A wireless cable tension measurement system for integrated measurement and adjustment construction

Abstract

The invention provides a wireless cable tension measuring system in integrated measurement and adjustment construction, wherein the cable passes through a Martindike, a ground pulley and a sky pulley in sequence, the sky pulley contacts an elastic body component through a strut, the lower part of the strut is inserted into a pulley seat, and the pulley seat is connected to a wireless tension sensor; a bearing body is installed in the inner cavity of an outer shell, an elastic body component is installed in the bearing body, the lower part of the outer shell is connected to an end cover, the end cover and the lower part of the inner shell form a closed space, a circuit bracket is installed in the closed space, a processing circuit is installed on the circuit bracket, the processing circuit is connected to an antenna, and the processing circuit is plugged into a battery; the advantages are: the invention measures the pressure of the sky pulley through a wireless tension sensor to obtain the tension value of the cable, reduces the number of bending times of the cable, increases the service life of the depth metering wheel and the cable, and improves the measurement accuracy; adopts an integrated design, the mechanical structure is firm, reliable and not easy to be damaged; adopts a low power consumption design, and is easy to use.

Description

Technical Field

[0001] The invention relates to the field of oilfield water well testing, and in particular to a wireless cable tension measuring system in integrated testing and adjustment construction. Background Art

[0002] In the integrated measurement and adjustment construction, an important role of armored cable is to transport the downhole instruments to the target depth. The tension data is related to factors such as the dead weight of the cable lowered into the well, the weight of the downhole instruments, the viscosity of the liquid in the well, and the lifting and lowering speed. Reliable cable tension data can directly reflect the operation of the downhole instruments and cables in the well. Its accuracy is of great significance to the construction qualification rate and safe construction.

[0003] The currently known measurement method is the vertical Martindike metering wheel force measurement method. The depth metering wheel and guide pulley in the Martindike are subjected to excessive pressure, which will greatly accelerate the wear speed of the depth metering wheel, guide pulley and cable, seriously affecting the service life of the depth metering wheel, guide pulley and cable. Wear will also cause the angle θ of the cable on the depth metering wheel to become larger, resulting in inaccurate cable tension measurement. Wear of the depth metering wheel will cause its circumference to decrease and ultimately lead to inaccurate depth measurement. Due to the volume limitation of the Martindike, the diameters of the two guide pulleys are usually less than 90mm, which is much smaller than the minimum bending diameter of the cable of 190mm. The mechanical bending damage of the cable is large, which seriously affects the service life of the cable. In view of the shortcomings of the existing technical solutions, some construction units directly use vertical Martindike without tension measurement function, so that the service life of the Martindike metering wheel and armored cable is guaranteed, but the lack of tension data poses a safety hazard to safe construction. Summary of the invention

[0004] The purpose of the present invention is to provide a wireless cable tension measurement system in integrated measurement and adjustment construction in order to solve the deficiencies of the prior art.

[0005] The new technical solution of the present invention is: a wireless cable tension measurement system in integrated measurement and adjustment construction, including Martindike, a ground pulley, an overhead pulley, a strut, a pulley seat, a cable, a blowout preventer, a downhole instrument, a wireless tension sensor and a wireless tension host, the Martindike includes a depth metering wheel and a clamping wheel, the cable passes through the Martindike, the ground pulley and the overhead pulley in sequence, and the cable passes straight between the depth metering wheel and the clamping wheel, one end of the cable is connected to the downhole instrument; the overhead pulley contacts the elastomer component through the strut, the lower part of the strut is inserted into the pulley seat, one end of the pulley seat is sleeved on the upper part of the blowout preventer, and the other end of the pulley seat is connected to the wireless tension sensor through a thread; the wireless tension sensor includes an elastomer The wireless tension host is installed in the operating room of the test vehicle. The wireless tension host includes a housing, a PVC coated button, an OLED display, an antenna and a circuit assembly. The wireless tension host includes a housing, a PVC coated button, an OLED display, an antenna and a circuit assembly. The wireless tension host includes a housing, a PVC coated button, an OLED display, an antenna and a circuit assembly. The circuit assembly is installed in the housing of the wireless tension host.

[0006] The shell is made of metal.

[0007] The end cap is made of nylon.

[0008] The antenna is a wireless transceiver antenna.

[0009] The elastomer component is 2Cr13.

[0010] The battery is a disposable lithium battery.

