CN109869098A - A kind of segmented protective device for drilling rod - Google Patents
A kind of segmented protective device for drilling rod Download PDFInfo
- Publication number
- CN109869098A CN109869098A CN201910094512.1A CN201910094512A CN109869098A CN 109869098 A CN109869098 A CN 109869098A CN 201910094512 A CN201910094512 A CN 201910094512A CN 109869098 A CN109869098 A CN 109869098A
- Authority
- CN
- China
- Prior art keywords
- cylinder
- protective cover
- connecting rod
- parts
- annular groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000001681 protective effect Effects 0.000 title claims abstract description 117
- 238000005553 drilling Methods 0.000 title claims abstract description 37
- 230000004224 protection Effects 0.000 claims abstract description 71
- 239000002689 soil Substances 0.000 claims abstract description 70
- 239000010985 leather Substances 0.000 claims abstract description 49
- 230000007246 mechanism Effects 0.000 claims abstract description 23
- 238000001035 drying Methods 0.000 claims description 34
- 239000000463 material Substances 0.000 claims description 20
- 239000010902 straw Substances 0.000 claims description 18
- 239000000843 powder Substances 0.000 claims description 16
- 239000003963 antioxidant agent Substances 0.000 claims description 12
- 230000003078 antioxidant effect Effects 0.000 claims description 12
- 239000004800 polyvinyl chloride Substances 0.000 claims description 12
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 12
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 9
- 229920000459 Nitrile rubber Polymers 0.000 claims description 8
- 239000002808 molecular sieve Substances 0.000 claims description 7
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 7
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 5
- 229920001596 poly (chlorostyrenes) Polymers 0.000 claims description 4
- 150000001336 alkenes Chemical class 0.000 claims description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N 1,4a-dimethyl-7-propan-2-yl-2,3,4,4b,5,6,10,10a-octahydrophenanthrene-1-carboxylic acid Chemical compound C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
- 230000006835 compression Effects 0.000 abstract description 14
- 238000007906 compression Methods 0.000 abstract description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 230000003139 buffering effect Effects 0.000 description 7
- 239000012752 auxiliary agent Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000004391 petroleum recovery Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 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
- E21B12/00—Accessories for drilling tools
-
- 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
-
- 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
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
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)
- Earth Drilling (AREA)
- Catching Or Destruction (AREA)
Abstract
A kind of segmented protective device for drilling rod, including cylinder are provided with multiple annular grooves on cylinder, and cylinder is divided into multiple rigid portions, is provided with flexible part in annular groove by annular groove；Flexible part includes leather layer, multiple fixed rings are provided at the top and bottom of leather layer, the nut for further including multiple bolts and matching with bolt, multiple first spheres and multiple second spheres are filled in the annular filled cavity, the diameter of the first sphere is 8~15 times of the diameter of the second sphere；Further include multiple protection mechanisms, at least one bolt and at least one nut are placed in protection mechanism.The compression strength of cylinder of the present invention everywhere is different; by the way that the lower flexible part of cost is added, the production cost of cylinder is not only reduced, the transport of cylinder, storing step are also more easier; and cylinder itself has the ability that can adapt to a variety of soil environments, improves the universality of protection sleeve.
Description
Technical field
The present invention relates to field of petroleum machinery, and in particular to a kind of segmented protective device for drilling rod.
Background technique
Drilling rod is a kind of steel pipe of tail portion setting screw thread, and the screw thread is for connecting drilling machine landscape apparatus and being located at drilling well bottom end
Bore mill equipment or bottom outlet device.As important one of oil exploration equipment, drilling mud can be transported to drill bit by drilling rod, and
Bottom outlet device is improved, reduces or rotated together with drill bit.
Since drilling rod needs to protrude into underground, the design of drilling rod has to be able to bear the immense pressure from soil.
In order to improve the service life of drilling rod, process costs are reduced, avoid drilling rod from damaging in use since soil squeezes, now
Have in technology and is usually equipped with protection sleeve in the conveying section outer sheath of drilling rod.
But traditional drilling rod protects whole, sleeve to be made of the higher material of intensity, and not only protective case is arranged in this way
It is at high cost, it in turn results in process for petroleum recovery increased costs, can not also adapt to a variety of different soil environments, i.e. universality is poor,
It can not disperse unexpected increased soil extruding force well, cause protection sleeve surface stress to concentrate, to damage protective case
Cylinder, increases the maintenance frequency of sleeve.
Summary of the invention
The present invention provides a kind of segmented protective devices for drilling rod, solve traditional drilling rod protection sleeve cost
Height, not easy to repair, universality is poor and can not disperse protection sleeve rapid wear caused by unexpected increased soil extruding force well
Bad problem.
