The method of discharge of fluid in the mountain range and the device for its implementation

 

(57) Abstract:

The invention relates to mining and can be used for softening and moisturizing the rocks. An object of the invention is to increase the efficiency of the process through gradual and uniform influence on a rock mass and increasing radius of processing depending on the permeability of reservoir properties of the array. The method of pumping fluid includes drilling, sealing and pumping liquids mnogoplunzhernogo pumping unit. First handle bore fluid under pressure natural absorption to its stabilization. After that, well pump fluid in a pulsed mode until hydraulic fracturing. The pulses in each well served with phase shift. Device for injection of fluid in the massif includes mnogoplunzhernogo pump unit having discharge and suction valves, a tank of liquid, a supply line to the fluid control equipment. Low-pressure pump is included in the line for the fluid. Switching from one mode to another occurs through distributors, each with its p the irradiation of the plunger, and the output of the distributor is connected to the input of one or more sealants wells. 2 S. and 1 C.p. f-crystals, 2 Il.

The invention relates to mining and can be used for softening and moisturizing of the rocks.

There is a method of humidifying the mountain massif, which consists in the fact that in a drilled well is pumped fluid pump constant performance (Catalogue "Equipment and devices for integrated dust control in coal mines, mines and processing plants". M., 1979, S. 3-14).

The disadvantage of this method is its low efficiency due to the lack of accounting filtration reservoir properties of the array and the fluid under constant pressure.

There is a method of humidifying mountain range, lies in the fact that through using pulsed devices, the liquid is served in the well at a constant pressure and frequency of 100-150 Hz (safety of mining operations coal mines". Kemerovo, 1991, S. 44-50). The disadvantage of this method is that the pulses in the empty hole, and after the filling serves pulses at 100-150 Hz, resulting pulses are smoothed out.

There is also known a method of Nagata Way is in the preliminary determination of the value of the hydraulic resistance of the layer, drilling, sealing and subsequent injection of liquids under pressure through mnogoplunzhernogo pump unit, which accumulates a part of the liquid depending on the filtration properties of the reservoir. When the pressure of fluid in the pump unit value of the hydraulic resistance of the layer simultaneously with the injection of fluid into the reservoir accumulated part of the liquid is served in the working cavity of the cylinder of the pump installation.

A device for implementing this method includes mnogoplunzhernogo pump installation, podlozhennye working cavity which is supplied with discharge and suction valves, the line for the fluid, a tank for fluid, sealants wells and test equipment. Each cylinder pump unit is equipped with a storage tank communicated with the working cavity of the cylinder.

The known method and device do not provide sufficient processing efficiency due to the fact that during continuous pumping under pressure the liquid initially reveals cracks deeper and larger diameter. The result is premature fracturing and the radius of the processing Neva is t gradual and uniform influence on a rock mass and increasing radius of processing depending on the permeability of reservoir properties array as well as reducing the energy intensity of the process.

To solve this problem, a method for pumping fluid in a mountain range at which the drilling of wells, seal them and pump fluid under pressure mnogoplunzhernogo pumping unit. Moreover, the first well is filled with fluid under pressure natural absorption until it stabilize, then the well pump fluid in a pulsed mode until hydraulic fracturing. The pulses in each hole serves to shift the phase.

Also proposed a device for injection of fluids in the rock mass, including mnogoplunzhernogo pump installation, podlozhennye working cavity which is supplied with discharge and suction valves, a tank for fluid line for supplying fluid, sealants wells, test equipment, low-pressure pump and the valves on the number of plungers pump unit having the ability to supply fluid to one or more wells.

Low-pressure pump is included in the line for the fluid. The first input of each of the distributor through the line for the fluid connected to the output of the low-pressure pump, the divider is connected to the input of one or more of hermetization wells.

In addition, the device includes an additional valve, the inlet of which is connected to the tank for the liquid, and its outputs are connected respectively with the inlet and outlet of a low pressure pump.

The invention is illustrated by drawings, where Fig. 1 shows a hydraulic diagram of the device for injection of fluid into an array, and Fig.2 (a) -) - hydraulic pulses generated by each plunger pump unit on the example of processing of the three wells.

The device consists of mnogoplunzhernogo pump unit 1 with the pistons 2 and podlozhennye working cavities 3, each of which is equipped with 4 suction and discharge 5 valves. All nakladannye camera suction valve 4 is connected in parallel with each other and with the line 6 for the fluid. The latter is connected to the tank for liquid 7 through the low-pressure pump 8. With the release of the low-pressure pump 8 connected to the first inputs of the valves 9. The second inputs of the valves 9 are connected with nakladannye cameras injection valves 5 of the respective plungers pump unit 1. The output of each of the distributor 9 through one or more of the dock shelter 10 is connected respectively with one or more obrabecim the gauges 13.

