Over-bit measurement while drilling assembly, device and method

Abstract

The invention discloses an over-drill-bit measurement-while-drilling assembly, device and method. A first jacket, a control assembly, a filling assembly and a measuring assembly are mounted on an inner measuring rod in the measuring device; the control assembly, the filling assembly and the measuring assembly are mounted below the first jacket; the first jacket is configured to expand or contract by taking the inner measuring rod as a center; the control assembly controls expansion or contraction of the first clamping sleeve. The filling assembly is used for filling liquid below the expanded first jacket; the measuring assembly at least measures well interior data between the first jacket and the well wall after the first jacket expands and the pouring assembly conducts pouring. According to the measuring device, the technical bottleneck that a traditional logging-while-drilling tool is limited by internal measurement of a drill rod is broken through, and dynamic sealing measurement of an open hole well section behind a drill bit is innovatively achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling equipment, and in particular to a through-drill bit measurement while drilling component, device and method. Background Art

[0002] As an important component of uranium resources, sandstone uranium mines have an irreplaceable strategic position in the nuclear energy industry chain due to their technical advantages such as low mining cost, large resource volume and suitability for in-situ leaching mining.

[0003] In the mining process of sandstone uranium, logging technology is a core means to ensure efficient resource development, optimize mining plans, and reduce environmental risks. However, existing logging technology methods have some technical bottlenecks and deficiencies in practical application, mainly reflected in the lack of accuracy in identifying low-grade uranium ores, the precision measurement of permeability evaluation, and the lack of real-time dynamic detection of in-situ leaching. Through-the-bit logging is a commonly used data acquisition method. It transmits a small-diameter logging instrument through the drill string, passes through a special through-the-hole drill bit and enters the open hole section, thereby achieving rapid and efficient data acquisition. There are two ways to collect through-the-bit logging data: one is real-time transmission through a cable connected to the logging instrument, and the other is to read data through the storage port. However, this method places relatively high demands on the battery of the instrument, and the power supply battery must be able to provide power during continuous operation.

[0004] However, existing measurement technologies using drill bit probes still have certain shortcomings in the detection of sandstone uranium deposits. For example, traditional gamma ray technology is significantly affected by interference from elements such as thorium and potassium, resulting in insufficient sensitivity for detecting low-grade ore bodies with low uranium content, leading to resource waste. The reliance on indirect inversion models such as resistivity and acoustic waves to calculate permeability results in high error rates and cannot meet the requirements for precise design of in-situ leaching fluid injection parameters. Therefore, the design and development of a through-the-drill bit measurement while drilling device and method to achieve accurate detection and coupled analysis of important parameters such as uranium content and permeability is of great significance for the efficient mining of uranium resources. Summary of the Invention

[0005] In view of this, the first aspect of the present invention discloses a through-the-drill-bit measurement while drilling device. The measurement device includes a drill bit, an outer drill rod, and an inner measuring rod; the outer drill rod is connected to the drill bit; the inner measuring rod is deployed in the outer drill rod and is configured to pass through the drill bit along the drilling direction; the inner measuring rod is equipped with a first jacket, a control assembly, a perfusion assembly, and a measurement assembly; the control assembly, the perfusion assembly, and the measurement assembly are installed below the first jacket; the first jacket is configured to expand outward or contract inward with the inner measuring rod as the center; the control assembly is configured to control the expansion or contraction of the first jacket; the perfusion assembly is configured to perfuse liquid below the expanded first jacket; the measurement assembly measures at least first in-well data below the expanded first jacket after the first jacket expands, and second in-well data below the first jacket after the first jacket expands and the perfusion assembly is perfused.

[0006] In the present invention, the inner measuring rod is installed with a fixed jacket; the fixed jacket is installed above the first jacket, and the fixed jacket is used to expand and stabilize the inner measuring rod in the outer drill rod; the control assembly is configured to control the expansion or contraction of the fixed jacket;

[0007] In the present invention, the first jacket is constructed to cover a section of the inner measuring rod; the control component includes a first infusion hole and a first infusion pipeline constructed on the inner measuring rod; the first infusion hole is constructed in the section of the inner measuring rod covered by the first jacket; one end of the first infusion pipeline is connected to the first infusion hole, and the other end passes through the inner measuring rod and is connected to an external infusion device.

[0008] In the present invention, the perfusion assembly includes a second infusion hole and a second infusion pipe configured in the inner measuring rod; the second infusion hole is configured below the section of the inner measuring rod covered by the first jacket; one end of the second infusion pipe is connected to the second infusion hole, and the other end passes through the inner measuring rod and is connected to the infusion device;

[0009] In the present invention, the inner measuring rod is equipped with a main infusion pipeline and a multi-channel solenoid valve; the first infusion pipeline and the second infusion pipeline are respectively connected to the multi-channel solenoid valve; the multi-channel solenoid valve is connected to an external control device via a cable.

[0010] In the present invention, the measuring device includes a delivery rod deployed above the inner measuring rod along the length direction;

[0011] The delivery rod and the inner measuring rod are connected via a release mechanism;

[0012] The cable and the main infusion pipe pass through the delivery rod to connect the infusion device and the control device respectively.

[0013] In the present invention, the main infusion tube, the first infusion tube and the second infusion tube are constructed as embedded flow channels in the inner measuring rod.

[0014] In the present invention, the measuring component at least includes a pressure sensor, a neutron source and a gamma detector.

[0015] And, the second aspect of the present invention discloses a method for measuring while drilling through a drill bit,

[0016] By using the drill bit measurement while drilling device,

[0017] The drilling while drilling measurement method comprises:

[0018] Driving the drill string assembly comprising the outer drill rod and the drill bit to drill into the target formation through external drilling equipment;

[0019] lifting the drill assembly via the drilling equipment;

[0020] Lowering the inner measuring rod along the inner cavity of the outer drill rod;

[0021] When it is determined that the inner measuring rod has passed through the drill bit and reached the target formation, the control component drives the first jacket to expand, and after the first jacket expands, it forms a contact seal with the inner wall of the well;

[0022] perfusing liquid to the outside of the inner measuring rod through the perfusion assembly to form a pressure difference;

[0023] The measuring component is controlled to measure first well data and second well data.

[0024] And, a third aspect of the present invention discloses a through-the-drill measurement while drilling assembly.

[0025] The inner measuring rod is equipped with a first jacket, a control component, a perfusion component and a measuring component;

[0026] The control assembly, the perfusion assembly, and the measurement assembly are installed below the first jacket;

[0027] The first jacket is configured to expand outward or contract inward with the inner measuring rod as the center;

[0028] The control assembly is configured to control the expansion or contraction of the first jacket;

[0029] The perfusion assembly is used to perfuse liquid below the expanded first jacket;

[0030] The measuring component at least measures:

[0031] After the first jacket is expanded, first in-well data below the first jacket expansion is obtained.

[0032] After the first jacket is expanded and the injection assembly is injected, the second wellbore data below the first jacket is obtained.

[0033] And, a fourth aspect of the present invention discloses a through-drilling measurement device,

[0034] The measuring device includes a drill bit, an outer drill rod and an inner measuring rod;

[0035] The outer drill rod is connected to the drill bit;

[0036] The inner measuring rod is disposed inside the outer drill rod, and the inner measuring rod is configured to pass through the drill bit along the drilling direction;

[0037] The inner measuring rod is equipped with a first jacket, a second jacket, a control component, a perfusion component and a measuring component;

[0038] The control component, the perfusion component, and the measurement component are installed between the first jacket and the second jacket;

[0039] The first jacket and the second jacket are respectively configured to expand outward or contract inward with the inner measuring rod as the center;

[0040] The control assembly is configured to control the expansion or contraction of the first jacket and the second jacket;

[0041] The perfusion assembly is used to perfuse liquid onto the exterior of the inner measuring rod;

[0042] The measuring component at least measures:

[0043] After the first jacket is expanded, first in-well data below the first jacket expansion is obtained.

[0044] data in a second well below the first jacket after the first jacket is expanded and the injection assembly is injected;

[0045] The third in-well data between the first jacket and the second jacket after the first jacket and the second jacket are expanded and the injection assembly is injected.

[0046] Compared with the existing technology, the present invention utilizes a jacket to place the measuring assembly in a pressurized environment between the jacket and the wellbore wall after the measuring assembly passes through the drill bit, thereby realizing the permeability acquisition of the target section in the formation under different pressures, and avoiding the need for the existing through-drill measurement technology to repeatedly pull out and drill down to artificially create an artificial environment for data acquisition.

[0047] Other advantages, objects and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be learned from the practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0049] Figure 1 The present invention is a structural schematic diagram of a through-drill bit measurement while drilling device.

[0050] Figure 2 The present invention is a flowchart of a method for measuring while drilling through a drill bit.

[0051] Figure 3 This is a schematic structural diagram of another through-drill bit measurement while drilling device of the present invention.

[0052] The accompanying drawings are marked as follows: 100, outer drill rod; 200, inner measuring rod; 211, first jacket; 212, second jacket; 220, pouring assembly; 230, measuring assembly. DETAILED DESCRIPTION

[0053] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. It should be pointed out that in this application, "axial" specifically refers to the direction along the longitudinal axis of the drill pipe, "radial" is the horizontal direction perpendicular to the axis, and "drilling direction" is the positive direction of the drill bit advancing into the depth of the formation.

[0054] The present invention discloses a through-the-drill bit measurement while drilling device. The measurement device breaks through the technical bottleneck of traditional logging while drilling tools being limited to measurement inside the drill pipe, and innovatively realizes dynamic sealing measurement of the open hole section behind the drill bit.

[0055] The measuring device includes a drill bit, an outer drill rod 100, and an inner measuring rod 200. The drill bit is connected to the front end of the outer drill rod 100 using API standard NC50 threads. The internal structure of the drill bit is provided with an axial through-hole for the inner measuring rod 200 to pass through. The inner wall of the axial through-hole is coated with a 0.3mm thick tungsten carbide wear-resistant layer. The outer drill rod 100 is made of S135 grade steel pipe. The internal structure of the outer drill rod 100 is a hollow channel, and the inner diameter of the hollow channel is larger than the outer diameter of the inner measuring rod 200 to form an annular gap relative to the inner measuring rod 200. The inner measuring rod 200 can be coaxially deployed in the hollow channel of the outer drill rod 100 and can be suspended by a cable and passed through the axial through-hole of the drill bit along the drilling direction by gravity to enter the open hole section; alternatively, the inner measuring rod 200 is moved downward by pumping drilling fluid in the outer drill rod 100.

[0056] Preferably, the drill bit can employ a multi-stage expansion structure. The front section of the drill bit is inlaid with carbide teeth to break hard rock, while the rear section features a guiding bevel to reduce resistance to the inner measuring rod 200's penetration. The surface of the inner measuring rod 200 can be chrome-plated to reduce friction with the inner wall of the outer drill rod 100. A polyetheretherketone (PEEK) bushing is added to the inner wall of the outer drill rod 100, offering a temperature resistance of 250°C and resistance to drilling fluid corrosion, extending its service life.

[0057] In the present invention, Figure 1 It is shown that the inner measuring rod 200 is installed with a first jacket 211, a control component, a perfusion component 220 and a measuring component 230 from top to bottom.

[0058] The first jacket 211 is wrapped around the middle section of the inner measuring rod 200. The material of the first jacket 211 is a nitrile rubber matrix and an aramid fiber braided layer. Therefore, the first jacket 211 can expand outward or contract inward with the inner measuring rod 200 as the center.

[0059] The control assembly includes a first infusion port and a first infusion conduit constructed within the inner measuring rod 200. The first infusion port is located within the section of the inner measuring rod 200 enclosed by the first jacket 211. One end of the first infusion conduit connects to the first infusion port, while the other end passes through the inner measuring rod 200 and connects to an infusion device deployed above ground. This allows the infusion device to inject fluid into the first jacket 211 through the first infusion port and the first infusion port.

[0060] The infusion assembly 220 includes a second infusion port and a second infusion conduit constructed within the inner measuring rod 200. The second infusion port is located below the section of the inner measuring rod 200 covered by the first jacket 211. One end of the second infusion conduit is connected to the second infusion port, while the other end passes through the inner measuring rod 200 and connects to an infusion device. This allows the infusion device to infuse fluids below the first jacket 211 through the second infusion conduit and the second infusion port.

[0061] Furthermore, the internal measuring rod 200 of the present invention can be equipped with a main infusion line and a multi-channel solenoid valve. The first and second infusion lines are each connected to the multi-channel solenoid valve. The multi-channel solenoid valve is connected to an external control device via a cable. Therefore, the external control device controls the multi-channel solenoid valve to select whether the infusion device injects or withdraws liquid from the first or second infusion line.

[0062] Preferably, the main infusion line, the first infusion line, and the second infusion line can all be constructed as embedded channels formed by laser-etched microchannels on the inner measuring rod 200. Thus, the use of embedded channels reduces the structural weaknesses of external tubing, such as damage and breakage. Furthermore, the inner walls of the embedded channels can be coated with polytetrafluoroethylene, reducing the fluid resistance of the perfusion liquid.

[0063] The measuring assembly 230 is installed in the measuring chamber of the inner measuring rod 200 , and a variety of sensors are integrated in the measuring chamber for collecting various well data in the downhole environment.

[0064] For example, the measurement assembly 230 includes a pressure sensor, a neutron source, a neutron detector, a gamma detector, and a processing circuit installed in the measurement assembly 230 .

[0065] The pressure sensor can be used with a range of 0-60MPa and an accuracy of ±0.1% FS. It is used to calculate the permeability of the well below the first jacket 211 after the first jacket 211 is expanded and the perfusion assembly 220 is pressurized by perfusion liquid, and record the pressure decay curve and flow data during the measurement period T. The formula is used. Calculate the permeability, where Q is the flow rate, μ is the fluid viscosity, L is the length of the sealing section, A is the wellbore contact area, and m is the slope of the logarithmic pressure curve.

[0066] The neutron generator emits a neutron flux. The neutron detector and gamma ray detector synchronously collect thermal neutron counts and gamma ray spectrum data, with a sampling interval of ≤10cm.

[0067] The processing circuit is equipped with a neutron signal filter, a neutron signal amplifier and a controller, etc. The processing circuit uses the neutron-gamma multiple regression model C U =a·R γ +b·φ N +c inversion uranium content, where R γ is the gamma count rate, φ N Where a is neutron porosity, and a, b, and c are regression coefficients. This comprehensive interpretation and storage yields data such as uranium content, porosity, and permeability. The data stored in the processing circuit can be accessed by a computer after the inner probe rod is removed. The computer generates a formation parameter profile based on this data, assisting in geological exploration and drilling.

[0068] Preferably, the measuring chamber is encapsulated in a cylindrical shell that is resistant to high pressure (≥70MPa) and high temperature (≥150°C), and the sensors and their arrays are integrated inside. The sensors in the measuring chamber can be arranged in an axial layered layout, and the distance between the neutron generator and the neutron detector is set to 150mm. The distance between the neutron generator and the neutron detector is set to 150mm. The neutron signal filter suppresses fast neutron and epithermal neutron signals through energy spectrum screening, and the neutron signal amplifier amplifies the thermal neutron counting signal to a recognizable threshold. The gamma detector integrates a multi-channel pulse amplitude analyzer, which can strip off the characteristic energy spectrum peaks of uranium, thorium, potassium, etc.

[0069] Based on this, in the present invention, the expansion of first jacket 211 and the pressurization of the perfusion liquid in perfusion assembly 220 create a pressurized liquid environment between the bottom of first jacket 211 and the wellbore wall. The sensors of measurement assembly 230 can measure the first wellbore data under this pressurized environment. Simultaneously, the expansion of first jacket 211 alone creates a normal gas environment between the bottom of first jacket 211 and the wellbore wall. The sensors of measurement assembly 230 can also measure the second wellbore data under this normal gas environment.

[0070] Preferably, the inner measuring rod 200 can be equipped with a plurality of first jackets 211 , and the control component controls the expansion and contraction of the plurality of first jackets 211 respectively.

[0071] Furthermore, the measuring device includes a delivery rod positioned longitudinally above the inner measuring rod 200. The delivery rod and inner measuring rod 200 are connected via a release mechanism. This release mechanism comprises a lure head mounted at the bottom of the delivery rod and a release mechanism mounted at the top of the inner measuring rod 200. One end of the cable and main fluid supply line respectively extend downward through the delivery rod and remain connected to the inner measuring rod 200. The other end of the cable and main fluid supply line extend upward to connect to the infusion device and control device, respectively.

[0072] In addition, the inner measuring rod 200 is equipped with a fixed jacket. This jacket is mounted above the first jacket 211 and is used to expand and stabilize the inner measuring rod 200 within the outer drill rod 100. The control assembly is configured to control the expansion or contraction of the fixed jacket. Preferably, the control assembly's control of the fixed jacket and its structural design can be similar to the control assembly's control of the first jacket 211 and its structural design. Therefore, the fixed jacket can be used to stabilize the inner measuring rod 200 within the outer drill rod 100 when the measuring chamber is lowered into the open hole section.

[0073] Optionally, the inner measuring rod 200 can be equipped with multiple retaining sleeves, depending on its length. These retaining sleeves can be spaced apart along the length of the inner measuring rod 200. These retaining sleeves can be used to create multiple positioning points for the inner measuring rod 200 in the outer drill pipe 100 when the measuring chamber is lowered into the open hole, further ensuring the stability of the inner measuring rod 200 as it is inserted into the open hole.

[0074] In addition, the measuring device of the present invention also includes an insert rod. The insert rod is installed in the outer drill rod 100 and, during the drilling process, drills synchronously with the drill tool assembly of the outer drill rod 100 and the drill bit. The insert rod can keep the axial through-hole of the drill bit closed during the drilling process. In addition, the measuring device of the present invention also includes a coring rod. The combination of the coring rod, the outer drill rod 100, and the drill bit can realize the function of a coring drill. During the drilling process, the coring rod is installed in the outer drill rod 100 and cooperates with the drill bit and its axial through-hole to complete the coring operation during the drilling process. It is worth mentioning that the insert rod, the coring inner rod, the outer drill rod 100, the drill bit and other components of the measuring device of the present invention and their installation relationship can directly use existing technology, such as the outer tube and inner tube assembly of the S75 rope coring drill tool. The dimensions of the existing components only need to ensure that the inner measuring rod 200 can pass through the interior of the outer drill rod and the axial through-hole of the drill bit without hindrance to enter the open hole drilling.

[0075] Furthermore, the present invention discloses a through-the-bit measurement while drilling (MWD) assembly 230. The MWD assembly 230 includes an inner measuring rod 200. The inner measuring rod 200 is equipped with a first jacket 211, a control assembly, a perfusion assembly 220, and a measurement assembly 230. The control assembly, perfusion assembly 220, and measurement assembly 230 are installed below the first jacket 211. The first jacket 211 is configured to expand outward or contract inward with the inner measuring rod 200 as the center. The control assembly is configured to control the expansion or contraction of the first jacket 211. The perfusion assembly 220 is configured to perfuse liquid below the expanded first jacket 211. The measurement assembly 230 measures at least first wellbore data below the expanded first jacket 211 after the first jacket 211 expands, and second wellbore data below the first jacket 211 after the first jacket 211 expands and the perfusion assembly 220 perfuses.

[0076] Based on this, the measuring component 230 of the present invention can be applied to different drilling equipment. For any drill pipe interior or open hole section, the measuring component 230 can be lowered to the target area via a cable or spliced rod, and the target area can be expanded, sealed, injected and pressurized to carry out measurements in the target area.

[0077] Furthermore, the present invention discloses a method for measuring while drilling a drill bit. The method employs a device for measuring while drilling a drill bit.

[0078] In this regard, Figure 2The method for measuring while drilling through a drill bit includes the following steps.

[0079] 10 First, the external drilling equipment drives the drill tool assembly of the outer drill rod 100 and the drill bit to drill into the target formation, and then the drill tool assembly is lifted up by the drilling equipment.

[0080] The top drive provides rotational torque for the drilling assembly. During drilling, a measurement-while-drilling (MWD) system monitors wellbore inclination and azimuth in real time. Seismic data is combined to construct a three-dimensional geosteering model. Downhole adjustable bend joints dynamically correct the trajectory to ensure drilling within the effective reservoir thickness and avoid deviation from the target area due to fault obstruction or sudden lithologic changes. The drill string assembly is equipped with non-magnetic drill collars and shock absorbers to eliminate geomagnetic interference and reduce lateral vibration. At this stage, the inner measuring rod has not yet entered the outer drill pipe 100. The inner cavity of the outer drill pipe 100 serves as the main channel for drilling fluid. Fluid is ejected from the drill bit's water hole, carrying cuttings back to the surface. After the drill tool assembly reaches the target formation, it is lowered to form an openhole section by lifting the drill tool assembly. The inner measuring rod 200 is specifically designed for real-time measurement operations in the openhole section. Furthermore, during drilling, the drill bit's axial through-hole can remain open or be sealed with an insert rod. When kept open, the external equipment continuously injects drilling fluid into the outer drill pipe, continuously flushing the soil and rock that enters the drill bit from the axial through hole to the outside of the drill bit, and then discharges it out of the well through the gap between the drill pipe and the well wall.

[0081] 20 The inner measuring rod 200 is lowered along the inner cavity of the outer drill rod 100.

[0082] The inner measuring rod 200 is lowered into the outer drill rod 100 through the cable, and the inner measuring rod 200 can be pumped downward by drilling fluid when necessary.

[0083] When it is determined that the inner measuring rod 200 has passed through the drill bit and reached the target formation area, the first jacket 211 is driven to expand by the control component. After the expansion, the first jacket 211 contacts and seals the inner wall of the well to obtain the first in-well data.

[0084] The distance that inner measuring rod 200 is lowered below outer drill rod 100 or the drill bit is measured based on the length of the deployed cable and / or the displacement sensor deployed in the measurement chamber. When a portion of inner measuring rod 200 reaches the target section below the drill bit, the control device uses the infusion device to inject liquid into first jacket 211 via a switching solenoid valve and a first infusion line. The liquid causes first jacket 211 to expand relative to the wellbore, forming a contact seal.

[0085] 40 injects liquid into the outside of the measuring rod 200 through the injection assembly 220 and forms a pressure difference.

[0086] The control device injects liquid into the bottom of the first jacket 211 through the infusion device via the switching solenoid valve and the second infusion pipeline, and the liquid forms a pressurized liquid environment in the well wall below the first jacket 211.

[0087] 50 controls the measurement component 230 to measure the wellbore data.

[0088] The pressure sensor measures the formation permeability in a pressurized liquid environment. The neutron source works in pulse mode, with each pulse emitting about 1×10 5 The neutron stream penetrates the formation, elastically scatters with hydrogen atoms in the rock, and slows down to thermal neutrons. The neutron detector uses a helium-3 counter tube, which is sensitive to thermal neutrons and records the number of thermal neutrons per second. The thermal neutron count rate is positively correlated with the formation porosity and is converted into neutron porosity φ through a calibration curve. N Neutron signal filter 8 removes non-thermal neutron signals with energies above 0.025 eV. Neutron signal amplifier 10 amplifies the counting pulse amplitude to a standard 5V level and stores it as parameter data. Of course, after the control assembly extracts the liquid from first jacket 211 to de-expand it and the priming assembly 220 extracts excess liquid, the sensors in the measurement chamber can still measure some wellbore data in a normal gas environment, such as measuring downhole temperature and capturing images of the wellbore wall.

[0089] Based on this, the through-bit measurement while drilling method of the present invention uses a through-bit measurement while drilling device to innovatively achieve dynamic sealing measurement of the open hole section behind the drill bit.

[0090] Furthermore, the present invention discloses a through-drill bit measurement while drilling device. Figure 3 The measuring device shown includes a drill bit, an outer drill rod 100, and an inner measuring rod 200. Unlike the former, the inner measuring rod 200 in the present invention is equipped with a first jacket 211, a second jacket 212, a control assembly, an injection assembly 220, and a measuring assembly 230. The control assembly, injection assembly 220, and measuring assembly 230 are installed between the first jacket 211 and the second jacket 212. The first jacket 211 and the second jacket 212 are respectively configured to expand outward or contract inward with the inner measuring rod 200 as the center. The control assembly is configured to control the expansion or contraction of the first jacket 211 and the second jacket 212. The injection assembly 220 is used to inject liquid into the exterior of the inner measuring rod 200. The measurement component 230 measures at least the first wellbore data below the first jacket 211 after the first jacket 211 expands, the second wellbore data below the first jacket 211 after the first jacket 211 expands and the perfusion component 220 is perfused, and the third wellbore data between the first jacket 211 and the second jacket 212 after the first jacket 211 and the second jacket 212 expand and the perfusion component 220 is perfused.

[0091] In the present invention, the expansion and contraction of the first and second jackets 211, 212 are controlled separately by a control assembly. After expansion, a separate, sealed space is formed between the first and second jackets 211, 212. After the injection assembly 220 injects liquid into the sealed space, a separate, dense liquid environment is created between the first and second jackets 211, 212. Therefore, the present invention enables measurement of target areas outside the wellbore bottom.

[0092] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

[0093] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A drilling measurement device. The measuring device includes a drill bit, an outer drill rod and an inner measuring rod; The outer drill rod is connected to the drill bit; The inner measuring rod is disposed inside the outer drill rod, and the inner measuring rod is configured to pass through the drill bit along the drilling direction; It is characterized by: The inner measuring rod is equipped with a first jacket, a control component, a perfusion component and a measuring component; The control assembly, the perfusion assembly, and the measurement assembly are installed below the first jacket; The first jacket is configured to expand outward or contract inward with the inner measuring rod as the center; The control assembly is configured to control the expansion or contraction of the first jacket; The perfusion assembly is used to perfuse liquid below the expanded first jacket; The measuring component at least measures: After the first jacket is expanded, first in-well data below the first jacket expansion is obtained. After the first jacket is expanded and the injection assembly is injected, the second wellbore data below the first jacket is obtained.

2. The drilling measurement while drilling device according to claim 1, characterized in that: The inner measuring rod is equipped with a fixed jacket; The fixing jacket is installed above the first jacket, and the fixing jacket is used to expand and stabilize the inner measuring rod in the outer drill rod; The control assembly is configured to control the expansion or contraction of the retaining jacket.

3. The measurement while drilling device according to claim 1, characterized in that: The first jacket is configured to cover a section of the inner measuring rod; The control assembly includes a first infusion hole and a first infusion pipeline configured on the inner measuring rod; The first infusion hole is configured in a section of the inner measuring rod covered by the first jacket; One end of the first infusion pipe is connected to the first infusion hole, and the other end passes through the inner measuring rod and is connected to an external infusion device.

4. The through-drilling measurement while drilling device according to claim 3, characterized in that: The perfusion assembly includes a second infusion hole and a second infusion pipeline configured on the inner measuring rod; The second infusion hole is configured below the section of the inner measuring rod covered by the first jacket; One end of the second infusion pipeline is connected to the second infusion hole, and the other end passes through the inner measuring rod and is connected to the infusion device.

5. The through-drilling measurement while drilling device according to claim 4, characterized in that: The inner measuring rod is equipped with a main liquid delivery pipeline and a multi-channel solenoid valve; The first infusion pipeline and the second infusion pipeline are respectively connected to the multi-channel solenoid valve; The multi-channel solenoid valve is connected to an external control device via a cable.

6. The through-drill measurement while drilling device according to claim 5, characterized in that: The measuring device includes a delivery rod disposed above the inner measuring rod along the length direction; The delivery rod and the inner measuring rod are connected via a release mechanism; The cable and the main infusion pipe pass through the delivery rod to connect the infusion device and the control device respectively.

7. The measurement while drilling device according to claim 5, characterized in that: The main infusion tube, the first infusion tube and the second infusion tube are configured as embedded flow channels in the inner measuring rod.

8. The measurement while drilling device according to claim 1, characterized in that: The measuring component at least includes a pressure sensor, a neutron source and a gamma detector.

9. A drilling measurement method, characterized in that: Using the drill bit measurement while drilling device as claimed in claim 1, The drilling while drilling measurement method comprises: Driving the drill string assembly comprising the outer drill rod and the drill bit to drill into the target formation through external drilling equipment; lifting the drill assembly via the drilling equipment; Lowering the inner measuring rod along the inner cavity of the outer drill rod; When it is determined that the inner measuring rod has passed through the drill bit and reached the target formation, the control component drives the first jacket to expand, and after the first jacket expands, it forms a contact seal with the inner wall of the well; perfusing liquid to the outside of the inner measuring rod through the perfusion assembly to form a pressure difference; The measuring component is controlled to measure first well data and second well data.

10. A drilling while drilling measurement assembly, characterized in that: The inner measuring rod is equipped with a first jacket, a control component, a perfusion component and a measuring component; The control assembly, the perfusion assembly, and the measurement assembly are installed below the first jacket; The first jacket is configured to expand outward or contract inward with the inner measuring rod as the center; The control assembly is configured to control the expansion or contraction of the first jacket; The perfusion assembly is used to perfuse liquid below the expanded first jacket; The measuring component at least measures: After the first jacket is expanded, first in-well data below the first jacket expansion is obtained. After the first jacket is expanded and the injection assembly is injected, the second wellbore data below the first jacket is obtained.

11. A drilling measurement device. The measuring device includes a drill bit, an outer drill rod and an inner measuring rod; The outer drill rod is connected to the drill bit; The inner measuring rod is disposed inside the outer drill rod, and the inner measuring rod is configured to pass through the drill bit along the drilling direction; It is characterized by: The inner measuring rod is equipped with a first jacket, a second jacket, a control component, a perfusion component and a measuring component; The control component, the perfusion component, and the measurement component are installed between the first jacket and the second jacket; The first jacket and the second jacket are respectively configured to expand outward or contract inward with the inner measuring rod as the center; The control assembly is configured to control the expansion or contraction of the first jacket and the second jacket; The perfusion assembly is used to perfuse liquid onto the exterior of the inner measuring rod; The measuring component at least measures: After the first jacket is expanded, first in-well data below the first jacket expansion is obtained. data in a second well below the first jacket after the first jacket is expanded and the injection assembly is injected; The third in-well data between the first jacket and the second jacket after the first jacket and the second jacket are expanded and the injection assembly is injected.

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