The present invention is achieved through the following technical solutions:
A kind of segmented protective device for drilling rod, including cylinder are provided with multiple annular grooves, institute on the cylinder
The bus of the bus for stating annular groove and cylinder is coaxial, and cylinder is divided into multiple rigid portions by annular groove, sets in annular groove
It is equipped with flexible part, along the direction at the middle part of the rigid portion to flexible part, the thickness of rigid portion is gradually reduced, extremely along cylinder upper end
The height in the direction of cylinder lower end, the flexible part is gradually reduced；Flexible part includes leather layer, and the top of the leather layer is placed
In the notch for being located at annular groove upper surface, the bottom of leather layer is placed in the notch of annular groove lower surface, skin
Multiple fixed rings are provided at the top and bottom of leather layer, further include multiple bolts and the nut that matches with bolt, it is described
The size of bolt and the size of fixed ring match, by bolt, nut, fixed ring collective effect, leather layer is detachable
Ground is mounted in the notch of annular groove, and leather layer and annular groove is made to constitute closed annular filled cavity, the annular filling
It is intracavitary to be filled with multiple first spheres and multiple second spheres, the diameter of first sphere be the diameter of the second sphere 8~
15 times；It further include multiple protection mechanisms, the protection mechanism includes two support plates being mounted on cylinder, in the support plate
First connecting rod is installed, further includes the first protective cover and the second protective cover, is provided with card convex on first protective cover, second
It is provided with the card slot to match with card convex on protective cover, is provided with the second connecting rod on the first protective cover and the second protective cover,
The internal diameter of second connecting rod is not less than the outer diameter of first connecting rod, is provided with bullet in first connecting rod and the second connecting rod
Spring, the spring one end are fixed on the bottom of first connecting rod, and the other end is fixed on the bottom of the second connecting rod, the first protective cover
Closed protection chamber is constituted under the resilient force of spring with the second protective cover, is placed at least one spiral shell in the protection chamber
Bolt and at least one nut.
In the prior art, drilling rod protects whole, sleeve to be made of the higher material of same intensity, and setting in this way exists
Many problems.Firstly, the extruding force of soil increases with protection sleeve depth in the earth formation, it is thus evident that protection sleeve leans on
The extruding force of soil suffered by the side at nearly top is less than soil extruding force suffered by the side close to bottom, the prior art
The compression strength of middle protection sleeve everywhere is identical and is equal to the compression strength that its bottom must satisfy, and not only increases protective case
Manufacturing cost, while increase production, transport and storage and etc. difficulty, and then improve process for petroleum recovery cost.
Secondly as mining environment is various, in some mining environments, soil extruding force is smaller, and soil property is loose, antecedent soil moisture, one
Soil extruding force is larger in a little mining environments, and soil property is close, ground moistening, in production, in order to meet worst exploitation ring
Border demand, usually to the protection intensity of sleeve, corrosion resistance it is more demanding, also increase manufacturing cost, otherwise protect sleeve
Adaptability will be excessively poor；Again, in recovery process, due to pouring into for drilling mud, soil moves around, protects sleeve
The soil extruding force that surface is born will generate variation, in fact it could happen that the surface stress raisers for protecting sleeve cause protective case
Cylinder damage, increases the maintenance frequency of protection sleeve.
In order to solve the above-mentioned problems in the prior art, the present invention provides a kind of segmenteds to protect sleeve.Specifically
Ground is protected and is provided with multiple annular grooves on sleeve, and cylinder is divided into multiple rigid portions by multiple annular grooves, and rigid portion has
Higher compression strength and deformation is hardly generated, the leather layer being arranged in annular groove, the first sphere, the second sphere are common
Flexible part is constituted, the compression strength of flexible part is low, will generate deformation after being squeezed to slow down extruding of the soil to sleeve
Power, it is preferable that the diameter of the first sphere is 8~15 times of the diameter of the second sphere, and the first sphere mainly undertakes buffer function,
Volume is larger, and the materials such as rubber can be used and be made, and the second sphere primarily serves the effect for filling gap between each first sphere,
Volume is smaller, and the materials such as discarded plant such as stalk can be used and be made.By above-mentioned setting, cylinder is arranged alternately from top to bottom
For rigid portion and flexible part.Preferably, the middle part of rigid portion is raised slightly outwards, for guiding soil to flexible part, preferably
Ground, along cylinder upper end to the direction of cylinder lower end, the height of flexible part is gradually reduced, i.e. spacing between two rigid portions subtracts
Small, the reason of setting is that soil extruding force is very small in cylinder upper end in this way, uses rigid portion without large area at this time, therefore
Flexible part area is larger, the first sphere and second filled between the deformation and leather layer and annular groove of leather layer generation
Sphere can satisfy lesser soil extruding force；However, with the increase of depth of soil, soil extruding force that cylinder body bottom receives
It is increasing, it needs that closeer rigid portion is arranged at this time, flexible part is only used for being adaptively adjusted local stress at this time, avoids certain
Stress concentration in one rigid portion causes sleeve to damage.By above-mentioned setting, the compression strength of cylinder everywhere is different, passes through addition
The lower flexible part of cost not only reduces the production cost of cylinder, and the transport of cylinder, storing step are more easier, and cylinder
Itself have the ability that can adapt to a variety of soil environments, improves the universality of protection sleeve；Moreover, in recovery process
In, due to pouring into for drilling mud and when generating mobile, the raised diversion design of rigid portion can guide part soil soil
To flexible part, flexible part passes through the first sphere of deformation and the filling of leather layer, the second sphere buffering again, finally avoids rigidity
Excessive local stress is generated in portion, is effectively protected protection sleeve；In addition, passing through reasonable design flexible part and rigid portion
Size, not only increase the utilization rate of flexible part, reduce protection sleeve overall cost, while also meeting needed for each section
Compression strength has universal promotional value.
In order to be securely fixed in leather layer in rigid portion, slot is provided in the upper and lower surfaces of annular groove
Mouthful, notch is used for accommodating portion leather layer, fixed ring is provided on the leather layer in notch, between fixed ring and leather layer
It further include multiple bolts and the nut that matches with bolt using connection types such as bonding, mountings, screw bolt passes notch
The screw hole in outside, fixed ring, the screw hole on the inside of notch, and fixed bolt by nut, to realize leather layer and rigidity
Portion is detachably connected.
