Real-time measurement while drilling positioning drilling system and method

Abstract

The invention discloses a real-time measurement-while-drilling positioning drilling system and method. The real-time measurement-while-drilling positioning drilling system comprises a guiding drilling machine, a measuring support, a double-wall drilling rod connected with the guiding drilling machine, a guiding shaft fixedly connected with the end, away from the guiding drilling machine, of the double-wall drilling rod, and a drill bit connected with the guiding shaft. The guide drilling machine is provided with a first power head and a second power head. And a camera positioning device is arranged on the measuring bracket. The double-wall drill rod comprises an inner drill rod and an outer drill rod which are movably connected and concentrically arranged; the inner drill rod serves as an optical measurement channel; an annular space between the inner drill rod and the outer drill rod serves as an annular space fluid channel. The guiding shaft comprises a guiding outer cylinder, a connecting inner cylinder and a transmission shaft. A first target is arranged in the connecting inner cylinder; and the camera positioning equipment is used for shooting an image of the first target. According to the real-time measurement-while-drilling positioning drilling system and method, the gradient of the guide hole can be monitored in real time in the drilling process, deviation is corrected, and the gradient deviation of the drilled hole is not larger than 0.5%.

Description

Technical Field

[0001] The present invention relates to the field of drilling technology, and in particular to a real-time measurement while drilling positioning drilling system and method. Background Art

[0002] Anchor holes are holes drilled for laying anchor rods or cables when anchoring bridge rocks, dangerous rocks and building components. During the drilling process of anchor holes, due to the inclined construction angle and the harsh construction environment, the drilled anchor holes are often not accurate, especially the inclination deviation of the anchor holes cannot be controlled within a small range. In addition, the drilling device used to drill anchor holes needs to spend a long time to position before use, which will slow down the construction progress. Summary of the invention

[0003] In view of the deficiencies in the prior art, an object of this specification is to provide a real-time measurement while drilling positioning drilling system and method, which can monitor the inclination of the guide hole in real time during the drilling process and correct it, so that the inclination deviation of the drilled hole is no more than 0.5%.

[0004] To achieve the above-mentioned purpose, the embodiments of this specification provide a real-time measurement while drilling positioning drilling system, including: A guide drill for drilling a guide hole, the guide drill being provided with a first power head and a second power head; A measuring bracket fixedly arranged on a side of the guide drilling machine away from the guide hole, wherein a camera positioning device is arranged on the measuring bracket; A double-wall drill rod connected to the directional drilling rig, the double-wall drill rod comprising an inner drill rod and an outer drill rod movably connected and concentrically arranged; the inner drill rod is hollow, and the inner drill rod serves as an optical measurement channel for the light of the camera positioning device to pass through; the annulus between the inner drill rod and the outer drill rod serves as an annulus fluid channel; the outer drill rod is connected to the first power head, and the inner drill rod is connected to the second power head; A guide shaft fixedly connected to one end of the double-wall drill pipe away from the guide drilling rig, the guide shaft comprising a guide outer cylinder, a connecting inner cylinder and a transmission shaft, the inner drill pipe and the connecting inner cylinder are fixedly connected and concentrically arranged; the outer drill pipe and the guide outer cylinder are fixedly connected and concentrically arranged; the connecting inner cylinder is completely located in the guide outer cylinder, the connecting inner cylinder and the guide outer cylinder are rotationally connected and concentrically arranged; part of the transmission shaft is located in the guide outer cylinder, and the rest of the transmission shaft is located outside the guide outer cylinder; the part of the transmission shaft located in the guide outer cylinder is connected to the connecting inner cylinder; a first target is provided in the connecting inner cylinder, and the center of the first target coincides with the center of the connecting inner cylinder; the camera positioning device is used to capture an image of the first target A drill bit connected to the guide shaft has a diameter greater than a diameter of the outer drill rod; and a portion of the transmission shaft located outside the guide outer cylinder is connected to the drill bit.

[0005] As a preferred implementation, the height of the measuring bracket is higher than the height of the guide drilling rig.

[0006] As a preferred embodiment, the transmission shaft is connected to the connecting inner cylinder via a universal shaft; the guide outer cylinder is rotationally connected to the connecting inner cylinder via a first bearing; and the outer drill rod is rotationally connected to the inner drill rod via a second bearing.

[0007] As a preferred embodiment, the second bearing comprises a plurality of steel balls arranged along the circumferential direction; the outer drill rod is provided with two sealable inlets in the axial direction for installing the second bearing.

[0008] As a preferred embodiment, a mounting tube is fixedly provided in one end of the connecting inner tube close to the transmission shaft, and the first target is fixedly installed in the mounting tube; the first target is set as a lamp target.

[0009] As a preferred implementation, a second target is provided in the connecting inner cylinder, and the center of the second target coincides with the center of the connecting inner cylinder; the second target is located on a side of the first target away from the transmission shaft.

[0010] As a preferred embodiment, the second target is set as a prism target, and a prism is fixedly provided on the side of the second target away from the first target; the real-time measurement while drilling positioning drilling system also includes a total station for cooperating with the second target to measure the trajectory of the guide hole.

[0011] As a preferred embodiment, the real-time measurement while drilling positioning drilling system includes a plurality of the double-wall drill rods, a stabilizer is provided between adjacent double-wall drill rods, and the diameter of the drill bit is larger than the diameter of the stabilizer.

[0012] As a preferred implementation, when the rock hardness is above 100 MPa, the directional drill controls the drilling speed to 1.5 m / h.

[0013] The embodiment of this specification provides a real-time measurement while drilling positioning drilling method, the real-time measurement while drilling positioning drilling method is implemented by the real-time measurement while drilling positioning drilling system as described in any of the above embodiments, and the real-time measurement while drilling positioning drilling method includes the following steps: Fixedly installing the guide drilling rig; Connecting the drill bit, the guide shaft and the double-wall drill pipe; Adjusting the drilling inclination angle of the drill bit; Opening the first power head and the second power head to drill the pilot hole; allowing mud to enter from the annular fluid channel and carry rock cuttings from the water hole of the drill bit out of the annular space between the outer drill rod and the formation; at the same time, using the camera positioning device to take an image of the first target to determine the deviation of the drill bit; When the camera positioning device measures that the offset of the first target exceeds 0.2% of the designed trajectory, the guide correction is performed through the guide shaft; when the guide correction is performed, the first power head is turned off, the outer drill rod and the guide outer cylinder stop rotating, the inner drill rod, the connecting inner cylinder, the transmission shaft and the drill bit continue to rotate, and the inner drill rod and the outer drill rod move forward synchronously to perform the correction.

[0014] Beneficial effects:

[0015] The real-time measurement while drilling positioning drilling system provided in this embodiment can monitor the inclination of the guide hole in real time and correct the deviation during the drilling of the guide hole by setting a guide shaft including a guide outer cylinder, a connecting inner cylinder and a transmission shaft, so that the deviation of the inclination of the drilled hole is no more than 0.5%. For example, when the hole depth is 40m, the deviation of the inclination is no more than 20cm. Specifically, the transmission shaft is located between the connecting inner cylinder and the drill bit, and is used to transmit torque; a first target is provided in the connecting inner cylinder, which can be used to monitor whether the drilling hole is offset and cooperate to adjust the inclination during the correction process, so that the drilling hole inclination is quickly adjusted to the required range.

[0016] In order to solve the difficulties of high anchor hole precision requirement and low hole-making efficiency, the directional drilling rig provided in the embodiment of the present application has the advantages of strong stability, large torque and high speed. It is equipped with a dual power head (a first power head and a second power head) and can cooperate with camera positioning equipment, double-wall drill rod and guide shaft for high-precision guiding.

[0017] The real-time measurement while drilling positioning drilling system is also equipped with a double-wall drill pipe, which can enhance the rigidity and ensure the smooth progress of the drilling process. The inner drill pipe is hollow, so that the inner drill pipe can be used as an optical measurement channel, and cooperate with the camera positioning device and the first target to achieve deviation correction. The annulus between the inner drill pipe and the outer drill pipe serves as an annulus fluid channel, allowing mud to enter from the annulus fluid channel, enter the inside of the transmission shaft at the water cap, pass through the drill bit water hole, and then carry rock cuttings out of the annulus between the outer drill pipe and the formation, ensuring the smooth progress of the drilling process. In this embodiment, the outer drill pipe controls the direction, and the inner drill pipe rotates to transmit torque, directly driving the drill bit to break the rock, and can accurately control the drilling direction, greatly improving the stability, drilling efficiency and drilling accuracy of the directional drilling rig. At the same time, the directional drilling rig also provides a stable measurement while drilling channel (i.e., optical measurement channel) for the camera positioning device, improving the measurement accuracy and efficiency.

[0018] During the drilling process of the guide hole of the real-time measurement while drilling positioning drilling system, the first power head and the second power head are both turned on, and the inner drill rod and the outer drill rod rotate simultaneously; when adjusting the trajectory (correcting deviation), the first power head is turned off and the second power head is turned on, that is, the outer drill rod stops rotating, while the inner drill rod continues to rotate, and the composite drilling is changed to the guided drilling for correction.

[0019] With reference to the following description and the accompanying drawings, the specific embodiments of the present invention are disclosed in detail, indicating the manner in which the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope thereby.

[0020] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0021] It should be emphasized that the term “include / comprises” when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 A schematic diagram of the structure of a real-time measurement while drilling positioning drilling system provided in this embodiment; Figure 2 A schematic structural diagram of a directional drilling rig provided in this embodiment; Figure 3 A schematic diagram of the structure of a guide shaft provided in this embodiment; Figure 4 for Figure 3 A schematic diagram of the structure connecting the first target and the second target in the inner cylinder; Figure 5 A schematic diagram of the structure of a first target provided in this embodiment; Figure 6 A schematic diagram of the structure of a double-wall drill pipe provided in this embodiment; Figure 7 for Figure 6 The structural diagram of the second bearing; Figure 8A flowchart of the steps of a real-time measurement while drilling positioning drilling method provided in this embodiment; Fig. 9 , Fig.10 They are respectively illustrations of images taken by the camera positioning device at different drilling depths of the first target.

[0024] Description of reference numerals: 1. Guide shaft; 11. Guide outer cylinder; 12. Connecting inner cylinder; 13. Transmission shaft; 14. Universal joint; 15. First bearing; 16. Mounting cylinder; 17. First target; 18. Second target; 19. Prism; 110. Bending point; 111. Tooling; 2. Double-wall drill pipe; 21. Inner drill pipe; 22. Outer drill pipe; 221. Inlet; 23. Optical measurement channel; 24. Annular fluid channel; 25. Second bearing; 251. Steel ball; 3. Guide drilling rig; 31. First power head; 32. Second power head; 4. Measuring bracket; 5. Camera positioning equipment; 51. Light; 6. Stabilizer; 7. Drill bit. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0026] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be another element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be another element centered thereon at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] See also Figures 1 to 7The embodiment of the present application provides a real-time measurement while drilling positioning drilling system, characterized in that it includes: a guide drill rig 3, a measurement bracket 4, a double-wall drill rod 2 connected to the guide drill rig 3, a guide shaft 1 fixedly connected to one end of the double-wall drill rod 2 away from the guide drill rig 3, and a drill bit 7 connected to the guide shaft 1.

[0029] The pilot drill 3 is used to drill a pilot hole. Figure 2 As shown, the guide drill 3 is provided with a first power head 31 and a second power head 32. The measuring bracket 4 is fixedly arranged on the side of the guide drill 3 away from the guide hole. The measuring bracket 4 is provided with a camera positioning device 5. In view of the difficulties of high anchor hole precision requirements and low hole-making efficiency, the guide drill 3 provided in the embodiment of the present application has the advantages of strong stability, high torque and high speed. It is provided with a double power head (a first power head 31 and a second power head 32), which can cooperate with the camera positioning device 5, the double-wall drill rod 2 and the guide shaft 1 for high-precision guidance.

[0030] like Figure 6 As shown, the double-walled drill rod 2 includes an inner drill rod 21 and an outer drill rod 22 that are movably connected and concentrically arranged. The inner drill rod 21 is hollow, so that the inner drill rod 21 can be used as an optical measurement channel 23 for the light 51 ( Figure 1 The light 51 in the figure is for illustration only. In actual use, the light 51 is not visible to the naked eye) passes through, and cooperates with the camera positioning device 5 and the first target 17 of the guide shaft 1 to achieve deviation correction. The annulus between the inner drill rod 21 and the outer drill rod 22 serves as an annulus fluid channel 24, allowing mud to enter from the annulus fluid channel 24, enter the inside of the transmission shaft 13 at the water cap, pass through the water eye of the drill bit 7, and then carry rock cuttings out from the annulus between the outer drill rod 22 and the formation to ensure that the drilling process proceeds smoothly. The outer drill rod 22 is connected to the first power head 31, and the first power head 31 drives the outer drill rod 22 to rotate and move forward to control the drilling direction. The inner drill rod 21 is connected to the second power head 32, and the second power head 32 drives the inner drill rod 21 to rotate and move forward. The diameter of the drill bit 7 is larger than the diameter of the outer drill rod 22, ensuring that the mud carrying rock cuttings can return from the annulus between the outer drill rod 22 and the formation.

[0031] The real-time measurement while drilling positioning drilling system can enhance rigidity and ensure smooth drilling process by setting up a double-walled drill pipe 2. The double-walled drill pipe 2 has strong rigidity and high torque transmission efficiency. It is used for the first time in China with a camera positioning device 5. While transmitting power to the drill bit 7, it can provide a dry and centered optical measurement channel 23 to achieve measurement while drilling during the drilling process.

[0032] like Figure 3As shown, the guide shaft 1 includes a guide outer cylinder 11, a connecting inner cylinder 12 and a transmission shaft 13. The end of the inner drill rod 21 away from the guide drill 3 is fixedly connected to the connecting inner cylinder 12 and is concentrically arranged. The end of the outer drill rod 22 away from the guide drill 3 is fixedly connected to the guide outer cylinder 11 and is concentrically arranged. The connecting inner cylinder 12 is completely located in the guide outer cylinder 11, the connecting inner cylinder 12 is used to transmit torque, and the guide outer cylinder 11 is used for guiding. The connecting inner cylinder 12 and the guide outer cylinder 11 are rotatably connected and concentrically arranged. Part of the transmission shaft 13 is located in the guide outer cylinder 11, and the rest of the transmission shaft 13 is located outside the guide outer cylinder 11. The part of the transmission shaft 13 located in the guide outer cylinder 11 is connected to the connecting inner cylinder 12. The part of the transmission shaft 13 located outside the guide outer cylinder 11 is connected to the drill bit 7, and the transmission shaft 13 can continue to transmit the torque transmitted by the connecting inner cylinder 12 to the drill bit 7. The connecting inner cylinder 12 is provided with a first target 17, the center of which coincides with the center of the connecting inner cylinder 12. The first target 17 is used to monitor whether the drilling hole is offset and to adjust the inclination in the process of correcting the deviation, so that the drilling inclination is quickly adjusted to the required range. The camera positioning device 5 is used to capture the image of the first target 17, and the entire drilling process of the first target 17 can be observed. The light 51 of the camera positioning device 5 passes through the optical measurement channel 23, and then captures the image of the first target 17. The captured image is as shown in FIG. Fig. 9 , Fig.10 shown.

[0033] The guide shaft 1 provided in the embodiment of the present application has guiding, measuring and shock absorbing functions. It is the first high-inclination guide shaft 1 used in China. It can timely measure and correct the deviation during the drilling of the guide hole, so that the inclination deviation of the drilled hole is no more than 0.5%. For example, when the hole depth is 40m, the inclination deviation is no more than 20cm.

