Testing device for measurement-while-drilling instrument

Abstract

The utility model discloses a testing device for a measurement-while-drilling instrument, which comprises a simulation measurement-while-drilling instrument signal unit, a simulation pulse generator rotating speed signal unit and a power supply unit for supplying power to the simulation measurement-while-drilling instrument signal unit and the simulation pulse generator rotating speed signal unit, and a measurement-while-drilling instrument signal output by the simulation pulse generator rotating speed signal unit is sent to the simulation measurement-while-drilling instrument signal unit through the measurement-while-drilling instrument. The simulation measurement-while-drilling instrument signal unit is adopted, so that the working state of the measurement-while-drilling instrument in a well is tested on the ground, the technical defect that the measurement-while-drilling instrument can only be tested after going out of a casing pipe is overcome, and the success rate of one-time going-into-well of the measurement-while-drilling instrument is increased.

Description

Technical Field

[0001] This utility model belongs to the field of measurement while drilling technology, and specifically relates to a testing device for a measurement while drilling instrument. Background Technology

[0002] Measurement while drilling (MWD) controls the directional drilling of the drill bit by measuring engineering parameters such as wellbore inclination, azimuth, and tool face angle in real time. Currently, MWD systems can be categorized into wired and wireless transmission methods based on data transmission. In practice, MWD processes utilize wireless transmission, where mud pulsers generate mud pressure pulses to transmit measurement data.

[0003] Typically, instruments must be tested for operational status during maintenance or before being deployed into the well. However, current surface testing methods, both domestically and internationally, utilize wired transmission for performance testing. While wired transmission can test key parameters such as well inclination, azimuth, and tool face angle, it cannot test the operation of the mud pulse generator or the instrument's handling. Therefore, it's impossible to test all parameters of the entire instrument, meaning testing can only be conducted after the instrument is run out of the casing. If the measurement-while-drilling (MWD) instrument malfunctions, it must be pulled out of the well and replaced, resulting in decreased drilling efficiency and increased costs.

[0004] Chinese invention patent application (application number 202111459083.7) discloses a drilling measurement while drilling instrument box with self-testing function, specifically relating to the technical field of oil drilling instrument boxes. The technical solution includes a box body, support legs, and a cover plate. The support legs are welded to the lower end of the box body, and the cover plate is snapped onto the upper end of the box body. It also includes a material management mechanism installed inside the box body. The beneficial effects of this invention are: by using a wide nitrile rubber gasket to seal the instrument transport box, and equipping the box with a management system to manage materials, it prevents the loss or omission of materials to the site. It automatically counts materials using radio frequency identification technology, provides material shortage alerts, and monitors the instrument status to ensure that the instruments inside the box are in optimal working condition. It provides early warnings of potential instrument problems, exposing unexpected issues before operation. It monitors the internal environment to predict battery status and provides alerts when the internal environment may damage the equipment and instruments. However, it cannot test the working status of the mud pulse generator and the instrument's processing status, therefore it cannot test all parameters of the entire instrument. Summary of the Invention

[0005] The purpose of this invention is to solve the above-mentioned technical problems and provide a testing device for a drilling measurement instrument that enables the ground-based testing of the drilling measurement instrument in its working state inside the well.

[0006] To achieve the above objectives, this utility model provides a testing device for a measurement-while-drilling (MWD) instrument, including a simulated MWD instrument signal unit 2 and a simulated pulse generator speed signal unit 3, as well as a power supply unit 1 that supplies power to the simulated MWD instrument signal unit 2 and the simulated pulse generator speed signal unit 3. The MWD instrument signal output by the simulated pulse generator speed signal unit 3 is sent to the simulated MWD instrument signal unit 2 via the MWD instrument 4.

[0007] Furthermore, the power supply unit includes a switching power supply and a common-mode choke Z1; the L, N, and G terminals are respectively connected to the live wire, neutral wire, and ground wire of the external power supply; the two ends of capacitor C1 are respectively connected across the L and N terminals; the L terminal is connected to one end of the first set of coils of the common-mode choke Z1, and the N terminal is connected to one end of the second set of coils of the common-mode choke Z1; the other end of the first set of coils of the common-mode choke Z1 is connected to one end of capacitor C4 and capacitor C2 and then connected to the switching power supply; the other ends of the second set of coils of the common-mode choke Z1 are both connected to the other end of capacitor C4 and one end of capacitor C3 and then connected to the switching power supply; the other end of capacitor C2 is connected to the other end of capacitor C3 and connected to the ground wire G terminal of the external power supply.

