A rotary drilling rig

Abstract

The present invention provides a rotary drilling rig, which comprises a main body, a drill pipe or a drill pipe assembly, and a hole enlarging bit; the hole enlarging bit is detachably arranged at the lower end of the drill pipe or the drill pipe assembly. When it is found that the drilling center is inclined, the ordinary drill bit can be replaced with the hole enlarging bit. The hole enlarging bit is fixed below the drill pipe or the drill pipe assembly. The drill pipe or the drill pipe assembly drives the hole enlarging bit to move to the bottom of the drill hole. The chassis abuts against the bottom of the drill hole. The drill pipe or the drill pipe assembly continues to move downward, the main body and the chassis approach relatively, the connecting part of the first connecting rod and the second connecting rod arches, the rotation drives the hole enlarging bit to rotate through the drill pipe or the drill pipe assembly at the same time, and the middle connecting part of the first connecting rod and the second connecting rod gradually enlarges the bottom of the drill hole, so as to achieve the effect of correcting the inclination.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering construction, and in particular, to a rotary drilling rig. Background Art

[0002] At present, rotary drilling rigs are widely used in the field of construction engineering. Their technical characteristics are the function of drilling and excavating large-diameter long pile holes by using multiple short penetrations, and they can serve foundation treatment, cut-off curtain, and foundation pit support projects. High-verticality pile bodies are the premise to ensure construction quality. Drilling and pile foundation projects with poor verticality will cause serious economic losses and even threaten project safety. At the same time, due to the development of urban buildings towards deep underground, the requirements for pile-forming depth and pile-forming verticality are getting higher and higher.

[0003] At the present stage, a large number of rotary drilling rigs are not equipped with corresponding devices for controlling the verticality of drilling. Some equipment uses devices or methods such as plumb lines, visual inspection, theodolites, and laser rangefinders to monitor the verticality of drilling. The above control methods all have many disadvantages. For example, the plumb line method and the visual inspection method have low accuracy, poor effect, and high subjectivity of operators. Although equipment such as theodolites and laser rangefinders improves the accuracy, their detection principles are all to infer the verticality of the drill pipe below the ground by observing the verticality of the mast or drill pipe above the ground. This method is an indirect measurement and has low accuracy.

[0004] Directly measuring the verticality of the drill hole below the ground along with the excavation penetration is an ideal method to ensure the verticality of the pile hole. However, so far, the industry still cannot achieve in-situ inclination measurement of rotary drilling rigs. This is mainly because the existing in-situ inclination measurement technology is mainly based on acceleration sensors. When measuring with this acceleration sensor, it is required that the measured object does not undergo variable-speed motion (such as rotation). Therefore, it is necessary to stop drilling for measurement. Moreover, the measured inclination value can only represent the inclination value at the depth where the inclination sensor is located. The overall hole inclination needs to be obtained by integrating the inclination values at each depth, and the integration operation will cause the calculation result to drift. Summary of the Invention

[0005] The purpose of the present invention is to provide a rotary drilling rig to solve at least one of the above technical problems existing in the prior art. This case is a divisional application of the patent document with the application date of March 31, 2022, the application number of 2022103290778, and the title of an in-situ inclination measurement device applicable to a rotary drilling rig.

[0006] To solve the above technical problems, an in-situ inclination measurement device applicable to a rotary drilling rig provided by the present invention includes: a main body, a drill pipe assembly, a swivel, a hoisting rope, and a first sensor;

[0007] The drill pipe assembly is erected on the main body; a drill bit is provided at the bottom of the drill pipe assembly;

[0008] The lower end of the swivel is hinged to the drill pipe assembly so as to be freely swingable back and forth and left and right. The upper end of the swivel is connected to one end of a lifting rope, and the lifting rope is used to lift the drill pipe assembly.

[0009] The first sensor is arranged inside the swivel and is used to detect the inclination of the borehole.

[0010] The body is the body or vehicle body of a rotary drilling rig.

[0011] Further, when the drill bit is filled with muck, during the process of pulling up the drill pipe assembly by the lifting rope and the swivel (or pulling up a set distance), when the lifting rope and the swivel are in a tensioned and taut state, the first sensor is used to detect the inclination of the borehole.

[0012] Further, the hinge point between the swivel and the drill pipe assembly is arranged on the central axis of the drill pipe assembly.

[0013] Further, the swivel is connected to the drill pipe assembly through a cross connector.

[0014] Wherein, the cross connector includes two pivot shafts vertically arranged in the horizontal projection plane. The two pivot shafts can be swingably connected back and forth and left and right.

[0015] Further, the drill pipe assembly includes a plurality of nested pipes sleeved in sequence. The pipes can move relative to each other axially and are relatively fixed circumferentially.

[0016] Among the pipes, there is a bottom pipe that is always at the bottom during the drilling process (i.e., it is arranged at the lowest position after the drill pipe assembly is fully extended).

[0017] The lower end of the bottom pipe is connected with a drill bit.

[0018] The lower end of the swivel is hinged to the top of the bottom pipe so as to be freely swingable back and forth and left and right.

[0019] During the drilling process, the bottom pipe is always at the bottom of the borehole. The first sensor module is arranged on the bottom pipe and continuously follows as the bottom pipe drills, so that the verticality of the borehole can be monitored at all times.

[0020] A locking mechanism is arranged between two adjacent pipes. For example, a locking pin is inserted into the pin holes on the two pipes to lock the two pipes.

[0021] Preferably, the bottom pipe is the innermost pipe in the radial direction.

[0022] Preferably, the bottom pipe is the innermost pipe. A water flow plate is arranged at the bottom of the bottom pipe, and the diameter of the water flow plate is larger than the aperture of the outermost pipe.

[0023] Further, it further includes a power device for driving the drill pipe assembly to rotate and move downward (downward spiral propulsion) during drilling.

[0024] Further, a column is provided on the body, and the drill pipe assembly and the power device are slidably arranged on the column up and down.

[0025] Further, a lifting mechanism is provided on the body, and the lifting mechanism includes a motor and a drum; the other end of the lifting rope is wound around the drum.

[0026] The lifting mechanism can quickly lift or lower the drill pipe assembly and the drill bit by using the lifting rope;

[0027] Among them, the power device and the lifting mechanism can adopt the prior art. For example, the power device includes a driving motor, a gear transmission mechanism, etc. Tooth teeth or gear structures cooperating with the gear transmission mechanism are provided on the outer circle of the outermost sleeve rod at the upper part of the drill pipe assembly.

[0028] Further, the first sensor includes an inclination measurement sensor and an azimuth measurement sensor; the azimuth measurement sensor is used for measuring the angle value of the rotation of the drill pipe assembly around its gravity axis; the inclination measurement sensor is used for measuring the included angle values between two orthogonal radial axes of the drill pipe assembly and the horizontal plane. Among them, the radial axes are the X and Y coordinate axes on the cross-section perpendicular to the axial direction of the drill pipe assembly. The inclination measurement sensor can respectively measure the included angle α between the X axis and the horizontal plane and the included angle β between the Y axis and the horizontal plane.

[0029] The prior art inclinometry technology cannot accurately measure the inclination value when the inclination measurement sensor is continuously rotating. This application overcomes the influence of the rotation of the drill pipe on the measurement and can measure the inclination degree of the drill pipe in the three-dimensional space in real time.

[0030] Further, the inclination angle of the column is adjustably arranged on the body. For example, the bottom of the column is pivotally connected to the body, and both ends of a telescopic structure such as a hydraulic cylinder or an air cylinder are pivotally connected to the middle upper part of the column and the body respectively. The telescopic mechanism extends or retracts to adjust the inclination angle of the column.

[0031] Preferably, the body is a traveling mechanism, such as a towing vehicle, etc.

[0032] Further, two adjacent sleeve rods include an inner sleeve rod and an outer sleeve rod. Guide grooves are axially arranged on the inner wall of the outer sleeve rod, and limit blocks or limit protrusions cooperating with the guide grooves for limit guiding are arranged on the outer circle of the inner sleeve rod.

[0033] Further, the hoisting device includes an upper hoisting part and a lower hoisting part that are relatively rotatably arranged around the hoisting direction; the upper end of the upper hoisting part is connected to the hoisting rope; the bottom of the lower hoisting part is connected to the drill pipe assembly; the first sensor is arranged on the lower hoisting part.

[0034] Further, the lower hoisting part is rotatably connected to the upper hoisting part through a connecting pin shaft, and the axial direction of the connecting pin shaft is the same as the hoisting direction of the hoisting device.

[0035] Preferably, a bearing is arranged between the connecting pin shaft and the shaft hole on the upper hoisting part or the lower hoisting part. Preferably, the bearing is a roller or a ball bearing.

[0036] Further, an installation chamber for accommodating and installing the first sensor is arranged inside the lower hoisting part; a power module and a communication module are also arranged in the installation chamber.

[0037] Further, a second sensor is also arranged on the bottom sleeve rod (preferably the upper part or the middle part) for detecting the inclination angle and azimuth angle of the bottom sleeve rod.

[0038] The second sensor can measure the inclination angle and azimuth angle from its own depth to the bottom section of the drill hole. The detection values of the two sensors for the hole inclination angle up and down are obtained by the differential method. For example, in the X-axis direction of the horizontal plane, the measured value of the first sensor is A, and the measured value of the second sensor is B. The inclination value of the whole hole in the X-axis direction is "[A×(drill hole depth - distance from the second sensor to the hole bottom) + B×distance from the second sensor to the hole bottom] / drill hole depth)".

[0039] Preferably, a second power module and a second communication module connected to the second sensor are also arranged on the middle part or the bottom of the bottom sleeve rod.

[0040] And, it further includes a reading instrument, which is connected to the first sensor and / or the second sensor through the communication module for receiving and reading the detection information of the first sensor and / or the second sensor.

[0041] Further, it further includes a hole enlarging bit for correcting the deviation of the drill hole; the hole enlarging bit includes a main body, a chassis, a connecting shaft, a first connecting rod and a second connecting rod;

[0042] A central hole is arranged on the main body;

[0043] The upper end of the connecting shaft is slidably inserted into the central hole up and down;

[0044] The chassis is arranged at the bottom end of the connecting shaft;

[0045] The upper end of the first connecting rod is hinged to the main body; the lower end of the first connecting rod is rotatably connected to the upper end of the second connecting rod;

[0046] The lower end of the second connecting rod is hinged to the chassis.

[0047] When the inclination is found at the drilling center, the ordinary drill bit can be replaced with a reaming bit. The reaming bit is fixed below the drill pipe or the drill pipe assembly. The drill pipe or the drill pipe assembly drives the reaming bit to move to the bottom of the drill hole. The chassis abuts against the bottom of the drill hole. The drill pipe or the drill pipe assembly continues to move downward. The main body and the chassis approach relatively. The connecting part of the first connecting rod and the second connecting rod arches. The rotation drives the reaming bit to rotate simultaneously through the drill pipe or the drill pipe assembly. The middle connecting part of the first connecting rod and the second connecting rod gradually reams the bottom of the drill hole, so as to achieve the effect of correcting the inclination.

[0048] Wherein, the lower end of the second connecting rod can be directly hinged to the chassis, or can be indirectly hinged, for example, the lower end of the second connecting rod is pivotally connected or hinged to the lower end of the connecting shaft.

[0049] Furthermore, it includes multiple groups of the first connecting rods and the second connecting rods which are evenly arranged at intervals in the circumferential direction.

[0050] Furthermore, it also includes a mounting seat and a tool. The lower end of the first connecting rod is hinged to the upper end of the mounting seat. The upper end of the second connecting rod is hingedly connected to the lower end of the mounting seat;

[0051] The tool is detachably arranged on the mounting seat, and the cutting edge of the tool faces outward.

[0052] Due to easy wear during use, by detaching and replacing with a new tool, the reaming bit can be quickly repaired.

[0053] Furthermore, it also includes a return spring. The two ends of the return spring are respectively connected to the mounting seat and the connecting shaft. After being stretched, the return spring tends to force the mounting seat to approach the connecting shaft, retract the tool, and further facilitate the extraction of the reaming bit from the drill hole and recovery.

[0054] Furthermore, it also includes a shovel and a third connecting rod. The shovel is slidably arranged up and down on the middle and lower part of the connecting shaft through a slider; One end of the third connecting rod is hingedly connected to the shovel, and the other end of the third connecting rod is hingedly connected to the middle and lower part of the second connecting rod; During the swinging process of the second connecting rod, the shovel is driven to move up and down through the third connecting rod, which is used to loosen and remove the soil near the connecting shaft, so as to ensure the smooth retraction of the first connecting rod, the second connecting rod and the tool. Avoid soil and stones being clamped between the connecting shaft and the tool and the connecting seat during reaming, preventing the tool from retracting, and thus unable to smoothly extract the reaming bit from the drill hole.

[0055] Furthermore, the shovel is trapezoidal; Shovel edges are arranged on both the upper and lower sides.

[0056] Further, the scraper blades and the second connecting rods are arranged in one-to-one correspondence.

[0057] In addition, the present application also discloses a rotary drilling rig, which includes: a main body, a drill pipe or a drill pipe assembly, and the reaming bit;

[0058] The reaming bit is detachably arranged at the lower end of the drill pipe or the drill pipe assembly.

[0059] Adopting the above technical solutions, the present invention has the following beneficial effects:

[0060] The in-the-hole inclinometer device applicable to a rotary drilling rig provided by the present invention solves the problem that the rotary drilling rig in the prior art fails to solve the problem of in-the-hole inclinometry, can detect the verticality of the drill pipe in real time during drilling, and has good measurement accuracy of the pile-forming verticality, thereby ensuring the pile-forming verticality and the quality of engineering construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0062] Figure 1 It is a schematic structural diagram of the in-the-hole inclinometer device applicable to a rotary drilling rig provided in Embodiment 1 of the present invention;

[0063] Figure 2 It is a schematic structural diagram of the swivel in Embodiment 1;

[0064] Figure 3 It is a schematic structural diagram of the drill pipe assembly in Embodiment 2;

[0065] Figure 4 It is a schematic structural diagram of the drill pipe assembly during operation deployment in Embodiment 2;

[0066] Figure 5 It is a cross-sectional view of the drill pipe assembly in Embodiment 2;

[0067] Figure 6 It is a schematic structural diagram of the drill pipe assembly with a second sensor provided thereon in Embodiment 2;

[0068] Figure 7 It is a schematic structural diagram of the reaming bit in Embodiment 3;

[0069] Figure 8 It is a schematic structural diagram of the reaming bit during operation deployment in Embodiment 3;

[0070] Figure 9Schematic structural diagram of the reaming bit in Embodiment 4;

[0071] Figure 10 Schematic structural diagram of the reaming bit in Embodiment 5.

[0072] Figure 11 Schematic diagram of the principle for measuring the inclination angle by the inclination angle measuring sensor in the in - hole survey device of the multi - axis rotary drilling equipment provided by the embodiment;

[0073] Figure 12 Schematic diagram of the principle for correcting the borehole deviation in the in - hole survey device applicable to the rotary drilling rig provided by Embodiment 3.

[0074] Reference signs:

[0075] 1 - lifting rope; 2 - bit; 3 - power device; 4 - muck; 10 - body; 11 - column; 12 - guide frame; 13 - telescopic structure; 20 - drill pipe assembly; 21 - sleeve rod; 21a - bottom sleeve rod; 21b - outer sleeve rod; 21c - inner sleeve rod; 22 - water pan; 30 - swivel; 31 - upper swivel part; 32 - lower swivel part; 33 - connecting pin shaft; 34 - bearing; 40 - first sensor; 41 - first power module; 42 - first communication module; 43 - second sensor; 44 - second communication module; 45 - second power module; 50 - reaming bit; 51 - main body; 52 - chassis; 53 - connecting shaft; 54 - first connecting rod; 55 - second connecting rod; 56 - mounting seat; 57 - cutter; 58 - return spring; 60 - scraper blade; 61 - slider; 62 - third connecting rod. Detailed implementation manners

[0076] The technical solutions of the present invention will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0077] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0078] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0079] The following further explains and illustrates the present invention in combination with specific embodiments.

[0080] Embodiment 1

[0081] As Figure 1 shown, a downhole inclinometer device applicable to a rotary drilling rig provided in this embodiment includes: a main body 10, a drill pipe assembly 20, a swivel 30, a hoisting rope 1, and a first sensor 40;

[0082] The drill pipe assembly 20 stands on the main body 10; a drill bit 2 is provided at the bottom of the drill pipe assembly 20;

[0083] The lower end of the swivel 30 is hinged to the drill pipe assembly 20 so as to be freely swingable back and forth and left and right, and the upper end of the swivel 30 is connected to one end of the hoisting rope 1; the hoisting rope 1 is used to lift the drill pipe assembly 20;

[0084] The first sensor 40 is arranged in the swivel 30 and is used to detect the inclination of the borehole.

[0085] Among them, the main body 10 is the body or vehicle body of a rotary drilling rig.

[0086] The hinge point between the swivel 30 and the drill pipe assembly 20 is arranged on the central axis of the drill pipe assembly 20. When the drill bit 2 is filled with muck, during the process of pulling up the drill pipe assembly 20 by the hoisting rope 1 and the swivel 30 (or pulling up a set distance), when the hoisting rope 1 and the swivel 30 are in a tensioned state, the first sensor 40 is used to detect the borehole inclination.

[0087] Since the swivel is tensioned, the axis direction of the swivel will be consistent with the axis direction of the hoisting rope and the axis of the pile hole, and its inclination can represent the overall hole inclination. The first sensor 40 in the swivel can measure the overall hole inclination angle. Thus, it can overcome the problem of serious measurement result drift caused by the prior art that the overall hole verticality is determined by measuring the inclination of each point in the borehole and then integrating, accurately measure the verticality of the borehole, take corrective measures to ensure that the verticality meets the engineering requirements, and solve the problem that the prior art fails to solve, that is, the rotary drilling rig cannot perform downhole inclinometry while drilling.

[0088] In this embodiment, the swivel 30 is connected to the drill pipe assembly 20 through a cross connector. The cross connector includes two pivot shafts arranged vertically in the horizontal projection plane. The two pivot shafts enable the swivel to be pivotally connected for forward and backward and left and right swinging.

[0089] This embodiment further includes a power device 3 for driving the drill pipe assembly 20 to rotate and move downward (downward spiral propulsion) during drilling. A column 11 is provided on the body 10, and the drill pipe assembly 20 and the power device 3 are slidably arranged on the column 11; further, a guide frame 12 is included, and one end of the guide frame 12, as a guiding structure, is slidably connected to the column 11, and the other end is fixedly connected to the drill pipe assembly 20.

[0090] In addition, a lifting mechanism (not shown) is also provided on the body 10. There are many forms of the lifting mechanism, for example, including a motor and a drum; the other end of the hoisting rope 1 is wound around the drum. The lifting mechanism can quickly lift or lower the drill pipe assembly 20 and the drill bit 2 by using the hoisting rope 1; preferably, the power device 3 also quickly rises and falls with the drill pipe assembly 20.

[0091] Among them, the power device 3, the guide frame 12 and the lifting mechanism can adopt existing technologies. For example, the power device 3 includes a driving motor, a gear transmission mechanism, etc., and tooth teeth or gear structures for cooperating with the gear transmission mechanism are provided on the outer circumference of the outermost sleeve rod at the upper part of the drill pipe assembly 20.

[0092] The column 11 is arranged on the body 10 with an adjustable inclination angle. For example, the bottom of the column 11 is pivotally connected to the body 10, and both ends of a telescopic structure 13 such as a hydraulic cylinder or an air cylinder are pivotally connected to the middle and upper part of the column 11 and the body 10 respectively. The telescopic mechanism 13 extending or retracting can adjust the inclination angle of the column 11. Preferably, the body 10 is a traveling mechanism, such as a towing vehicle, etc.

[0093] More preferably, the first sensor 40 includes an inclination measurement sensor and an azimuth measurement sensor; the azimuth measurement sensor is used to measure the angle value of the rotation of the drill pipe assembly 20 around its gravity axis; as Figure 11 shown, the inclination measurement sensor is used to measure the included angle values between two orthogonal radial axes of the drill pipe assembly 20 and the horizontal plane. Among them, the radial axes are the X and Y coordinate axes on the cross section perpendicular to the axial direction of the drill pipe assembly 20. The inclination measurement sensor can respectively measure the included angle α between the X axis and the horizontal plane and the included angle β between the Y axis and the horizontal plane.

[0094] The principle and method of measuring inclination while drilling are as follows: The drilling method of the rotary drilling rig is short footage and multiple rounds. The hoisting device 30 contains a first sensor 40. The hoisting rope 1 passes through the hoisting device 30 and lowers the drill pipe assembly 20 to the bottom of the borehole. When the drill bit 2 is filled with muck, the hoisting rope 1 pulls the drill bit 1 up a short distance through the hoisting device 30. At this time, both the hoisting rope 1 and the hoisting device 30 are in a tensioned state. The top end of the hoisting rope 1 can be regarded as a fixed point, and this point basically does not move during the drilling process of any round. And the top end of the drill pipe assembly 20 is at the center position of the pile hole at this depth. Due to the hoisting device 30 being tensioned, the axial direction of the hoisting device 30 is consistent with the axial direction of the hoisting rope 1 and the axial direction of the pile hole, and its inclination can represent the inclination of the whole hole. The first sensor 40 in the hoisting device 30 can measure the inclination angle of the whole hole. It can overcome the problem of serious drift in the measurement results caused by the existing technology of determining the verticality of the whole hole by measuring the inclination of each point in the borehole and then integrating, can accurately measure the verticality of the borehole, take corrective measures, and ensure that the verticality meets the engineering requirements. It solves the problem that the existing technology fails to solve, that is, the rotary drilling rig cannot measure inclination while drilling.

[0095] The existing inclination measurement technology cannot accurately measure the inclination value when the inclination measurement sensor is constantly rotating. This application overcomes the influence of the rotation of the drill pipe on the measurement and can measure the inclination degree of the drill pipe in three-dimensional space in real time.

[0096] Referring to Figure 2 As shown, the hoisting device 30 includes a hoisting upper part 31 and a hoisting lower part 32 that are relatively rotatable around the lifting direction; the upper end of the hoisting upper part 31 is connected to the hoisting rope 1; the bottom of the hoisting lower part 32 is connected to the drill pipe assembly 20; the first sensor 40 is arranged on the hoisting lower part 32 or the hoisting upper part 31.

[0097] Further, the hoisting lower part 32 is rotatably connected to the hoisting upper part 31 through a connecting pin shaft 33, and the axial direction of the connecting pin shaft 33 is the same as the lifting direction of the hoisting device 30. Preferably, a bearing 34 is arranged between the connecting pin shaft 33 and the shaft hole on the hoisting upper part 31 or the hoisting lower part 32. The bearing 34 can be a roller or a ball bearing.

[0098] An installation chamber for accommodating and installing the first sensor 40 is arranged in the hoisting lower part 32; a first power module 41 and a first communication module 42 are also arranged in the installation chamber. The first power module 41 and the first communication module 42 are connected to the first sensor 40 and are respectively used for power supply and communication.

[0099] A reading instrument 46 is arranged on the main body 10. The reading instrument 46 is connected to the first sensor 40 through the first communication module 42 and is used for receiving and reading the detection information of the first sensor 40.

[0100] The inclinometer device while drilling provided by the present invention solves the problem that the existing technology fails to solve, namely, the problem that the rotary drilling rig cannot measure the inclination while drilling. It can detect the verticality of the drill pipe in real time while drilling, and has good measurement accuracy of the pile-forming verticality, thus ensuring the pile-forming verticality and the quality of the engineering construction.

[0101] Embodiment 2

[0102] This embodiment is basically the same as Embodiment 1, except that:

[0103] Referring to Figure 3 As shown, in this embodiment, the drill pipe assembly 20 includes a plurality of sleeve rods 21 sleeved in sequence; the sleeve rods 21 can move relatively axially and are relatively fixed circumferentially; among the sleeve rods 21, there is a bottom sleeve rod 21a that is always at the bottom during the drilling process (that is, is arranged at the lowermost position after the drill pipe assembly 20 is fully deployed);

[0104] A drill bit 2 is connected to the lower end of the bottom sleeve rod 21a; and the lower end of the swivel 30 is hinged to the top of the bottom sleeve rod 21a so as to be able to swing freely back and forth and left and right.

[0105] Referring to Figure 4 As shown, during the drilling process, the sleeve rods 21 are gradually deployed as the drilling hole deepens. The bottom sleeve rod 21a is always at the bottom of the drilling hole. The first sensor 40 is arranged on the bottom sleeve rod 21a through the swivel 30 and continuously penetrates into the bottom of the drilling hole as the bottom sleeve rod 21a drills, so as to be able to more accurately monitor the verticality of the drilling hole at all times. And every time the drill bit 2 is lifted, the muck 4 in the drilling hole can be taken out.

[0106] A locking mechanism is arranged between two adjacent sleeve rods 21. For example, a locking pin is inserted into the pin holes on the two sleeve rods 21 to lock the two sleeve rods 21. Of course, in application, the locking mechanism can also not be arranged, and the downward screwing-in can be realized by using the self-weight of the drill bit 2 and the sleeve rods 21 or the friction force between the sleeve rods and combining with the power device 3.

[0107] The hoisting rope 1 is directly connected to the bottom sleeve rod 21a through the swivel 30. When the drill bit 2 is retracted, the sleeve rods 21 are lifted from bottom to top and from inside to outside in sequence.

[0108] Referring to Figure 5 As shown, two adjacent sleeve rods 21 include an inner sleeve rod 21c and an outer sleeve rod 21b. A guiding groove is axially arranged on the inner wall of the outer sleeve rod 21b, and a limiting block or a limiting protrusion that is in limiting and guiding cooperation with the guiding groove is arranged on the outer circle of the inner sleeve rod 21c. Thus, the circumferential limitation and the axial guiding of the two are realized.

[0109] In this embodiment, the bottom sleeve rod 21a is the innermost sleeve rod. A water tray 22 is provided at the bottom of the bottom sleeve rod 21a. The diameter of the water tray 22 is larger than the aperture of the outermost sleeve rod 21. During the lifting process, the outer sleeve rods 21b can be successively lifted by means of the water tray 22.

[0110] Referring to Figure 6 As shown, a second sensor 43 is further provided at the upper or middle part of the bottom sleeve rod 21a for detecting the inclination angle and azimuth angle of the bottom sleeve rod 21a.

[0111] Preferably, a second power module 45 and a second communication module 44 connected to the second sensor 43 are further arranged at the middle or bottom of the bottom sleeve rod 21a.

[0112] The reading instrument 46 is connected to the first sensor 40 and the second sensor 43 through the communication module, and simultaneously receives and reads the detection information of the first sensor 40 and the second sensor 43.

[0113] The second sensor 43 can measure the inclination angle and azimuth angle from its own depth to the bottom section of the drill hole. The detection values of the upper and lower two sensors of the full-hole inclination angle are obtained by the difference method. For example, in the X-axis direction of the horizontal plane, the measured value of the first sensor 40 is A, and the measured value of the second sensor 43 is B. The inclination value of the full hole in the X-axis direction is "[A×(drill hole depth - distance from the second sensor 43 to the hole bottom) + B×distance from the second sensor 43 to the hole bottom] / drill hole depth".

