CN108868617A - Circular hole drilling tool - Google Patents

Circular hole drilling tool Download PDF

Info

Publication number
CN108868617A
CN108868617A CN201810774508.5A CN201810774508A CN108868617A CN 108868617 A CN108868617 A CN 108868617A CN 201810774508 A CN201810774508 A CN 201810774508A CN 108868617 A CN108868617 A CN 108868617A
Authority
CN
China
Prior art keywords
circular hole
borehole wall
drilling tool
drill
hole drilling
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.)
Pending
Application number
CN201810774508.5A
Other languages
Chinese (zh)
Inventor
付昌鸿
张进平
邢罡
李国富
赵连海
姜卓
牛升晟
杨欣龙
赵东生
林海亮
郭彤
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.)
Beijing Huaqing Geothermal Development Group Ltd
Original Assignee
Beijing Huaqing Geothermal Development Group Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Beijing Huaqing Geothermal Development Group Ltd filed Critical Beijing Huaqing Geothermal Development Group Ltd
Priority to CN201810774508.5A priority Critical patent/CN108868617A/en
Publication of CN108868617A publication Critical patent/CN108868617A/en
Pending legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings

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)

Abstract

The present invention provides a kind of circular hole drilling tools.The circular hole drilling tool includes circular hole device and repairs drill.Wherein, the upper end of circular hole device is formed with connector, and the lower end of circular hole device, which is connected with, repairs drill.Above-mentioned connector is used for connection traversing mechanism, and circular hole device is cylindrical structure.It applies the technical scheme of the present invention, circular hole drilling tool is connected on rotating mechanism by connector, then G.I.H.It is introduced into repairing drill and can be crushed to the projective structure in the borehole wall in well, the obstruction of casing downlink is removed.Later, with the circular hole device for repairing drill downlink, the cylindrical structure of its own can be relied on, when rotated polish the superficial compaction of the borehole wall, reduce the resistance of casing downlink.In this way, by the processed drilling well of circular hole drilling tool of the present invention can easier setting of casing, it is stuck to solve the problems, such as that previous setting of casing is easy.

