Coiled Tubing Erosion During Hydraulic Fracturing Slurry Flow

Shah, S.N.; Jain, S.; Zhou, Y.

doi:10.2523/89479-ms

Cited by 4 publications

(2 citation statements)

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“…The slurry erosion rate is known to be influenced by fluid flow variables; slurry concentration, slurry flow velocity, viscosity of slurry, properties of erodent particles; size, shape, and its hardness and the material properties. The effect of fluid dynamics and the erodent particle properties on slurry erosion has been well reported in the literature [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 89%

Effect of microstructure on slurry erosion behaviour of weld hardfacing alloys

Sapate

Haque

2011

Proceedings of the Institution of Mechanical Engineers, Part L:

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In the present work, the slurry erosion behaviour of weld hardfacing alloys was investigated by systematic variation of identified test parameters and the response data were generated from a suitably designed experimental plan. The identified groups of parameters were operational parameters; velocity, slurry concentration, and particle size of the erodent; and relative hardness of erodent particle and the microstructural parameter, carbide volume fraction (CVF). The slurry erosion experiments of hardfacing alloys with different Cr and C content were conducted using a pot-type slurry erosion tester with silica sand slurry of different concentration over a range of velocities. The slurry erosion volume loss of hardfacing alloys exhibited different trends under different test conditions with identified parameters. The slurry erosion volume loss decreased with increasing CVF and H e /H t , (ratio of hardness of erodent to hardness of target) except under severe erosion test conditions where the reverse trend was observed. An empirical correlation was proposed, in which the slurry erosion rate was expressed as a product of operational parameters, microstructural parameter, and relative hardness of erodent particles. Scanning electron microscopy observations were focused on gaining additional information associated with the mechanism of material removal under different experimental conditions.

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Section: Introductionmentioning

confidence: 89%

Effect of microstructure on slurry erosion behaviour of weld hardfacing alloys

Sapate

Haque

2011

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…An additional force arises due to the pressure gradient in the fluid The particle erosion model is used to simulate silt impact action as determined by the erosion rate [15][16][17]…”

Section: Governing Equationsmentioning

confidence: 99%

Analysis of silt abrasion and blade shape optimization in a centrifugal pump

Wang

Zhang

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part A:

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Water flow and silt movement in a double-suction centrifugal pump were simulated using an Euler–Lagrange multiphase flow model. Blade erosion rates were predicted using a particle erosion model and the influence of inlet and outlet shapes on silt abrasion was analyzed. The results show: the inlet relative velocity is larger on the suction side than on the pressure side; the blade inlet and outlet are severely silt abraded and the average erosion rate is always larger on the suction side than on the pressure side; the inlet relative velocity and the impact angle are two important influencing factors, and can be controlled by changing the inlet and outlet shapes to reduce erosion rate and increase pump efficiency. In this simulation, two effective means of reducing erosion rates are decreasing the hydraulic loss and increasing pump head and pump efficiency.

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Blowout Prevention and Relief Well Planning for the Wheatstone Big-Bore Gas Well Project

Upchurch

Falkner

House

2015

SPE Annual Technical Conference and Exhibition

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The offshore Wheatstone LNG Project in Western Australia utilizes subsea big-bore gas wells as the preferred method of producing the field. Wheatstone wells use a 9 -5/8" production conduit from the top of the gas pay zone to the ocean floor. Well bores of this size are necessary to match the large productive capacity of the gas reservoirs they penetrate. This producing scenario provides the obvious benefit of yielding large volumes of gas through the use of relatively few wells. Each of those highly productive wells, however, also represents a source of gas that, if accidently allowed to flow unhindered, could present an uncommonly difficult well control challenge. It is for this reason that the Wheatstone Drilling and Completions Team evaluated a wide range of possible reservoir and well architecture scenarios to fully understand the possible scale of relief well responses that might be necessary in the event of a blowout. The conclusions from this evaluation were surprising. Our originally-planned well design concept called for penetrating the Wheatstone gas reservoirs with a casing shoe set 950m vertically above. Our analysis indicated that 3-4 relief wells would be simultaneously required to bring a blowout under control. Based on these results, both the well and the drilling execution plan were redesigned to minimize the number of required relief wells. In summary, the redesign amounted to setting casing immediately (i.e., Յ 3m) above the gas reservoir before actually penetrating it, with the resulting benefit of reducing the required number of relief wells to 2. Although this reduction is beneficial, it should be noted that there is only one documented subsea case where 2 or more relief wells have been drilled with the intent of simultaneously pumping into both to effect a dynamic kill. Given this fact, our well control-related preparations for executing this project were more extensive than that of preceding projects. This paper chronicles the full extent of the engineering and operational planning performed to ensure that no uncontrolled hydrocarbon releases occurred during the execution of the Wheatstone Project's subsea big-bore gas wells and, if a blowout were to occur, that the response to such an unprecedented event would be sufficient and robust. Covered in the paper are (1) reservoir deliverability modeling, (2) dynamic kill modeling, (3) gas plume modeling, (4) relief well trajectory and mooring planning, (5) pilot hole execution planning, (6) a newly applied LWD technology for sensing resistivity vertically below the drill bit and (7) a discussion of future research that has been identified as necessary to better define the fluid injectivity capabilities of subsea relief wells.

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Coiled Tubing Erosion During Hydraulic Fracturing Slurry Flow

Cited by 4 publications

References 0 publications

Effect of microstructure on slurry erosion behaviour of weld hardfacing alloys

Effect of microstructure on slurry erosion behaviour of weld hardfacing alloys

Analysis of silt abrasion and blade shape optimization in a centrifugal pump

Blowout Prevention and Relief Well Planning for the Wheatstone Big-Bore Gas Well Project

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