Screw core drill

Abstract

The present application relates to a kind of screw core drilling tools, including outer tube assembly and inner tube assembly, outer tube assembly is formed in the accommodation cavity, inner tube assembly is located in the accommodation cavity, and can be extracted from the accommodation cavity;Inner tube assembly includes detection device, pulse section, driving section and core piece connected axially in sequence;Pulse section includes first liquid inlet, pulse generator and first liquid outlet connected in sequence, medium liquid can enter pulse generator from first liquid inlet and output from first liquid outlet;Wherein, pulse generator can regulate the input resistance of medium liquid according to the drilling parameter, to realize the coding of medium liquid and then realize the transmission of drilling parameter by medium liquid, the drilling information detected by detection device is given in flushing fluid in the present application, the drilling information detected by detection device can be obtained by decoding the change of pressure value, the transmission of data is not limited by drilling depth, and wireless transmission of drilling information is realized.

Description

Technical Field

[0001] This invention relates to the technical field of geological exploration, and in particular to a screw core drilling tool. Background Technology

[0002] Currently, when conventional coring drills are used, the drilling pressure and torque are transmitted to the drill rod and then to the drill bit through the drilling rig. As the drilling distance increases, the torque transmitted to the drill bit decreases continuously, resulting in reduced drilling efficiency. Furthermore, conventional coring drills do not have a measurement-while-drilling function. When it is necessary to measure the borehole trajectory, the entire drill is usually lifted first, and then a slant gauge is lowered into the hole for measurement. The whole process is time-consuming, and it is difficult to adjust the trajectory when it is found that the borehole trajectory deviates from the expected trajectory. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a screw core drilling tool, which solves the technical problems of the prior art that the core drilling tool does not have a drilling measurement function, and when it is necessary to measure the drilling trajectory, the entire drill is usually lifted first, and then a slant measuring tool is lowered into the hole for measurement. The whole process is time-consuming, and it is difficult to adjust the trajectory when it is found that the drilling trajectory deviates from the expected trajectory.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the main technical solution adopted by the present invention includes a screw core drill, comprising an outer tube assembly and an inner tube assembly. The outer tube assembly forms a receiving cavity, and the inner tube assembly is disposed within the receiving cavity and can be extracted from the cavity. The outer tube assembly includes a drill rod, a connecting assembly, and a drill bit connected axially in sequence. The connecting assembly can bear and transmit the torque output from the inner tube assembly to the drill bit, and cause the drill bit to perform a rotational action relative to the drill rod. The inner tube assembly includes a detection device, a pulse section, a drive section, and a core extractor connected axially in sequence. The detection device is used to detect drilling parameters. The pulse section includes a first inlet section, a pulse generator, and a first outlet section connected in sequence. The medium liquid can enter the pulse generator from the first inlet section and then exit from the first outlet section. The pulse generator can adjust the input resistance of the medium liquid according to the drilling parameters to achieve encoding of the medium liquid and thus transmit the drilling parameters through the medium liquid.

[0007] In this technical solution, the drill bit is located at one end of the drill pipe and is used to perform a rotational action under the drive of the flushing fluid. The drill bit can rotate relative to the drill pipe to achieve drilling. The detection device is used to detect drilling information, such as azimuth angle, inclination angle, and tool face angle. The inner tube assembly can convert the kinetic energy of the flushing fluid into torque to drive the drill bit to rotate. It can also impart the drilling information detected by the detection device into the flushing fluid and transmit it to the well surface, thereby realizing long-distance wireless data transmission.

[0008] The inner tube assembly includes a pulse section, which includes a first liquid inlet, a pulse generator, and a first liquid outlet connected in sequence. The medium liquid can enter the pulse generator from the first liquid inlet and then be output from the first liquid outlet. The pulse generator can encode the flushing liquid according to the perforation information detected by the detection device. For example, the pulse generator can perform the adjustment action of the input resistance of the medium liquid according to the detection information of the detection device to realize the encoding of the medium liquid.

[0009] Both the first liquid inlet and the first liquid outlet contain water channels, which are connected by a pulse generator.

[0010] Specifically, during the entire encoding process, the pulse generator can adjust the flow resistance of the flushing fluid as it flows through the pulse generator based on the information detected by the detection device. For example, the flow resistance can be set to two modes: high flow resistance or low flow resistance. Based on the detection information from the detection device, the pulse generator can change the magnitude of the flow resistance in a specific order, so that the input end of the medium liquid, i.e., the flushing fluid, can obtain a larger input resistance or a smaller flow resistance. This input resistance will be reflected in the change of the flushing fluid input pressure value. By decoding the change of the pressure value, the perforation information detected by the detection device can be obtained.

[0011] More specifically, the medium flowing in the drill pipe cavity is a flushing fluid, the detection device is an integrated module that can be set in the cavity, and it detects information such as azimuth angle, well inclination angle and tool face angle. A second thrust bearing is also set between the core sampler and the drive section, and the core sampler can be set as a core sampler cylinder.