[0114] Embodiment 3

[0115] This embodiment is basically the same as Embodiment 1, except that:

[0116] Referring to Figure 7 and 8 As shown, this embodiment further includes a hole enlarging bit 50 for correcting the deviation of the drill hole; the hole enlarging bit 50 includes a main body 51, a chassis 52, a connecting shaft 53, a first connecting rod 54 and a second connecting rod 55; a central hole is provided on the main body 51; the upper end of the connecting shaft 53 is slidably inserted into the central hole; the chassis 52 is arranged at the bottom end of the connecting shaft 53; the upper end of the first connecting rod 54 is hinged to the main body 51; the lower end of the first connecting rod 54 is rotatably connected to the upper end of the second connecting rod 55; the lower end of the second connecting rod 55 is hinged to the chassis 52.

[0117] Among them, the lower end of the second connecting rod 55 can be directly hinged to the chassis 52, or indirectly hinged, for example, the lower end of the second connecting rod 55 is pivotally connected or hinged to the lower end of the connecting shaft 53. This embodiment includes multiple groups of the first connecting rods 54 and the second connecting rods 55 evenly arranged at intervals in the circumferential direction.

[0118] When inclination is found at the center of the drill hole, the ordinary drill bit 2 can be replaced with a reaming drill bit 50. The reaming drill bit 50 is fixed below the drill pipe or drill pipe assembly 20. The drill pipe or drill pipe assembly 20 drives the reaming drill bit 50 to move to the bottom of the drill hole. The chassis 52 abuts against the bottom of the drill hole. The drill pipe or drill pipe assembly 20 continues to move downward. The main body 51 and the chassis 52 approach each other relatively. The connecting part of the first connecting rod 54 and the second connecting rod 55 arches. Rotation drives the reaming drill bit 50 to rotate simultaneously through the drill pipe or drill pipe assembly 20. The middle connecting part of the first connecting rod 54 and the second connecting rod 55 gradually reams the bottom of the drill hole, so as to achieve the effect of correcting inclination.

[0119] The principle of inclination correction is as follows: Figure 12 As shown, the diameter of the sleeve rod 21 is smaller than the diameter of the hole, and the diameter of the drill bit 2 is basically the same as the diameter of the hole. When using the reaming drill bit 50 to ream the hole and replacing it with a drill bit 2 with a diameter smaller than that of the reaming drill bit 50, since the diameter of the hole is larger than that of the drill bit 2, there is no clamping effect on the drill bit 2, and the drill bit 2 can move freely in the hole with an enlarged diameter. Therefore, the sleeve rod 21 and the drill bit 2 will become vertical under the action of gravity and the clamping of the guide frame 12, and vertical drilling can be achieved during the subsequent drilling process.

[0120] Embodiment 4

[0121] This embodiment is basically the same as Embodiment 3, except that:

[0122] Referring to Figure 9 As shown, this embodiment further includes a mounting seat 56 and a tool 57. The lower end of the first connecting rod 54 is hinged to the upper end of the mounting seat 56, and the upper end of the second connecting rod 55 is hinged to the lower end of the mounting seat 56; the tool 57 is detachably arranged on the mounting seat 56 by means of threading or clamping, and the cutting edge of the tool 57 faces outward.

[0123] Since wear is likely to occur during use, by detaching and replacing the new tool 57, the reaming drill bit 50 can be quickly repaired.

[0124] Embodiment 5

[0125] This embodiment is basically the same as Embodiment 4, except that:

[0126] Referring to Figure 10 As shown, this embodiment further includes a return spring 58. Both ends of the return spring 58 are connected to the mounting seat 56 and the connecting shaft 53 respectively. After the return spring 58 is stretched, it tends to force the mounting seat 56 to approach the connecting shaft 53, retract the tool 57, and thus facilitate lifting the reaming drill bit 50 out of the drill hole and recycling it.

[0127] and further includes a scraper blade 60 and a third connecting rod 62, the scraper blade 60 is arranged corresponding to the second connecting rod 55 one by one. The scraper blade 60 is slidably arranged on the middle and lower part of the connecting shaft 53 through a slider 61; one end of the third connecting rod 62 is hinged to the scraper blade 60, and the other end of the third connecting rod 62 is hinged to the middle and lower part of the second connecting rod 55; the scraper blade 60 is trapezoidal; cutting edges are arranged on both the upper and lower sides.