Description

Circular hole drilling tool
Technical field
The present invention relates to drilling equipment technical fields, in particular to a kind of circular hole drilling tool.
Background technique
Drilling technology is widely used in the fields such as petroleum, coal, underground heat, mineral exploration and water well drilling.In well drilling technology In, tripping in wall protection pipe or protective casing are important one of process, to protection wellbore construction safety, construction quality and Support Resource Quality plays the role of vital.
At this stage to pursue resource quality, drilling depth is gradually increased, and correspondingly casing tripping in length gradually increases, thus So that geological conditions becomes complexity.Since the structure of drill bit is that length is shorter and rounded, during drilling well sometimes It has and causes the irregular phenomenon of the borehole wall around lump downlink.The well drilled out in this way will result in the end of casing in down tube It is stuck by the projective structure of the borehole wall, cause down tube difficult.
Summary of the invention
The main purpose of the present invention is to provide a kind of circular hole drilling tools, to solve in the prior art in drilling well when setting of casing The casing being easy to appear it is stuck can not down tube the problem of.
To achieve the goals above, the present invention provides a kind of circular hole drilling tool, including circular hole device and drill, circular hole device are repaired Upper end be formed with connector, connector is used for connection traversing mechanism, and circular hole device is cylindrical structure, when rotated by the borehole wall Superficial compaction polishes;The lower end that drill is connected to circular hole device is repaired, repairs drill for carrying out brokenly to the projective structure in the borehole wall It is broken.
Further, the radial dimension for repairing drill is greater than or equal to the radial dimension of circular hole device.
Further, drill is repaired to connect by drill collar with circular hole device.
Further, circular hole drilling tool further includes borehole wall coping device, borehole wall coping device be connected to repair drill and circular hole device it Between, cutting edge structure is formed in the circumferential direction of borehole wall coping device, cutting edge structure extends along the vertical direction or along opposed vertical direction Inclined direction extends, and borehole wall coping device to the surface of the borehole wall for repair scraping.
Further, the radial dimension of borehole wall coping device is more than or equal to the radial dimension of circular hole device.
Further, borehole wall coping device includes connection main body and repairs wiper, and connection main body, which is connected to, repairs drill and circular hole Between device;It repairs wiper to be connected on the outer peripheral surface of connection main body, the distal end for repairing the separate connection main body of wiper forms cutting edge structure.
Further, repairing wiper is multiple, multiple periphery face interval settings for repairing wiper edge connection main body.
Further, borehole wall coping device further includes telophragma, and telophragma is connected to the middle part of connection main body, telophragma difference It is connected with multiple wiper of repairing, telophragma repairs wiper for fixation.
Further, circular hole device be it is multiple, borehole wall coping device be also it is multiple, multiple circular hole devices interval setting, adjacent two Pass through a borehole wall coping device connection between a circular hole device.
Further, when borehole wall coping device is connected between two circular hole devices, connection main body is connected to two adjacent circles Between the device of hole, repairs wiper and be also connected between two adjacent circular hole devices.
It applies the technical scheme of the present invention, circular hole drilling tool is connected on rotating mechanism by connector, then G.I.H. It is introduced into repairing drill and can be crushed to the projective structure in the borehole wall in well, the obstruction of casing downlink is removed.Later, with The circular hole device of drill downlink is repaired, the cylindrical structure of its own can be relied on, when rotated polish the superficial compaction of the borehole wall, Reduce the resistance of casing downlink.In this way, by circular hole drilling tool processed drilling well of the present invention can easier setting of casing, solve Previous setting of casing of having determined is easy stuck problem.
Other than objects, features and advantages described above, there are also other objects, features and advantages by the present invention. Below with reference to figure, the present invention is described in further detail.
Detailed description of the invention
The Figure of description for constituting a part of the invention is used to provide further understanding of the present invention, and of the invention shows Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 shows the structural schematic diagram of the embodiment one of circular hole drilling tool according to the present invention;
Fig. 2 shows the structural schematic diagrams of the embodiment two of circular hole drilling tool according to the present invention;
Fig. 3 shows the structural schematic diagram of the embodiment three of circular hole drilling tool according to the present invention.
Wherein, above-mentioned attached drawing includes the following drawings label:
10, circular hole device;11, connector;20, drill is repaired;21, drill collar;30, borehole wall coping device;31, main body is connected;32, it repairs Wiper;33, telophragma.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work It encloses.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, " Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way Term be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein.In addition, term " includes " and " tool Have " and their any deformation, it is intended that cover it is non-exclusive include, for example, containing a series of steps or units Process, method, system, product or equipment those of are not necessarily limited to be clearly listed step or unit, but may include without clear Other step or units listing to Chu or intrinsic for these process, methods, product or equipment.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
Fig. 1 shows the embodiment one of circular hole drilling tool of the invention, which includes circular hole device 10 and repair drill 20.Wherein, the upper end of circular hole device 10 is formed with connector 11, and the lower end of circular hole device 10, which is connected with, repairs drill 20.Above-mentioned connector 11 For connection traversing mechanism, circular hole device 10 is cylindrical structure.
It applies the technical scheme of the present invention, circular hole drilling tool is connected on rotating mechanism by connector 11, then lower going-into-well It is interior.It is introduced into repairing drill 20 and can be crushed to the projective structure in the borehole wall in well, the obstruction of casing downlink is removed.It Afterwards, with the circular hole device 10 for repairing 20 downlink of drill, the cylindrical structure of its own can be relied on, when rotated by the surface of the borehole wall Compacting polishes, and reduces the resistance of casing downlink.In this way, can be easier by the processed drilling well of circular hole drilling tool of the present invention It is stuck to solve the problems, such as that previous setting of casing is easy for setting of casing.
As a preferred embodiment, the radial dimension for repairing drill 20 is greater than or equal to the radial ruler of circular hole device 10 It is very little.It should be noted that circular hole device can be made when the radial dimension for repairing drill 20 is slightly larger than the radial dimension of circular hole device 10 10 downlink is also easier to, so that circular hole drilling tool is more convenient to use.Specifically, being typically chosen in construction and repairing hole The radial dimension of drill bit 20 is greater than 5 millimeters of radial dimension of circular hole device 10.
