CN114059951B - Fishing type falling-preventing device and falling-preventing device using same - Google Patents
Fishing type falling-preventing device and falling-preventing device using same Download PDFInfo
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- CN114059951B CN114059951B CN202010759809.8A CN202010759809A CN114059951B CN 114059951 B CN114059951 B CN 114059951B CN 202010759809 A CN202010759809 A CN 202010759809A CN 114059951 B CN114059951 B CN 114059951B
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- 230000000903 blocking effect Effects 0.000 claims abstract description 12
- 238000003825 pressing Methods 0.000 claims description 66
- 239000004576 sand Substances 0.000 claims description 37
- 238000011010 flushing procedure Methods 0.000 claims description 30
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 8
- 238000012360 testing method Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 description 17
- 238000009434 installation Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 230000003449 preventive effect Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 230000002265 prevention Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000005489 elastic deformation Effects 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/12—Grappling tools, e.g. tongs or grabs
- E21B31/18—Grappling tools, e.g. tongs or grabs gripping externally, e.g. overshot
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Marine Sciences & Fisheries (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a salvageable falling object preventing device and a falling object preventing device using the same. The anti-falling device comprises a connecting cylinder, a fisheable anti-falling device is arranged in the connecting cylinder in a clamping way, the fisheable anti-falling device comprises a central cylinder, and a mounting groove is formed in the central cylinder; the clamping stop block is assembled in the mounting groove; the elastic piece enables the clamping stop block to be clamped into the clamping groove of the tubular column cylinder body when the clamping stop block extends outwards; the guide inclined surface is arranged on the clamping stop block and is used for being matched with the side wall of the clamping groove of the corresponding tubular column barrel when the anti-falling object device is lifted upwards in a salvaging way, so that the clamping stop block is retracted inwards to be separated from the clamping groove; the falling object blocking structure is arranged on the central cylinder and is used for preventing falling objects from falling; and the salvaging structure is arranged on the central cylinder and is used for being connected with a salvaging tool to salvage the anti-falling object device out of the well. The anti-falling device can be used for fishing out of a well through the fishing tool, and when testing and other operations are required to be carried out in the pipe column, the pipe column does not need to be lifted down again, so that the operation cost is saved, and the construction period is shortened.
Description
Technical Field
The invention relates to a salvageable falling object preventing device and a falling object preventing device using the same.
Background
In recent years, with the development of 'three low' oil and gas reservoirs characterized by low pressure, low hole and low permeability, pumping and draining are key procedures for obtaining oil and gas productivity after fracturing construction, and are widely applied to various large oil and gas fields in China as a simple and economic induced-jetting mode.
At present, a cross retaining fork is arranged at the bottom of an oil pipe to form an anti-falling object structure, specifically, the cross retaining fork is welded in an oil pipe coupling, a female buckle is arranged on the oil pipe coupling and is used for being connected with a male buckle at the bottom of the oil pipe, the pipe column structure can prevent a swabbing tool in the oil pipe from breaking off a well, but after swabbing operation is completed, the cross retaining fork still remains at the bottom of the oil pipe, and the space in the oil pipe can be occupied by the existence of the cross retaining fork, so that the oil pipe is not smooth.
When foam drainage is implemented in a gas well, a foam drainage rod cannot fall into the bottom of the well and be fully mixed with accumulated liquid, the foam drainage rod cannot be placed below the bottom of an oil pipe when a speed pipe drainage process is adopted, sand flushing and well flushing operation cannot be carried out when sand is discharged or the oil pipe is blocked, various testing tools cannot pass through a falling prevention frame during dynamic monitoring, inconvenience is brought to implementation of drainage process, maintenance operation and dynamic monitoring during production of a later oil gas well, if operation is carried out, the operation can only be carried out by lifting down a pipe column again, removing a cross baffle fork and then lowering the oil pipe again, so that the operation cost and the construction period can be increased.
The Chinese patent with the authorized bulletin number of CN202755934U discloses a swabbing anti-falling sand setting tool, the main body of the tool is a hollow pipe, the upper end of the hollow pipe is connected with a swabbing pipe column, four wedge plates are inserted into the pipe wall of the hollow pipe, the four wedge plates are circumferentially uniformly distributed, one end of the inner side of each wedge plate is suspended in the inner cavity of the hollow pipe, the wedge plates gradually shrink from outside to inside and incline upwards, so that in the swabbing operation process, falling objects such as a swab can be blocked from falling into a shaft by the wedge plate part in the inner cavity of the hollow pipe, but the structure of the tool provided with the wedge plates is similar to that of a cross retaining fork arranged in an oil pipe commonly used at present, the oil pipe is still not smooth, and the later operation is influenced.
Disclosure of Invention
The invention provides a fisheable falling object preventer, which solves the problems that an oil pipe is not smooth and the subsequent operation cost and the construction period are increased due to a falling object blocking structure in the prior art; meanwhile, the invention also provides a falling object preventing device using the falling object preventing device, so as to solve the problems that an oil pipe is not smooth due to a falling object blocking structure of the falling object preventing device in the prior art, and the follow-up operation cost and the construction period are increased.