[0012] Compared with the prior art, the present invention imparts the perforation information detected by the detection device to the rinsing fluid. By decoding the changes in pressure value, the perforation information detected by the detection device can be obtained. Since the perforation information is imparted to the rinsing fluid, the data transmission is not limited by the perforation depth, thus realizing the wireless transmission of perforation information.

[0013] When performing drilling parameter testing, the machine needs to be stopped. After the testing is completed, the pump is turned on to transmit drilling data. When the drilling parameters are found to meet the predetermined standards, drilling pressure is then applied to the drill rod.

[0014] Because the drilling information is encoded into the change in the input pressure of the flushing fluid, the detection and transmission of drilling information can be achieved without lifting the drill, thus reducing the overall time of the drilling operation and ensuring that the drilling work can be carried out efficiently.

[0015] In one technical solution of the present invention, the drive section includes a second liquid inlet, a drive member, and a second liquid outlet connected in sequence. The medium liquid output from the first liquid outlet can enter the drive member from the second liquid inlet and then be output from the second liquid outlet, thereby converting the kinetic energy of the medium liquid into the torque of the drive member; the pulse section and the drive section can be connected by a detection device.

[0016] In one technical solution of the present invention, the inner tube assembly further includes two sets of sealing elements, which are respectively disposed in the pulse section and the drive section. The two sets of sealing elements divide the receiving cavity into a first chamber, a second chamber and a third chamber that are independent and mutually sealed. The first chamber and the second chamber are connected through the pulse section, and the second chamber and the third chamber are connected through the drive section.

[0017] In one technical solution of the present invention, the inner tube assembly further includes a spring clip and a retrieval spearhead, both of which are located in the first liquid inlet section; wherein, the spring clip abuts against the inner wall of the first chamber, thereby achieving axial positioning of the inner tube assembly, and the retrieval spearhead is used to pull the first liquid inlet section, thereby achieving traction of the inner tube assembly.

[0018] In one technical solution of the present invention, the pulse generator includes a body, a valve core, and a flow regulating component. The body has a first valve cavity, a first channel, a second channel, a third channel, and a second valve cavity, which are arranged radially along the body. The valve core is slidably mounted in the first valve cavity. The first channel and the second channel are both connected to a first liquid inlet, and the third channel is connected to a first liquid outlet. The flow regulating component is disposed in the second valve cavity. The flow regulating component can be controlled by the valve core to open or close the communication between the second channel and the third channel, as well as between the first channel and the third channel. The flow resistance of the medium liquid flowing from the second channel to the third channel is greater than the flow resistance of the medium liquid flowing from the first channel to the third channel.

[0019] In one technical solution of the present invention, the pulse generator further includes an adjustment device, which can be disposed on the main body. The adjustment device is used to apply a force to the valve core according to the detection information of the detection device, thereby realizing the control of the valve core position.

[0020] In one technical solution of the present invention, the flow regulating component includes a sealing ball and a spring. The sealing ball is located between the valve core and the spring and can bear the force from the spring and the valve core. The sealing ball can change its engagement state with the body to keep the first valve chamber and the second valve chamber connected or closed, thereby realizing the opening or closing of the connection between the first channel and the third channel.

[0021] The engagement state includes a contact state and a disengagement state. The contact state corresponds to the state in which the first valve chamber and the second valve chamber are kept closed. The contact state also corresponds to the state in which the valve core opens the connection between the first channel and the third channel.

[0022] The disengaged state corresponds to the state in which the first valve chamber and the second valve chamber remain connected, and the disengaged state also corresponds to the state in which the valve core closes the connection between the first channel and the third channel.

[0023] In one technical solution of the present invention, the connecting assembly includes a bent joint and a long joint, with the two ends of the bent joint being threadedly connected to the drill pipe and the long joint, respectively.

[0024] The connecting assembly also includes a first thrust bearing, a torsion transmission short joint, a coupling, a radial bearing, an elastic element, and a reamer;

[0025] The first thrust bearing, the torsion transmission short joint, the coupling, the radial bearing, and the elastic element are all located inside the long joint. The first thrust bearing is located between the bent joint and the torsion transmission short joint and is used to bear the pressure applied by the bent joint to the torsion transmission short joint.

[0026] The torque transmission short section is equipped with a long key, which is connected to the drive section for transmission, and the relative circumferential position of the torque transmission short section and the drive section can be kept consistent.

[0027] One end of the coupling is threaded to a torque transmission short joint, and the other end of the coupling is threaded to a reamer. The reamer is threaded to a drill bit. The outer surface of the reamer is provided with a first cylindrical surface, a first stepped surface, and a second cylindrical surface that are axially connected in sequence. The diameter of the first cylindrical surface is larger than the diameter of the second cylindrical surface. A radial bearing and an elastic element are provided on the second cylindrical surface.

