CN110642170B - Portable column type heavy object dragging device, method and application - Google Patents

Portable column type heavy object dragging device, method and application Download PDF

Info

Publication number
CN110642170B
CN110642170B CN201911070230.4A CN201911070230A CN110642170B CN 110642170 B CN110642170 B CN 110642170B CN 201911070230 A CN201911070230 A CN 201911070230A CN 110642170 B CN110642170 B CN 110642170B
Authority
CN
China
Prior art keywords
winch
weight
anchoring
portable column
supporting part
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.)
Active
Application number
CN201911070230.4A
Other languages
Chinese (zh)
Other versions
CN110642170A (en
Inventor
张国安
张军
袁小云
李亮亮
程军利
周芳
雷雄
赵选
贾宏鹏
冯爱平
李卓立
刘红艳
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 National Petroleum Corp
CNPC Chuanqing Drilling Engineering Co Ltd
Original Assignee
China National Petroleum Corp
CNPC Chuanqing Drilling Engineering Co 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 China National Petroleum Corp, CNPC Chuanqing Drilling Engineering Co Ltd filed Critical China National Petroleum Corp
Priority to CN201911070230.4A priority Critical patent/CN110642170B/en
Publication of CN110642170A publication Critical patent/CN110642170A/en
Application granted granted Critical
Publication of CN110642170B publication Critical patent/CN110642170B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28Other constructional details
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/02Driving gear
    • B66D1/04Driving gear manually operated
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D2700/00Capstans, winches or hoists
    • B66D2700/02Hoists or accessories for hoists
    • B66D2700/026Pulleys, sheaves, pulley blocks or their mounting

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)

Abstract

The invention belongs to the technical field of engineering machinery, and particularly relates to a portable column type heavy object dragging device, a portable column type heavy object dragging method and application. The invention is formed by organically combining an anchoring supporting part, a fixed seat fixedly connected to the upper surface of the anchoring supporting part and a traction piece connected to the upper surface of the fixed seat and used for being connected with a weight and being pulled. When needed, an anchor ring and a movable pulley are added in the invention, so that the invention can drag heavy objects with larger weight. The invention has simple structure, saves time and labor when dragging heavy objects, and is stable and safe.

Description

Portable column type heavy object dragging device, method and application
Technical Field
The invention belongs to the technical field of engineering machinery, and particularly relates to a portable column type heavy object dragging device, a portable column type heavy object dragging method and application.
Background
In the production and transportation processes of some industries in the prior art, in order to drag some devices or other weights to a predetermined position, a great deal of manpower or large machinery is often required to be used for dragging, so that the weights can be moved to the predetermined position. However, in the process of carrying, the risks of injuries such as slipping, collision, accidental striking of objects and the like often occur to the heavy objects, and the labor intensity is high and the working efficiency is low.
Disclosure of Invention
The invention provides a portable column type heavy object dragging device, a portable column type heavy object dragging method and application, and aims to provide a device capable of safely, laborsaving, stably and efficiently dragging a heavy object to a preset position instead of manpower and a heavy object dragging method.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a portable column type heavy object dragging device comprises
The supporting part is anchored and fixed on the base,
the fixed seat is fixedly connected to the upper surface of the anchoring supporting part;
the traction piece is connected to the upper surface of the fixing seat and used for being connected with and pulled by the weight.
The fixing seat adopts a fixing flange plate which is horizontally connected to the upper surface of the anchoring supporting part; the anchoring supporting part is of a columnar structure.
The device also comprises an anchor ring and a movable pulley; the anchor ring is connected to the fixed seat, and the movable pulley is connected to the traction piece.
The traction piece is a winch, a steel wire rope is connected to the winch, and a hook is connected to the front end of the steel wire rope.
The winch is a hand winch, and a winch crank is connected to the hand winch; the traction force of the shaking winch is 0.3-1 ton.
The traction force of the hand winch is 0.5 ton.
The anchoring supporting part and the fixing seat are formed by welding, and the axial center line of the anchoring supporting part is perpendicular to the surface of the fixing seat.
The surface of the fixing seat is provided with a connecting through hole, and the traction piece is detachably connected with the fixing seat through the connecting through hole by bolts.
A method for dragging a weight by a portable column type weight dragging device comprises the following steps of
Step one: anchor support part for fixing
The anchoring supporting part is vertically and fixedly connected with the ground of the carrying field;
step two: connecting a weight to be towed with a hook at the front end of a steel wire rope on a winch;
step three: and (3) swinging a winch crank connected with the winch to finish the dragging movement of the heavy object.
A portable column type heavy object dragging device is applied to heavy objects during production and transportation.
The beneficial effects are that:
(1) The invention is fixed on the ground of the carrying field through the anchoring supporting part, so that the operation of the invention is safe.
(2) The winch is used, so that the winch saves time and labor when dragging heavy objects, and has higher working efficiency.
(3) The invention is formed by organically combining the anchoring supporting part, the fixing seat fixedly connected to the upper surface of the anchoring supporting part and the traction piece which is connected to the upper surface of the fixing seat and used for being connected with and pulled by the weight, and has the advantages of simple structure and cost saving.
The foregoing description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention more clearly understood, it can be implemented according to the content of the specification, and the following detailed description of the preferred embodiments of the present invention will be given with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a state of use diagram of the present invention;
fig. 3. Is a second structural schematic diagram of the invention.
In the figure: 1-an anchor support; 2-fixing a flange plate; 3-winch; 4-a steel wire rope; 5-hooking; 6-winch crank; 7-a chain; 8-ground; 9-drawing the steel wire; 10-anchoring ring; 11-a movable pulley; 12-weight.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
a portable column type weight dragging device according to the figure 1 comprises
The anchoring support portion 1 is provided with a plurality of holes,
the fixed seat is fixedly connected to the upper surface of the anchoring supporting part 1;
the traction piece is connected to the upper surface of the fixing seat and used for being connected with and pulled by the weight.
When in actual use, the anchoring and supporting part 1 is vertically and fixedly connected with the ground 8 of the carrying field; then connecting the heavy object to be towed with the traction piece; the dragging movement of the weight can be completed by starting the dragging piece.
In a specific application, the anchor support 1 is first fixedly connected to the floor 8 of the transport site. In this embodiment, the fixed anchor supporting part 1 is drilled on the ground 8 of the carrying site, then the anchor supporting part 1 is put into the ground, and then sealed and fixed, and the fixed anchor supporting part 1 has better effect when the weight component is large. When the drag weight is not large, the anchor support 1 can be fixed to the ground 8 of the carrying floor by bolts. The anchoring support part 1 and the ground 8 of the carrying field can be fixed in various modes, so long as the invention is firmly fixed, and the safety of dragging the heavy object is ensured.
The invention has simple structure, saves time and labor when dragging heavy objects and has higher working efficiency.
Embodiment two:
a portable column type drag weight apparatus according to fig. 1 is different from the embodiment in that: the fixing seat adopts a fixing flange plate 2, and the fixing flange plate 2 is horizontally connected to the upper surface of the anchoring supporting part 1; the anchoring support part 1 is of a columnar structure.
When in actual use, the fixing seat adopts the technical scheme of the fixed flange 2, so that the fixed connection of the traction piece is convenient, and meanwhile, the materials of the fixed flange 2 are convenient to obtain, and the cost is saved.
In actual use, the technical scheme of the columnar structure is adopted for the anchoring support part 1, so that the safety and stability of the invention are ensured, the volume of the invention is smaller, and the invention is convenient to use in different environments.
When the novel portable electronic device is specifically applied, the columnar body structure can be a cylinder or a cuboid, and the center of the columnar body structure can be provided with a cavity on the basis of ensuring stability, so that the weight of the portable electronic device is reduced, and the portable electronic device is convenient to carry. According to the environment and the actual conditions of the dragging weight, the cylindrical or cuboid anchoring support part 1 can be provided with a reinforced diagonal brace, so that the safe use of the invention when the weight 12 is dragged is ensured.
Embodiment III:
a portable column type weight dragging device according to fig. 1 and 3 is different from the embodiment in that: also comprises an anchoring ring 10 and a movable pulley 11; the anchor ring 10 is connected to the fixed seat, and the movable pulley 11 is connected to the traction member.
When in actual use, the anchoring ring 10 is connected to the fixed seat, and the main function is to provide an anchoring point for the steel wire rope, when the pulling force is increased by 1 time, one end of the hook 5 of the steel wire rope 4 on the traction member is pulled back and hung on the anchoring ring 10, the movable pulley 11 is hung on the steel wire rope 4 of the traction member, at the moment, the winch is rocked, the hook 5 on the movable pulley 11 generates pulling force which is one time greater than the original pulling force, and the heavy object 12 is easily moved in position.
Embodiment four:
a portable column type drag weight apparatus according to fig. 1 is different from the embodiment in that: the traction piece is a winch 3, a steel wire rope 4 is connected to the winch 3, and a hook 5 is connected to the front end of the steel wire rope 4.
When in actual use, the hook 5 is connected with the weight to be towed, and then the winch 3 is started, so that the weight to be towed can be conveniently moved forward. The traction piece adopts the technical scheme of the winch 3, so that the invention saves time and labor.
In this embodiment, the winch 3 and the wire rope 4 are connected by a connection method in the prior art.
Fifth embodiment:
a portable column type weight dragging device according to fig. 1 is different from the fourth embodiment in that: the winch 3 is a hand winch, and a winch crank 6 is connected to the hand winch; the traction force of the shaking winch is 0.3-1.
Preferably, the traction force of the hand winch is 0.5.
When in actual use, the winch 3 adopts a hand winch, when the winch 3 needs to be started, the winch crank 6 is only required to be rocked, the dragging of the weight can be completed, the convenience and the labor saving can be realized, and the use cost is lower.
The traction force of the hand winch adopts a technical scheme of 0.3-1 ton, so that the invention can safely drag the heavy object.
When the traction mode of the movable pulley is adopted, the pulling force of the invention can be increased by 1 time.
Example six:
a portable column type drag weight apparatus according to fig. 1 is different from the embodiment in that: the anchoring support part 1 and the fixing seat are formed by welding, and the axial center line of the anchoring support part 1 is perpendicular to the surface of the fixing seat.
In actual use, the anchoring support part 1 and the fixing seat are formed by welding, so that the stability of the invention is ensured; the axial center line of the anchoring supporting part 1 is vertical to the surface of the fixed seat, so that the invention saves labor when dragging heavy objects, ensures that the invention has even stress and is not easy to damage, and effectively prolongs the service life of the invention.
Embodiment seven:
a portable column type drag weight apparatus according to fig. 1 is different from the embodiment in that: the surface of the fixing seat is provided with a connecting through hole, and the traction piece is detachably connected with the fixing seat through the connecting through hole by bolts.
When in actual use, the fixing seat adopts the technical scheme, so that the traction piece and the fixing seat are convenient to detach and install.
Example eight:
a method for dragging a weight by a portable column type weight dragging device comprises the following steps of
Step one: anchor support 1 is fixedly arranged
The anchoring supporting part 1 is vertically and fixedly connected with the ground 8 of the carrying field;
step two: connecting a weight to be towed with a hook at the front end of a steel wire rope 4 on a winch 3;
step three: the pulling movement of the weight can be completed by shaking the winch crank 6 connected to the winch 3.
The invention conveniently, time-saving, labor-saving and safely completes the dragging movement of the heavy object through three steps.
Example nine:
a portable column type heavy object dragging device is applied to heavy objects during production and transportation.
Taking the operation of replacing the transmission chain on the drilling site as an example, as shown in fig. 2, the operation is a bordering high-altitude operation (2.5 meters), if the prior art is adopted, as one chain 7 is very heavy (300-500 kg), the replacement can be completed only by pulling the chain 7 by a minimum of 6 people, and the high-altitude operation is needed, and the engine oil carried out from the transmission case during the replacement of the chain 7 can cause slipping under the foot of an operator, so that the falling and collision injury are easily caused, and the safety risk is high, the efficiency is low, and the labor intensity is high.
By adopting the technical scheme of the invention for operation, the embodiment of the invention reduces operators to 3, wherein 1 is responsible for shaking the winch, and 2 is responsible for threading the steel wire rope, and the dragging operation can be completed at a low position on the ground. The specific process is as follows:
the traction steel wire 9 is connected with one end of the detached chain 7, the traction steel wire 9 is connected with the hook 5, and an operator shakes the winch crank 6 with the force of one hand to pull the chain 7 out of the transmission box. When the chain 7 is installed and traction is needed, the chain 7 can be installed by reversing operation.
By adopting the technical scheme, manpower is greatly reduced, and the dragging of the heavy object is efficiently and safely completed.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Under the condition of no conflict, the technical features related to the examples can be combined with each other according to actual situations by a person skilled in the art so as to achieve corresponding technical effects, and specific details of the combination situations are not described in detail herein.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
While the invention is susceptible of embodiments in accordance with the preferred embodiments, the invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.

Claims (8)

1. A portable column drag weight apparatus, characterized by: comprising
An anchor support (1),
the fixed seat is fixedly connected to the upper surface of the anchoring supporting part (1);
the traction piece is connected to the upper surface of the fixed seat and used for connecting and pulling the weight;
the device also comprises an anchor ring (10) and a movable pulley (11); the anchoring ring (10) is connected to the fixed seat, and the movable pulley (11) is connected to the traction piece;
the traction piece is a winch (3), a steel wire rope (4) is connected to the winch (3), and a hook (5) is connected to the front end of the steel wire rope (4);
the winch (3) is a hand winch, and a winch crank (6) is connected to the hand winch.
2. A portable column drag weight apparatus as claimed in claim 1, wherein: the fixing seat adopts a fixing flange plate (2), and the fixing flange plate (2) is horizontally connected to the upper surface of the anchoring supporting part (1); the anchoring supporting part (1) is of a columnar structure.
3. A portable column drag weight apparatus as claimed in claim 1, wherein: the traction force of the shaking winch is 0.3-1 ton.
4. A portable column drag weight apparatus as claimed in claim 3, wherein: the traction force of the hand winch is 0.5 ton.
5. A portable column drag weight apparatus as claimed in claim 1 or 2, wherein: the anchoring support part (1) is formed by welding with the fixed seat, and the axial center line of the anchoring support part (1) is perpendicular to the surface of the fixed seat.
6. A portable column drag weight apparatus as claimed in claim 1 or 2, wherein: the surface of the fixing seat is provided with a connecting through hole, and the traction piece is detachably connected with the fixing seat through the connecting through hole by bolts.
7. A method of towing a weight using a portable column towing a weight apparatus as claimed in any one of claims 1 to 6, comprising the steps of
Step one: fixed anchor support (1)
The anchoring supporting part (1) is vertically and fixedly connected with the ground (8) of the carrying field;
step two: connecting a weight to be towed with a hook at the front end of a steel wire rope (4) on a winch (3);
step three: and (3) swaying a winch crank (6) connected with the winch (3) to finish the dragging movement of the weight.
8. A portable column-type drag weight apparatus as claimed in any one of claims 1-6 for use in drag weights during production and transportation.
CN201911070230.4A 2019-11-05 2019-11-05 Portable column type heavy object dragging device, method and application Active CN110642170B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911070230.4A CN110642170B (en) 2019-11-05 2019-11-05 Portable column type heavy object dragging device, method and application

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911070230.4A CN110642170B (en) 2019-11-05 2019-11-05 Portable column type heavy object dragging device, method and application

Publications (2)

Publication Number Publication Date
CN110642170A CN110642170A (en) 2020-01-03
CN110642170B true CN110642170B (en) 2023-10-03

Family

ID=69014265

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911070230.4A Active CN110642170B (en) 2019-11-05 2019-11-05 Portable column type heavy object dragging device, method and application

Country Status (1)

Country Link
CN (1) CN110642170B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115178604A (en) * 2022-07-01 2022-10-14 奥莱特汽车科技有限公司 Ground suction type metal plate drawing machine
CN116038644A (en) * 2022-12-22 2023-05-02 徐州重型机械有限公司 Automatic scribing equipment and method for large-scale plate structural parts
CN222249851U (en) * 2024-03-07 2024-12-27 简贞创新科技(深圳)有限公司 Towing device

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201817212U (en) * 2010-10-09 2011-05-04 倪玉增 Heavy object elevator
CN102556877A (en) * 2010-12-09 2012-07-11 倪玉增 Weight hoister
CN202744222U (en) * 2012-04-17 2013-02-20 奉化市飞宇电器制造有限公司 Hand-operated upright column-type hydraulic crane
CN202953778U (en) * 2012-12-20 2013-05-29 王新亮 Free lifting traction system
CN203639112U (en) * 2013-11-22 2014-06-11 中建一局集团第三建筑有限公司 Heavy object moving device using pulley block for traction
CN205443968U (en) * 2015-12-28 2016-08-10 厦门理工学院 Tractive stop device during overpass jacking
CN209396793U (en) * 2019-01-08 2019-09-17 重庆千牛建设工程有限公司 A mast hoisting device
CN211110783U (en) * 2019-11-05 2020-07-28 中国石油集团川庆钻探工程有限公司长庆钻井总公司 Portable column type heavy object dragging device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201817212U (en) * 2010-10-09 2011-05-04 倪玉增 Heavy object elevator
CN102556877A (en) * 2010-12-09 2012-07-11 倪玉增 Weight hoister
CN202744222U (en) * 2012-04-17 2013-02-20 奉化市飞宇电器制造有限公司 Hand-operated upright column-type hydraulic crane
CN202953778U (en) * 2012-12-20 2013-05-29 王新亮 Free lifting traction system
CN203639112U (en) * 2013-11-22 2014-06-11 中建一局集团第三建筑有限公司 Heavy object moving device using pulley block for traction
CN205443968U (en) * 2015-12-28 2016-08-10 厦门理工学院 Tractive stop device during overpass jacking
CN209396793U (en) * 2019-01-08 2019-09-17 重庆千牛建设工程有限公司 A mast hoisting device
CN211110783U (en) * 2019-11-05 2020-07-28 中国石油集团川庆钻探工程有限公司长庆钻井总公司 Portable column type heavy object dragging device

Also Published As

Publication number Publication date
CN110642170A (en) 2020-01-03

Similar Documents

Publication Publication Date Title
CN110642170B (en) Portable column type heavy object dragging device, method and application
CN207259040U (en) A kind of power cable well lid handbarrow
CN205114899U (en) Multi -functional haulage equipment of transformer substation that tong " pan " lifted by crane is hung to longitudinal wall swing adjustable, adoption magnetism
CN105197819B (en) Vehicle frame lockable, the transformer station's multi-functional carrying equipment lifted by crane using magnetic hanging loop
CN105217487B (en) Trailing arm swings transformer station's multi-functional carrying equipment that is adjustable, being lifted by crane using suspension hook
CN201703776U (en) Inverted lifting device of storage tank
CN105384114B (en) The transformer station's multi-functional carrying equipment lifted by crane using suspension hook
CN205170235U (en) Multi -functional haulage equipment of transformer substation that tong " pan " lifted by crane is hung to frame lockable, adoption magnetism
CN201737639U (en) Integral inverted hoist
CN205114895U (en) Frame lockable, lift by crane multi -functional haulage equipment of transformer substation of angularly adjustable
CN204251234U (en) For the Multifunctional aloft-work hoisting crane of wind-power electricity generation machine overhauling, maintenance
CN211110783U (en) Portable column type heavy object dragging device
CN201336516Y (en) Device for manually installing pole top switch
CN105197812B (en) The transformer station's multi-functional carrying equipment lifted by crane using magnetic hanging loop
US20160176684A1 (en) Luffing cross member
CN205087827U (en) Multi -functional haulage equipment of transformer substation that longitudinal wall swing adjustable, adoption lifting hook lifted by crane
CN105197818B (en) Multifunctional carrying equipment capable of locking frame, adopting lifting hooks for hoisting and applied to transformer substation
CN203667268U (en) Hoisting transportation system and J-shaped hoisting transportation bracket
CN205294657U (en) Portable simple truck-mounted crane
CN211226088U (en) Portable substation column equipment hoisting device
CN206956559U (en) Quick peace for guardrail template in Bridge guardrail concrete pouring construction tears equipment open
CN205061426U (en) Adopt magnetism to hang multi -functional haulage equipment of transformer substation that tong " pan " lifted by crane
CN105217489B (en) Vehicle frame lockable, the transformer station's multi-functional carrying equipment for lifting by crane adjustable angle
CN206494642U (en) A kind of new equipment safety hanging apparatus without hoisting platform
CN104355241A (en) Multifunctional high-altitude operation crane for overhauling and maintaining wind power generator

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
TA01 Transfer of patent application right

Effective date of registration: 20211019

Address after: 100007 Oil Mansion, 9 North Avenue, Dongcheng District, Beijing, Dongzhimen

Applicant after: CHINA NATIONAL PETROLEUM Corp.

Applicant after: CNPC CHUANQING DRILLING ENGINEERING Co.,Ltd.

Address before: Room 1902, Changqing building, 151 Weiyang Road, Xi'an, Shaanxi 710018

Applicant before: CNPC CHUANQING DRILLING ENGINEERING CO., LTD. CHANGQING WELL DRILLING GENERAL Co.

TA01 Transfer of patent application right
GR01 Patent grant
GR01 Patent grant