CN108915666A - A kind of oilfield horizontal well mixed traction device - Google Patents

A kind of oilfield horizontal well mixed traction device Download PDF

Info

Publication number
CN108915666A
CN108915666A CN201810555391.1A CN201810555391A CN108915666A CN 108915666 A CN108915666 A CN 108915666A CN 201810555391 A CN201810555391 A CN 201810555391A CN 108915666 A CN108915666 A CN 108915666A
Authority
CN
China
Prior art keywords
component
traction
tractor
shell
power
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
CN201810555391.1A
Other languages
Chinese (zh)
Inventor
王东基
苏波
陶进
江磊
谢强
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.)
China North Vehicle Research Institute
Original Assignee
China North Vehicle Research Institute
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 China North Vehicle Research Institute filed Critical China North Vehicle Research Institute
Priority to CN201810555391.1A priority Critical patent/CN108915666A/en
Publication of CN108915666A publication Critical patent/CN108915666A/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
    • E21B47/00Survey of boreholes or wells
    • 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
    • E21B23/00Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells

Abstract

The present invention relates to a kind of oilfield horizontal well mixed traction devices, including:Traction component, telescopic component and the Power Component coaxially set gradually;The telescopic component is fixedly connected with the traction component and Power Component respectively;The traction component is mobile for drawing the tractor;The telescopic component is used to drive the tractor mobile by stretching motion;The Power Component is for driving the tractor mobile.Tractor provided by the invention, provided tractive force are coefficient as a result, therefore than simple wheeled and to grab tractive force by arm-type tractor bigger due to the crawling wheel for grabbing arm rest and Power Component for being traction component;In entirely traction section crawling process, average speed than it is simple it is wheeled with grab by it is arm-type faster;The tractor of use, use flexibly can be mutually switched fast between continuous movement and compound motion both of which according to the specific operating condition in underground.