[0028] In one technical solution of the present invention, the connecting assembly further includes a stabilizing ring. The inner surface of the expander has a third cylindrical surface, a second stepped surface and a fourth cylindrical surface, wherein the diameter of the third cylindrical surface is smaller than the diameter of the fourth cylindrical surface. The stabilizing ring is disposed in the space enclosed by the fourth cylindrical surface, and the third cylindrical surface is clearance-fitted with the core extractor.

[0029] (III) Beneficial Effects

[0030] The beneficial effects of the present invention are as follows: The screw core drill of the present invention includes a pulse section in the inner tube assembly, which includes a first liquid inlet, a pulse generator, and a first liquid outlet connected in sequence. The medium liquid can enter the pulse generator from the first liquid inlet and then be output from the first liquid outlet. The pulse generator can encode the flushing fluid according to the drilling information detected by the detection device. For example, the pulse generator performs the adjustment action of the input resistance of the medium liquid according to the detection information of the detection device to realize the encoding of the medium liquid.

[0031] Throughout the encoding process, the pulse generator can adjust the flow resistance of the flushing fluid by using information detected by the detection device. For example, the flow resistance can be set to two modes: high flow resistance or low flow resistance. Based on the detection information from the detection device, the pulse generator can change the magnitude of the flow resistance in a specific order, thereby enabling the input end of the medium fluid, i.e., the flushing fluid, to obtain a larger or smaller input resistance. This input resistance will be reflected in the change of the flushing fluid input pressure value. By decoding the change in pressure value, the perforation information detected by the detection device can be obtained.

[0032] Compared with the prior art, the present invention imparts the perforation information detected by the detection device to the rinsing fluid. By decoding the changes in pressure value, the perforation information detected by the detection device can be obtained. Since the perforation information is imparted to the rinsing fluid, the data transmission is not limited by the perforation depth, thus realizing the wireless transmission of perforation information.

[0033] When performing drilling parameter testing, the machine needs to be stopped. After the testing is completed, the pump is turned on to transmit drilling data. When the drilling parameters are found to meet the predetermined standards, drilling pressure is then applied to the drill rod.

[0034] Because the drilling information is encoded into the change in the input pressure of the flushing fluid, the detection and transmission of drilling information can be achieved without lifting the drill, thus reducing the overall time of the drilling operation and ensuring that the drilling work can be carried out efficiently. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the screw core drilling tool of the present invention;

[0036] Figure 2 This is a schematic diagram of the pulse segment structure of the present invention.

[0037] [Explanation of Labels in the Attached Image]

[0038] 1: Drill pipe;

[0039] A: Receiving cavity;

[0040] A1: First chamber;

[0041] A2: Second chamber;

[0042] A3: Third chamber;

[0043] 2: Drill bit;

[0044] 3: Connecting components;

[0045] 221: Long connector;

[0046] 222: First thrust bearing;

[0047] 223: Transmit a short twist;

[0048] 224: Coupling;

[0049] 225: Radial bearing;

[0050] 226: Elastic element;

[0051] 227: Reamer;

[0052] 228: Stabilizing loop;

[0053] 229: Elbow joint;

[0054] 4: Pulse segment;

[0055] 41: First liquid inlet section;

[0056] 42: Pulse generator;

[0057] 421: Ontology;

[0058] B: First valve chamber;

[0059] C: First channel;

[0060] D: Second channel;

[0061] E: Third channel;

[0062] F: Second valve chamber;

[0063] 422: Valve core;

[0064] 423: Flow regulating component;

[0065] 4231: Sealed ball;

[0066] 4232: Spring;

[0067] 424: Adjustment device;

[0068] 43: First liquid outlet section;

[0069] 5: Drive segment;

[0070] 51: Second liquid inlet section;

[0071] 52: Driving components;

[0072] 53: Second liquid outlet section;

[0073] 6: Detection device;

[0074] 7: Seals;

[0075] 8: Card ejection;

[0076] 9: Retrieve the spearhead;

[0077] 10: Core extraction component. Detailed Implementation

[0078] To better explain and facilitate understanding of this invention, the following description is provided in conjunction with the appendix. Figure 1-2 The present invention will be described in detail through specific embodiments. In this document, directional terms such as "upper," "lower," etc., are used interchangeably. Figure 1 The orientation is used as a reference.

[0079] Example 1:

[0080] Reference Figure 1 and Figure 2 This invention provides a screw core drilling tool, comprising an outer tube assembly and an inner tube assembly. The outer tube assembly forms a receiving cavity A, and the inner tube assembly is disposed in the receiving cavity A and can be extracted from the receiving cavity A. The outer tube assembly includes a drill rod 1, a connecting assembly 3, and a drill bit 2 connected axially in sequence. The connecting assembly 3 can bear and transmit the torque output from the inner tube assembly to the drill bit 2, and cause the drill bit 2 to perform an operating action relative to the drill rod 1. The inner tube assembly includes a detection device 6, a pulse segment 4, a drive segment 5, and a core extractor 10 connected axially in sequence. The pulse segment 4 includes a first liquid inlet 41, a pulse generator 42, and a first liquid outlet 43 connected in sequence. The medium liquid can enter the pulse generator 42 from the first liquid inlet 41 and then be output from the first liquid outlet 43. The pulse generator 42 can adjust the input resistance of the medium liquid according to the drilling parameters to realize the encoding of the medium liquid and thus realize the transmission of drilling parameters through the medium liquid.

