CN109056736B - Guide pipe sealing device for underwater cast-in-place concrete of cast-in-place bored pile - Google Patents
Guide pipe sealing device for underwater cast-in-place concrete of cast-in-place bored pile Download PDFInfo
- Publication number
- CN109056736B CN109056736B CN201811000595.5A CN201811000595A CN109056736B CN 109056736 B CN109056736 B CN 109056736B CN 201811000595 A CN201811000595 A CN 201811000595A CN 109056736 B CN109056736 B CN 109056736B
- Authority
- CN
- China
- Prior art keywords
- shell
- adjusting
- guide pipe
- casing
- section
- 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
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 40
- 238000003825 pressing Methods 0.000 claims abstract description 29
- 230000008602 contraction Effects 0.000 claims abstract description 6
- 230000000712 assembly Effects 0.000 claims description 8
- 238000000429 assembly Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 8
- 238000011084 recovery Methods 0.000 abstract description 7
- 238000000926 separation method Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 230000007306 turnover Effects 0.000 abstract description 2
- 238000011065 in-situ storage Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000005553 drilling Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/06—Placing concrete under water
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention provides a guide pipe sealing device for underwater cast-in-place pile concrete, which is used for sealing the bottom end of a guide pipe and comprises: the device comprises a shell and a plurality of groups of adjusting components, wherein the plurality of groups of adjusting components are annularly arranged on the periphery of the shell at intervals, and each group of adjusting components comprises an adjusting rod, a pressing plate, a spring and a recovery rope; the adjusting rod is pulled through the lifting rope to adjust the radial length between the tail end of the adjusting section of the adjusting rod and the central shaft of the shell to be larger than or smaller than the radius of the guide pipe so as to realize the clamping and the separation of the guide pipe and the shell, and the spring controls the pressing plate to abut against the adjusting section through elastic contraction. The sealing device has the characteristics of convenience in manufacturing, strong turnover, construction period saving, treatment cost reduction, strong adaptability and the like, can effectively improve the success rate of secondary hole sealing, and solves the technical problem of pile breakage.
Description
Technical Field
The invention relates to the technical field of building construction tools, in particular to a guide pipe sealing device for underwater cast-in-place concrete of a cast-in-place bored pile.
Background
In the underwater concrete pouring process of the cast-in-situ bored pile, once the guide pipe is blocked, the bottom end of the guide pipe is separated from the top surface of the concrete and the like, the quality of the formed pile is ensured to be always the key point and the difficulty of quality control. Once this occurs, the secondary sealing can only be attempted to continue the injection, except for terminating the injection and re-drilling the hole. The re-drilling cost is high, the construction period is prolonged, and the dual losses of benefit and construction period are inevitably caused, and the treatment method is reliable but extremely undesirable. In the past, secondary hole sealing treatment is mainly used in construction, but the secondary hole sealing construction has high construction difficulty and great probability of pile breaking due to mud clamping and tends to increase the consumption of concrete. In view of the above circumstances, how to improve the pile quality of the problematic pile foundation is the direction of continuous research in underwater concrete pouring construction of cast-in-situ bored piles.
Disclosure of Invention
In view of the above situation, the invention provides a guide pipe sealing device for underwater cast-in-place concrete of a cast-in-place bored pile, which is simple in structure, convenient to use and recyclable, and solves the technical problems of guide pipe blockage, separation of the bottom end of a guide pipe from the top surface of concrete, high difficulty in secondary hole sealing treatment and high pile breaking rate due to mud inclusion in the existing underwater concrete casting process.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a bored concrete pile is pipe closing device for concrete pouring under water for seal of pipe bottom, closing device includes:
a housing having a tapered shape with a hollow interior, the housing having a downward tapered end;
the multiple groups of adjusting assemblies are annularly arranged on the periphery of the shell at intervals, and each group of adjusting assembly comprises an adjusting rod, a pressing plate, a spring and a lifting rope;
the adjusting rod is provided with an adjusting section, a pulling section and a hinge part arranged between the adjusting section and the pulling section, the adjusting section penetrates out of the outer wall of the shell, the pulling section is positioned in the shell, the hinge part is formed at the part of the adjusting rod penetrating through the shell, and the radial length between the tail end of the adjusting section in a horizontal state and the central shaft of the shell is greater than the radius of the guide pipe;
the pressure plate is provided with a hinged end hinged on the outer wall of the shell and a tail end, and is positioned between the tip end of the shell and the adjusting rod;
the spring is arranged between the pressing plate and the outer wall of the shell, two ends of the spring are respectively fixed with the pressing plate and the outer wall of the shell, the spring enables the tail end of the pressing plate to extend towards the direction departing from the tip end of the shell through elastic contraction, and the tail end of the pressing plate is elastically contracted by the spring to abut against the adjusting section of the adjusting rod;
the lifting rope is fixed at the tail end of the lifting section and is lifted, and the adjusting section of the adjusting rod moves up and down by taking the hinged part as an axis.