In order to achieve the above purpose, the technical scheme of the salvageable anti-falling object device of the invention is as follows:
the article falling prevention device capable of being fished out is used for being installed in a corresponding tubular column barrel body to prevent articles falling, and comprises:
the central cylinder is provided with at least two mounting grooves which are uniformly distributed on the peripheral surface of the cylinder wall at intervals along the circumferential direction;
The clamping stop block is movably assembled in the mounting groove along the radial direction of the central cylinder;
the elastic piece applies elastic force for forcing the clamping stop block to move outwards, so that the clamping stop block is clamped into the clamping groove of the tubular column barrel when extending outwards;
The guide inclined surface is arranged on the clamping stop block and is obliquely arranged from outside to inside and is used for being matched with the side wall of the clamping groove of the corresponding pipe column cylinder body when the anti-falling object device is lifted upwards in a salvaging mode, the clamping stop block is propped inwards by the side wall of the clamping groove, and the elastic force of the elastic piece is overcome, so that the clamping stop block is retracted inwards to be separated from the corresponding clamping groove;
the falling object blocking structure is arranged on the central cylinder and corresponds to the inner hole of the central cylinder and is used for preventing falling objects from falling through the inner hole of the central cylinder;
and the salvaging structure is arranged on the central cylinder and is used for being connected with a corresponding salvaging tool to salvage the anti-falling object device out of the well.
The beneficial effects are that: the clamping stop block is arranged on the mounting groove of the central cylinder, the elastic piece enables the clamping stop block to extend outwards in the radial direction, the guide inclined plane on the clamping stop block is matched with the side wall of the clamping groove of the corresponding pipe column body, when the anti-falling object device is lifted up in a salvaging mode, the clamping stop block can retract inwards while moving upwards, the anti-falling object device can be lifted up through the salvaging tool smoothly, the anti-falling object structure which is arranged relatively fixedly with the central cylinder can prevent falling objects from continuously falling through the inner hole of the central cylinder, and compared with the anti-falling object tool in the prior art, the anti-falling object device can salvage out of the well through the salvaging tool, so that the full drift diameter of the pipe column is smooth, when testing and other operations are required to be carried out in the pipe column, the pipe column is not required to be lifted down again to remove the anti-falling object parts, the operation cost is saved, and the construction period is shortened.
Further, the clamping stop block comprises an inner stop block and an outer stop block, the outer stop block is arranged at the outer side of the inner stop block in the radial direction, and the inner stop block and the outer stop block are connected together through a shear screw extending along the radial direction of the central cylinder;
The upper end face of the outer stop block is an inclined plane for forming the guide inclined plane, the inner stop block is assembled in the mounting groove in an anti-falling way, and the elastic force of the elastic piece acts on the inner stop block.
The beneficial effects are that: the clamping stop block comprises an inner stop block and an outer stop block, gaps between the anti-falling device and the pipe column are blocked by sand setting, the clamping stop block cannot be retracted by lifting the anti-falling device through a fishing tool, and when the anti-falling device is lifted, a shearing screw can be sheared by upward jarring of a hydraulic jar on the fishing tool, so that the inner stop block is separated from the outer stop block, and the central cylinder can be fished out of a well.
Further, the inner stop block is provided with an anti-falling stop position on the movable stroke, and when the inner stop block is positioned in the anti-falling stop position, the outer side surface of the inner stop block is flush with the outer peripheral surface of the central cylinder or is concavely arranged relative to the outer peripheral surface of the central cylinder.
The beneficial effects are that: the inner stop block is completely located outside the clamping groove of the corresponding pipe column, and when the stop block is completely clamped so that the stop block cannot move, the center cylinder can be guaranteed to be smoothly salvaged and lifted up after the shear screw is broken.
Further, the shear screw is countersunk into the outer stop.
The beneficial effects are that: the shear screw sinks into the outer stop block, so that the outer side surface of the outer stop block is in contact with the corresponding inner wall surface on the pipe column, the pressure at the contact position of the outer stop block and the pipe column can be reduced, the friction force is reduced, and the shear screw can be prevented from being subjected to excessive shear force in advance.
Further, the central cylinder comprises a central cylinder body, an upper pressing ring and a lower pressing ring, the upper pressing ring and the lower pressing ring are fixedly connected to the upper side and the lower side of the mounting groove, the upper pressing ring and the lower pressing ring shield part of the notch of the mounting groove, and the upper pressing ring and the lower pressing ring are in blocking fit with the clamping stop block so as to prevent the clamping stop block from being separated from the mounting groove in the radial direction.
The beneficial effects are that: the upper pressing ring and the lower pressing ring form a stop limit on the pushing block in the radial direction, the structure is stable, the upper pressing ring, the lower pressing ring and the central cylinder body are designed in a split mode, the structure is reasonable, and the manufacturing and the installation are convenient.
