Tool for testing static torque sensor by simulating deep sea working condition

Abstract

The utility model discloses a tool for testing a static torque sensor by simulating a deep sea working condition, which comprises a shell, an input connecting piece, a plurality of square keys, an output connecting piece and a torque multiplier, and an inner cavity of the shell is used for accommodating the static torque sensor to be tested; the input connecting piece is connected with the upper part of the shell; a plurality of square grooves are formed in the input connecting piece; a plurality of slots are formed in the upper part of the shell, and adjusting screws are arranged in the slots; the output connecting piece is connected with the lower part of the shell; the output connecting piece is provided with a workbench connecting part, and the output connecting piece is fixedly connected with the workbench through the workbench connecting part. The output end of the torque multiplier is connected with the input connecting piece. According to the utility model, the working condition of the static torque sensor in the deep-sea high-pressure environment can be simulated, so that the torque measurement value of the static torque sensor in the deep-sea high-pressure environment can be obtained.

Description

Technical Field

[0001] The utility model relates to an accessory for marine petroleum engineering equipment, in particular to a tool for simulating deep-sea working conditions to test a static torque sensor. Background Art

[0002] The exploitation of oil and gas fields is undergoing a huge change from land to shallow sea and then to deep sea. Therefore, the underwater production systems used to extract oil and natural gas at sea are gradually shifting from shallow water to deep water and ultra-deep water areas.

[0003] The existing underwater production system consists of underwater equipment and submarine cables such as underwater wellheads, underwater Christmas trees, underwater manifolds, and underwater control systems, and is widely used in the development of deepwater oil and gas fields and marginal oil and gas fields. Underwater operations with a water depth of more than 300m require the use of ROV (underwater robot). In the 2021 Harbin Engineering University Master of Engineering thesis "Research on the Scheme and Driving Method of Underwater ROV Torsion Tool", published by Wanfang Database on October 1, 2022, a structural diagram of an underwater production system was disclosed. Among them, the ROV's underwater operating capability depends on its own manipulator and auxiliary operating tools. Since the functions of the ROV's own manipulator are very limited, a large amount of work requires auxiliary operating tools to complete.

[0004] Chinese utility model patent document CN112171585A discloses a torque tool for ROV with switchable torque gears, which has the following functions: (1) to cooperate with the underwater ROV manipulator to rotate the rotary docking interface; (2) the hydraulic drive mechanism can switch between two working gears to provide a wider range of torque, so that the torque tool can provide all the design torques required by Class I-IV levels in the ISO13628-8 interface standard and display the torque gear in operation externally; (3) the rotary docking interface can be locked during operation to ensure stable connection during operation.

[0005] In order to achieve remote operation, the ROV torque tool needs to be equipped with a static torque sensor. The static torque sensor monitors the torque value of the torque tool in real time and transmits it to the control room on the surface to guide the operator to perform correct operation.

[0006] However, existing static torque sensors lack specialized sensors for deep-sea applications (i.e., waters below 300 meters below sea level), requiring only sensors designed for atmospheric pressure. It is unknown whether atmospheric pressure sensors will perform the same in the high-pressure deep-sea environment as they do in atmospheric pressure. Utility Model Content

[0007] The technical problem to be solved by the utility model is to provide a tool for simulating deep-sea working conditions to test a static torque sensor, which can test the performance of the static torque sensor in a deep-sea high-pressure environment.

[0008] To solve the above technical problems, the technical solution of the tool for testing static torque sensors in simulated deep-sea working conditions of the present invention is as follows:

[0009] The invention comprises a shell 5, an input connector 2, a plurality of square keys 12, an output connector 10 and a torque multiplier 1. The inner cavity of the shell 5 is used to accommodate the static torque sensor 7 to be measured; one end of the oil pipe 6 is connected to the inner cavity of the shell 5, and the other end of the oil pipe 6 is connected to the compensator; one end of the underwater connector 11 extends into the inner cavity of the shell 5 and is connected to the sensor 7, and the other end of the underwater connector 11 is connected to an external cable and a signal receiver; the input connector 2 is connected to the upper part of the shell 5; the input connector 2 is provided with an exhaust hole, and a vent plug 13 is provided in the exhaust hole; the input connector 2 is provided with an exhaust hole. There are multiple square grooves; multiple slots are formed on the upper part of the shell 5, and the slots are provided with adjustment screws 4; multiple square keys 12 match the square grooves of the input connector 2 and the slots of the shell 5; when the square keys 12 extend into the square grooves of the input connector 2 and the slots of the shell 5, turning the adjustment screws 4 can make their ends contact the sides of the square keys 12; the output connector 10 is connected to the lower part of the shell 5; the output connector 10 is provided with a workbench connection part, and the output connector 10 is fixedly connected to the workbench through the workbench connection part; the output end of the torque multiplier 1 is connected to the input connector 2.