[0008] Furthermore, the power supply unit also includes chokes Z2, Z3, and Z4; one end of the 5V DC output from the switching power supply is connected to one end of capacitor C5 and simultaneously to one end of choke Z2, with the other end of capacitor C5 grounded; the other end of choke Z2 is connected to one end of capacitor C8 and outputs 5V DC, with the other end of capacitor C8 grounded; one end of the 10V DC output from the switching power supply is connected to one end of capacitor C6 and simultaneously to one end of choke Z3, with the other end of capacitor C6 grounded; and the choke Z4... The other end is connected to one end of capacitor C9 and outputs 10V DC power. The other end of capacitor C9 is grounded. One end of the 24V DC power output from the switching power supply is connected to one end of capacitor C7 and one end of choke Z4. The other end of capacitor C7 is grounded. The other end of choke Z4 is connected to one end of capacitor C10 and outputs 24V DC power. The other end of capacitor C10 is grounded. The grounded ends of capacitors C5, C6, C7, C8, C9, and C10 are connected to the ground of the switching power supply.

[0009] Furthermore, the simulated measurement-while-drilling (MWD) signal unit 2 includes a chip U1, a field-effect transistor (FET) Q1, a transistor Q2, a transistor Q3, and a relay K1. Pin 3 of the chip U1 is connected to the mud pulse generator control signal output terminal of the MWD instrument, and pin 4 of the chip U1 is connected to the base of the transistor Q3. The emitter of the transistor Q3 and pin 7 of the chip U1 are both grounded. The collector of the transistor Q3 is connected to one end of a resistor R20, and the other end of R20 is connected to the gate of the FET Q1. The source of the FET Q1 is connected to a 5-volt power supply, and a resistor R19 is connected between the source and gate of the FET Q1. The drain of the FET Q1 is connected to the base of the transistor Q2, and is also connected to one end of a resistor R18 and one end of a diode D2. The other ends of the resistor R18 and the other ends of the diode D2 are both connected to the emitter of the transistor Q2, and the emitter of the transistor Q2 is then connected to ground.

[0010] The collector of transistor Q2 is connected to one end of the stationary contact of relay K1 coil. The other stationary contact of relay K1 coil is connected to one end of resistor R17. The other end of resistor R17 is connected to one end of diode D1. The other end of diode D1 is connected to power supply 24V. One end of diode D1 is also connected to one end of capacitor C11 and capacitor C12. The other ends of capacitor C11 and capacitor C12 are grounded.

[0011] Furthermore, the simulated measurement-while-drilling (MWD) signal unit 2 also includes a pressure sensor K2. One end of the moving contact of relay K1 is connected to one end of resistor R15, and the other end of the moving contact of relay K1 is connected to the other end of resistor R15 and one end of resistor R16. The other end of resistor R16 is connected to one end of pressure sensor K2. The other end of pressure sensor K2 outputs a simulated mud pulse generator signal, which is then transmitted to the MWD instrument.

[0012] Furthermore, the analog pulse generator speed signal unit 3 includes a chip U2 and a transistor Q4. Pin 8 of chip U2 is connected to a 5V power supply, and is also connected to one end of capacitor C12 and resistor R7. The other end of capacitor C12 is connected to ground. The other end of resistor R7 is connected to pin 7 of chip U2, and is also connected to one end of adjustable resistor R8. The other end of adjustable resistor R8 is connected to one end of resistor R9. The other end of resistor R9 is connected to pins 2 and 6 of chip U2, and is also connected to one end of capacitor C13. The other end of capacitor C13 is connected to ground. Pin 5 of chip U2 is connected to one end of capacitor C14, and the other end of capacitor C14 is connected to ground.

