A short joint type while-drilling inclination measuring device

Abstract

This invention relates to the field of underground energy exploration technology, such as oil and natural gas, and particularly to a short-section type measuring-while-drilling (MWD) device to alleviate the problems of time-consuming and labor-intensive on-site installation, measurement accuracy affected by the centering of the probe tube, and poor scalability of existing probe-type MWD tools. The device includes a pulse section and a measurement section; the pulse section and the measurement section are threadedly connected; a pulse generator is installed inside the pulse section to transmit signals to the surface; the measurement section is located at the lower part of the pulse section and is used to install a mud generator, measurement, and signal processing system. Multiple measurement chambers are installed inside the outer wall of the measurement section. The measurement system and signal processing system are installed in the measurement chambers, no longer built into the drill collar, making on-site installation more convenient and faster, improving construction efficiency. The measurement chambers have openings connecting to the outside, through which various measuring devices that must be placed inside the drill collar wall, such as vibration and torque sensors, can be adjusted, replaced, or added, enhancing the device's scalability.

Description

Technical Field

[0001] This invention relates to the field of underground energy exploration technology, such as oil and natural gas, and in particular to a short-section drilling measurement device. Background Technology

[0002] Existing downhole measurement-while-drilling tools are mostly of the probe type, with the probe suspended inside the drill collar and connected by a keyway. It is necessary to ensure that the probe is fixed and centered, which is time-consuming and labor-intensive to install on site. If the probe is not fixed firmly or is not centered, measurement errors are likely to occur. Since the probe is used for measurement inside the drill string, it will increase pressure loss and has poor expandability. For example, parameters such as vibration and torque cannot be extended for measurement. Summary of the Invention

[0003] This invention provides a short-section type drilling directional measurement device to alleviate the problems of existing probe-type drilling tools, such as time-consuming and labor-intensive on-site installation, measurement accuracy affected by the centering of the probe, and poor expansion performance.

[0004] To alleviate the above-mentioned technical problems, the technical solution provided by the present invention is as follows:

[0005] This invention provides a short-section type measuring-while-drilling device, comprising a pulse short section and a measuring short section;

[0006] The pulse sub and the measuring sub are threaded together.

[0007] A pulse generator is installed inside the pulse subsection, and the pulse generator is used to send signals to the ground.

[0008] The measuring sub is located at the bottom of the pulse sub and is used to mount the measuring equipment.

[0009] Furthermore,

[0010] The measurement section includes the section body, mud generator, wiring compartment, and measurement compartment;

[0011] The mud generator is installed inside the short section;

[0012] The upper end of the mud generator is electrically connected to the pulse generator;

[0013] There is a first liquid passage between the mud generator and the short section body;

[0014] The first liquid channel is connected to the second liquid channel within the pulse subsection;

[0015] A mounting bracket is provided inside the short section body, and the lower end of the mud generator is fixedly connected to the mounting bracket;

[0016] The wiring compartment is located on the side wall of the card slot and is electrically connected to the mud generator;

[0017] The measuring compartment is located at the bottom of the wiring compartment and is electrically connected to the wiring compartment.

[0018] Furthermore,

[0019] The measuring chamber has a cavity.

[0020] Furthermore,

[0021] Multiple measurement chambers are arranged in a ring array along the axis of the short section body.

[0022] Furthermore,

[0023] The measuring chamber is equipped with measuring sensors and control circuits.

[0024] Furthermore,

[0025] The outer wall of the short section body has an opening that communicates with the measurement cabin;

[0026] A baffle is installed at the opening;

[0027] The baffle and opening are detachably connected.

[0028] Furthermore,

[0029] The mounting bracket is equipped with a cable pass hole for electrical connection between the mud generator and the wiring compartment.

[0030] The beneficial effects of the short-section drilling measurement device in this invention are analyzed as follows:

[0031] Compared with existing technologies, this short section has no probe structure, resulting in lower pressure drop and fewer components susceptible to mud erosion, thus improving the overall erosion resistance of the device. The measuring equipment is centrally installed inside the measuring short section chamber, eliminating the need for centering and preventing centering errors. It can be used on-site simply by connecting it to the drill neck, making it convenient and quick. Furthermore, the measuring short section has multiple measuring chambers with openings, each of which can be independently opened and equipped with corresponding measuring devices, enhancing the device's scalability. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present invention, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 A schematic diagram of the structure of the short-section drilling surveying device provided in an embodiment of the present invention.

[0034] icon:

[0035] 100 - Pulse short section; 110 - Pulse generator;

[0036] 200-Measuring section; 210-Section body; 211-Clad seat; 220-Mud generator; 230-Wiring compartment; 240-Measuring compartment; 241-Baffle. Detailed Implementation

[0037] Existing downhole measurement-while-drilling tools are mostly of the probe type, with the probe suspended inside the drill collar and connected by a keyway. It is necessary to ensure that the probe is fixed and centered, which is time-consuming and labor-intensive to install on site. If the probe is not fixed firmly or is not centered, measurement errors are likely to occur. Since the probe is used for measurement inside the drill string, it will increase pressure loss and has poor expandability. For example, parameters such as vibration and torque cannot be extended for measurement.

[0038] In view of this, this solution provides a short-section drilling measurement device to alleviate the above problems.

[0039] This device includes a pulse subsection 100 and a measurement subsection 200;

[0040] The pulse subsection 100 and the measuring subsection 200 are threaded together.

[0041] A pulse generator 110 is provided inside the pulse subsection 100, which is used to send signals to the ground;

[0042] The measuring sub 200 is located at the lower part of the pulse sub 100 and is used to mount measuring equipment.

[0043] Specifically, the measuring section 200 contains a mud generator to power the measuring system and pulse generator. The outer wall of the measuring section has a certain space for installing sensor-type measuring equipment. After the measuring equipment collects relevant data, it transmits the data to the pulse generator 110 via electrical signals. The pulse generator 110 then sends the relevant data to the ground.

[0044] In this scheme, the measurement sub 200 includes the sub body 210, the mud generator 220, the wiring compartment 230, and the measurement compartment 240;

[0045] The mud generator 220 is installed inside the short section body 210;

[0046] The upper end of the mud generator 220 is electrically connected to the pulse generator 110;

[0047] A first liquid passage exists between the mud generator 220 and the short section body 210;

[0048] The first liquid channel is connected to the second liquid channel within the pulse subsection 100;

[0049] The short section body 210 is provided with a retaining seat 211, and the lower end of the mud generator 220 is fixedly connected to the retaining seat 211;

[0050] The wiring compartment 230 is located on the side wall of the card holder 211 and is electrically connected to the mud generator 220;

[0051] The measuring compartment 240 is located at the lower part of the wiring compartment 230 and is electrically connected to the wiring compartment 230.

[0052] Specifically, the mud generator 220 is existing technology. Mud passes through the mud generator 220 along the second liquid channel and the first liquid channel to power the pulse generator 110 and the measuring equipment in the measuring chamber 240. The pulse generator 110 and the mud generator 220 are connected vertically to form a single drill collar, which reduces the number of tools built into the drill string, making it easier to assemble the equipment at the wellhead. Furthermore, with fewer built-in tools, the fluid flows more smoothly, reducing erosion of the equipment.

[0053] In this design, the outer wall of the measurement chamber 240 has a cavity;

[0054] Multiple measurement chambers 240 are arranged in a ring array along the axis of the short section body 210;

[0055] The measuring chamber 240 is equipped with measuring sensors and control circuits;

[0056] The outer wall of the short section body 210 is provided with an opening that communicates with the measurement cabin 240;

[0057] A baffle 241 is provided at the opening;

[0058] The baffle 241 is detachably connected to the opening.

[0059] Specifically, each measuring chamber 240 is set up independently. The measuring chamber 240 can be opened by removing the corresponding baffle 241 to debug the equipment inside the measuring chamber 240. When it is necessary to expand or add measuring instruments, the reserved measuring chamber 240 can be opened to install the corresponding measuring instruments.

[0060] In this design, the card holder 211 is provided with a cable pass hole for electrical connection between the mud generator 220 and the wiring compartment 230.

[0061] This solution has at least the following beneficial effects:

[0062] This solution provides a short-section MWD (Measuring While Drilling) device that effectively solves common problems in probe-type MWD tools, offering significant technical advantages. Traditional probe-type structures require precise probe fixation and centering, making on-site installation time-consuming and labor-intensive. Furthermore, insecure or misaligned probes can easily lead to measurement errors. This solution, however, utilizes a combination of pulse and measurement sections to ensure the stability and high accuracy of the measurement equipment. In addition, the design simplifies installation, eliminating the need for probe centering and preventing errors caused by improper operation, thus improving construction efficiency. The measurement section includes a dedicated measurement chamber for the equipment and uses a pulse generator for data transmission with external devices, enhancing the device's scalability and supporting measurements of various parameters such as vibration and torque, expanding its functional range. Measurement data is transmitted via the pulse generator, ensuring real-time data transmission and accuracy. In summary, this solution not only addresses several pain points in existing technologies but also improves the overall performance and adaptability of the device through optimized design, enhancing the efficiency and accuracy of downhole MWD operations.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A short-section type drilling rig for measuring inclination while drilling, characterized in that: Includes a pulse subsection (100) and a measurement subsection (200); The pulse sub (100) is threadedly connected to the measurement sub (200); The pulse subsection (100) is equipped with a pulse generator (110), which is used to send signals to the ground; The measuring section (200) is located at the lower part of the pulse section (100) and is used to mount measuring equipment.

2. The short-section drilling surveying device according to claim 1, characterized in that: The measurement section (200) includes a section body (210), a mud generator (220), a wiring compartment (230), and a measurement compartment (240); The mud generator (220) is disposed within the short section body (210); The upper end of the mud generator (220) is electrically connected to the pulse generator (110); A first liquid passage exists between the mud generator (220) and the short section body (210); The first liquid channel is connected to the second liquid channel within the pulse segment (100); The short section body (210) is provided with a retaining seat (211), and the lower end of the mud generator (220) is fixedly connected to the retaining seat (211); The wiring compartment (230) is disposed on the side wall of the card holder (211) and is electrically connected to the mud generator (220); The measuring chamber (240) is located at the lower part of the wiring chamber (230) and is electrically connected to the wiring chamber (230).

3. The short-section drilling surveying device according to claim 2, characterized in that: The measuring chamber (240) has a cavity.

4. The short-section drilling surveying device according to claim 3, characterized in that: Multiple of the measurement chambers (240) are arranged in a ring array along the axis of the short section body (210).

5. The short-section drilling measurement device according to claim 4, characterized in that: The measurement chamber (240) is equipped with measurement sensors and control circuits.

6. The short-section drilling surveying device according to claim 5, characterized in that: The outer wall of the short section body (210) is provided with an opening that communicates with the measuring chamber (240); A baffle (241) is provided at the opening; The baffle (241) is detachably connected to the opening.

7. The short-section drilling surveying device according to claim 6, characterized in that: The card holder (211) is provided with a wire hole for electrical connection between the mud generator (220) and the wiring compartment (230).

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