But since soil has certain humidity, acid-base property and extruding force, exposed nut and part spiral shell in the soil
Bolt is easy to be corroded and be squeezed and damage, and causes normally take out bolt, and then can not be just when taking out protection sleeve
Leather layer often is taken out from rigid portion, replaces the first sphere and the second sphere.In order to solve this problem, it is additionally provided on cylinder
Multiple protection mechanisms, protection mechanism include the first protective cover and the second protective cover, the side of the first protective cover and the second protective cover
Card convex and card slot are respectively arranged with for realizing the clamping of the first protective cover and the second protective cover, when the first protective cover and second are protected
Closed protective chamber is constituted when shield is connected together, protection is intracavitary can to accommodate at least one set of screw bolt and nut, it is preferable that can hold
Receive three groups of screw bolt and nut.The second connecting rod, setting in the second connecting rod are respectively and fixedly provided on first protective cover and the second protective cover
There is first connecting rod, first connecting rod can stretch in the second connecting rod, and the one end of first connecting rod far from the second connecting rod is solid
Determine on the supporting plate, support plate is removably mounted on the side of rigid portion, is provided in first connecting rod and the second connecting rod
Spring, spring one end are connected to first connecting rod bottom, and the other end is connected to the second connecting rod bottom, and spring is in compression always
State.The principle of protection mechanism is, when needing to install or remove bolt, nut, stirs the first protective cover to support rod direction
With the second protective cover, after the completion of installation or removal, under the impetus of spring power, the first protective cover and the second protective cover
Move toward one another, final card convex enters card slot, and the first protective cover and the second protective cover constitute closed protection chamber, not only effectively every
Soil absolutely, prevents acid and alkali corrosion bolt, the nut in soil, while having certain compression strength, avoid soil to bolt,
The extruding of nut, meanwhile, the protection mechanism is easy to operate, and it is easy to maintenance, it will not be opened in the soil because of extruding.
Further, the upper surface of first protective cover and the second protective cover is respectively and fixedly provided with a point soil portion, described point of soil portion
Cross section be right angled triangle, when the first protective cover and the second protective cover, which are constituted, protects chamber, the rectangular side in two points of soil portions
Face paste is combined.The contact area for dividing the setting of soil block to increase the first protective cover and the second protective cover and soil, reduces
Pressure, while soil being shunted to the first protective cover and the second protective cover two sides, reduce the first protective cover and the second protective cover
The soil extruding force being subject to also increases the hard of the first protective cover and the second protective cover in addition, divide soil block sheet as entity structure
Degree.When installing or removing bolt, nut, operator can push the first protective cover and second to protect by stirring point soil block
Shield is mobile to support plate, so that the operation is more convenient.
Further, the protection is intracavitary is provided with drying box, and the drying box is engraved structure, is placed in drying box
5A type molecular sieve.5A type molecular sieve in drying box can play certain desiccation, be suitable for the higher soil of moisture, into
The degree that one step has delayed bolt, nut to be corroded.
Further, drying box bottom is provided at least one mounting groove, and size and the bolt of the mounting groove match,
Drying box is placed on the upper surface of nut.Mounting groove enables to drying box to be fixed on bolt and is placed in nut upper surface,
It is more bonded screw bolt and nut, further increases drying effect.Meanwhile when there is multiple bolts, drying box bottom can also be connected
Each bolt plays the role of consolidating integrally-built.
Further, along cylinder upper end to the direction of cylinder lower end, the diameter of the flexible part is gradually reduced.Due to first
There are gaps between sphere and the second sphere, and under gravity, the second sphere is easy to be deposited in the lower section of flexible part, to cut
Buffering effect above weak flexible part, in order to solve this problem, the diameter of flexible part is along cylinder upper end to the side of cylinder lower end
To being gradually reduced, i.e., the distance between leather layer and body centre are gradually reduced, and by above-mentioned adjustment, the first sphere is not easy to accumulate
In flexible part bottom, the second sphere can be reasonably distributed, and will not all be deposited in flexible part bottom.
Further, by weight, the material of first sphere includes following components: 10-20 parts of nitrile rubber, polychlorostyrene
5-8 parts of ethylene, 30-40 parts of straw powder, 2-5 parts of silane coupling agent, 1-2 parts of odium stearate, 1-2 parts of antioxidant.Due to the first ball
The main effect of body is buffering, it is therefore desirable to have certain elasticity.Said components are using nitrile rubber and straw powder as mainly
Material, and it is aided with a small amount of polyvinyl chloride and necessary auxiliary agent, the first sphere of formation can not only meet the elastic need of buffering
It asks, this discarded plant fiber of stalk is simultaneously effective utilized, avoids environmental pollution brought by crop straw burning, realizes
Waste utilization, meanwhile, stalk has good degradability also can be fine even if there is a small amount of first sphere to enter in soil
Ground degradation, protects environment.
Further, by weight, the material of second sphere includes following components: straw powder 30-40, polyvinyl chloride
10-15 parts, 1-4 parts of silane coupling agent, 0.5-1 parts of antioxidant.The main function of second sphere is filling, therefore to aeroelastic requirements
Not high, material is aided with a small amount of polyvinyl chloride and auxiliary agent mainly based on straw powder, and similarly, above-mentioned design is reasonably real
Show the waste utilization of stalk, while there is good degradability, it is environmentally friendly.
As a preferred solution of the present invention, a kind of segmented protective device for drilling rod, including cylinder, the cylinder
Multiple annular grooves are provided on body, the bus of the annular groove and the bus of cylinder are coaxial, and annular groove separates cylinder
For multiple rigid portions, it is provided with flexible part in annular groove, along the direction at the middle part of the rigid portion to flexible part, rigid portion
Thickness is gradually reduced, and along cylinder upper end to the direction of cylinder lower end, the height of the flexible part is gradually reduced；Flexible part includes skin
Layer is removed from office, is placed in the notch of annular groove upper surface at the top of the leather layer, the bottom of leather layer, which is placed on, to be located at
In the notch of annular groove lower surface, at the top and bottom of leather layer on be provided with multiple fixed rings, further include multiple bolts, with
And the nut to match with bolt, the size of the bolt and the size of fixed ring match, and pass through bolt, nut, fixed ring
Collective effect, leather layer is removably mounted in the notch of annular groove, leather layer and annular groove is constituted and closes
Annular filled cavity, it is described annular filled cavity in be filled with multiple first spheres and multiple second spheres；It further include multiple protections
Mechanism, the protection mechanism include two support plates being mounted on cylinder, are equipped with first connecting rod in the support plate, also
Including the first protective cover and the second protective cover, it is provided with card convex on first protective cover, is provided with and blocks on the second protective cover
Be provided with the second connecting rod on the convex card slot to match, the first protective cover and the second protective cover, second connecting rod it is interior
Diameter is not less than the outer diameter of first connecting rod, is provided with spring in first connecting rod and the second connecting rod, the spring one end is fixed
In the bottom of first connecting rod, the other end is fixed on the bottom of the second connecting rod, and the first protective cover and the second protective cover are in spring
Resilient force under constitute closed protection chamber, be placed at least one bolt and at least one nut in the protection chamber；
The material of first sphere includes following components: 10-20 parts of nitrile rubber, 5-8 parts of polyvinyl chloride, and 30-40 parts of straw powder, silicon
2-5 parts of alkane coupling agent, 1-2 parts of odium stearate, 1-2 parts of antioxidant；The material of second sphere includes following components: straw powder
30-40,10-15 parts of polyvinyl chloride, 1-4 parts of silane coupling agent, 0.5-1 parts of antioxidant.
Further, the upper surface of first protective cover and the second protective cover is respectively and fixedly provided with a point soil portion, described point of soil portion
Cross section be right angled triangle, when the first protective cover and the second protective cover, which are constituted, protects chamber, the rectangular side in two points of soil portions
Face paste is combined.
Further, the protection is intracavitary is provided with drying box, and the drying box is engraved structure, is placed in drying box
5A type molecular sieve；Drying box bottom is provided at least one mounting groove, and size and the bolt of the mounting groove match, drying box
It is placed on the upper surface of nut.
Compared with prior art, the present invention having the following advantages and benefits:
1, the compression strength of cylinder of the present invention everywhere is different, by the way that the lower flexible part of cost is added, not only reduces cylinder
The production cost of body, the transport of cylinder, storing step are also more easier, and cylinder itself has can adapt to a variety of soil environments
Ability, improve protection sleeve universality；Moreover, in recovery process, soil due to pouring into for drilling mud and
When generating mobile, the raised diversion design of rigid portion can be guided part soil to flexible part, and flexible part passes through leather layer again
Deformation and filling the first sphere, the second sphere buffering, finally avoid generating excessive local stress in rigid portion, effectively
Ground protects protection sleeve；In addition, passing through the size of reasonable design flexible part and rigid portion, the benefit of flexible part is not only increased
With rate, protection sleeve overall cost is reduced, while compression strength needed for also meeting each section, there is universal promotion price
Value；
2, the design of protection mechanism of the present invention has not completely cut off soil only effectively, prevent acid and alkali corrosion bolt in soil,
Nut, while there is certain compression strength, extruding of the soil to bolt, nut is avoided, meanwhile, the protection mechanism operation side
Just, easy to maintenance, divide the application of soil block so that protection mechanism will not be opened in the soil because of extruding；
3, the first sphere in the present invention is using nitrile rubber and straw powder as main material, and is aided with a small amount of polychlorostyrene second
Alkene and necessary auxiliary agent, the first sphere of formation can not only meet the elastic demand of buffering, stalk are simultaneously effective utilized
This discarded plant fiber avoids environmental pollution brought by crop straw burning, realizes waste utilization, meanwhile, stalk has
Good degradability can also degrade well even if there is a small amount of first sphere to enter in soil, protect environment；Similarly,
Second sphere is aided with a small amount of polyvinyl chloride and auxiliary agent mainly based on straw powder, while realizing that it fills function, mentions
The high degradation capability of the utilization rate of stalk and the second sphere.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is partial cutaway schematic of the invention；
Fig. 3 is the structural schematic diagram of protection mechanism in the specific embodiment of the invention.
Appended drawing reference and corresponding parts title:
1- cylinder, 2- flexible part, 3- protection mechanism, 4- leather layer, the first sphere of 5-, the second sphere of 6-, 7- support plate, 8-
First connecting rod, the second connecting rod of 9-, the first protective cover of 10-, 11- points of soil portions, the second protective cover of 12-, 13- drying box, 14- bullet
Spring, 15- fixed ring, 16- bolt, 17- nut, 18- drilling rod.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation for explaining only the invention, are not made
For limitation of the invention.
Embodiment 1
As shown in Figure 1 to Figure 3, a kind of segmented protective device for drilling rod of the present invention, including cylinder 1, the cylinder 1
On be provided with multiple annular grooves, the bus of the bus and cylinder 1 of the annular groove is coaxial, and annular groove separates cylinder 1
For multiple rigid portions, it is provided with flexible part 2 in annular groove, along the middle part of the rigid portion to the direction of flexible part 2, rigid portion
Thickness be gradually reduced, along the direction of 1 upper end of cylinder to 1 lower end of cylinder, the height of flexible part 2 is gradually reduced；Flexible part 2 includes
Leather layer 4, the top of leather layer 4 are placed in the notch of annular groove upper surface, and the bottom of leather layer 4, which is placed on, to be located at
In the notch of annular groove lower surface, it further includes multiple bolts that leather layer, which is provided with multiple fixed rings 15 on 4 top and bottom,
16 and the nut 17 that matches with bolt 16, the size of the size and fixed ring 15 of bolt 16 match, by bolt 16,
Leather layer 4 is removably mounted in the notch of annular groove by the collective effect of nut 17, fixed ring 15, make leather layer 4 with
Annular groove constitutes closed annular filled cavity, is filled with multiple first spheres 5 and multiple second balls in the annular filled cavity
Body 6, the diameter of first sphere 5 are 8~15 times of the diameter of the second sphere 6；It further include multiple protection mechanisms 3, the guarantor
Protecting mechanism 3 includes two support plates 7 being mounted on cylinder 1, is equipped with first connecting rod 8 in the support plate 7, further includes the
One protective cover 10 and the second protective cover 12 are provided with card convex on first protective cover 10, be provided on the second protective cover 12 with
The second connecting rod 9, second connection are provided on the card slot that card convex matches, the first protective cover 10 and the second protective cover 12
The internal diameter of bar 9 is not less than the outer diameter of first connecting rod 8, is provided with spring 14, spring in first connecting rod 8 and the second connecting rod 9
14 one end are fixed on the bottom of first connecting rod 8, and the other end is fixed on the bottom of the second connecting rod 9, the first protective cover 10 and
Two protective covers 12 constitute closed protection chamber under the resilient force of spring 14, are placed at least one spiral shell in the protection chamber
Bolt 16 and at least one nut 17；The upper surface of first protective cover 10 and the second protective cover 12 is respectively and fixedly provided with a point soil portion 11,
The cross section in described point of soil portion 11 is right angled triangle, when the first protective cover 10 and the second protective cover 12 composition protection chamber, two
The rectangle sides in a point of soil portion 11 fit together；The protection is intracavitary to be provided with drying box 13, and the drying box 13 is hollow out
Structure is placed with 5A type molecular sieve in drying box 13；13 bottom of drying box is provided at least one mounting groove, the mounting groove
Size matches with bolt 16, and drying box 13 is placed on the upper surface of nut 17；Along the direction of 1 upper end of cylinder to 1 lower end of cylinder,
The diameter of the flexible part 2 is gradually reduced；By weight, the material of first sphere 5 includes following components: nitrile rubber 10
Part, 5 parts of polyvinyl chloride, 40 parts of straw powder, 2 parts of silane coupling agent, 1 part of odium stearate, 1 part of antioxidant；By weight, described
The material of two spheres 6 includes following components: straw powder 40, and 10 parts of polyvinyl chloride, 4 parts of silane coupling agent, 1 part of antioxidant.
The compression strength of cylinder 1 of the present invention everywhere is different, by the way that the lower flexible part of cost is added, not only reduces cylinder
1 production cost, the transport of cylinder 1, storing step are also more easier, and cylinder 1 has in itself can adapt to a variety of soil rings
The ability in border improves the universality of protection sleeve；Moreover, in recovery process, soil is poured into due to drilling mud
And when generating mobile, the raised diversion design of rigid portion can guide part soil to flexible part 2, and flexible part 2 passes through skin again
The first sphere, the second sphere buffering for removing from office deformation and the filling of layer 4, finally avoid generating excessive part in rigid portion and answer
Power is effectively protected protection sleeve；In addition, passing through the size of reasonable design flexible part 2 and rigid portion, not only increase soft
Property portion 2 utilization rate, reduce protection sleeve overall cost, while compression strength needed for also meeting each section, have universal
Promotional value.
Embodiment 2
As shown in Figure 1 to Figure 3, a kind of segmented protective device for drilling rod, including cylinder 1 are arranged on the cylinder 1
There are multiple annular grooves, the bus of the bus and cylinder 1 of the annular groove is coaxial, and cylinder 1 is divided into multiple by annular groove
Rigid portion is provided with flexible part 2 in annular groove, along the middle part of the rigid portion to the direction of flexible part 2, the thickness of rigid portion
It is gradually reduced, along the direction of 1 upper end of cylinder to 1 lower end of cylinder, the height of the flexible part 2 is gradually reduced；Flexible part 2 includes skin
Layer 4 is removed from office, the top of leather layer 4 is placed in the notch of annular groove upper surface, and the bottom of leather layer 4 is placed on positioned at ring
In the notch of connected in star lower surface, it further includes multiple bolts that leather layer, which is provided with multiple fixed rings 15 on 4 top and bottom,
16 and the nut 17 that matches with bolt 16, the size of the size and fixed ring 15 of the bolt 16 match, pass through bolt
16, nut 17,15 collective effect of fixed ring, leather layer 4 is removably mounted in the notch of annular groove, leather layer 4 is made
Closed annular filled cavity is constituted with annular groove, is filled with multiple first spheres 5 and multiple second in the annular filled cavity
Sphere 6, the diameter of first sphere 5 are 8~15 times of the diameter of the second sphere 6；It further include multiple protection mechanisms 3, it is described
Protection mechanism 3 includes two support plates 7 being mounted on cylinder 1, is equipped with first connecting rod 8 in the support plate 7, further includes
First protective cover 10 and the second protective cover 12 are provided with card convex on first protective cover 10, are provided on the second protective cover 12
The second connecting rod 9 is provided on the card slot to match with card convex, the first protective cover 10 and the second protective cover 12, described second connects
The internal diameter of extension bar 9 is not less than the outer diameter of first connecting rod 8, is provided with spring 14, institute in first connecting rod 8 and the second connecting rod 9
The bottom that 14 one end of spring is fixed on first connecting rod 8 is stated, the other end is fixed on the bottom of the second connecting rod 9, the first protective cover
10 and second protective cover 12 closed protection chamber is constituted under the resilient force of spring 14, be placed at least in the protection chamber
One bolt 16 and at least one nut 17；The material of first sphere 5 includes following components: 20 parts of nitrile rubber, polychlorostyrene
8 parts of ethylene, 30 parts of straw powder, 5 parts of silane coupling agent, 2 parts of odium stearate, 2 parts of antioxidant；The material packet of second sphere 6
Include following components: straw powder 30,15 parts of polyvinyl chloride, 1 part of silane coupling agent, 0.5 part of antioxidant；First protective cover, 10 He
The upper surface of second protective cover 12 is respectively and fixedly provided with a point soil portion 11, and the cross section in point soil portion 11 is right angled triangle, when the first protection
When cover 10 and the second protective cover 12 constitute protection chamber, the rectangle sides in two points of soil portions 11 fit together；The protection is intracavitary
It is provided with drying box 13, the drying box 13 is engraved structure, is placed with 5A type molecular sieve in drying box 13；13 bottom of drying box
It is provided at least one mounting groove, size and the bolt 16 of the mounting groove match, and drying box 13 is placed on the upper of nut 17
Surface.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of segmented protective device for drilling rod, including cylinder (1), which is characterized in that be provided on the cylinder (1)
The bus of multiple annular grooves, the bus and cylinder (1) of the annular groove is coaxial, and cylinder (1) is divided into more by annular groove
A rigid portion is provided with flexible part (2) in annular groove, along the direction of the middle part of the rigid portion to flexible part (2), rigid portion
Thickness be gradually reduced, along cylinder (1) upper end to the direction of cylinder (1) lower end, the height of the flexible part (2) is gradually reduced；
Flexible part (2) includes leather layer (4), is placed in the notch of annular groove upper surface at the top of the leather layer (4), skin
The bottom of leather layer (4) is placed in the notch of annular groove lower surface, is provided on leather layer (4) top and bottom more
A fixed ring (15), further includes multiple bolts (16) and the nut (17) to match with bolt (16), the bolt (16)
Size and the size of fixed ring (15) match, by bolt (16), nut (17), fixed ring (15) collective effect, by skin
Leather layer (4) is removably mounted in the notch of annular groove, so that leather layer (4) and annular groove is constituted closed annular and is filled
Chamber, it is described annular filled cavity in be filled with multiple first spheres (5) and multiple second spheres (6), first sphere (5) it is straight
Diameter is 8~15 times of the diameter of the second sphere (6)；It further include multiple protection mechanisms (3), the protection mechanism (3) includes two
The support plate (7) being mounted on cylinder (1) is equipped with first connecting rod (8) on the support plate (7), further includes the first protection
(10) and the second protective cover (12) are covered, is provided with card convex on first protective cover (10), the second protective cover is provided on (12)
It is provided with the second connecting rod (9) on the card slot to match with card convex, the first protective cover (10) and the second protective cover (12), it is described
The internal diameter of second connecting rod (9) is not less than the outer diameter of first connecting rod (8), sets in first connecting rod (8) and the second connecting rod (9)
It is equipped with spring (14), described spring (14) one end is fixed on the bottom of first connecting rod (8), and the other end is fixed on the second connecting rod
(9) bottom, the first protective cover (10) and the second protective cover (12) constitute closed guarantor under the resilient force of spring (14)
Chamber is protected, is placed at least one bolt (16) and at least one nut (17) in the protection chamber.
2. a kind of segmented protective device for drilling rod according to claim 1, which is characterized in that first protection
The upper surface of cover (10) and the second protective cover (12) is respectively and fixedly provided with a point soil portion (11), and the cross section of described point of soil portion (11) is right angle
Triangle, when the first protective cover (10) and the second protective cover (12) constitute protection chamber, the rectangle sides of two points of soil portions (11)
It fits together.
3. a kind of segmented protective device for drilling rod according to claim 1, which is characterized in that the protection is intracavitary
It is provided with drying box (13), the drying box (13) is engraved structure, is placed with 5A type molecular sieve in drying box (13).
