SU1390351A1 - Installation for investigating seepage of suspensions and colmatage of rock - Google Patents

Description

(21) 4108943/22-03

(22) D / .08.86

(46) 04.23.88. Bion. № 15 (71) -Bashkir State Research and Design Institute of the Oil Industry (72) P.P. Lukmanov, V.N. Polk, RT Asfandi ditch and A.G. Khamzin (53). 622.23.05 (088.8)

(56) Polkov V.N., Lukmanov P.P.

et al. Improving the efficiency of uncoupling and isolating productive formations during their drilling. - M .: VNIIOENG, RITS. Drilling, 1979, Ex. 9y sec. 8-10.

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(54) INSTALLATION FOR RESEARCH OF SUSPENSION FILTRATION AND MOUNTAIN SPECIES

(57) The invention relates to mining. The purpose of the invention is to increase the reliability of research results due to the possibility of using-. gaping high pressure drops

and mixing jets working

bones relative to cores of the studied rock. For this, the installation has a pipe 3 with radial holes, mounted in the housing 1 coaxially with it for rotation and axial movement. Between the pipe 3 and the housing 1, a sealing flange 12 is provided to create a counterpressure. The pipe 3 is connected to the core holder 2 and the drive for it. The tube cavity is connected to the pump 5, and the hydraulic motor nozzles 4 are fixed in the holes of it. The core holders 2 are fixed on the lateral surface of the housing. A compensator 15 for pressure oscillations is associated with pump 5. The cavity of the housing 1 is connected via a pipeline 8 with a tank 7 for a washing liquid. The fluid is pumped into the pipe 3 and flows out of the nozzles 4 at high speed. During the rotation of the pipe 3, a stream of fluid acts on rock samples installed in core holders for a specified time. 1 hp f-ly, 1 ill.

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The invention relates to mining, in particular to devices for investigating the filtration of suspensions and clogging of rocks and can be used in the construction of wells with the use of a jet effect.

The purpose of the invention is to increase the reliability of research results due to the possibility of using high pressure drops and jet movement relative to the cores of the studied rock.

The drawing shows the setup for the study of the filtration of suspensions and clogging of rocks.

The installation includes a cylindrical body 15 of the core holders 2 of the rock studied, fixed on the lateral surface of the body 1, a pipe 3 with radial holes mounted in the body 1 coaxially with it for rotation and axial movement, jetting nozzles 4 installed in the radial holes of the pipe 3, pump 5 for supplying the working fluid connected through the swivel 6 to the pipe cavity, 7 tank for washing liquid, communicated with the pump 5 and through pipe 8 to the cavity of the housing 1, the drive for pipe 3 including electric motor 9, reducer 10 to longitudinal displacement mechanism 11, sealing fdans 12 installed between pipe 3 and housing 1, system 13 for generating counterpressure associated with core holders 2, hydraulic pressure regulator 14, pressure compensator 15, connected - with pump 5, and control unit 16 with instrumentation

The installation works as follows.

Fluid (polymer, clay, cement and other solutions) by pump 5 using a pressure fluctuation compensator 15 through a swivel 6 attached to pipe 3, is pumped into pipes 3 and exhausts at high speed from nozzles 4. When the pipe 3 rotates and linearly moves with respect to core holders 2, the liquid jet acts on rock samples installed in core holders 2 for a given contact time. Contact time

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is guided by setting the required frequency (rpm) of the gearbox 10, rigidly connected with the electric motor 9 and the pipe 3 through the mechanism 11 for longitudinal movement. The fluid then flows through the annular space between the pipe 3 and the housing 1 through the pipe 8 into the tank 7. To simulate the reservoir and well pressure, the installation contains a system 13 of counterpressure on the cores and sealing flanges 12. The control unit 16 allows you to adjust and record during the experiment changes in the main parameters: volume flow rate of fluid, dynamic pressure of the jet on the obstacle, pressure in various parts of the installation.

The invention allows studies to be carried out with large pressure drops (up to 15 MPa) and jet movement relative to the core. Due to the approach of the test conditions to real parameters such as pressure drops (between the well and the reservoir), the nature of the pressure and the speed of the jet, it is possible to increase the reliability of the results and the quality of research on the filtration, fracture and mineral and rock processes.

Claims (1)

1. Installation for investigating the filtration of suspensions and clogging of rocks, comprising a cylindrical body, core holders for the studied rock fixed on the body, jetting nozzles, a pump for supplying the working fluid connected to jetting nozzles, a tank for flushing fluid communicated with the pump, and the control unit, characterized in that, in order to increase the reliability of the research results due to the possibility of using high pressure drops and moving the working liquid jets, cores of the studied rock, it is equipped with a pipe with radial holes, installed in the housing coaxially with it for rotation to axial movement, sealing flanges installed between the pipe and the housing, a system for creating backpressure connected to core holders, and a drive 31390351 for a pipe, while the cavity of pipe 2, Installation according to claim, 1, o tl and connected to the pump, hydraulic monitor with the fact that it is equipped with a valve is fixed in the radial shaft with a compensator for the oscillations of the pipe bore, and the core holders connected to the pump and the cavity secured to the outer side surface of the housing is connected by pipeline housing with a flushing fluid container.