CN212614674U - Shearing type horizontal directional drilling geological prospecting in-hole logging instrument protection device - Google Patents
Shearing type horizontal directional drilling geological prospecting in-hole logging instrument protection device Download PDFInfo
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- CN212614674U CN212614674U CN202022007787.8U CN202022007787U CN212614674U CN 212614674 U CN212614674 U CN 212614674U CN 202022007787 U CN202022007787 U CN 202022007787U CN 212614674 U CN212614674 U CN 212614674U
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Abstract
The utility model discloses a protective device for a logging instrument in a shearing type horizontal directional drilling geological exploration hole, which comprises an outer pipe combination, a lower protective pipe and a drill bit, wherein the upper protective pipe, the lower protective pipe is connected with the upper protective pipe, and the drill bit is connected with the lower protective pipe; the inner tube testing arrangement combination is located the inside of outer tube combination, including the guiding axle, through the guiding axle connect with the short joint of guiding axle connection and connect the testing arrangement at the short joint lower extreme, the circumference that the guiding axle connects be equipped with outward with go up the upper and lower protection tube adapter that upper protective tube and lower protection tube are connected. The utility model discloses both guaranteed to synthesize the logging device and sent into the bottom of the hole in-process by the directional engineering geology reconnaissance hole that creeps into of level, not worn and torn by the pore wall, but also can spray out the rock debris that the mud is piled up at the bottom of the hole before breaking open the drill bit, can protect to synthesize the smooth propelling movement toward the inside of logging device. The utility model discloses a protection and the propelling movement of the downthehole logging instrument of engineering geology reconnaissance are crept into to the level orientation very much to the device has wide application prospect.
Description
Technical Field
The utility model relates to a geotechnical engineering reconnaissance probing machines's technical field especially relates to a shearing type level directional drilling geological survey downthehole logging instrument protection device.
Background
For some tunnel projects with large deep burial distance, the traditional vertical hole geological drilling needs to penetrate through an upper covering layer to reach the stratum where the axis of the tunnel is located, but the geological characteristics of the tunnel axis surrounding rock cannot be truly and comprehensively reflected. If the horizontal directional drilling technology can be applied to geological exploration of ultra-long-distance large-buried-depth underground engineering, an ultra-long-distance horizontal exploration hole is drilled at the entrance end and the exit end of a tunnel, and the geological condition along the underground line can be truly reflected by combining testing means such as comprehensive well logging and the like.
At present, domestic comprehensive well logging is mostly used in a vertical well, the application of a horizontal exploration hole is still blank, tunnel axial trace surrounding rock is explored by combining a horizontal directional drill at present, but because the well logging instrument is sent into the bottom of the hole by a horizontal directional drill rod, the well logging instrument can generate large friction and extrusion force with the side wall of the horizontal directional drilling engineering geological exploration hole, light people can wear the instrument to a certain extent, heavy people can damage the instrument, the well logging instrument cannot be normally used, unnecessary trouble can be brought to the comprehensive well logging of the horizontal exploration hole, and the engineering progress is seriously influenced.
SUMMERY OF THE UTILITY MODEL
Based on the not enough of prior art existence, the utility model aims to solve the technical problem that a shearing type horizontal directional drilling geological exploration downthehole logging instrument protection device is provided, simple structure, reasonable in design, the logging instrument is synthesized in the protection is sent into the hole bottom in-process by horizontal directional drilling rod and is not worn and torn by the pore wall, and the protection is synthesized the logging instrument and is pushed smoothly toward the inside, makes the test go on smoothly.
