A novel intelligent sliding sleeve for shale oil and gas mining equipment

Zhang, Junhui; Yang, Meisheng; Xu, Bing; Ding, Ruqi; Cheng, Min; Dong, Pengpeng

doi:10.1016/j.petrol.2017.07.069

Cited by 12 publications

(4 citation statements)

References 13 publications

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“…Based on the principle of the sliding sleeve (Yang et al, 2014;Zhang et al, 2017;Li et al, 2018;, the multi-stage fracturing technique has been achieved by a selfdesigned wellbore under experimental conditions. The process of three staged fractures is displayed in Figure 2.…”

Section: Experimental Apparatus and Staged Fracturing Designmentioning

confidence: 99%

A multi-perforation staged fracturing experimental study on hydraulic fracture initiation and propagation

Wei

Huang

Hao

et al. 2020

Energy Exploration & Exploitation

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Hydraulic fracture initiation and propagation are extremely important on deciding the production capacity and are crucial for oil and gas exploration and development. Based on a self-designed system, multi-perforation cluster-staged fracturing in thick tight sandstone reservoir was simulated in the laboratory. Moreover, the technology of staged fracturing during casing completion was achieved by using a preformed perforated wellbore. Three hydraulic fracturing methods, including single-perforation cluster fracturing, multi-perforation cluster conventional fracturing and multi-perforation cluster staged fracturing, were applied and studied, respectively. The results clearly indicate that the hydraulic fractures resulting from single-perforation cluster fracturing are relatively simple, which is difficult to form fracture network. In contrast, multi-perforation cluster-staged fracturing has more probability to produce complex fractures including major fracture and its branched fractures, especially in heterogeneous samples. Furthermore, the propagation direction of hydraulic fractures tends to change in heterogeneous samples, which is more likely to form a multi-directional hydraulic fracture network. The fracture area is greatly increased when the perforation cluster density increases in multi-perforation cluster conventional fracturing and multi-perforation cluster-staged fracturing. Moreover, higher perforation cluster densities and larger stage numbers are beneficial to hydraulic fracture initiation. The breakdown pressure in homogeneous samples is much higher than that in heterogeneous samples during hydraulic fracturing. In addition, the time of first fracture initiation has the trend that the shorter the initiation time is, the higher the breakdown pressure is. The results of this study provide meaningful suggestions for enhancing the production mechanism of multi-perforation cluster staged fracturing.

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Section: Experimental Apparatus and Staged Fracturing Designmentioning

confidence: 99%

A multi-perforation staged fracturing experimental study on hydraulic fracture initiation and propagation

Wei

Huang

Hao

et al. 2020

Energy Exploration & Exploitation

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“…Taking the EMS with standard dipper capacity of 55 m 3 as an example, the modeling process of the hoist system using hierarchical way is shown in Figure 2. Firstly, the hoist system can be divided into mechanical system and control system in physics [15]. e mechanical system can be split into three subsystems including reducer shell subsystem, gear subsystem, and rope subsystem.…”

Section: Hierarchical Modeling Of Hoist Systemmentioning

confidence: 99%

Hierarchical Modeling and Dynamic Analysis of Hoist System in Electric Mining Shovel

Sun

Wang

et al. 2018

Shock and Vibration

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The hoist system of electric mining shovel (EMS) always encounters excessive vibration in present work. However, the shortage of suitable dynamic model has been the bottleneck of reducing vibration. In order to analyze the vibration of the EMS hoist system, a coupled dynamic model is proposed using the hierarchical modeling method, which contains couplings of bolt, bear, coupling, rope, and gear mesh. The components were equivalent to mass elements with several nodes corresponding to their structure. Considered helical gears and motors, a dynamic gear transmission model with couplings of bending, torsion, and axes was developed. Based on the dynamic model, the modal characteristics were calculated, and the vibration modes were classified to five types. Under the ripple drive torque simulated by Simulink, the dynamic characteristics of the hoist system in time domain and frequency domain were obtained using numerical integration with the Runge–Kutta method in Matlab. At last, the model validity was verified by contrasting the responses under actual test and the model. The dynamic model and study results can provide support for dynamic characteristic evaluation and dynamic optimization of the EMS hoist system.

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“…A miniature solenoid valve suitable for oil and gas wells under the high temperature and high-pressure mining environment was developed by Zhejiang University [ 16 ]. The miniature solenoid valve can be seen in Ref.…”

Section: Introductionmentioning

confidence: 99%

“…The miniature solenoid valve can be seen in Ref. [ 16 ] (Figure 16). Considering the special working conditions, the size of the micro valve is 20 mm, the maximum working pressure is 21 MPa and the flow rate is 2 L/min by the optimization of the valve body material and the matching of the parameters of the electromagnetic field.…”

Section: Introductionmentioning

confidence: 99%

Design and Experimental Research of a Miniature Digital Hydraulic Valve

Zhang

Yang

2018

Micromachines

Self Cite

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A digital hydraulic valve is an important component of the digital hydraulic system, and its performance is directly related to the system function. In order to make the valve system more competitive in dimension, digital valve miniaturization is an important research point. A new micro digital valve is designed, which is analyzed from the mechanical structure and magnetic circuit mechanism, and the design difficulties are also expounded. The four subsystems and switching characteristics of the valve are theoretically analyzed and simulated. In order to test the performance of the valve, a test system is designed, and performance of the new micro valve is tested. The test results show that the switch characteristic analysis of the valve is correct. The comparison between the test curve and the simulation curve is carried out, which demonstrates that the accuracy of the simulation model is reasonable. The theoretical analysis of the new micro digital valve is consistent with experiments.

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A novel intelligent sliding sleeve for shale oil and gas mining equipment

Cited by 12 publications

References 13 publications

A multi-perforation staged fracturing experimental study on hydraulic fracture initiation and propagation

A multi-perforation staged fracturing experimental study on hydraulic fracture initiation and propagation

Hierarchical Modeling and Dynamic Analysis of Hoist System in Electric Mining Shovel

Design and Experimental Research of a Miniature Digital Hydraulic Valve

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