CN104879071B - Rotation joint element for bar - Google Patents
Rotation joint element for bar Download PDFInfo
- Publication number
- CN104879071B CN104879071B CN201510311656.XA CN201510311656A CN104879071B CN 104879071 B CN104879071 B CN 104879071B CN 201510311656 A CN201510311656 A CN 201510311656A CN 104879071 B CN104879071 B CN 104879071B
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- China
- Prior art keywords
- swingle
- clamp nut
- joint element
- bar
- rotation joint
- Prior art date
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Links
- 230000007246 mechanism Effects 0.000 claims description 17
- 244000309464 bull Species 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract 1
- 238000005553 drilling Methods 0.000 description 17
- 230000001360 synchronised effect Effects 0.000 description 4
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- 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
- E21B17/042—Threaded
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
- Clamps And Clips (AREA)
Abstract
The invention belongs to connector technical field, is related to a kind of rotation joint element for bar.Solve prior art construction complexity, connect insecure technical problem.It includes the first swingle and the second swingle, the first described swingle and the second swingle are engaged by clamping, the female clamp nut of tool is arranged with the first described swingle, second rotation boom end has external screw thread, internal thread is matched with external screw thread, when the first swingle and the second swingle are moved toward the direction being located remotely from each other, the first described swingle can be adjacent to so as to drive clamp nut to rotate along the direction with the second swingle screw tightly with clamp nut.Present configuration is simple, easy to connect reliable, with self-retaining effect.
Description
Technical field
The invention belongs to connector technical field, is related to a kind of rotation joint element for bar, it is adaptable to need to be attached lengthening
And carry out the operation of rotary work.
Background technology
Swingle refers to need the strip straight-bar for carrying out rotary operation, such as oil exploration industry in the course of the work,
Building trade, natural gas extraction industry, different degrees of in mineral industry be required to use above-mentioned swingle, when swingle is in
During vertical operation, normally referred to as drilling rod, as same drilling rod cannot reach the depth of needs, it is therefore desirable to different brills
Bar is attached effect.The drilling rod connection of prior art is generally using threaded, it is contemplated that threaded connection place is most weak
Place, can be thickeied in junction or honest and sincere, and this connected mode can improve certain intensity, but when drilling rod carries out multistage
During connection, often bend in junction, influence.In order to change such case, people are by the way of the clamping pair
Drilling rod is attached, and access section with anchor ear fasten improve clamping intensity, in order in drilling rod when rotating and reverse,
Junction will not depart from.But as anchor ear is with two drilling rods of junction while rotation, produces to anchor ear and greatly shear
Power, easily makes anchor ear impaired during Long-Time Service, so that drilling rod departs from.
People are through constantly exploring, it is proposed that various solutions, such as Chinese patent literature disclose one kind
Drilling rod connector [notification number：203035110 U of CN], including connecting shaft and terminal pad, the connecting shaft and connection disk center are equal
Through hole is had, the connecting shaft lower end is connected with installation axle, installation axle bottom is provided with the keyway of spill at periphery, described
Terminal pad is provided with the convex bond structure matched with keyway in through hole, and the connecting shaft and terminal pad are by keyway and convex
Bond structure is connected integral structure.
The guidance quality of such scheme is good and can protect drilling rod well.When using, connecting shaft passes through key with terminal pad
Slot structure is fitted to each other connection, Positioning screw through positioning screw hole and tapped through hole will the two axial restraint, connecting shaft upper end with
Drilling rod drive mechanism is fixedly connected, and drilling rod passes through the through hole in connecting shaft and terminal pad, in a drilling rod part and terminal pad through hole
Structure match, drilling rod appropriate section and terminal pad through hole inner structure are fixed to clamp by clamping device after coordinating, so brill
Bar just rotation work under the drive of connecting shaft and terminal pad.Thus it is recognised that drilling rod be need to by clamping fill
Put and connection could be realized, therefore when actually used, have inconvenience, be not suitable for popularization and application.
Content of the invention
The purpose of the present invention is for the problems referred to above, provides a kind of simple structure, the reliable rotation joint element for bar of connection.
For above-mentioned purpose is reached, following technical proposal is present invention employs：A kind of rotation joint element for bar, including the first rotation
Bar and the second swingle, the first described swingle and the second swingle are engaged by clamping, and are arranged with the first described swingle
Has female clamp nut, the second rotation boom end has external screw thread, and internal thread is matched with external screw thread, when the first rotation
, toward during the direction motion being located remotely from each other, the first described swingle can be adjacent to so as to drive with clamp nut for bar and the second swingle
Clamp nut is rotated along the direction with the second swingle screw tightly.
In above-mentioned rotation joint element for bar, with position-limit mechanism on the first described swingle, when clamp nut is sheathed
When on the first swingle, described position-limit mechanism can prevent clamp nut from departing from the first swingle, and when the first swingle and
Second swingle toward the direction that is located remotely from each other move when, position-limit mechanism can compress clamp nut so as to drive clamp nut along with
The direction of the second swingle screw tightly rotates.
In above-mentioned rotation joint element for bar, described position-limit mechanism includes prominent first swingle outer wall and in annular shape
Spacing ring, the inner wall of end of described clamp nut reduces the locating ring to be formed in a ring, and the internal diameter of described locating ring is big
The external diameter of spacing ring is less than in the external diameter of the first swingle.
In above-mentioned rotation joint element for bar, described locating ring and internal thread are located at the two ends of clamp nut respectively, when
When clamp nut is set on the first swingle, internal thread and locating ring are respectively positioned at the both sides of spacing ring.
In above-mentioned rotation joint element for bar, the end of the first described swingle has the company projected along direction of axis line
Connect post or with along the recessed connecting hole of direction of axis line, the end of the second described swingle has recessed along direction of axis line
Connecting hole or with the connecting post projected along direction of axis line, the cross section of connecting post and the cross section of connecting hole are not rounded
Shape, and connecting post and connecting hole be mutually matched.
In above-mentioned rotation joint element for bar, the cross section of described connecting post is triangle or polygon, described company
The cross section for connecing hole is triangle or polygon.
In above-mentioned rotation joint element for bar, the cross section of described connecting post and connecting hole is positive six side being mutually matched
Shape.
In above-mentioned rotation joint element for bar, it is respectively provided with the middle of the first described swingle and the second swingle hollow logical
Road, and hollow passageway connects the two ends of the first swingle and the second swingle.
In above-mentioned rotation joint element for bar, one is additionally provided with the first described swingle when clamp nut and the second rotation
Bull stick can be positioned so that the locking gear for preventing clamp nut from departing from the second swingle to clamp nut when connecting.
In above-mentioned rotation joint element for bar, described locking gear includes support beam, described support beam one end
Be detachably connected with the first swingle, the other end is hinged with locking bar, described clamp nut top have with locking
The antiratchetting groove that bar matches, when locking bar is inserted in antiratchetting groove, clamp nut can be withstood so as to prevent in the end of locking bar
Clamp nut loosens.
In above-mentioned rotation joint element for bar, described support beam is uniformly set along the axial line circumference of the first swingle
Put, described antiratchetting groove is corresponded with support beam.
Compared with prior art, it is an advantage of the current invention that：Can prevent the junction of swingle from departing from, with self-retaining
Effect, safe and reliable.
Description of the drawings
Fig. 1 is the structural representation that the present invention is provided；
Fig. 2 is the explosive view that the present invention is provided；
Fig. 3 is the A-A sectional view of Fig. 2；
Fig. 4 is the structural representation of the second swingle；
Fig. 5 is another kind of structural representation of the second swingle；
Fig. 6 is another kind of structural representation of the second swingle；
Fig. 7 is another kind of structural representation of the second swingle；
Fig. 8 is another kind of structural representation that the present invention is provided；
Fig. 9 is the A direction view of Fig. 8.
In figure：First swingle 10, position-limit mechanism 11, spacing ring 12, the second swingle 20, external screw thread 21, clamp nut
30th, internal thread 31, locating ring 32, connecting post 41, connecting hole 42, hollow passageway 50, locking gear 60, support beam 61, locking
Bar 62, antiratchetting groove 63, bolt 64.
Specific embodiment
The present invention will be further described in detail with reference to the accompanying drawings and detailed description.
As shown in Figure 1, Figure 2 and Figure 3, a kind of rotation joint element for bar, including the first swingle 10 and the second swingle 20, institute
The first swingle 10 that states and the second swingle 20 are engaged by clamping, and are arranged with internal thread 31 on the first described swingle 10
Clamp nut 30,20 end of the second swingle has external screw thread 21, and internal thread 31 is matched with external screw thread 21, when the first rotation
, toward during the direction motion being located remotely from each other, the first described swingle 10 can be adjacent to clamp nut 30 for bar 10 and the second swingle 20
So as to drive clamp nut 30 to rotate along the direction with 20 screw tightly of the second swingle.
The operation principle of the present invention is：When the first swingle 10 and the second swingle 20 are moved toward direction close to each other
When, as the first swingle 10 and the second swingle 20 are engaged by clamping, therefore will not be mutually disengaged；When the first swingle 10 and
Two swingles 20 are up moved toward such as the first swingle 10 during the direction motion being located remotely from each other, and the second swingle 20 is also in original
Position, in order that the first swingle 10 and the second swingle 20 are synchronized with the movement, must between the first swingle 10 and the second swingle 20
Can not so there is space or free travel, otherwise will be unable to realize synchronous axial system and even result in the first swingle 10 and the second rotation
Bar 20 departs from, the clamp nut 30 that the present invention is provided when the first swingle 10 is moved toward the direction for departing from the second swingle 20,
Clamp nut 30 can be adjacent to the first swingle 10 and with 10 rotating Vortex of the first swingle, and rotary course be precisely internal thread 31
The process mutually screwed tight with external screw thread 21, in this process, clamp nut 30 and the second swingle 20 are spirally connected fixation, fasten spiral shell
Female 30 are adjacent to the first swingle 10, and therefore clamp nut 30 plays function served as bridge, keep the first swingle 10 and the second rotation
The connection of bar 20.As for the cooperation of internal thread 31, external screw thread 21 and direction of rotation, it is the common knowledge of those skilled in the art,
Direction of rotation when only operationally need to be located remotely from each other the first swingle 10 and the second swingle 20 and internal thread 31 and outer spiral shell
Line 21 to screw tight direction consistent.
Specifically, with position-limit mechanism 11 on the first swingle 10, when clamp nut 30 is set in the first swingle 10
When upper, described position-limit mechanism 11 can prevent clamp nut 30 from departing from the first swingle 10, and when the first swingle 10 and second
Swingle 20 toward the direction being located remotely from each other move when, position-limit mechanism 11 compress clamp nut 30 so as to drive clamp nut 30 along
Rotate with the direction of 20 screw tightly of the second swingle.
In particular, position-limit mechanism 11 includes prominent first swingle, 10 outer wall and in circular spacing ring 12, institute
The inner wall of end of the clamp nut 30 that states reduces the locating ring 32 to be formed in a ring, and the internal diameter of described locating ring 32 is more than first
The external diameter of swingle 10 and be less than the external diameter of spacing ring 12.Obviously, spacing ring 12 is also not necessarily required to annular, only needs to block
Locating ring 32.
Operationally, that is, when clamp nut 30 is set on the first swingle 10, locating ring 32 and internal thread 31
The two ends of clamp nut 30, when clamp nut 30 be set in first swingle 10 on, internal thread 31 and locating ring are located at respectively
32 both sides for being located at spacing ring 12 respectively.
As shown in figs. 4-7, the end of the first swingle 10 has along the connecting post 41 of direction of axis line protrusion or with edge
The recessed connecting hole 42 of direction of axis line, the end of the second described swingle 20 have along the recessed connecting hole of direction of axis line
42 or with the connecting post 41 projected along direction of axis line, the shape of connecting post 41 and connecting hole 42, size match, and are post
Shape.The cross section of the cross section of connecting post 41 and connecting hole 42 is non-circular, that is to say, that the cross section of connecting post 41 and connection
The distance at the center of the cross section in hole 42 to edge is unequal, and connecting post 41 and connecting hole 42 are mutually matched, when connecting post 41
When being inserted in connecting hole 42, connecting post 41 is with 42 clamping of connecting hole so that the first swingle 10 and 20 clamping of the second swingle
Coordinate and energy synchronous rotary.