Description

A kind of oilfield horizontal well mixed traction device
Technical field
The present invention relates to oil field well robot fields, and in particular to a kind of oilfield horizontal well mixed traction device.
Background technique
Oil well needs to detect well intrinsic parameter by logger, and common vertical shaft is usually to lean on instrument self weight downward It is deep into purpose section, however as the application of the horizontal well technology with many advantages, domestic and international horizontal well quantity is increased sharply, for Horizontal well, the still method using vertical shaft by instrument self weight can not be allowed to arrive at purpose section, therefore horizontal well traction occur Logger is sent to by device by the method for external force traction.
Oilfield horizontal well tractor is there are mainly two types of typical types at present, one is wheeled, passes through power drive idler wheel Make tractor continuous moving, another kind is to grab by arm-type, grabs arm rest by two and alternately opens and closes, makes tractor intermittent movement.This Two kinds of tractor has in common that, is all that by idler wheel and will grab the pressure that arm rest applies internal surface of sleeve pipe, converts For the driving force for overcoming advance resistance, directly dragging test equipment and cable completes delivered downhole task.
The tractor of above two type, wheeled advantage are that operation is continuous, steady, and speed is fast, the disadvantage is that due to driving wheel It is small with casing wall contact area, and be to continuously contact with, determine that its tractive force is smaller, underground obstacle climbing ability is weaker;And it grabs and leans on Arm-type advantage is to grab arm rest and casing wall face contact, and tractive force is big, the disadvantage is that operation is intermittent, discontinuous, movement speed is slower, And this form is since needs are exported compared with large traction tractor while mobile, it usually needs by electrohydraulic system come real It is existing.
Summary of the invention
In order to solve the above-mentioned deficiency in the presence of the prior art, the present invention provides a kind of oilfield horizontal well and is led with hybrid Lead device.
Technical solution provided by the invention is:A kind of oilfield horizontal well mixed traction device, including:Coaxially set gradually Traction component (1), telescopic component (2) and Power Component (3);
The telescopic component (2) is fixedly connected with the traction component (1) and Power Component (3) respectively;
The traction component (1) is mobile for drawing the tractor;
The telescopic component (2) is used to drive the tractor mobile by stretching motion;
The Power Component (3) is for driving the tractor mobile.
Preferably, the Power Component (3) includes:Power shell and it is respectively arranged on the intracorporal crawling wheel group of the power shell Part (8), telescope motor and power motor;
The power shell is equipped with the hole of creeping for wheel assembly (8) stretching contact oil well casing inner wall of creeping described in confession;
The telescope motor is used to the wheel assembly of creeping (8) stretching out the power shell, and arrives to the oil well set On inside pipe wall;
The power motor drives the tractor mobile for driving described wheel assembly (8) rotation of creeping.
Preferably, the wheel assembly of creeping (8) includes:The crawling wheel of two groups of orthogonal directions arrangement, crawling wheel described in every group Number be at least 4.
Preferably, the traction component (1) includes:Traction shell and it is respectively arranged on that the traction shell is intracorporal to grab arm rest (7) and traction electric machine;
The traction shell grabs grabbing by hole by oil well casing inner wall equipped with arm rest (7) stretching is grabbed described in confession;
The traction electric machine is used to described grab arm rest (7) stretching out the traction shell, and arrives in the oil well casing On wall, it is mobile to draw the tractor.
Preferably, described grab arm rest (7) are cyclic annular setting and number is at least 4 and grabs arm rest.
Preferably, the telescopic component (2) includes:Telescopic shell and the driving motor in the telescopic shell;
The both ends of the telescopic shell respectively with the traction shell of the traction component (1) and the Power Component (3) Power shell is fixedly connected;
The driving motor drives the traction component (1) to extension for driving the telescopic shell to do stretching motion Out.
Preferably, further include:For controlling the electrically-controlled component (4) of the tractor work;
The electrically-controlled component (4) includes:Electronically controlled housing and the electrical module in the electronically controlled housing;
The electronically controlled housing is fixedly connected with the power shell of the Power Component (3);
The electrical module driving motor with the traction electric machine of the traction component (1), the telescopic component (2) respectively It is connected with the telescope motor of the Power Component (3) and power motor, for controlling the work of the tractor.
Preferably, further include:Logger (6);
The logger (6) is fixedly connected with the traction shell of the traction component (1).
Preferably, the tractor is set in oil well casing.
It preferably, further include the cable being coaxially disposed with the traction component (1), telescopic component (2) and Power Component (3) Connector (5);Described cable connector (5) one end is connect with the electronically controlled housing, and the other end is fastenedly connected with external cable.
Compared with the immediate prior art, technical solution provided by the invention is had the advantages that:
(1) mixed traction device provided by the invention, including:The traction component that coaxially sets gradually, telescopic component and dynamic Power component;The telescopic component is fixedly connected with the traction component and Power Component (3) respectively;The traction component is for leading It is mobile to draw the tractor;The telescopic component is used to drive the tractor mobile by stretching motion;The Power Component For driving the tractor mobile;There is provided tractive force is total due to the crawling wheel for grabbing arm rest and Power Component for being traction component Same-action as a result, therefore than simple wheeled and to grab tractive force by arm-type tractor bigger;In entirely traction section crawling process In, average speed than it is simple wheeled and grab by it is arm-type faster;The tractor of use, use flexibly, can according to the specific operating condition in underground, It is mutually switched fast between continuous movement and compound motion both of which.
(2) technical solution provided by the invention, using tractor, in same consumption energy, distance of creeping is taken turns than merely It formula and grabs by arm-type farther.
(3) technical solution provided by the invention, the tractor of use, in same consumption energy, obstacle climbing ability is than simple It is wheeled and grab by arm-type stronger.
(4) technical solution provided by the invention, the tractor of use, use flexibly can be according to the specific operating condition in underground, even Reforwarding is dynamic to be mutually switched fast between compound motion both of which.
Detailed description of the invention
Fig. 1 is retractor structures schematic diagram of the invention;
Fig. 2 is the continuous motor pattern schematic diagram of tractor of the invention;
Fig. 3 is the fully extended status diagram of telescopic component under tractor compound motion mode of the invention;
Fig. 4 is telescopic component fully retracted state schematic diagram under tractor compound motion mode of the invention;
Wherein, 1- traction component;2- telescopic component;3- Power Component;4- electrically-controlled component;5- cable connector;6- logging instrument Device;7- grabs arm rest;8- creeps wheel assembly.
Specific embodiment
For a better understanding of the present invention, further details of the technical solution of the present invention with reference to the accompanying drawing.
As shown in Figures 1 to 4, a kind of oilfield horizontal well mixed traction device provided in this embodiment, including:Coaxially according to Traction component 1, telescopic component 2 and the Power Component 3 of secondary setting;
The telescopic component 2 is fixedly connected with the traction component 1 and Power Component 3 respectively;
The traction component 1 is mobile for drawing the tractor;
The telescopic component 2 is used to drive the tractor mobile by stretching motion;
The Power Component 3 is for driving the tractor mobile.
Preferably, the Power Component 3 includes:Power shell and it is respectively arranged on the intracorporal wheel assembly of creeping of the power shell 8, telescope motor and power motor;
The power shell is equipped with the hole of creeping that wheel assembly 8 of creeping described in confession stretches out contact oil well casing inner wall;
The telescope motor is used to the wheel assembly 8 of creeping stretching out the power shell, and arrives to the oil well casing On inner wall;
The power motor drives the tractor mobile for driving the rotation of wheel assembly 8 of creeping.
Preferably, the wheel assembly 8 of creeping includes:The crawling wheel of two groups of orthogonal directions arrangement, crawling wheel described in every group Number is at least 4.
Preferably, the traction component 1 includes:Traction shell and be respectively arranged on the traction shell it is intracorporal grab arm rest 7 and Traction electric machine;
The traction shell grabs grabbing by hole by oil well casing inner wall equipped with the stretching of arm rest 7 is grabbed described in confession;
The traction electric machine is used to the arm rest 7 of grabbing stretching out the traction shell, and arrives to the oil well casing inner wall On, it is mobile to draw the tractor.
Preferably, described to grab that arm rest 7 is cyclic annular setting and number is at least 4 and grabs arm rest.
Preferably, the telescopic component 2 includes:Telescopic shell and the driving motor in the telescopic shell;
The both ends of the telescopic shell respectively with the traction component 1 traction shell and the Power Component 3 power Shell is fixedly connected;
The driving motor drives the traction component 1 to forward extend out for driving the telescopic shell to do stretching motion.
Preferably, further include:For controlling the electrically-controlled component 4 of the tractor work;
The electrically-controlled component 4 includes:Electronically controlled housing and the electrical module in the electronically controlled housing;
The electronically controlled housing is fixedly connected with the power shell of the Power Component 3;
The electrical module respectively with the traction electric machine of the traction component 1, the driving motor of the telescopic component 2 and institute Telescope motor and the power motor connection for stating Power Component 3, for controlling the work of the tractor.
Preferably, further include:Logger 6;
The logger 6 is fixedly connected with the traction shell of the traction component 1.
Preferably, the tractor is set in oil well casing.
It preferably, further include the cable connector 5 being coaxially disposed with the traction component 1, telescopic component 2 and Power Component 3; Described 5 one end of cable connector is connect with the electronically controlled housing, and the other end is fastenedly connected with external cable.
Specifically,
As shown in Figure 1, horizontal well provided by the invention mixed traction device, including it is traction component 1, telescopic component 2, dynamic Power component 3, electrically-controlled component 4 and cable connector 5, tractor front connect logger 6, and rear portion passes through cable connector 5 and cable It is connected.
As shown in Fig. 2, horizontal well provided by the invention mixed traction device, using continuous motor pattern;In this mode Under, traction component 1 does not start, and grabs arm rest 7 and is received in traction shell, Power Component 3 is used only and works;When work, draw first Motor driven is creeped the crawling wheel rotation of wheel assembly 8, and the crawling wheel for the wheel assembly 8 that makes to creep stretches out traction shell, and arrives to oil well On internal surface of sleeve pipe, necessary frictional force is provided for tractor movement, then by traction electric machine driving crawling wheel rotation, is driven entire The movement of tractor.
As shown in figure 3, horizontal well provided by the invention mixed traction device, using telescopic component under compound motion mode 2 fully extended states;Under compound motion mode, Power Component 3 is in running order, while traction component 1 and telescopic component 2 Also start work;When the crawling wheel for wheel assembly 8 of creeping is in microinching or stop motion because resistance is larger, telescopic component 2 It drives traction component 1 to forward extend out by initial retracted mode, grabs arm rest 7 at the same time and be flared out, when telescopic component 2 stretches out Reach capacity position when, grab arm rest 7 almost at the same open resist oil well casing inner wall.
As shown in figure 4, horizontal well provided by the invention mixed traction device, using telescopic component under compound motion mode 2 fully retracted states;State shown in Fig. 3, the driving motor work in telescopic component 2, telescopic component is by fully extended state Withdraw, the crawling wheel collective effect with wheel assembly 8 of creeping, drive the equal tractors latter half of Power Component 3 and cable together to Preceding movement;Extreme position is moved forward to latter half, completes an actuation cycle.
It after telescopic component 2 is fully retracted, grabs arm rest 7 and inwardly folds, be detached from casing wall, telescopic component 2 forward extends out again, It drives the preceding parts such as traction component 1 to travel forward, carries out subsequent cycle movement.
The above is only the embodiment of the present invention, are not intended to restrict the invention, all in the spirit and principles in the present invention Within, any modification, equivalent substitution, improvement and etc. done, be all contained in apply pending scope of the presently claimed invention it It is interior.

Claims (10)

1. a kind of oilfield horizontal well mixed traction device, which is characterized in that including:The traction component (1) that coaxially sets gradually, Telescopic component (2) and Power Component (3);
The telescopic component (2) is fixedly connected with the traction component (1) and Power Component (3) respectively;
The traction component (1) is mobile for drawing the tractor;
The telescopic component (2) is used to drive the tractor mobile by stretching motion;
The Power Component (3) is for driving the tractor mobile.
2. tractor as described in claim 1, which is characterized in that
The Power Component (3) includes:Power shell and it is respectively arranged on the intracorporal wheel assembly of creeping (8) of the power shell, flexible Motor and power motor;
The power shell is equipped with the hole of creeping for wheel assembly (8) stretching contact oil well casing inner wall of creeping described in confession;
The telescope motor is used to the wheel assembly of creeping (8) stretching out the power shell, and arrives in the oil well casing On wall;
The power motor drives the tractor mobile for driving described wheel assembly (8) rotation of creeping.
3. tractor as claimed in claim 2, which is characterized in that
The wheel assembly of creeping (8) includes:The crawling wheel of two groups of orthogonal directions arrangement, the number of crawling wheel described in every group are at least 4。
4. tractor as described in claim 1, which is characterized in that
The traction component (1) includes:Traction shell and it is respectively arranged on that the traction shell is intracorporal to grab arm rest (7) and traction is electric Machine;
The traction shell grabs grabbing by hole by oil well casing inner wall equipped with arm rest (7) stretching is grabbed described in confession;
The traction electric machine is used to described grab arm rest (7) stretching out the traction shell, and arrives on the oil well casing inner wall, It is mobile to draw the tractor.
5. tractor as claimed in claim 4, which is characterized in that
Described grab arm rest (7) are cyclic annular setting and number is at least 4 and grabs arm rest.
6. tractor as described in claim 1, which is characterized in that
The telescopic component (2) includes:Telescopic shell and the driving motor in the telescopic shell;
The both ends of the telescopic shell power with the traction shell of the traction component (1) and the Power Component (3) respectively Shell is fixedly connected;
The driving motor drives the traction component (1) to forward extend out for driving the telescopic shell to do stretching motion.
7. tractor as described in claim 1, which is characterized in that further include:For controlling the automatically controlled of the tractor work Component (4);
The electrically-controlled component (4) includes:Electronically controlled housing and the electrical module in the electronically controlled housing;
The electronically controlled housing is fixedly connected with the power shell of the Power Component (3);
The electrical module respectively with the traction electric machine of the traction component (1), the driving motor of the telescopic component (2) and institute Telescope motor and the power motor connection for stating Power Component (3), for controlling the work of the tractor.
8. tractor as described in claim 1, which is characterized in that
Further include:Logger (6);
The logger (6) is fixedly connected with the traction shell of the traction component (1).
9. tractor as described in claim 1, which is characterized in that
The tractor is set in oil well casing.
10. tractor as claimed in claim 7, which is characterized in that further include and the traction component (1), telescopic component (2) With the cable connector (5) of Power Component (3) coaxial arrangement;Described cable connector (5) one end is connect with the electronically controlled housing, another End is fastenedly connected with external cable.
CN201810555391.1A 2018-06-01 2018-06-01 A kind of oilfield horizontal well mixed traction device Pending CN108915666A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810555391.1A CN108915666A (en) 2018-06-01 2018-06-01 A kind of oilfield horizontal well mixed traction device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810555391.1A CN108915666A (en) 2018-06-01 2018-06-01 A kind of oilfield horizontal well mixed traction device

Publications (1)

Publication Number Publication Date
CN108915666A true CN108915666A (en) 2018-11-30

Family

ID=64418880

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810555391.1A Pending CN108915666A (en) 2018-06-01 2018-06-01 A kind of oilfield horizontal well mixed traction device

Country Status (1)

Country Link
CN (1) CN108915666A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114135241A (en) * 2021-11-30 2022-03-04 西安石油大学 Hybrid traction robot for horizontal well of oil field

Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201144690Y (en) * 2007-11-27 2008-11-05 中国石油天然气集团公司 Casing horizontal well logging device
US20090236101A1 (en) * 2006-02-09 2009-09-24 Nelson Keith R Force Monitoring Tractor
CN201747356U (en) * 2010-07-30 2011-02-16 西安威盛电子仪器有限公司 Motor driven wheel type downhole creeper
US20110127046A1 (en) * 2009-12-01 2011-06-02 Franz Aguirre Grip Enhanced Tractoring
CN102720477A (en) * 2012-06-05 2012-10-10 中国石油集团川庆钻探工程有限公司 Wheeled telescopic continuous creeping tractor used for horizontal well
CN102808589A (en) * 2012-08-16 2012-12-05 中国石油大学(北京) Motor-driven underground tractor for coiled tubing
CN202788704U (en) * 2012-08-16 2013-03-13 中国石油大学(北京) Electrically-controlled hydraulic-driven coiled tubing downhole tractor
CN104060960A (en) * 2014-06-25 2014-09-24 中国石油大学(北京) Self-straightening type underground drawing device
CN204252893U (en) * 2014-10-28 2015-04-08 中国石油天然气股份有限公司 A kind of telescopic downhole instrument propeller of wriggling
CN104775780A (en) * 2015-03-17 2015-07-15 中国石油天然气股份有限公司 Flexible connection type downhole instrument traction device
CN204627481U (en) * 2015-03-17 2015-09-09 中国石油天然气股份有限公司 The formula that is flexible coupling downhole instrument tractor
CN204782873U (en) * 2015-06-17 2015-11-18 中国海洋石油总公司 Through drilling fluid driven traction system
CN105952403A (en) * 2016-06-27 2016-09-21 清华大学 Oil well cable tractor
CN205977149U (en) * 2016-06-22 2017-02-22 西安石油大学 Hydraulic drive is telescopic coiled tubing tractor in turn
CN206144497U (en) * 2016-08-30 2017-05-03 西安旭丰科技发展有限责任公司 Actuating mechanism of big traction force crawl device
CN107882520A (en) * 2017-11-08 2018-04-06 清华大学 The horizontal well crawl device driven by single motor and hydraulic clutch

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090236101A1 (en) * 2006-02-09 2009-09-24 Nelson Keith R Force Monitoring Tractor
CN201144690Y (en) * 2007-11-27 2008-11-05 中国石油天然气集团公司 Casing horizontal well logging device
US20110127046A1 (en) * 2009-12-01 2011-06-02 Franz Aguirre Grip Enhanced Tractoring
CN201747356U (en) * 2010-07-30 2011-02-16 西安威盛电子仪器有限公司 Motor driven wheel type downhole creeper
CN102720477A (en) * 2012-06-05 2012-10-10 中国石油集团川庆钻探工程有限公司 Wheeled telescopic continuous creeping tractor used for horizontal well
CN102808589A (en) * 2012-08-16 2012-12-05 中国石油大学(北京) Motor-driven underground tractor for coiled tubing
CN202788704U (en) * 2012-08-16 2013-03-13 中国石油大学(北京) Electrically-controlled hydraulic-driven coiled tubing downhole tractor
CN104060960A (en) * 2014-06-25 2014-09-24 中国石油大学(北京) Self-straightening type underground drawing device
CN204252893U (en) * 2014-10-28 2015-04-08 中国石油天然气股份有限公司 A kind of telescopic downhole instrument propeller of wriggling
CN104775780A (en) * 2015-03-17 2015-07-15 中国石油天然气股份有限公司 Flexible connection type downhole instrument traction device
CN204627481U (en) * 2015-03-17 2015-09-09 中国石油天然气股份有限公司 The formula that is flexible coupling downhole instrument tractor
CN204782873U (en) * 2015-06-17 2015-11-18 中国海洋石油总公司 Through drilling fluid driven traction system
CN205977149U (en) * 2016-06-22 2017-02-22 西安石油大学 Hydraulic drive is telescopic coiled tubing tractor in turn
CN105952403A (en) * 2016-06-27 2016-09-21 清华大学 Oil well cable tractor
CN206144497U (en) * 2016-08-30 2017-05-03 西安旭丰科技发展有限责任公司 Actuating mechanism of big traction force crawl device
CN107882520A (en) * 2017-11-08 2018-04-06 清华大学 The horizontal well crawl device driven by single motor and hydraulic clutch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114135241A (en) * 2021-11-30 2022-03-04 西安石油大学 Hybrid traction robot for horizontal well of oil field

Similar Documents

Publication Publication Date Title
CN106286440B (en) A kind of control system of the telescopic downhole tractor based on hydraulic control
CN106224690B (en) A kind of pipeline detection robot
CN103972816B (en) Obstacle-crossing mechanical arm suitable for power transmission line inspection robot
CN106439386A (en) Intelligent pipe inner wall walking robot
CN106594455B (en) Robot is detected outside a kind of across the obstacle direction-adaptive pipeline of double claw type
CN206099636U (en) Multistage electronic jar of spline transmission
CN212929186U (en) Driving device of pneumatic pipeline crawling operation mechanism
CN103247975B (en) Cable injects recovery system
CN103438326A (en) Tracked self-adaptation pipeline crawler
CN105864570A (en) Steerable multifunctional petroleum pipeline robot capable of automatically adapting to pipe diameters
CN108915666A (en) A kind of oilfield horizontal well mixed traction device
CN202203599U (en) Adaptive pipeline trolley
CN201062060Y (en) Cylinder-based pneumatic wall-climbing robot
CN107380296B (en) Chemical material mixing device based on crawling robot
CN201487380U (en) Walkable vibration pipe towing device
CN106143668B (en) A kind of omnidirectional of robot pawl
CN206035414U (en) Novel oil pipe transport lifts device
CN202572395U (en) Multifunctional snake-like robot
CN111764893B (en) Coal mine underground horizontal deep hole fiber bragg grating strain sensor arrangement device and construction method thereof
CN205377186U (en) Threading machine is used in building installation
CN105922245B (en) Worm type based on torque drive stretches moving device
CN212918722U (en) Pneumatic pipeline crawling operation mechanism
CN204852604U (en) Operation car is laid to electric power pipe
CN208196793U (en) Double-station manipulator
CN103382009A (en) Aerial working platform with steering mechanism

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
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20181130