CN109098662B - Drilling and completion pipeline blanking device - Google Patents
Drilling and completion pipeline blanking device Download PDFInfo
- Publication number
- CN109098662B CN109098662B CN201810976739.4A CN201810976739A CN109098662B CN 109098662 B CN109098662 B CN 109098662B CN 201810976739 A CN201810976739 A CN 201810976739A CN 109098662 B CN109098662 B CN 109098662B
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- fixedly connected
- plate
- motor
- electric push
- pipeline
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- 238000005553 drilling Methods 0.000 title claims abstract description 11
- 230000000694 effects Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 7
- 230000013011 mating Effects 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Storing, Repeated Paying-Out, And Re-Storing Of Elongated Articles (AREA)
- Unwinding Of Filamentary Materials (AREA)
Abstract
The invention discloses a drilling and completion pipeline blanking device which comprises a fixing frame, a blanking groove, a mounting plate, a rotating shaft, a roller, a first gear, a supporting leg, a roller wheel, a first motor, a second gear, a first electric push rod, an anti-slip plate, a conical tip, a fixing block, a fixing shaft, a placing plate, a limiting plate, a second electric push rod, a clamping plate, a supporting column, a connecting block, a pulley, a connecting plate, a second motor, a first reel, a first connecting rope, a pipe bundle, a fixing bolt, a second connecting rope, a second reel and a third motor, wherein the fixing frame is fixed on the fixing frame; this kind of bore well completion pipeline unloader simple structure, modern design, the position of placing of fixed frame is convenient for adjust, realizes the automatic movement of fixed frame, reduces the intensity of labour that the worker adjusted, improves worker's labor efficiency simultaneously, and improves the stable effect that fixed frame was placed, does benefit to the worker and uses, when using, improves the fixed effect to the pipeline is fixed, and the guarantee pipeline is stably placed and is being placed the board surface, does benefit to the use.
Description
Technical Field
The invention relates to a pipeline blanking device, in particular to a drilling and completion pipeline blanking device, and belongs to the technical field of drilling and completion application.
Background
The well completion refers to a process of communicating a well bottom and an oil layer in a certain structure after an open hole well reaches a designed well depth. The well completion is the last important link of the well drilling work and the beginning of the oil production engineering, and is closely connected with the subsequent oil production, water injection and the development of the whole oil and gas field. The quality of well completion of an oil well directly influences the production capacity and the economic life of the oil well, and even relates to whether the whole oil field can be reasonably developed.
There are a lot of problems in the completion pipeline unloading in-process of boring, if current pipeline unloader not be convenient for remove, increase labourer's intensity of labour, it is relatively poor to have some pipeline to assist the fixed effect of unloader simultaneously, probably leads to pipeline unloading in-process to take place to rock, influences the unloading efficiency of pipeline, and then influences the user and uses. Therefore, the drilling and completion pipe blanking device is provided for solving the problems.
Disclosure of Invention
The invention aims to solve the problems and provide a drilling and completion pipeline blanking device.
The invention realizes the aim through the following technical scheme, and the drilling and completion pipeline blanking device comprises a fixed frame, a mounting plate, a motor driving mechanism, a pipeline fixing mechanism and a pipeline descending mechanism;
the opposite side surface of the fixed frame is fixedly connected with a mounting plate, and the top surface of the fixed frame is provided with a discharging groove; the two mounting plates are rotatably connected through a rotating shaft, and the two opposite ends of the rotating shaft are respectively sleeved with a first gear; a first electric push rod fixedly connected with the bottom of the fixed frame is arranged between two opposite sides of the two mounting plates, and an anti-skid plate is fixedly connected with the output end of the first electric push rod; the bottom of the antiskid plate is fixedly connected with a conical tip; fixed blocks are fixedly connected to two opposite sides of the edge of the top of the fixed frame, and a fixed shaft is rotatably connected between the two fixed blocks; a third motor is fixedly connected to the edge of the top of the fixed frame, which corresponds to the edge, and the surface of an output shaft of the third motor is sleeved with a second reel; support columns are fixedly connected to two opposite sides of the middle of the fixing frame, and connecting blocks are fixedly connected to the top ends of the support columns; the top of the connecting block is rotatably connected with a pulley; the surface of the fixed shaft is sleeved with a placing plate; one side of the placing plate is fixedly connected with a connecting plate, and the other side of the placing plate is fixedly connected with a limiting plate;
the motor driving mechanism comprises a first motor, a second gear, the first gear, the rotating shaft, the mounting plate and a roller, and the first motor is mounted on the side surface of the fixed frame; the surface of the output shaft of the first motor is sleeved with a second gear, and the second gear is meshed with the first gear; the surface of the rotating shaft is sleeved with a roller; the bottom of the mounting plate is fixedly connected with a supporting leg, and the bottom of the supporting leg is rotatably connected with a roller;
the pipeline fixing mechanism comprises a second electric push rod and a clamping plate, and the second electric push rod is fixedly arranged on two opposite sides of the surface of the placing plate; the output end of the second electric push rod is fixedly connected with a clamping plate; a second connecting rope is fixedly connected to the surface of one side of the placing plate; the tail end of the second connecting rope is fixedly connected with a second reel;
the pipeline descending mechanism comprises a second motor, a first reel, a first connecting rope, a pipe bundle and a fixing bolt, and the second motor is fixedly connected to the surface of the connecting plate; the surface of the output shaft of the second motor is sleeved with a first reel, and the first reel is fixedly connected with the tube bundle through a first connecting rope sleeved on the surface; and the surface of the tube bundle is in threaded connection with a fixing bolt.