Further, the inner hole of the lower pressing ring is communicated with the inner hole of the central cylinder, a cross retaining fork is arranged in the inner hole of the lower pressing ring, and the cross retaining fork is fixed on the inner wall of the lower pressing ring to form the retaining object structure.
The beneficial effects are that: the cross keeps off and holds in order to form and keep off the junk structure on the inner wall of lower clamping ring, simple structure can effectively block the junk.
Further, a circle of salvage steps are arranged at the hole opening of the inner hole of the central cylinder and are arranged in an inward protruding mode, and the salvage steps form the salvage structure.
The beneficial effects are that: the upper orifice of the central cylinder is provided with a salvaging step as a salvaging structure so as to adapt to a conventional salvaging tool and is not easily influenced by falling objects.
Further, the mounting groove comprises a first mounting groove and a second mounting groove, the bottom of the first mounting groove is provided with the second mounting groove, the first mounting groove is used for mounting the clamping stop block, the second mounting groove is used for mounting the elastic piece, and the elastic piece is a spring piece.
The beneficial effects are that: the spring piece is installed in the second mounting groove, can carry out spacingly to the spring piece, when spring piece radial elastic deformation, also can support the spring piece.
In order to achieve the above purpose, the technical scheme of the falling object preventing device of the invention is as follows:
a drop prevention device comprising:
the connecting cylinder is used for being arranged at the bottom of an oil pipe of a corresponding pipe column to form a part of a pipe column cylinder body, and a clamping groove is formed in the inner wall of the connecting cylinder;
the article falling prevention device capable of being fished out is used for being installed in a corresponding tubular column barrel body to prevent articles falling, and comprises:
the central cylinder is provided with at least two mounting grooves which are uniformly distributed on the peripheral surface of the cylinder wall at intervals along the circumferential direction;
The clamping stop block is movably assembled in the mounting groove along the radial direction of the central cylinder;
the elastic piece applies elastic force for forcing the clamping stop block to move outwards, so that the clamping stop block is clamped into the clamping groove of the tubular column barrel when extending outwards;
The guide inclined surface is arranged on the clamping stop block and is obliquely arranged from outside to inside and is used for being matched with the side wall of the clamping groove of the corresponding pipe column cylinder body when the anti-falling object device is lifted upwards in a salvaging mode, the clamping stop block is propped inwards by the side wall of the clamping groove, and the elastic force of the elastic piece is overcome, so that the clamping stop block is retracted inwards to be separated from the corresponding clamping groove;
the falling object blocking structure is arranged on the central cylinder and corresponds to the inner hole of the central cylinder and is used for preventing falling objects from falling through the inner hole of the central cylinder;
the salvaging structure is arranged on the central cylinder and is used for being connected with a corresponding salvaging tool to salvage the anti-falling object device out of the well;
The clamping stop block of the falling-proof device is matched with the clamping groove in a clamping way, so that the falling-proof device is installed in the connecting cylinder in a clamping way.
The beneficial effects are that: the connecting cylinder is arranged at the bottom of an oil pipe of the pipe column, the clamping groove is formed in the connecting cylinder and used for installing the anti-falling object device, the clamping stop block is arranged on the mounting groove of the central cylinder, the elastic piece enables the clamping stop block to extend outwards in the radial direction to enable the clamping stop block to be clamped into the clamping groove, the guide inclined plane on the clamping stop block is matched with the side wall of the clamping groove, when the anti-falling object device is lifted up in a salvaging mode, the clamping stop block can retract inwards while moving upwards, the anti-falling object device is guaranteed to be lifted up through a salvaging tool smoothly, the anti-falling object device can prevent falling objects from continuously falling through an inner hole of the central cylinder through the anti-falling object device structure which is arranged relatively fixedly, compared with the anti-falling object device in the prior art, the anti-falling object device can be lifted out of the well through the salvaging tool, therefore the whole diameter of the oil pipe is smooth, when testing and other operations are required in the pipe column, the operation cost is saved, and the construction period is shortened.
Further, the clamping stop block comprises an inner stop block and an outer stop block, the outer stop block is arranged at the outer side of the inner stop block in the radial direction, and the inner stop block and the outer stop block are connected together through a shear screw extending along the radial direction of the central cylinder;
The upper end face of the outer stop block is an inclined plane for forming the guide inclined plane, the inner stop block is assembled in the mounting groove in an anti-falling way, and the elastic force of the elastic piece acts on the inner stop block.
The beneficial effects are that: the clamping stop block comprises an inner stop block and an outer stop block, gaps between the anti-falling device and the pipe column are blocked by sand setting, the clamping stop block cannot be retracted by lifting the anti-falling device through a fishing tool, and when the anti-falling device is lifted, a shearing screw can be sheared by upward jarring of a hydraulic jar on the fishing tool, so that the inner stop block is separated from the outer stop block, and the central cylinder can be fished out of a well.
