CN208236351U - A kind of drilling rod built-in oil pipe combination - Google Patents
A kind of drilling rod built-in oil pipe combination Download PDFInfo
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- CN208236351U CN208236351U CN201820665654.XU CN201820665654U CN208236351U CN 208236351 U CN208236351 U CN 208236351U CN 201820665654 U CN201820665654 U CN 201820665654U CN 208236351 U CN208236351 U CN 208236351U
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Abstract
A kind of drilling rod built-in oil pipe combination, including two groups of fluid pressure lines disposed in parallel with coupling assembly, nipple assembly and joint steel pipe, external headstock and inscribed headstock, coupling assembly include the first coupling, quick pin end；Coupling assembly is inserted into after the first socket of external headstock with circlip with fixation by the first coupling；Quick pin end is set in the outer upper end counterbore of first coupling；Nipple assembly includes the first nipple, guide sleeve, guide rod, the second nipple, butterfly spring and quick female connector；Nipple assembly is inserted into after the second socket of inscribed headstock with circlip with fixation by the second nipple；Guide sleeve is tightened against the second nipple lower end, and inner hole is equipped with butterfly spring, guide rod；First nipple is tightened against guide rod lower end；Quick female connector is set in the interior intermediate step hole of first nipple；The utility model guarantees that quick coupling accurately connects, and improves the sealing performance of hydraulic oil pipe connection, easy to operate, simple and easy.
Description
Technical field
The utility model relates to a kind of combination of built-in oil pipe, in particular to a kind of hydraulic reaming drilling machine for foundation construction
Drilling rod built-in oil pipe combination.
Background technique
With the construction of the foundation engineerings such as heavy construction, high-speed railway, highway, large bridge and Urban Underground piping lane
Development, for the bearing capacity for improving pile foundation, largely using novel bearings stakes such as various club-footed piles and Bottle gourd piles, which has
Have that structurally reasonable, pile shaft material intensity is high, bearing capacity of single pile is big, increases low withdrawal resistance, danger coefficient, short construction period and engineering
The features such as low cost, therefore be used widely in pile foundation construction.And the construction of above-mentioned various club-footed piles and Bottle gourd pile is completed, mesh
Stake drilling machine is planted in preceding a large amount of uses and popularization static pressure reaming, and it is hard to may pass through sand bed, middle weathered rock formation etc. by the super drilling tool of outfit
Stratum, and ream operation can be carried out in the middle part of stake holes bottom or stake holes after application reaming bit reaming, it is formed more than stake
Big hole, single pile section maximum gauge is up to Ф 1500mm, and drilling depth is up to 100m or more.Reaming drilling machine is complete in ream operation
Cheng Hou injects mud to stake holes bottom by hollow drill pipe inner cavity, finally the prefabricated pile of all kinds of forms is pressed into stake holes, table
Bright static-pressure pile planting technology can improve the bearing capacity of single pile, reduce soil compaction effect, and the work with low-carbon energy-saving, protection environment
With will be more widely used in construction of future cities.For the drilling rod that current hydraulic reaming drilling machine uses, in order to full
Foot provides hydraulic power supply to borehole-enlarging drilling tool built-in extension oil cylinder, and the oil inlet being arranged on drilling rod and oil return line generally have following
Several forms and its there are the problem of: 1) drilling rod inner cavity setting hydraulic oil pipe, by the way of being suspended from drill pipe bore, with brill
The increase of pick depth is when needing adjunction drilling rod, and it is easy to connect and quickly in place not can guarantee its.2) hydraulic oil pipe is arranged in drilling rod
Outside easily makes jackrod structure and installs increasingly complex, oil pipe serious wear, and poor sealing performance, and drilling machine reaming is greatly lowered
Operating efficiency.3) a kind of built-in oil pipe drill rod such as announced in Chinese patent CN103206176A, each unit drilling rod is in upper end
Hexagonal socket bottom is respectively provided with retainer plate and retaining ring, oil inlet pipe and oil return pipe in counterbore step and lower end at outer-hexagonal end surface