[0011] The cable is an armored cable.

[0012] The Martindike is a tension-free standard vertical Martindike.

[0013] The beneficial effects of the present invention are as follows: the present invention measures the pressure of the sky pulley through a wireless tension sensor to obtain the tension value of the cable, reduces the number of bending times of the cable, increases the service life of the depth metering wheel and the cable, and improves the measurement accuracy; adopts an integrated design, the mechanical structure is firm, reliable and not easy to damage; adopts a low power consumption design, and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention.

[0015] Figure 2 This is a schematic diagram of the structure of Martindike.

[0016] Figure 3 It is a structural diagram of the sky pulley.

[0017] Figure 4 This is a schematic diagram of the structure of the wireless tension sensor.

[0018] Figure 5 This is the circuit block diagram of the wireless tension sensor.

[0019] Figure 6 This is the circuit schematic diagram of the wireless tension sensor.

[0020] Figure 7 This is the circuit block diagram of the wireless tension host.

[0021] Figure 8 This is the circuit schematic diagram of the wireless tension host.

[0022] Fig. 9 Software flow chart for wireless tension sensor.

[0023] Among them: 1 is Martindike, 101 is a depth metering wheel, 102 is a clamping wheel, 2 is a ground pulley, 3 is a ceiling pulley, 4 is a support rod, 5 is a pulley seat, 6 is a wireless tension sensor, 601 is an elastomer component, 602 is a shell, 603 is a carrier, 604 is a processing circuit, 605 is an end cover, 606 is an antenna, 607 is a battery, 7 is a cable, 8 is a blowout preventer, 9 is a downhole instrument, and 10 is a wireless tension host. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] A wireless cable tension measurement system in integrated measurement and adjustment construction comprises a Martindike 1, a ground pulley 2, an overhead pulley 3, a strut 4, a pulley seat 5, a cable 7, a blowout preventer 8, a downhole instrument 9, a wireless tension sensor 6 and a wireless tension host 10, wherein the Martindike 1 comprises a depth metering wheel 101 and a clamping wheel 102, wherein the cable 7 passes through the Martindike 1, the ground pulley 2 and the overhead pulley 3 in sequence, and the cable 7 passes straightly between the depth metering wheel 101 and the clamping wheel 102, and one end of the cable 7 is connected to the downhole instrument 9; the overhead pulley 3 contacts with an elastomer component 601 through a strut 4, the lower part of the strut 4 is inserted into a pulley seat 5, one end of the pulley seat 5 is sleeved on the upper part of the blowout preventer 8, and the other end of the pulley seat 5 is connected to the wireless tension sensor 6 through a thread; the wireless tension sensor 6 comprises an elastomer component 601, a housing 602, a carrier 603, a processing circuit The outer shell 602 is provided with a boss, the inner cavity of the outer shell 602 is provided with a carrier 603 installed by a thread, the carrier 603 is provided with an elastomer component 601, the lower part of the outer shell 602 is connected with the end cover 605 by a thread, the end cover 605 and the inner lower part of the outer shell 602 constitute a closed space, the closed space and the bottom of the carrier 603 are provided with a circuit bracket, the circuit bracket is provided with a processing circuit 604, the processing circuit 604 is connected with an antenna 606 by a thread, and the processing circuit 604 is connected with a battery 607; the wireless tension host 10 is installed in the operating room of the test vehicle, the wireless tension host 10 includes a shell, a PVC coated button, an OLED display, an antenna 606 and a circuit assembly, and the circuit assembly is installed in the shell of the wireless tension host 10.

[0026] The housing 602 is made of metal.

[0027] The end cap 605 is made of nylon.

[0028] The antenna 606 is a wireless transceiver antenna.

[0029] The elastomer component 601 is 2Cr13.

[0030] The battery 607 is a disposable lithium battery.

[0031] The cable 7 is an armored cable.

[0032] The Martindike 1 is a tension-free standard vertical Martindike.

[0033] A standard vertical Martindike 1 with a tension-free measurement function is used. The cable 7 passes straight through between the depth metering wheel 101 and the clamping wheel 102. The force exerted by the cable 7 on the depth metering wheel 101 is 0 kgf. The pressure on the contact surface between the depth metering wheel 101 and the cable 7 is equal to the pressure of the clamping wheel 102, which is usually ≤10 kgf. This minimizes the pressure load on the contact surface between the depth metering wheel 101 and the cable 7, reduces the resulting wear, and extends the service life of the depth metering wheel 101 and the cable 7.