[0034] In this embodiment, the outer drill rod 22 and the guide outer cylinder 11 control the drilling direction, the inner drill rod 21, the connecting inner cylinder 12 and the transmission shaft 13 rotate to transmit torque, directly drive the drill bit 7 to break the rock, and can accurately control the drilling direction, greatly improving the stability, drilling efficiency and drilling accuracy of the guide drill rig 3. At the same time, the guide drill rig 3 also provides a stable downhole measurement channel (i.e., the optical measurement channel 23) for the camera positioning device 5, thereby improving the measurement accuracy and efficiency.

[0035] During the drilling process of the guide hole of the real-time measurement while drilling positioning drilling system, the first power head 31 and the second power head 32 are both turned on, and the inner drill rod 21 and the outer drill rod 22 rotate simultaneously; when adjusting the trajectory (correction), the first power head 31 is turned off and the second power head 32 is turned on, that is, the outer drill rod 22 stops rotating, and the inner drill rod 21 continues to rotate, and the composite drilling is changed to the guide drilling for correction. That is, the real-time measurement while drilling positioning drilling system has a drilling state and a correction state. When the real-time measurement while drilling positioning drilling system is in the drilling state, the first power head 31 and the second power head 32 are both turned on, and the outer drill rod 22 and the inner drill rod 21 are driven to rotate respectively, the outer drill rod 22 drives the guide outer cylinder 11 to rotate, and the inner drill rod 21 drives the connecting inner cylinder 12, the transmission shaft 13 and the drill bit 7 to rotate. When the real-time measurement while drilling positioning drilling system is in the deviation correction state, the first power head 31 is turned off, the second power head 32 is turned on, the outer drill rod 22 stops rotating, and the inner drill rod 21 continues to rotate, driving the connecting inner tube 12, the transmission shaft 13 and the drill bit 7 to rotate and correct the deviation.

[0036] In this embodiment, the height of the measuring bracket 4 is higher than that of the guiding drill 3, so that the camera positioning device 5 can smoothly monitor the offset of the first target 17. The bottom surfaces of the measuring bracket 4 and the guiding drill 3 are located on the same horizontal plane.

[0037] like Figure 3 As shown, the transmission shaft 13 is connected to the connecting inner cylinder 12 via a universal shaft 14, so that a bending point 110 can be formed between the transmission shaft 13 and the connecting inner cylinder 12, that is, a certain angle, such as 1°, can be formed between the transmission shaft 13 and the connecting inner cylinder 12, so that the drill bit 7 connected to the transmission shaft 13 can not only rotate around the central axis of the drill bit 7 body, but also have a certain swing, so as to achieve a better drilling effect.

[0038] like Figure 4 As shown, a mounting tube 16 is fixedly disposed at one end of the connecting inner tube 12 close to the transmission shaft 13, and the first target 17 is fixedly mounted in the mounting tube 16. Figure 5 As shown, the first target 17 is preferably set as a lamp target, on which a plurality of asymmetrically arranged luminous LED lamp beads are arranged. The lamp target is a self-luminous target, and is provided with a plurality of luminous lamp beads, and there is a farthest point LED lamp bead, which can be easily photographed and identified. The farthest point LED lamp bead is 2 cm away from the center of the lamp target. The camera positioning device 5 is used on the measuring bracket 4 to capture the luminous image of the first target 17, so as to determine the deviation of the drill bit 7.

[0039] In one embodiment, a second target 18 is further provided in the connecting inner cylinder 12, and the center of the second target 18 coincides with the center of the connecting inner cylinder 12. The second target 18 is located on the side of the first target 17 away from the transmission shaft 13, and the second target 18 can cooperate with a total station to determine whether the drilled hole is offset.

[0040] Specifically, the second target 18 is set as a prism target, and a prism 19 is fixedly provided on the side of the second target 18 away from the first target 17. The prism 19 is fixedly installed in the mounting tube 16 by means of a tool 111. The real-time measurement while drilling positioning drilling system also includes a total station for cooperating with the second target 18 to measure the trajectory of the guide hole. In order to avoid failure of the first target 17 and the camera positioning device 5, after drilling a certain distance, the inclination of the drilled hole can be measured by the second target 18, the prism 19 and the total station to ensure that the inclination of the drilled hole meets the requirements. By adopting the first target 17 and the camera positioning device 5, the measurement review frequency is increased, and the trajectory is re-measured with the assistance of the total station and the second target 18, and deviations are corrected frequently to ensure that the drilling accuracy meets the design requirements.

[0041] like Figure 3 As shown, the guide outer cylinder 11 is rotatably connected to the connecting inner cylinder 12 via a first bearing 15. The first bearing 15 may be a TC series bearing. A straightening sleeve for straightening may be provided on the guide outer cylinder 11.

[0042] In view of the difficulty of rock breaking and low efficiency caused by the high strength of slightly weathered dacite, the material of the drill bit 7 is made of high-quality diamond composite sheets, combined with personalized design, to improve the rock breaking efficiency and anti-abrasion ability. That is, the drill bit 7 is preferably a PDC (polycrystalline diamond composite sheet) drill bit 7. In this embodiment, when the rock hardness is above 100 MPa, the guide drill 3 controls the drilling speed to 1.5 meters / hour to ensure smooth drilling.

[0043] In this embodiment, the outer drill rod 22 is rotatably connected to the inner drill rod 21 via a second bearing 25, so that the inner drill rod 21 is centered on the outer drill rod 22. Figure 7 As shown, the second bearing 25 includes a plurality of steel balls 251 arranged along the circumferential direction. Figure 6 As shown, the outer drill rod 22 is provided with two sealable inlets 221 in the axial direction for installing the second bearing 25. A plurality of steel balls 251 enter between the outer drill rod 22 and the inner drill rod 21 from the inlets 221. After the steel balls 251 are installed, the inlets 221 are sealed.

[0044] Specifically, the real-time measurement while drilling positioning drilling system includes a plurality of double-walled drill pipes 2, and a centralizer 6 is provided between adjacent double-walled drill pipes 2. The diameter of the drill bit 7 is larger than the diameter of the centralizer 6, ensuring that the mud carrying the cuttings can be returned from the annulus between the outer drill pipe 22 and the formation.

[0045] In a specific application scenario, the extension of the double-wall drill pipe 2 is assisted by a crane. During drilling, mud enters from the annular fluid channel 24 between the double-wall drill pipes 2 and returns from the water hole of the drill bit 7 with rock cuttings. During the drilling of the guide hole, the surveyor monitors the drilling trajectory through the camera positioning device 5, and uses the camera positioning device 5 to observe the entire drilling process of the first target 17 placed in the center of the guide shaft 1. The measurement interval before drilling is 0.5m to 2m, the measurement interval from 10m to 20m is 3m, and the measurement interval after 20m does not exceed 5m. Stop drilling before measurement, measure the offset of the first target 17, and if the deviation from the designed trajectory exceeds 0.2%, adjust it in time through the guide shaft 1. The three-dimensional drilling trajectory can be drawn for comparison with the designed trajectory. If there is a trajectory deviation, correct it in time through the guide shaft 1. During the guide correction, the outer drill pipe 22 stops rotating and the tool face is determined; the inner drill pipe 21 continues to rotate. The inner and outer drill pipes 22 move forward synchronously for correction. During the drilling process, the gyro inclinometer can be used to remeasure the trajectory at any time.

[0046] In one embodiment, the diameter of the drill bit 7 may be 241.3 mm, the diameter of the double-wall drill pipe 2 may be 168 mm, and the diameter of the centralizer 6 may be 238 mm.

[0047] Based on the same concept, a real-time measurement while drilling positioning drilling method is also provided in the embodiment of the present invention, as described in the following embodiment. It should be noted that the real-time measurement while drilling positioning drilling method is implemented by the real-time measurement while drilling positioning drilling system described in any of the above embodiments. The drilling method implementation method corresponds to the drilling system implementation method, which can solve the technical problems solved by the drilling system implementation method and correspondingly achieve the technical effects of the drilling system implementation method. The specific application will not be repeated here.

[0048] like Figure 8 As shown, the real-time measurement while drilling positioning drilling method comprises the following steps: Step S10: Fix and install the guide drilling machine 3.

[0049] Step S20: Connect the drill bit 7, the guide shaft 1 and the double-wall drill pipe 2.

[0050] Step S30: adjusting the drilling inclination angle of the drill bit 7.

[0051] Step S40: Open the first power head 31 and the second power head 32 to drill the guide hole.

[0052] In step S40, mud is allowed to enter from the annular fluid channel 24, and carries cuttings from the water hole of the drill bit 7 back out from the annular space between the outer drill rod 22 and the formation; at the same time, the camera positioning device 5 is used to take an image of the first target 17 to determine the deviation of the drill bit 7.

[0053] Step S50: When the camera positioning device 5 measures that the offset of the first target 17 exceeds the designed trajectory by 0.2%, the guide shaft 1 is used for guiding correction.

[0054] In step S50, when guiding deviation correction is performed, the first power head 31 is turned off, the outer drill rod 22 and the guide outer cylinder 11 stop rotating, the inner drill rod 21, the connecting inner cylinder 12, the transmission shaft 13 and the drill bit 7 continue to rotate, and the inner drill rod 21 and the outer drill rod 22 move forward synchronously to perform deviation correction.

[0055] It should be noted that, in the description of this specification, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, and they cannot be understood as indicating or implying relative importance. In addition, in the description of this specification, unless otherwise specified, the meaning of "plurality" is two or more.

[0056] Any numerical value cited herein includes all values ​​of lower and upper values ​​that increase by one unit from the lower limit to the upper limit, and there is at least a two-unit interval between any lower value and any higher value. For example, if the value of the quantity of a component or a process variable (such as temperature, pressure, time, etc.) is set forth to be from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, the purpose is to illustrate that values ​​such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also explicitly listed in the specification. For values ​​less than 1, one unit is appropriately considered to be 0.0001, 0.001, 0.01, 0.1. These are merely examples that are intended to be clearly expressed, and it can be considered that all possible combinations of numerical values ​​listed between the lowest value and the highest value are clearly set forth in the specification in a similar manner.

[0057] Unless otherwise indicated, all ranges include the endpoints and all numbers between the endpoints. "About" or "approximately" used with a range applies to both endpoints of the range. Thus, "about 20 to 30" is intended to cover "about 20 to about 30", including at least the specified endpoints.

[0058] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for all purposes. The term "consisting essentially of..." to describe a combination should include the identified elements, ingredients, parts or steps and other elements, ingredients, parts or steps that do not substantially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe a combination of elements, ingredients, parts or steps herein also contemplates embodiments that consist essentially of these elements, ingredients, parts or steps. By using the term "may", it is intended to indicate that any attribute described that "may" include is optional.

[0059] Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step can be divided into separate multiple elements, ingredients, parts or steps. The disclosure "one" or "an" used to describe an element, ingredient, part or step is not intended to exclude other elements, ingredients, parts or steps.

[0060] It should be understood that the above description is for illustration and not for limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but should be determined with reference to the appended claims and the full scope of equivalents possessed by such claims. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to be a waiver of the subject matter, nor should it be considered that the inventors did not consider the subject matter to be part of the disclosed inventive subject matter.