Preferably, the number of the first electric push rods is two, and the first electric push rods are positioned on two opposite sides of the bottom of the fixed frame.
Preferably, the number of the conical tips is a plurality, and the conical tips are uniformly distributed at the bottom of the antiskid plate.
Preferably, the number of the limiting plates is a plurality, the two limiting plates are vertically and fixedly connected with the placing plate, and the two limiting plates are located on two opposite sides of the placing plate.
Preferably, the number of the clamping plates is a plurality, and the cross sections of the clamping plates are of circular arc structures.
Preferably, the number of the supporting columns is two, and the supporting columns are arranged in parallel.
Preferably, the second connecting rope is slidably connected with the pulley.
Preferably, the number of the second electric push rods is equal to that of the clamping plates, and the second electric push rods are symmetrically distributed about the first connecting rope.
Preferably, the number of the second connecting ropes is two, and the second connecting ropes are arranged in parallel.
Preferably, the length of the supporting column is greater than half of the length of the placing plate, and the length of the supporting column is less than the length of the placing plate.
The invention has the beneficial effects that:
1. this kind of bore well completion pipeline unloader simple structure, modern design, the position of placing of fixed frame is convenient for adjust, realizes the automatic movement of fixed frame, reduces the intensity of labour that the worker adjusted, improves worker's labor efficiency simultaneously, and improves the stable effect that fixed frame was placed, does benefit to the worker and uses.
2. When using, improve the fixed effect fixed to the pipeline, the guarantee pipeline is stably placed and is being placed the board surface, avoids taking place the slip process placing board pivoted in-process pipeline, improves the fixed effect of pipeline, and the worker of being convenient for carries out the pipeline whereabouts, and convenient to use person uses.
3. When using, under the mating reaction through second motor, first connecting rope, tube bank and the fixing bolt that set up, realize the stable fixed of pipeline one end, simultaneously through the mating reaction of the second electric putter of setting and splint under, the stable whereabouts of guarantee pipeline has good market value, is fit for using widely.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic top view of the present invention;
FIG. 3 is a schematic side view of the connection between the placement plate and the limiting plate according to the present invention;
FIG. 4 is a side view of the bottom surface of the fixing frame of the present invention.
In the figure: 1. the device comprises a fixed frame, 101, a blanking groove, 2, a mounting plate, 3, a rotating shaft, 4, a roller, 5, a first gear, 6, a supporting leg, 7, a roller, 8, a first motor, 801, a second gear, 9, a first electric push rod, 10, an antiskid plate, 11, a conical tip, 12, a fixed block, 13, a fixed shaft, 14, a placing plate, 15, a limiting plate, 16, a second electric push rod, 17, a clamping plate, 18, a supporting column, 19, a connecting block, 20, a pulley, 21, a connecting plate, 22, a second motor, 23, a first reel, 24, a first connecting rope, 25, a pipe bundle, 26, a fixing bolt, 27, a second connecting rope, 28, a second reel, 29 and a third motor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a blanking device for a drilling and completion pipeline comprises a fixing frame 1, a mounting plate 2, a motor driving mechanism, a pipeline fixing mechanism and a pipeline descending mechanism;
the opposite side surface of the fixed frame 1 is fixedly connected with a mounting plate 2, and the top surface of the fixed frame 1 is provided with a blanking groove 101; the two mounting plates 2 are rotatably connected through a rotating shaft 3, the two opposite ends of the rotating shaft 3 are respectively sleeved with a first gear 5, and the mounting plates 2 are arranged to facilitate the placement of the rotating shaft 3; a first electric push rod 9 fixedly connected with the bottom of the fixed frame 1 is arranged between two opposite sides of the two mounting plates 2, an anti-skid plate 10 is fixedly connected with the output end of the first electric push rod 9, and the arranged first electric push rod 9 is convenient for the rest of the anti-skid plates 10 to move; the bottom of the antiskid plate 10 is fixedly connected with a conical tip 11, and the arranged conical tip 11 improves the antiskid effect of the antiskid plate 10; fixed blocks 12 are fixedly connected to two opposite sides of the edge of the top of the fixed frame 1, and a fixed shaft 13 is rotatably connected between the two fixed blocks 12; the corresponding edge of the top of the fixed frame 1 is fixedly connected with a third motor 29, the surface of an output shaft of the third motor 29 is sleeved with a second reel 28, and the third motor 29 is arranged to drive the second reel 28 to rotate; support columns 18 are fixedly connected to two opposite sides of the middle of the fixed frame 1, and connecting blocks 19 are fixedly connected to the top ends of the support columns 18; the top of the connecting block 19 is rotatably connected with a pulley 20, and the arranged pulley 20 is convenient for the sliding of the second connecting rope 27; a placing plate 14 is sleeved on the surface of the fixed shaft 13; one side of the placing plate 14 is fixedly connected with a connecting plate 21, and the other side of the placing plate 14 is fixedly connected with a limiting plate 15;
the motor driving mechanism comprises a first motor 8, a second gear 801, the first gear 5, the rotating shaft 3, the mounting plate 2 and the roller 4, the first motor 8 is mounted on the side surface of the fixed frame 1, and the roller 7 is arranged to facilitate the movement of the fixed frame 1; the surface of the output shaft of the first motor 8 is sleeved with a second gear 801, and the second gear 801 is meshed with the first gear 5; the surface of the rotating shaft 3 is sleeved with a roller 4; the bottom of the mounting plate 2 is fixedly connected with a supporting leg 6, the bottom of the supporting leg 6 is rotatably connected with a roller 7, and the arranged roller 7 is convenient for the fixed frame 1 to stably move;
the pipeline fixing mechanism comprises a second electric push rod 16 and a clamping plate 17, the second electric push rod 16 is fixedly arranged on two opposite sides of the surface of the placing plate 14, and the arranged second electric push rod 16 is convenient for driving the clamping plate 17 to move; the output end of the second electric push rod 16 is fixedly connected with a clamping plate 17; a second connecting rope 27 is fixedly connected to one side surface of the placing plate 14; the tail end of the second connecting rope 27 is fixedly connected with a second reel 28, and the second reel 28 is arranged to drive the second connecting rope 27 to rotate;
the pipeline descending mechanism comprises a second motor 22, a first reel 23, a first connecting rope 24, a pipe bundle 25 and a fixing bolt 26, the second motor 22 is fixedly connected to the surface of the connecting plate 21, and the second motor 22 is arranged to drive the connecting plate 21 to stably slide; the surface of the output shaft of the second motor 22 is sleeved with a first reel 23, and the first reel 23 is fixedly connected with a tube bundle 25 through a first connecting rope 24 sleeved on the surface; the surface of the tube bundle 25 is connected with a fixing bolt 26 through screw threads.
The number of the first electric push rods 9 is two, and the first electric push rods 9 are positioned at two opposite sides of the bottom of the fixed frame 1, so that the first electric push rods 9 are compactly placed, and the antiskid plates 10 are conveniently pushed to move; the number of the conical tips 11 is a plurality, and the conical tips 11 are uniformly distributed at the bottom of the antiskid plate 10, so that the friction force of the antiskid plate 10 is improved; the number of the limiting plates 15 is several, two limiting plates 15 are vertically and fixedly connected with the placing plate 14, and the two limiting plates 15 are positioned on two opposite sides of the placing plate 14 to ensure that the placing plate 14 is vertically placed; the number of the clamping plates 17 is a plurality, and the cross sections of the clamping plates 17 are of arc-shaped structures, so that the clamping effect of the pipeline is improved, and the pipeline is ensured to be stably fixed; the number of the support columns 18 is two, and the support columns 18 are arranged in parallel, so that the second connecting ropes 27 can slide conveniently; the second connecting rope 27 is connected with the pulley 20 in a sliding manner, so that the second connecting rope 27 can slide stably; the number of the second electric push rods 16 is equal to that of the clamping plates 17, and the second electric push rods 16 are symmetrically distributed relative to the first connecting rope 24, so that the pipeline is stably fixed; the number of the second connecting ropes 27 is two, and the second connecting ropes 27 are arranged in parallel, so that the second connecting ropes 27 can be conveniently and compactly arranged, and the placing plate 14 can be conveniently adjusted and moved; the length of the supporting column 18 is greater than one half of the length of the placing plate 14, and the length of the supporting column 18 is less than the length of the placing plate 14, so that the second connecting rope 27 can stably adjust the lifting of the placing plate 14.
