well dragging system, which is called the downhole traction in-pipe robot. [5][6][7] As the well depth and length increases, borehole equipment requires to be transported in the further place, and several thousand meters of cables should be dragged along, so downhole traction in-pipe robot (DTIRobot) should have the strong drag and pull capability. In addition, the diameter of the borehole is irregular due to the rapid deviation and large degree of doglegs, which requires DTIRobot to ensure continuous and stable motion in the narrow space.…”

Section: Introductionmentioning

confidence: 99%

“…1–4 Due to the special structure of horizontal well, traditional method of conveying equipment by gravity has been unable to meet the current requirements, so researchers invented a new kind of horizontal well dragging system, which is called the downhole traction in-pipe robot. 5–7…”

Section: Introductionmentioning

confidence: 99%

Design and analysis of a hydraulic drive downhole traction in-pipe robot based on flexible support structure

Shang

Fang

Luo

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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For the strict requirement of convey tools in horizontal well operation, this paper proposes a hydraulic drive downhole traction in-pipe robot based on the flexible support structure, which has the characteristics of compact structure, large traction force, and high reliability. Based on the design of mechanical structure, the motion principle of the robot continuous propulsion is analyzed. Analysis of mechanical characteristics of the flexible support structure is obtained. Hydraulic system including some key hydraulic components are designed and analyzed. Control strategy of purely hydraulic drive mode is researched. Simulation analysis and experimental platform are all accomplished to prove feasibility of purely hydraulic drive mode, and some parameters that affect the robot performance are discussed. Results show that the novel in-pipe robot has a total length of 3.4 m and can adapt to borehole diameter of 155–218 mm. When load is 15 kN, robot motion speed reaches 0.12 m/s. What is more, this novel traction robot does not require an electric power source and has great advantages in safety and reliability, which shows considerable potential for the downhole operation.

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“…Since the vast majority of the horizontal oil-producing well casing, tubing and well-logging instruments are designed as an axisymmetric cylindrical structure, the well-logging measurement instruments usually need to rely on gravity or a horizontal crawler reaching the downhole oil-layer measuring section [29,30]. Consequently, the work position of the welllogging instruments after the axial rotation cannot be determined.…”

Section: Introductionmentioning

confidence: 99%

The influence on response of axial rotation of a six-group local-conductance probe in horizontal oil–water two-phase flow

Kong

et al. 2017

Meas. Sci. Technol.

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Water volume fraction is an important parameter of two-phase flow measurement, and it is an urgent task for accurate measurement in horizontal oil field development and optimization of oil production. The previous ring-shaped conductance water-cut meter cannot obtain the response values corresponding to the oil field water conductivity for oil–water two-phase flow in horizontal oil-producing wells characterized by low yield liquid, low velocity and high water cut. Hence, an inserted axisymmetric array structure sensor, i.e. a six-group local-conductance probe (SGLCP), is proposed in this paper. Firstly, the electric field distributions generated by the exciting electrodes of SGLCP are investigated by the finite element method (FEM), and the spatial sensitivity distributions of SGLCP are analyzed from the aspect of different separations between two electrodes and different axial rotation angles respectively. Secondly, the numerical simulation responses of SGLCP in horizontal segregated flow are calculated from the aspect of different water cut and heights of the water layer, respectively. Lastly, an SGLCP-based well logging instrument was developed, and experiments were carried out in a horizontal pipe with an inner diameter of 125 mm on the industrial-scale experimental multiphase flow setup in the Daqing Oilfield, China. In the experiments, the different oil–water two-phase flow, mineralization degree, temperature and pressure were tested. The results obtained from the simulation experiments and simulation well experiments demonstrate that the designed and developed SGLCP-based instrument still has a good response characteristic for measuring water conductivity under the different conditions mentioned above. The validity and reliability of obtaining the response values corresponding to the water conductivity through the designed and developed SGLCP-based instrument are verified by the experimental results. The significance of this work can provide an effective technology for measuring the water volume fraction of oil–water two-phase flow in horizontal oil-producing wells.

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The Development of Wireline-Tractor Technology

Abstract: Tech 101 In this new series, TWA examines some of the most significant upstream technologies being employed today. This first installment focuses on well tractors.

Cited by 14 publications

References 0 publications

Összekapcsolt, axiális irányban mozgó szál hálózatok merevségének jellemzése gráfokkal

Összekapcsolt, axiális irányban mozgó szál hálózatok merevségének jellemzése gráfokkal

Design and analysis of a hydraulic drive downhole traction in-pipe robot based on flexible support structure

The influence on response of axial rotation of a six-group local-conductance probe in horizontal oil–water two-phase flow

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