[0010] In another embodiment, two gap adjustment blocks are respectively provided on both sides of the upper end of the housing 5 , and the slot is formed between the two gap adjustment blocks; the distance between the two gap adjustment blocks matches the thickness of the square key 12 .

[0011] In another embodiment, one or both of the two gap adjustment blocks are provided with a threaded hole, and the adjusting screw 4 is passed through the threaded hole.

[0012] In another embodiment, the adjusting screw 4 extends in the transverse direction.

[0013] In another embodiment, the upper flange of the static torque sensor 7 to be measured is fixedly connected to the input connector 2 by a set of screws 8 .

[0014] In another embodiment, the lower flange of the static torque sensor 7 to be measured is fixedly connected to the output connector 10 by another set of screws 8 .

[0015] In another embodiment, the input connector 2 cooperates with the inner cylindrical surface of the upper portion of the housing 5 through its outer cylindrical surface.

[0016] In another embodiment, the output connector 10 is fixedly connected to the lower portion of the housing 5 by bolts.

[0017] In another embodiment, an upper sealing ring 3 is provided between the input connector 2 and the housing 5 .

[0018] In another embodiment, a lower sealing ring 9 is provided between the output connector 10 and the housing 5 .

[0019] The technical effects that can be achieved by the utility model are:

[0020] This utility model can simulate the operating conditions of a static torque sensor in a deep-sea high-pressure environment, thereby obtaining the torque measurement value of the static torque sensor in this deep-sea high-pressure environment. By comparing the torque measurement value of the static torque sensor in this deep-sea high-pressure environment with the torque measurement value collected on the ground, the performance and change pattern of the static torque sensor in deep-water environment can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Those skilled in the art will appreciate that the following description is merely illustrative of the principles of the present invention, which can be applied in a variety of ways to achieve many different alternative embodiments. These descriptions are intended only to illustrate the general principles of the teachings of the present invention and are not intended to limit the concepts of the present invention disclosed herein.

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present invention and, together with the general description above and the detailed description of the drawings below, serve to explain the principles of the present invention.

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0024] Figure 1 It is a schematic diagram of a tool for testing a static torque sensor in a simulated deep-sea working condition according to the present invention;

[0025] Figure 2 It is an exploded schematic diagram of the present utility model.

[0026] Description of reference numerals in the figures:

[0027] 1 is the torque multiplier, 2 is the input connector,

[0028] 3 is the upper sealing ring, 4 is the adjusting screw,

[0029] 5 is the shell, 6 is the oil pipe,

[0030] 7 is the static torque sensor to be measured, 8 is the screw,

[0031] 9 is the lower sealing ring, 10 is the output connector,

[0032] 11 is an underwater connector, 12 is a square key,

[0033] 13 is the vent plug. DETAILED DESCRIPTION

[0034] To further clarify the objectives, technical solutions, and advantages of the embodiments of the present invention, the technical solutions of the embodiments of the present invention will be described below in detail and in full, in conjunction with the accompanying drawings. It should be understood that the described embodiments represent only a portion of the embodiments of the present invention, and are not intended to be exhaustive. Based on the described embodiments of the present invention, all other embodiments derived by persons of ordinary skill in the art without inventive effort are intended to fall within the scope of protection of the present invention. Unless otherwise defined, technical or scientific terms used herein should have the same meanings as those commonly understood by persons of ordinary skill in the art to which the present invention pertains. The terms "first," "second," and similar expressions used herein do not denote any order, quantity, or importance; they are merely used to distinguish between different components. Terms such as "including" and "comprising" mean that the element or object preceding the term includes the elements or objects listed after the term, and their equivalents, without excluding other elements or objects. Terms such as "upper," "lower," "left," and "right" are used solely to indicate relative positions. When the absolute position of the described object changes, the relative position may also change accordingly.