It is sometimes possible to feed fluid into the wells 11 of the tank 7 under the action of the geodetic pressure due to the difference of the height of the tank 7 and the bore 11. For this purpose an additional dispenser 14, bypass the low-pressure pump 8. Additional dispenser 14 is connected by its inlet to the outlet of the tank for liquid 7, one of its outputs connected to the input of the low-pressure pump 8, and the other through the line 15 with the output Nikonorova pump 8.

The method of injection fluid into an array using this device is as follows.

Depending on the physical and technical properties of the array and apply the liquid are determined by the value of the hydraulic resistance in the rock mass and pressure of the natural absorption. The value of the hydraulic resistance of the massif is determined by the pressure by pumping fluid into the well to a pressure at which occurs the formation of long cracks in the array. The pressure natural absorption is determined by the moment of its stabilization after full saturation of microcracks and pre-impregnation well. On the obtained pressure values and taking into account the adopted technology of processing the massif of the venous absorption. In addition, it defines the volume of liquid and the time required to reach the maximum pressure and the pressure natural absorption to its stabilization.

The liquid from the tank 7 when the opening of the valve 14 by gravity (if the tank is above the level of the treated wells) or by using low-pressure pump 8 is supplied to the line 6 and the valve 9, when opened, the liquid through one or more dock shelter 10 is supplied respectively to one or more of the wells 11. The flow of the liquid in the mode of natural absorption, i.e., to fill existing array of microcracks, is carried out at a pressure not exceeding 0.5 to 2 MPa. Thus there is an effective initial hydration and softening of the array at low cost electricity. Fluid flow in the borehole terminated at the time of stabilization of pressure in the well. In wells where there is a sharp pressure drop, the process further processing is stopped. After stabilization of the pressure in the well with the help of the distributor 9 off highway 6 and turns on the pump unit 1 high pressure.

Pulse-portions, fluid flow is carried out during rotation of the crankshaft of Nason the Siwa hydraulic pulses, shifted in phase and with pressures up to 50 MPa provides numerous education deep cracks, resulting in a mountain range more evenly moistened and is softened.

At the initial moment the fluid starts to be supplied, for example, in the first (lower) well, pre-treated in the mode of natural absorption. The second (middle) well this is a liquid with a maximum amplitude of pressure P2and in the third (top) borehole pulse is not supplied. At this point in the third hole may be lled with liquid from the tank 7 at a pressure natural absorption until its stabilization.

At time T1in the first well is liquid with a maximum amplitude of the P1, fluid flow in a second borehole terminated, and the third has only just begun.

In the next time interval T2in the first well fluid flow stops, the second well is just beginning, and the third well is liquid with a maximum amplitude of the P3. In the time interval from T2to T3in the first well is wet, the second hole is injected into dozirovannogo what about the volume from the maximum pressure P3to zero.

In the time interval from T3to T4in the first well is pumped metered volume of liquid up to a maximum value of P1the second ends well injection, and the third borehole fluid is delivered from the low-pressure pump 8, or by gravity, providing a filling hole in the mode of natural absorption.

Similarly, is the injection of fluid into the well in subsequent periods of time to complete processing of the rocks.

If under the terms of the technology requires the processing of more than three wells, there are additional outputs 16 valves 9 for connection through the respective hermitstory 10 to several wells 11.

The phase shift of the pulses is determined by the speed of rotation of the knee-shaft and the number of plungers pump unit, as well as the number of simultaneously treated wells. Depends on the frequency of the pulses fed into the wells in the form of individual portions of liquid are pushed alternately from each of the plunger.

Due to the exclusion from the scheme of the device of the storage tank communicated with the working cavity of the cylinder pump unit (as in the prototype), not the method and apparatus allows simultaneous and independent from each other, the flow of the liquid in several wells, and the parameters and conditions of softening and impregnation of each well shall not affect other wells, it is possible rational grouping of wells and the sequence of their processing depending on the permeability of reservoir properties of rocks.

There is no undermining of adjacent wells with the closing of cracks in the directions of least resistance, which decreases the radius of impregnation.

These advantages provide increasing performance, reducing the cost and improving the efficiency of processing of the rocks.

1. The method of discharge of fluid in the rock mass, including drilling, sealing and pumping liquids mnogoplunzhernogo pumping unit, wherein the first handle wells with fluid under pressure natural absorption until it stabilize, then the well pump fluid in a pulsed mode until hydraulic fracturing, with the pulses in each hole serves to shift the phase.

2. Device for injection of fluids in the rock mass, including mnogoplunzhernogo pump installation, podpisal for the fluid, the instrumentation and sealants wells, characterized in that it is provided with a low-pressure pump and valves, while the low-pressure pump is included in the line for the fluid, the first input of each of the distributor is connected to the output of a low pressure pump, a second input is connected to the discharge valve of the corresponding plunger pump unit, and the output connected to the input of one or more sealants wells.

3. Device for injection of fluid under item 2, characterized in that it is provided with an additional valve, the inlet of which is connected to the tank for the liquid, and its outputs are connected respectively with the inlet and outlet of a low pressure pump.

 

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