CN202483469U - Drilling rod and rotary drilling rig - Google Patents
Drilling rod and rotary drilling rig Download PDFInfo
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- CN202483469U CN202483469U CN 201220102919 CN201220102919U CN202483469U CN 202483469 U CN202483469 U CN 202483469U CN 201220102919 CN201220102919 CN 201220102919 CN 201220102919 U CN201220102919 U CN 201220102919U CN 202483469 U CN202483469 U CN 202483469U
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- 238000005553 drilling Methods 0.000 title claims abstract description 57
- 210000001624 hip Anatomy 0.000 claims abstract description 26
- 230000007704 transition Effects 0.000 claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 abstract description 21
- 239000010959 steel Substances 0.000 abstract description 21
- 238000003466 welding Methods 0.000 abstract description 7
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 21
- 230000008569 process Effects 0.000 description 13
- 238000012546 transfer Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 7
- 238000012545 processing Methods 0.000 description 6
- 238000005336 cracking Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 230000035800 maturation Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002153 concerted effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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Abstract
The utility model provides a drilling rod which is formed by a plurality of concentric pipes which are sleeved with one another. An inner key strip is arranged on the inner wall of one pipe on the outer layer between the adjacent two pipes; an outer key strip which is matched with the inner key strip is arranged on the outer wall of one pipe on the inner layer; the cross section of the outer key strip is tooth-shaped; the lower bottom edge of the tooth-shaped section of the outer key strip is fixedly connected with the outer wall of the pipe on the inner layer; the lower bottom edge of the tooth-shaped section of the outer key strip is longer than the upper bottom edge of the tooth-shaped section of the outer key strip; and a transition edge is formed at the intersection parts between the two waists of the tooth-shaped section of the outer key strip and the lower bottom edge of the tooth-shaped section of the outer key strip. The utility model provides a rotary drilling rig. According to the technical scheme disclosed by the utility model, automatic core alignment can be realized, and further, the three groups of key strips can uniformly transmit pressures and torque, so that the axial stability is improved, and the deformation, caused by ununiform stress, of a steel pipe is reduced; and meanwhile, a welding line region is distinguished from a stress concentrating region, so that the service life of a welding line is prolonged.
Description
Technical field
The utility model relates to the plant equipment field, more specifically, relates to a kind of novel drilling rod and has the rotary drilling rig of this novel drilling rod.
Background technology
At present, the external key sliver transvers section of the used drilling rod in various countries is type of being rectangle all, and promptly the dual-side of external key bar is vertical with at least one bottom surface, and a base of external key bar is that arc surface or two bases all are arc surface or two situation that the base all is a flat face.
In concrete drilling rod manufacture process, with the two-sided chamfering in key bar one base (the key bar that arc surface is arranged is on the base that arc surface is arranged).The key bar of chamfering is welded to outer surface of steel tube (key bar arc surface is cooperated with steel tube surface), and at inside tube one end welding internal key, interior key length is about 1 meter, an end is concordant with tube end.
A significant drawbacks of this square-section key bar is; Stress when the root of weld is the work of key bar is again concentrated the position; Therefore the commissure is the most dangerous position in the course of the work, under the effect of various alternating stresseses, can cause weld cracking, has a strong impact on the application life of drilling rod.
Key bar and weld seam discontinuity often appear in the external key bar drilling rod of rectangle in application process, the body distortion is serious and then cause mode of failure such as the vertical or horizontal cracking of body, T type weld cracking.The torsion pass of this drilling rod and the ability of pressure transmission all receive very big restriction, have promptly increased manufacturing cost and technical difficulty, make this structure drilling rod under big pressure and high pulling torque condition of work, be difficult to development space again.
The utility model content
In order to solve the problems referred to above of prior art, first purpose of the utility model is to provide a kind of drilling rod, overcomes existing drilling rod and key bar and defectives such as weld seam discontinuity, body distortion often occur.The utility model also provides a kind of rotary drilling rig.
In order to realize first purpose of the utility model; The utility model provides a kind of drilling rod; It is connect by concentric a plurality of pipe boxes and forms, and the inwall that is in outer field pipe between adjacent two pipes is provided with the internal key bar, and the outer wall that is in the pipe of internal layer is provided with the external key bar that matches with said internal key bar; The cross section of said external key bar is profile of tooth; The bottom in said profile of tooth cross section is fixedly connected with the said outer wall that is in the pipe of internal layer, and the last base in said profile of tooth cross section is longer than in the bottom in said profile of tooth cross section, and the intersection, bottom in two waists in said profile of tooth cross section and said profile of tooth cross section is provided with the transition limit.
The technical scheme that the utility model provides; On the one hand through region of stress concentration is separated with the weld metal zone; Area of stress concentration is rounding off and is processing attitude tissue that its intensity and fatigue behaviour are greatly improved, and weld seam is away from region of stress concentration; Optimize the weld seam stress, improved the life-span of weld seam; On the other hand, serrations bar isosceles structure decrease the impact of external force to key bar and weld seam; In addition; Can also be automatically to core and then realize that three groups of key bars evenly transmit pressure and moment of torsion, increase axial stability, reduce the distortion that steel pipe takes place owing to discontinuity; Make that the weld seam between key bar and the steel pipe is stressed more reasonable, compare the bending power that has reduced the commissure with existing structure.
In technique scheme, preferably, two waists and the transition limit in said profile of tooth cross section are symmetrical set.Serrations bar isosceles structure can reduce the impact of external force to key bar and weld seam.
In technique scheme, preferably, said transition limit is an arc transition.Arc transition is separated region of stress concentration with the weld metal zone; Area of stress concentration is rounding off and is the tissue of processing attitude that its intensity and fatigue behaviour are greatly improved, and make weld seam away from region of stress concentration; Optimize the weld seam stress, improved the life-span of weld seam.
In technique scheme, preferably, the last base and/or the bottom in said profile of tooth cross section are circular arc.Going to the bottom to circular arc can make things convenient for the external key bar and manage being fixedly connected of outer wall of said profile of tooth cross section increases contact area, guarantees the bonding strength of external key bar and pipe; The upper base in profile of tooth cross section is the shape that circular arc adapts to pipe more, reduces wear.
In technique scheme, preferably, the bottom in said profile of tooth cross section is welded in the said outer wall that is in the pipe of internal layer.Welding can guarantee good bonding strength, and technology maturation is easy to operate simultaneously, can significantly improve production efficiency.
In technique scheme, preferably, the face at the place, last base in said profile of tooth cross section is the plane.The face at the upper base place in profile of tooth cross section is a non-working surface, makes the plane and not only can save material, has reduced difficulty of processing simultaneously, enhances productivity.
In technique scheme, preferably, between the waist in said profile of tooth cross section and the last base of said profile of tooth in obtuse angle.Can guarantee that like this circumference tangential force that the external key bar is received is decomposed into radial load and along the frictional force of key bar contact surface, has reduced the impact of external force to key bar and weld seam.
In technique scheme, preferably, under off working state, leave the gap between said external key bar and the said internal key bar; Contact for face between said external key bar and the said internal key bar in working order down.Gap between external key bar and the internal key bar can guarantee the flexible of multilayer pipe.In the time of in working order, the external key bar is that face contacts with the internal key bar, can reduce the wearing and tearing to internal key bar and external key bar, improves the application life of drilling rod.
In technique scheme, preferably, the pipe that is in innermost layer is a core bar, and said core bar end is provided with drilling bucket.Core bar is positioned at the innermost layer of drilling rod mechanism, and drilling bucket is installed above, can revolve and dig operation.
The utility model also provides a kind of rotary drilling rig, comprises the drilling rod in the such scheme.
The technical scheme that the utility model provides has following beneficial effect:
The key bar structure that the utility model provides; Weld seam and structural stress concentrated area are separated; Region of stress concentration and key bar are one; And machine through hot rolling and drawing with the key bar, the waist of key bar and bottom are through rounding off, the fatigue life of having improved area of stress concentration to a great extent; Because the weld seam between key bar and the steel pipe has improved the stress of weld seam away from region of stress concentration, thereby improve the fatigue life of weld seam; Simultaneously, the serrations bar is the isosceles structure, and drilling rod is decomposed into round radial load with the circumference tangential force and along frictional force of key bar contact surface etc. in the process of pressure transmission power and moment of torsion; In transfer torque and press process, radial load and frictional force realize automatically to the core function, and the transfer torque of making a concerted effort to realize of radial load and frictional force, realize that the stressed of many group key bars evenly stablize transfers pressure, and function such as increase drilling rod axial stability.
Description of drawings
Fig. 1 is the general assembly structural representation of drilling rod in the prior art;
Fig. 2 be among Fig. 1 A-A to view;
Fig. 3 is the partial structurtes sketch map among Fig. 2;
Fig. 4 is the mechanics sketch map in the structure shown in Figure 3;
Fig. 5 is the general assembly structural representation according to the said drilling rod of the utility model;
Fig. 6 be among Fig. 5 B-B to view;
Fig. 7 is the partial structurtes sketch map among Fig. 6;
Fig. 8 is the mechanical structure sketch map of structure shown in Figure 7.
Wherein, the corresponding relation between Reference numeral and the component names is among Fig. 1 to Fig. 8:
1 first pipe, 2 second pipes, 3 the 3rd pipes, 4 core bars
The internal key bar of internal key bar 7 first pipes of internal key bar 6 second pipes of 5 the 3rd pipes
The external key bar of external key bar 10 the 3rd pipe of external key bar 9 second pipes of 8 first pipes
The novel external key bar of external key bar 8a first pipe of 11 core bars
The novel external key bar of novel external key bar 10a the 3rd pipe of 9a second pipe
The novel external key bar of 11a core bar
The plane of the end points of the axis of 100 mistake pipes and the waist of external key bar
200 cross the center of circle of pipe and the plane at center, square-section
The specific embodiment
In order to make those skilled in the art understand the technical scheme of the utility model better, the utility model is done further to specify below in conjunction with accompanying drawing and specific embodiment.
A lot of details have been set forth in the following description so that make much of the utility model; But; The utility model can also adopt other to be different from other modes described here and implement, and therefore, the utility model is not limited to the restriction of following disclosed specific embodiment.
To shown in Figure 3, in the prior art, drilling rod comprises first pipe, 1, second pipe the 2, the 3rd pipe 3 and the core bar 4 of socket like Fig. 1; First pipe 1 is provided with the external key bar 8 of first pipe; The unit head that can connect rotary drilling rig, the internal key bar 7 of first pipe matches with the external key bar 9 of second pipe, and the internal key bar 6 of second pipe matches with the external key bar 10 of the 3rd pipe; The internal key bar 5 of the 3rd pipe matches with the external key bar 11 of said core bar, carries out transmission work.
But the cross section of the external key bar 10 of the external key bar 9 of the external key bar of first pipe 8, second pipe, the 3rd pipe is rectangle or type rectangle; The dual-side that promptly comprises the external key bar is vertical with at least one bottom surface, and a base of external key bar is that arc surface or two bases all are arc surface or two situation that the base all is a flat face.
No matter jackrod structure is transfer torque or transmission downforce like this, all is to pass to steel pipe earlier, passes to the key bar through steel pipe again or adds process such as present a theatrical performance as the last item on a programme.Conveying flow is: unit head-external key bar (or external key benefit plate)-steel pipe-internal key bar (a meter length or termination)-steel pipe-external key bar etc. is circulating transfer successively.
As shown in Figure 3; In the transfer torque process, produce relative motion between the different pipes under external force, when outer tube internal key (like the internal key bar 6 of second pipe and the internal key bar 5 of the 3rd pipe) and the external key of next stage pipe (like the 3rd external key bar 10 of managing and the external key bar 11 of core bar) when contacting; Internal key will pass to corresponding external key with power; Transmit so successively, will the moment of torsion of unit head be delivered to core bar, core bar passes to drilling tool with moment of torsion again and realizes punching functions.
Like Fig. 3, shown in Figure 4, the cross section of the external key bar 10 of the 3rd pipe is rectangular, and a waist 101 of square-section is parallel with the plane 200 at the center of circle of crossing pipe and center, square-section with the plane at another waist 102 places; Among the mechanical structure figure in Fig. 4; External force F along the 3rd pipe 3 circumferentially, promptly parallel with the tangent line of the external key bar 10 of the 3rd pipe, external force can not be decomposed like this; The external key of the 3rd pipe only receives the circumference tangential force, some problems below therefore occurring easily:
If the internal key bar passes to advocating along the tangential force of circumferencial direction of external key bar; When the equally distributed external key of circumference and internal key calibration are inaccurate, will have only other internal key and outer key contacts, can not realize the even transfer torque of three groups of key bars of circumference (internal key and external key);
Cause individual groups key bar or weld seam to receive bigger shock loading and overwork easily, thereby damage;
The transmittance process of this circumference discontinuity also causes the body distortion easily, and then causes body cracking or weld cracking;
This structure is not owing to there is a radial load, therefore axially easy unstability in the process of transmitting pressure and moment of torsion; Drilling rod is strict to material and manufacture process, but inevitably can produce the not matching property that differs in size.
To shown in Figure 8, the utility model provides a kind of novel jackrod structure, can solve above-mentioned the problems of the prior art and defective effectively like Fig. 5.
In order to solve the problems of the technologies described above preferably, the technical scheme that the utility model adopts is:
External key sliver transvers section structure is become profile of tooth (two waists and a base angled (greater than 90 degree) by class rectangle (being that the rectangle waist is vertical with a base); Its upper base is outlying much smaller than the bottom; Two bases all are circular arc or bottom circular arc, between bottom and the waist rounding off will be arranged); Cooperate the back welding with serrations bar base two chamfers and with steel pipe; Its internal key transfer torque face will cooperate with external key; After such welding, consider the cooperation that respectively saves drilling rod.
The drilling rod that the utility model provides; Connect by concentric a plurality of pipe boxes and to form; The inwall that is in outer field pipe between adjacent two pipes is provided with the internal key bar; The outer wall that is in the pipe of internal layer is provided with the external key bar that matches with said internal key bar, and the cross section of said external key bar is profile of tooth, and the bottom in said profile of tooth cross section is fixedly connected with the said outer wall that is in the pipe of internal layer; The last base in said profile of tooth cross section is longer than in the bottom in said profile of tooth cross section, and the intersection, bottom in two waists in said profile of tooth cross section and said profile of tooth cross section is provided with the transition limit.
Like Fig. 6, shown in Figure 7, the novel external key bar 9a of the novel external key bar 8a of first pipe, second pipe, the novel external key bar 10a of the 3rd pipe and the novel external key bar 11a of core bar are the new structure that present embodiment provides.
After adopting novel external key bar; Weld zone and area of stress concentration separate, and region of stress concentration and key bar are one, and machine through hot rolling and drawing with the key bar; The waist of key bar and bottom are through rounding off, the fatigue life of having improved area of stress concentration to a great extent.Because the weld seam between key bar and the steel pipe has improved the stress of weld seam away from region of stress concentration, thereby improve the fatigue life of weld seam.
As shown in Figure 7, the novel external key bar 9a of second pipe, its cross section is profile of tooth, and the profile of tooth cross section is the isosceles structure, and the first waist 91a and the second waist 92a are working edge, and the last base in profile of tooth cross section is longer than in the bottom in profile of tooth cross section.
In the specific embodiment, two waists in said profile of tooth cross section (comprising the first waist 91a and the second waist 92a) and transition limit 95a are symmetrical set.Serrations bar isosceles structure can reduce the impact of external force to key bar and weld seam.
Preferably, said transition limit 95a is an arc transition.Arc transition is separated region of stress concentration with the weld metal zone; Area of stress concentration is rounding off and is the tissue of processing attitude that its intensity and fatigue behaviour are greatly improved, and make weld seam away from region of stress concentration; Optimize the weld seam stress, improved the life-span of weld seam.
The bottom 94a in said profile of tooth cross section is circular arc.Going to the bottom to circular arc can make things convenient for the external key bar and manage being fixedly connected of outer wall of said profile of tooth cross section increases contact area, guarantees the bonding strength of external key bar and pipe.
The bottom 94a in said profile of tooth cross section is welded in the said outer wall that is in second pipe 2.Welding can guarantee good bonding strength, and technology maturation is easy to operate simultaneously, can significantly improve production efficiency.
Preferably, the face at the last base 93a place in said profile of tooth cross section is the plane.The face at the upper base place in profile of tooth cross section is a non-working surface, makes the plane and not only can save material, has reduced difficulty of processing simultaneously, enhances productivity.
Certainly, the last base 93a in said profile of tooth cross section also can be a circular arc, and the upper base in profile of tooth cross section is the shape that circular arc adapts to pipe more, reduces wear.
Between the last base 93a of waist in said profile of tooth cross section (comprising the first waist 91a and the second waist 92a) and said profile of tooth in obtuse angle.Can guarantee that like this circumference tangential force that the external key bar is received is decomposed into radial load and along the frictional force of key bar contact surface, has reduced the impact of external force to key bar and weld seam.
Under off working state, leave the gap between the internal key bar 7 of the novel external key bar 9a of said second pipe and said first pipe; Contact for face between the novel external key bar 9a of said second pipe and the internal key bar 7 that said first manages in working order down.Gap between external key bar and the internal key bar can guarantee the flexible of multilayer pipe.In the time of in working order, the external key bar is that face contacts with the internal key bar, can reduce the wearing and tearing to internal key bar and external key bar, improves the application life of drilling rod.
The pipe that is in innermost layer is a core bar 4, and said core bar 4 ends are provided with drilling bucket.Core bar is positioned at the innermost layer of drilling rod mechanism, and drilling bucket is installed above, can revolve and dig operation.
As shown in Figure 8, after the novel external key bar 9a that external force F acts on second pipe goes up, be decomposed into along first component F1 of contact surface and the second component F2 vertical with the direction of said first component; Wherein the first component F1 is a kind of frictional force; The second component F2 helps to provide radial load, is easy to realize automatically to the core function, realizes the stressed even of three groups of key bars; Stablize transfers pressure, increase the drilling rod axial stability.In addition external force is decomposed into the frictional force and second component, in the process of transfer torque and pressure, has relaxed impact, improve the life-span of weld seam and steel pipe steel pipe, weld seam and key bar.
The concrete operating principle of the utility model is:
Rotary digging drill power head passes to first pipe, 1, the first pipe 1 with pressure and moment of torsion through the unit head internal key and through the effect of interior external key pressure and moment of torsion is delivered to core bar 4 again, and therefore, the mode of interior external key bar transmission power is vital.For the new construction drilling rod in the transfer torque process; Inside and outside key contacts face (like the first waist 91a among Fig. 7 and the second waist 92a) is decomposed into radial load and frictional force (acting on the power parallel with contact surface on the inside and outside key contacts face) with the circumference tangential force; Suppose to begin to have only one group of key bar contact to begin transmission power; Then interior external key can until whole contacts of three groups of key bars of circumference, and then realize that three groups of key bars are evenly stressed radially producing relative motion with circumference under radial component and frictional force effect.And in transmitting pressure, the radial load and the frictional force that produce in the inside and outside key contacts transfer torque process play stable and guide effect to transmitting pressure again, have increased to transmit axial stability in the press process.Under radial load and frictional force effect, bigger shock loading is cushioned, make the stress of key bar and weld seam be optimized.
The technical scheme that the utility model provides also has following advantage:
At first, jackrod structure is more reasonable, in this arrangement works, region of stress concentration is separated with the weld metal zone, and area of stress concentration is rounding off and is processing attitude tissue that its intensity and fatigue behaviour are greatly improved; Weld seam has been optimized the weld seam stress away from region of stress concentration, improves the life-span of weld seam.
Secondly, serrations bar isosceles structure decrease the impact of external force to key bar and weld seam; Automatically to core and then realize that 3 groups of key bars evenly transmit pressure and moment of torsion; Increase axial stability; Reduce steel pipe owing to the distortion that discontinuity takes place, make weld seam stressed more reasonable (comparing the bending power that has reduced the commissure with existing structure) between key bar and the steel pipe.
Once more, strengthen area of stress concentration, optimize the weld seam stress, area of stress concentration is the machining state of key strip material by the seam organization structural transformation, and rounding off is preferably arranged, and all is greatly improved in mechanical property and fatigue behaviour.
In addition, weld seam is away from area of stress concentration, stress by original tensile, compressive, bending and bigger impact etc. become draw, pressure and less impact etc.