The cross section of connecting post 41 is triangle or polygon, and the cross section of described connecting hole 42 is triangle or polygon
Shape.For the ease of being inserted in connecting hole 42, the end of connecting post 41 is provided with chamfering.Preferred version, connecting post 41 and connecting hole
42 cross section is the regular hexagon being mutually matched.
In the prior art, as, during drilling rod work, when needing to pierce the such as oil exploration of deeper depth, piling, needed
Swingle is attached, during extension arm, the first swingle 10 and the second swingle 20 are generally carried out admittedly using anchor ear
Fixed, to prevent two swingles from departing from, but the mode of anchor ear connection exists and is disadvantageous in that, can be to embracing in rotary course
Hoop becomes shearing force, and anchor ear can be caused to rupture, and two swingles depart from, and causes security incident so as to cause work to fail.At this
In invention, when the first swingle 10 is pressed on the second swingle 20, the first swingle 10 with clamp nut 30 be discontiguous,
Shearing force will not be produced, and when the first swingle 10 is lifted up, spacing ring 12 contacts locating ring 32 so as to force fastening spiral shell
Female 30 rotate, and clamp nut 30 is screwed tight with the second swingle 20, prevents the first swingle 10 from departing from the second swingle 20, from
And making the first swingle 10 and 20 Synchronous lifting of the second swingle, that is to say, that clamp nut 30 plays a part of self-retaining.
Embodiment 2
The present embodiment is essentially identical with the structure of embodiment 1 and operation principle, and difference is, as Fig. 8 and Fig. 9 institute
Show, hollow passageway 50 in the middle of the first swingle 10 and the second swingle 20, is respectively provided with, and the connection of hollow passageway 50 first rotates
Bar 10 and the two ends of the second swingle 20.Cement mortar etc. can be injected in hollow passageway 50, more so as to give the present invention
Function, such as can make cement mixing pile simultaneously in drilling.
Being additionally provided with one on first swingle 10 can be to clamp nut when clamp nut 30 is connected with the second swingle 20
30 are positioned so that the locking gear 60 for preventing clamp nut 30 from departing from the second swingle 20.
Locking gear 60 includes support beam 61, and described 61 one end of support beam is detachably connected with the first swingle 10
, being threaded in the first swingle 10 in the end fixing bolt 64 of support beam 61, the other end is hinged with a locking bar
62, described 30 top of clamp nut has the antiratchetting groove 63 matched with locking bar 62, when locking bar 62 is inserted into antiratchetting groove
When in 63, clamp nut 30 can be withstood so as to prevent clamp nut from loosening in the end of locking bar 62.
When support beam 61 has multiple, support beam 61 is uniformly arranged along the axial line circumference of the first swingle 10, institute
The antiratchetting groove 63 that states is corresponded with support beam 61.
When the first swingle 10 is pushed, the rotation direction of the screwed tight direction of clamp nut 30 and the first swingle 10
It is contrary, therefore clamp nut 30 is possible to depart from the first swingle 10, in order to prevent departing from, the present embodiment devises locking
Mechanism 60, locking bar 62 are inserted in antiratchetting groove 63, can withstand clamp nut 30, also limit the position of clamp nut 30
Put.
The position-limit mechanism 11 of the present embodiment is also slightly different with embodiment 1, and the end of the first swingle 10 is expanded and can be blocked
Clamp nut 30, in the junction of the first swingle 10 and the second swingle 20 still using connecting post 41 and connecting hole 42
Structure.
Specific embodiment described herein is only explanation for example to present invention spirit.The affiliated technology neck of the present invention
The technical staff in domain can be made various modifications or supplement or replaced using similar mode to described specific embodiment
Generation, but the spirit without departing from the present invention or surmount scope defined in appended claims.
Although more employing the first swingle 10, position-limit mechanism 11, spacing ring 12, the second swingle 20, outer herein
Screw thread 21, clamp nut 30, internal thread 31, locating ring 32, connecting post 41, connecting hole 42, hollow passageway 50, locking gear 60,
The terms such as support beam 61, locking bar 62, antiratchetting groove 63, but the possibility being not precluded from using other terms.Using these arts
Language is just for the sake of more easily describing and explaining the essence of the present invention；Being construed as any additional restriction is all
Contrary with spirit of the present invention.
Claims (10)
1. a kind of rotation joint element for bar, including the first swingle (10) and the second swingle (20), it is characterised in that described the
One swingle (10) and the second swingle (20) are engaged by clamping, and are arranged with internal thread on described the first swingle (10)
(31) clamp nut (30), the second swingle (20) end have external screw thread (21), internal thread (31) and external screw thread (21) phase
Coupling, when the first swingle (10) and the second swingle (20) are toward the direction motion being located remotely from each other, described the first swingle
(10) can be adjacent to so as to drive clamp nut (30) along the direction with the second swingle (20) screw tightly with clamp nut (30)
Rotation.
2. rotation joint element for bar according to claim 1, it is characterised in that with limit on described the first swingle (10)
Position mechanism (11), when clamp nut (30) is set in the first swingle (10) above, described position-limit mechanism (11) can prevent tightly
Gu nut (30) departs from the first swingle (10), and when the first swingle (10) and the second swingle (20) are toward the side being located remotely from each other
To motion when, position-limit mechanism (11) can compress clamp nut (30) so as to drive clamp nut (30) along with the second swingle
(20) direction of screw tightly rotates.
3. rotation joint element for bar according to claim 2, it is characterised in that described position-limit mechanism (11) includes prominent the
One swingle (10) outer wall and the spacing ring (12) in annular shape, the inner wall of end of described clamp nut (30) reduce to be formed and are in
The locating ring (32) of annular, the internal diameter of described locating ring (32) are less than spacing ring more than the external diameter of the first swingle (10)
(12) external diameter.
4. rotation joint element for bar according to claim 3, it is characterised in that described locating ring (32) and internal thread (31)
The two ends of clamp nut (30) are located at respectively, when clamp nut (30) is set in the first swingle (10) above, internal thread (31)
The both sides of spacing ring (12) are located at locating ring (32) respectively.
5. the rotation joint element for bar according to claim 1 or 2 or 3 or 4, it is characterised in that the first described swingle
(10) end has the connecting post (41) that projects along direction of axis line or with along the recessed connecting hole of direction of axis line (42),
The end of described the second swingle (20) has along the recessed connecting hole of direction of axis line (42) or has along direction of axis line
Prominent connecting post (41), the cross section of the cross section of connecting post (41) and connecting hole (42) are non-circular, and connecting post (41)
It is mutually matched with connecting hole (42).
6. rotation joint element for bar according to claim 5, it is characterised in that the cross section of described connecting post (41) is many
Side shape, the cross section of described connecting hole (42) is polygon.
7. the rotation joint element for bar according to claim 1-4 any one, it is characterised in that the first described swingle
(10) hollow passageway (50) is respectively provided with the middle of and the second swingle (20), and hollow passageway (50) connects the first swingle (10)
Two ends with the second swingle (20).
8. the rotation joint element for bar according to claim 1-4 any one, it is characterised in that the first described swingle
(10) it is additionally provided with one to position clamp nut (30) when clamp nut (30) is connected with the second swingle (20) on
So as to prevent clamp nut (30) from departing from the locking gear (60) of the second swingle (20).
9. rotation joint element for bar according to claim 8, it is characterised in that described locking gear (60) includes at least
Individual support beam (61), described support beam (61) one end and the first swingle (10) are detachably connected, and the other end is hinged
Have one locking bar (62), described clamp nut (30) top has the antiratchetting groove (63) matched with locking bar (62), when
When locking bar (62) are inserted in antiratchetting groove (63), clamp nut (30) can be withstood so as to prevent fastening in the end of locking bar (62)
Nut loosening.
10. rotation joint element for bar according to claim 9, it is characterised in that described support beam (61) is along the first rotation
The axial line circumference of bull stick (10) is uniformly arranged, and described antiratchetting groove (63) is corresponded with support beam (61).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510311656.XA CN104879071B (en) | 2015-06-09 | 2015-06-09 | Rotation joint element for bar |
| PCT/CN2016/000298 WO2016197595A1 (en) | 2015-06-09 | 2016-06-07 | Rotary rod connecting piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510311656.XA CN104879071B (en) | 2015-06-09 | 2015-06-09 | Rotation joint element for bar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104879071A CN104879071A (en) | 2015-09-02 |
| CN104879071B true CN104879071B (en) | 2017-03-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510311656.XA Active CN104879071B (en) | 2015-06-09 | 2015-06-09 | Rotation joint element for bar |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104879071B (en) |
| WO (1) | WO2016197595A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104879071B (en) * | 2015-06-09 | 2017-03-08 | 周兆弟 | Rotation joint element for bar |
| CN107299758A (en) * | 2017-07-07 | 2017-10-27 | 青岛林川工程技术咨询有限公司 | A kind of locking device of Side shuttering vertical supporting |
| CN108661572A (en) * | 2018-07-24 | 2018-10-16 | 江苏拓创科研仪器有限公司 | A kind of connection fastening type oil drill rocker |
| CN110344988B (en) * | 2019-07-15 | 2020-07-03 | 东北师范大学 | Horizontal shaft tidal current energy water turbine experiment assistor and using method thereof |
| CN112983294A (en) * | 2019-12-13 | 2021-06-18 | 周兆弟 | Butt joint device, drill rod and pile machine |
| CN113833410B (en) * | 2021-09-10 | 2024-03-26 | 中国矿业大学 | Threaded connection type drill rod device capable of being automatically assembled and disassembled in forward and reverse rotation mode and working method |
| CN113915197A (en) * | 2021-11-11 | 2022-01-11 | 宁波雄镇科技有限公司 | Anti-loosening connecting structure for high-precision piston rod |
| CN117770909B (en) * | 2024-02-28 | 2024-05-14 | 桐庐优视医疗器械有限公司 | Easily-disassembled abdominal cavity forceps |
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| CN200985747Y (en) * | 2006-12-19 | 2007-12-05 | 李华斌 | Pyramid inserted type drill pipe joint |
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| CN104879071B (en) * | 2015-06-09 | 2017-03-08 | 周兆弟 | Rotation joint element for bar |
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- 2015-06-09 CN CN201510311656.XA patent/CN104879071B/en active Active
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2016
- 2016-06-07 WO PCT/CN2016/000298 patent/WO2016197595A1/en active Application Filing
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| US6607220B2 (en) * | 2001-10-09 | 2003-08-19 | Hydril Company | Radially expandable tubular connection |
| JP2006241836A (en) * | 2005-03-03 | 2006-09-14 | Mitsubishi Materials Corp | Joint structure, and impact type digger having the joint structure |
| CN200985748Y (en) * | 2006-12-21 | 2007-12-05 | 新疆石油管理局钻井工艺研究院 | Rotetable type casing tube flexible joint |
| CN201972615U (en) * | 2011-03-14 | 2011-09-14 | 中国石油天然气股份有限公司 | Plug rod safety joint and plug rod assembly |
| KR101349069B1 (en) * | 2013-09-09 | 2014-01-16 | 한국지질자원연구원 | Flange cpopling structure for drilling riser |
| CN104265189A (en) * | 2014-09-05 | 2015-01-07 | 无锡中地地质装备有限公司 | Elastic clip chamber structure for drilling tool clamping |
| CN204252867U (en) * | 2014-11-28 | 2015-04-08 | 曹晓彦 | A kind of hollow drill of oil drilling |
| CN204782820U (en) * | 2015-06-09 | 2015-11-18 | 周兆弟 | Connected with rotary rod spare |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016197595A1 (en) | 2016-12-15 |
| CN104879071A (en) | 2015-09-02 |
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