[0034] The right end of the pulley seat 5 is sleeved on the upper end of the anti-blowout pipe 8, the upper part of the left end is inserted into the support rod 4, and the lower end is connected to the wireless tension sensor 6 through a threaded buckle.

[0035] After the support rod 4 is inserted into the pulley seat 5, the support rod 4 contacts the top of the elastic component 601 in the wireless tension sensor 6, and transmits the pressure of the upper pulley 3 to the elastic component 601. The angle θ formed by the cable 7 on the upper pulley 3 is 0°. Assuming the tension of the cable 7 is f, the downward pressure of the support rod 4 is F=2f[cos(θ / 2)]=2f.

[0036] The wireless tension sensor 6 adopts an integrated and low-power design, has no exposed electrical components, and has a firm and reliable structure that is not easy to damage. The wireless tension sensor 6 consists of a housing 602, a carrier 603, an elastic component 601, a processing circuit 604, an end cover 605, an antenna 606, and a disposable lithium battery 607. The elastic component 601 bears the pressure of the sky pulley 3, thereby generating an electrical signal proportional to the tension of the cable 7. The elastic body is made of 2Cr13 material, and the strain gauge is a foil-type temperature-compensated high-precision strain gauge bridge mounted on the side elevation to generate an electrical signal proportional to the deformation of the elastic body. The upper part of the housing 602 is connected to the lower end of the pulley seat 5 by a threaded connection to bear the pressure of the carrier 603, and the lower end is connected to the end cover 605 by a threaded connection to form a closed space for installing the processing circuit 604. The carrier 603 is screwed into the housing 602, and the bottom of the inner cavity of the carrier 603 bears the pressure of the elastic component 601, and the lower end of the carrier 603 provides a fixing function for the circuit part. The processing circuit 604 of the wireless tension sensor 6 is installed on the circuit bracket at the bottom of the carrier 603. It is composed of integrated circuits such as a mixed signal microcontroller U4, power circuits U5 and U6, reference circuits U1 and U2, and a wireless transceiver circuit U3, supplemented by necessary peripheral components, to complete functions such as control, data acquisition, encoding and decoding, and wireless transceiver. The interface part JP1 is connected to the output plug of the strain bridge of the elastic component 601, JP2 is connected to the built-in antenna 606, and JP4 is connected to the plug of the disposable lithium battery 607. The end cover 605 is connected to the lower end of the metal shell 602 by a thread, and its function is to form a closed space with the metal shell 602 to protect the internal components, while not affecting the transceiver of radio signals. The wireless transceiver antenna 606 is connected to JP2 on the processing circuit 604 by a thread. The disposable lithium battery 607 is connected to the JP4 socket on the processing circuit 604.

[0037] The wireless tension host 10 is composed of a housing, a PVC film-coated button, an OLED display, an antenna 606 and a circuit assembly. The host is installed in the operating room of the test vehicle to complete the functions of wireless data transmission and reception, abnormal alarm, data display, sensor matching, and calibration. The circuit assembly is installed inside the housing of the host. The circuit assembly is composed of integrated circuits such as a mixed signal microcontroller U1, a wireless transceiver U2, an OLED display circuit U3, an analog output drive circuit U8, a power supply circuit U5, U6, U7 and U9, supplemented by necessary peripheral components, to complete the functions of data encoding and decoding, wireless transmission and reception, display, alarm and output; the interface part JP2 is connected to the antenna 606 plug fixed on the housing of the host, JP3 is connected to an external alarm or control device, JP4 is connected to the PVC film-coated button plug, and when used online with the winch panel, JP5 is connected to the wired tension interface of the winch panel in the operating room to obtain a 12V power supply and output analog tension signals. When used alone, JP5 is connected to an external 12V power supply.

[0038] The following is a brief description of the software flow of the present invention in conjunction with the software flow chart of the wireless tension sensor 6:

[0039] Sleep mode: When the wireless tension host 10 is turned off, the wireless tension sensor 6 will not be able to receive valid return data after sending data. After 40 seconds, the receiving counter overflows and the wireless tension sensor 6 enters sleep mode. Except for the timer, all other circuits and microcontrollers inside the sensor stop running. At this time, the wireless tension sensor 6 circuit is in a micro-power consumption state. The timer overflows and generates an interrupt after running for 40 seconds. The microcontroller is awakened and executes a data receiving program. If the data is invalid, the microcontroller stops running and waits for the timer to be awakened by the next timer overflow.

[0040] Operation mode: After the wireless tension host 10 is turned on, it continuously sends the identity code and operation instructions of the target sensor for 50 seconds. The corresponding wireless tension sensor 6 enters the operation mode after receiving it. After the line tension sensor enters the operation mode, it collects tension and battery 607 voltage data every 50 milliseconds, and determines whether to send data based on the data change amplitude and the interval time between two transmissions. This not only ensures the system response speed but also effectively reduces the power consumption of the operation mode. After the data is successfully sent, the receiving program is immediately executed to receive the return instruction data of the host to determine the next operation mode.

[0041] Calibration mode: When the wireless tension sensor 6 is in the operation mode, the wireless tension host 10 sends an identity code and a calibration command. After receiving the command data, the corresponding sensor enters the calibration program. After the calibration is completed, the calibration data is stored in the flash memory for program call, and then it enters the operation mode.

[0042] Sensor matching: When the wireless tension sensor 6 is in sleep mode, the wireless tension host 10 sends a sensor matching command. After receiving it, the target sensor sends an identity code. After receiving it, the wireless tension host 10 displays the corresponding sensor number and stores the information in the flash memory to complete the matching of the new sensor.

Claims

1. A wireless cable tension measurement system in integrated measurement and adjustment construction, comprising a Martindike (1), a ground pulley (2), a top pulley (3), a support rod (4), a pulley seat (5), a cable (7), a blowout preventer (8), a downhole instrument (9), a wireless tension sensor (6) and a wireless tension host (10), wherein the Martindike (1) comprises a depth measuring wheel (101) and a clamping wheel (102), and is characterized in that: The cable (7) passes through the Martindike (1), the ground pulley (2) and the sky pulley (3) in sequence, and the cable (7) passes straightly between the depth measuring wheel (101) and the pressure wheel (102), and one end of the cable (7) is connected to the downhole instrument (9); the sky pulley (3) contacts the elastic body component (601) through the support rod (4), the lower part of the support rod (4) is inserted into the pulley seat (5), one end of the pulley seat (5) is sleeved on the upper part of the blowout preventer (8), and the other end of the pulley seat (5) is connected to the wireless tension sensor (6) through a thread; the wireless tension sensor (6) includes an elastic body component (601), a shell (602), a carrier (603), a processing circuit (604), an end cover (605), an antenna (606) and a battery (607), the inner cavity of the shell (602) is provided with a boss, and the shell ( The inner cavity of the housing (602) is provided with a carrier (603) by means of threads, an elastic body component (601) is installed in the carrier (603), the lower part of the housing (602) is connected to the end cover (605) by means of threads, the end cover (605) and the lower part of the housing (602) form a closed space, a circuit bracket is installed in the closed space and at the bottom of the carrier (603), a processing circuit (604) is installed on the circuit bracket, the processing circuit (604) is connected to an antenna (606) by means of threads, and a battery (607) is plugged into the processing circuit (604); the wireless tension host (10) is installed in the operating room of the test vehicle, the wireless tension host (10) comprises a housing, a PVC coated button, an OLED display, an antenna (606) and a circuit assembly, and the circuit assembly is installed in the housing of the wireless tension host (10).

2. The wireless cable tension measurement system in the integrated measurement and adjustment construction according to claim 1 is characterized by: The housing (602) is made of metal.

3. The wireless cable tension measurement system in the integrated measurement and adjustment construction according to claim 1 is characterized in that: The end cap (605) is made of nylon.

4. The wireless cable tension measurement system in the integrated measurement and adjustment construction according to claim 1 is characterized in that: The antenna (606) is a wireless transceiver antenna.

5. The wireless cable tension measurement system in the integrated measurement and adjustment construction according to claim 1 is characterized by: The elastomer component (601) is 2Cr13.

6. The wireless cable tension measurement system in the integrated measurement and adjustment construction according to claim 1 is characterized by: The battery (607) is a disposable lithium battery.

7. The wireless cable tension measurement system in the integrated measurement and adjustment construction according to claim 1 is characterized by: The cable (7) is an armored cable.

8. The wireless cable tension measurement system in the integrated measurement and adjustment construction according to claim 1 is characterized by: The Martindike (1) is a tension-free standard vertical Martindike.

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