RU181349U1 - Borehole tubing elevator cleaner - Google Patents

Abstract

The utility model relates to means of petrochemical technology operating in a liquid medium, and can be used in chemical, oil and gas and other industries to improve the processes of obtaining homogeneous mixtures. The downhole cleaner includes links interconnected by quick-release rings for flexibility, including hardened impellers with pointed edges and teeth located around the perimeter, bushings worn on the axles, a quick-disconnect tip and a flexible parachute that provide an increased inter-cleaning period, high efficiency of grinding and cleaning, as well as stabilization of the position of the cleaner and simplification of extraction from the column.

Description

The utility model relates to means of petrochemical technology operating in a liquid medium, and can be used in chemical, oil and gas and other industries to improve the processes of obtaining homogeneous mixtures.

From patent No. 158201 RU there is known a downhole slit filter, characterized in that it comprises a casing in the form of a pipe made of impermeable material with slit openings directed along the generatrix, while the length of the openings is at least three times the width, a rod is installed along the housing axis on which the impellers are mounted rotatably and move along the rod, separated by springs, around the filter housing, coaxially with it, a casing is installed in the form of a pipe with a length of transverse slotted openings made on its generatrix, equal to half the circumference of the casing, staggered along its entire height, the casing and the housing are fastened at the ends by bolts located perpendicular to the longitudinal axis of the slotted filter. Threaded connections are made at the ends of the slotted filter housing to enable the formation of a multi-sectional slotted filter using connecting sleeves. Slotted holes on the casing are arranged with a step equal to four transverse dimensions of the hole.

From patent No. 2453682 RU, a well filter is known comprising a perforated frame, polymer disks placed on the frame forming slots between themselves, characterized in that the disks are made of reinforced adhesive tape, on the adhesive side of which a monolayer of dispersed particles is fixed. Disks are made of double-sided tape. Silica sand is used as dispersed particles. The size of the dispersed particles is 50-1000 microns.

From US Pat. No. 2,166,197, a rotary chopper is known having an impeller with pointed and / or serrated edges.

The closest analogue is the dispersant known from patent No. 2301700 RU, comprising impellers and a spring, characterized in that additional impellers, a stud with clamps and bushings mounted on the stud between the impellers are introduced to provide dynamic interaction between the edges of the blades of adjacent impellers, the edges of the blades are pointed, moreover, two groups of impellers are made larger and are installed at the ends of the studs near the clamps, two other groups of impellers are made smaller and installed between by ups of larger impellers, a spring is installed between groups of smaller impellers, larger impellers and smaller impellers are rotatable in opposite directions, larger impellers are made with a diameter close to the diameter of the oil pipeline. The disadvantage is the complexity of the design, which entails an increased likelihood of jamming of the dispersant in the pipe, as well as the complexity of the connector design.

The objective of the utility model is to increase the inter-treatment period of the tubing string, to increase the homogenization efficiency, to simplify the removal of the device from the string.

Solution: the downhole cleaner consists of links interconnected by rings with the possibility of rotation of the rings. Due to this, design flexibility and efficiency of changing the number of links are achieved. Each of the links, in turn, includes a set of impellers of various diameters worn around the shaft and rotatable around the shaft and separated by bushings, the edges of the blades of which are sharpened by an angle of 30 to 60 degrees both inside and outside. Also, at least one of the types of impellers has teeth on the outer edge with an angle of 30 to 60 degrees, and they themselves are processed with a temperature to an HRC value of 56 to 60. Due to this, high grinding efficiency is achieved, and the uniformity of the mixture is increased . A flexible parachute with a diameter of 2-4 mm less than the inner diameter of the pipe being cleaned and having radial slots is installed on one end of the cleaner. Due to this, stabilization of the position of the cleaner is achieved, as well as an increase in the efficiency of pipe cleaning. In addition, at the top of the first link, a fungal tip of the quick disconnect connection is fixed. This reduces the time of the lowering-raising operation of the cleaner.

Utility Model Implementation

The cleaner consists of links interconnected by rings with the possibility of rotation of the rings, which allows the cleaner system to be flexible. The rings have a lock, which allows you to quickly add or replace links. Depending on the presence of foreign particles, the number of links is regulated (the more harmful inclusions, the more links).

A flexible parachute is fixed at one end of the cleaner with a diameter of 2-4 mm less than the inner diameter of the pipe being cleaned, which contributes to better cleaning of the tubing. A parachute scrapes adhering foreign particles from the walls of the tubing pipes, keeps the purifier system from abrupt lowering in the pipe while the pump is turned off, which makes it possible to thoroughly clean the internal cavity of the pipes, and helps the purifier system rise to the stop at low flow pressure.

Each of the links, in turn, includes a set of impellers of various diameters worn on the shaft and separated by bushes, the edges of the blades of which are sharpened at an angle of 30 to 60 degrees both inside and outside. The impellers also have teeth on the outer edge with an angle of 30 to 60 degrees, and they themselves are treated with a temperature up to an HRC value of 56 to 60. The impeller thickness is up to 3 mm.

The design of the impellers and the functionality of the flexible parachute significantly increase the uniformity of the mixture. Several types of different impeller diameters in the links contribute to the most efficient grinding. The diameter of the largest impeller provides a clearance in the pipe of 0.5 to 1.5 mm per side. The remaining impellers of smaller diameters provide grinding of inclusions in the middle and small layers of the flow.

The seating of the impellers on the shaft and the inner diameter of the bushings are selected in such a way as to eliminate jamming and ensure free rotation on the shaft - the gap is 0.2 mm per side. The clearance between the impellers and the bushings is 0.2 to 1.5 mm.

At the top of the first (upper) link, a tip is fixed, which has the form of a fungus and is part of a quick disconnect connection, which makes it possible to raise the cleaner from the well. Thus, the process of removing the purifier is simplified and cheapened.

The principle of the purifier: the purifier is placed in the oil pipeline and start the oil and gas stream. Using a flexible parachute 10, the device rises to the reinforcement 11 even at low flow pressure, which causes the impellers to rotate. The impellers 7, 8, 9 have different sizes, different directions of rotation and different sharpening. Since all the blades have sharp edges both inside and around the perimeter of the impellers, and the impellers 7 and 9 also have teeth on sharp edges around the perimeter, during rotation, foreign particles that are in the stream are crushed more efficiently. When the pump is turned off, thanks to a flexible parachute, the purifier system slowly descends along the channel, scraping adhered foreign particles from the walls of the tubing pipes. At overpressure, parachute 10 bends, making room for flow. The cleaner is removed from the well by turning off the pump and lowering the hooking device into the column, which clings to the tip 11 and the cleaner is pulled.

Thus, the utility model makes it possible to ensure high efficiency of homogenization of the oil and gas flow, to simplify the extraction of the downhole tubing elevator cleaner, to clean the internal walls of the tubing from adhered foreign particles, which helps to maintain the operability of pumps and metering mechanisms, and the inter-cleaning period is increased from 5 to 10 times.

Description of the drawings.

In FIG. 1, FIG. 2, FIG. 3 shows the downhole cleaner of the tubing assembly lift. Here the oil and gas pipeline housing 1, the shaft of the cleaner link 2, the cotter pin for fixing the set of impellers on the shaft 3, the restrictive washer for the bushings 4, the sleeve 5, the ring of connection of the links 6, the impellers of different sizes, different directions of rotation and different sharpenings 7.8.9, flexible parachute 10; the tip of the quick coupler 11, the fittings of the tubing 12.

Claims (1)

The downhole cleaner of the tubing lift, including detachable links, on the shafts of which are rotatably mounted around the impeller shaft of various diameters with bushings between them, characterized in that the links are interconnected by rings to rotate the rings, the edges of the impeller blades are pointed at an angle from 30 to 60º both inside and outside, and at least one of the types of impellers has teeth on the outer edge with an angle of 30 to 60º, and the impellers themselves are treated with a temperature up to HRC о 56 to 60, wherein at one end of the flexible wiper mounted parachute diameter smaller than 2-4 mm internal diameter pipe to be cleaned, and having a radial slot at the apex of the first link fixed gribkoobrazny tip quick coupling.

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