CN211291850U

CN211291850U - Mud pressure sensor

Info

Publication number: CN211291850U
Application number: CN201922271592.1U
Authority: CN
Inventors: 卫永波; 孙欣
Original assignee: Xi'an Honeycomb Intelligent Computing Information Technology Co ltd
Current assignee: Xi'an Honeycomb Intelligent Computing Information Technology Co ltd
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-08-18
Anticipated expiration: 2029-12-18

Abstract

The utility model provides a mud pressure sensor, adopt the union mounting structure, through elastic element, and a housing, waterproof aviation plug's mounting structure improves, it does not have the change under the hammering pretightning force when installation to have guaranteed sensor output, the user does not need to go to gather the pressure value through data correction's method when using again, more important sensor only just takes place strain deformation when having pressure test, and not be in under the exogenic action for a long time, avoided consequently causing the maintenance rate height, influence the problem of safety in production.

Description

Mud pressure sensor

Technical Field

The utility model relates to a sensor specifically indicates a mud pressure sensor.

Background

In the process of oil field fracturing and drilling operation, the pressure sensor is used for providing main monitoring data to ensure safe production. The existing sensor structure adopts thread installation, so that the reliability of long-term operation cannot be guaranteed, the phenomena of thread damage and separation of the sensor from a pressure interface occur. If so, the production is stopped, and if not, the safety accident is caused.

At present, a sensor using an oil union mounting structure is also used, but the structure of the sensor is not completely suitable for the oil union mounting structure, the oil union is mounted by hammering and fastened, the force can be loaded on the whole structure of the sensor through an oil union fastening surface, the force generates huge stress on a sensor strain area, the common sensor cannot be eliminated, the sensor generates pressure output under the condition of not measuring the pressure, and therefore the test data is inaccurate, the precision is reduced, and the maintenance rate is too high. The performance index, long-term stability and reliability of the composite material can not reach the operation technical index, the repair rate is high, the composite material influences the oil field operation and mechanical equipment construction, and the production delay and the stagnation phenomenon are caused by frequent replacement, so that the immeasurable economic loss is caused.

Disclosure of Invention

The utility model provides a technical scheme that technical problem adopted as follows: a mud pressure sensor comprises an elastic element, a shell and a waterproof aviation plug, wherein the shell is hermetically connected with the elastic element, the waterproof aviation plug is connected with the shell through a flange, a resistance strain type sensor is arranged on the elastic element, a diaphragm is arranged on the resistance strain type sensor and is connected with a temperature compensation plate through a flexible lead, a compensation circuit is arranged on the temperature compensation plate, the resistance strain type sensor is also connected with an amplification circuit through the flexible lead, and the compensation circuit is connected with the amplification circuit through the flexible circuit; the bottom of the elastic element is divided into a stress deformation part and an installation part, the stress deformation part and the installation part are of an integral structure, and the stress deformation part is connected with the temperature compensation plate.

Further, an oil tank is installed at the installation position of the bottom of the elastic element.

Furthermore, the bottom stress deformation part of the elastic element is of a trapezoidal boss structure.

The utility model discloses an innovation part lies in: the bottom of the elastic element is divided into a stress deformation part and an installation part, the stress deformation part and the installation part are of an integral structure, and a strain area (deformation part) is positioned in the integral structure, so that the boundary of the strain area and the areas of shear strain and radial strain are isolated, the thickness of the strain area is effectively increased, and high-voltage test and high overload capacity are realized; the resistance strain type sensor is connected with the temperature compensation plate through the flexible lead, and the resistance strain type sensor is subjected to temperature compensation, so that the sensor can be normally operated and used in different regions and at different temperatures.

Drawings

Fig. 1 is a schematic structural view of the pressure sensor of the present invention;

FIG. 2 is a temperature compensation circuit diagram of the present invention;

FIG. 3 is an enlarged circuit diagram of the present invention

Fig. 4 is a schematic view of the installation structure of the pressure sensor and the union according to the present invention.

Detailed Description

In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The noun explains: the union is a movable joint of the pipe. The welding type hydraulic pipeline automatic control device is of a welding type, a clamping sleeve type, a flaring type and the like, is adopted in the industries of large and heavy machinery, mining machinery, engineering machinery, metallurgical machinery, petroleum machinery and ship machine tools, and is widely applied to hydraulic pipelines and automatic equipment of various machines.