When the device is used, firstly, all electrical components in the device are externally connected with a control switch and a power supply, the first motor 8 is started, the second gear 801 is started to rotate by the first motor 8, the second gear 801 drives the first gear 5 to rotate, the first gear 5 further drives the rotating shaft 3 sleeved on the inner wall to rotate, the rotating shaft 3 drives the roller 4 sleeved on the surface to roll, so that a user can conveniently adjust the placing position of the fixing frame 1, then the anti-skid plate 10 is pushed to descend by the first electric push rod 9, the anti-skid plate 10 is contacted with the ground through the conical tip 11 fixedly connected with the bottom of the anti-skid plate 10, the fixing frame 1 is ensured to be stably placed, then when a pipeline is placed, the pipeline is placed on the surface of the placing plate 14, the clamping plate 17 is pushed by the second electric push rod 16, the pipeline is stably fixed by the clamping plate 17, and then one end of, then by starting the second motor 22 and the third motor 29, the third motor 29 drives the second reel 28 to rotate, the second reel 28 winds the second connecting rope 27, the placing plate 14 is pulled to rotate around the fixing shaft 13 through the second connecting rope 27, the limiting plate 15 fixedly connected to one side of the placing plate 14 is attached to the top surface of the fixing frame 1, then by starting the second motor 22, the second motor 22 drives the first reel 23 to rotate, the second electric push rod 16 is started simultaneously, the second electric push rod 16 adjusts the sliding connection between the clamping plate 17 and the pipeline, and then the first connecting rope 24 is placed through the first reel 23, so that the pipeline enters the well cavity along the blanking groove 101, and the blanking process of the pipeline is completed.
The first motor 8, the second motor 22, and the third motor 29 are Y2 motors sold by constant velocity stock limited, and their supporting circuits are available from commercial vendors.
The first electric push rod 9 and the second electric push rod 16 are both XTL100 electric push rods sold by a dragon flying hardware flagship store, and the matching circuit thereof can be provided by a merchant.
It is well within the skill of those in the art to implement and protect the present invention without undue experimentation and without undue experimentation that the present invention is directed to software and process improvements.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The utility model provides a well drilling and completion pipeline unloader which characterized in that: the pipeline descending device comprises a fixed frame (1), a mounting plate (2), a motor driving mechanism, a pipeline fixing mechanism and a pipeline descending mechanism;
the opposite side surface of the fixed frame (1) is fixedly connected with a mounting plate (2), and the top surface of the fixed frame (1) is provided with a blanking groove (101); the two mounting plates (2) are rotationally connected through a rotating shaft (3), and the two opposite ends of the rotating shaft (3) are sleeved with first gears (5); a first electric push rod (9) fixedly connected with the bottom of the fixed frame (1) is arranged between two opposite sides of the two mounting plates (2), and an anti-skid plate (10) is fixedly connected with the output end of the first electric push rod (9); the bottom of the antiskid plate (10) is fixedly connected with a conical tip (11); the two opposite sides of the edge of the top of the fixed frame (1) are fixedly connected with fixed blocks (12), and a fixed shaft (13) is rotatably connected between the two fixed blocks (12); a third motor (29) is fixedly connected to the edge of the top of the fixed frame (1) corresponding to the edge, and a second reel (28) is sleeved on the surface of an output shaft of the third motor (29); support columns (18) are fixedly connected to two opposite sides of the middle of the fixed frame (1), and connecting blocks (19) are fixedly connected to the top ends of the support columns (18); the top of the connecting block (19) is rotatably connected with a pulley (20); a placing plate (14) is sleeved on the surface of the fixed shaft (13); one side of the placing plate (14) is fixedly connected with a connecting plate (21), and the other side of the placing plate (14) is fixedly connected with a limiting plate (15);
the motor driving mechanism comprises a first motor (8), a second gear (801), the first gear (5), the rotating shaft (3), the mounting plate (2) and the roller (4), and the first motor (8) is mounted on the side surface of the fixed frame (1); a second gear (801) is sleeved on the surface of an output shaft of the first motor (8), and the second gear (801) is meshed with the first gear (5); a roller (4) is sleeved on the surface of the rotating shaft (3); the bottom of the mounting plate (2) is fixedly connected with a supporting leg (6), and the bottom of the supporting leg (6) is rotatably connected with a roller (7);
the pipeline fixing mechanism comprises a second electric push rod (16) and a clamping plate (17), and the second electric push rod (16) is fixedly arranged on two opposite sides of the surface of the placing plate (14); the output end of the second electric push rod (16) is fixedly connected with a clamping plate (17); a second connecting rope (27) is fixedly connected to the surface of one side of the placing plate (14); the tail end of the second connecting rope (27) is fixedly connected with a second reel (28);
the pipeline descending mechanism comprises a second motor (22), a first reel (23), a first connecting rope (24), a pipe bundle (25) and a fixing bolt (26), and the second motor (22) is fixedly connected to the surface of the connecting plate (21); the surface of an output shaft of the second motor (22) is sleeved with a first reel (23), and the first reel (23) is fixedly connected with the pipe bundle (25) through a first connecting rope (24) sleeved on the surface; the surface of the tube bundle (25) is in threaded connection with a fixing bolt (26).
