CN112431586B - Method and device for acquiring data in cable transient electromagnetic probe drilling - Google Patents
Method and device for acquiring data in cable transient electromagnetic probe drilling Download PDFInfo
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- CN112431586B CN112431586B CN202011277909.3A CN202011277909A CN112431586B CN 112431586 B CN112431586 B CN 112431586B CN 202011277909 A CN202011277909 A CN 202011277909A CN 112431586 B CN112431586 B CN 112431586B
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- 230000001052 transient effect Effects 0.000 title claims abstract description 106
- 239000000523 sample Substances 0.000 title claims abstract description 92
- 238000005553 drilling Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000004891 communication Methods 0.000 claims abstract description 49
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000004677 Nylon Substances 0.000 claims abstract description 8
- 229920001778 nylon Polymers 0.000 claims abstract description 8
- 229910052755 nonmetal Inorganic materials 0.000 claims description 65
- 239000002184 metal Substances 0.000 claims description 28
- 238000005259 measurement Methods 0.000 claims description 6
- 239000012811 non-conductive material Substances 0.000 claims description 4
- 229920000049 Carbon (fiber) Polymers 0.000 description 6
- 239000004917 carbon fiber Substances 0.000 description 6
- 238000001514 detection method Methods 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/003—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings with electrically conducting or insulating means
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/028—Electrical or electro-magnetic connections
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/046—Couplings; joints between rod or the like and bit or between rod and rod or the like with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Geophysics (AREA)
- Remote Sensing (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses a method and a device for acquiring data in a cabled transient electromagnetic probe drill hole, wherein the method embeds the transient electromagnetic probe in a high-strength nylon drill rod; the two ends of the drill rod embedded with the transient electromagnetic probe tube are both drill rods made of the same material, so that the probe tube is free of conductive medium in a certain range; arranging communication cables in sections inside a drill rod, and connecting adjacent communication cables through waterproof plugs; the drill rod and the communication cable are respectively connected section by section and pushed into the drill hole by using the drilling machine; after the transient electromagnetic probe is pushed to a specified position, the orifice communication cable is connected with the transient electromagnetic receiver to acquire data. The invention uses the drilling machine as a power source, uses the high-strength nylon drill rod to protect the transient electromagnetic probe pipe, connects the communication cable in sections to enable the drill rod to rotatably push, solves the problems of power source, hole clamping risk, probe pipe safety, pushing efficiency and the like in long-distance drilling pushing of the cable transient electromagnetic probe pipe, and provides a practical way for data acquisition of drilling transient electromagnetic in horizontal drilling and L-shaped drilling.
Description
Technical Field
The invention belongs to the technical field of geophysical exploration, relates to a transient electromagnetic probe in-drilling pushing technology necessary for a drilling transient electromagnetic method, and particularly relates to a method and a device for acquiring data in a cabled transient electromagnetic probe in-drilling.
Background
The transient electromagnetic method is based on Faraday electromagnetic induction phenomenon, and adopts a receiving device to observe an induction secondary field of an underground target body to achieve the detection purpose by manually establishing an electromagnetic field to excite the underground target body. The transient electromagnetic method plays an important role in groundwater detection, mineral exploration, geological and environmental investigation and solving engineering geological problems, and is an important geophysical detection method. According to the different working sites, the method is divided into a ground transient electromagnetic method and a mine transient electromagnetic method. The two respectively excite and collect signals in the ground and mine laneway. Because the social infrastructure develops rapidly, electromagnetic noise sources such as ground transmission lines, residential areas, communication signal towers and the like are visible everywhere, and various ironware such as heading machines, anchor net anchors, pipelines and the like in underground roadways are also difficult to avoid. These sources of interference affect the normal implementation of ground and mine transient electromagnetic methods, reducing the accuracy of the detection results.
To avoid the above-mentioned disadvantages, a borehole transient electromagnetic method in which a receiving device is disposed in a borehole, or in which both a transmitting device and a receiving device are disposed in a borehole, has become a potential method for development. Because the borehole is positioned in the stratum and is closer to the target body, the electromagnetic sensor can acquire stronger abnormal signals while avoiding electromagnetic noise interference. The inherent advantages of working devices make this approach a hotspot for recent research. At the same time, how to push the probe containing the receiving device or the transmitting device into the borehole becomes a key to restrict the implementation of the method.