In the embodiment of the invention, the lower part of the shell is defined between the hinged part of the adjusting rod and the tip part of the shell, the upper part of the shell is defined between the hinged part and the edge of the shell, the guide pipe is sleeved on the upper part of the shell, and the upper surface of the adjusting section in a horizontal state is abutted against the bottom edge of the guide pipe.
In the embodiment of the invention, the lifting rope is lifted, the adjusting rod is displaced downwards by taking the hinged part as an axial direction, the radial length between the tail end of the adjusting section and the central shaft of the shell is smaller than the radius of the guide pipe, and the shell is separated from the guide pipe.
In an embodiment of the present invention, the sealing device further includes a sealing ring sleeve, and the sealing ring sleeve is fixed to an edge of the outer shell.
In the embodiment of the invention, the sealing ring sleeve comprises a connecting part and a clamping part which are integrally formed, the connecting part is fixedly bonded with the inner wall of the shell and penetrates through the shell and the connecting part through bolts, the clamping part is folded towards the tip direction of the shell along the edge of the shell, and the clamping part is clamped between the inner wall of the conduit and the outer wall of the shell.
In the embodiment of the invention, the bolts are arranged on the shell at annular intervals.
In the embodiment of the invention, the inner wall of the shell is fixed with the recovery rope.
In the embodiment of the invention, the length of the adjusting section is greater than that of the pressing plate.
In the embodiment of the invention, the adjusting assemblies are at least provided with two groups.
In the embodiment of the invention, the sealing ring sleeve is an elastic piece.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
(1) the radial length between the tail end of the adjusting section of the adjusting rod and the central shaft of the shell is adjusted to be larger or smaller than the radius of the guide pipe through pulling of the lifting rope, so that the guide pipe and the shell are clamped and separated, the spring controls the pressing plate to press the adjusting section through elastic contraction or controls the pressing plate to be pressed by the adjusting section through elastic tensioning, so that the radial length between the tail end of the adjusting section and the central shaft of the shell is changed, and the clamping and separation of the guide pipe and the shell are further realized.
(2) The size of the shell can be determined according to the concrete underwater pouring guide pipe used on site, the device is suitable for guide pipes with various sizes, the sealing device is recovered by matching the adjusting rod, the spring, the pressing plate, the lifting rope and the recovery rope after being used, the guide pipe with the same size can be recycled, the utilization rate is high, the operation is simple and convenient, and the practicability is high.
(3) The method has the characteristics of convenience in manufacturing, strong turnover, construction period saving, treatment cost reduction, strong adaptability and the like, and can effectively solve the problems of cost increase due to the fact that the underwater concrete cast-in-place pile is not poured easily at the first stage and the problem that the cost is increased due to the fact that holes are formed again when the bottom end of the guide pipe is separated from the concrete surface in the pouring process and the pile breaking probability is high on the premise that the pile forming quality of the underwater concrete cast-in-place pile is guaranteed.
Drawings
Fig. 1 is a schematic elevation view of a pipe sealing apparatus for underwater concrete pouring of a cast-in-situ bored pile according to the present invention.
Fig. 2 is a schematic plan view of the pipe sealing apparatus for underwater concrete pouring of a cast-in-situ bored pile according to the present invention.
Fig. 3 is a schematic view of the connection of the spring and the pressing plate of the present invention.
Fig. 4 is a schematic view of a conduit sealing device for underwater concrete pouring of a cast-in-situ bored pile according to the present invention.
The correspondence of reference numerals to components is as follows:
a housing 1; a tip portion 11; an adjusting component 2; an adjustment lever 21; an adjustment section 211; a pull section 212; a hinge portion 213; a platen 22; a spring 23; a lifting rope 24; a sealing ring sleeve 3; a connecting portion 31; a clamping portion 32; a bolt 33; a nut 34; a conduit 4; the cord 5 is recovered.
Detailed Description
To facilitate an understanding of the present invention, the following description is made in conjunction with the accompanying drawings and examples.
Referring to fig. 1 to 4, the present invention provides a sealing device for a conduit of an underwater cast-in-place pile, which is used for sealing the bottom end of a conduit 4, and the sealing device includes a housing 1 and a plurality of sets of adjusting assemblies 2 for clamping and separating the housing 1 and the conduit 4, wherein:
the shell 1 is in a tip cone shape with a hollow interior, and the shell 1 is provided with a downward tip 11 so as to be inserted into concrete with reduced resistance;
the multiple groups of adjusting assemblies 2 are arranged on the periphery of the shell 1 at intervals in an annular shape, and each group of adjusting assemblies 2 comprises an adjusting rod 21, a pressure plate 22, a spring 23 (not shown in fig. 1 and 4) and a lifting rope 24; preferably, the plurality of sets of adjusting assemblies have at least two sets, and in the embodiment of the present invention, the plurality of sets of adjusting assemblies have three sets.
Specifically, as shown in fig. 3, the adjusting rod 21 is formed with an adjusting section 211, a pulling section 212, and a hinge 213 disposed between the adjusting section 211 and the pulling section 212, the adjusting section 211 passes through the outer wall of the housing 1, the pulling section 212 is located inside the housing 1, the hinge 213 is formed at a position where the adjusting rod 21 passes through the housing 1, and a radial length between a terminal end of the adjusting section 211 and a central axis of the housing 1 in a horizontal state is greater than a radius of the conduit 4; a lower portion of the housing 1 is defined between the hinge portion 213 of the adjustment lever 211 and the tip portion 11 of the housing 1, and an upper portion of the housing 1 is defined between the hinge portion 213 and the edge of the housing 1.
The lifting rope 24 is fixed to the end of the lifting segment 212, the lifting rope 24 is lifted, the adjusting segment 211 of the adjusting rod 21 is displaced up and down with the hinge 213 as an axis, and the radial length of the end of the adjusting segment between the central axes of the shells is increased or decreased.
The pressing plate 22 is provided with a hinged end hinged on the outer wall of the shell 1 and a tail end, the pressing plate 22 is positioned between the tip end of the shell 1 and the adjusting rod 21, and the tail end of the pressing plate 22 extends towards the direction away from the tip end of the shell 1; preferably, the length of the pressure plate 22 is less than the length of the adjustment segment 211 to prevent the housing 1 from being unable to be separated from the conduit 4 due to the pressure plate being too long in length.
The spring 23 is arranged between the pressing plate 22 and the outer wall 21 of the shell 1, two ends of the spring 23 are respectively fixed with the pressing plate 22 and the outer wall of the shell 1, the spring 23 elastically contracts to enable the tail end of the pressing plate 22 to extend towards the direction away from the tip end of the shell 1, the lifting rope 24 is lifted, the tail end of the adjusting section 211 moves downwards to be in contact with the pressing plate 22, the adjusting section 211 gradually changes from an inclined state to a horizontal state, the radial length between the tail end of the adjusting section 211 and the central shaft of the shell 1 is increased, and the tail end of the pressing plate 22 is contracted by the spring 23 to abut against the adjusting section 211 of the adjusting rod 21.
As shown in fig. 4, the guide tube 4 is sleeved on the upper portion of the housing 1, the lifting rope 24 is lifted to make the radial length between the tail end of the adjusting section 211 and the central axis of the housing 1 larger than the radius of the guide tube 4, the upper portion of the housing 1 is clamped in the guide tube 4, and the lower portion of the housing 1 is clamped at the bottom end of the guide tube 4 through the adjusting section 211 to realize the plugging of the sealing device on the bottom end of the guide tube 4; the lifting rope 24 is pulled, the tail end of the adjusting section 211 is displaced downwards by taking the hinge part 213 as an axial direction, the pressure plate 22 is pressed by the downward movement of the adjusting rod 21 to enable the spring 23 to generate an acting force opposite to the pressed direction, the radial length between the tail end of the adjusting section 211 and the central axis of the shell 1 is reduced to be smaller than the radius of the conduit 4, the shell 1 is separated from the conduit 4, and the sealing device is recovered from the conduit 4.
Preferably, two recovery ropes 5 are fixed on the inner wall of the housing 1 to facilitate recovery of the sealing device from the conduit 4.