As shown in Figure 1, repairing drill 20 in the technical solution of embodiment one and being connect by drill collar 21 with circular hole device 10.
As shown in Fig. 2, the present invention also provides a kind of embodiment two of circular hole drilling tool, the technical solution and reality of embodiment two The technical solution for applying example one is compared, and difference is that circular hole drilling tool further includes borehole wall coping device 30.Borehole wall coping device 30, which is connected to, to be repaired Between drill 20 and circular hole device 10, cutting edge structure is formed in the circumferential direction of borehole wall coping device 30, cutting edge structure is along the vertical direction Extend or extend along the inclined direction in opposed vertical direction, borehole wall coping device 30 to the surface of the borehole wall for repair scraping.It is logical In normal situation, after repairing hole by repairing drill 20, the flatness on the surface of the borehole wall is also poor, by borehole wall coping device 30 to well Wall surface is repaired scrape after, the flatness of borehole wall surface can be improved well, so that circular hole device 10 can avoid more the borehole wall It is compacted polish well.In addition, borehole wall surface can also be reduced for circular hole after repairing and scraping to borehole wall surface by borehole wall coping device 30 The abrasion of device 10.
Optionally, the radial dimension of borehole wall coping device 30 is more than or equal to the radial dimension of circular hole device 10.It needs to illustrate , when the radial dimension of borehole wall coping device 30 is slightly larger than the radial dimension of circular hole device 10, can both allow borehole wall coping device 30 The good effect for improving flatness is played, circular hole device 10 can also be allowed to play good compacting and polish effect.Specifically, applying Working hour, the radial dimension for being typically chosen borehole wall coping device 30 are greater than 5 millimeters of radial dimension of circular hole device 10.
As shown in Fig. 2, as an alternative embodiment, borehole wall coping device 30 includes connection main body 31 and repairs wiper 32.Connection main body 31, which is connected to, repairs between drill 20 and circular hole device 10, repairs the outer peripheral surface that wiper 32 is connected to connection main body 31 On, the distal end for repairing the separate connection main body 31 of wiper 32 forms cutting edge structure.As other optional embodiments, cutting edge knot Structure can also be to be arranged in repair alloy components of the wiper 32 far from connection 31 distal end of main body.
As a preferred embodiment, repair wiper 32 be it is multiple, it is multiple repair wiper 32 along connection main body 31 periphery Face interval setting.The effect scraped is repaired to borehole wall surface in this way, borehole wall coping device 30 can be promoted, further improves borehole wall surface Flatness.As shown in Figure 1, more preferably, borehole wall coping device 30 further includes telophragma 33, telophragma 33 is connected to connection master The middle part of body 31, telophragma 33 are connected with multiple wiper 32 of repairing respectively.Can be born when repairing wiper 32 and repairing and scrape borehole wall surface compared with Big power repairs wiper 32 by the fixation of telophragma 33, and it is stronger can to repair fixation of the wiper 32 in connection main body 31. Optionally, it telophragma 33 and repairs wiper 32 and passes through welded connecting.
Optionally, borehole wall coping device 30 can also be integrally formed with circular hole device 10.In this embodiment, borehole wall coping device 30 protrude above to be formed from integral structure, can be the rib being arranged on integral structure.
As shown in figure 3, the present invention also provides a kind of embodiment three of circular hole drilling tool, the technical solution and reality of embodiment three The technical solution for applying example two is compared, difference be circular hole device 10 be it is multiple, borehole wall coping device 30 also be multiple, multiple circular hole devices 10 Interval is arranged, and is connected between two adjacent circular hole devices 10 by a borehole wall coping device 30.Pass through multiple borehole wall coping devices 30 Simultaneously wall more can adequately be repaired and be scraped, more sufficient compacting can also be carried out to the borehole wall by multiple circular hole devices 10 and ground It is flat, improve the operation effectiveness for the borehole wall.
As a preferred embodiment, as shown in figure 3, borehole wall coping device 30 is connected between two circular hole devices 10 When, connection main body 31 is connected between two adjacent circular hole devices 10, is repaired wiper 32 and is also connected to two adjacent circular hole devices 10 Between.In this way, connecting two adjacent circular hole devices 10 by repairing wiper 32, can be enhanced between two adjacent circular hole devices 10 Bonding strength avoids junction from being broken, and extends the service life of circular hole drilling tool.Optionally, repair wiper 32 and circular hole device 10 it Between pass through welded connecting.
Optionally, in the inventive solutions, repairing drill 20 is rock bit, repair drill 20 and drill collar 21 it Between be connected through a screw thread.
Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments It is not limited the scope of the invention up to formula and numerical value.Simultaneously, it should be appreciated that for ease of description, each portion shown in attached drawing The size divided not is to draw according to actual proportionate relationship.For technology, side known to person of ordinary skill in the relevant Method and equipment may be not discussed in detail, but in the appropriate case, and the technology, method and apparatus should be considered as authorizing explanation A part of book.In shown here and discussion all examples, any occurrence should be construed as merely illustratively, and Not by way of limitation.Therefore, the other examples of exemplary embodiment can have different values.It should be noted that:Similar label Similar terms are indicated in following attached drawing with letter, therefore, once it is defined in a certain Xiang Yi attached drawing, then subsequent attached It does not need that it is further discussed in figure.
For ease of description, spatially relative term can be used herein, as " ... on ", " ... top ", " ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy The spatial relation of sign.It should be understood that spatially relative term is intended to comprising the orientation in addition to device described in figure Except different direction in use or operation.For example, being described as if the device in attached drawing is squeezed " in other devices It will be positioned as " under other devices or construction after part or construction top " or the device of " on other devices or construction " Side " or " under other devices or construction ".Thus, exemplary term " ... top " may include " ... top " and " in ... lower section " two kinds of orientation.The device can also be positioned with other different modes and (is rotated by 90 ° or in other orientation), and And respective explanations are made to the opposite description in space used herein above.
In the description of the present invention, it is to be understood that, the noun of locality such as " front, rear, top, and bottom, left and right ", " it is laterally, vertical, Vertically, orientation or positional relationship indicated by level " and " top, bottom " etc. is normally based on orientation or position shown in the drawings and closes System, is merely for convenience of description of the present invention and simplification of the description, in the absence of explanation to the contrary, these nouns of locality do not indicate that It must have a particular orientation or be constructed and operated in a specific orientation with the device or element for implying signified, therefore cannot manage Solution is limiting the scope of the invention;The noun of locality " inside and outside " refers to inside and outside the profile relative to each component itself.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims (10)