[0013] Furthermore, pin 3 of chip U2 is connected to one end of resistors R11 and R10, the other end of resistor R10 is connected to a 5V power supply, the other end of resistor R11 is connected to the base of transistor Q4, and is also connected to one end of resistor R12; the collector of transistor Q4 is connected to one end of resistors R13 and R14, the other end of resistor R13 is connected to a 10V power supply, and the other end of resistor R14 outputs the rotor speed signal of the simulated mud pulse generator, which is connected to the drilling measurement instrument.

[0014] Furthermore, capacitors C1 and C4 are 0.1μF to 0.47μF, and capacitors C2 and C3 are 1000μF to 4700μF.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1) By adopting a simulated measurement-while-drilling (MWD) signal unit, the working status of the MWD instrument can be tested on the ground, avoiding the technical defect that the MWD instrument must be run out of the casing before testing can be performed, and improving the success rate of the MWD instrument going down into the well in one go.

[0017] 2) Filtering circuits were added before and after the switching power supply, which not only prevented external power interference from invading the switching power supply and causing malfunctions, but also eliminated power supply noise, stabilized the power supply output, and improved the accuracy of analog signals.

[0018] 3) By using a simulated pulse generator speed signal unit, the parameters measured by the measurement while drilling instrument are obtained, and it is determined whether the measurement while drilling instrument can measure the rotor speed of the mud pulse generator under actual working conditions. This solves the technical defect that the ground measurement while drilling instrument cannot test the turbine engine speed parameters. Attached Figure Description

[0019] Figure 1 This is a structural block diagram of the testing device for a drilling measurement instrument according to this utility model;

[0020] Figure 2 for Figure 1 Circuit diagram of the power supply unit;

[0021] Figure 3 for Figure 1 Circuit diagram of the signal unit of the analog measurement-while-drilling instrument;

[0022] Figure 4 for Figure 1 Circuit diagram of the speed signal unit of the analog pulse generator. Detailed Implementation

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

[0024] like Figure 1The diagram shows a testing device for a measurement-while-drilling (MWD) instrument, comprising three parts: a simulated MWD signal unit 2, a simulated pulse generator speed signal unit 3, and a power supply unit 1 that supplies power to both units. The output of the simulated pulse generator speed signal unit is recorded by the MWD instrument 4, forming part of the MWD signal, which is then sent to the simulated MWD signal unit 2 to reconstruct the downhole mud pressure signal. This signal is then transmitted to surface equipment for reconstruction, yielding signals such as wellbore inclination, azimuth, tool face angle, and pulse generator speed, thereby determining the MWD instrument's operating status.

[0025] like Figure 2 The power supply unit 1 shown includes a switching power supply, common-mode chokes Z1, Z2, Z3, and Z4. One end of the 5V DC output from the switching power supply is connected to one end of capacitor C5 and simultaneously to one end of choke Z2. The other end of capacitor C5 is grounded. The other end of choke Z2 is connected to one end of capacitor C8 and outputs 5V DC. The other end of capacitor C8 is grounded. One end of the 10V DC output from the switching power supply is connected to one end of capacitor C6 and simultaneously to one end of choke Z3. The other end of capacitor C6 is grounded. The other end of the choke Z3 is connected to one end of the capacitor C9 and outputs 10V DC power. The other end of the capacitor C9 is grounded. One end of the 24V DC power output from the switching power supply is connected to one end of the capacitor C7 and one end of the choke Z4. The other end of the capacitor C7 is grounded. The other end of the choke Z4 is connected to one end of the capacitor C10 and outputs 24V DC power. The other end of the capacitor C10 is grounded. The capacitors C5, C6, C7, C8, C9, and C10 are grounded and connected to the ground of the switching power supply.

[0026] Terminals L, N, and G are connected to the live, neutral, and ground wires of the external power supply, respectively. Capacitor C1 is connected across terminals L and N to reduce the impact of high-frequency pulses from the external power supply on the device's power supply. Terminal L is connected to one end of the first set of coils in common-mode choke Z1, and terminal N is connected to one end of the second set of coils in common-mode choke Z1. The other end of the first set of coils in common-mode choke Z1 is connected to one end of capacitors C4 and C2 and then connected to the switching power supply. The other ends of the second set of coils in common-mode choke Z1 are connected to the other end of capacitor C4 and one end of capacitor C3 and then connected to the switching power supply. The other end of capacitor C2 is connected to the other end of capacitor C3 and then to the ground wire G of the external power supply. Through capacitors C1, C2, and C3, and common-mode choke Z1, interference is suppressed from the external power supply, resulting in a relatively clean power supply for use as the input power supply of the switching power supply.