2. A completion pipe blanking device as claimed in claim 1, wherein: the number of the first electric push rods (9) is two, and the first electric push rods (9) are located on two opposite sides of the bottom of the fixed frame (1).
3. A completion pipe blanking device as claimed in claim 1, wherein: the number of the conical tips (11) is a plurality, and the conical tips (11) are uniformly distributed at the bottom of the antiskid plate (10).
4. A completion pipe blanking device as claimed in claim 1, wherein: the number of the limiting plates (15) is a plurality, two limiting plates (15) are vertically and fixedly connected with the placing plate (14), and the two limiting plates (15) are positioned on two opposite sides of the placing plate (14).
5. A completion pipe blanking device as claimed in claim 1, wherein: the number of the clamping plates (17) is a plurality, and the cross section of each clamping plate (17) is of a circular arc structure.
6. A completion pipe blanking device as claimed in claim 1, wherein: the number of the supporting columns (18) is two, and the supporting columns (18) are arranged in parallel.
7. A completion pipe blanking device as claimed in claim 1, wherein: the second connecting rope (27) is connected with the pulley (20) in a sliding mode.
8. A completion pipe blanking device as claimed in claim 1, wherein: the number of the second electric push rods (16) is equal to that of the clamping plates (17), and the second electric push rods (16) are symmetrically distributed relative to the first connecting rope (24).
9. A completion pipe blanking device as claimed in claim 1, wherein: the number of the second connecting ropes (27) is two, and the second connecting ropes (27) are arranged in parallel.
10. A completion pipe blanking device as claimed in claim 1, wherein: the length of the supporting column (18) is larger than one half of the length of the placing plate (14), and the length of the supporting column (18) is smaller than the length of the placing plate (14).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201810976739.4A CN109098662B (en) | 2018-08-25 | 2018-08-25 | Drilling and completion pipeline blanking device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201810976739.4A CN109098662B (en) | 2018-08-25 | 2018-08-25 | Drilling and completion pipeline blanking device |
Publications (2)
Publication Number | Publication Date |
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CN109098662A CN109098662A (en) | 2018-12-28 |
CN109098662B true CN109098662B (en) | 2020-02-21 |
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ID=64851002
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Application Number | Title | Priority Date | Filing Date |
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CN201810976739.4A Expired - Fee Related CN109098662B (en) | 2018-08-25 | 2018-08-25 | Drilling and completion pipeline blanking device |
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CN (1) | CN109098662B (en) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT411383B (en) * | 2001-11-30 | 2003-12-29 | Techmo Entw & Vertriebs Gmbh | METHOD AND DEVICE FOR DRILLING HOLES |
US8439125B2 (en) * | 2008-01-22 | 2013-05-14 | Grounding Perfection, Inc. | Apparatus, method and system for deep earth grounding |
CN201512352U (en) * | 2009-10-26 | 2010-06-23 | 江苏融泰石油科技股份有限公司 | Semi-automatic self-balanced type drilling rig lifting appliance |
CN202952106U (en) * | 2012-12-05 | 2013-05-29 | 姜堰市纳特钻具有限公司 | Discharging and feeding frame of petroleum drill head |
CN105888574A (en) * | 2016-05-27 | 2016-08-24 | 成都北方石油勘探开发技术有限公司 | Well completion pipe string |
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2018
- 2018-08-25 CN CN201810976739.4A patent/CN109098662B/en not_active Expired - Fee Related
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Granted publication date: 20200221 Termination date: 20210825 |