RU29332U1 - Mobile cement slurry plant - Google Patents

Description

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2002126430

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 MOBILE PLANT FOR PREPARING CEMENT MORTAR The utility model relates to the field of cementing in boreholes and, in particular, is a mobile unit for the preparation of cement slurry in a measuring unit and transporting dry cement in a self-loading and self-loading bunker during cement work drilling oil and gas wells. In current domestic and foreign practice, cement mortar is prepared in wells using mixing machines with a hopper, usually having a capacity of tons. In domestic practice, cement mixers 2CMN-20, SM-10, US6-30, etc. are used for this purpose (see, for example, the book "Handbook for the overhaul of oil and gas wells, authors A.S. Yashin, S.V. Avilov et al., ed." Nedra, Moscow, 1973, pp. 172-174). For the prototype of the claimed utility model, the SM-4M mixing plant can be used for transporting dry grouting materials and mechanized preparation of grouting grout for overhaul of wells (see the book "Catalog of oil equipment, automation equipment, gas and special materials, volume П, authors V.L. Arkhangelsky, E.N. Avakon, E.N. Bukhalenko et al., pp. 154-157). This installation consists of a vehicle (truck), on the mounting frame of which are mounted: a hopper, a screw conveyor with a drive, an inkjet type hydraulic mixing device with interchangeable fittings, and instrumentation. The working screw conveyor is used to supply cement from the hopper through the Bopoi Ky intake to the hydraulic mixing devices v it is driven by the traction: about the engine through the box} of power 1; installed and;

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Automotive transfer case, cardan shaft, gearbox and safety clutch. On the rear wall of the hopper, a pneumatic EGG-Vibrator is mounted, powered by an uncoupling valve of the car's pneumatic system. The disadvantage of the prototype is that the supply of cement by a screw conveyor from the hopper to the hydraulic mixing device does not immediately allow you to reach the desired parameters of the cement mortar in density and viscosity. The unit immediately prepares and delivers the cement slurry into the well, due to which there is a loss of mortar when entering the mode. It is necessary to constantly monitor the parameters of the solution entering the well.

The claimed utility model is based on the task of creating such a mobile installation for the preparation of cement mortar, which would make it possible to immediately reach the desired parameters of the cement mortar in terms of density and viscosity, thereby avoiding the loss of mortar when entering the mode, and avoiding constant monitoring of the mortar parameters during injection him into the well.

The solution to this problem is provided by the fact that a mobile installation for the preparation of cement mortar includes a vehicle, for example, a chassis with a mounting frame, on which a dry cement hopper, a mixer, a device for supplying dry cement from a hopper to a mixer, drive mechanisms from a motor chassis traction motor are mounted and control. 11 measuring instruments. The hopper is mounted on the mounting frame with an inclination towards the mixer and is equipped with an aerated bottom mounted inside its lower part, connected to the air supply pipe from the discharge pipe of the vacuum pump-compressor, the suction pipe of which is connected to the upper part of the hopper cavity. In this case, the lower part of the cavity of the hopper is communicated through a cement pipeline and a cyclone-unloader with cavities mounted on the rear of the mounting frame of the measuring tanks, in each of which a stirrer with a separate drive is located. At the same time, a pressure fitting connected to the discharge pipe is introduced into the cement pipeline below the unloading cyclone. In addition, the installation is equipped with a pneumatic device for loading dry cement into an oskker from eMKOCTii for storage in the form of immersed in

the indicated capacity of the vacuum tip, the cavity of which is communicated with the suction side of the vacuum pump-compressor through the cavity of the hopper.

Such a mobile installation for the preparation of cement mortar allows you to combine a hopper with dry cement, a loading and unloading system, a cement mortar mixer and a set of devices in one unit, allowing you to immediately prepare the required amount of cement with the required parameters, thereby eliminating the loss of mortar when reaching mode and the need for constant monitoring of the parameters of the solution when injecting it into the well.

In the future, the claimed utility model is illustrated by an example of its implementation, schematically depicted in the accompanying drawings, in which: FIG. 1 - General view of the inventive mobile installation for cooking

cement mortar (side view); FIG. 2 is the same as FIG. 1 (plan view); FIG. 3 is a reference diagram of the apparatus shown in FIG. 1; FIG. 4 - schematic pneumatic diagram of the installation shown

in FIG. 1; FIG. 5 is a schematic hydraulic diagram of the installation shown

in FIG. 1

A mobile installation for the preparation of cement mortar (Fig. 1) —contains a vehicle 1 (for example, the chassis of a KRAZ-65101 truck) with a mounting frame 2. A two-shaft power take-off box 4 with a top mounted on the transfer case 3 (Fig. 3) of the car chassis selection shaft 5. All other equipment of the installation is mounted on the mounting frame 2 (Fig. 1). A two-shaft transfer gearbox 7 is connected to the power take-off box 4 by means of a cardan shaft 6, having an output end of the lower shaft 8 and two output ends of the upper shaft 9. The output end of the lower shaft 8 (Fig. 3) is equipped with a gear coupling 10 with manual engagement for pump drive And feeding hydraulic motors 12 drive mixers 13 (Fig. 2 and 3) and outriggers 57 (Fig. 1).

-; -v.,. n .. ..:; -: -; :: -U. C) One OUTPUT end of the upper shaft 9 is equipped with a gear coupling 14 for turning on and off through a temporary timing gear 15 of the vacuum pump-compressor 16. The other end of the upper shaft 9 is equipped with a gear coupling 17 for turning on and off through the V-belt transmission 18 of the water supply pump 19. The vacuum pump 16 and the water supply pump 19 are located on the mounting frame 2 on both sides of the gear 7 (Fig. 2). A hopper 20 for dry cement is placed on the mounting frame, mounted obliquely to the side of the mixers. Preferably, the angle of the hopper is 8 °. The hopper 20 is equipped in the lower part with an air duct 21 (Fig. 4), into which air from the discharge pipe 24 communicated through the check valve 25, the control valve 26 and the oil and moisture separator filter 27 with the discharge pipe 28 of the vacuum pump can be supplied from the bottom through the pipe 22 through the shut-off valve 23 -compressor 16, followed by a tap 29 into the atmosphere, equipped with a shut-off valve 30 (Fig. 4). The adjusting wengil 26 can completely crush the discharge pipe 24 during operation of the dry cement supply system from the storage tank (on the warehouse) 32 to the hopper 20. In general, this system, indicated by the number 31, will be described below (Fig. 4). One end of the discharge pipe 24, having a valve 33, is equipped with a pressure fitting 34 inserted into the cement pipe 35, connected through a shut-off valve 36 with a hopper 20, and on top with a discharge cyclone 37, equipped with an air filter 38 in the upper part and in the lower part pipe 39, introduced into the measuring tank 40 (Fig. 1,2,4), in which the calculated amount of water can be poured for the preparation of cement mortar with the necessary parameters. On the 3 back part of the mounting frame 2 there are two measured tanks 40 located behind the hopper 20 symmetrically with respect to the longitudinal axis of the vehicle 1. A mixer 13 with a drive hydraulic motor 12 is placed in each measuring tank 40 (Figs. 1,2,3,4).

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the upper part of the hopper 20 with the cavity of the latter. At the same time, the end of the air line is equipped with a bag filter 46. Between the air filter 42, a pipe 47 with a shut-off valve 48 is introduced into the air line and is introduced into the atmosphere. The hopper 20 is equipped with a tap 64 with a shut-off valve 49, leaving the atmosphere, a sensor 50 of the maximum level of dry cement in the hopper, as well as a manovacuum meter with a separator 51.

The system for supplying dry cement from the tank 32 to the hopper 20 includes a vacuum tip 52, which through the control valve 53 is connected to the atmosphere, and through the cement pipe 54 with a check valve 55 with the upper cavity of the hopper 20. The specified vacuum tip 52 for introducing the hopper with dry cement is introduced into capacity 32.

Presented in FIG. 4, a basic alphabetic installation diagram includes an axial piston pump 56, hydraulic motors

axial-piston 12 drive of the agitators 13, hydraulic outriggers 57, sectional control valve 58, oil tank 59, drain oil filter 60 (Fig. 1,2,5).

In the metering tanks 40, a cement mortar density meter and an indicator of the volume of injected water (not shown) are installed.

The water communications system provides a system of valves that allows water to be taken from an external source and pumped into any metering tank or both at once, water can be taken from one tank and pumped into another.

The installation is equipped with a dosed cement delivery system in measuring tanks 40, the basis of which includes weighing; its hopper device 61 (Fig. 1).