Further, the inner stop block is provided with an anti-falling stop position on the movable stroke, and when the inner stop block is positioned in the anti-falling stop position, the outer side surface of the inner stop block is flush with the outer peripheral surface of the central cylinder or is concavely arranged relative to the outer peripheral surface of the central cylinder.
The beneficial effects are that: the inner stop block is completely located outside the clamping groove of the corresponding pipe column, and when the stop block is completely clamped so that the stop block cannot move, the center cylinder can be guaranteed to be smoothly salvaged and lifted up after the shear screw is broken.
Further, the shear screw is countersunk into the outer stop.
The beneficial effects are that: the shear screw sinks into the outer stop block, so that the outer side surface of the outer stop block is in contact with the corresponding inner wall surface on the pipe column, the pressure at the contact position of the outer stop block and the pipe column can be reduced, the friction force is reduced, and the shear screw can be prevented from being subjected to excessive shear force in advance.
Further, the central cylinder comprises a central cylinder body, an upper pressing ring and a lower pressing ring, the upper pressing ring and the lower pressing ring are fixedly connected to the upper side and the lower side of the mounting groove, the upper pressing ring and the lower pressing ring shield part of the notch of the mounting groove, and the upper pressing ring and the lower pressing ring are in blocking fit with the clamping stop block so as to prevent the clamping stop block from being separated from the mounting groove in the radial direction.
The beneficial effects are that: the upper pressing ring and the lower pressing ring form a stop limit on the pushing block in the radial direction, the structure is stable, the upper pressing ring, the lower pressing ring and the central cylinder body are designed in a split mode, the structure is reasonable, and the manufacturing and the installation are convenient.
Further, the inner hole of the lower pressing ring is communicated with the inner hole of the central cylinder, a cross retaining fork is arranged in the inner hole of the lower pressing ring, and the cross retaining fork is fixed on the inner wall of the lower pressing ring to form the retaining object structure.
The beneficial effects are that: the cross keeps off and holds in order to form and keep off the junk structure on the inner wall of lower clamping ring, simple structure can effectively block the junk.
Further, a circle of salvage steps are arranged at the hole opening of the inner hole of the central cylinder and are arranged in an inward protruding mode, and the salvage steps form the salvage structure.
The beneficial effects are that: the upper orifice of the central cylinder is provided with a salvaging step as a salvaging structure so as to adapt to a conventional salvaging tool and is not easily influenced by falling objects.
Further, the mounting groove comprises a first mounting groove and a second mounting groove, the bottom of the first mounting groove is provided with the second mounting groove, the first mounting groove is used for mounting the clamping stop block, the second mounting groove is used for mounting the elastic piece, and the elastic piece is a spring piece.
The beneficial effects are that: the spring piece is installed in the second mounting groove, can carry out spacingly to the spring piece, when spring piece radial elastic deformation, also can support the spring piece.
Further, the upper part of the central cylinder is provided with a step, the step is provided with a transverse step surface which is upwards arranged, the connecting cylinder is provided with a sand flushing hole, the sand flushing hole corresponds to the step, and the sand flushing hole is obliquely arranged and used for flushing the sand deposit accumulated on the step.
The beneficial effects are that: the connecting cylinder is provided with a sand flushing hole, when the salvaging tool catches the anti-falling object device to lift the anti-falling object device, the salvaging tool is started, and clear water is adopted to carry out large-displacement reverse circulation well flushing, so that the clear water can wash out the sand deposit on the step through the sand flushing hole, and then the salvaging tool can be conveniently put into the salvaging tool again for salvaging.
Drawings
FIG. 1 is a schematic view of a falling object preventing device according to the present invention;
FIG. 2 is a schematic view of the anti-landing apparatus of FIG. 1 in semi-section;
Fig. 3 is a schematic cross-sectional view in the direction A-A in fig. 2.
The names of the corresponding components in the figures are:
The device comprises a connecting cylinder 1, a sand flushing hole 11, a clamping groove 12, an adaptation inclined plane 13, a central cylinder 2, a salvaging neck 21, a salvaging step 22, a mounting groove 221, a first mounting groove 222, a second mounting groove 23, a salvaging step 24, a mounting step 3, an upper pressing ring 4, a lower pressing ring 5, an outer stop block 51, a guiding inclined plane 6, an inner stop block 7, a shearing screw 8, a spring piece 9 and a cross stop fork 9.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the invention, i.e., the embodiments described are merely some, but not all, of the embodiments of the invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
It is noted that relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of a process or method comprising the element.
In the description of the present invention, the terms "mounted," "connected," "coupled," and "connected," as may be used broadly, and may be connected, for example, fixedly, detachably, or integrally, unless otherwise specifically defined and limited; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art in specific cases.
In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the term "provided" may be interpreted broadly, and for example, an object "provided" may be a part of a body, may be separately disposed from the body, and may be connected to the body, where the connection may be a detachable connection or an undetachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art in specific cases.
The present invention is described in further detail below with reference to examples.
Example 1 of the falling object preventive device of the present invention:
As shown in fig. 1, the anti-falling device comprises a connecting cylinder 1, wherein the upper end of the connecting cylinder 1 is provided with internal threads for being connected with external threads corresponding to the bottom of an oil pipe of a pipe column, and forms a part of a pipe column cylinder. The connecting cylinder 1 is internally provided with an anti-falling device which is clamped and installed in the connecting cylinder 1.
The anti-falling device comprises a central cylinder, the central cylinder comprises a central cylinder body 2, the whole central cylinder body 2 is of a cylindrical structure, and in order to more clearly describe the embodiment, the axial direction of the central cylinder body 2 is taken as the up-down direction.
As shown in fig. 1,2 and 3, the central cylinder 2 has two upper and lower sections with different outer diameter sizes, and the outer diameter size of the upper section of the central cylinder 2 is smaller than that of the lower section of the central cylinder 2.
The upper section of the central cylinder 2 is used for forming a salvage neck 21, a salvage step 23 is arranged on the hole wall of the inner hole of the salvage neck 21, and the salvage step 23 is arranged close to the edge of the upper hole of the inner hole of the central cylinder 2 so as to be connected with a corresponding salvage tool.
Four mounting grooves 22 are formed in the lower section of the central cylinder 2, and the four mounting grooves 22 are uniformly distributed in the circumferential direction of the central cylinder 2.
The installation groove 22 is provided on the outer circumferential surface of the central cylinder 2, and the groove bottom of the installation groove 22 is a step surface to form a first installation groove 221 and a second installation groove 222, the depth of the first installation groove 221 is smaller than that of the second installation groove 222, and the groove bottom of the first installation groove 221 and the groove bottom of the second installation groove 222 are both planar structures.
The spring piece 8 is mounted on the second mounting groove 222, the spring piece 8 is an arc-shaped spring piece, the arc surface of the spring piece 8 faces the outer side of the central cylinder 2, and the spring piece 8 can be elastically deformed in the radial direction. The upper and lower sides of the spring piece 8 are attached to the bottom surface of the second mounting groove 222. The second mounting groove 222 has a dimension in the up-down direction larger than that of the spring piece 8 in the up-down direction to provide a deformation space for elastic deformation of the spring piece 8.
The first mounting groove 221 is used for mounting a clamping block, the clamping block is movably assembled in the first mounting groove 221 along the radial direction of the central cylinder body 2, the clamping block comprises an outer block 5 and an inner block 6, a spring piece 8 is positioned between the inner block 6 and the bottom of the second mounting groove 222, and the spring piece 8 applies an elastic force for forcing the clamping block 5 to move outwards so as to enable the clamping block 5 to extend outwards in the radial direction.
The inner side surface and the outer side surface of the outer stop block 5 are cambered surfaces, and the lower end surface of the outer stop block 5 is a plane. The outer side surface of the inner stop block 6 is a step surface and an arc surface, and the thickness of the upper end and the lower end of the inner stop block 6 is smaller than that of the middle part of the inner stop block 6. The outer side surface of the middle part of the inner stop block 6 is used for being attached to the inner side surface of the outer stop block 5. The inner side of the inner stop block 6 is provided with a concave surface, and the concave surface is used for the cambered surface lamination of the spring piece 8.
The inner stop block 6 is provided with threaded blind holes, the threaded blind holes are arranged at two positions along the vertical direction, the outer stop block 5 is provided with threaded through holes, the threaded through holes are arranged at two positions along the vertical direction, and the threaded blind holes on the inner stop block 6 are correspondingly arranged with the threaded through holes on the outer stop block 5 and are used for installing the shear screw 7.
The inner block 6 and the outer block 5 are connected together by a shear screw 7, the head of the shear screw 7 being countersunk into a threaded through hole in the outer block 5.
The central cylinder 2 is provided with an upper pressing ring 3 and a lower pressing ring 4, the upper pressing ring 3 is arranged on the upper side of the central cylinder 2, the upper pressing ring 3 is provided with an upper section and a lower section, the outer diameter of the upper section of the upper pressing ring 3 is the same as that of the lower section, the inner diameters of the upper section and the lower section are different, and the inner diameter of the upper section of the upper pressing ring 3 is smaller than that of the lower section. The fishing neck 21 and the lower section of the central cylinder 2 are different in outer diameter size, a mounting step 24 is formed on the central cylinder 2, a section of external thread is arranged on the step surface of the mounting step 24, which is positioned on the lower section of the central cylinder 2, a section of internal thread is arranged on the inner wall of the lower section of the upper pressing ring 3, and the upper pressing ring 3 is buckled on the mounting step 24 and is fixedly connected with the central cylinder 2 through threads.
The notch upper edge of the first mounting groove 221 is close to the mounting step 24, and the lower section of the upper pressing ring 3 extends below the notch upper edge of the first mounting groove 221 to shield a part of the notch of the first mounting groove 221 to block the upper end of the inner stopper 6 in the extending direction.
The lower pressure ring 4 is arranged at the lower side of the central cylinder body 2, the lower pressure ring 4 is provided with an upper section and a lower section, the outer diameter of the upper section and the outer diameter of the lower section of the lower pressure ring 4 are the same, the inner diameters are different, and the inner diameter of the upper section of the lower pressure ring 4 is larger than the inner diameter of the lower section. The inner wall of the upper section of the lower pressing ring 4 is provided with a section of internal thread, the outer side surface of the bottom of the central cylinder 2 is provided with a section of external thread, and the lower pressing ring 3 is buckled at the bottom of the central cylinder 2 and is fixedly connected with the central cylinder 2 through threads.
The notch lower edge of the first mounting groove 221 is close to the bottom of the lower pressing ring 4, and the upper section of the lower pressing ring 4 extends above the notch lower edge of the first mounting groove 221 to shield a part of the first mounting groove 221 so as to block the lower end of the inner block 6 in the extending direction.
The inner hole of the lower section of the lower pressing ring 4 is correspondingly communicated with the inner hole of the central cylinder body 2, a cross retaining fork 9 is arranged on the lower pressing ring 4, and the cross retaining fork 9 is fixed on the inner wall of the lower section of the lower pressing ring 4 to form a retaining structure. The cross stop fork 9 shields a part of the inner hole of the central cylinder 2, so that when falling objects in the central cylinder 2, the cross stop fork 9 can stop the falling objects to stop on the cross stop fork 9.
The connecting cylinder 1 is provided with a circle of clamping groove 12, and the clamping groove 12 is used for clamping the clamping stop block of the anti-falling object device so as to install the anti-falling object device in the connecting cylinder 1. The notch of the clamping groove 12 faces to the inner side, and the upper end surface of the clamping groove 12 is an inclined surface which extends from outside to inside in an inclined manner and is used for forming an adaptive inclined surface 13. The up end of outer dog 5 is the inclined plane that extends from outside to inside slope, and the inclined plane is used for forming guide inclined plane 51, and guide inclined plane 51 is used for cooperating with adaptation inclined plane 13, when the anti-drop ware is salvaged and is carried, guide outer dog 5 upwards moves and deviate from draw-in groove 12, makes outer dog 5 inwards extrude spring leaf 8 simultaneously, realizes outer dog 5 and interior dog 6 inwards withdrawal.
When the outer stop block 5 and the inner stop block 6 extend out, the outer stop block 5 is clamped into the clamping groove 12, the lower end face of the clamping groove 12 is a plane and is used for being matched with the lower end face of the outer stop block 5 to stop and limit the anti-falling device in the downward direction.
When the outer stop block 5 and the inner stop block 6 retract, the outer stop block 5 is completely separated from the clamping groove 12, so that the falling object preventer is ensured to be smoothly salvaged and lifted.
The connecting cylinder 1 is provided with four sand flushing holes 11, the four sand flushing holes 11 are uniformly distributed on the circumference of the connecting cylinder 1, the sand flushing holes 11 are round holes, extend obliquely from outside to inside and penetrate through the wall of the connecting cylinder 1. The sand flushing hole 11 is positioned at the upper part of the clamping groove 11, and the lower edge of the orifice at the inner side of the sand flushing hole 11 is flush with the upper end face of the upper pressing ring 3. Because the outer diameter of the salvaging neck 21 is smaller, a gap exists between the salvaging neck and the wall of the connecting cylinder 1, sand is easy to accumulate on the upper pressing ring 3, when more sand is deposited on the upper end surface of the upper pressing ring 3, sand can automatically slide out of a shaft by flushing clear water through the sand flushing holes 11, or sand flushing and unclamping can be realized when a salvaging anti-falling device is blocked.
When the inner stop block 6 stretches out to form a stop with the upper press ring 3 and the lower press ring 4, an anti-falling stop position of the inner stop block 6 is formed, the inner stop block 6 is separated out of the clamping groove 12, the outer side faces of the inner stop block 6 are flush with the outer side faces of the upper press ring 3 and the lower press ring 4, and gaps are reserved between the outer side faces of the upper press ring 3 and the lower press ring 4 and the inner wall of the connecting cylinder 1. When the anti-falling object device is salvaged and blocked, and sand washing and blocking relieving cannot be achieved, the outer stop block 5 and the inner stop block 6 can be separated through the hydraulic jar on the salvaging tool to enable the central cylinder body 2 to be salvaged out of a well.
During assembly, the anti-falling device is pushed into the connecting cylinder 1 on the ground, the outer stop block 5 is stably seated in the clamping groove 12, the anti-falling device is fished through a fishing tool test, the expansion and contraction performance of the outer stop block 5 and the inner stop block 6 is checked, and the anti-falling device is assembled into the connecting cylinder 1 again after no abnormality exists, so that the anti-falling device is formed.
When the device is used, the anti-falling device is arranged at the bottom of the pipe column, the pipe column is put into a well along with the pipe column, and the pumping device is arranged for pumping and draining after the pipe column is put into a preset well depth position. After the pumping operation is finished, the ground blowout prevention system is installed, the fishing tool string is lowered through the high-strength steel wire, and the fishing tool string is combined into: rope cap + weighting rod + hydraulic jar + universal joint + drag for the spear, this kind of fishing tool belongs to conventional prior art, and the fishing tool stops to 20m above the target depth down, then slowly descends to the fish top of interior fishing neck 21 again, lifts up the fishing tool cluster after successfully dragging for central barrel 2, takes care of controlling the lifting speed, monitors steel wire tension at any time. And when the fishing tool string is 100m away from the wellhead, the fishing tool string is slowed down and slowly passes through the wellhead, after the tool string enters the lubricator, the wellhead gate is closed, the pressure in the lubricator is removed, and therefore the anti-drop device is fished out of the well.
If the salvaging tool salvages the anti-falling device and encounters resistance, the salvaging tool is started, the large-displacement reverse circulation well flushing is carried out by adopting clean water, so that the liquid washes out the sand setting on the upper pressing ring 3 through the sand punching holes 11 until the performance of the outlet liquid is basically consistent with that of the well entering liquid, and then the salvaging tool string is put into the salvaging tool string again to try salvaging; if the central cylinder is still blocked after sand washing, a hydraulic jar is used for shocking upwards to shear the shear screw 7, so that the outer stop block 5 and the inner stop block 6 are separated, and then the central cylinder is fished out of the well.
By adopting the falling object preventing device, the falling object preventing device can be used for salvaging out of the well through the salvaging tool, so that the full-path smoothness of the tubular column body is realized, when testing and other operations are required to be carried out in the tubular column, the tubular column is not required to be lifted down again to remove the falling object preventing component, the operation cost is saved, and the construction period is shortened. In order to cope with the condition that the salvaging is blocked, a sand flushing hole 11 is formed in the connecting cylinder 1 so as to realize sand flushing and unblocking through well flushing, and further, a shear screw 7 is arranged between the inner stop block 6 and the outer stop block 5, so that when the sand flushing unblocking can not solve the problem of blocking, the shear screw 7 can be broken through a hydraulic jar on a salvaging tool, the central cylinder can be lifted upwards to salvage the well, and the use reliability of the falling object preventing device is ensured.
Example 2 of the falling object preventive device in the present invention,
The difference between this embodiment and embodiment 1 is that the connecting cylinder in embodiment 1 is provided with a sand flushing hole so as to perform sand flushing and unclamping, so that the anti-falling device can be fished out of the well, while in this embodiment, the upper part of the connecting cylinder is not provided with a sand flushing hole, if the problem of salvaging and blocking occurs, the shearing screw can be directly shocked off by the hydraulic jar on the salvaging tool, so that the central cylinder can be guaranteed to salvage out of the well.
Example 3 of the falling object preventive device in the present invention,
The difference between this embodiment and embodiment 1 is that the inner stop block and the outer stop block in embodiment 1 are connected by a shear screw to form a clamping stop block, and the clamping stop block is clamped in a clamping groove, so that the anti-falling device is installed in the connecting cylinder.
Example 4 of the falling object preventive device in the present invention,
The difference between this embodiment and embodiment 1 is that the anti-falling device in embodiment 1 has four clamping stoppers to mount the anti-falling device in the connecting cylinder, while in this embodiment, the anti-falling device has two clamping stoppers to meet the mounting requirement of the anti-falling device, and in other embodiments, three clamping stoppers may be provided.
Example 5 of the falling object preventive device in the present invention,
The difference between this embodiment and embodiment 1 is that in embodiment 1, the elastic member is an arc-shaped spring piece, so that the clamping block can radially expand and contract, and in this embodiment, the elastic member is a spring, so as to meet the expansion and contraction requirements of the clamping block.
Example 6 of the falling object preventive device in the present invention,
The difference between this embodiment and embodiment 1 is that the lower pressing ring in embodiment 1 has two sections with different inner diameters, the lower pressing ring is buckled at the bottom of the central cylinder to form a stop limit for the clamping stop block, and in this embodiment, the inner hole of the lower pressing ring is an drift diameter and is annularly arranged on the peripheral surface of the bottom of the central cylinder to stop limit for the clamping stop block.
Example 7 of the falling object preventive device in the present invention,
The difference between this embodiment and embodiment 1 is that the cross-shaped retaining fork in embodiment 1 is fixed on the inner wall of the lower pressing ring to form a retaining structure to prevent the falling object from falling, while in this embodiment, three retaining rods are arranged on the lower pressing ring at intervals in parallel, and two ends of each retaining rod are connected on the inner wall of the lower pressing ring to form a retaining structure to prevent the falling object from falling.
Embodiments of the anti-falling device of the invention:
The embodiment of the anti-falling device according to the present invention, that is, the anti-falling device described in any one of embodiments 1 to 7 of the anti-falling device, and the specific structure thereof will not be described herein.
It should be noted that the above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, but may be modified without inventive effort or equivalent substitution of some technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a can drag for prevent falling object ware for install in corresponding tubular column barrel in order to prevent falling object whereabouts, its characterized in that includes:
the central cylinder is provided with at least two mounting grooves which are uniformly distributed on the peripheral surface of the cylinder wall at intervals along the circumferential direction;
The clamping stop block is movably assembled in the mounting groove along the radial direction of the central cylinder;
the elastic piece applies elastic force for forcing the clamping stop block to move outwards, so that the clamping stop block is clamped into the clamping groove of the tubular column barrel when extending outwards;
The guide inclined surface is arranged on the clamping stop block and is obliquely arranged from outside to inside and is used for being matched with the side wall of the clamping groove of the corresponding pipe column cylinder body when the anti-falling object device is lifted upwards in a salvaging mode, the clamping stop block is propped inwards by the side wall of the clamping groove, and the elastic force of the elastic piece is overcome, so that the clamping stop block is retracted inwards to be separated from the corresponding clamping groove;
the falling object blocking structure is arranged on the central cylinder and corresponds to the inner hole of the central cylinder and is used for preventing falling objects from falling through the inner hole of the central cylinder;
and the salvaging structure is arranged on the central cylinder and is used for being connected with a corresponding salvaging tool to salvage the anti-falling object device out of the well.
2. The article drop preventer of claim 1, wherein the snap-fit stop comprises an inner stop and an outer stop, the outer stop being radially outwardly of the inner stop, the inner stop and the outer stop being connected together by a shear screw extending radially along the central barrel;
The upper end face of the outer stop block is an inclined plane for forming the guide inclined plane, the inner stop block is assembled in the mounting groove in an anti-falling way, and the elastic force of the elastic piece acts on the inner stop block.
3. The article drop preventer of claim 2, wherein the inner stop has an anti-drop stop position on its travel, and wherein the outer side surface of the inner stop is flush with or recessed relative to the outer peripheral surface of the central cylinder when the inner stop is in the anti-drop stop position.
4. The anti-landing device of claim 2, wherein the shear screw is countersunk into the outer stop.
5. The article drop preventer according to any one of claims 1 to 4, wherein the central cylinder comprises a central cylinder body, an upper pressing ring and a lower pressing ring, the upper pressing ring and the lower pressing ring are fixedly connected to the upper side and the lower side of the mounting groove, the upper pressing ring and the lower pressing ring shield part of the notch of the mounting groove, and the upper pressing ring and the lower pressing ring are in blocking fit with the clamping block so as to prevent the clamping block from falling out of the mounting groove in the radial direction.
6. The article drop preventer of claim 5, wherein the inner bore of the lower pressure ring is in communication with the inner bore of the central cylinder, and a cross stop fork is disposed in the inner bore of the lower pressure ring and is fixed to the inner wall of the lower pressure ring to form the article drop preventer.
7. The anti-landing device of any one of claims 1 to 4, wherein a ring of fishing steps is provided at the opening in the inner bore of the central barrel, the fishing steps protruding inwardly, the fishing steps forming the fishing structure.
8. The article drop preventer of claim 7, wherein the mounting slots comprise a first mounting slot and a second mounting slot, the second mounting slot being disposed at a bottom of the first mounting slot, the first mounting slot being configured to mount the snap-in stop, the second mounting slot being configured to mount the resilient member, the resilient member being a spring tab.
9. Anti-falling object device, its characterized in that includes:
the connecting cylinder is used for being arranged at the bottom of an oil pipe of a corresponding pipe column to form a part of a pipe column cylinder body, and a clamping groove is formed in the inner wall of the connecting cylinder;
a fall arrester according to any one of claims 1 to 8;
The clamping stop block of the falling-proof device is matched with the clamping groove in a clamping way, so that the falling-proof device is installed in the connecting cylinder in a clamping way.
10. The falling object preventing device according to claim 9, wherein a step is arranged at the upper part of the central cylinder, the step is provided with a transverse step surface which is upwards arranged, a sand flushing hole is arranged on the connecting cylinder, the sand flushing hole corresponds to the step, and the sand flushing hole is obliquely arranged and used for flushing sand deposit accumulated on the step.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010759809.8A CN114059951B (en) | 2020-07-31 | 2020-07-31 | Fishing type falling-preventing device and falling-preventing device using same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010759809.8A CN114059951B (en) | 2020-07-31 | 2020-07-31 | Fishing type falling-preventing device and falling-preventing device using same |
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| CN114059951A CN114059951A (en) | 2022-02-18 |
| CN114059951B true CN114059951B (en) | 2024-04-26 |
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| CN202010759809.8A Active CN114059951B (en) | 2020-07-31 | 2020-07-31 | Fishing type falling-preventing device and falling-preventing device using same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114813439A (en) * | 2022-04-19 | 2022-07-29 | 福建省长汀盼盼食品有限公司 | Direct drying method food moisture determination device and determination method thereof |
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| CN114059951A (en) | 2022-02-18 |
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