Simultaneously, realize, under radial load and frictional force effect, can make different pipes produce relative motion, and then adjust the relative position of different pipe ways, realize automatically to core automatically to core.
On the one hand, realize the evenly stressed of three groups of key bars, under radial load and frictional force effect, automatically to core and then realize that the power that pipe receives evenly distributes between three groups of key bars.
On the other hand, increase the drilling rod axial stability, under radial load and frictional force effect; Make a mitron internal key to closely cooperate with corresponding external key; Hold guiding tightly behind the realization transmission pressure, and then increased axial stability, reduce the body distortion that the pipe unstability produces.
Again on the one hand, improve the drilling rod life-span,, and then relax impact, the life-span of improving weld seam and steel pipe steel pipe, weld seam and key bar because the contact surface and the stress surface of interior external key have certain angle, and then can decompose impact force; Owing to 3 groups of even transfer torques of key bar and pressure, and cooperate closely diametrically, reduced the distortion and the unstability of steel pipe.
The utility model also provides a kind of rotary drilling rig, comprises the drilling rod in the above-mentioned specific embodiment.
The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (10)
1. drilling rod; It is characterized in that; Connect by concentric a plurality of pipe boxes and to form, the inwall that is in outer field pipe between adjacent two pipes is provided with the internal key bar, and the outer wall that is in the pipe of internal layer is provided with the external key bar that matches with said internal key bar; The cross section of said external key bar is profile of tooth; The bottom in said profile of tooth cross section is fixedly connected with the said outer wall that is in the pipe of internal layer, and the last base in said profile of tooth cross section is longer than in the bottom in said profile of tooth cross section, and the intersection, bottom in two waists in said profile of tooth cross section and said profile of tooth cross section is provided with the transition limit.
2. drilling rod according to claim 1 is characterized in that, two waists and the transition limit in said profile of tooth cross section are symmetrical set.
3. drilling rod according to claim 2 is characterized in that, said transition limit is an arc transition.
4. drilling rod according to claim 3 is characterized in that, the last base and/or the bottom in said profile of tooth cross section are circular arc.
5. drilling rod according to claim 4 is characterized in that, the bottom in said profile of tooth cross section is welded in the said outer wall that is in the pipe of internal layer.
6. drilling rod according to claim 3 is characterized in that, the face at the place, last base in said profile of tooth cross section is the plane.
7. drilling rod according to claim 6 is characterized in that, between the waist in said profile of tooth cross section and the last base of said profile of tooth in obtuse angle.
8. according to claim 6 or 7 described drilling rods, it is characterized in that: under off working state, leave the gap between said external key bar and the said internal key bar; Contact for face between said external key bar and the said internal key bar in working order down.
9. drilling rod according to claim 8 is characterized in that, the pipe that is in innermost layer is core bar (4), and said core bar (4) end is provided with drilling bucket.
10. a rotary drilling rig is characterized in that, comprises like each described drilling rod in the claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220102919 CN202483469U (en) | 2012-03-16 | 2012-03-16 | Drilling rod and rotary drilling rig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220102919 CN202483469U (en) | 2012-03-16 | 2012-03-16 | Drilling rod and rotary drilling rig |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202483469U true CN202483469U (en) | 2012-10-10 |
Family
ID=46957896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220102919 Expired - Fee Related CN202483469U (en) | 2012-03-16 | 2012-03-16 | Drilling rod and rotary drilling rig |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202483469U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103061681A (en) * | 2012-12-26 | 2013-04-24 | 上海中联重科桩工机械有限公司 | Drill rod for rotary drilling rig and rotary drilling rig |
| CN104389527A (en) * | 2014-10-16 | 2015-03-04 | 英联鑫博(天津)机械制造有限公司 | Center structure of excavator drill rod |
-
2012
- 2012-03-16 CN CN 201220102919 patent/CN202483469U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103061681A (en) * | 2012-12-26 | 2013-04-24 | 上海中联重科桩工机械有限公司 | Drill rod for rotary drilling rig and rotary drilling rig |
| CN104389527A (en) * | 2014-10-16 | 2015-03-04 | 英联鑫博(天津)机械制造有限公司 | Center structure of excavator drill rod |
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