In order to improve the sealing effect between the conduit 4 and the casing 1 and prevent water or sludge from entering the conduit 4, the sealing device further comprises a sealing ring sleeve 3, the sealing ring sleeve 3 is fixed on the edge of the casing 1, preferably, the sealing ring sleeve 3 is an elastic member, in particular, an elastic rubber ring sleeve; the sealing ring sleeve 3 comprises a connecting part 31 and a clamping part 32 which are integrally formed, the connecting part 32 is fixedly bonded with the inner wall of the shell 1 and penetrates through the shell 1 and the connecting part 31 through a bolt 33 and is matched with a nut 34 for threaded connection, the clamping part 32 of the sealing ring sleeve 3 is folded towards the tip end part of the shell 1 along the edge of the shell 1, and the clamping part 32 is clamped between the inner wall of the conduit 4 and the outer wall of the shell 1. In the embodiment of the present invention, the number of the bolts 33 is 8, the bolts 33 are arranged on the outer casing 1 at an annular interval, and preferably, the bolts 33 are fixed at a position 2cm below the edge of the outer casing 1.
The structure of the pipe sealing device for underwater concrete pouring of a cast-in-situ bored pile according to the present invention is described above in detail, and the method of using the same is described below.
Pulling the lifting rope 24, gradually changing the adjusting section 211 of the adjusting rod 21 from an inclined state to a horizontal state, wherein the radial length between the tail end of the adjusting section 211 and the central axis of the shell 1 is greater than the radius of the guide tube 4, sleeving the guide tube 4 on the upper part of the shell 1, the lower part of the shell 1 is limited below the guide tube 4, the spring 23 in the contraction state contracts to drive the pressing plate 22 to move towards the direction close to the adjusting rod 21 so as to press the adjusting section 211 of the adjusting rod 21, inserting the tip part 11 of the shell 1 into concrete, when the guide tube 4 is lowered to a designed depth, continuously pulling the lifting rope 24, gradually changing the adjusting section 211 of the adjusting rod 21 from the horizontal state to the downward inclined state, pressing the pressing plate 22 downwards by the adjusting section 211, and changing the spring 23 from the contraction state to the stretching state, the radial length between the tail end of the adjusting section 211 and the central axis of the shell 1 is gradually reduced to be smaller than the radius of the guide tube 4, and the sealing device is accommodated in the guide tube 4 and is pulled out of the guide tube 4 along with the pulling of the recovery rope 5 and the pulling rope 24 to realize recovery.
While the present invention has been described in detail and with reference to the accompanying drawings and examples, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.
Claims (10)
1. The utility model provides a bored concrete pile is pipe closing device for pouring concrete under water for the seal of pipe bottom, a serial communication port, closing device includes:
a housing having a tapered shape with a hollow interior, the housing having a downward tapered end;
the multiple groups of adjusting assemblies are annularly arranged on the periphery of the shell at intervals, and each group of adjusting assembly comprises an adjusting rod, a pressing plate, a spring and a lifting rope;
the adjusting rod is provided with an adjusting section, a pulling section and a hinge part arranged between the adjusting section and the pulling section, the adjusting section penetrates out of the outer wall of the shell, the pulling section is positioned in the shell, the hinge part is formed at the part of the adjusting rod penetrating through the shell, and the radial length between the tail end of the adjusting section in a horizontal state and the central shaft of the shell is greater than the radius of the guide pipe;
the pressure plate is provided with a hinged end hinged on the outer wall of the shell and a tail end, and is positioned between the tip end of the shell and the adjusting rod;
the spring is arranged between the pressing plate and the outer wall of the shell, two ends of the spring are respectively fixed with the pressing plate and the outer wall of the shell, the spring enables the tail end of the pressing plate to extend towards the direction departing from the tip end of the shell through elastic contraction, and the tail end of the pressing plate is elastically contracted by the spring to abut against the adjusting section of the adjusting rod;
the lifting rope is fixed at the tail end of the lifting section and is lifted, and the adjusting section of the adjusting rod moves up and down by taking the hinged part as an axis.
2. The apparatus as claimed in claim 1, wherein a lower portion of the casing is defined between the hinge portion of the adjusting lever and the tip portion of the casing, an upper portion of the casing is defined between the hinge portion and the edge of the casing, the guide pipe is inserted into the upper portion of the casing, and the upper surface of the adjusting section in a horizontal state abuts against the bottom edge of the guide pipe.
3. The apparatus of claim 2, wherein the lifting rope is pulled, the adjusting rod is displaced downward in an axial direction by the hinge portion, a radial length between a distal end of the adjusting section and a central axis of the casing is smaller than a radius of the guide pipe, and the casing is separated from the guide pipe.
4. The apparatus of claim 1, further comprising a sealing collar secured to an edge of the housing.
5. The apparatus of claim 4, wherein the sealing ring sleeve includes a connecting portion and a fastening portion, the connecting portion is bonded to the inner wall of the casing and fixed to the connecting portion by a bolt, the fastening portion is folded along the edge of the casing toward the tip of the casing, and the fastening portion is fastened between the inner wall of the conduit and the outer wall of the casing.
6. The apparatus of claim 5, wherein the bolts are arranged on the housing at annular intervals.
7. The apparatus for closing a conduit for underwater placement of a bored pile in concrete according to claim 1, wherein a retrieval string is fixed to an inner wall of the casing.
8. The apparatus of claim 1, wherein the length of the adjustment section is greater than the length of the pressing plate.
9. The apparatus for closing a conduit for underwater placement of cast-in-place piles with concrete according to claim 1, wherein said adjusting unit has at least two sets.
10. The apparatus of claim 4, wherein the sealing collar is an elastic member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811000595.5A CN109056736B (en) | 2018-08-30 | 2018-08-30 | Guide pipe sealing device for underwater cast-in-place concrete of cast-in-place bored pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811000595.5A CN109056736B (en) | 2018-08-30 | 2018-08-30 | Guide pipe sealing device for underwater cast-in-place concrete of cast-in-place bored pile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109056736A CN109056736A (en) | 2018-12-21 |
| CN109056736B true CN109056736B (en) | 2020-06-09 |
Family
ID=64757738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811000595.5A Active CN109056736B (en) | 2018-08-30 | 2018-08-30 | Guide pipe sealing device for underwater cast-in-place concrete of cast-in-place bored pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109056736B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6164872A (en) * | 1996-09-27 | 2000-12-26 | Mitsubishi Heavy Industries, Ltd. | Method of production of large tank, system using such large tank and submerged tunneling method using the tank |
| CN202220340U (en) * | 2011-08-24 | 2012-05-16 | 中交二航局第三工程有限公司 | Underwater concrete pouring conduit |
| CN202989929U (en) * | 2012-07-19 | 2013-06-12 | 中铁十六局集团第一工程有限公司 | Underwater concrete guide pipe bottom sealing device |
-
2018
- 2018-08-30 CN CN201811000595.5A patent/CN109056736B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6164872A (en) * | 1996-09-27 | 2000-12-26 | Mitsubishi Heavy Industries, Ltd. | Method of production of large tank, system using such large tank and submerged tunneling method using the tank |
| CN202220340U (en) * | 2011-08-24 | 2012-05-16 | 中交二航局第三工程有限公司 | Underwater concrete pouring conduit |
| CN202989929U (en) * | 2012-07-19 | 2013-06-12 | 中铁十六局集团第一工程有限公司 | Underwater concrete guide pipe bottom sealing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109056736A (en) | 2018-12-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109056736B (en) | Guide pipe sealing device for underwater cast-in-place concrete of cast-in-place bored pile | |
| CN102400645A (en) | Mechanical part of continuous oil pipe guiding tool | |
| CN210049874U (en) | Multifunctional gas production tool for tail end of continuous oil pipe | |
| CN112943143B (en) | Hydraulic salvaging pipe column and salvaging method for coiled tubing of downhole choke | |
| CN109113670B (en) | An electric sealed eddy current guide device | |
| CN114961566A (en) | Top drive casing pipe lowering device for small-specification casing pipe | |
| CN211115905U (en) | Blowout-preventing pipe for uninterrupted plunger drainage and gas production | |
| CN212359690U (en) | Elastic card positioning device | |
| CN2744826Y (en) | Thermal recovery horizontal well casing prestress completion device | |
| CN214944160U (en) | Lifting type booster reversing valve | |
| CN210422536U (en) | Coupling pipe column external cutting and fishing integrated tool | |
| CN210122904U (en) | Coal bed gas pressurized well repairing device | |
| CN219691501U (en) | Continuous oil pipe anchor | |
| CN212296260U (en) | Underground anti-reverse device | |
| CN211761274U (en) | Ground nail pulling structure | |
| CN215057228U (en) | Eccentric plate-turning overshot for sucker rod | |
| CN201778716U (en) | Sealed spear | |
| CN216739619U (en) | Pile drawing machine draws set mechanism | |
| CN219864921U (en) | Fishing device for high-strength clamping oil pipe | |
| CN223689916U (en) | Integrated whole cylinder type oil pump with oil drainage and disconnection functions | |
| CN222903883U (en) | Well plug core removal device | |
| CN221973461U (en) | A hydraulic release joint | |
| CN113266299B (en) | Drilling plugging device for petroleum drilling | |
| CN215632869U (en) | Pressure difference effect formula fishing tool that can move back | |
| CN222716876U (en) | Underground tool for salvaging oil pipe through core of overhaul well |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |