RU1835458C - Device for recording axial forces in boring pipe string - Google Patents

Abstract

Used to measure axial forces arising in a drill string. The goal is to increase the accuracy of axial force measurements. The device consists of a hollow rod 1. lower case 2, an elastic element 4, a slider / translator 6, an axis with a feather 7, a movable carriage 8, an abutment 9, a protective sleeve 10, an upper case 11, a recording mechanism of the screws. The elastic element 4 is enclosed between the lower housing 2 and the translator 6. 2.il. 00 00 eaten 00 00 Fig. 1

Description

The invention relates to the field of oil and gas well storms; in particular, to autonomous devices for measuring axial forces arising in a drill pipe string.

The purpose of the invention is to increase the accuracy of axial forces in a pipe string.

In FIG. 1 shows a device; figure 2 - section aa in fig. 1.

The device consists of a hollow rod 1, a lower housing 2, a key 3, an elastic element 4, a slider 5, a sub 6, an axis with a feather 7, a movable carriage 8, an abutment 9, a protective sleeve THAT, an upper housing 11, a recording mechanism 12 and screws. An elastic element 4 is enclosed between the lower housing 2 and the sub 6, as well as between the ledge of the rod 1 and the slider 5, which is rigidly connected to the rod. In return, the relative movement of the rod relative to the body is carried out under the action of the load along the key 3. The axial movement of the rod at the maximum load is limited by the stop 9. The axis with the pen is rigidly connected to the rod. The recording mechanism 12 is mounted on a movable carriage 8, which is able to move relative to the rod and is fastened with a screw.

The device work f as follows,.

After installing the recording mechanism 12 in the device and suspension to the rod 1 of the bottom of the drill string, lowered into the well, under the influence of its weight, the elastic element 4 is somewhat compressed and the carriage 8. moves by the amount of settlement of the elastic element, because the carriage is rigidly fixed with a screw 13 and is integral with the rod 1. In this case, the carriage will occupy the initial position corresponding to the position of the zero line for recording the axial load in the diagram of the recording mechanism. Then, the carriage is rigidly fixed with screws with a sub 6, and the screw is loosened. In this case, the carriage is fixed

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relative to sub b, rigidly connected to the housing 2 and 11. Further measurement of the axial loads associated with the descent, drilling of the well and lifting the column will cause the axis to move with the pen 7 relative to the fixed carriage, compressing the elastic element or the lower ledge of the rod 1 or slider 5. In this case, the pen on the diagram of the registering mechanism will draw the value of the axial displacement of the rod proportional to the axial forces, and the movement of the diagram by the clock mechanism will allow to record changes in axial forces in vreme- 5 no. When the loads are relieved, the elastic element will return the stem and feather to their original position. . :.

The economic effect of using the invention is achieved by increasing the accuracy of measuring axial compressive or tensile forces during well drilling and tripping by eliminating the influence of flushing fluid fluctuations on the operation of the device during research work to optimize turbine and rotary drilling, as well as assessment of the level, loads arising from the interaction of the elements of the drill string with the inner surface of the casing during its wear.

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 FORMULA AND SECTION

A device for recording axial forces in a pipe string, comprising a hollow body and a rod made respectively with an external and internal collar, an elastic element placed between the body and rod collars and a recording mechanism, which, in order to increase the accuracy of measurements, is equipped with with the possibility of axial installation relative to the rod by the carriage on which the recording mechanism is placed.

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