[0035] like Figure 1 、 Figure 2 As shown, the tool for testing a static torque sensor in simulated deep-sea working conditions of the present invention includes a housing 5, wherein the cylindrical inner cavity of the housing 5 forms an oil cavity A for accommodating a static torque sensor 7 to be tested (hereinafter referred to as sensor 7);

[0036] The upper portion of the housing 5 is provided with an input connector 2, and the lower portion of the housing 5 is provided with an output connector 10; the output connector 10 is fixedly connected to the housing 5 by a plurality of bolts;

[0037] The input connector 2 is fixedly connected to the output end of the torque multiplier 1;

[0038] An exhaust hole is provided in the middle of the input connector 2, and an air release plug 13 is provided in the exhaust hole;

[0039] Specifically, the outer cylindrical surface of the input connector 2 matches the inner cylindrical surface of the upper portion of the housing 5;

[0040] Furthermore, the input connector 2 is provided with a plurality of square grooves (two square grooves are shown in the figure) extending in the axial direction, and the square grooves match the square keys 12;

[0041] Two clearance adjustment blocks are provided on either side of the upper end of the housing 5. The spacing between the two clearance adjustment blocks matches the thickness of the square key 12, so that the square key 12 can extend into the slot formed between the two clearance adjustment blocks. A threaded hole is provided in the side wall of one or both of the clearance adjustment blocks, and an adjustment screw 4 extending laterally is passed through the threaded hole. When the square key 12 extends sequentially from top to bottom into the slot formed between the input connector 2 and the two clearance adjustment blocks, the adjustment screw 4 is tightened so that its tip contacts the side of the square key 12, so that the square key 12 locks the upper flange of the sensor 7, the input connector 2, and the housing 5 into a single body.

[0042] The adjusting screw 4 of the present invention can generate a thrust on the key 12, and can lock the input connector 2 and the upper part of the housing 5, so that the torque applied to the sensor 7 can be maintained after the torque is removed; turning the adjusting screw 4 can adjust the thrust of the key 12, thereby compensating for the reduction in applied torque caused by the elastic deformation between the connecting widths.

[0043] The output connector 10 is provided with a workbench connection portion so that the output connector 10 can be fixedly connected to a workbench (the workbench is not shown in the figure);

[0044] An upper sealing ring 3 is provided between the input connector 2 and the housing 5 ; a lower sealing ring 9 is provided between the output connector 10 and the housing 5 ; the oil chamber of the housing 5 is isolated from the outside world by the upper sealing ring 3 and the lower sealing ring 9 .

[0045] The upper flange of the sensor 7 is fixedly connected to the input connector 2 by a set of screws 8; the lower flange of the sensor 7 is fixedly connected to the output connector 10 by another set of screws 8;

[0046] One end of the oil pipe 6 is connected to the inner cavity of the housing 5 through a transition joint, and the other end of the oil pipe 6 is connected to the compensator. The oil pipe 6 connects the water pressure of the working environment of the compensator with the inner cavity of the housing 5, so that the oil pressure in the oil cavity where the sensor 7 is located (i.e., the inner cavity of the housing 5) is the same as the water pressure of the working environment of the compensator.

[0047] One end of the underwater connector 11 extends into the inner cavity of the shell 5 and is connected to the transmission cable of the sensor 7. The other end of the underwater connector 11 is connected to an external transmission cable. The transmission cable is used to supply power to the sensor 7 and transmit the signals collected by the sensor 7 to an external controller.

[0048] The working principle of this utility model is as follows:

[0049] The first step is to apply torque to the sensor 7 on the ground and collect the torque value applied to the sensor 7;

[0050] Install the sensor 7 to be tested into the inner cavity of the housing 5, and fix the upper and lower flanges of the sensor 7 to the input connector 2 and the output connector 10 respectively using two sets of screws 8;

[0051] Connect the output connector 10 to the workbench on the ground;

[0052] Loosen the bleed plug 13 on the input connector 2; then add mineral oil to the inner cavity of the housing 5 through the oil pipe 6 so that the sensor 7 to be tested is immersed in the oil; after the vent hole is completely vented, tighten the bleed plug 13;

[0053] Then, the input connector 2 is fixedly connected to the output end of the torque multiplier 1;

[0054] A torque wrench is used to apply torque to the torque multiplier 1. The torque multiplier 1 amplifies the torque and transmits it to the upper flange of the sensor 7. Since the lower flange of the sensor 7 is fixedly connected to the housing 5 and the workbench via the output connector 10, the torque from the torque wrench and amplified by the torque multiplier 1 causes the sensor 7 to twist and deform, causing the current of the sensor 7 to change. The sensor 7 transmits this signal to the external controller via the underwater connector 11.

[0055] The external controller records the torque value of the torque wrench and the current value output by the sensor 7 (i.e., the ground current value);

[0056] The second step is to keep the torque on the sensor 7 constant and move the sensor 7 underwater.

[0057] Insert the square key 12 from top to bottom into the square groove of the input connector 2 and the slot formed between the two gap adjustment blocks, and turn the adjustment screw 4 so that its end contacts the side of the square key 12.

[0058] Then remove the torque wrench and torque multiplier 1, and turn the adjusting screw 4 to adjust the thrust on the key 12. While turning, observe until the current value output by the sensor 7 is equal to the current value output by the sensor 7 recorded in the first step (i.e., the ground current value) to eliminate the torque change caused by the elastic deformation between the connecting widths.

[0059] The third step is to collect the torque value of the sensor 7 under the deep sea high pressure;

[0060] The housing 5 containing the sensor 7 and the compensator connected to the oil pipe 6 are placed in a simulated deepwater pressure chamber. Since the oil pipe 6 is connected to the compensator, the oil pressure in the inner cavity of the housing 5 is the same as the water pressure in the simulated deepwater pressure chamber due to the communication effect of the compensator.

[0061] Then, the current value output by the underwater sensor 7 (i.e., the underwater current value) is transmitted to the external controller via the underwater connector 11;

[0062] By comparing the surface current value collected by the sensor 7 with the underwater current value, the performance of the sensor 7 in a deep water and high pressure environment can be obtained.

[0063] The present invention can detect the current values ​​output by the static torque sensor above water and underwater respectively under experimental conditions where the torque applied to the sensor is the same. Since the current value output by the sensor is linearly related to the torque applied to the sensor 7, the torque values ​​applied to the sensor above water (i.e., on the ground) and underwater can be obtained. By comparing the two, the performance changes of the static torque sensor in a deep-sea high-pressure environment and in a normal-pressure environment above water can be obtained.

[0064] During the test process, the utility model immerses the static torque sensor in the oil chamber. When measuring the current value output by the sensor underwater, the oil pressure in the oil chamber is equal to the external environmental water pressure due to the connectivity of the compensator. The external environmental water pressure is determined by the water depth. Therefore, the utility model can simulate the working conditions of deep-sea operating environments, realize the test of static torque sensors for deep-water operations, and solve a bottleneck problem in the development of underwater ROV torque tools.

[0065] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A tool for testing static torque sensors in simulated deep-sea conditions, characterized in that: include: A housing, the inner cavity of which is used to accommodate the static torque sensor to be measured; one end of an oil pipe is connected to the inner cavity of the housing, and the other end of the oil pipe is connected to a compensator; one end of an underwater connector extends into the inner cavity of the housing and is connected to the sensor, and the other end of the underwater connector is connected to an external cable and a signal receiver; An input connector connected to the upper portion of the housing; the input connector is provided with an exhaust hole, and a vent plug is provided in the exhaust hole; the input connector is provided with a plurality of square grooves; the upper portion of the housing is formed with a plurality of slots, and the slots are provided with adjustment screws; A plurality of square keys are matched with the square grooves of the input connector and the slots of the housing; when the square keys are inserted into the square grooves of the input connector and the slots of the housing, turning the adjustment screws can cause the ends of the square keys to contact the sides of the square keys; an output connector connected to the lower portion of the housing; the output connector is provided with a workbench connection portion, and the output connector is fixedly connected to the workbench through the workbench connection portion; and The torque multiplier has an output end connected to the input connecting piece.

2. The tool for testing static torque sensors under simulated deep-sea conditions according to claim 1, characterized in that: Two gap adjustment blocks are respectively provided on both sides of the upper end of the shell, and the slot is formed between the two gap adjustment blocks; the distance between the two gap adjustment blocks matches the thickness of the square key.

3. The tool for testing static torque sensors under simulated deep-sea conditions according to claim 2, characterized in that: One or both of the two gap adjustment blocks are provided with a threaded hole, and the adjustment screw is passed through the threaded hole.

4. The tool for testing static torque sensors in simulated deep-sea conditions according to claim 3, characterized in that: The adjusting screw extends in a transverse direction.

5. The tool for testing static torque sensors in simulated deep-sea conditions according to claim 1, characterized in that: The upper flange of the static torque sensor to be measured is fixedly connected to the input connector by a set of screws.

6. The tool for testing static torque sensors in simulated deep-sea conditions according to claim 1 or 5, characterized in that: The lower flange of the static torque sensor to be measured is fixedly connected to the output connector by another set of screws.

7. The tool for testing a static torque sensor under simulated deep-sea working conditions according to claim 1, characterized in that: The input connecting piece is matched with the inner cylindrical surface of the upper part of the shell through its outer cylindrical surface.

8. The tool for testing a static torque sensor under simulated deep-sea working conditions according to claim 1 or 7, characterized in that: The output connecting piece is fixedly connected to the lower part of the housing by means of bolts.

9. The tool for testing a static torque sensor under simulated deep-sea working conditions according to claim 1, characterized in that: An upper sealing ring is provided between the input connector and the housing.

10. The tool for testing a static torque sensor in simulated deep-sea conditions according to claim 1 or 9, characterized in that: A lower sealing ring is provided between the output connecting piece and the housing.

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