It is disposed in parallel relation to one another in drilling rod inner cavity, and the seal receptacle by being set on upper and lower retainer plate is fixed, and quick coupling is revolved
Enter to be located in the seal receptacle of upper end retainer plate, quick coupling seat screws in the seal receptacle for being located at lower end retainer plate.Then, upper and lower
When two drilling rod docking, the quick coupling of the oil inlet pipe and oil return pipe of lower part drilling rod is inserted into the oil inlet pipe of top rod respectively and is returned
The quick coupling seat of oil pipe.This structure setting pattern, cause to connect between oil inlet pipe and oil return pipe and retainer plate it is considerably complicated,
Extreme difficulties are brought to processing, and manufacturing cost is high, oil inlet cannot be effectively ensured in the product after also making installation in use
The sealing performance of pipe and oil return pipe, in use, when and cement grout that drilling rod inner cavity can occur enters in oil pipe, before causing drilling rod
The reaming bit failure at end will affect the timely unlatching and gathering for expanding cutting fin at any time, substantially reduce construction efficiency.
Utility model content
The main purpose of the utility model is to overcome disadvantage existing for existing reaming borer drill rod, provide it is a kind of can be effective
Guarantee the drilling rod built-in oil pipe combination that quick coupling accurately connects, is effectively improved the sealing performance of hydraulic oil pipe connection, operation side
Just, simple and easy, drilling machine ream operation efficiency is improved, Construction Cost is reduced.
The utility model is achieved through the following technical solutions:
A kind of drilling rod built-in oil pipe combination, comprising: two groups disposed in parallel with coupling assembly, nipple assembly and place
The fluid pressure line of joint steel pipe between coupling assembly and nipple assembly, external headstock and inscribed headstock, in which:
External headstock include pedestal with two symmetrical first sockets and the first injected hole and be connected to above pedestal,
And thereon with the flange of the first opposite notch；
Coupling assembly includes the first coupling, quick pin end, circlip and the first O-ring；Among, first is external
Head is equipped with bulge loop on the top of its outer wall, and when being installed in external headstock, the pedestal the of external headstock is shelved on by bulge loop
On one socket bottom end, and its outer wall is divided into the first axle journal and the second following axle journal above by boundary of bulge loop；First is external
Head further include as in the first axle journal corresponding position inner hole outer upper end counterbore, as in the second axle journal corresponding position inner hole
The outer groove and an outer annular groove that outer lower end counterbore and the outer wall opposite with the pedestal of external headstock are equipped with；
Inscribed headstock include pedestal with two symmetrical second sockets and the second injected hole and be connected to below pedestal,
And thereon with the flange of the second opposite notch；
Nipple assembly connects including the first nipple, guide sleeve, guide rod, the second nipple, butterfly spring, quick mother
Head, circlip, the first O-ring, reinforced seal, the second O-ring and third O-ring；Wherein,
Second nipple is equipped with interior two bulge loop on the top of its outer wall, convex by interior two when being installed in inscribed headstock
On the second socket of pedestal top that ring is shelved on, and its outer wall using bulge loop as boundary be divided into the 4th axle journal above and it is following in
Two external screw threads；Second nipple further include as two upper end counterbores in the 4th axle journal position and with the pedestal phase of inscribed headstock
Pair outer wall interior two groove and interior two annular groove that are equipped with；
Guide sleeve is provided, in sequence from bottom to top, with set internal screw thread, set intermediate throughholes and set lower end counterbore, guide sleeve in its inner hole
It further include the set internal channel and set inner groove positioned at set lower end counterbore inner wall；
Guide rod is the scalariform bar of headed, has bar axle journal, bar external screw thread and rod through-hole；
Interior upper end counterbore, an interior internal screw thread, interior intermediate step hole and an interior lower end are equipped in first nipple inner hole
Counterbore further includes the interior annular groove positioned at interior upper end counterbore inner wall；
It is characterized by:
Two groups of fluid pressure lines are formed by connecting by joint steel pipe, coupling assembly and nipple assembly respectively, the company