Claims

1. A real-time measurement while drilling positioning drilling system, characterized in that: include: A directional drilling rig provided with a first power head and a second power head; A measuring bracket fixedly arranged on one side of the directional drilling rig, the measuring bracket being provided with a camera positioning device; A double-wall drill rod connected to the directional drilling rig includes an inner drill rod and an outer drill rod movably connected and concentrically arranged; the inner drill rod is hollow; the outer drill rod is connected to a first power head, and the inner drill rod is connected to a second power head; The guide shaft fixedly connected to the end of the double-wall drill pipe away from the guide drilling machine includes a guide outer cylinder, a connecting inner cylinder and a transmission shaft, the inner drill pipe and the connecting inner cylinder are fixedly connected and concentrically arranged; the outer drill pipe and the guide outer cylinder are fixedly connected and concentrically arranged; the connecting inner cylinder is completely located in the guide outer cylinder, the connecting inner cylinder and the guide outer cylinder are rotationally connected and concentrically arranged; the part of the transmission shaft located in the guide outer cylinder is connected to the connecting inner cylinder, and the rest of the transmission shaft is located outside the guide outer cylinder; a first target is arranged in the connecting inner cylinder, and the center of the first target coincides with the center of the connecting inner cylinder; The drill bit connected to the guide shaft has a diameter larger than the diameter of the outer drill rod; the part of the transmission shaft located outside the guide outer cylinder is connected to the drill bit.

2. The real-time measurement while drilling positioning drilling system according to claim 1, characterized in that: The height of the measuring bracket is higher than the height of the guide drilling rig.

3. The real-time measurement while drilling positioning drilling system according to claim 1, characterized in that: The transmission shaft is connected to the connecting inner cylinder via a universal shaft; the guide outer cylinder is rotatably connected to the connecting inner cylinder via a first bearing; and the outer drill rod is rotatably connected to the inner drill rod via a second bearing.

4. The real-time measurement while drilling positioning drilling system according to claim 3 is characterized in that: The second bearing comprises a plurality of steel balls arranged in a circumferential direction; the outer drill rod is provided with two sealable inlets in the axial direction for installing the second bearing.

5. The real-time measurement while drilling positioning drilling system according to claim 1, characterized in that: A mounting tube is fixedly provided at one end of the connecting inner tube close to the transmission shaft, and the first target is fixedly installed in the mounting tube; the first target is set as a lamp target.

6. The real-time measurement while drilling positioning drilling system according to claim 5, characterized in that: A second target is arranged in the connecting inner cylinder, and the center of the second target coincides with the center of the connecting inner cylinder; the second target is located on a side of the first target away from the transmission shaft.

7. The real-time measurement while drilling positioning drilling system according to claim 6, characterized in that: The second target is set as a prism target, and a prism is fixedly provided on the side of the second target away from the first target; the real-time measurement while drilling positioning drilling system also includes a total station for cooperating with the second target to measure the trajectory of the guide hole.

8. The real-time measurement while drilling positioning drilling system according to claim 1, characterized in that: The real-time measurement while drilling positioning drilling system comprises a plurality of the double-wall drill rods, and a stabilizer is arranged between adjacent double-wall drill rods. The diameter of the drill bit is larger than the diameter of the stabilizer.

9. The real-time measurement while drilling positioning drilling system according to claim 1, characterized in that: When the rock hardness is above 100 MPa, the directional drill controls the drilling speed to 1.5 m / h.

10. A real-time measurement while drilling positioning drilling method, characterized in that: The real-time measurement while drilling positioning drilling method is implemented by the real-time measurement while drilling positioning drilling system according to any one of claims 1 to 9, and the real-time measurement while drilling positioning drilling method comprises the following steps: Fixedly installing the guide drilling rig; Connecting the drill bit, the guide shaft and the double-wall drill pipe; Adjusting the drilling inclination angle of the drill bit; Opening the first power head and the second power head to drill the pilot hole; allowing mud to enter from the annular fluid channel and carry rock cuttings from the water hole of the drill bit out of the annular space between the outer drill rod and the formation; at the same time, using the camera positioning device to take an image of the first target to determine the deviation of the drill bit; When the camera positioning device measures that the offset of the first target exceeds 0.2% of the designed trajectory, the guide correction is performed through the guide shaft; when the guide correction is performed, the first power head is turned off, the outer drill rod and the guide outer cylinder stop rotating, the inner drill rod, the connecting inner cylinder, the transmission shaft and the drill bit continue to rotate, and the inner drill rod and the outer drill rod move forward synchronously to perform the correction.

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