In order to achieve the purpose, the utility model adopts the following technical measures:
a protective device for a logging instrument in a geological exploration hole by shear type horizontal directional drilling comprises an outer pipe combination, a protective pipe and a drill bit, wherein the outer pipe combination comprises an upper protective pipe, a lower protective pipe connected with the upper protective pipe and the drill bit connected with the lower protective pipe; the inner pipe testing device combination is positioned inside the outer pipe combination and comprises a guide shaft, a short joint connected with the guide shaft through a guide shaft joint and a testing device connected to the lower end of the short joint, and an upper protection pipe adapter and a lower protection pipe adapter connected with the upper protection pipe and the lower protection pipe are arranged outside the circumference of the guide shaft joint; the upper protection tube adapter and the lower protection tube adapter are provided with inner holes for the guide shaft, the guide shaft adapter and the short adapter to pass through; a shearing pin which can be clamped in the upper and lower protection tube adapters is fixed on the guide shaft adapter; the testing device comprises a logging instrument connected with the short joint and a logging instrument protecting head connected to the lower end of the logging instrument; when a drill rod of the horizontal directional drill pushes the outer pipe assembly to move towards the bottom of the hole, slurry flows into the guide shaft through the inner part of the upper protection pipe, flows out of a slurry outlet on the short joint through the short joint, flows into an inner cavity of the lower protection pipe and flows out of the horizontal exploration hole through the drill bit; when the drill rod pushing outer pipe combination of the horizontal directional drill is sent to the bottom of the hole, the drill rod is pumped back to a length larger than that of the testing device, the mud pressure is increased to a pressure value required by shearing of the shearing pin, and after the shearing pin is sheared, the testing device is pushed out of the lower protection pipe by the mud to start detection in the hole under the action of the mud pressure.
Preferably, a threaded hole is formed at a middle portion of the guide shaft coupling, and the shear pin is directly fixed in the guide shaft coupling through the threaded hole.
Further, the inside of upper and lower protection tube adapter is equipped with the right angle step, is used for blocking the shearing pin.
Optionally, the short joint surface is equipped with and is used for preventing that the whole stopper that contracts and move back towards outer nest of tubes combination of inner tube testing arrangement combination, just the short joint is last to be equipped with the mud export in the lower extreme of stopper.
Further, the outer diameter of the guide shaft is the same as the outer diameters of the guide shaft joint and the short joint, and the length of the guide shaft is larger than the total length of the logging instrument and the instrument protection head.
Optionally, the top end of the guide shaft is connected with a top cap, and the top cap is provided with a flow guide groove opening for allowing slurry to flow into the guide shaft; when the inner pipe testing device combination is pushed out of the outer pipe combination by mud, the top cap is clamped on the right-angled steps in the upper protection pipe adapter and the lower protection pipe adapter, and the inner pipe testing device combination is guaranteed not to be pushed out integrally.
Further, the logging cable penetrates out of the guide shaft and the inner part of the short joint and is connected with the logging instrument.
By last, the utility model discloses a shearing type horizontal directional drilling geological survey downthehole logging instrument protection device simple structure mainly utilizes the logging instrument to examine time measuring to horizontal directional drilling engineering geological survey hole, and protection logging instrument is propelling movement toward the inside, can effectively avoid the logging instrument to be rubbed by the pore wall to reduce the risk that the instrument damaged, make horizontal directional drilling engineering geological survey hole synthesize the logging and go on smoothly. The utility model discloses both guaranteed to synthesize the logging device and sent into the bottom of the hole in-process by the directional engineering geology reconnaissance hole that creeps into of level, not worn and torn by the pore wall, but also can spray out the rock debris that the mud is piled up at the bottom of the hole before breaking open the drill bit, can protect to synthesize the smooth propelling movement toward the inside of logging device. The utility model discloses a protection and the propelling movement of the downthehole logging instrument of engineering geology reconnaissance are crept into to the level orientation very much to the device has wide application prospect.
Drawings
Fig. 1 is the structural schematic diagram of the protective device for the logging instrument in the shearing type horizontal directional drilling geological exploration hole of the preferred embodiment of the invention.
Fig. 2 is a schematic structural diagram of the inner tube testing device assembly of the present invention.
Fig. 3 is the utility model discloses a structure schematic diagram of shearing pin card on the inside step of upper and lower protection tube adapter.
Wherein: 1-logging cable, 2-upper protective pipe joint, 3-upper protective pipe, 4-top cap, 5-guiding shaft, 6-upper and lower protective pipe adaptor, 7-guiding shaft joint, 8-shearing pin, 9-short joint, 10-baffle, 11-mud outlet, 12-logging cable joint, 13-lower protective pipe, 14-logging instrument, 15-logging instrument protective head, 16-drill bit.
Detailed Description
The following describes in detail a shear type horizontal directional drilling geological exploration downhole logging instrument protection device according to the present invention with reference to fig. 1 to 3.
