SU1332009A1 - Measuring device for geophysical deep-well instrument - Google Patents

Abstract

The invention relates to the field of geophysical research. The purpose of the invention is to expand the functionality

Description

capabilities of the device by assessing changes in the density of flushing fluid in the wellbore and revealing reservoir manifestations. For this purpose, in the housing 2, a closed cavity 8 is filled, filled with oil. In the cavity 8, a transducer is installed in the form of a strain gauge pressure sensor 9 and a stem 10 on which a slider 12, connected by connecting rods 13 with measuring levers 3 having slots, acts through a spring 11. Located in the housing 2 revealing the levers 3, the node is made in the form of a spring-loaded spring 5 of the rod 4 with a radially reinforced

one

The invention relates to the field of well logging, in particular to lever measurement devices used in geophysical instruments.

The purpose of the invention is to enhance the functionality of the instrument by assessing the change in density of the drilling fluid along the wellbore and detecting formation formations.

FIG. shows the measuring device of the downhole geophysical instrument; figure 2 - view And figure 1

The device is lowered into the well on a three-core cable 1 and comprises a housing 2 to which the arms 3 are pivotally attached.

In the housing 2 there is an opening device and a mechanism for converting the angular displacement of the measuring cells into an electrical SRGG-cash.

The opening knot consists of a rod 4, a spring-loaded spring

5, and radially located screws

6, for example, with a tsipindric head, which fix the measuring levers in the folded state through special grooves 7, designed to fit the shape of the head of screws 6.

The converter is made in a closed oil cavity 8, in which a strain gauge type pressure sensor 9 and a rod 10 are mounted on mounted screws. When the device reaches the bottom under the action of its own weight, it removes the spring 5, the screws of the rod 4 rise in a groove until it expands, and release the levers 3, which is fixed by the sensor 9. When the levers 3 are raised, their position changes according to the profile of the borehole wall. Through slider 12 they compress PRS: Inu II, which through the stem Yu creates an overpressure in cavity 8, perceived by sensor 9 and converted into an electrical signal. This device has a simplified kinematic scheme and can operate at temperatures up to 250, 2 sludge.

five

The second through the spring 1 acts a slider 12 connected by connecting rods 13 to the measuring levers.

The device works as follows.

During the descent of the device into the well, the levers 3 are in the folded state. The pressure sensor 9 records the buildup of hydrostatic pressure over the depth proportional to the density of the solution. If the well filling solution is homogeneous in terms of the potential, then the pressure builds up linearly. If the linearity is broken, this indicates a change in the specific gravity of the solution due to its separation, partial replacement with a solution of a different density or dilution for various reservoir manifestations. . As soon as the device reaches the squall, under its own weight, it compresses the spring 5, the screws of the rod 4 rise in slot 7 to expand and release the measuring levers, which is fixed by the pressure sensor. When lifting the levers 3, the position relative to the borehole wall changes according to its profile , through the movable slider I2, the rod 1 is compressed or weakened, which through the rod 10 creates an overpressure in the closed oil cavity 8, the pressure sensor senses the pressure change and converts it

0

five

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In accordance with the electrical signal, which is recorded on the surface. The pressure sensor has small dimensions: a diameter of 30 mm, a length of 80- 90 mm, is commercially available, the measurement error does not exceed ± 0.5%, operates at a temperature of up to 250 C.

Expansion of the functionality of the device is achieved by including a strain gauge pressure sensor in the converter, and the use of a simplified kinematic scheme of the measuring device by using a connection to measure the quality of the solution and the formation formation.

When filling the internal cavity of the sensor with non-conductive liquid and equalizing the pressure in it, the device can operate at virtually any pressure (depth).

Claims (1)

10 claims The measuring device of the borehole geophysical instrument, containing the body, is hingedly connected with levers through a spring-loaded half- 15 measuring levers, The zoon to rod, acting on the pressure sensor, allows to increase the reliability and accuracy of measurements of the borehole diameter. The measuring device has a simplified kinematic scheme and is able to work in wells with temperatures up to 250 ° C, there is no unsurely compensating rubber. 4) tool levers and a transducer, characterized in that, in order to expand the functional capabilities of the device by evaluating 20 the change in density of the washing liquid along the wellbore and detecting formation formations, it is equipped with a spring-loaded slider made in the body of a closed polo element. Significantly reduced by the diameter filled with oil, the transducer and the weight of the device, the number of parts requiring manufacturing according to a high accuracy class is reduced, the possibility of separating actuating and transforming elements 30 is constructively eliminated by moving electrical contacts. During tripping, additional information about the density distribution of the mud 35 over the depth of the well appears, The sensor is made in the form of a strain gauge pressure sensor and a stem connected to a spring-loaded slide mounted in the housing of the housing, the latter through connecting rods connected to the measuring levers, and the opening node is made in the form of a spring-loaded rod with radially mounted screws fixed on it, and in the measuring levers grooves are made. eleven Editor N. Tupitsa FIG. 2 Compiled by V.Petrova Tehred A.Kravchuk Order 3779/29 Circulation 532 Subscription VNIIPI USSR State Committee for inventions and discoveries P3035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 assessment of the quality of the solution and the detection of formations. When the inner cavity of the sensor is filled with non-conductive liquid and the pressure leveling in it, the device can operate at virtually any pressure (depth). Invention Formula Measuring device of a borehole geophysical instrument, comprising a housing, articulated with it 4) tool levers and a converter, characterized in that, in order to expand the functional capabilities of the device by assessing changes in the density of the washing fluid through the wellbore and detecting formations, it is equipped with a spring-loaded slider made in the housing with a closed cavity filled oil The sensor is made in the form of a strain gauge pressure sensor and a rod mounted in the housing cavity and connected to a spring-loaded slider, the latter through connecting rods connected to the measuring levers, and the expanding node is made in the form of a spring-loaded rod with screws fixed on it measuring levers are made grooves. Proofreader L. Patay