[0027] Filtering circuits were added before and after the switching power supply to prevent external interference from causing malfunctions and to eliminate power supply noise, thus stabilizing the power output. Specifically, multiple filters were added at the input of the switching power supply. Capacitors C1 and C4, with capacitance values ​​ranging from 0.1μF to 0.47μF, eliminated high-frequency interference; capacitors C2 and C3, with capacitance values ​​ranging from 1000μF to 4700μF, eliminated low-frequency interference; and Z1, a common-mode choke, eliminated external electromagnetic interference signals. At the output of the switching power supply, a passive LC filter composed of inductors and capacitors was used to filter out multiple harmonics in the power supply, ultimately outputting three sets of clean DC power: 5V, 10V, and 24V.

[0028] like Figure 3 The simulated measurement-while-drilling (MWD) signal unit 2 includes a chip U1 (model 54HC08), a field-effect transistor Q1, a transistor Q2, a transistor Q3, a relay K1, and a pressure sensor K2. Pin 3 (terminal A) of chip U1 is connected to the mud pulse generator control signal output terminal of the MWD instrument, and pin 4 of chip U1 is connected to the base of transistor Q3, meaning pin 4 of chip U1 outputs a signal controlling the on / off state of transistor Q3. The emitter of transistor Q3 and terminal 7 of chip U1 are both grounded. The collector of transistor Q1 is connected to one end of resistor R20, and the other end of R20 is connected to the gate of transistor Q1. The source (B terminal) of transistor Q1 is connected to a 5V power supply, and resistor R19 is connected between the source and gate of transistor Q1. The drain of transistor Q1 is connected to the base of transistor Q2, and is also connected to one end of resistor R18 and one end of diode D2. The other ends of resistor R18 and diode D2 are both connected to the emitter of transistor Q2, and the emitter of transistor Q2 is then connected to ground.

[0029] The collector of transistor Q2 is connected to one end of the stationary contact of relay K1 coil. The other stationary contact of relay K1 coil is connected to one end of resistor R17. The other end of resistor R17 is connected to one end of diode D1. The other end of diode D1 (i.e., the E end) is connected to the 24V power supply. One end of diode D1 is also connected to one end of capacitors C11 and C12. The other ends of capacitors C11 and C12 are grounded.

[0030] One end of the moving contact of relay K1 is connected to one end of resistor R15 (i.e., end D), and the other end of the moving contact of relay K1 is connected to the other end of resistor R15, and also to one end of resistor R16. The other end of resistor R16 is connected to one end of pressure sensor K2. The output terminal (i.e., end C) of pressure sensor K2 outputs a simulated mud pulse generator signal, which is then sent to the measurement while drilling instrument.

[0031] Pin 3 of chip U1 receives the control signal from the mud pulse generator output by the measurement-while-drilling instrument, while pin 4 of chip U1 outputs the control signal for transistor Q3. When the signal is high, transistor Q3 is on, and the base voltages of transistors Q1 and Q2 are low, both in the off state, and relay K1 is normally open. When the signal is low, transistor Q3 is off, and the base voltages of transistors Q1 and Q2 are high, both in the on state. The 24V power supply is connected to ground through diode D1, resistor R17, relay K1, and transistor Q2, and relay K1 is normally closed. After the relay completes one opening and closing cycle, a jumping current signal is generated on resistor R16. This current acts on mud pressure sensor K2, which outputs a simulated mud pulse generator signal. The mud pulse generator output signal is sent from terminal C to the measurement-while-drilling (MWD) instrument for processing, thus obtaining the parameters measured by the MWD instrument. This enables the testing of the MWD instrument's working status on the ground, avoiding the technical defect that the MWD instrument must be run out of the casing before testing, and improving the success rate of the MWD instrument's first run into the well.

[0032] like Figure 4 The simulated pulse generator speed signal unit 3 shown includes a chip U2 (model LM555) and a transistor Q4. Pin 8 of chip U2 is connected to a 5V power supply, and also to one end of capacitor C12 and resistor R7. The other end of capacitor C12 is connected to ground. The other end of resistor R7 is connected to pin 7 of chip U2, and also to one end of adjustable resistor R8. The other end of adjustable resistor R8 is connected to one end of resistor R9. The other end of resistor R9 is connected to pins 2 and 6 of chip U2, and also to one end of capacitor C13. The other end of capacitor C13 is connected to ground. Pin 5 of chip U2 is connected to one end of capacitor C14. The other end of capacitor C14 is connected to ground.

[0033] Pin 3 of chip U2 is connected to one end of resistors R11 and R10. The other end of resistor R10 is connected to a 5V power supply. The other end of resistor R11 is connected to the base of transistor Q4 and also to one end of resistor R12. The collector of transistor Q4 is connected to one end of resistors R13 and R14. The other end of resistor R13 is connected to a 10V power supply. The other end of resistor R14 outputs the rotor speed signal of the simulated mud pulse generator.

[0034] A multivibrator circuit composed of chip U2, R7, R9, R8, C12, and C13 is used to adjust the output frequency through adjustable resistor R8 (which can meet the test requirements of turbine generator rotor speed from 1000 r / min to 4000 r / min). The simulated mud pulse generator signal is output from the three corners of U2, and then the rotor speed signal of the simulated mud pulse generator signal unit is restored by transistor Q4. The signal is then input to the measurement while drilling instrument for processing to obtain the parameters measured by the measurement while drilling instrument, and to determine whether the measurement while drilling instrument can measure the rotor speed of the mud pulse generator under actual working conditions.

Claims

1. A testing device for a measurement-while-drilling instrument, characterized in that: It includes a simulated measurement-while-drilling (MWD) signal unit (2) and a simulated pulse generator speed signal unit (3), as well as a power supply unit (1) that supplies power to the simulated MWD signal unit (2) and the simulated pulse generator speed signal unit (3). The MWD signal output by the simulated pulse generator speed signal unit (3) is sent to the simulated MWD signal unit (2) via the MWD instrument (4).

2. The testing device for a measurement-while-drilling instrument according to claim 1, characterized in that: The power supply unit (1) includes a switching power supply and a common mode choke Z1; the L, N, and G terminals are respectively connected to the live wire, neutral wire, and ground wire of the external power supply; the two ends of the capacitor C1 are respectively connected between the L and N terminals; the L terminal is connected to one end of the first set of coils of the common mode choke Z1; the N terminal is connected to one end of the second set of coils of the common mode choke Z1; the other end of the first set of coils of the common mode choke Z1 is connected to one end of capacitor C4 and capacitor C2 and then connected to the switching power supply; the other ends of the second set of coils of the common mode choke Z1 are connected to the other end of capacitor C4 and one end of capacitor C3 and then connected to the switching power supply; the other end of capacitor C2 is connected to the other end of capacitor C3 and connected to the ground wire G terminal of the external power supply.

3. The testing device for a measurement-while-drilling instrument according to claim 2, characterized in that: The power supply unit (1) also includes chokes Z2, Z3, and Z4; one end of the 5V DC output from the switching power supply is connected to one end of capacitor C5 and simultaneously to one end of choke Z2, the other end of capacitor C5 is grounded, and the other end of choke Z2 is connected to one end of capacitor C8 and outputs 5V DC, the other end of capacitor C8 is grounded; one end of the 10V DC output from the switching power supply is connected to one end of capacitor C6 and simultaneously to one end of choke Z3, the other end of capacitor C6 is grounded, and choke Z4 is connected to one end of capacitor C6 and simultaneously to one end of choke Z4, the other end of choke Z5 is grounded, and choke Z4 is connected to one end of capacitor C6 and simultaneously to one end of choke Z4, the other end of capacitor C6 is grounded, and choke Z4 is connected to one end of capacitor C5 and simultaneously to one end of choke Z4, the other end of capacitor C5 is grounded, and choke Z4 is connected to one end of capacitor C6 and simultaneously to one end of choke Z4, the other end of capacitor C5 is grounded, and choke Z4 is connected to one end of capacitor C6 and simultaneously to one end of choke Z4, the other end of capacitor C5 is grounded, and choke Z4 is connected to one end of capacitor C6 and simultaneously to one end of choke Z4, the other end of capacitor C5 is grounded, and choke Z4 is grounded, the other end of capacitor C6 ... The other end of capacitor 3 is connected to one end of capacitor C9 and outputs 10V DC power. The other end of capacitor C9 is grounded. One end of the 24V DC power output from the switching power supply is connected to one end of capacitor C7 and one end of choke Z4. The other end of capacitor C7 is grounded. The other end of choke Z4 is connected to one end of capacitor C10 and outputs 24V DC power. The other end of capacitor C10 is grounded. Capacitors C5, C6, C7, C8, C9, and C10 are grounded and connected to the ground of the switching power supply.

4. The testing device for a measurement-while-drilling instrument according to claim 1, characterized in that: The simulated measurement-while-drilling (MWD) signal unit (2) includes a chip U1, a field-effect transistor Q1, a transistor Q2, a transistor Q3, and a relay K1; pin 3 of chip U1 is connected to the mud pulse generator signal output terminal of the MWD instrument, and pin 4 of chip U1 is connected to the base of transistor Q3; the emitter of transistor Q3 and pin 7 of chip U1 are both grounded, the collector of transistor Q3 is connected to one end of resistor R20, and the other end of R20 is connected to the gate of field-effect transistor Q1; the source of field-effect transistor Q1 is connected to a 5V power supply, and resistor R19 is connected between the source and gate of field-effect transistor Q1; the drain of field-effect transistor Q1 is connected to the base of transistor Q2, and is also connected to one end of resistor R18 and one end of diode D2, and the other end of resistor R18 and the other end of diode D2 are both connected to the emitter of transistor Q2, and the emitter of transistor Q2 is then connected to ground; The collector of transistor Q2 is connected to one end of the stationary contact of relay K1 coil. The other end of the stationary contact of relay K1 coil is connected to one end of resistor R17. The other end of resistor R17 is connected to one end of diode D1. The other end of diode D1 is connected to the 24V power supply. One end of diode D1 is also connected to one end of capacitors C11 and C12. The other ends of capacitors C11 and C12 are grounded.

5. The testing apparatus for a measurement-while-drilling instrument according to claim 4, characterized in that: The simulated measurement-while-drilling instrument signal unit (2) also includes a pressure sensor K2. One end of the moving contact of the relay K1 is connected to one end of the resistor R15, and the other end of the moving contact of the relay K1 is connected to the other end of the resistor R15 and one end of the resistor R16. The other end of the resistor R16 is connected to one end of the pressure sensor K2. The output end of the pressure sensor K2 outputs a simulated mud pulse generator signal, which is then transmitted to the measurement-while-drilling instrument.

6. The testing apparatus for a measurement-while-drilling instrument according to claim 1, characterized in that: The analog pulse generator speed signal unit (3) includes a chip U2 and a transistor Q4. Pin 8 of chip U2 is connected to a 5V power supply and is also connected to one end of capacitor C12 and resistor R7. The other end of capacitor C12 is connected to ground. The other end of resistor R7 is connected to pin 7 of chip U2 and is also connected to one end of adjustable resistor R8. The other end of adjustable resistor R8 is connected to one end of resistor R9. The other end of resistor R9 is connected to pins 2 and 6 of chip U2 and is also connected to one end of capacitor C13. The other end of capacitor C13 is connected to ground. Pin 5 of chip U2 is connected to one end of capacitor C14. The other end of capacitor C14 is connected to ground.

7. The testing apparatus for a measurement-while-drilling instrument according to claim 6, characterized in that: Pin 3 of chip U2 is connected to one end of resistors R11 and R10. The other end of resistor R10 is connected to a 5V power supply. The other end of resistor R11 is connected to the base of transistor Q4 and also to one end of resistor R12. The collector of transistor Q4 is connected to one end of resistors R13 and R14. The other end of resistor R13 is connected to a 10V power supply. The other end of resistor R14 outputs the rotor speed signal of the simulated mud pulse generator.

8. The testing apparatus for a measurement-while-drilling instrument according to claim 2, characterized in that: The capacitors C1 and C4 are 0.1µF to 0.47µF, and the capacitors C2 and C3 are 1000µF to 4700µF.

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