Flow structure of aqueous solutions of polyethylene oxide in the inlet region of short capillaries

Ivanyuta, Yu. F.; Naumchuk, N. V.; Pogrebnyak, V. G.; Tverdokhleb, S. V.; Frenkel, S.Ya.

doi:10.1007/bf00871917

Cited by 4 publications

(2 citation statements)

References 4 publications

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“…In accordance with the obtained pictures of the current lines in the inflow area of the capillary [15], we assume that the effect of the hydrodynamic field on the element of the solution volume, leading to the stretching of this element, starts at some distance y s from the center of the capillary inlet y = 0. The axis y in this case is the axis of symmetry of the flow and is connected with the center of the capillary inlet.…”

Section: Resultsmentioning

confidence: 96%

Coil-Uncoiled Chain Transition of Polyethylene Oxide Solutions under Convergent Flow

Pogrebnyak¹,

Chudyk²,

Pogrebnyak³

et al. 2019

ChChT

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The coil-uncoiled chain transition under convergent flow of polyethylene oxide aqueous solutions has been studied. The possibility of this transition has been confirmed by the experiments. The fields of velocities and their gradients arising at the entrance of a small capillary during the convergent flow have been examined. It was found that water-polyethylene oxide system under convergent flow and certain flow regimes is self-regulating one with a negative feedback. The latter manifests itself in the following: accelerated longitudinal gradients of velocity lead to deformation of macromolecular coils, followed by a rearrangement of the flow in such a way as to increase the impact time of the longitudinal velocity gradient on macromolecules. The hydrodynamic field arising under the convergent flow provides a considerable degree of polymer uncoiling and coil-uncoil chain transition.

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Section: Resultsmentioning

confidence: 96%

Coil-Uncoiled Chain Transition of Polyethylene Oxide Solutions under Convergent Flow

Pogrebnyak¹,

Chudyk²,

Pogrebnyak³

et al. 2019

ChChT

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“…That is, the cutting hydro-abrasive jet in the inlet section of the hydro perforator nozzles must be replaced by a polymer solution jet. [2][3][4] The polymer must be a safe substance which is approved for use in the oil and gas industry. Such polymers include PEO, polyacrylamide (PAA) or hydrolysed polyacrylamide (HPAA).…”

Section: Trends In Petroleum Engineeringmentioning

confidence: 99%

The Water-Polymer Method of Hydroperforation of Oil and Gas wells

Pogrebnyak¹

2023

TPE

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The aim of the study is to develop an efficient, innovative method of perforating oil and gas well casing strings with a high-velocity stream of polymer solution that conserves resources and energy and meets the requirements for environ- mentally friendly hydrocarbon production. New knowledge about the dynamics of polymer solutions in the model conditions of flow through the nozzles of the hydro perforator, which form a high-velocity jet, became the main scientific basis for substantiating the water-polymer method of hydro perforation of oil and gas wells. The study of the reaction of polymer solutions to tension hydrodynamic influence allowed to formulate a structural concept, the "common denominator" of which is the strong deformation effect of tension hydrodynamic field on high molecular weight coils, which, according to nonequilibrium thermodynamics, should cause a kind of high elasticity. Peculiarities of hydrodynamic behavior of aqueous polymer solutions in model conditions of flow through jet-forming nozzles are studied. The possibility of transition to a highly developed state of the tangle of polyethylene oxide macromolecules in the conditions of the inlet section of the nozzle of the hydro perforator has been experimentally proved. The mechanism of perforation of oil and gas wells by a high-velocity jet of an aqueous polymer solution has been elucidated. It is proved that the mechanism of the high cutting ability of the high-velocity jet of aqueous polymer solution is the destructive effect of the dynamic pressure of water-polymer jet "reinforced" by highly developed macromolecular chains in the inlet nozzles of the hydro perforator nozzles under the action of tensile leakage. Experimental and industrial testing of the method of perforation of wells by a high-speed jet of an aqueous solution of polyethylene oxide confirmed the practical and economic feasibility of its use.

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2012

Boundary Layer Flow Over Elastic Surfaces

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Flow structure of aqueous solutions of polyethylene oxide in the inlet region of short capillaries

Cited by 4 publications

References 4 publications

Coil-Uncoiled Chain Transition of Polyethylene Oxide Solutions under Convergent Flow

Coil-Uncoiled Chain Transition of Polyethylene Oxide Solutions under Convergent Flow

The Water-Polymer Method of Hydroperforation of Oil and Gas wells

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