Dynamic Simulation of Erosion Failure of a Hydraulic Jet Tool via Discrete Phase Model
- PDF / 1,393,101 Bytes
- 8 Pages / 595.276 x 790.866 pts Page_size
- 73 Downloads / 259 Views
TECHNICAL ARTICLE—PEER-REVIEWED
Dynamic Simulation of Erosion Failure of a Hydraulic Jet Tool via Discrete Phase Model Jingze Li . Linlin Sun . Xun Qiao
Submitted: 8 January 2019 / Accepted: 11 August 2019 / Published online: 4 September 2019 Ó ASM International 2019
Abstract Hydraulic perforating technology uses the erosion of high-velocity solid–liquid flow to punch or cut the target wall. During the perforating process, the highvelocity two-phase flow will bound back to the outer wall of the tool to cause erosion damage, and in severe cases, the tool will fail. In this paper, the discrete phase model was used to obtain the parameters of particles rebound from target wall, and then get the erosion characteristics of outer wall of jet tool including erosion rate and erosion distribution. The critical parameters of 35CrMo erosion were obtained from a solid–liquid jet flow experiment. The calculated results show that the impact velocity and angle of particle on the tool surface are significantly affected by perforation depth. The erosion rate of outer wall of tool will decrease with the increase in perforating depth. The effect of jet flow velocity on eroded areas is more than erosion rate. From that, the erosion rate is mainly affected by the injection velocity of the perforating fluid, while the erosion region is determined by the perforation depth. Keywords Hydraulic jet tool Hydraulic perforation Solid–liquid two-phase flow Splash erosion Discrete Phase Model
Introduction Hydraulic perforation technology, which uses high-velocity solid–liquid jet flow to perforate casing, cement sheath and formation rock, is widely used in well completion of J. Li (&) L. Sun X. Qiao School of Mechanical Engineering, Xijing University, Xi’an 710123, China e-mail: [email protected]
123
gas and oil field to improve operation efficiency and reduce the pollution caused by traditional perforation [1]. In the process of hydraulic perforation, the sand-carrying liquid is sprayed out rapidly by the principle of nozzle throttling, and the target material is eroded by solid particle impacts to form perforation channels. Due to the high jet velocity required by perforating technology, the tubing and jet tool itself will suffer serious erosion, which will lead to the failure of perforation. Figure 1 shows the flow process of liquid in a hydraulic jet tool. The solid–liquid flow is sprayed from the inside of the tool through the nozzle to the surface of the casing, which produces a throttling pressure difference of up to several megapascals. Figure 2 shows the external splash erosion morphology of the perforation tool. The surface around the nozzle is damaged by splash erosion until it falls off, which may cause equipment safety accidents and economic losses of up to several hundred thousand in an accident. The principle of hydraulic perforation is the use of the impingement of high-velocity particle to erode the metal and rock. The erosion rate of target surface is mainly affected by the particle impact frequency and particle
Data Loading...