1. a kind of circular hole drilling tool, which is characterized in that including:
The upper end of circular hole device (10), the circular hole device (10) is formed with connector (11), and the connector (11) is for connecting whirler Structure, the circular hole device (10) is cylindrical structure, when rotated to polish the superficial compaction of the borehole wall;
Drill (20) are repaired, are connected to the lower end of the circular hole device (10), described repair drill (20) are for convex in the borehole wall Structure is crushed out.
2. circular hole drilling tool according to claim 1, which is characterized in that the radial dimension for repairing drill (20) be greater than or Equal to the radial dimension of the circular hole device (10).
3. circular hole drilling tool according to claim 2, which is characterized in that described repair drill (20) pass through drill collar (21) and institute State circular hole device (10) connection.
4. circular hole drilling tool according to claim 1, which is characterized in that the circular hole drilling tool further includes borehole wall coping device (30), the borehole wall coping device (30) be connected to it is described repair between drill (20) and the circular hole device (10), the borehole wall is repaired Cutting edge structure is formed in the circumferential direction of grinder (30), the cutting edge structure extends along the vertical direction or along the relatively described vertical side Extend to inclined direction, the borehole wall coping device (30) to the surface of the borehole wall for repair scraping.
5. circular hole drilling tool according to claim 4, which is characterized in that the radial dimension of the borehole wall coping device (30) is greater than Or it is equal to the radial dimension of the circular hole device (10).
6. circular hole drilling tool according to claim 4, which is characterized in that the borehole wall coping device (30) includes:
It connects main body (31), the connection main body (31) is connected to described repair between drill (20) and the circular hole device (10);
Wiper (32) are repaired, are connected on the outer peripheral surface of connection main body (31), the separate connection for repairing wiper (32) The distal end of main body (31) forms the cutting edge structure.
7. circular hole drilling tool according to claim 6, which is characterized in that it is described repair wiper (32) be it is multiple, it is multiple described to repair Periphery face interval setting of the wiper (32) along connection main body (31).
8. circular hole drilling tool according to claim 7, which is characterized in that the borehole wall coping device (30) further includes telophragma (33), the telophragma (33) is connected to the middle part of connection main body (31), and the telophragma (33) is scraped with multiple repair respectively Part (32) is connected, and the telophragma (33) is for repairing wiper (32) described in fixation.
9. circular hole drilling tool according to claim 6, which is characterized in that the circular hole device (10) be it is multiple, the borehole wall is repaired Grinder (30) is also multiple, multiple circular hole device (10) interval settings, is passed through between the circular hole device (10) of adjacent two One borehole wall coping device (30) connection.
10. circular hole drilling tool according to claim 9, which is characterized in that the borehole wall coping device (30) is connected to two institutes When stating between circular hole device (10), connection main body (31) is connected between the circular hole device (10) of adjacent two, described to repair Wiper (32) is also connected between the circular hole device (10) of adjacent two.
CN201810774508.5A 2018-07-13 2018-07-13 Circular hole drilling tool Pending CN108868617A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810774508.5A CN108868617A (en) 2018-07-13 2018-07-13 Circular hole drilling tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810774508.5A CN108868617A (en) 2018-07-13 2018-07-13 Circular hole drilling tool