The both ends for connecing steel pipe are installed in respectively in the outer lower end counterbore of the first coupling and the interior two upper end counterbore of the second nipple；
The external headstock is installed in the scalariform counterbore bottom of the male fitting body from external hollow drill pipe by its flange
Portion；
The second axle journal that the coupling assembly of two groups of fluid pressure lines passes through the first coupling is inserted into described outer respectively
The mode of installation circlip is fixed after two symmetrical first sockets and outside in a groove in plinth, described outer
First O-ring is installed in one annular groove；Quick pin end is set in the outer upper end counterbore of first coupling；
The 4th axle journal that the nipple assembly of two groups of fluid pressure lines passes through the second nipple is inserted into respectively in described
The mode of installation circlip is fixed after two symmetrical second sockets and inside in two grooves in plinth, described interior
First O-ring is installed in two annular grooves；
The guide rod passes through the set lower end counterbore and the first nipple inner hole of guide sleeve by the bar external screw thread of its lower end
In interior internal screw thread spiral shell dress and its bar axle journal be placed in the set lower end counterbore of guide sleeve, and in the set of set lower end counterbore
Groove and set inner groove are then respectively equipped with reinforced seal and third O-ring；
The butterfly spring is constituted with 2 one group of overlappings, multiple groups congruent manner pairing, they are placed in the set of the guide sleeve
In intermediate throughholes and it is located between the upper surface of guide rod and the lower end surface of the second nipple；
The guide sleeve is tightened against on interior two external screw thread of second nipple lower end by the set internal screw thread of the upper end；
An interior annular groove for the interior upper end counterbore of first nipple installs the second O-ring；First nipple
Quick female connector is arranged in hole in an interior intermediate step；
The inscribed headstock is heavy by the scalariform that its flange is installed in socket in the female connector from external hollow drill pipe
Hole bottom.
The utility model can be, and the longitudinal center line of two fluid pressure lines is relative to external headstock and inscribed headstock
Flange excircle parallelism tolerance require be 0.08-0.10mm.
The butterfly spring that the utility model is also possible that in the nipple assembly is assembled to the set intermediate throughholes of guide sleeve
Afterwards, initial pressing force answers >=2.0kN, and pressing force answers >=4.0kN after recompressing 2.10mm.
Detailed description of the invention
Fig. 1 is the combination of the utility model drilling rod built-in oil pipe；
Fig. 2 is sectional view along A-A in Fig. 1；
Fig. 3 is the top view of Fig. 1；
Fig. 4 is the bottom view of Fig. 1.
Specific embodiment
The combination of the utility model drilling rod built-in oil pipe is further described below in conjunction with attached drawing.
A kind of drilling rod built-in oil pipe combination, comprising: two groups disposed in parallel with coupling assembly, nipple assembly and place
The fluid pressure line 27,27 ' of joint steel pipe 26 between coupling assembly and nipple assembly, external headstock 240 and nipple
Seat 250；Wherein:
External headstock 240 includes having two symmetrical first sockets 2401, and 2401 ' and first injected hole 2403,2403 '
Pedestal and be connected to above pedestal and thereon with the flange of the first opposite notch 2402,2402 ', in general, this first is lacked
Mouth also part extends down into and is in the opposite sides of pedestal circumferential surface outer wall；Coupling assembly include the first coupling 245,
Quick pin end 246, circlip 44 and the first O-ring 55；Among, the first coupling 245 is equipped with convex on the top of its outer wall
Ring when being installed in external headstock 240, is shelved on the first socket of pedestal bottom end of external headstock by bulge loop, and its
Outer wall is divided into the first axle journal 2453 and the second following axle journal 2452 above by boundary of bulge loop；First coupling 245 further includes
As in 2453 corresponding position inner hole of the first axle journal outer upper end counterbore 2451, as 2452 corresponding position inner hole of the second axle journal
In the outer groove 24522 that is equipped with of outer lower end counterbore 2454 and the outer wall opposite with the pedestal of external headstock 240 and
An outer annular groove 24521；The external headstock 240 is installed in the rank of the male fitting body from external hollow drill pipe by its flange
Shape counterbore base.