4. a kind of segmented protective device for drilling rod according to claim 3, which is characterized in that drying box (13) bottom
Portion is provided at least one mounting groove, and size and the bolt (16) of the mounting groove match, and drying box (13) is placed on nut
(17) upper surface.
5. a kind of segmented protective device for drilling rod according to claim 1, which is characterized in that along cylinder (1)
It holds to the direction of cylinder (1) lower end, the diameter of the flexible part (2) is gradually reduced.
6. a kind of segmented protective device for drilling rod according to claim 1, which is characterized in that by weight, institute
The material for stating the first sphere (5) includes following components: 10-20 parts of nitrile rubber, 5-8 parts of polyvinyl chloride, and 30-40 parts of straw powder,
2-5 parts of silane coupling agent, 1-2 parts of odium stearate, 1-2 parts of antioxidant.
7. a kind of segmented protective device for drilling rod according to claim 1, which is characterized in that by weight, institute
The material for stating the second sphere (6) includes following components: straw powder 30-40, and 10-15 parts of polyvinyl chloride, 1-4 parts of silane coupling agent,
0.5-1 parts of antioxidant.
8. a kind of segmented protective device for drilling rod, including cylinder (1), which is characterized in that be provided on the cylinder (1)
The bus of multiple annular grooves, the bus and cylinder (1) of the annular groove is coaxial, and cylinder (1) is divided into more by annular groove
A rigid portion is provided with flexible part (2) in annular groove, along the direction of the middle part of the rigid portion to flexible part (2), rigid portion
Thickness be gradually reduced, along cylinder (1) upper end to the direction of cylinder (1) lower end, the height of the flexible part (2) is gradually reduced；
Flexible part (2) includes leather layer (4), is placed in the notch of annular groove upper surface at the top of the leather layer (4), skin
The bottom of leather layer (4) is placed in the notch of annular groove lower surface, is provided on leather layer (4) top and bottom more
A fixed ring (15), further includes multiple bolts (16) and the nut (17) to match with bolt (16), the bolt (16)
Size and the size of fixed ring (15) match, by bolt (16), nut (17), fixed ring (15) collective effect, by skin
Leather layer (4) is removably mounted in the notch of annular groove, so that leather layer (4) and annular groove is constituted closed annular and is filled
Chamber, it is described annular filled cavity in be filled with multiple first spheres (5) and multiple second spheres (6), first sphere (5) it is straight
Diameter is 8~15 times of the diameter of the second sphere (6)；It further include multiple protection mechanisms (3), the protection mechanism (3) includes two
The support plate (7) being mounted on cylinder (1) is equipped with first connecting rod (8) on the support plate (7), further includes the first protection
(10) and the second protective cover (12) are covered, is provided with card convex on first protective cover (10), the second protective cover is provided on (12)
It is provided with the second connecting rod (9) on the card slot to match with card convex, the first protective cover (10) and the second protective cover (12), it is described
The internal diameter of second connecting rod (9) is not less than the outer diameter of first connecting rod (8), sets in first connecting rod (8) and the second connecting rod (9)
It is equipped with spring (14), described spring (14) one end is fixed on the bottom of first connecting rod (8), and the other end is fixed on the second connecting rod
(9) bottom, the first protective cover (10) and the second protective cover (12) constitute closed guarantor under the resilient force of spring (14)
Chamber is protected, is placed at least one bolt (16) and at least one nut (17) in the protection chamber；The material of first sphere (5)
Material includes following components: 10-20 parts of nitrile rubber, 5-8 parts of polyvinyl chloride, and 30-40 parts of straw powder, 2-5 parts of silane coupling agent, firmly
1-2 parts of resin acid sodium, 1-2 parts of antioxidant；The material of second sphere (6) includes following components: straw powder 30-40, polychlorostyrene second
10-15 parts of alkene, 1-4 parts of silane coupling agent, 0.5-1 parts of antioxidant.
9. a kind of segmented protective device for drilling rod according to claim 8, which is characterized in that first protection
The upper surface of cover (10) and the second protective cover (12) is respectively and fixedly provided with a point soil portion (11), and the cross section of described point of soil portion (11) is right angle
Triangle, when the first protective cover (10) and the second protective cover (12) constitute protection chamber, the rectangle sides of two points of soil portions (11)
It fits together.
10. a kind of segmented protective device for drilling rod according to claim 9, which is characterized in that the protection chamber
It is inside provided with drying box (13), the drying box (13) is engraved structure, is placed with 5A type molecular sieve in drying box (13)；It is dry
Box (13) bottom is provided at least one mounting groove, and size and the bolt (16) of the mounting groove match, and drying box (13) is put
Set the upper surface in nut (17).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNPCT/CN2018/074702 | 2018-01-31 | ||
| PCT/CN2018/074702 WO2019148358A1 (en) | 2018-01-31 | 2018-01-31 | Segmented protection device for drill pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109869098A true CN109869098A (en) | 2019-06-11 |
| CN109869098B CN109869098B (en) | 2020-09-22 |
Family
ID=66918443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910094512.1A Expired - Fee Related CN109869098B (en) | 2018-01-31 | 2019-01-31 | Sectional type protection device for drill rod |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109869098B (en) |
| WO (1) | WO2019148358A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110578467A (en) * | 2019-10-18 | 2019-12-17 | 重庆工程职业技术学院 | Coal mining sampling device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201705214U (en) * | 2010-03-30 | 2011-01-12 | 河南理工大学 | Multi-arris hot-melt coating wearable drilling rod |
| CN102213080A (en) * | 2011-06-15 | 2011-10-12 | 吴宣成 | Drill rod connecting hand |
| CN102305029A (en) * | 2011-08-12 | 2012-01-04 | 中国地质大学（武汉） | Insulating pup joint used for underground mine drilling and manufacture method thereof |
| CN202946045U (en) * | 2012-11-22 | 2013-05-22 | 天津开元达海洋石油工程发展有限公司 | Heavy weight drill pipe |
| CN103874822A (en) * | 2011-10-04 | 2014-06-18 | 瓦卢莱克钻孔产品法国公司 | Drill stem element and corresponding drill pipe |
| CN106048687A (en) * | 2016-08-02 | 2016-10-26 | 中国地质科学院勘探技术研究所 | Preparation method of wear-resistant and anti-corrosion aluminum alloy drill rod surface strengthening layers |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU848567A1 (en) * | 1979-12-20 | 1981-07-23 | Всесоюзный Научно-Исследовательскийинститут Безопасности Труда B Горно-Рудной Промышленности | Drilling rod |
| RU2494219C1 (en) * | 2012-05-21 | 2013-09-27 | Николай Митрофанович Панин | Drill rod |
| CN203114194U (en) * | 2013-03-19 | 2013-08-07 | 长安大学 | Drill stem protector used for absorbing drill stem impact vibration |
| CN105370223B (en) * | 2015-12-10 | 2017-06-23 | 吉林大学 | A kind of drill rod thread thread protector |
| CN205605144U (en) * | 2016-04-22 | 2016-09-28 | 南阳师范学院 | Prevent fender bracket of oil exploration machine drill pole skew |
-
2018
- 2018-01-31 WO PCT/CN2018/074702 patent/WO2019148358A1/en active Application Filing
-
2019
- 2019-01-31 CN CN201910094512.1A patent/CN109869098B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201705214U (en) * | 2010-03-30 | 2011-01-12 | 河南理工大学 | Multi-arris hot-melt coating wearable drilling rod |
| CN102213080A (en) * | 2011-06-15 | 2011-10-12 | 吴宣成 | Drill rod connecting hand |
| CN102305029A (en) * | 2011-08-12 | 2012-01-04 | 中国地质大学（武汉） | Insulating pup joint used for underground mine drilling and manufacture method thereof |
| CN103874822A (en) * | 2011-10-04 | 2014-06-18 | 瓦卢莱克钻孔产品法国公司 | Drill stem element and corresponding drill pipe |
| CN202946045U (en) * | 2012-11-22 | 2013-05-22 | 天津开元达海洋石油工程发展有限公司 | Heavy weight drill pipe |
| CN106048687A (en) * | 2016-08-02 | 2016-10-26 | 中国地质科学院勘探技术研究所 | Preparation method of wear-resistant and anti-corrosion aluminum alloy drill rod surface strengthening layers |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110578467A (en) * | 2019-10-18 | 2019-12-17 | 重庆工程职业技术学院 | Coal mining sampling device |
| CN110578467B (en) * | 2019-10-18 | 2024-04-05 | 重庆工程职业技术学院 | Coal exploitation sampling device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109869098B (en) | 2020-09-22 |
| WO2019148358A1 (en) | 2019-08-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109869098A (en) | A kind of segmented protective device for drilling rod | |
| CN106238132A (en) | A kind of ore reduction screening installation | |
| CN105889465B (en) | A kind of stable heat dissipation and the decelerator shell of anticollision | |
| CN214248734U (en) | Protection device for natural gas pipeline for transporting western gas and east gas | |
| CN103590749B (en) | Drilling bucket and rotary drilling rig | |
| CN208878723U (en) | A kind of rubber-metal composite globe mill inner wall of rotary drum liner plate | |
| CN207229905U (en) | A kind of water conservancy construction pipeline protection device | |
| CN109882090A (en) | A kind of ancillary equipment excavated for petroleum | |
| CN2895704Y (en) | Opening-closing type shock-damping centralizer | |
| CN106383041B (en) | A kind of axial loading device | |
| CN208886263U (en) | A kind of concrete pump damping device | |
| CN210949669U (en) | Mine electromechanical device's shock attenuation protection mechanism | |
| CN109339781B (en) | Blowout-preventing dust-removing device for coal mine drilling | |
| CN206854288U (en) | A kind of pipeline crushing reducing mechanism | |
| CN208294449U (en) | A kind of double outer diameter tool joints | |
| CN105781414B (en) | The upper spider transverse-moving mechanism of integrated drilling machine is repaired in a kind of soil sample | |
| CN108844771A (en) | A kind of Novel spiral sampling head | |
| CN205592400U (en) | Hydraulic smashing pick | |
| CN218118395U (en) | Light elastic coupling with long service life | |
| CN213752077U (en) | Medium-voltage chemical corrosion resistant power cable for coastal zone traffic communication | |
| CN114017456B (en) | High-efficient damping device of shield machine | |
| CN208174193U (en) | A kind of sleeve through walls with shock-absorbing function for electric power cable arrangement | |
| CN203540621U (en) | Shock absorption device of hammer crusher and hammer crusher | |
| CN204139241U (en) | Loader scraper bowl | |
| CN212898341U (en) | Mining rig adapter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200922 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |