CN114482873A - Seamless steel tube for precision core drill rod - Google Patents

Seamless steel tube for precision core drill rod Download PDF

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Publication number
CN114482873A
CN114482873A CN202210165201.1A CN202210165201A CN114482873A CN 114482873 A CN114482873 A CN 114482873A CN 202210165201 A CN202210165201 A CN 202210165201A CN 114482873 A CN114482873 A CN 114482873A
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CN
China
Prior art keywords
pipe
seamless steel
wall
tube
layer
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Granted
Application number
CN202210165201.1A
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Chinese (zh)
Other versions
CN114482873B (en
Inventor
胡顺珍
孙运达
刘洪祥
胡波
李建贵
李超
肖振兴
张宏凯
焦安艳
梁慎扬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Linyi Jinzhengyang Seamless Steel Tube Co ltd
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Linyi Jinzhengyang Seamless Steel Tube Co ltd
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Priority to CN202210165201.1A priority Critical patent/CN114482873B/en
Publication of CN114482873A publication Critical patent/CN114482873A/en
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Publication of CN114482873B publication Critical patent/CN114482873B/en
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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B32B1/08—Tubular products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/18—Layered products comprising a layer of metal comprising iron or steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/042—Threaded
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/046—Couplings; joints between rod or the like and bit or between rod and rod or the like with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
    • 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
    • E21B17/1085—Wear protectors; Blast joints; Hard facing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/554—Wear resistance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2597/00—Tubular articles, e.g. hoses, pipes

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  • 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)

Abstract

The invention discloses a seamless steel pipe for a precision core drill rod, which comprises an outer pipe, wherein a wear-resistant layer is arranged on the surface of the outer pipe, an inner pipe is embedded in the inner cavity of the outer pipe, a reinforcing ring and a pouring filler are arranged in the middle of the outer wall of the inner pipe, a reinforcing rib is arranged in the pouring filler, a limiting block, a groove and screw teeth are arranged at the port of the inner pipe, a butt joint sleeve is arranged on the surface of the port of the inner pipe through the screw teeth, and a lug is arranged on the inner wall of the butt joint sleeve. This kind of accurate core drill is seamless steel pipe for drilling rod, be used for constituting the double-deck additional strengthening of seamless steel pipe, it is low to avoid traditional individual layer intensity, break easily and lead to the problem that the operation was shelved, improve inner tube structural strength alone, it constitutes the outer tube with the wearing layer to be equipped with the seamless steel layer of carbon manganese simultaneously, be used for improving outer tube outer wall wear resistance, be used for improving inner tube explosion-proof ability and structural strength, improve outer tube compressive property, for solidifying between inner tube and the outer tube, improve whole pipeline structural strength, avoid external corrosion of strengthening rib to soften simultaneously, deformation and cracked scheduling problem.

Description

Seamless steel tube for precision core drill rod
Technical Field
The invention relates to the technical field of steel pipes, in particular to a seamless steel pipe for a precision core drill rod.
Background
At present, in the geological drilling process, coring is a process of sampling rocks in a drilled stratum for solving the geological condition of the stratum; the seamless steel pipe and the drill rod are mainly used for obtaining rock samples in petroleum and geological exploration drilling and play a role in oil gas and geological exploration, and the conventional seamless steel pipe has a plurality of defects in practical application, such as: after long-time use, the whole length of strengthening rib is longer, and easy deformation leads to the structural strength of strengthening rib to weaken, and the strengthening rib can form the joint with the junction of body, and under the high fatigue use, the stress of joint department is great easy fracture. Therefore, the seamless steel pipe for the precision core drill rod is improved.
Disclosure of Invention
In order to solve the technical problems, the invention provides the following technical scheme:
the invention relates to a seamless steel tube for a precision core drill rod, which comprises an outer tube, wherein a wear-resistant layer is arranged on the surface of the outer tube, an inner tube is embedded in the inner cavity of the outer tube, a reinforcing ring and a pouring filler are arranged in the middle of the outer wall of the inner tube, a reinforcing rib is arranged in the pouring filler, a limiting block, a groove and threads are arranged at the port of the inner tube, a butt joint sleeve is arranged on the port of the inner tube through the threads, a convex block is arranged on the inner wall of the butt joint sleeve, and the tube wall of the inner tube consists of a corrosion-resistant coating, an alloy steel layer and a carbon-manganese seamless steel layer.
According to a preferable technical scheme of the invention, the outer wall and the inner wall of the butt joint sleeve are both provided with threads, the butt joint sleeve is in clamping connection with the grooves on the ports of the inner pipe and the outer pipe through a bump, the butt joint sleeve is in threaded connection with the inner pipe and the outer pipe through the threads, and glue is coated between the threads.
As a preferable technical scheme of the invention, the corrosion-resistant coating is positioned on the pipe wall of the inner cavity of the inner pipe, and the surface of the corrosion-resistant coating is subjected to smoothing treatment.
As a preferred technical scheme of the invention, the alloy steel layer is embedded and installed in the center of the inner pipe wall, the carbon-manganese seamless steel layer is positioned outside the inner pipe wall, and the thickness ratio of the alloy steel layer to the carbon-manganese seamless steel layer to the corrosion-resistant coating is 2.5: 2: 1.
as a preferred technical solution of the present invention, the reinforcing rings are sleeved on the outer wall of the inner tube, the reinforcing rings are arranged in a plurality of groups, each group is arranged in an equidistant array, and the reinforcing rings assist the outer tube to be sleeved and fixed on the inner tube.
As a preferred technical scheme of the invention, the reinforcing ribs are designed in a plurality of groups of cylinders, the reinforcing ribs transversely penetrate through the centers of the side edges of the reinforcing rings, the reinforcing ribs are arranged in an annular array by taking the inner pipe as a central shaft, and the pouring filler is molten steel and is filled between the reinforcing rings for cooling and solidification.
As a preferred technical scheme of the invention, the outer pipe consists of a carbon-manganese seamless steel layer and a wear-resistant layer, wherein the carbon-manganese seamless steel layer is a main body knot of the pipe wall of the outer pipe.
The invention has the beneficial effects that:
1. the seamless steel pipe for the precise core drill rod is provided with the outer pipe and the inner pipe which work together to form a double-layer reinforced structure of the seamless steel pipe, so that the problem of operation shelving caused by low strength of a traditional single layer and easy breakage is solved, the corrosion-resistant coating, the alloy steel layer and the carbon-manganese seamless steel layer are arranged to work together to independently improve the structural strength of the inner pipe, and the carbon-manganese seamless steel layer and the wear-resistant layer are arranged to form the outer pipe to improve the wear resistance of the outer wall of the outer pipe;
2. this kind of seamless steel pipe is used to accurate core drill drilling rod, through being equipped with strengthening rib through connection beaded finish, establish between inner tube and outer tube by beaded finish cover, not only be used for improving inner tube explosion-proof ability and structural strength, also improve outer tube compressive property simultaneously, the cooperation is pour the filler and is solidified and improve the beaded finish, and between inner tube and the outer tube joint strength, and for solidifying between inner tube and the outer tube, improve whole pipeline structural strength, avoid external corrosion of strengthening rib to soften simultaneously, warp and cracked scheduling problem, be used for assisting between the multiunit pipeline to connect fixedly through being equipped with the butt joint cover, simple structure is reasonable, high durability and convenient use, the current problem has effectively been solved, and the practical value is higher.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is an exploded view of a seamless steel tube for a drill rod of a precision core drill according to the present invention;
FIG. 2 is a three-dimensional structure diagram of a seamless steel tube for a precision core drill rod according to the present invention;
FIG. 3 is a cross-sectional view of a seamless steel pipe for a precision core drill rod according to the present invention;
FIG. 4 is a structural view of a reinforcing ring of the seamless steel pipe for a precision core drill rod according to the present invention.
In the figure: 1. an outer tube; 2. an inner tube; 3. butting sleeves; 4. a limiting block; 5. a groove; 6. screw teeth; 7. a reinforcement ring; 8. pouring a filler; 9. a bump; 10. a corrosion-resistant plating layer; 11. an alloy steel layer; 12. a carbon manganese seamless steel layer; 13. a wear layer; 14. and (5) reinforcing ribs.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example (b): as shown in figures 1-4, the seamless steel tube for the precision core drill rod comprises an outer tube 1, wherein a wear-resistant layer 13 is arranged on the surface of the outer tube 1, an inner tube 2 is embedded in the inner cavity of the outer tube 1, a reinforcing ring 7 and a pouring filler 8 are arranged in the middle of the outer wall of the inner tube 2, a reinforcing rib 14 is arranged inside the pouring filler 8, a limiting block 4, a groove 5 and a screw thread 6 are arranged at the port of the inner tube 2, a butt joint sleeve 3 is arranged on the surface of the port of the inner tube 2 through the screw thread 6, a bump 9 is arranged on the inner wall of the butt joint sleeve 3, and the wall of the inner tube 2 is composed of a corrosion-resistant coating 10, an alloy steel layer 11 and a carbon-manganese seamless steel layer 12.
Wherein, 3 outer walls of butt joint sleeve and inner wall all are equipped with thread 6, and butt joint sleeve 3 passes through lug 9 and is connected with 5 blocks of recess on 2 and the 1 port of outer tube of inner tube, and butt joint sleeve 3 passes through thread 6 and inner tube 2 and 1 threaded connection of outer tube, and the coating has glue between the thread 6 for it is fixed to connect between the supplementary multiunit pipeline.
Wherein, the corrosion-resistant coating 10 is positioned on the inner cavity pipe wall of the inner pipe 2, and the surface of the corrosion-resistant coating 10 is subjected to smoothing treatment.
Wherein, alloy steel layer 11 inlays to establish and installs at 2 pipe wall centers in the inner tube, and carbon manganese seamless steel layer 12 is located the 2 pipe wall outsides of inner tube, and alloy steel layer 11, carbon manganese seamless steel layer 12 and corrosion-resistant cladding material 10's thickness proportion is 2.5: 2: 1, the structural strength of the inner pipe is improved independently.
Wherein, 7 covers of beaded finish are established and are installed on 2 outer walls of inner tube, and beaded finish 7 is equidistant array installation between a plurality of groups and every group, and 1 cover of beaded finish 7 supplementary outer tube is established and is fixed on inner tube 2 for improve inner tube explosion-proof ability and structural strength.
The reinforcing ribs 14 are in a plurality of groups of cylindrical designs, the reinforcing ribs 14 transversely penetrate through the centers of the side edges of the reinforcing rings 7, the reinforcing ribs 14 are installed in an annular array mode by taking the inner pipe 2 as a center shaft, and the pouring filler 8 is molten steel and filled between the reinforcing rings 7 to be cooled and solidified, so that the compression resistance of the outer pipe is improved.
The outer pipe 1 is composed of a carbon-manganese seamless steel layer 12 and a wear-resistant layer 13, and the carbon-manganese seamless steel layer 12 is a pipe wall main body knot of the outer pipe 1.
The working principle is as follows: the outer pipe 1 and the inner pipe 2 work together to form a double-layer reinforced structure of the seamless steel pipe, so that the problem that the traditional single-layer structure is low in strength and easy to break to cause work placement is solved, the corrosion-resistant coating 10, the alloy steel layer 11 and the carbon-manganese seamless steel layer 12 work together to independently improve the structural strength of the inner pipe 2, and meanwhile, the carbon-manganese seamless steel layer 12 and the wear-resistant layer 13 are arranged to form the outer pipe 1 and are used for improving the wear-resistant performance of the outer wall of the outer pipe 1; through being equipped with 14 through connection beaded finish 7 of strengthening rib, establish between inner tube 2 and outer tube 1 by 7 covers of beaded finish, not only be used for improving inner tube 2 explosion-proof ability and structural strength, also improve outer tube 1 compressive property simultaneously, the cooperation is pour filler 8 and is solidified and improve beaded finish 7, with inner tube 2 and outer tube 1 between joint strength, and for solidifying between inner tube 2 and the outer tube 1, improve whole pipeline structural strength, avoid 14 external corrosion of strengthening rib to soften simultaneously, warp and cracked scheduling problem, be used for assisting to connect fixedly between the multiunit pipeline through being equipped with butt joint cover 3, and is simple in structure reasonable, high durability and convenient use, the current problem has effectively been solved, and the practical value is higher.
Finally, it should be noted that: in the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. The utility model provides a precision is got core and is bored seamless steel pipe for drilling rod, includes outer tube (1), its characterized in that, outer tube (1) surface is equipped with wearing layer (13), inlay in outer tube (1) inner chamber and establish and install inner tube (2), inner tube (2) outer wall mid-mounting has beaded finish (7) and pours filler (8), pour inside strengthening rib (14) that is equipped with of filler (8), inner tube (2) port department is equipped with stopper (4), recess (5) and thread (6), butt joint cover (3) are installed through thread (6) on inner tube (2) port surface, install lug (9) on butt joint cover (3) inner wall, inner tube (2) pipe wall comprises corrosion-resistant cladding material (10), alloy steel layer (11) and carbon manganese seamless steel layer (12).
2. The seamless steel pipe for the precision core drill rod according to claim 1, wherein the outer wall and the inner wall of the butt sleeve (3) are provided with threads (6), the butt sleeve (3) is in clamping connection with the grooves (5) on the ports of the inner pipe (2) and the outer pipe (1) through a convex block (9), the butt sleeve (3) is in threaded connection with the inner pipe (2) and the outer pipe (1) through the threads (6), and glue is coated between the threads (6).
3. The seamless steel pipe for the drill rod of the precision core drill as claimed in claim 1, wherein the corrosion-resistant coating (10) is provided on the inner wall of the inner bore of the inner pipe (2), and the surface of the corrosion-resistant coating (10) is subjected to a smoothing treatment.
4. The seamless steel pipe for the precision core drill rod according to claim 1, wherein the alloy steel layer (11) is embedded and installed in the center of the pipe wall of the inner pipe (2), the carbon-manganese seamless steel layer (12) is positioned outside the pipe wall of the inner pipe (2), and the thickness ratio of the alloy steel layer (11), the carbon-manganese seamless steel layer (12) and the corrosion-resistant coating (10) is 2.5: 2: 1.
5. the seamless steel tube for the precision core drill rod according to claim 1, wherein the reinforcing rings (7) are sleeved on the outer wall of the inner tube (2), the reinforcing rings (7) are arranged in a plurality of groups and are arranged in an equidistant array, and the reinforcing rings (7) assist the outer tube (1) to be sleeved and fixed on the inner tube (2).
6. The seamless steel pipe for the precision core drill rod of claim 1 is characterized in that the reinforcing ribs (14) are designed in a plurality of groups of cylinders, the reinforcing ribs (14) transversely penetrate through the centers of the side edges of the reinforcing rings (7), the reinforcing ribs (14) are arranged in an annular array by taking the inner pipe (2) as a center, and the casting filler (8) is molten steel and filled between the reinforcing rings (7) for cooling and solidification.
7. The seamless steel pipe for the precision core drill rod according to claim 1, characterized in that the outer pipe (1) is composed of a carbon-manganese seamless steel layer (12) and a wear-resistant layer (13), and the carbon-manganese seamless steel layer (12) is a pipe wall main body structure of the outer pipe (1).
CN202210165201.1A 2022-02-23 2022-02-23 Seamless steel pipe for precision core drill rod Active CN114482873B (en)

