Magnetic levitation type logging while drilling sub

Abstract

The application discloses a magnetic suspension type logging while drilling short section and belongs to the technical field of oil and gas exploration and development equipment. The application comprises an execution module, a logging module and a power management module. The execution module is used for generating a magnetic field which can suspend the logging short section. The logging module is used for collecting, receiving, transmitting and storing logging data and controlling the magnetic field. The power management module is used for supplying power to the above-mentioned parts and controlling the magnetic field as an actuator. The application can avoid the logging short section from contacting the drill pipe, greatly relieve the influence of vibration on the logging short section and improve the service life of the logging short section. The application can also complete the dynamic position adjustment of the logging short section inside the drill pipe, keep the logging short section and the drill pipe relatively static and keep the logging short section stable for logging operation.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of magnetic levitation while drilling logging sub, belong to oil and gas exploration and development equipment technical field. BACKGROUND

[0002] Logging sub as the essential tool of oil exploration and development, for logging operation in the process of drilling or tripping in. It can realize real-time or near real-time data acquisition while drilling, help staff to reconstruct formation geological model, so as to better understand the formation oil situation.

[0003] The application of multiple sensors in logging sub makes it realize real-time measurement of formation data while drilling, improves the efficiency of logging, and provides valuable data support for the development of complex well conditions and special formations. However, the current logging sub inevitably causes contact between the sub and the drill pipe during installation, which brings vibration and impact to the logging sub during drilling operation, affecting the performance of the sensor in the logging sub, and bringing risk to the actual logging. SUMMARY

[0004] The purpose of the present application is to provide a kind of magnetic levitation while drilling logging sub. To solve the problem of vibration and impact affecting logging performance of logging sub in the prior art.

[0005] The technical scheme of the present application: a kind of magnetic levitation while drilling logging sub, comprising:

[0006] An execution module for generating a magnetic field that can suspend the logging sub;

[0007] A logging module for collecting, receiving, transmitting, storing logging data and controlling magnetic field;

[0008] A power management module for powering the above-mentioned parts, and as an actuator to control the magnetic field.

[0009] In the foregoing magnetic levitation while drilling logging sub, the execution module includes drill pipe electromagnet and sub electromagnet, and the sub electromagnet is placed on the outer wall of the logging sub, and the drill pipe electromagnet is placed on the inner wall of the drill pipe.

[0010] In the foregoing magnetic levitation while drilling logging sub, the execution module further includes drill pipe electromagnet arranged between the inner wall of the drill pipe below the logging sub, and sub electromagnet arranged at the bottom of the logging sub.

[0011] In the foregoing magnetic levitation while drilling logging sub, the execution module further includes drill pipe magnetic shielding layer and sub magnetic shielding layer, wherein the drill pipe magnetic shielding layer is arranged between the drill pipe electromagnet and the drill pipe, and the sub magnetic shielding layer is arranged between the sub electromagnet and the logging sub.

[0012] The logging module comprises a main control unit, a storage unit and a sensor unit, the sensor unit is used for collecting logging data, the main control unit is used for receiving and transmitting logging data and controlling a magnetic field, and the storage unit is used for storing logging data.

[0013] In the magnetic levitation logging short section of the preceding, the sensor unit comprises a Hall sensor, which is placed at the center of the coil of the short section electromagnet, and is used for measuring the relative displacement between the short section and the drill pipe.

[0014] In the magnetic levitation logging short section of the preceding, the main control unit judges the position change of the logging short section according to the relative displacement data collected by the Hall sensor, and correspondingly controls the power management module to adjust the supply current of the electromagnet in a certain area, so as to realize real-time position adjustment of the logging short section.

[0015] In the magnetic levitation logging short section of the preceding, the power management module drives the drill pipe electromagnet and the short section electromagnet to generate a magnetic field through the output current, so that the logging short section can be suspended in the drill pipe.

[0016] In the magnetic levitation logging short section of the preceding, the power management module and the logging module jointly constitute the logging short section, and the power management module is arranged at the upper half of the logging short section.

[0017] The present application has the following advantages compared with the prior art:

[0018] 1. The logging short section can avoid contacting the drill pipe, greatly alleviating the influence of vibration on the logging short section, and improving the service life of the logging short section.

[0019] 2. The dynamic position adjustment of the logging short section in the drill pipe can be completed, the logging short section and the drill pipe can be kept relatively static, and the logging short section can stably perform logging operation. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a functional module schematic diagram of the magnetic levitation logging short section of the present application;

[0021] Figure 2 It is a front view cross-sectional schematic diagram of the magnetic levitation logging short section of the present application;

[0022] Figure 3 It is a top view cross-sectional schematic diagram of the magnetic levitation logging short section of the present application;

[0023] Figure 4 It is a front view cross-sectional schematic diagram of the magnetic levitation logging short section of the present application when it is in a curved section;

[0024] Figure 5A schematic diagram of a front view profile of the magnetic suspension logging short section of the present application when in a horizontal section;

[0025] Figure 6 A schematic diagram of force analysis of the magnetic suspension logging short section of the present application when in a vertical section;

[0026] Figure 7 A schematic diagram of force analysis of the magnetic suspension logging short section of the present application when in a curved section;

[0027] Figure 8 A schematic diagram of force analysis of the magnetic suspension logging short section of the present application when in a horizontal section.

[0028] Reference signs: 1-drill pipe, 2-drill pipe magnetic shielding layer, 3-drill pipe electromagnet, 4-short section electromagnet, 5-short section magnetic shielding layer, 6-logging short section. DETAILED DESCRIPTION

[0029] The present application is further described below in conjunction with the accompanying drawings and examples, but is not limited to the basis of the present application.

[0030] Figure 1 A schematic diagram of the composition of a magnetic suspension logging short section while drilling provided by the embodiment of the present application. The embodiment of the present application provides a magnetic suspension logging short section while drilling, comprising:

[0031] An execution module for generating a magnetic field that can suspend the logging short section;

[0032] A logging module for logging data acquisition, reception, transmission, storage and magnetic field control;

[0033] A power management module for powering the above-mentioned parts, and as an actuator to control the magnetic field.

[0034] The execution module includes drill pipe electromagnet 3 and short section electromagnet 4, the logging module includes a master control unit, a sensor unit and a storage unit, the power management module powers the execution module and the logging module, and the power management module and the logging module together constitute the logging short section.

[0035] Exemplarily, Figure 2 And Figure 3 A schematic diagram of a front view and a top view profile of the magnetic suspension logging short section while drilling and its installation method provided by the embodiment of the present application. The logging short section 6 is suspended inside the drill pipe 1 by magnetic suspension technology, and the magnetic suspension technology interacts through the drill pipe electromagnet 3 and the short section electromagnet 4.

[0036] The execution module further comprises a drill pipe magnetic shielding layer 2 and a short section magnetic shielding layer 5, wherein the drill pipe magnetic shielding layer 2 is arranged between the drill pipe electromagnet 3 and the drill pipe 1, and the short section magnetic shielding layer 5 is arranged between the short section electromagnet 4 and the logging short section 6, and the drill pipe magnetic shielding layer 2 and the short section magnetic shielding layer 5 are used to prevent the execution module from generating magnetic interference on the drill pipe 1 and other parts of the logging short section 6.

[0037] The execution module further comprises the drill pipe electromagnet 3 arranged between the inner walls of the drill pipe 1 below the logging short section 6 and the short section electromagnet 4 arranged at the bottom of the logging short section 6, and the drill pipe electromagnet 3 and the short section electromagnet 4 arranged at this position are used to prevent the logging short section 6 from falling accidentally in addition to generating a magnetic field.

[0038] In the embodiment of the present application, Figure 2 、 4 , 5 is a schematic diagram of the position of the magnetic levitation type logging short section and the installation mode thereof in the embodiment of the present application in the vertical section of the logging short section while drilling, and the relative positions of the drill pipe 1 and the logging short section 6 to the ground are different in different drilling processes, so the magnetic field in which the logging short section 6 is located needs to be adjusted constantly according to the motion trajectory of the drill pipe 1.

[0039] In the embodiment of the present application, the sensor unit of the logging module in the logging short section 6 comprises a gyroscope, and the position of the drill pipe 1 in the logging process can be known. The main control unit sends different current output commands to the power management module according to the position of the drill pipe 1, so as to adjust the magnetic field strength of each part of the drill pipe electromagnet 3 and the short section electromagnet 4 in the execution module, and complete the real-time position adjustment of the logging short section 6 in the logging process.

[0040] Further, the sensor unit of the logging module in the logging short section 6 further comprises a Hall sensor, which is used to obtain the relative displacement between the logging short section 6 and the drill pipe 1. The main control unit judges the motion trend of the logging short section 6 in the drill pipe according to the relative displacement data transmitted by the Hall sensor, and the main control unit needs to send a command to the power management module to adjust the power supply current of a certain part of the electromagnet, so as to make the logging short section 6 be in a static state relative to the drill pipe 1 by adjusting the magnetic field of the electromagnet, and complete the real-time dynamic position adjustment of the logging short section 6 in the logging process, so that the logging short section 6 can better follow the drill pipe 1 to perform logging operations.

[0041] Exemplarily, Figure 6 The force analysis schematic diagram of the magnetic levitation type logging short section provided in the embodiment of the present application in the vertical section is shown in the figure. When vertical drilling, the logging short section 6 has a downward force under the action of gravity Therefore, the drill pipe electromagnet 3 below the logging short section 6 needs to generate an upward electromagnetic force on the logging short section 6 to make the logging sub 6 keep force balance in the vertical direction. In order to make the logging sub 6 keep force balance in the horizontal direction, the drill pipe electromagnet 3 on the left side of the logging sub 6 generates an electromagnetic force to the left of the logging sub 6, and the drill pipe electromagnet 3 on the right side of the logging sub 6 generates an electromagnetic force to the right of the logging sub 6 , . .

[0042] Figure 7 The force analysis schematic diagram of the magnetic suspension logging sub provided by the embodiment of the present application in the curved section is shown in FIG. 6. It is assumed that the angle between the drill pipe 1 and the stratum is In order to keep force balance, the relationship between the electromagnetic force and the gravity is: , .

[0043] Figure 8 The force analysis schematic diagram of the magnetic suspension logging sub provided by the embodiment of the present application in the horizontal section is shown in FIG. 7. In order to keep force balance, the relationship between the electromagnetic force and the gravity is: , .

[0044] The electromagnetic force between the two electromagnets In other conditions, in order to realize the force balance described above, the main control unit needs to control the power supply current of each part of the drill pipe electromagnet 3 and the logging sub electromagnet 4 to keep the force balance state. Moreover, when the Hall sensor detects that the logging sub 6 has a position deviation, the main control unit also needs to adjust the power supply current of each part accordingly. In the whole logging operation process, the dynamic adjustment of the main control unit to the power supply circuit of each electromagnet is carried out through the adaptive control mode, which can adjust the controller parameters in real time according to the system state, so that the system can adapt to changes.

[0045] Exemplarily, in order to avoid the magnetic field generated by the drill pipe electromagnet 3 and the logging sub electromagnet 4 from affecting the electromagnetic logging result of the logging sub 6, the drill pipe electromagnet 3 and the logging sub electromagnet 4 generate high-frequency electromagnetic fields.

[0046] Although the preferred embodiments of the present application have been described, those skilled in the art who understand the basic creative concept can make other changes and modifications to the embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0047] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A magnetically levitated logging-while-drilling sub, characterized by: It comprises: an execution module for generating a magnetic field that can suspend the logging sub; a logging module for logging data acquisition, receiving, transmission, storage and magnetic field control; a power management module for powering the above modules, and as an actuator to control the magnetic field; The execution module includes drill pipe electromagnet (3) and sub electromagnet (4), sub electromagnet (4) is placed in the outer wall of logging sub (6), drill pipe electromagnet (3) is placed in the inner wall of drill pipe (1); The output current of the power management module drives the drill pipe electromagnet (3) and the sub electromagnet (4) to generate a magnetic field, so that the logging sub (6) is suspended in the drill pipe (1).

2. The magnetically levitated logging while drilling sub according to claim 1, characterized in that The execution module further comprises drill pipe electromagnet (3) arranged between the inner wall of drill pipe (1) below logging sub (6), and sub electromagnet (4) arranged at the bottom of logging sub (6).

3. The magnetically levitated logging while drilling sub according to claim 1, characterized in that: The execution module further comprises drill pipe magnetic shielding layer (2) and sub magnetic shielding layer (5), wherein drill pipe magnetic shielding layer (2) is arranged between drill pipe electromagnet (3) and drill pipe (1), and sub magnetic shielding layer (5) is arranged between sub electromagnet (4) and logging sub (6).

4. The magnetically levitated logging while drilling sub according to claim 1, characterized in that: The logging module comprises a main control unit, a storage unit and a sensor unit, the sensor unit is used for collecting logging data, the main control unit is used for receiving and transmitting logging data and controlling the magnetic field, and the storage unit is used for storing logging data.

5. The magnetically levitated logging-on-the-fly sub according to claim 4, characterized in that: The sensor unit comprises a Hall sensor, which is placed at the center of the coil of the sub electromagnet (4), and is used for measuring the relative displacement between the logging sub (6) and the drill pipe (1).

6. The magnetically levitated logging-in-the-hole sub of claim 5, wherein: The main control unit judges the position change of the logging sub (6) according to the relative displacement data collected by the Hall sensor, and correspondingly controls the power management module to adjust the supply current of the electromagnet in a certain area, so as to realize the real-time position adjustment of the logging sub (6).

7. The magnetically levitated logging-in-the-hole sub of claim 1, wherein: The power management module and the logging module jointly constitute the logging sub (6), and the power management module is placed in the upper half of the logging sub (6).

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