And the transient electromagnetic probe can enter the drilled hole by taking gravity as a power source for vertical drilling or large-angle inclined drilling. When the borehole inclination is small or horizontal, special thrust is required to be applied as a power source to feed the probe into the borehole.
The exploring tube is connected with the short-joint carbon fiber rod, pushing force is manually applied to the carbon fiber rod at the orifice, and a new short-joint carbon fiber rod is continuously connected, so that the exploring tube can be gradually pushed into the drill hole. This method is suitable for near horizontal drilling, with a maximum push distance of about 200m. When the bore wall collapses or is not smooth Yi Kakong, there is a risk of probe loss. The invention patent application numbers CN201810963701.3, CN201520843764.7 and CN201520844702.8 are related to the pushing method or are improved to some extent, but the disadvantages and risks of the method are not solved.
In order to solve the pushing problem of the transient electromagnetic probe in the near horizontal hole, canadian CRONE company tries to realize long-distance pushing by using the combination of the hollow drill rod, the slurry pump and Kong Demao. Firstly, pushing a hollow inner flat drill rod to the bottom of a hole; a hole bottom anchor with a piston is placed at the hole opening of the drilling hole, and the rear end of the hole bottom anchor is connected with a pulley and a pull rope; pumping the hole bottom anchor to the bottom of the drilling hole by using a slurry pump to fix Kong Demao; the transient electromagnetic probe tube is connected with the stay cord, and the probe tube enters the bottom of the drill hole through pulling of the two ends of the stay cord; taking out part or all drill rods step by step, so that the near part of the probe tube is free of ferromagnetic materials, and the requirements of transient electromagnetic detection environments are met; pulling the pull rope to enable the probe tube to be positioned at different positions in the drill hole, and collecting transient electromagnetic data. The method can push the transient electromagnetic probe in near-horizontal and long-distance drilling, and the risk is that a long-distance stay cord is easy to wind, and the probe is lost due to power failure. In addition, as the probe tube is not protected by the outer layer, the hole is easily blocked due to collapse or unsmooth hole wall, and the risk of losing the probe is generated.
The invention patent with the application number of CN201910520299.6 provides a mining drilling radar fine detection device and method based on drilling machine pushing. The patent is characterized in that two ends of a cable-free drilling radar instrument are respectively connected with a nonmetal non-conductive drill rod, then the front end of the cable-free drilling radar instrument is connected with a drill bit, the rear end of the cable-free drilling radar instrument is connected with a metal drill rod, and pushing of the drilling radar instrument in a drilled hole is realized through pushing of the drill rod by the drill. The patent may achieve a push distance of greater than 500m. The drilling radar instrument adopts a working mode without cable connection and capable of automatically collecting data, so that the drilling radar instrument is not applicable to a cable transient electromagnetic probe. In addition, as the two ends of the probe tube are directly connected with the nonmetallic nonconductive drill rod, the transient electromagnetic probe tube is easy to damage due to the fact that the transient electromagnetic probe tube cannot bear the propelling force and the rotating force in the pushing process.
According to the current development status of the current drilling transient electromagnetic instrument, a cable is connected between the probe tube for collecting data and the receiver. Drilling transient electromagnetic data acquisition is carried out in vertical drilling or large-angle inclined drilling, and the probe tube can be lowered and recovered through an armored communication cable. Current pushing technology cannot push a cabled transient electromagnetic probe into a borehole of a longer distance, mainly limited by power, hole jamming risk and conductive medium influence. The pushing method using the carbon fiber rod has the advantages that the power is limited, the long-distance pushing cannot be realized, the risk of hole blocking exists, and the carbon fiber rod is a conductive medium and does not meet the transient electromagnetic data acquisition requirement; when the hole bottom anchor is used, the pull rope is easy to wind, so that the pulling function of the probe tube is lost, the probe tube is placed in the bare hole, and the risk of hole clamping exists; the probe tube is directly connected with the drill rod to be pushed, so that the probe tube is easy to damage due to the thrust and torsion in the pushing process, and the common drill rod is made of metal medium and does not meet the transient electromagnetic data acquisition requirement. Therefore, the pushing requirements of the cable transient electromagnetic probe are not fully considered in the currently disclosed pushing methods, and the tasks of pushing and collecting data cannot be completed.
