CN211081704U - Drill rod positioning sleeve - Google Patents

Drill rod positioning sleeve Download PDF

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Publication number
CN211081704U
CN211081704U CN201921854006.XU CN201921854006U CN211081704U CN 211081704 U CN211081704 U CN 211081704U CN 201921854006 U CN201921854006 U CN 201921854006U CN 211081704 U CN211081704 U CN 211081704U
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CN
China
Prior art keywords
cylinder
positioning
fixed
drill rod
connecting plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201921854006.XU
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Chinese (zh)
Inventor
吴党中
林瑞润
翁小波
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Zhongshui Engineering Technology Co ltd
Original Assignee
Zhejiang Zhongshui Engineering Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by Zhejiang Zhongshui Engineering Technology Co ltd filed Critical Zhejiang Zhongshui Engineering Technology Co ltd
Priority to CN201921854006.XU priority Critical patent/CN211081704U/en
Application granted granted Critical
Publication of CN211081704U publication Critical patent/CN211081704U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model relates to a submarine drilling's technical field, in particular to drilling rod positioning sleeve, including the cylindrical location section of thick bamboo of rigidity and setting up the locating rack that is used for erectting the sleeve on the bank, the one end that the locating rack was kept away from to the sleeve sets up in the seabed, and outside the drilling rod was located to the location barrel casing. The utility model discloses the utensil can improve the accuracy of drilling rod at the seabed construction through setting up a location section of thick bamboo.

Description

Drill rod positioning sleeve
Technical Field
The utility model belongs to the technical field of submarine drilling's equipment and specifically relates to a drilling rod positioning sleeve is related to.
Background
When laying pipelines on the seabed, a directional drilling machine is needed to drill the seabed. In the drilling process, the drill rig is usually arranged on the shore, and the drill rod continuously extends to drill the seabed.
The patent application number is 201520031356.1, the chinese utility model patent of application date for 2015 year 1 month 16 days discloses an improvement formula level directional drilling machine, contains the body, slope on the body is equipped with rack slide rail and slider, the upper surface of rack slide rail is equipped with the rack, slider slidable sets up on the rack slide rail and is equipped with in the meshing formula the gear of rack, be equipped with power component, reducing pole and drilling rod on the slider, the one end of slider still is equipped with the support the drilling rod centralizer of drilling rod, the drilling rod centralizer contains the ring body, the inner wall of ring body is equipped with ball bearing, ball bearing's inner wall supplies the drilling rod is worn to be put. In the prior art, the drill rod can slide along with the sliding assembly and continuously drill forwards in the drilling process, so that the drilling operation is completed.
However, when the prior art is applied to the seawall drilling, the distance between the drilling machine and the seabed soil-entering point is long, so that the drilling rod is influenced by factors such as ocean currents, waves and the like in the process of continuously extending forwards, the drilling rod is easy to bend, and the drilling rod is difficult to align to a construction site which is actually needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a drilling rod position sleeve for the direction to the drilling rod is fixed a position.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme: the drill rod positioning sleeve comprises a rigid positioning barrel and a positioning frame for erecting the positioning barrel, wherein the positioning barrel is sleeved outside a drill rod.
When the drilling machine works, one end of the positioning cylinder is put in a preset place through an anchorage device in advance, and the other end of the positioning cylinder is fixedly erected on the positioning frame, so that the position of the positioning cylinder is fixed. At the moment, the drill rod passes through the positioning cylinder and performs drilling operation on the seabed, so that deviation is not easy to occur, and the construction accuracy is improved.
The utility model discloses further set up to: the locating rack comprises a mounting barrel sleeved outside the locating barrel and a limiting rack used for placing the locating barrel.
Through adopting above-mentioned technical scheme, erect a section of thick bamboo through columniform and fix a location section of thick bamboo, can increase the area of contact between locating rack and the location section of thick bamboo, make a location section of thick bamboo erect more steadily in the locating rack, and then improve the accuracy of construction.
The utility model discloses a further set up to: the limiting frame comprises a bottom plate, a driving hydraulic cylinder is fixedly arranged on the bottom plate along the vertical direction, a sliding groove is formed in the lower portion of the erection barrel along the axial direction of the erection barrel, a sliding block is connected to the sliding groove in a sliding mode, a cylinder body of the driving hydraulic cylinder is fixed on the bottom plate, and a hydraulic rod of the driving hydraulic cylinder is rotatably connected with the sliding block.
Through adopting above-mentioned technical scheme, under the promotion of drive hydraulic cylinder hydraulic stem, erect a section of thick bamboo and can take place to rotate in vertical plane to adjust the height and the direction of a location section of thick bamboo, and then make things convenient for a location section of thick bamboo to cooperate and adjust the direction and the position of drilling in the actual production process with the drilling rod.
The utility model discloses a further set up to: the limiting frame further comprises two upright columns symmetrically arranged on two sides of one end of the erection cylinder, and two sides of the erection cylinder are respectively abutted to one face of the two upright columns in opposite directions.
Through adopting above-mentioned technical scheme, when setting up a section of thick bamboo and rotate, the stand can carry on spacingly to setting up a section of thick bamboo, makes it can only take place to rotate in vertical plane, reduces to set up a section of thick bamboo and takes place the possibility that heels, further improves spacing and the stability of setting up a section of thick bamboo.
The utility model discloses a further set up to: still follow the fixed support pneumatic cylinder that is provided with of vertical direction on the bottom plate, the tie point of support pneumatic cylinder and bottom plate and the line of the tie point of drive pneumatic cylinder and bottom plate are on a parallel with the axial lead of erectting a section of thick bamboo, the cylinder body and the bottom plate fixed connection of support pneumatic cylinder, fixedly connected with backup pad on the hydraulic stem of support pneumatic cylinder, the upper surface of backup pad is the cambered surface just the cross-section internal diameter of backup pad equals erects the section external diameter of a section of thick bamboo.