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CN114482873B CN114482873B (en) 2022-09-23

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Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2086749C1 (en) * 1990-05-31 1997-08-10 Диаман Боар Стратаби С.А. Dual coring tube for inclined drilling
RU2190747C1 (en) * 2001-05-23 2002-10-10 Федеральное государственное унитарное предприятие Специальное конструкторское бюро по геологоразведочной технике "Геотехника" Twin drill stem
CN203628237U (en) * 2013-11-22 2014-06-04 中国石油大学(华东) Anti-corrosion seamless steel tube
CN205956570U (en) * 2016-08-28 2017-02-15 湖北捷丰科技股份有限公司 Low seamless steel pipe for medium pressure boiler
CN206409763U (en) * 2017-01-06 2017-08-15 张家港嘉园钢铁制品有限公司 A kind of double-deck seamless steel pipe
CN206723627U (en) * 2017-04-20 2017-12-08 江苏宏亿钢管有限公司 A kind of accurate solid drawn tube
CN110905424A (en) * 2019-12-25 2020-03-24 陈建汉 Geological exploration double-layer drill rod for negative pressure coring and matched drilling tool thereof
CN210510554U (en) * 2019-05-17 2020-05-12 诸暨市沃驰机械科技有限公司 Accurate cold-drawn seamless steel pipe dispels heat by force
CN211853064U (en) * 2020-03-04 2020-11-03 浙江正业特钢有限公司 Novel stainless steel seamless steel pipe
CN212130416U (en) * 2020-05-09 2020-12-11 丽水景诚科技有限公司 Drill rod device for petroleum geological exploration
CN213018131U (en) * 2020-08-17 2021-04-20 无锡鑫常钢管有限责任公司 Fatigue-resistant high-pressure-resistant small-diameter seamless high-pressure stainless steel oil pipe
CN214274751U (en) * 2020-09-25 2021-09-24 四川天英星航空科技有限公司 Double-layer seamless steel pipe
CN215334951U (en) * 2021-06-07 2021-12-28 安徽科润管业有限公司 Accurate high resistance to compression seamless steel pipe

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2086749C1 (en) * 1990-05-31 1997-08-10 Диаман Боар Стратаби С.А. Dual coring tube for inclined drilling
RU2190747C1 (en) * 2001-05-23 2002-10-10 Федеральное государственное унитарное предприятие Специальное конструкторское бюро по геологоразведочной технике "Геотехника" Twin drill stem
CN203628237U (en) * 2013-11-22 2014-06-04 中国石油大学(华东) Anti-corrosion seamless steel tube
CN205956570U (en) * 2016-08-28 2017-02-15 湖北捷丰科技股份有限公司 Low seamless steel pipe for medium pressure boiler
CN206409763U (en) * 2017-01-06 2017-08-15 张家港嘉园钢铁制品有限公司 A kind of double-deck seamless steel pipe
CN206723627U (en) * 2017-04-20 2017-12-08 江苏宏亿钢管有限公司 A kind of accurate solid drawn tube
CN210510554U (en) * 2019-05-17 2020-05-12 诸暨市沃驰机械科技有限公司 Accurate cold-drawn seamless steel pipe dispels heat by force
CN110905424A (en) * 2019-12-25 2020-03-24 陈建汉 Geological exploration double-layer drill rod for negative pressure coring and matched drilling tool thereof
CN211853064U (en) * 2020-03-04 2020-11-03 浙江正业特钢有限公司 Novel stainless steel seamless steel pipe
CN212130416U (en) * 2020-05-09 2020-12-11 丽水景诚科技有限公司 Drill rod device for petroleum geological exploration
CN213018131U (en) * 2020-08-17 2021-04-20 无锡鑫常钢管有限责任公司 Fatigue-resistant high-pressure-resistant small-diameter seamless high-pressure stainless steel oil pipe
CN214274751U (en) * 2020-09-25 2021-09-24 四川天英星航空科技有限公司 Double-layer seamless steel pipe
CN215334951U (en) * 2021-06-07 2021-12-28 安徽科润管业有限公司 Accurate high resistance to compression seamless steel pipe

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