CN113323597B - Equipment capable of cleaning and dredging sundries in reverse circulation drill rod - Google Patents
Equipment capable of cleaning and dredging sundries in reverse circulation drill rod Download PDFInfo
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- CN113323597B CN113323597B CN202110682392.4A CN202110682392A CN113323597B CN 113323597 B CN113323597 B CN 113323597B CN 202110682392 A CN202110682392 A CN 202110682392A CN 113323597 B CN113323597 B CN 113323597B
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- guide
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- reverse circulation
- supporting chassis
- sliding groove
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- 238000004140 cleaning Methods 0.000 title abstract description 8
- 230000033228 biological regulation Effects 0.000 claims description 10
- 238000005553 drilling Methods 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims 4
- 238000000034 method Methods 0.000 abstract description 10
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 230000002708 enhancing effect Effects 0.000 abstract description 2
- 230000002787 reinforcement Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
- E21B17/043—Threaded with locking means
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/09—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Geophysics (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to the technical field of reverse circulation drill rods, in particular to equipment capable of cleaning and dredging sundries in a reverse circulation drill rod, which is beneficial to helping workers to detect deeper parts of the drill rod, and meanwhile, the buckling connection can facilitate the work of the workers; according to the invention, through the arrangement of the lead sensing device and the signal receiving device, the blocking position in the drill rod can be easily found, so that a worker can be prevented from disassembling each section of drill rod, the working time for cleaning the drill rod by the worker can be further shortened, and the working process of the reverse circulation drill rod can be accelerated; the invention has the capability of adjusting the interval between the guide pipes, and can be used for drill rods with different diameters, thereby enhancing the practicability of the invention and meeting different requirements of workers.
Description
Technical Field
The invention relates to the technical field of reverse circulation drill rods, in particular to equipment capable of cleaning and dredging sundries in a reverse circulation drill rod.
Background
At present, the common drilling method in China mainly comprises a forward circulation hole forming process and a reverse circulation hole forming process, wherein the reverse circulation hole forming process is a drilling process that slurry flows into a hole from an annular gap between a drill rod and a hole wall to cool a pile head and carry sediments to return to the ground from an inner cavity of the drill rod, a device adopted by the reverse circulation hole forming process is a reverse circulation drilling machine, and meanwhile, in the current stage, the reverse circulation drilling machine is universal in construction, but for geology with more complex geological conditions and more sundries, the reverse circulation drill rod is easy to block due to more sundries, each drill rod needs to be dismantled again for dredging, and time is wasted seriously.
If there is an equipment when the phenomenon of jam appears in the reverse circulation drilling rod, can confirm the position that the reverse circulation drilling rod is inside to cause the jam, only need clear up the detection jam position when clearing up afterwards, just so can not dismantle every section drilling rod, and then just can not waste the time that the staff washd the drilling rod.
Disclosure of Invention
The invention aims to provide equipment capable of cleaning and dredging sundries in a reverse circulation drill rod, so as to solve the problems in the process.
In order to achieve the purpose, the invention provides the following technical scheme: an equipment capable of cleaning and dredging sundries in a reverse circulation drill rod, wherein a first guide sliding groove is uniformly formed in a supporting chassis in a penetrating mode, a square sliding block is placed at the inner end of the first guide sliding groove, an integrally formed lower clamping block is arranged at one end of the square sliding block, a limiting clamping column connected with a screw is arranged on the middle side of one end of the square sliding block, an inward supporting spring is sleeved on the limiting clamping column, a bearing disc connected with the screw is arranged at the other end of the square sliding block, a tail guide pipe connected with the screw is arranged at one end of the bearing disc, a middle access guide pipe connected with a buckle is arranged at one end of the tail guide pipe, an end guide pipe connected with the buckle is arranged at one end of the middle access guide pipe, guide locking rods are symmetrically arranged on two sides of the supporting chassis, a convex sliding groove is formed in a penetrating mode at one end of each guide locking rod, a convex sliding block is arranged on one side of the inner end of the convex sliding groove, and a locking screw rod connected with a penetrating mode is arranged at the upper end of each guide locking rod, and locking screw one end sets up the fixed attaching plate that the pivot is connected, support the chassis lower extreme and evenly arranged the signal receiver of screw connection, and support the chassis middle-end and run through the adjusting screw who sets up threaded connection, the adjusting screw upper end sets up the linkage disc that the pivot is connected, and the square board of articulated regulation and control of connecting is evenly arranged to linkage disc upper end, the square board one end of regulation and control sets up the articulated drum that cup joints of connecting, it is provided with the reinforcement disc to support the chassis top.
Preferably, consolidate the disc lower extreme and evenly set up the spliced pole of screw connection, and the spliced pole with support the relation of connection between the chassis and be connected for the screw, it leads to the spout to evenly run through on the reinforcement disc and has seted up the second, and the second leads to the position of spout and the position of first leading to the spout is corresponding, the second leads to spout inner and is provided with the afterbody pipe, and the second leads to spout upper end one side and is provided with symmetrical board, and the relation of connection between symmetrical board and the reinforcement disc is welded connection, symmetrical board one end sets up the location cylinder of screw connection, and the quantity that the location cylinder set up is two, the interval that sets up between the location cylinder is greater than the twice of the square board height of regulation and control.
Preferably, the upper end of the end guide pipe is provided with a lead sensing device connected with a screw, the connection relationship between the lead sensing device and the signal receiving device is signal connection, the number of the lead sensing devices and the number of the signal receiving devices are four, and each lead sensing device is independently connected with one of the signal receiving devices.
Preferably, the inward supporting spring is located in the first guiding chute, the initial length of the inward supporting spring is greater than the first groove length of the guiding chute, the limiting clamping column penetrates through the supporting chassis and is arranged, the length of the limiting clamping column is the same as the first groove length of the guiding chute, and the width of the lower clamping block is greater than the first groove width of the guiding chute.
Preferably, the connection relation between the convex sliding block and the supporting chassis is welded connection, the height of the convex sliding block is half of the height of the supporting chassis, the inward surface of the guide locking rod is an arc-shaped surface, the bending radian of the arc-shaped surface is matched with the outer side surface of the supporting chassis, and the maximum interval between the fixed attaching plates is larger than the diameter of the supporting chassis.
Preferably, the regulation and control square plate penetrates through the positioning cylinders and is arranged between the positioning cylinders, the length of the regulation and control square plate is larger than one half of the length of the first guide sliding groove, the sleeving cylinder is sleeved on the tail guide pipe, and the sleeving cylinder is connected with the tail guide pipe through screws.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, through setting the positions and connection relations of different conduits, the number of the conduits connected to the middle part can be increased or decreased according to the phenomenon conditions, so that the detection of deeper drilling rods by workers is facilitated, and meanwhile, the clamping connection can facilitate the work of the workers;
2. according to the invention, through the arrangement of the lead sensing device and the signal receiving device, the blocking position in the drill rod can be easily found, so that a worker can be prevented from disassembling each section of drill rod, the working time for cleaning the drill rod by the worker can be further shortened, and the working process of the reverse circulation drill rod can be accelerated;
3. the invention has the capability of adjusting the interval between the guide pipes, and can be used for drill rods with different diameters, thereby enhancing the practicability of the invention and meeting different requirements of workers.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a rear view of the present invention;
FIG. 3 is a perspective view of a support disk according to the present invention;
FIG. 4 is a schematic perspective view of a support disk of the present invention in half section;
FIG. 5 is a left side view of the support disk of the present invention.
In the figure: the device comprises a supporting chassis 1, a first guide chute 11, a square sliding block 12, a lower clamping block 13, a limiting clamping column 14, an inward supporting spring 15, a bearing disc 16, a tail guide pipe 17, a middle access guide pipe 18, an end guide pipe 19, a lead induction device 1901, a guide locking rod 2, a convex chute 21, a convex sliding block 22, a locking screw 23, a fixed attaching plate 24, a signal receiving device 3, an adjusting screw 4, a linkage disc 41, a regulation and control square plate 42, a sleeving cylinder 43, a reinforcing disc 5, a connecting column 51, a second guide chute 52, a symmetrical plate 53 and a positioning cylinder 54.
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 to 5, the present invention provides a technical solution: a first guide chute 11 is uniformly arranged on the supporting chassis 1 in a penetrating way, a square slider 12 is placed at the inner end of the first guide chute 11, one end of the square slider 12 is provided with an integrally formed lower clamping block 13, the middle side of one end of the square slider 12 is provided with a limiting clamping column 14 connected with a screw, an inward support spring 15 is sleeved on the limiting clamping column 14, the other end of the square slider 12 is provided with a bearing disc 16 connected with a screw, one end of the bearing disc 16 is provided with a tail guide pipe 17 connected with a screw, one end of the tail guide pipe 17 is provided with a middle access guide pipe 18 connected with a buckle, one end of the middle access guide pipe 18 is provided with an end guide pipe 19 connected with a buckle, two sides of the supporting chassis 1 are symmetrically provided with guide locking rods 2, one end of each guide locking rod 2 is provided with a convex chute 21 in a penetrating way, one side of the inner end of the convex chute 21 is provided with a convex slider 22, a locking screw 23 connected with a thread penetrates through the upper end of each guide locking rod 2, and locking screw 23 one end sets up the fixed attaching plate 24 that the pivot is connected, support 1 lower extreme on chassis and evenly arranged the signal receiver 3 of screw connection, and support 1 middle-end on chassis and run through the adjusting screw 4 that sets up threaded connection, the adjusting screw 4 upper end sets up the linkage disc 41 that the pivot is connected, and the square board 42 of regulation and control of articulated connection is evenly arranged to linkage disc 41 upper end, the square board 42 one end of regulation and control sets up the cylinder 43 that cup joints of articulated connection, support 1 top on chassis and be provided with reinforcing disc 5.
The lower end of the reinforced disc 5 is uniformly provided with a connecting column 51 connected by screws, the connecting column 51 is connected with the support chassis 1 by screws, the reinforced disc 5 is uniformly penetrated and provided with a second guide chute 52, the position of the second guide chute 52 corresponds to the position of the first guide chute 11, the inner end of the second guide chute 52 is provided with a tail guide pipe 17, one side of the upper end of the second guide chute 52 is provided with a symmetrical plate 53, the connecting relation between the symmetrical plate 5 and the reinforced disc 5 is welded connection, one end of the symmetrical plate 53 is provided with positioning cylinders 54 connected by screws, the number of the positioning cylinders 54 is two, and the interval arranged between the positioning cylinders 54 is greater than twice of the height of the square plate 42.
The upper end of the end conduit 19 is provided with a wire sensing device 1901 connected with a screw, the connection relationship between the wire sensing device 1901 and the signal receiving device 3 is signal connection, the number of the wire sensing device 1901 and the signal receiving device 3 is four, and each wire sensing device 1901 is independently connected with one of the signal receiving devices 3.
Inwards to supporting spring 15 be located the first inside that leads to spout 11, and inwards to supporting spring 15's initial length be greater than the first groove length that leads to spout 11, spacing calorie of post 14 all runs through the setting of supporting chassis 1, and the length of spacing calorie of post 14 is the same with the first groove length that leads to spout 11, and the width of lower screens piece 13 is greater than the first groove width that leads to spout 11.
The convex sliding block 22 is connected with the supporting chassis 1 in a welding mode, the height of the convex sliding block 22 is half of the height of the supporting chassis 1, the inward surface of the guide locking rod 2 is an arc-shaped surface, the bending radian of the arc-shaped surface is matched with the outer side surface of the supporting chassis 1, and the maximum interval between the fixed attaching plates 24 is larger than the diameter of the supporting chassis 1.
The regulating and controlling square plate 42 penetrates through the positioning cylinders 54, the length of the regulating and controlling square plate 42 is larger than one half of the length of the first guide chute 11, the sleeving cylinder 43 is sleeved on the tail guide pipe 17, and the sleeving cylinder 43 is connected with the tail guide pipe 176 through screws.
The working principle is as follows: the number of the required middle access conduits 18 is determined according to the length of the drill rod, in addition, in the using process of the device, the drill rod is firstly attached by using the fixed attaching plate 24, meanwhile, the position of the fixed attaching plate 24 is locked by using the locking screw rod 23, the position of the end conduit 19 is further adjusted according to the diameter inside the drill rod, specifically, the adjusting screw rod 4 is rotated, the adjusting screw rod 4 can enable the linkage disc 41 to move forwards or contract backwards, at the moment, under the action of the symmetrical plate 53 and the positioning cylinder 54, the linkage disc 41 adjusts the sleeving cylinder 43 through the adjusting square plate 42, at the moment, the sleeving cylinder 43 can pull the tail conduit 17, the further tail conduit 17 can enable the square sliding block 12 to slide inside the first guide chute 11 through the bearing disc 16, at the moment, the position of the tail conduit 17 can be adjusted, meanwhile, the tail guide pipe 17 slides in the second guide sliding groove 52, and then when the length of the end guide pipe 19 is larger than that of the guide locking rod 2, a part of the end guide pipe 19 firstly extends into the drill rod, the support chassis 1 can be further pushed through the convex sliding groove 21 and the convex sliding block 22, when the wire sensing device 1901 encounters a blockage, the wire sensing device 1901 transmits a signal to the signal receiving device 3, and the signal receiving device 3 gives a signal prompt to a worker.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides an equipment that can clear up debris in mediation reverse circulation drilling rod, includes support chassis (1), its characterized in that: the supporting chassis (1) is uniformly provided with a first guide sliding groove (11) in a penetrating manner, a square sliding block (12) is placed at the inner end of the first guide sliding groove (11), one end of the square sliding block (12) is provided with an integrally formed lower clamping block (13), a limiting clamping column (14) in screw connection is arranged on the middle side of one end of the square sliding block (12), an inward supporting spring (15) is sleeved on the limiting clamping column (14), the other end of the square sliding block (12) is provided with a bearing disc (16) in screw connection, one end of the bearing disc (16) is provided with a tail guide pipe (17) in screw connection, one end of the tail guide pipe (17) is provided with a middle connecting guide pipe (18) in snap connection, one end of the middle connecting guide pipe (18) is provided with an end guide pipe (19) in snap connection, and guide locking rods (2) are symmetrically arranged on two sides of the supporting chassis (1), one end of the guide locking rod (2) is provided with a convex sliding groove (21) in a penetrating way, one side of the inner end of the convex sliding groove (21) is provided with a convex sliding block (22), a locking screw rod (23) in threaded connection penetrates through the upper end of the guide locking rod (2), and one end of the locking screw rod (23) is provided with a fixed attaching plate (24) connected by a rotating shaft, the lower end of the supporting chassis (1) is uniformly provided with signal receiving devices (3) connected by screws, and the middle end of the supporting chassis (1) is provided with an adjusting screw rod (4) in threaded connection, a linkage disc (41) connected with a rotating shaft is arranged at the upper end of the adjusting screw rod (4), and the upper end of the linkage disc (41) is uniformly provided with a regulating square plate (42) which is hinged, one end of the regulation and control square plate (42) is provided with a socket cylinder (43) which is hinged, and a reinforcing disc (5) is arranged above the supporting chassis (1).
2. The equipment capable of clearing impurities in the dredging reverse circulation drill pipe according to claim 1, is characterized in that: the lower end of the reinforcing disc (5) is uniformly provided with connecting columns (51) which are connected by screws, and the connection relation between the connecting column (51) and the supporting chassis (1) is screw connection, a second guide chute (52) is uniformly arranged on the reinforcing disc (5) in a penetrating way, and the position of the second guide chute (52) corresponds to the position of the first guide chute (11), the inner end of the second guide chute (52) is provided with a tail guide pipe (17), one side of the upper end of the second guide chute (52) is provided with a symmetrical plate (53), and the connection relationship between the symmetrical plate (53) and the reinforcing disc (5) is welding connection, one end of the symmetrical plate (53) is provided with a positioning cylinder (54) connected by a screw, and the number of the positioning columns (54) is two, and the interval between the positioning columns (54) is more than twice of the height of the regulation square plate (42).
3. The equipment capable of clearing impurities in the dredging reverse circulation drill pipe according to claim 1, is characterized in that: the upper end of the end guide pipe (19) is provided with a lead sensing device (1901) connected with a screw, the connection relationship between the lead sensing device (1901) and the signal receiving device (3) is signal connection, the number of the lead sensing device (1901) and the number of the signal receiving device (3) are four, and each lead sensing device (1901) is independently connected with one signal receiving device (3).
4. The equipment capable of clearing impurities in the dredging reverse circulation drill pipe according to claim 1, is characterized in that: the inward supporting spring (15) is located inside the first guide sliding groove (11), the initial length of the inward supporting spring (15) is larger than the first groove length of the first guide sliding groove (11), the limiting clamping columns (14) penetrate through the supporting chassis (1) and are arranged, the length of the limiting clamping columns (14) is the same as the first groove length of the first guide sliding groove (11), and the width of the lower clamping block (13) is larger than the first groove width of the first guide sliding groove (11).
5. The equipment capable of clearing sundries in the dredging reverse circulation drill pipe according to claim 1 is characterized in that: the connection relation between the convex sliding block (22) and the supporting chassis (1) is welded connection, the height of the convex sliding block (22) is half of the height of the supporting chassis (1), the inward surface of the guide locking rod (2) is an arc-shaped surface, the bending radian of the arc-shaped surface is matched with the outer side surface of the supporting chassis (1), and the maximum interval between the fixed attaching plates (24) is larger than the diameter of the supporting chassis (1).
6. The equipment capable of clearing impurities in the dredging reverse circulation drill pipe according to claim 1, is characterized in that: the adjustable square plate (42) penetrates through the positioning cylinders (54) to be arranged, the length of the adjustable square plate (42) is larger than one half of the length of the first guide sliding groove (11), the sleeved cylinder (43) is sleeved on the tail guide pipe (17), and the sleeved cylinder (43) is connected with the tail guide pipe (176) through screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110682392.4A CN113323597B (en) | 2021-06-21 | 2021-06-21 | Equipment capable of cleaning and dredging sundries in reverse circulation drill rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110682392.4A CN113323597B (en) | 2021-06-21 | 2021-06-21 | Equipment capable of cleaning and dredging sundries in reverse circulation drill rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113323597A CN113323597A (en) | 2021-08-31 |
| CN113323597B true CN113323597B (en) | 2022-09-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110682392.4A Active CN113323597B (en) | 2021-06-21 | 2021-06-21 | Equipment capable of cleaning and dredging sundries in reverse circulation drill rod |
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| CN (1) | CN113323597B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6015015A (en) * | 1995-06-20 | 2000-01-18 | Bj Services Company U.S.A. | Insulated and/or concentric coiled tubing |
| US8035374B1 (en) * | 2007-10-05 | 2011-10-11 | Microline Technology Corporation | Pipe stress detection tool using magnetic barkhausen noise |
| CN107191165A (en) * | 2017-04-19 | 2017-09-22 | 中煤科工集团西安研究院有限公司 | Both-end blocks water filling device in hole |
| CN109092815A (en) * | 2018-08-12 | 2018-12-28 | 江苏捷通管业科技有限公司 | A kind of outdoor power pipe-dredging detection device |
| CN209724263U (en) * | 2019-03-26 | 2019-12-03 | 吴兆江 | A kind of part water reacting cycle drilling assembly |
| CN212454391U (en) * | 2020-06-04 | 2021-02-02 | 中石化石油工程技术服务有限公司 | High-pressure testing well opening device |
| CN213379448U (en) * | 2020-10-27 | 2021-06-08 | 南京发强机械制造有限公司 | Machine barrel punching and positioning device for double-screw extruder |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9983173B2 (en) * | 2013-04-22 | 2018-05-29 | Obschestvo S Ogranichennoy Otvetstvennostiu “Miks” | Method and device for multi-sensor electromagnetic defectoscopy of well casings |
-
2021
- 2021-06-21 CN CN202110682392.4A patent/CN113323597B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6015015A (en) * | 1995-06-20 | 2000-01-18 | Bj Services Company U.S.A. | Insulated and/or concentric coiled tubing |
| US8035374B1 (en) * | 2007-10-05 | 2011-10-11 | Microline Technology Corporation | Pipe stress detection tool using magnetic barkhausen noise |
| CN107191165A (en) * | 2017-04-19 | 2017-09-22 | 中煤科工集团西安研究院有限公司 | Both-end blocks water filling device in hole |
| CN109092815A (en) * | 2018-08-12 | 2018-12-28 | 江苏捷通管业科技有限公司 | A kind of outdoor power pipe-dredging detection device |
| CN209724263U (en) * | 2019-03-26 | 2019-12-03 | 吴兆江 | A kind of part water reacting cycle drilling assembly |
| CN212454391U (en) * | 2020-06-04 | 2021-02-02 | 中石化石油工程技术服务有限公司 | High-pressure testing well opening device |
| CN213379448U (en) * | 2020-10-27 | 2021-06-08 | 南京发强机械制造有限公司 | Machine barrel punching and positioning device for double-screw extruder |
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| CN113323597A (en) | 2021-08-31 |
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