RU35369U1 - Device for measuring fluid level in a well - Google Patents

Description

2603112317

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MPK7E21V47 / 04

DEVICE FOR MEASURING A LIQUID LEVEL IN A WELL

The utility model relates to the field of measuring the level of fluid in wells and can be used in the oil and gas industry.

A device for measuring the level of fluid in a well is known, comprising a drum, a measuring cable and a tip with a sound-forming surface (Reference Manual of a Hydrogeologist, edited by Maksimov V.M., L .: Nedra, 1967 v.2, p.250). Moreover, the sound-forming surface of the tip is made in the form of a hemispherical cavity, which is located at its front end and generates an audio signal (burst) when the tip reaches the surface of the liquid.

The disadvantage of this device is the lack of versatility and inconvenience in operation, which is expressed in the inability to determine the level of two different fluids (dielectric and conductive) in the well, as well as the insufficient volume of the surge when the tip reaches the surface of the fluid.

The device for measuring the liquid level in the well, which we adopted as a prototype, contains a drum, a galvanometer, a power source, a graduated measuring cable, a ground contact, and a tip with a sound-forming surface located on its front end and an electrode mounted in it (Reference book of the hydrogeologist, ed. Maksimova V.M., L .: Nedra, 1967 vol. 2, p. 253). Moreover, the sound-forming surface is made in the form of a flat front end of the tip, and the electrode is mounted in the back of the tip.

The disadvantage of this device is the inability to determine the level of dielectric fluid in wells with a depth of more than 20 m due to the insufficient volume of the sound signal (burst) created by it. The second disadvantage of the device is the need for

additional calculations when using it, due to the fact that the levels of liquids are measured from different reference points: the level of dielectric fluid is from the front plane of the tip, and the level of the conductive fluid is from the electrode in the rear surface of the tip.

The utility model is based on the task: to create a device for measuring the levels of dielectric and conductive fluids in a well, the design of which allows it to determine the level of dielectric fluid in wells with a depth of more than 20 m.

The problem is solved in that in the known device for measuring the liquid level in a well containing a drum, a galvanometer, a power source, a graduated measuring cable, a ground contact and a tip with a sound-forming surface located on its front end and an electrode mounted in it, in accordance with a useful With the model, the sound-forming surface is made in the form of an open bell-shaped cavity, inside of which an electrode is placed, while the tip of the electrode is deepened relative to the front CAR tip.

The technical result is expressed in the ability to determine the level of dielectric and conductive fluids in wells with a depth of more than 20 m with one device. The result is achieved, firstly, by performing an open bell-shaped cavity in the lower part of the body, which is a sound-forming surface and creates a loud sound signal (burst) when immersed tip into the dielectric fluid by an amount equal to the distance from the tip of the electrode to the front end of the tip. Secondly, due to the placement in the middle of the open bell-shaped cavity of the electrode, the tip of which closes the electric circuit upon reaching the conductive fluid, the galvanometer signals the passage of current, which allows you to determine the level of the conductive fluid.

measuring graduated cable, without additional calculations. This is achieved by the fact that the tip of the electrode, which is recessed relative to the front end of the tip, is selected as a common zero reference point for measuring both levels of fluids in the well.

In FIG. A device for measuring the level of a liquid in a well and placement of dielectric (oil products) and electrically conductive (water) liquids in a well is shown.

The device consists of a drum 1, with a graduated measuring cable 2 wound around it, a galvanometer 3, and a power source 4. A tip 5 is fixed at the end of the cable 2. At its front there is a sound-forming surface in the form of an open bell-shaped cavity 6, which, due to its shape, provides creating a loud sound signal (burst) when immersing the tip 5 in dielectric fluid. It has been experimentally proved that a burst is created when the tip 5 is immersed in a dielectric liquid to a depth of 1.5-2 mm. In the middle of the open kolokoobraznoy cavity 6 of the tip 5 is placed an electrode 7 made in the form of a pointed rod. The tip of the electrode 7 is 2 mm deepened relative to the front end of the tip 5, this ensures the establishment of one common zero reference point for measuring both levels of fluids in the well. The ground contact 8 is connected to the casing 9 of the investigated well.

A device for measuring the level of fluid in the well works as follows. Ground the device using pin 8 on the casing 9 of the well. Unwinding the drum 1 with a graduated insulated cable 2, lower the tip 5 into the well. Due to the presence of an open bell-shaped cavity 6, immersion of the tip 5 in a dielectric liquid (oil products) by 2 mm creates a loud sound - a splash. Determine the depth from the surface of the dielectric fluid to the wellhead using a graduated insulated cable 2. Continue to lower the tip 5 into the well. Node is a dielectric fluid under pressure.

Once in the open bell-shaped cavity 6 of the tip 5, it is pushed into the upper part of the bell-shaped cavity 6, opening the tip of the electrode 7. When the electrode 7 reaches the level of the conductive liquid (water), the electric circuit closes, and the galvanometer 3 signals the passage of electric current. The depth is determined from the level of the electrically conductive fluid to the wellhead using a graduated cable 2. With a further descent of the tip 5, it reaches the bottom of the well, which is determined by the weakening of the cable tension. Determine the total depth of the well from the bottom to the mouth using a graduated cable 2. By proxy of the applicant, a patent attorney (.С. Stogniy register. No. 65 (UA)

Claims (1)

A device for measuring the liquid level in a well, comprising a drum, a galvanometer, a power source, a graduated cable, a grounding terminal and a tip with a sound-forming surface located on its front end and an electrode mounted in it, characterized in that the sound-forming surface is made in the form of an open bell-shaped cavity inside which the electrode is placed, while the tip of the electrode is recessed relative to the front end of the tip.