[0128] When it is necessary to lift the reaming bit 50, if soil or gravel gets stuck between the mounting seat 56 and the connecting shaft 53, resulting in the inability to retract the mounting seat 56 and the tool 57, the reaming bit 50 can be lifted up and pressed down, so that the second connecting rod 55 swings reciprocally, and then drives the scraper blade 60 to move up and down through the third connecting rod 62, so as to loosen and remove the soil near the middle and lower part of the connecting shaft 53, and then the soil in its upper part will also loosen and fall, thus ensuring the smooth retraction of the first connecting rod 54, the second connecting rod 55 and the tool 57. Avoid soil and stones being clamped between the connecting shaft 53, the tool 57 and the connecting seat during reaming, preventing the tool 57 from retracting, and thus unable to smoothly withdraw the reaming bit 50 from the drill hole.

[0129] Embodiment 6

[0130] Refer to Figure 1 and 7 -10, the present application discloses a rotary drilling rig, which includes: a main body 10, a drill pipe or a drill pipe assembly 20, and a reaming bit 50; the reaming bit 50 is detachably arranged at the lower end of the drill pipe or the drill pipe assembly 20.

[0131] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rotary drilling rig, characterized in that, It includes: A main body, a drill pipe assembly, and a hole enlarging bit; the hole enlarging bit is detachably arranged at the lower end of the drill pipe assembly; It further includes: a swivel, a lifting rope, and a first sensor; The drill pipe assembly stands upright on the main body; The lower end of the swivel is hinged to the drill pipe assembly in a freely swingable manner in the front-back and left-right directions, and the upper end of the swivel is connected to one end of the lifting rope; the lifting rope is used to lift the drill pipe assembly; The first sensor is arranged in the swivel and is used to detect the inclination of the borehole; when the bit is filled with muck, during the process of pulling up the drill pipe assembly through the lifting rope and the swivel, when the lifting rope and the swivel are in a tensioned state, the first sensor is used to detect the inclination of the borehole; The swivel includes a upper swivel part and a lower swivel part that are relatively rotatable around the pulling direction; the upper end of the upper swivel part is connected to the lifting rope; the bottom of the lower swivel part is connected to the drill pipe assembly; the first sensor is arranged on the lower swivel part; An installation chamber for accommodating and installing the first sensor is arranged in the lower swivel part; a power module and a communication module are also arranged in the installation chamber; The hinge point between the swivel and the drill pipe assembly is arranged on the central axis of the drill pipe assembly.

2. The rotary drilling rig according to claim 1, characterized in that, The hole enlarging bit is used for borehole deviation correction; the hole enlarging bit includes a main body, a chassis, a connecting shaft, a first connecting rod, and a second connecting rod; A central hole is arranged on the main body; The upper end of the connecting shaft is slidably inserted into the central hole up and down; The chassis is arranged at the bottom end of the connecting shaft; The upper end of the first connecting rod is hinged to the main body; the lower end of the first connecting rod is rotatably connected to the upper end of the second connecting rod; The lower end of the second connecting rod is hinged to the chassis.

3. The rotary drilling rig according to claim 2, characterized in that, It includes multiple groups of the first connecting rods and the second connecting rods that are evenly spaced in the circumferential direction.

4. The rotary drilling rig according to claim 2, wherein, It further includes a mounting seat and a tool; the lower end of the first connecting rod is hinged to the upper end of the mounting seat, and the upper end of the second connecting rod is hinged to the lower end of the mounting seat; The tool is detachably arranged on the mounting seat, and the cutting edge of the tool faces outward.

5. The rotary drilling rig according to claim 4, characterized in that, It further includes a return spring, and both ends of the return spring are respectively connected to the mounting seat and the connecting shaft. After being stretched, the return spring tends to force the mounting seat to approach the connecting shaft, retract the tool, and thus facilitate the removal of the hole enlarging bit from the borehole and recovery.

6. The rotary drilling rig according to claim 2, characterized in that, It further includes a scraper and a third connecting rod. The scraper is slidably arranged on the middle and lower part of the connecting shaft through a slider; one end of the third connecting rod is hinged to the scraper, and the other end of the third connecting rod is hinged to the middle and lower part of the second connecting rod; during the swinging process of the second connecting rod, the scraper is driven to move up and down through the third connecting rod, which is used to loosen and remove the soil near the connecting shaft, so as to ensure the smooth retraction of the first connecting rod, the second connecting rod, and the tool.

7. The rotary drilling rig according to claim 6, characterized in that, The scraper is trapezoidal; scraper edges are arranged on both the upper and lower sides.

8. The rotary drilling rig according to claim 6, characterized in that, The scraper is arranged corresponding to the second connecting rod one by one.

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