[0081] The detection device 6 is used to detect drilling parameters, and the connecting component 3 can bear and transmit the torque output from the inner tube assembly to the drill bit 2, and make the drill bit 2 perform an operating action relative to the drill rod 1.

[0082] In this embodiment, the drill bit 2 is located at one end of the drill rod 1 and is used to perform a rotational action under the drive of the flushing fluid. The drill bit 2 can rotate relative to the drill rod 1 to achieve drilling. The detection device 6 is used to detect drilling information, such as azimuth angle, well inclination angle and tool face angle. The inner tube assembly can convert the kinetic energy of the flushing fluid into the torque that drives the drill bit 2 to rotate. It can also impart the drilling information detected by the detection device 6 into the flushing fluid and transmit it to the well surface, thereby realizing long-distance wireless data transmission.

[0083] The inner tube assembly includes a pulse segment 4, which includes a first liquid inlet 41, a pulse generator 42, and a first liquid outlet 43 connected in sequence. The medium liquid can enter the pulse generator 42 from the first liquid inlet 41 and then be output from the first liquid outlet 43. The pulse generator 42 can encode the rinsing liquid according to the perforation information detected by the detection device 6. For example, the pulse generator 42 can perform the adjustment action of the input resistance of the medium liquid according to the detection information of the detection device 6 to realize the encoding of the medium liquid.

[0084] Both the first liquid inlet section 41 and the first liquid outlet section 43 contain water channels, which are connected by a pulse generator 42.

[0085] Specifically, during the entire encoding process, the pulse generator 42 can adjust the flow resistance of the flushing fluid as it flows through the pulse generator 42 based on the information detected by the detection device 6. For example, the flow resistance can be set to two modes: large flow resistance or small flow resistance. Based on the detection information of the detection device 6, the pulse generator 42 can change the magnitude of the flow resistance in a specific order, so that the input end of the medium liquid, i.e., the flushing fluid, can obtain a larger input resistance or a smaller flow resistance. This input resistance will be reflected in the change of the flushing fluid input pressure value. By decoding the change of the pressure value, the drilling information detected by the detection device 6 can be obtained.

[0086] More specifically, the medium flowing in cavity A of drill pipe 1 is flushing fluid, the detection device 6 is an integrated module that can be set in cavity A and detect information such as azimuth angle, well inclination angle and tool face angle, and a second thrust bearing is also set between core sampler 10 and drive section 5. Core sampler 10 can be set as core sampler cylinder.

[0087] Compared with the prior art, the present invention imparts the perforation information detected by the detection device 6 into the rinsing fluid. By decoding the changes in pressure value, the perforation information detected by the detection device 6 can be obtained. Since the perforation information is imparted into the rinsing fluid, the data transmission is not limited by the perforation depth, thus realizing the wireless transmission of perforation information.

[0088] When performing drilling parameter testing, the machine needs to be stopped. After the testing is completed, the pump is turned on to transmit drilling data. When the drilling parameters are found to meet the predetermined standards, drilling pressure is then applied to drill rod 1.

[0089] Because the drilling information is encoded into the change in the input pressure of the flushing fluid, the detection and transmission of drilling information can be achieved without lifting the drill, thus reducing the overall time of the drilling operation and ensuring that the drilling work can be carried out efficiently.

[0090] Example 2:

[0091] Reference Figure 1 and Figure 2 In addition to possessing all the technical solutions of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0092] The drive section 5 includes a second liquid inlet 51, a drive member 52, and a second liquid outlet 53 connected in sequence. The medium liquid output from the first liquid outlet 43 can enter the drive member 52 from the second liquid inlet 51 and then be output from the second liquid outlet 53, thereby converting the kinetic energy of the medium liquid into the torque of the drive member 52. The pulse section 4 and the drive section 5 can be connected through the detection device 6.

[0093] Water passages also exist within the second liquid inlet section 51 and the second liquid outlet section 53, and these water passages are connected by the drive unit 52.

[0094] In this embodiment, the inner tube assembly also includes a drive section 5 connected to the pulse section 4. The drive section 5 is used to convert the kinetic energy of the medium liquid into the torque that drives the drill bit 2 to operate.

[0095] The drive section 5 includes a second liquid inlet 51, a drive component 52, and a second liquid outlet 53. The second liquid inlet 51 receives the flushing fluid output from the first liquid outlet 43. The drive component 52 can be configured as a screw motor, which drives the rotor to rotate by hydraulic power, thereby driving the drill bit 2 to rotate.

[0096] Specifically, the detection device 6 can be set between the drive segment 5 and the pulse segment 4. The detection device 6 needs to have its own power supply to connect the two and facilitate the transmission of detection information from the detection device 6 to the pulse segment 4.

[0097] Example 3:

[0098] Reference Figure 1 and Figure 2 In addition to possessing all the technical solutions of any of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0099] The inner tube assembly also includes two sets of seals 7, which can be configured as sealing pistons. The two sets of seals 7 are respectively located in the pulse section 4 and the drive section 5. The two sets of seals 7 divide the receiving cavity A into a first chamber A1, a second chamber A2 and a third chamber A3 that are independent and mutually sealed. The first chamber A1 and the second chamber A2 are connected through the pulse section 4, and the second chamber A2 and the third chamber A3 are connected through the drive section 5.

[0100] In this embodiment, the seal 7 divides the receiving cavity A into three continuous and independent chambers, so that the flushing fluid enters the pulse generator 42 through the first inlet 41, is output through the first outlet 43, and enters the drive unit 52 through the second inlet 51, ensuring that the pulse segment 4 and the drive segment 5 can stably and reliably execute the corresponding signal editing and drive the drill bit 2 to operate.

[0101] Example 4:

[0102] Reference Figure 1 and Figure 2 In addition to possessing all the technical solutions of any of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0103] The inner tube assembly also includes a spring clip 8 and a retrieval spearhead 9, both of which are located in the first liquid inlet 41. The spring clip 8 abuts against the inner wall of the first chamber A1 to achieve axial positioning of the inner tube assembly, and the retrieval spearhead 9 is used to pull the first liquid inlet 41 to achieve traction of the inner tube assembly.

[0104] In this embodiment, the inner tube assembly also includes a spring clip 8 and a retrieval spearhead 9. The spring clip 8 is disposed on the first liquid inlet 41 to realize the positioning of the inner tube assembly inside the drill rod 1, so that the inner tube assembly is always in a specific position after being installed in the drill rod 1. For example, a spring clip chamber is provided at the corresponding position on the inner wall of the drill rod 1 to ensure the reliability of the inner tube assembly.

[0105] The retrieval spearhead 9 serves as the traction end of the inner tube assembly. By traction of the retrieval spearhead 9, the inner tube assembly can be disengaged from the drill rod 1.

[0106] Example 5:

[0107] Reference Figure 1 and Figure 2 In addition to possessing all the technical solutions of any of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0108] The pulse generator 42 includes a body 421, a valve core 422, and a flow regulating element 423.

[0109] The body 421 has a first valve chamber B, a first channel C, a second channel D, a third channel E, and a second valve chamber F. The first valve chamber B and the second valve chamber F are arranged radially along the body 421.

[0110] The valve core 422 is slidably installed in the first valve chamber B. The first channel C and the second channel D are both connected to the first liquid inlet 41, and the third channel E is connected to the first liquid outlet 43.

[0111] Flow regulating element 423 is located in the second valve chamber F;

[0112] The flow regulating element 423 can be controlled by the valve core 422 to open or close the connection between the second channel D and the third channel E, as well as between the first channel C and the third channel E, and the flow resistance of the medium liquid flowing from the second channel D to the third channel E is greater than the flow resistance of the medium liquid flowing from the first channel C to the third channel E.

[0113] In this embodiment, the pulse generator 42 includes a body 421, a valve core 422, and a flow regulating component 423. The body 421 serves as the main component of the pulse generator 42, with its two ends connected to a first liquid inlet 41 and a first liquid outlet 43. The body 421 has a first valve chamber B, a first channel C, a second channel D, a third channel E, and a second valve chamber F. The first valve chamber B and the second valve chamber F can be arranged opposite each other, that is, both can be arranged along the radial direction of the body 421. The first valve chamber B and the second valve chamber F are used to correspondingly arrange the valve core 422 and the flow regulating component 423. The valve core 422 can interact with the flow regulating component 423, thereby enabling the flow regulating component 423 to change the connection relationship between the second channel D and the third channel E, and also change the connection relationship between the first channel C and the third channel E.

[0114] Since the flow regulating component 423 can change the connection between the second channel D and the third channel E, as well as the connection between the first channel C and the third channel E, there are two flow paths between the first channel C and the third channel E, namely the first channel C to the third channel E and the second channel D to the third channel E.

[0115] Furthermore, under the control of the flow regulator 423, only one of the two flow channels can be open. When only the first channel C to the third channel E is open, the flow resistance of the medium is relatively small. The flow resistance is fed back to the medium input end, which makes the medium input pressure at the medium input end also small. At this time, a kind of information can be obtained.

[0116] When only the second channel D and the third channel E are conducting, the flow resistance is greater than in the previous case. This flow resistance is fed back to the medium input end, resulting in a larger medium input pressure. In this case, another type of information can be obtained. By combining these two situations, a code can be obtained. The detection information of the detection device 6 is assigned to this code. Then, the code information is decoded at the medium input end to obtain the detection information of the detection device 6.

[0117] Specifically, binary information transmission can be used to realize the information transmission of the detection device 6.

[0118] Example 6:

[0119] Reference Figure 1 and Figure 2In addition to possessing all the technical solutions of any of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0120] The pulse generator 42 also includes an adjustment device 424, which can be located on the main body 421. The adjustment device 424 is used to apply a force to the valve core 422 according to the detection information of the detection device 6, thereby realizing the adjustment of the position of the valve core 422.

[0121] In this embodiment, the pulse generator 42 also includes an adjustment device 424, which is used to control the valve core 422, thereby enabling the valve core 422 to interact with the flow regulating element 423 to change the conduction relationship between the second water path and the third water path.

[0122] Specifically, the regulating device 424 may include a telescopic drive and a sleeve. The sleeve is fitted onto the outside of the body 421. One end of the sleeve is provided with a conical surface. When the conical surface interacts with the valve core 422, the valve core 422 can move downward, thereby changing the state of the flow regulating component 423. After the sleeve is reset, both the valve core 422 and the flow regulating component 423 are reset.

[0123] More specifically, the telescopic drive component must be completely enclosed within the housing to achieve a high level of sealing, in order to match harsh operating conditions.

[0124] At the same time, a power supply module, such as a battery, should be provided to supply power to the regulating device 424 and the detection device 6.

[0125] Example 7:

[0126] Reference Figure 1 and Figure 2 In addition to possessing all the technical solutions of any of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0127] The flow regulating component 423 includes a sealing ball 4231 and a spring 4232. The sealing ball 4231 is located between the valve core 422 and the spring 4232 and can bear the force from the spring 4232 and the valve core 422. The sealing ball 4231 can change its engagement state with the body 421 to keep the first valve chamber B and the second valve chamber F connected or closed, thereby opening or closing the connection between the first channel C and the third channel E.

[0128] The engagement state includes a contact state and a disengagement state. The contact state corresponds to the state in which the first valve chamber B and the second valve chamber F are kept closed. The contact state also corresponds to the state in which the valve core 422 opens the connection between the first channel C and the third channel E.

[0129] The disengaged state corresponds to the state in which the first valve chamber B and the second valve chamber F remain connected. The disengaged state also corresponds to the state in which the valve core 422 closes the connection between the first channel C and the third channel E.

[0130] In this embodiment, the flow regulating component 423 includes a sealing ball 4231 and a spring 4232. The sealing ball 4231 is located between the spring 4232 and the valve core 422. When the sealing ball 4231 is squeezed to the upper dead point position by the spring 4232, the connection between the second channel D and the third channel E is closed. That is to say, the flow regulating component 423 is a normally closed valve.

[0131] Example 8:

[0132] Reference Figure 1 and Figure 2 In addition to possessing all the technical solutions of any of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0133] The connecting assembly 3 includes a bent joint 229 and a long joint 221, with the two ends of the bent joint 229 threadedly connected to the drill pipe 1 and the long joint 221, respectively.

[0134] The connecting assembly also includes a first thrust bearing 222, a torque transmission short section 223, a coupling 224, a radial bearing 225, an elastic element 226, a reamer 227, and a stabilizing ring 228. The first thrust bearing 222, the torque transmission short section 223, the coupling 224, the radial bearing 225, and the elastic element 226 are all located inside the long joint 221. The first thrust bearing 222 is located between the bent joint 229 and the torque transmission short section 223 and is used to bear the pressure applied by the bent joint 229 to the torque transmission short section 223.

[0135] The torque transmission short section 223 is provided with a long key, which is connected to the drive section 5 for transmission, and the relative circumferential position of the torque transmission short section 223 and the drive section 5 can be kept consistent.

[0136] One end of the coupling 224 is threaded to the torque transmission short joint 223, and the other end of the coupling 224 is threaded to the reamer 227. The outer surface of the reamer 227 is provided with a first cylindrical surface, a first stepped surface and a second cylindrical surface connected axially in sequence. The diameter of the first cylindrical surface is larger than the diameter of the second cylindrical surface. A radial bearing 225 and an elastic element 226 are provided on the second cylindrical surface.

[0137] The reamer 227 is threadedly connected to the drill bit. The inner surface of the reamer 227 has a third cylindrical surface, a second stepped surface, and a fourth cylindrical surface, wherein the diameter of the third cylindrical surface is smaller than the diameter of the fourth cylindrical surface. The stabilizing ring 228 is disposed in the space enclosed by the fourth cylindrical surface. The third cylindrical surface is clearance-fitted with the core extractor.

[0138] There is a predetermined angle between the drill bit 2 and the drill rod 1. That is, there is an angle between the rotation axis of the drill bit 2 and the rotation axis of the drill rod 1. In this way, the drilling direction of the drill bit 2 can be controlled by rotating the drill rod 1. Specifically, the angle between the two can be set to no more than 2°.

[0139] When the machine stops, the detection device 6 measures the well inclination angle, azimuth angle, and tool face angle, and transmits the data to the pulse segment 4.

[0140] After the pump is started, data transmission begins. Pulse segment 4 encodes the data according to a certain pattern. The ground decodes and calculates the encoded information to obtain the actual drilling trajectory and tool face angle.

[0141] If the actual drilling trajectory deviates from the expected drilling trajectory, it can be adjusted by adjusting the tool face angle. That is, rotate the drill rod 1 of the drilling rig to change the orientation of the drill bit 2, then stop the machine, start the measurement sub to measure, transmit the data to the pulse segment 4, then start the pump to complete the data transmission, and confirm whether the tool face angle is adjusted in place. If it is not adjusted in place, repeat this step. If it is adjusted in place, adjust the flow rate, stop the data transmission, apply drilling pressure again, and start directional core drilling.

[0142] In this embodiment, the connecting assembly 22 includes a bent joint 229, a long joint 221, a first thrust bearing 222, a torque transmission short joint 223, a coupling 224, a radial bearing 225, an elastic element 226, a reamer 227, and a stabilizing ring 228. One end of the bent joint 23 is threaded to the drill rod 1, and the other end is threaded to the long joint 221.

[0143] The long connector 221 is equipped with a first thrust bearing 222, a torque transmission short joint 223, a coupling 224, a radial bearing 225, and a spring 4232. The long connector 221 is mainly used to provide axial positioning for its internal parts.

[0144] The first thrust bearing 222 is located between the end face of the elbow joint 23 and the end face of the torque transmission stub 223, and is used to reduce the frictional force when the two rotate relative to each other.

[0145] The torque transmission stub 223 has a long key inside for keyed connection with the drive section 5, ensuring that the relative circumferential position of the drive section 5 and the torque transmission stub 223 is consistent. During normal drilling, the torque transmission stub 223 and the long connector 221 will rotate relative to each other. Each time the machine stops, the torque transmission stub 223 will automatically rotate back to its initial position, so that the relative circumferential position of the torque transmission stub 223 and the long connector 221 is consistent with the initial position. Therefore, when the machine stops, the circumferential position of the drive section 5 is consistent with the circumferential position of the long connector 221, that is, consistent with the circumferential position of the elbow 23, which can be used to measure the orientation of the elbow 23, that is, the tool face angle.

[0146] One end of the coupling 224 is threaded to the torque transmission short joint 223, and the other end is threaded to the reamer 227. Its outer surface has a first cylindrical surface, a stepped surface, and a second cylindrical surface; wherein the diameter of the first cylindrical surface is larger than that of the second cylindrical surface; a radial bearing 225 and an elastic element 226 are mounted on the second cylindrical surface to reduce the frictional force when the two rotate relative to each other.

[0147] The stabilizing ring 228 serves to support the core extractor 10. The stabilizing ring 228 is interference-fitted with the hole expander 227 and rotates together. The material of the stabilizing ring 228 can be copper.

[0148] It can be understood that, except for conflicting parts, the above embodiments 1-10 can be freely combined to form other embodiments of the present invention.

[0149] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0150] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0151] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0152] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0153] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A screw-type coring tool, characterized in that: It includes an outer tube assembly and an inner tube assembly, wherein the outer tube assembly forms a receiving cavity (A), the inner tube assembly is disposed in the receiving cavity (A), and can be extracted from the receiving cavity (A); The inner tube assembly includes a detection device (6), a pulse segment (4), a drive segment (5), and a core extractor (10) connected axially in sequence. The detection device (6) is used to detect drilling parameters. The pulse segment (4) includes a first liquid inlet (41), a pulse generator (42) and a first liquid outlet (43) connected in sequence. The medium liquid can enter the pulse generator (42) from the first liquid inlet (41) and then be output from the first liquid outlet (43). The pulse generator (42) can adjust the input resistance of the medium liquid according to the drilling parameters to realize the encoding of the medium liquid and then realize the transmission of the drilling parameters through the medium liquid.

2. The screw core drilling tool as described in claim 1, characterized in that: The outer tube assembly includes a drill rod (1), a connecting assembly (3) and a drill bit (2) connected axially in sequence. The connecting assembly (3) can bear and transmit the torque output by the inner tube assembly to the drill bit (2), and cause the drill bit (2) to perform an operating action relative to the drill rod (1).

3. The screw core drilling tool as described in claim 2, characterized in that: The drive section (5) includes a second liquid inlet (51), a drive member (52), and a second liquid outlet (53) connected in sequence. The medium liquid output from the first liquid outlet (43) can enter the drive member (52) from the second liquid inlet (51) and then be output from the second liquid outlet (53), thereby converting the kinetic energy of the medium liquid into the torque of the drive member (52). The pulse segment (4) and the drive segment (5) can be connected through the detection device (6).

4. The screw core drilling tool as described in claim 3, characterized in that: The inner tube assembly also includes two sets of seals (7), which are respectively located in the pulse section (4) and the drive section (5). The two sets of seals (7) divide the receiving cavity (A) into a first chamber (A1), a second chamber (A2), and a third chamber (A3) that are independent and sealed to each other. The first chamber (A1) and the second chamber (A2) are connected by the pulse segment (4), and the second chamber (A2) and the third chamber (A3) are connected by the drive segment (5).

5. The screw core drilling tool as described in claim 4, characterized in that: The inner tube assembly also includes a spring clip (8) and a scooping spear (9), both of which are located in the first liquid inlet (41); The spring clip (8) abuts against the inner wall of the first chamber (A1) to achieve axial positioning of the inner tube assembly, and the retrieval spearhead (9) is used to pull the first liquid inlet (41) to achieve traction of the inner tube assembly.

6. The screw core drilling tool as described in claim 1, characterized in that: The pulse generator (42) includes: The body (421) has a first valve chamber (B), a first channel (C), a second channel (D), a third channel (E) and a second valve chamber (F) inside the body (421), the first valve chamber (B) and the second valve chamber (F) being arranged radially along the body (421); The valve core (422) is slidably installed in the first valve chamber (B), the first channel (C) and the second channel (D) are both connected to the first liquid inlet (41), and the third channel (E) is connected to the first liquid outlet (43); A flow regulating element (423) is disposed in the second valve chamber (F); The flow regulating element (423) can be controlled by the valve core (422) to open or close the communication between the second channel (D) and the third channel (E), and between the first channel (C) and the third channel (E), and the flow resistance of the medium liquid flowing from the second channel (D) to the third channel (E) is greater than the flow resistance of the medium liquid flowing from the first channel (C) to the third channel (E).

7. The screw core drilling tool as described in claim 6, characterized in that: The pulse generator (42) further includes an adjustment device (424), which is located on the body (421). The adjustment device (424) is used to apply a force to the valve core (422) according to the detection information of the detection device (6), thereby realizing the adjustment of the position of the valve core (422).

8. The screw core drilling tool as described in claim 7, characterized in that: The flow regulating component (423) includes a sealing ball (4231) and a spring (4232). The sealing ball (4231) is located between the valve core (422) and the spring (4232) and can bear the force from the spring (4232) and the valve core (422). The sealing ball (4231) can change its engagement state with the body (421) to keep the first valve chamber (B) and the second valve chamber (F) connected or closed, thereby opening or closing the connection between the first channel (C) and the third channel (E). The engagement state includes a contact state and a disengagement state. The contact state corresponds to the state in which the first valve chamber (B) and the second valve chamber (F) remain closed. The contact state also corresponds to the state in which the valve core (422) opens the communication relationship between the first channel (C) and the third channel (E). The disengagement state corresponds to the state in which the first valve chamber (B) and the second valve chamber (F) remain connected. The disengagement state also corresponds to the state in which the valve core (422) closes the connection between the first channel (C) and the third channel (E).

9. The screw core drilling tool as described in claim 2, characterized in that: The connecting assembly (3) includes a bent joint (229) and a long joint (221), with both ends of the bent joint (229) threadedly connected to the drill rod (1) and the long joint (221), respectively. The connecting assembly also includes a first thrust bearing (222), a torsion transmission short joint (223), a coupling (224), a radial bearing (225), an elastic element (226), and a reamer (227); The first thrust bearing (222), the torque transmission short joint (223), the coupling (224), the radial bearing (225), and the elastic element (226) are all located inside the long joint (221). The first thrust bearing (222) is located between the bent joint (229) and the torque transmission short joint (223) to bear the pressure applied by the bent joint (229) to the torque transmission short joint (223). The torque transmission short section (223) is provided with a long key, which is connected to the drive section (5) for transmission, and the relative circumferential position of the torque transmission short section (223) and the drive section (5) can be kept consistent. One end of the coupling (224) is threadedly connected to the torque transmission short joint (223), and the other end of the coupling (224) is threadedly connected to the reamer (227). The reamer (227) is threadedly connected to the drill bit. The outer surface of the reamer (227) is provided with a first cylindrical surface, a first stepped surface and a second cylindrical surface connected axially in sequence. The diameter of the first cylindrical surface is larger than the diameter of the second cylindrical surface. The radial bearing (225) and the elastic element (226) are provided on the second cylindrical surface.

10. The screw core drilling tool as described in claim 9, characterized in that: The connecting assembly further includes a stabilizing ring (228). The inner surface of the expander (227) has a third cylindrical surface, a second stepped surface, and a fourth cylindrical surface, wherein the diameter of the third cylindrical surface is smaller than the diameter of the fourth cylindrical surface. The stabilizing ring (228) is disposed in the space enclosed by the fourth cylindrical surface, and the third cylindrical surface is in clearance fit with the core extractor.

Images