Publications (1)

Publication Number Publication Date
CN108868617A true CN108868617A (en) 2018-11-23

Family

ID=64301899

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810774508.5A Pending CN108868617A (en) 2018-07-13 2018-07-13 Circular hole drilling tool

Country Status (1)

Country Link
CN (1) CN108868617A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1044770A1 (en) * 1982-05-06 1983-09-30 Всесоюзный Ордена Трудового Красного Знамени Научно-Исследовательский Институт Буровой Техники Apparatus for working borehole walls
US4589504A (en) * 1984-07-27 1986-05-20 Diamant Boart Societe Anonyme Well bore enlarger
CN102635315A (en) * 2012-04-27 2012-08-15 中国地质大学(武汉) Joint with hole-repairing drill bit
CN202731798U (en) * 2012-07-20 2013-02-13 中国石油化工股份有限公司 Well wall trimmer
CN106168116A (en) * 2016-08-25 2016-11-30 中国石油集团渤海钻探工程有限公司 With boring micro-reaming borehole wall dressing tool and using method thereof
CN206000529U (en) * 2016-08-31 2017-03-08 北京中能万祺能源技术服务有限公司 A kind of coal bed gas well with multi-lateral horizontal well system based on straight well transformation
CN208441778U (en) * 2018-07-13 2019-01-29 北京市华清地热开发集团有限公司 Circular hole drilling tool

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1044770A1 (en) * 1982-05-06 1983-09-30 Всесоюзный Ордена Трудового Красного Знамени Научно-Исследовательский Институт Буровой Техники Apparatus for working borehole walls
US4589504A (en) * 1984-07-27 1986-05-20 Diamant Boart Societe Anonyme Well bore enlarger
CN102635315A (en) * 2012-04-27 2012-08-15 中国地质大学(武汉) Joint with hole-repairing drill bit
CN202731798U (en) * 2012-07-20 2013-02-13 中国石油化工股份有限公司 Well wall trimmer
CN106168116A (en) * 2016-08-25 2016-11-30 中国石油集团渤海钻探工程有限公司 With boring micro-reaming borehole wall dressing tool and using method thereof
CN206000529U (en) * 2016-08-31 2017-03-08 北京中能万祺能源技术服务有限公司 A kind of coal bed gas well with multi-lateral horizontal well system based on straight well transformation
CN208441778U (en) * 2018-07-13 2019-01-29 北京市华清地热开发集团有限公司 Circular hole drilling tool

Similar Documents

Publication Publication Date Title
NO20171039A1 (en) Visualization of wellbore cleaning performance
CA2966606C (en) Torque connector systems, apparatus, and methods
CN201386523Y (en) Efficient drilling, grinding and milling integrated tool for well completion of horizontal well
CN208441778U (en) Circular hole drilling tool
CN108868617A (en) Circular hole drilling tool
CN110374536A (en) A kind of casing firing milling tool
US20110203851A1 (en) T-Frac System Run in System
CN207934849U (en) Milling shoes
CN109306853B (en) Fishing device with bridging plug milling function
CN208010305U (en) A kind of down-hole equipment end face finishing combination tool
CN209195262U (en) Wellbore dressing tool and drill string
CN206233903U (en) Oil/gas Well pipe cleaning well-flushing integrated tool
CN109594917A (en) Bi-directional combination type drilling rig
CN111648736B (en) Reducing mill shoe for well repair and tubular column assembly using same
CN204200136U (en) Efficient well dressing tool
CA2978566A1 (en) Pressure perforated well casing system
CN204804790U (en) Sand -prevention screening tube
CN107091067A (en) Petroleum drilling takes oil well de-waxing apparatus
CN209875099U (en) Drifting wall scraping and horn mouth milling integrated tool
CN210714473U (en) Hydraulic rotary percussion tool for oil field drilling
CN109973038A (en) Milling shoes
CN102587840A (en) Hard formation casing windowing drill bit
CN204827313U (en) Tail pipe milling gets through and prevents inclined to one side grinder utensil with clutch formula
NL1006830C2 (en) Steerable intermediate radius tool.
CN206957619U (en) Borehole wall prosthetic device

Legal Events

Date Code Title Description
DD01 Delivery of document by public notice

Addressee: Fu Changhong

Document name: Notification of Acceptance of Patent Application

DD01 Delivery of document by public notice
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination