SU919998A1 - Installation for purifying flushing fluid - Google Patents

Description

Invention; refers to the purification and supply of flushing fluid in the process of drilling wells to solid, liquid and gaseous minerals.

When drilling wells, the circulation system is performed in the ground next to the derrick in the form of troughs and sumps tn.

However, the cleanliness of these systems is very low. In addition, a large amount of funds and land are spent on its device, and the gutters and tanks are frozen in winter, which requires additional efforts to combat this phenomenon.

A device for cleaning flush fluid is also known, comprising a cleaning device, pumps and process piping. The cleaning device consists of tanks with conical bases and valves for settled sludge. Inside the first. The receiver is fitted with a pipe that terminates with a conical expansion, and its upper part has a funnel connected to the same head. In the second tank for purified liquid, a pipe is installed, which is connected by a pipe with the first container and also has one.

conical expansion at the bottom. Conical expansion pipe is placed in the zone of transition of the main containers on the cone 121.

However, such an installation is characterized by insufficient purification capacity, especially for liquids with extremely high structural properties, and significant liquid losses.

10 when draining the settled sludge.

 of the invention is an increase in the efficiency of the use of the installation by reducing the loss of 15 washing liquid.

This goal is achieved by the fact that, in an installation containing a receiving tank and a tank for cleaning liquid, a pump and process piping, the receiving tank is installed coaxially in the tank for the purified liquid, equipped with a device to destroy the structure of the flushing liquid of hydrodynamic type and its side walls are made semi-permeable for 1 mi, while the installation is equipped with a filter press located between the tank for the cleaned liquid and the pump.

The drawing shows the installation of cleaning flushing, liquid, general view.

The flushing fluid purification unit consists of a sump 1, a suction pipe 2, a pump 3, an actuator 4, a pump of the discharge pipe 5, a hopper for containing reagent-flocculant with a check valve 6, a device for destroying the structure of the pumping liquid, including an external oil seal -trude 7 hollow spindle 8, cantilever nozzles 9 and hydrodynamic nozzles 10 with €: I capacity 11., capacity 12 for purified liquid, mesh filter partition 13, receiving filter 14 of the pump for supplying liquid.st in the well, filter Tr-press 15, the pipeline. 16, connecting the filter press and the tank for the purified liquid, and the frame base 17.

The washing liquid cleaning unit operates as follows.

The flushing fluid flowing out of the well and containing sludge enters the receiving sump 1, from where the suction line 2 is pumped by pump 3 along the discharge line 5 to the receiving tank 11. Flowing from hydrodynamic nozzles 10, which are directed in different directions, the fluid causes rotation a device for the destruction of the structure of the washing liquid, consisting of a hollow spindle 8, cantilever pipes 9, forming a crosspiece, connected by means of a gland-vert-lug, 7, with the discharge pipeline 5, due to jet action. Rotating, the system processes the flushing fluid throughout the volume, destroys its structure, thereby facilitating the rapid settling of the sludge, and the fluid through the semipermeable mesh partition 13 enters the tank 12 for the purified fluid. At the ends of the cantilever nipples 9, nozzles are installed that allow to fight against claying of the septum 13. For treating the liquid above and below the nozzles 10, the latter are inclined to the axis of the swivel 7 at an angle of 45-135.

Arranging the radiators. Is normal to the gland planes-ve mercury / i.e. at an angle of 90 °, the highest rotational speed is obtained. But in this case, the formation of dead zones in the receiving tank is possible, where the scrubber is not subjected to effective treatment. To eliminate this phenomenon, the emitters should be tilted to the indicated plane below the glom 45135. The frequency of rotation of the device for the destruction of the structure, which is regulated by the size of the outlet openings, the nozzles, is chosen from the condition of providing the time necessary for the deposition of cuttings from the treated volume of washing liquid. The settled sludge accumulated in the conical base of the receiving tank is supplied by pump 3 to the filter press, where: it is filtered and the filtered fluid through pipeline 16 enters the purified liquid tank 12, from where it is fed into the well through the 14 Hcicoca receiving filter. The sludge remaining in the filter press frames is removed and added to disposal or used to prepare new portions of washing liquid. Since the slurry contains a small amount of moisture (up to 30%) after processing on the filter press, it is completely transportable and workable.

The filter press can be put into operation either periodically as it accumulates in the cone of the base of the receiving tank of the sludge, or continuously, while the washing liquid is supplied to the system through the filter press in the tank for the purified washing liquid. The receiving tank is separated from the tank for purified liquid by a semi-permeable filter septum 13, which makes it impossible for the unpurified liquid to penetrate into the tank 11. All units of the installation are mounted on a single frame base 17, which makes it mobile and convenient to use. If it is necessary to carry out preventive and repair works, the installation does not need to provide for a spare sludge pump in the installation kit that connects the well and the receiving tank, which eliminates unplanned installations of the drilling process.

/ The use of the proposed installation for cleaning the washing liquid reduces the cost of drilling one meter of wells by 0.8-1.3 rubles by reducing the consumption of washing liquid, maintaining the high quality of the washing liquid, and increasing the productivity of transport costs. With the volume of implementation of this installation for cleaning flush fluid in the drilling of 100 thousand m of wells, the overall economic effect is 80-130 thousand rubles. .

Claims (2)

1.Izachev L, M Wash fluids in exploration. M ,, Nedra, 1975, p. 105-109. 2. USSR author's certificate number 649821, cl. E 21 B 21/00, 1975.