As shown in figure 1, the mud pressure sensor comprises an elastic element 1, a shell 7 and a waterproof aviation plug 6, wherein the shell 1 and the elastic element 7 are connected in a welding and sealing mode, the mud pressure sensor is suitable for field operation, and the sensor is not damaged due to splashing of mud in rainy and snowy weather. The waterproof aviation plug 6 and the shell 7 are connected through the silica gel sealing gasket and the flange, and the open-air operation can be achieved in the protection level without faults.

As shown in fig. 2 and 3, a resistance strain type sensor 5 is arranged on the elastic element 1, a diaphragm 4 is arranged on the resistance strain type sensor 5 and is connected with a temperature compensation plate through a flexible lead, a compensation circuit 2 is arranged on the temperature compensation plate, the resistance strain type sensor 5 is further connected with an amplification circuit 3 through a flexible lead, and the compensation circuit 2 and the amplification circuit 3 are connected through a flexible circuit; the bottom of the elastic element 1 is divided into a stress deformation part 8 and an installation part 9, the stress deformation part 8 at the bottom of the elastic element 1 is of a trapezoidal boss structure, the stress deformation part 8 and the installation part 9 are of an integral structure, and the stress deformation part 8 is located in the integral structure and connected with a temperature compensation plate. The strain area (deformation part) is positioned in the whole structure, so that the boundary of the strain area and the areas of shear strain and radial strain are isolated, the thickness of the strain area is effectively increased, and high-pressure test and high overload capacity are realized; the sensor output is ensured to be unchanged under the hammering pretightening force when being installed, a user does not need to acquire a pressure value by a data correction method when using the sensor, and the more important sensor is only subjected to strain deformation during pressure test, but not under the action of external force for a long time, so that the problems of high maintenance rate and influence on safe production are avoided. The resistance strain type sensor is connected with the temperature compensation plate through the flexible lead, and the resistance strain type sensor is subjected to temperature compensation, so that the sensor can be normally operated and used in different regions and at different temperatures.

As shown in figure 4, the installation part 9 at the bottom of the elastic element 1 is provided with an oil tank 10, so that after the oil tank and the sensor are installed, data acquisition of a test port is quickly connected through a waterproof aviation plug, an output end directly enters a data acquisition system, actual pressure parameters are visually detected in a monitoring room through computer detection software identification, the actual parameters are fed back to the actual operation conditions of an oil field well cementation device, the operation of a drilling device, a fracturing truck and the drilling condition of a drilling machine, and the functions of detection and early warning are achieved. The operation is convenient, the response speed of remote data transmission is high, the data waveform is stable, when the high-frequency motor and the low-frequency signal equipment work simultaneously, the sensor signal has no interference influence, and the performance index completely meets the actual operation requirement through static and dynamic tests.

The hammering force quantity of the sensor installation has no influence on the static output of the sensor, the defects of the sensor of the union installation structure in the prior art are overcome, the installation and the use of operators are facilitated, the operation efficiency is greatly improved, the continuous operation of the sensor has no fault, the measured data is reliable and stable, and the safety production is ensured.

Claims

1. The mud pressure sensor comprises an elastic element (1), a shell (7) and a waterproof aviation plug (6), and is characterized in that the shell (7) is connected with the elastic element (1) in a sealing manner, the waterproof aviation plug (6) is connected with the shell (7) through a flange, a resistance strain type sensor (5) is arranged on the elastic element (1), a diaphragm (4) is arranged on the resistance strain type sensor (5) and is connected with a temperature compensation plate through a flexible lead, a compensation circuit (2) is arranged on the temperature compensation plate, the resistance strain type sensor (5) is further connected with an amplification circuit (3) through a flexible lead, and the compensation circuit (2) is connected with the amplification circuit (3) through a flexible circuit; the bottom of the elastic element (1) is divided into a stress deformation part (8) and a mounting part (9), the stress deformation part (8) and the mounting part (9) are of an integral structure, and the stress deformation part (8) is positioned in the integral structure and is connected with a temperature compensation plate.

2. Mud pressure sensor according to claim 1, characterised in that the elastic element (1) is fitted with an oil dam (10) at its bottom mounting point (9).

3. The mud pressure sensor as claimed in claim 1, wherein the bottom forced deformation part (8) of the elastic element (1) is a trapezoid boss structure.