Referring to fig. 1 and 2, the utility model discloses a shearing pin formula level directional drilling engineering geology reconnaissance downthehole logging instrument protection device includes outer tube combination and inner tube testing arrangement combination, and wherein, the outer tube combination includes upper protection tube 3, upper and lower protection tube adapter 6, lower protection tube 13 and drill bit 16. The upper protection pipe 3 is connected with the lower protection pipe 13 through an upper protection pipe adapter 6, and the drill bit 16 is installed at the lower end of the lower protection pipe 13.
The utility model discloses an inner tube testing arrangement combination includes hood 4, guiding axle 5, guiding axle joint 7, shearing pin 8, short joint 9, short joint surface stop 10, mud outlet 11, logging instrument 14, logging instrument protection head 15, and wherein, logging instrument 14 and logging instrument protection head 15 constitute testing arrangement. The top cap 4 in the inner pipe testing device combination is arranged at the top end of the guide shaft 5, and the top cap 4 is arranged in a hollow mode and is provided with a flow guide notch which can enable slurry to flow into the guide shaft 5. The lower end of the guide shaft 5 is connected with a short joint 9 through a guide shaft joint 7, the lower surface of the short joint 9 is provided with a stopper 10 and a slurry outlet 11, the stopper 10 can prevent the whole inner pipe testing device combination from retracting into an outer protection pipe (outer pipe combination), the lower end of the short joint 9 is connected with a logging instrument 14, and the front end of the logging instrument 14 is provided with a protection head 15. The logging cable 1 passes out of the short sub 9 and the inside of the guide shaft 5 and is connected to the logging tool 14 via the logging cable sub 12.
In addition, the internal diameter of the hole of upper and lower protection tube adapter 6 is supporting with guiding shaft 5, makes guiding shaft 5 just slide in the hole of upper and lower protection tube adapter 6, and the inside of upper and lower protection tube adapter 6 is equipped with the right angle step, can block hood 4 and shearing pin 8, and when the inner tube testing arrangement combination was pushed out the outer tube combination by mud, hood 4 card was in on the inside right angle step of upper and lower protection tube adapter 6, the assurance inner tube testing arrangement combination was not wholly released. The outer diameter of the guide shaft 5 is the same as the outer diameter of the guide shaft joint 7 and the short joint 9, and the length of the guide shaft 5 is slightly larger than the total length of the logging instrument 14 and the instrument protection head 15.
Referring to fig. 3, the lower end of the guide shaft 5 is connected with a guide shaft joint 7, the upper and lower protection pipe joints 6 are sleeved outside the circumference of the guide shaft joint 7, a threaded hole is formed in the middle of the guide shaft joint 7, a shear pin 8 with different shearing forces can be fixed in the threaded hole, and the shear pin 8 is fixed in the guide shaft joint 7 through the threaded hole, protrudes out of a part of the threaded hole, and is clamped on an inner step of the upper and lower protection pipe joints 6. The shearing pin 8 has different shearing force required for shearing according to different diameters, when the mud pressure is increased to a designed value, the shearing pin 8 is sheared, and the inner pipe testing device is integrally pushed forwards.
Below, referring to fig. 1 to 3 and combining the above structure description, the usage principle of the protective device for the logging instrument in the shearing type horizontal directional drilling geological exploration hole of the present invention is briefly described:
when utilizing horizontal directional drilling to combine to synthesize logging to examine time measuring, will horizontal reconnaissance hole the utility model discloses the device links to each other with the drilling rod of horizontal directional drilling, and it will to utilize the rig the utility model discloses a hole bottom is slowly sent into to the device, at the in-process of sending into, in mud flows into upper protection tube 3 through the drilling rod, from the inside guiding axle 5 that flows in of upper protection tube 3, flows out from mud export 11 through short-circuit connection 9 again, flows into down in the inner chamber of protection tube 13, flows out to horizontal reconnaissance downthehole through drill bit 16.
In the drilling rod propelling movement in-process inside that utilizes horizontal directional drilling, the utility model discloses a mud pressure that the inner tube testing arrangement combination (fig. 2) received is born by shear pin 8, so at the in-process of propelling movement, mud pressure should be controlled at certain numerical value in the drilling rod. When the utility model discloses a when the device sent into the hole bottom, be a little greater than testing arrangement's length with the drilling rod toward pumpback, increase mud pressure to shearing pin 8 and cut required pressure value, treat shearing pin 8 and cut off the back, under the effect of mud pressure, testing arrangement is released lower protection tube 13 by mud, the rear end of guiding axle is blocked on the inside step of upper and lower protection tube adapter 6 by hood 4, guarantee that inner tube testing arrangement combination (figure 2) is not wholly released, open and synthesize the downthehole detection of logging instrument 14 beginning, take out slowly the drilling rod, detect the completion until drill way department.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can understand that the changes or substitutions obtained within the technical scope of the present invention should be covered within the scope of the present invention.
Claims (7)
1. The utility model provides a shearing type horizontal directional drilling geological prospecting downthehole logging instrument protection device which characterized in that includes:
the outer pipe assembly comprises an upper protection pipe, a lower protection pipe connected with the upper protection pipe and a drill bit connected with the lower protection pipe;
the inner pipe testing device combination is positioned inside the outer pipe combination and comprises a guide shaft, a short joint connected with the guide shaft through a guide shaft joint and a testing device connected to the lower end of the short joint, and an upper protection pipe adapter and a lower protection pipe adapter connected with the upper protection pipe and the lower protection pipe are arranged outside the circumference of the guide shaft joint; the upper protection tube adapter and the lower protection tube adapter are provided with inner holes for the guide shaft, the guide shaft adapter and the short adapter to pass through; a shearing pin which can be clamped in the upper and lower protection tube adapters is fixed on the guide shaft adapter;
the testing device comprises a logging instrument connected with the short joint and a logging instrument protecting head connected to the lower end of the logging instrument.
2. The apparatus as claimed in claim 1, wherein the guide shaft joint has a threaded hole formed at a middle portion thereof, through which the shear pin is directly fixed in the guide shaft joint.
3. The apparatus as claimed in claim 1, wherein the upper and lower protective pipe adapters are provided with right angle steps inside for locking the shear pins.
4. The apparatus as claimed in claim 1, wherein the short joint has a stopper on its surface for preventing the inner tube testing apparatus assembly from moving back into the outer tube assembly, and a slurry outlet at the lower end of the stopper.
5. A shear type horizontal directional drilling tool protector in a borehole for geological exploration, according to claim 1, wherein said guide shaft has an outer diameter equal to the outer diameter of said guide shaft joint and said short joint, and wherein the length of said guide shaft is greater than the total length of said tool and said tool protector.
6. The apparatus as claimed in claim 3, wherein the top cap is connected to the top end of the guiding shaft, and the top cap has a flow guiding slot for guiding slurry into the guiding shaft;
when the inner pipe testing device combination is pushed out of the outer pipe combination by mud, the top cap is clamped on the right-angled steps in the upper protection pipe adapter and the lower protection pipe adapter, and the inner pipe testing device combination is guaranteed not to be pushed out integrally.
7. A shear type horizontal directional drilling tool protector in a borehole of geological exploration, according to claim 1, wherein said logging cable is threaded through said guide shaft and inside said short joint and connected to said logging tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022007787.8U CN212614674U (en) | 2020-09-15 | 2020-09-15 | Shearing type horizontal directional drilling geological prospecting in-hole logging instrument protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022007787.8U CN212614674U (en) | 2020-09-15 | 2020-09-15 | Shearing type horizontal directional drilling geological prospecting in-hole logging instrument protection device |
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| Publication Number | Publication Date |
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| CN212614674U true CN212614674U (en) | 2021-02-26 |
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| CN202022007787.8U Active CN212614674U (en) | 2020-09-15 | 2020-09-15 | Shearing type horizontal directional drilling geological prospecting in-hole logging instrument protection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111980678A (en) * | 2020-09-15 | 2020-11-24 | 武汉中交岩土工程有限责任公司 | Shearing type horizontal directional drilling geological prospecting in-hole logging instrument protection device |
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2020
- 2020-09-15 CN CN202022007787.8U patent/CN212614674U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111980678A (en) * | 2020-09-15 | 2020-11-24 | 武汉中交岩土工程有限责任公司 | Shearing type horizontal directional drilling geological prospecting in-hole logging instrument protection device |
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