Disclosure of Invention
Aiming at the defects and shortcomings in the prior art, the invention provides a method and a device for acquiring data in a borehole of a cable transient electromagnetic probe, so that the cable transient electromagnetic probe can be safely pushed into a long-distance borehole, and the borehole transient electromagnetic data acquisition is realized.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The device for acquiring data in the borehole of the cable transient electromagnetic probe comprises the following components which can be connected in sequence: the transient electromagnetic probe, a plurality of sections of communication cables which can be connected in sequence and a transient electromagnetic receiver arranged outside the drilling hole; the method further comprises the following steps of: the drill comprises a drill bit, a metal drill rod, a plurality of non-metal non-conductive drill rods connected in sequence and a plurality of metal drill rods connected in sequence, wherein each drill rod is of a hollow structure;
The transient electromagnetic probe tube is arranged in the non-metal non-conductive drill rod, and the front and the back of the non-metal non-conductive drill rod where the transient electromagnetic probe tube is arranged are connected with non-metal non-conductive drill rods with the same material; the communication cables are respectively arranged in the drill rods and correspond to the drill rods one by one, and two sections of communication cables of adjacent drill rods are connected through waterproof plugs.
The invention also comprises the following technical characteristics:
specifically, the nonmetal nonconductive drill rod is made of nonconductive, nonmagnetic and high-strength nylon materials.
Specifically, a buffer layer is filled between the outer wall of the transient electromagnetic probe and the inner wall of the nonmetal non-conductive drill rod.
Specifically, the length of the transient electromagnetic probe is smaller than the length of the nonmetallic nonconductive electric drill rod.
Specifically, the length of the nonmetallic nonconductive electric drill is smaller than the length of the communication cable.
Specifically, a bayonet is arranged on the inner wall of each drill rod end.
Specifically, the bayonet is of a cylindrical structure of a central through hole made of non-metal non-conductive materials.
Specifically, the adjacent metal drill rods, the non-metal non-conductive drill rods and the adjacent non-metal non-conductive drill rods are in threaded connection.
A method for acquiring data in a cabled transient electromagnetic probe borehole comprises the following steps:
a: after the metal drill rod is connected with the drill bit, the metal drill rod is put into a drill hole;
B: connecting the nonmetal nonconductive drill rod with the metal drill rod in the drill hole, and putting the nonmetal nonconductive drill rod into the drill hole;
c: determining the number of the non-metal non-conductive drill rods to be put into according to the length of the non-metal non-conductive drill rods so as to meet the total length of 20m of the non-metal non-conductive drill rods at the front end;
D: connecting a nonmetal nonconductive drill rod embedded with a transient electromagnetic probe with a nonmetal nonconductive drill rod in a drill hole, and putting the drill hole into the drill hole;
E: connecting a nonmetal nonconductive drill rod embedded with a communication cable with a nonmetal nonconductive drill rod in a drill hole, and ensuring that the communication cables in the two nonmetal nonconductive drill rods are connected through a waterproof plug and then are put into the drill hole;
F: according to the length of the nonmetallic nonconductive drill pipes, determining the number of nonmetallic nonconductive drill pipes which are continuously put into the embedded communication cable so as to meet the total length of the nonmetallic nonconductive drill pipes at the rear end by 20m;
G: connecting a metal drill rod embedded with a communication cable with a nonmetal non-conductive drill rod in a drill hole, and ensuring that the communication cables in the two sections of drill rods are connected through a waterproof plug and then are put into the drill hole;
H: repeating the step G until the transient electromagnetic probe reaches a designated measurement position;
i: connecting the orifice communication cable with the transient electromagnetic receiver, and controlling the transient electromagnetic probe to acquire data through the transient electromagnetic receiver;
J: g, disconnecting the orifice communication cable from the transient electromagnetic receiver, continuing to step G until the transient electromagnetic probe reaches another designated measuring position, and repeating the step I;
k: repeating the step J until the data acquisition of all the measurement positions is completed;
L: disconnecting the orifice communication cable and the transient electromagnetic receiver, taking out drill rods section by section, and disconnecting the cable between the drill rods until all the drill rods are taken out;
M: the transient electromagnetic probe can also be pushed to the furthest end of the drill hole and then data can be acquired in the process of exiting the drill rod.
Compared with the prior art, the invention has the beneficial technical effects that:
(1) Because the drilling machine and the drill rod are adopted for pushing, the pushing distance can be consistent with the drilling length in theory, and the pushing distance is long.
(2) Because the drilling machine and the drill rod are adopted for pushing, the risk of hole blocking is not easy to occur due to slight hole collapse or uneven hole wall in the hole, and the success rate of pushing and the safety of the transient electromagnetic probe are ensured.
(3) Because the transient electromagnetic probe tube is embedded in the non-metal non-conductive drill rod made of high-strength nylon, the drilling machine can apply torsion or propelling force to ensure smooth drilling, and the applied torsion or propelling force is borne by the non-metal non-conductive drill rod, so that the transient electromagnetic probe tube is protected and is not easy to damage.
(4) The drill rod embedded with the transient electromagnetic probe tube is made of non-conductive high-strength nylon material, but not conductive carbon fiber material, and the drill rod is made of the non-conductive high-strength nylon material within a certain range of the front end and the rear end, so that no conductive medium exists within a certain range of the transient electromagnetic probe tube, and the transient electromagnetic probe tube meets the requirements of transient electromagnetic data acquisition.
(5) The cable connected with the transient electromagnetic probe tube adopts a sectional type, each section is built in the drill rod, and each section is connected by a waterproof joint, so that the drilling pushing of the cable transient electromagnetic probe tube is realized.
(6) The invention is suitable for any drilling of holes in the ground or underground including L-shaped drilling.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic illustration of the installation of a communication cable, transient electromagnetic probe, and metallic drill pipe, and nonmetallic nonconductive drill pipe;
FIG. 3 is a schematic illustration of a transient electromagnetic probe embedded within a nonmetallic nonconductive drill pipe;
FIG. 4 is a block diagram of a drill pipe with a built-in communication cable;
fig. 5 is a schematic illustration of the connection of communication cables between drill pipes.
Reference numerals meaning:
1. The drilling machine comprises a transient electromagnetic probe, a communication cable, a transient electromagnetic receiver, a drill bit, a metal drill rod, a nonmetal non-conductive drill rod, a waterproof plug, a buffer layer, a bayonet and a drilling machine.
The invention is described in detail below with reference to the drawings and the detailed description.
Detailed Description
The following specific embodiments of the present application are given according to the above technical solutions, and it should be noted that the present application is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solutions of the present application fall within the protection scope of the present application. The present application will be described in further detail with reference to examples.
Example 1:
As shown in fig. 1 to 5, the embodiment provides a device for collecting data in a borehole of a cabled transient electromagnetic probe, which comprises: the transient electromagnetic probe 1, a plurality of sections of communication cables 2 which can be connected in sequence and a transient electromagnetic receiver 3 which is arranged outside a borehole; the method further comprises the following steps of: the drill bit 4, the metal drill rod 5, a plurality of non-metal non-conductive drill rods 6 which are connected in sequence and a plurality of metal drill rods 5 which are connected in sequence, wherein each drill rod is of a hollow structure; the transient electromagnetic probe 1 is arranged in a non-metal non-conductive drill rod 6, and the non-metal non-conductive drill rod 6 with the same material is connected to the front and back of the non-metal non-conductive drill rod 6 where the transient electromagnetic probe 1 is arranged; the communication cables 2 are respectively arranged in the drill rods and correspond to the drill rods one by one, and two sections of communication cables 3 of adjacent drill rods are connected through waterproof plugs 8.
The nonmetal nonconductive drill pipe 6 is made of nonconductive, nonmagnetic and high-strength nylon; the device can be connected with a metal drill rod to perform rotary drilling and push drilling in a borehole while avoiding metal body interference transient electromagnetic data acquisition.
A buffer layer 9 is filled between the outer wall of the transient electromagnetic probe 1 and the inner wall of the nonmetal nonconductive drill rod 6, and the buffer layer 9 is made of elastic nonconductive materials, can fix the probe and separate vibration in the pushing process so as to protect the probe.
The length of the transient electromagnetic probe 1 is smaller than that of the nonmetal nonconductive drill pipe 6, and the transient electromagnetic probe 1 and the nonmetal nonconductive drill pipe 6 are coaxially arranged so as to embed the transient electromagnetic probe 1 in the nonmetal nonconductive drill pipe 6.
The length of the non-metallic, non-conductive drill pipe 6 is less than the length of the communication cable 2 so that the communication cable 2 between the drill pipes is connected.
A bayonet 10 is provided on the inner wall of each drill rod end for locating the communication cable 2.
The bayonet 10 is a cylindrical structure of a central through hole of non-metallic, non-conductive material.
Threaded connections are arranged between adjacent metal drill rods 5, between adjacent metal drill rods 5 and non-metal non-conductive drill rods 6 and between adjacent non-metal non-conductive drill rods 6.
Example 2:
The embodiment provides a method for acquiring data in a cabled transient electromagnetic probe drill hole, which comprises the following steps:
a: after the metal drill rod is connected with the drill bit, the metal drill rod is put into a drill hole;
B: connecting the nonmetal nonconductive drill rod with the metal drill rod in the drill hole, and putting the nonmetal nonconductive drill rod into the drill hole;
c: determining the number of the non-metal non-conductive drill rods to be put into according to the length of the non-metal non-conductive drill rods so as to meet the total length of 20m of the non-metal non-conductive drill rods at the front end;
D: connecting a nonmetal nonconductive drill rod embedded with a transient electromagnetic probe with a nonmetal nonconductive drill rod in a drill hole, and putting the drill hole into the drill hole;
E: connecting a nonmetal nonconductive drill rod embedded with a communication cable with a nonmetal nonconductive drill rod in a drill hole, and ensuring that the communication cables in the two nonmetal nonconductive drill rods are connected through a waterproof plug and then are put into the drill hole;
F: according to the length of the nonmetallic nonconductive drill pipes, determining the number of nonmetallic nonconductive drill pipes which are continuously put into the embedded communication cable so as to meet the total length of the nonmetallic nonconductive drill pipes at the rear end by 20m;
G: connecting a metal drill rod embedded with a communication cable with a nonmetal non-conductive drill rod in a drill hole, and ensuring that the communication cables in the two sections of drill rods are connected through a waterproof plug and then are put into the drill hole;
H: repeating the step G until the transient electromagnetic probe reaches a designated measurement position;
i: connecting the orifice communication cable with the transient electromagnetic receiver, and controlling the transient electromagnetic probe to acquire data through the transient electromagnetic receiver;
J: g, disconnecting the orifice communication cable from the transient electromagnetic receiver, continuing to step G until the transient electromagnetic probe reaches another designated measuring position, and repeating the step I;
k: repeating the step J until the data acquisition of all the measurement positions is completed;
L: disconnecting the orifice communication cable and the transient electromagnetic receiver, taking out drill rods section by section, and disconnecting the cable between the drill rods until all the drill rods are taken out;
M: the transient electromagnetic probe can also be pushed to the furthest end of the drill hole and then data can be acquired in the process of exiting the drill rod.
Claims (3)
1. The method for acquiring data in the cable transient electromagnetic probe drill hole is characterized by being realized by a device for acquiring data in the cable transient electromagnetic probe drill hole, wherein the device for acquiring data in the cable transient electromagnetic probe drill hole comprises the following components which can be connected in sequence: the transient electromagnetic probe (1), a plurality of sections of communication cables (2) which can be connected in sequence and a transient electromagnetic receiver (3) arranged outside a drilling hole; the method further comprises the following steps of: the drill comprises a drill bit (4), a metal drill rod (5), a plurality of nonmetallic nonconductive drill rods (6) and a plurality of metal drill rods (5), wherein each drill rod is of a hollow structure;
The transient electromagnetic probe tube (1) is arranged in the nonmetal nonconductive drill rod (6), and the nonmetal nonconductive drill rod (6) with the same material is connected with the front and the rear of the nonmetal nonconductive drill rod (6) where the transient electromagnetic probe tube (1) is positioned; the communication cables (2) are respectively arranged in each drill rod and correspond to each drill rod one by one, and two sections of communication cables (3) of adjacent drill rods are connected through waterproof plugs (8);
A buffer layer (9) is filled between the outer wall of the transient electromagnetic probe tube (1) and the inner wall of the nonmetal non-conductive drill rod (6);
The length of the transient electromagnetic probe tube (1) is smaller than the length of the nonmetal non-conductive drill rod (6);
the length of the nonmetal non-conductive drill rod (6) is smaller than that of the communication cable (2);
A bayonet (10) is arranged on the inner wall of each drill rod end;
The bayonet (10) is of a cylindrical structure of a central through hole made of nonmetallic nonconductive materials;
The method comprises the following steps:
a: after the metal drill rod is connected with the drill bit, the metal drill rod is put into a drill hole;
B: connecting the nonmetal nonconductive drill rod with the metal drill rod in the drill hole, and putting the nonmetal nonconductive drill rod into the drill hole;
c: determining the number of the non-metal non-conductive drill rods to be put into according to the length of the non-metal non-conductive drill rods so as to meet the total length of 20m of the non-metal non-conductive drill rods at the front end;
D: connecting a nonmetal nonconductive drill rod embedded with a transient electromagnetic probe with a nonmetal nonconductive drill rod in a drill hole, and putting the drill hole into the drill hole;
E: connecting a nonmetal nonconductive drill rod embedded with a communication cable with a nonmetal nonconductive drill rod in a drill hole, and ensuring that the communication cables in the two nonmetal nonconductive drill rods are connected through a waterproof plug and then are put into the drill hole;
F: according to the length of the nonmetallic nonconductive drill pipes, determining the number of nonmetallic nonconductive drill pipes which are continuously put into the embedded communication cable so as to meet the total length of the nonmetallic nonconductive drill pipes at the rear end by 20m;
G: connecting a metal drill rod embedded with a communication cable with a nonmetal non-conductive drill rod in a drill hole, and ensuring that the communication cables in the two sections of drill rods are connected through a waterproof plug and then are put into the drill hole;
H: repeating the step G until the transient electromagnetic probe reaches a designated measurement position;
i: connecting the orifice communication cable with the transient electromagnetic receiver, and controlling the transient electromagnetic probe to acquire data through the transient electromagnetic receiver;
J: g, disconnecting the orifice communication cable from the transient electromagnetic receiver, continuing to step G until the transient electromagnetic probe reaches another designated measuring position, and repeating the step I;
k: repeating the step J until the data acquisition of all the measurement positions is completed;
L: disconnecting the communication cable of the orifice and the transient electromagnetic receiver, taking out the drill rods section by section, and disconnecting the cable between the drill rods until all the drill rods are taken out.
2. A method of acquiring data in a cabled transient electromagnetic probe borehole according to claim 1, characterized in that the non-metallic non-conductive drill rod (6) is of non-conductive, non-magnetic and high strength nylon material.
3. A method of acquiring data in a cabled transient electromagnetic probe borehole according to claim 1, characterized in that the threaded connections are between adjacent metal drill rods (5), between adjacent metal drill rods (5) and non-metal non-conductive drill rods (6) and between adjacent non-metal non-conductive drill rods (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011277909.3A CN112431586B (en) | 2020-11-16 | 2020-11-16 | Method and device for acquiring data in cable transient electromagnetic probe drilling |
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| CN202011277909.3A CN112431586B (en) | 2020-11-16 | 2020-11-16 | Method and device for acquiring data in cable transient electromagnetic probe drilling |
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| CN112431586B true CN112431586B (en) | 2024-04-16 |
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