Two groups of fluid pressure lines 27,27 ' connected respectively by joint steel pipe 26, coupling assembly and nipple assembly and
At specifically, the both ends of the joint steel pipe 26 are installed in the outer lower end counterbore 2454 and of the first coupling 245 respectively
In the interior two upper end counterbore 2555 of two nipples 255；In addition, the coupling assembly of two groups of fluid pressure lines 27,27 ' passes through
Second axle journal 2452 of the first coupling 245 is inserted into two symmetrical first sockets 2401 in the external headstock 240 respectively,
2401 ' the modes for installing circlip 44 in a groove 24522 afterwards and outside are fixed, peace in an outer annular groove 24521
Fill the first O-ring 55；Quick pin end 246 is set in the outer upper end counterbore 2451 of first coupling 245；Described two groups
The 4th axle journal 2552 that the nipple assembly of fluid pressure line 27,27 ' passes through the second nipple 255 is inserted into the nipple respectively
Two symmetrical second sockets 2501,2501 ' install the mode of circlip 44 afterwards and inside in seat 250 in two grooves 25522
It is fixed, first O-ring 55 is installed in interior two annular grooves 25521.
The longitudinal center line of two fluid pressure lines 27,27 ' is relative to external 240 flange of headstock and inscribed headstock 250
The parallelism tolerance of flange excircle requires to be 0.08-0.10mm.When the docking of upper and lower part drilling rod is effectively ensured, in the drilling rod of lower part
The quick pin end 246 of two fluid pressure lines 27,27 ' is quick and precisely inserted into top rod the fast of two fluid pressure lines 27,27 '
Fast female connector 256, effectively improves pipeline sealing property.
Inscribed headstock 250 includes having two symmetrical second sockets 2501, and 2501 ' and second injected hole 2503,2503 '
Pedestal and be connected to below pedestal and thereon with the flange of the second opposite notch 2502,2502 ', in general, this second is lacked
Mouth also part extends upward into and is in the opposite sides of pedestal circumferential surface outer wall；Nipple assembly include the first nipple 251,
Guide sleeve 253, guide rod 252, the second nipple 255, butterfly spring 254, quick female connector 256, circlip 44, the first O
Type circle 55, reinforced seal 66, the second O-ring 77 and third O-ring 88；Second nipple 255 is equipped with interior on the top of its outer wall
When being installed in inscribed headstock 250, the second socket of pedestal top of inscribed headstock is shelved on by interior two bulge loop for two bulge loops
On, and its outer wall using bulge loop as boundary be divided into the 4th axle journal 2552 above and it is following in two external screw threads 2553；Second is inscribed
First 255 further include as two upper end counterbores 2555 in 2552 corresponding position inner hole of the 4th axle journal and with inscribed headstock 250
The opposite outer wall of pedestal interior two groove 25522 and interior two annular groove 25521 that are equipped with；Guide sleeve 253 its inner hole from lower and
On be successively arranged set internal screw thread 2533, set intermediate throughholes 2532 and set lower end counterbore 2531, guide sleeve 253 further include be located at set under
Hold the set internal channel 25311 and set inner groove 25312 of 2531 inner wall of counterbore；Guide rod 252 is the scalariform bar of headed, has bar
Axle journal 2522, bar external screw thread 2521 and rod through-hole 2523；Be equipped in first nipple, 251 inner hole includes interior upper end counterbore
2514, an interior internal screw thread 2513, interior intermediate step hole 2512 and interior lower end counterbore 2511 further include being located at an interior upper end to sink
An interior annular groove 25141 for 2514 inner wall of hole.
The guide rod 252 by the bar external screw thread 2521 of its lower end pass through the set lower end counterbore 2531 of guide sleeve 253 with
The set lower end that interior 2513 spiral shell of internal screw thread dress and its bar axle journal 2522 in first nipple, 251 inner hole are placed in guide sleeve 253 is heavy
In hole 2531, and the set internal channel 25311 of set lower end counterbore 2531 and set inner groove 25312 are then respectively equipped with reinforced seal
66 and third O-ring 88；The butterfly spring 254 is constituted with 2 one group of overlappings, multiple groups congruent manner pairing, they are placed in institute
It states in the set intermediate throughholes 2532 of guide sleeve 253 and is located at the upper surface of guide rod 252 and the lower end surface of the second nipple 255
Between；The guide sleeve 253 is tightened against outside interior the two of 255 lower end of the second nipple by the set internal screw thread 2533 of the upper end
On screw thread 2553；An interior annular groove 25141 for the interior upper end counterbore 2514 of first nipple 251 installs the second O-ring 77；
Quick female connector 256 is set in the interior intermediate step hole 2512 of first nipple 251；The inscribed headstock 250 passes through
Its flange is installed in the scalariform counterbore base of socket in the female connector from external hollow drill pipe.
It is initial after butterfly spring 254 in the nipple assembly is assembled to the set intermediate throughholes 2532 of guide sleeve 253
Pressing force answers >=2.0kN, and pressing force answers >=4.0kN after recompressing 2.10mm.In this way, upper and lower part drilling rod pair has been effectively ensured
When connecing, the quick pin end 246 of two fluid pressure lines 27,27 ' is inserted upwardly into fast in quick female connector 256 in the drilling rod of lower part
Speed is properly inserted in place with sufficiently reliable docking, and can be reached when quick pin end 246 is separated from quick female connector 256
It is detached from time, in order to drilling rod disassembly, effectively improves the sealing performance of fluid pressure line.
Quick pin end 246 when the docking of upper and lower two drilling rods, in underlying lower part drilling rod built-in oil pipe combination
After the quick female connector 256 in the top rod built-in oil pipe combination that insertion is located above, the upward pushing tow of the first coupling 245
First nipple 251 and therewith spiral shell fillConnectionGuide rod 252 after butterfly spring 254 applied and keep an active force,
As a compensation stroke, be conducive to the connection of built-in oil pipe；The interior lower end counterbore 2511 of first nipple 251 is quick
It is matched as pilot hole when pin end is inserted into quick female connector and with the first axle journal 2453 of the first coupling 245；Hollow
Gap between drilling rod inner cavity and two groups of built-in oil pipes is the transfer pipeline as cement grout, and by being arranged in outer plinth
Symmetrical first injected hole 2403,2403 ' of two of 240 pedestals in opposite the first notch of pedestal upper outer wall and flange
2402,2402 ', two symmetrical second sockets 2501 of interior 250 pedestal of plinth are set, 2501 ' and second injected hole
2503,2503 ' sum is connected to pedestal upper outer wall and opposite the second notch 2502,2502 ' of flange for entire hollow drill pipe
Grouting pipeline connection.Start grouting with plunger construction after the completion of ream operation, there will be a certain proportion of cement grout to inject
In the hole that preboring is completed, whole drilling rods are extracted, prefabricated pile are pressed into prebored hole, to cement grout and prefabricated pile completion of cure knot
It completes to plant stake operation after conjunction.
The combination of the utility model drilling rod built-in oil pipe guarantees that male and female quick coupling accurately connects, and is effectively improved hydraulic oil pipe company
The sealing performance connect has the characteristics that convenient and simple for operation easy and safe and reliable, the ream operations efficiency such as raising drilling machine, greatly
Amplitude reduction Construction Cost.
Without departing from the utility model general plotting, various transformation can also be done to the utility model and are changed
Into, as long as but it is identical as the utility model composition or equivalent if, also belong to the protection scope of the utility model.
Claims (3)
1. a kind of combination of drilling rod built-in oil pipe, comprising: two groups disposed in parallel to have coupling assembly, nipple assembly and be in
The fluid pressure line (27,27 ') of joint steel pipe (26) between coupling assembly and nipple assembly, external headstock (240) and interior
Plinth (250), in which:
External headstock (240) include with two symmetrical first sockets (2401,2401 ') and the first injected hole (2403,
2403 ') pedestal and the flange for being connected to above pedestal and having thereon opposite the first notch (2402,2402 ')；
Coupling assembly includes the first coupling (245), quick pin end (246), circlip (44) and the first O-ring
(55)；Among, the first coupling (245) is equipped with bulge loop on the top of its outer wall, when being installed in external headstock (240), leads to
It crosses bulge loop to be shelved on the first socket of pedestal bottom end of external headstock, and its outer wall is divided into first axle above by boundary of bulge loop
Neck (2453) and following the second axle journal (2452)；First coupling (245) further includes as the first axle journal (2453) corresponding positions
Set outer upper end counterbore (2451) in inner hole, as the outer lower end counterbore in the inner hole of the second axle journal (2452) corresponding position
(2454) and the outer groove (24522) that is equipped with of the outer wall opposite with the pedestal of external headstock (240) and an outer annular groove
(24521)；
Inscribed headstock (250) include with two symmetrical second sockets (2501,2501 ') and the second injected hole (2503,
2503 ') pedestal and the flange for being connected to below pedestal and having thereon opposite the second notch (2502,2502 ')；
Nipple assembly includes the first nipple (251), guide sleeve (253), guide rod (252), the second nipple (255), butterfly
Shape spring (254), quick female connector (256), circlip (44), the first O-ring (55), reinforced seal (66), the second O-ring
(77) and third O-ring (88)；Wherein,
Second nipple (255) is equipped with interior two bulge loop on the top of its outer wall and passes through when being installed in inscribed headstock (250)
Interior two bulge loop is shelved on the second socket of pedestal top of inscribed headstock, and its outer wall using bulge loop as boundary be divided into above the 4th
Axle journal (2552) and following interior two external screw thread (2553)；Second nipple (255) further includes as the 4th axle journal (2552) phase
Interior two upper end counterbore (2555) and the outer wall opposite with the pedestal of inscribed headstock (250) in the inner hole of position is answered to be equipped with interior
Two grooves (25522) and interior two annular groove (25521)；
Guide sleeve (253) is in the case where its inner hole is provided, in sequence from bottom to top, with set internal screw thread (2533), set intermediate throughholes (2532) and covers
It holds counterbore (2531), guide sleeve (253) further includes in the set internal channel (25311) and set of set lower end counterbore (2531) inner wall
Annular groove (25312)；
Guide rod (252) is the scalariform bar of headed, has bar axle journal (2522), bar external screw thread (2521) and rod through-hole
(2523)；
Interior upper end counterbore (2514), an interior internal screw thread (2513), an interior intermediate step are equipped in first nipple (251) inner hole
Hole (2512) and interior lower end counterbore (2511) further include the interior annular groove positioned at interior upper end counterbore (2514) inner wall
(25141)；
It is characterized by:
Two groups of fluid pressure lines (27,27 ') connected respectively by joint steel pipe (26), coupling assembly and nipple assembly and
At the both ends of the joint steel pipe (26) are installed in the outer lower end counterbore (2454) and second of the first coupling (245) respectively
In the interior two upper end counterbore (2555) of nipple (255)；
The external headstock (240) is installed in the scalariform counterbore bottom of the male fitting body from external hollow drill pipe by its flange
Portion；
The coupling assembly of two groups of fluid pressure lines (27,27 ') passes through the second axle journal (2452) of the first coupling (245)
Be inserted into the external headstock (240) two symmetrical first sockets (2401,2401 ') respectively afterwards and outside groove
(24522) mode of installation circlip (44) is fixed in, installs the first O-ring in an outer annular groove (24521)
(55)；The quick pin end (246) of setting in the outer upper end counterbore (2451) of first coupling (245)；
The nipple assembly of two groups of fluid pressure lines (27,27 ') passes through the 4th axle journal (2552) of the second nipple (255)
Be inserted into the inscribed headstock (250) two symmetrical second sockets (2501,2501 ') respectively afterwards and inside two groove
(25522) mode of installation circlip (44) is fixed in, installs the first O-ring in interior two annular grooves (25521)
(55)；
The guide rod (252) passes through the set lower end counterbore of guide sleeve (253) by the bar external screw thread (2521) of its lower end
(2531) it is filled with an interior screw thread (2513) spiral shell in the first nipple (251) inner hole and its bar axle journal (2522) is placed in guide sleeve
(253) in set lower end counterbore (2531), and the set internal channel (25311) of set lower end counterbore (2531) and set inner groove
(25312) reinforced seal (66) and third O-ring (88) are then respectively equipped with；
The butterfly spring (254) is constituted with 2 one group of overlappings, multiple groups congruent manner pairing, they are placed in the guide sleeve
(253) in set intermediate throughholes (2532) and it is located at the upper surface of guide rod (252) and the lower end surface of the second nipple (255)
Between；
The guide sleeve (253) is tightened against the second nipple (255) lower end by the set internal screw thread (2533) of the upper end
On interior two external screw thread (2553)；
An interior annular groove (25141) for the interior upper end counterbore (2514) of first nipple (251) installs the second O-ring
(77)；The quick female connector (256) of setting in the interior intermediate step hole (2512) of first nipple (251)；
The inscribed headstock (250) is heavy by the scalariform that its flange is installed in socket in the female connector from external hollow drill pipe
Hole bottom.
2. drilling rod built-in oil pipe combination according to claim 1, it is characterised in that two fluid pressure lines (27,27 ')
Longitudinal center line relative to the parallelism tolerance of external headstock (240) and the flange excircle of inscribed headstock (250) require be
0.08-0.10mm。
3. drilling rod built-in oil pipe combination according to claim 1, it is characterised in that the butterfly bullet in the nipple assembly
After spring (254) is assembled to the set intermediate throughholes (2532) of guide sleeve (253), initial pressing force answers >=2.0kN, recompression
Pressing force answers >=4.0kN after 2.10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820665654.XU CN208236351U (en) | 2018-05-07 | 2018-05-07 | A kind of drilling rod built-in oil pipe combination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820665654.XU CN208236351U (en) | 2018-05-07 | 2018-05-07 | A kind of drilling rod built-in oil pipe combination |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208236351U true CN208236351U (en) | 2018-12-14 |
Family
ID=64582099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820665654.XU Withdrawn - After Issue CN208236351U (en) | 2018-05-07 | 2018-05-07 | A kind of drilling rod built-in oil pipe combination |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208236351U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108412434A (en) * | 2018-05-07 | 2018-08-17 | 上海广大基础工程有限公司 | A kind of drilling rod built-in oil pipe combination |
-
2018
- 2018-05-07 CN CN201820665654.XU patent/CN208236351U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108412434A (en) * | 2018-05-07 | 2018-08-17 | 上海广大基础工程有限公司 | A kind of drilling rod built-in oil pipe combination |
| CN108412434B (en) * | 2018-05-07 | 2023-09-05 | 上海广大基础工程有限公司 | Built-in oil pipe combination of drilling rod |
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