The operator’s position is located between the hopper 20 and the measuring tanks 40 on the flat; adka 62 (Fig. 2), raised above the floor of the mounting frame 2 per mm. It is equipped with a remote control for engraving 63, including pneumatic system controls, hydraulic agitators, indicating instruments for measuring the mass of cement, density of cement mortar, oil pressure in the main system. lu iT-n. :: ..-.,; ,, .- / .. ,, .. -,, ..-.-. - :-( - - -.... In the mode of loading dry cement into the hopper 20 (Fig. 4) from the tank 32 (for example, in a warehouse), the smart tip 52 is lowered into the latter, then the vacuum pump-compressor 16 is turned on at rasping taps 43 and 30 and closed 26 and 48. When the vacuum pump compressor 16 is in the suction mode from the hopper 20, a vacuum occurs in the latter, and then the valve 53 is opened, communicating the cavity of the vacuum tip 52 with the atmosphere, due to air entering the vacuum tip at atmospheric pressure and vacuum in the hopper 20 is moving of dry cement through the cement drive 54 upward from the tank 32 through the non-return valve 55 to the hopper 20. The limit level of dry cement in the hopper 20 is monitored by the sensor 50. After filling the hopper 20 with dry cement, the installation arrives at the place of work (to the well) and then works in the cement preparation mode solution with the given parameters .. From an external source (not shown in FIG.) to the measuring tanks 32 with a water supply pump 19 (FIG. 2) the calculated amount of water is poured and the mixers 13 are turned on (Fig. 4). The water-feeding pump 19 is driven through a V-belt drive 18, an engagement clutch 17, a transfer gear 7, a transfer KOpo6iQ 3 (Fig. 3) from a motor chassis (not shown). Mixers 13 (Fig. 4) are conducted from hydraulic motors 12 (Fig. 3,5), controlled from the control panel 63 (Fig. 2). For this, air from the discharge side of the vacuum pump-compressor 16 is supplied with closed taps 43 and 30 and from taps 48, 26, 23 and 33 into the aeroflot 21 (Fig. 4), in which the cement powder material is aerated, i.e. it is poured by capillary distributed air, acquires fluidity close to fluidity, and due to the inclination of the hopper 20, it flows out of it through an open valve 36 and cement pipe 35 to a cyclone-unloader 37. At the same time, cement pipe 35 passes through a pressure fitting 34 through a pipe 24 with open 1 fan 33 air. From the cyclone unloader 37, dry cement enters through the pipe 39 into the measured tanks 40, where it is mixed with mixers 13, forming the required mix of cement mortar with the necessary parameters. Air from the cyclone separator 37 is vented to the atmosphere through an air filter 38.

--Dro5.)

At the same time, the yield of cement mortar formed in the measured tanks 40 is fixed at the desired parameters (closeness and viscosity). From the measuring tanks 40, the required portion of the solution in a known manner is supplied to the consumer (in the well).

An advantage of the inventive mobile installation is that it contains in one unit a hopper with dry cement with a loading-unloading system, a cement mortar mixer and a set of devices, which allows you to immediately prepare the required amount of cement mortar with the required parameters. Since the total amount of cement mortar to be pumped is prepared in measured tanks with the required parameters, mortar losses are excluded when entering the mode. There is no need to constantly monitor the parameters of the solution when injected into the well.

Authors: V.N. Martshov

Yu.A. Zilberberg A.Yu. Nikolaev

Claims (2)

1. A mobile unit for the preparation of cement mortar, including a vehicle, for example, a chassis with a mounting frame, on which a dry cement hopper, a mixer, a device for supplying dry cement from a hopper to a mixer, a drive mechanism from the vehicle’s traction motor, and control devices, characterized in that the hopper is mounted on the mounting frame with an inclination towards the mixer and is equipped with an aerated bottom installed in its lower part, in communication with the hearth pipeline and air from the discharge pipe of the vacuum pump-compressor, the suction pipe of which is in communication with the upper part of the hopper cavity, while the lower part of the hopper cavity is communicated through a cement pipe and a cyclone-unloader with cavities mounted on the rear of the mounting frame of the measuring tanks, in each of which there is a mixer with a separate drive, and a pressure fitting connected to the discharge pipe is introduced into the cement pipeline below the unloading cyclone. 2. Mobile installation for the preparation of cement mortar according to claim 1, characterized in that it is equipped with a pneumatic device for loading dry cement into the hopper from the storage tank, made in the form of a vacuum tip immersed in the specified capacity, the cavity of which is communicated with the suction side of the vacuum pump compressor through the cavity of the hopper.