Through adopting above-mentioned technical scheme, after drilling work is accomplished, the hydraulic stem of supporting the pneumatic cylinder can be released and make the backup pad butt in the surface of erectting a section of thick bamboo to support erectting a section of thick bamboo, make and erect a difficult emergence damage of the junction of section of thick bamboo and stand.
The utility model discloses a further set up to: the erection cylinder comprises a fixed half cylinder and a turning half cylinder hinged to one side of the fixed half cylinder, and a locking structure for locking the turning half cylinder and the fixed half cylinder and a fastener for locking the relative sliding between the positioning cylinder and the erection cylinder are further arranged between the turning half cylinder and the fixed half cylinder.
Through adopting above-mentioned technical scheme, can open the half section of thick bamboo of upset earlier, hang the location section of thick bamboo through the hoist and establish and place on fixed half section of thick bamboo, rotate the half section of thick bamboo of upset again and make it cover on the location section of thick bamboo and through locking structure locking, it is comparatively convenient to operate.
The utility model discloses a further set up to: a first fixed connecting plate and a second fixed connecting plate respectively extend along the radial direction from two sides of the fixed half cylinder, a first overturning connecting plate and a second overturning connecting plate respectively extend along the radial direction from two sides of the overturning half cylinder, a rotating shaft is rotatably connected to the first fixed connecting plate, and the rotating shaft is fixedly connected to the first overturning connecting plate; the locking structure is a locking bolt which is in threaded connection with the second fixed connecting plate and the second overturning connecting plate; when the half cylinder cover of upset closes half fixed cylinder, first fixed connection board and first upset connecting plate butt, second fixed connection board and second upset connecting plate butt.
Through adopting above-mentioned technical scheme, utilize first fixed connection board and the mutual butt of first upset connecting plate, the mutual butt of second fixed connection board and second upset connecting plate can increase the area of contact between the fixed half section of thick bamboo and the upset half section of thick bamboo. The second fixed connecting plate and the second overturning connecting plate are locked through bolts, the positioning barrel can be guaranteed to abut against the inner surface of the erection barrel, the stability of a system is improved, and the construction precision is improved.
The utility model discloses a further set up to: still fixedly connected with servo band-type brake motor on the first fixed connection board, servo band-type brake motor's output shaft fixed connection is in the axis of rotation.
Through adopting above-mentioned technical scheme, can rotate with half a section of thick bamboo of servo band-type brake motor drive upset to thereby utilize the band-type brake characteristic of servo band-type brake motor to prevent half a section of thick bamboo of upset from losing the restriction when opening and taking place free rotation's phenomenon, make whole operation convenient more and safety.
The utility model discloses a further set up to: the fasteners are a plurality of fastening bolts which are in threaded connection with the fixed half cylinder and the overturning half cylinder, and the fastening bolts abut against the outer wall of the positioning cylinder.
Through adopting above-mentioned technical scheme, support tightly to a location section of thick bamboo through fastening bolt, can increase fastening bolt to the frictional force of a location section of thick bamboo, and then reduce a location section of thick bamboo and take place the slip or the pivoted possibility in erectting a section of thick bamboo, further improve the construction precision of drilling operation.
The utility model discloses a further set up to: the one end that the rig was kept away from to the location section of thick bamboo is provided with the setting element, the setting element includes two fixed connection in the inserted bar of location section of thick bamboo outer surface and along the connecting rod of horizontal direction fixed connection between two inserted bars.
The insertion rod is inserted into soil on the seabed, so that the positioning cylinder can be fixedly supported at one end of the seabed, the position of the positioning cylinder is more stable, and the construction accuracy is improved.
To sum up, the utility model discloses a beneficial technological effect does:
1. the utility model discloses in, through setting up a location section of thick bamboo and the locating rack that is used for placing a location section of thick bamboo, can realize the accurate positioning of drilling rod in the work progress, improve the accuracy of construction.
2. The utility model discloses in, erect a section of thick bamboo and utilize actuating cylinder control to erect a section of thick bamboo through the setting and take place to rotate, the convenience is finely tuned operating condition, is favorable to improving the accuracy of construction.
3. The utility model discloses in, support setting up a section of thick bamboo through setting up the stand, can reduce the power that the rig bore in drilling process, help improving the stability of a location section of thick bamboo, setting up a section of thick bamboo and spacing.
4. The utility model discloses in, support the pneumatic cylinder through setting up, can support setting up a section of thick bamboo after setting up a section of thick bamboo and rig separation, reduce the stress of setting up between the junction between a section of thick bamboo and the stand, and then increase and set up the life of a section of thick bamboo and stand.
5. The utility model discloses in, through setting up half a fixed section of thick bamboo of upset connection and half a section of thick bamboo of upset, can conveniently be fixed in with a location section of thick bamboo and erect a section of thick bamboo.
6. The utility model discloses in, through setting up the setting element and making the inserted bar insert the seabed, can increase the stability of a location section of thick bamboo, improve the accuracy of construction.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a positioning frame in an embodiment of the present invention.
Fig. 3 is a schematic view of a connection structure between the mounting cylinder and the driving hydraulic cylinder in the embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a positioning element and an insertion rod according to an embodiment of the present invention.
In the figure, 1, a drilling machine; 11. a drill stem; 2. a positioning frame; 21. a limiting frame; 211. a column; 212. a base plate; 22. erecting a cylinder; 221. turning over the half cylinder; 2211. a first turnover connecting plate; 2212. a second turnover connecting plate; 222. fixing the half cylinder; 2221. a first fixed connection plate; 2222. a second fixed connection plate; 2223. a chute; 2224. a slider; 223. a servo band-type brake motor; 224. a locking bolt; 225. fastening a bolt; 226. a rotating shaft; 3. a positioning cylinder; 31. a lock; 32. a positioning member; 321. an insertion rod; 322. a connecting rod; 4. an anchorage device; 51. a support hydraulic cylinder; 511. a support plate; 52. the hydraulic cylinder is driven.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example (b): a drill rod positioning sleeve, referring to fig. 1, comprises a positioning frame 2 and a positioning cylinder 3, wherein one end of the positioning cylinder 3 is arranged on the positioning frame 2.
During construction, the drilling machine 1 is placed on the land such as a coast, an island and the like, the positioning cylinder 3 is sleeved on the drilling machine 1, and the drill rod 11 coaxially penetrates through the positioning cylinder 3 and extends out of one end, far away from the drilling machine 1, of the positioning cylinder 3 for remote point charging operation.
Referring to fig. 2 and 3, the positioning frame 2 includes a limiting frame 21 vertically disposed on the ground and a erecting cylinder 22 disposed on the limiting frame 21 for erecting the positioning cylinder 3, and the limiting frame 21 includes a bottom plate 212 and two upright posts 211 vertically disposed on the bottom plate 212. Erection cylinder 22 includes a semi-cylindrical fixed half-cylinder 222 and a semi-cylindrical inverted half-cylinder 221. One end of the fixed half cylinder 222 close to the drilling machine 1 is respectively abutted against one surface of the two upright posts 211 so as to limit the offset of the fixed half cylinder 222 in the horizontal direction. A sliding groove 2223 is axially formed in the lower surface of the fixed half cylinder 222, a sliding block 2224 is slidably connected to the sliding groove 2223, a driving hydraulic cylinder 52 is vertically arranged on the bottom plate 213, and a hydraulic rod of the driving hydraulic cylinder 52 is rotatably connected to the lower surface of the sliding block 2224. A support hydraulic cylinder 51 is also fixedly arranged on the bottom plate 213 along the vertical direction, the support hydraulic cylinder 51 is arranged between the drilling machine 1 and the driving hydraulic cylinder 52, and the axial leads of the support hydraulic cylinder 51, the driving hydraulic cylinder 52 and the erection cylinder 22 are basically in the same plane. A support plate 511 is fixedly connected to a hydraulic rod of the support hydraulic cylinder 51, the upper surface of the support plate 511 is an arc surface extending upward from the center to both sides, and the inner diameter of the cross section of the support plate 511 is not less than the outer diameter of the cross section of the erection cylinder 22.
The rotation angle of the erection cylinder 222 is controlled by driving the hydraulic cylinder 52 to ascend and descend, so that the point-to-point operation of the drill rod 11 is accurately controlled. Specifically, after the drilling machine 1 is parked on land, the lifting of the hydraulic rod driving the hydraulic cylinder 52 can control the drill rod 11 to swing upwards with the drilling machine 1 as a central point, and conversely, the downward adjustment of the drill rod 11 can be controlled by the descending of the hydraulic rod driving the hydraulic cylinder 52.
Referring to fig. 2, the fixed half cylinder 222 has first and second fixed connection plates 2221 and 2222 integrally extended in a radial direction at both sides thereof, and the turning half cylinder 221 has first and second turning connection plates 2211 and 2212 integrally extended in a radial direction at both sides thereof. The first fixing connection plate 2221 is rotatably connected with a rotation shaft 226, and the rotation shaft 226 is parallel to the axial line of the fixing half cylinder 222 and is fixedly connected with the turning half cylinder 221. A servo band-type brake motor 223 for driving the rotation shaft 226 to rotate is also fixedly connected to the first fixed connection plate 2221. The second fixing connecting plate 2222 and the second overturning connecting plate 2212 are provided with threaded holes (not shown in the figure) facing each other, and the threaded holes are penetrated and connected with locking bolts 224 through threads. When the turning half cylinder 221 is covered on the fixed half cylinder 222, the outer wall of the positioning cylinder 3 abuts against the inner wall of the erection cylinder 22, the first fixing connection plate 2221 abuts against the first turning connection plate 2211, and the second fixing connection plate 2222 abuts against the second turning connection plate 2212. A plurality of fastening bolts 225 are further inserted into the fixed half cylinder 222 and the turning half cylinder 221, and the fastening bolts 225 abut against the outer surface of the positioning cylinder 3.
The servo brake motor 223 drives the rotating shaft 226 to rotate, so that the turnover half cylinder 221 is driven to turn over, and the turnover half cylinder 221 can be opened and closed. When the turning half cylinder 221 is closed, the positioning cylinder 3 can be fixed in the erection cylinder 22 by the abutting action between the erection cylinder 22 and the positioning cylinder 3 and the abutting action of the fastening bolt 225 on the positioning cylinder 3.
Referring to fig. 1 and 4, a positioning member 32 is further disposed at an end of the positioning cylinder 3 away from the erecting cylinder 22, and the positioning member 32 includes two insertion rods 321 fixedly connected to a lower surface of the positioning cylinder 3 and a connecting rod 322 fixedly connected between the two insertion rods 321. The one end of setting a section of thick bamboo 22 is kept away from at a location section of thick bamboo 3 still is equipped with the latch fitting 31 that is used for fixed anchorage device 4, and latch fitting 31 is the metal semicircle ring that sets up along the axial of a location section of thick bamboo 3, and the one end of latch fitting 31 articulates in a location section of thick bamboo 3, and the other end passes through bolt and a location section of thick bamboo 3 fixed connection. The anchorage device 4 is hung on the locking piece 31 and the locking piece 31 is locked by the bolt, so that the anchorage device 4 can be fixed at one end of the positioning cylinder 3 far away from the erection cylinder 22, and when the positioning cylinder 3 reaches the seabed, a worker can dive into the water and unlock the locking piece 31, so that the anchorage device 4 can be taken down.
The implementation principle and the using method of the embodiment are as follows:
fixing an anchorage 4 on the locking member 31, sinking one end of the positioning cylinder 3 to a predetermined construction place on the seabed by ship transportation, and inserting the positioning member 32 into soil on the seabed to relatively fix the position of the positioning cylinder 3; locking member 31 may be opened underwater by a diver and anchorage 4 retracted. The servo band-type brake motor 223 is firstly opened to enable the turnover half cylinder 221 to be turned over and opened in a construction site on the shore, the erection cylinder 22 can be made to rotate in a vertical plane by controlling the driving hydraulic cylinder 52, the positioning cylinder 3 is placed in the fixed half cylinder 222 through the crane, the turnover half cylinder 221 is turned over and closed through the reverse rotation of the servo band-type brake motor 223, the fixed half cylinder 222 and the turnover half cylinder 221 are locked through the locking bolt 224, the positioning cylinder 3 is fastened and abutted to the erection cylinder 22 through the fastening bolt 225, at the moment, the drill rod 11 of the drilling machine 1 can penetrate through the positioning cylinder 3, and drilling operation is conducted in a preset construction site. Through the steps, the drill rod 11 is not easily influenced by external factors such as ocean currents, surges and the like in the positioning cylinder 3, is not easily bent or deflected, and can effectively improve the construction accuracy.
After the drilling operation is completed, the hydraulic rod of the support hydraulic cylinder 51 pushes up the support plate 511 to abut against the lower surface side wall of the erection cylinder 22, and the drilling machine 1 and the erection cylinder are separated from each other.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (10)

1. A drill rod positioning sleeve is characterized in that: the drill rod positioning device comprises a rigid positioning barrel (3) and a positioning frame (2) for erecting the positioning barrel (3), wherein the positioning barrel (3) is sleeved outside a drill rod (11).
2. The drill rod positioning sleeve as recited in claim 1, wherein: the positioning frame (2) comprises an erection barrel (22) sleeved outside the positioning barrel (3) and a limiting frame (21) used for placing the positioning barrel (3).
3. A drill rod positioning sleeve as claimed in claim 2, wherein: the limiting frame (21) comprises a bottom plate (212), a driving hydraulic cylinder (52) is fixedly arranged on the bottom plate (212) along the vertical direction, a sliding groove (2223) is formed in the axial direction of the erection barrel (22) below the erection barrel (22), a sliding block (2224) is connected in the sliding groove (2223) in a sliding mode, a cylinder body of the driving hydraulic cylinder (52) is fixed on the bottom plate (212), and a hydraulic rod of the driving hydraulic cylinder (52) is rotatably connected with the sliding block (2224).
4. A drill rod positioning sleeve as claimed in claim 3, wherein: the limiting frame (21) further comprises two upright columns (211) symmetrically arranged on two sides of one end of the erection cylinder (22), and two sides of the erection cylinder (22) are respectively abutted to the opposite surfaces of the two upright columns (211).
5. A drill rod positioning sleeve as claimed in claim 3, wherein: still follow the fixed support pneumatic cylinder (51) that is provided with of vertical direction on bottom plate (212), the line projection of the tie point of support pneumatic cylinder (51) and bottom plate (212) and the tie point of drive pneumatic cylinder (52) and bottom plate (212) and the axial lead coplane of erectting a section of thick bamboo (22), the cylinder body and the bottom plate (212) fixed connection of support pneumatic cylinder (51), fixedly connected with backup pad (511) on the hydraulic stem of support pneumatic cylinder (51), the upper surface of backup pad (511) is the cambered surface just the cross-section internal diameter of backup pad (511) is not less than the cross-section external diameter of erectting a section of thick bamboo (22).
6. A drill rod positioning sleeve as claimed in claim 2, wherein: the erection cylinder (22) comprises a fixed half cylinder (222) and a turning half cylinder (221) hinged to one side of the fixed half cylinder (222), and a locking structure for locking the turning half cylinder (221) and the fixed half cylinder (222) and a fastener for locking the relative sliding between the positioning cylinder (3) and the erection cylinder (22) are further arranged between the turning half cylinder (221) and the fixed half cylinder (222).
7. The drill rod positioning sleeve as recited in claim 6, wherein: a first fixed connecting plate (2221) and a second fixed connecting plate (2222) respectively extend from two sides of the fixed half cylinder (222) along the radial direction, a first overturning connecting plate (2211) and a second overturning connecting plate (2212) respectively extend from two sides of the overturning half cylinder (221) along the radial direction, a rotating shaft (226) is rotatably connected to the first fixed connecting plate (2221), and the rotating shaft (226) is fixedly connected to the first overturning connecting plate (2211); the locking structure is a locking bolt (224) which is in threaded connection with the second fixing connecting plate (2222) and the second overturning connecting plate (2212); when the fixed half cylinder (222) is covered by the overturning half cylinder (221), the first fixed connecting plate (2221) is abutted with the first overturning connecting plate (2211), and the second fixed connecting plate (2222) is abutted with the second overturning connecting plate (2212).
8. The drill rod positioning sleeve as recited in claim 7, wherein: still fixedly connected with servo band-type brake motor (223) on first fixed connection board (2221), the output shaft fixed connection of servo band-type brake motor (223) is in axis of rotation (226).
9. The drill rod positioning sleeve as recited in claim 6, wherein: the fasteners are fastening bolts (225) which are in threaded connection with the fixed half cylinder (222) or the overturning half cylinder (221), and the fastening bolts (225) are abutted against the outer wall of the positioning cylinder (3).
10. The drill rod positioning sleeve as recited in claim 1, wherein: one end of the positioning barrel (3) far away from the erection barrel (22) is provided with a positioning piece (32), and the positioning piece (32) comprises two insertion rods (321) fixedly connected to the outer surface of the positioning barrel (3) and a connecting rod (322) fixedly connected between the two insertion rods (321) along the horizontal direction.
CN201921854006.XU 2019-10-30 2019-10-30 Drill rod positioning sleeve Expired - Fee Related CN211081704U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921854006.XU CN211081704U (en) 2019-10-30 2019-10-30 Drill rod positioning sleeve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921854006.XU CN211081704U (en) 2019-10-30 2019-10-30 Drill rod positioning sleeve

Publications (1)

Publication Number Publication Date
CN211081704U true CN211081704U (en) 2020-07-24

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ID=71628929

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921854006.XU Expired - Fee Related CN211081704U (en) 2019-10-30 2019-10-30 Drill rod positioning sleeve

Country Status (1)

Country Link
CN (1) CN211081704U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112709222A (en) * 2020-12-03 2021-04-27 北京东地岩土工程有限公司 Triaxial mixing pile structure in water-rich thick sand hard stratum and construction process thereof
CN113338828A (en) * 2021-08-05 2021-09-03 山东辛丁技术有限公司 Dig bored concrete pile drilling positioner soon

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112709222A (en) * 2020-12-03 2021-04-27 北京东地岩土工程有限公司 Triaxial mixing pile structure in water-rich thick sand hard stratum and construction process thereof
CN113338828A (en) * 2021-08-05 2021-09-03 山东辛丁技术有限公司 Dig bored concrete pile drilling positioner soon

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Granted publication date: 20200724

Termination date: 20211030