CN113982527A - Small-diameter oil pipe plug - Google Patents
Small-diameter oil pipe plug Download PDFInfo
- Publication number
- CN113982527A CN113982527A CN202111259612.9A CN202111259612A CN113982527A CN 113982527 A CN113982527 A CN 113982527A CN 202111259612 A CN202111259612 A CN 202111259612A CN 113982527 A CN113982527 A CN 113982527A
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- mandrel
- cap
- head
- head end
- hinge
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- 230000007246 mechanism Effects 0.000 claims abstract description 42
- 238000007789 sealing Methods 0.000 claims abstract description 28
- 238000003825 pressing Methods 0.000 claims abstract description 25
- 230000008878 coupling Effects 0.000 claims abstract description 9
- 238000010168 coupling process Methods 0.000 claims abstract description 9
- 238000005859 coupling reaction Methods 0.000 claims abstract description 9
- 238000004146 energy storage Methods 0.000 claims abstract description 4
- 238000001125 extrusion Methods 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 230000000994 depressogenic effect Effects 0.000 claims description 7
- 239000012212 insulator Substances 0.000 claims 1
- 230000035939 shock Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 238000004873 anchoring Methods 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000010030 laminating Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 210000003456 pulmonary alveoli Anatomy 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
- E21B33/1295—Packers; Plugs with mechanical slips for hooking into the casing actuated by fluid pressure
Abstract
The invention discloses a small-diameter oil pipe plug which comprises a starting locking mechanism, wherein the starting locking mechanism comprises a positioning pressing cap, a mandrel penetrates through the positioning pressing cap, the mandrel is not completely separated from the positioning pressing cap, and the head end of the positioning pressing cap is detachably connected with an elastic locking piece; the air pressure energy storage power mechanism comprises a power push cylinder arranged at the head end of the elastic locking piece, and a piston push head is fixed on the mandrel; the positioning mechanism comprises a wing plate assembly arranged at the head end of the power push cylinder, the wing plate assembly is used for positioning the small-diameter tubing plug at a tubing coupling, a clamp spring assembly is arranged at the head end of the wing plate assembly and is used for enabling the mandrel to slide in a single direction, and a plurality of hinge slips arranged along the circumferential direction are arranged at the head end of the clamp spring assembly; sealing mechanism includes elastic sealing member, and the elastic sealing member both ends all are equipped with the extruded article, and the dabber runs through two extruded articles and elastic sealing member, and the external diameter of this device is not more than 38mm, can satisfy present construction requirement, and its shutoff power is big, and the compressive capacity is strong, and the shutoff success rate is high.
Description
Technical Field
The invention relates to the technical field of special under-pressure operation auxiliary tools in oilfield workover treatment, in particular to a small-diameter oil pipe plug.
Background
At present, tools for blocking an oil pipe under pressure are various in oil field under pressure operation, a tool string is blocked step by step in order to ensure that no leakage exists in the whole process of pulling up and down a pipe column under pressure operation, a generally used blanking plug in the blocking process generally comprises a slip mechanism, a sealing mechanism, a setting mechanism, a locking mechanism and a positioning mechanism which are sequentially connected from top to bottom, the blanking plug is lifted up after being delivered to a preset position through a steel wire, and the positioning mechanism is clamped at a pipe coupling to position the blanking plug in the pipe column; continuously lifting the plug, cutting off a positioning pin in the setting mechanism, pushing a piston cylinder in the setting mechanism by bottom hole liquid to move upwards, opening a slip of the slip mechanism, and anchoring the slip on the inner wall of the oil pipe; then the slip mechanism extrudes the sealing mechanism to enable a rubber sleeve of the sealing mechanism to tightly press the inner wall of the pipe column after expansion, so as to realize setting; simultaneously, the locking mechanism locks the piston cylinder; thereby completing the installation of the plug which is capable of blocking the flow of fluid in the string.
However, when an oil pipe with an inner diameter of 62mm is plugged, the plugging device can reach a preset plugging position through a channel with a diameter of 45mm or smaller, the plugging device can guarantee plugging of a hole with a diameter of 62mm, and meanwhile, the plugging device has a smaller diameter, however, the existing plugging device generally has a high-pressure cavity and a low-pressure cavity, firstly, the existing plugging device occupies a lot of space and is not convenient for reducing the diameter of the plugging device, secondly, because the plugging device needs to reduce the diameter, the space of each part of a tool string in the plugging device is limited, further, the slips are difficult to be well fixed, so that the slips are easy to fall off or unstable to anchor, and a positioning pin of the existing plugging device setting mechanism can push a piston cylinder to move upwards after being cut, so that the positioning pin is only used for fixing the position, when the pressure difference in the cavity is too large, the positioning pin is easy to be cut by mistake, the plugging success rate is influenced, and the plugging device mainly depends on hydraulic power to drive the piston cylinder to move, the plugging force is small, and the plugging success rate is also influenced.
Due to the reasons, the number of the conventional plug capable of meeting the construction requirements is small, and the plugging success rate is low, so that a novel small-diameter oil pipe plug is urgently needed at present.
Disclosure of Invention
The invention aims to provide a small-diameter oil pipe plug to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a small-diameter oil pipe plug, which comprises:
the starting and locking mechanism comprises a positioning pressing cap, a mandrel penetrates through the positioning pressing cap, the mandrel is not completely separated from the positioning pressing cap, a positioning pin is fixed between the mandrel and the positioning pressing cap, the head end of the positioning pressing cap is detachably connected with an elastic locking piece, and the elastic locking piece is detachably connected with the mandrel;
the pneumatic energy storage power mechanism comprises a power push cylinder arranged at the head end of the elastic locking piece, the mandrel penetrates through the power push cylinder, a piston push head is fixed on the mandrel, and the piston push head is connected in the power push cylinder in a sliding manner;
the positioning mechanism comprises a wing plate assembly arranged at the head end of the power push cylinder, the wing plate assembly is used for positioning the small-diameter tubing plug at a tubing coupling, a clamp spring assembly is arranged at the head end of the wing plate assembly and is used for enabling the mandrel to slide unidirectionally, a plurality of hinge slips arranged along the circumferential direction are arranged at the head end of the clamp spring assembly, and the opening angles of the hinge slips are gradually increased along with the sliding of the mandrel;
the sealing mechanism is positioned at the head end of the hinge slip and comprises an elastic sealing piece, both ends of the elastic sealing piece are provided with extrusion pieces, the mandrel penetrates through the two extrusion pieces and the elastic sealing piece, the head end of the mandrel is provided with a guide head, and the outer diameter of the tail end of the guide head is larger than the inner diameter of the extrusion pieces;
the outer diameter of the small-diameter oil pipe plug is not more than 38 mm.
Preferably, the tail end of cap is pressed in the location is fixed with salvages the head, the dabber is worn to locate in salvaging the head, the dabber is located the part in the cap is pressed in the location is fixed with the tail cap, tail cap movably set up in the cap is pressed in the location, the tail end of tail cap does not deviate from salvage the inner chamber of head, be equipped with the step hole in the cap is pressed in the location, the tail cap with the elastic locking piece is located respectively the both ends in step hole, the external diameter of tail cap head end is greater than the internal diameter in step hole.
Preferably, the elasticity locking piece includes the locking jump ring, the locking jump ring compress in the cap is pressed in the location, circumference is equipped with the depressed part on the dabber, the joint of locking jump ring with the depressed part joint, the locking jump ring is kept away from the one end that the cap was pressed in the location is fixed in the tail end of power pushing cylinder.
Preferably, the two interface ends of the mandrel and the power pushing cylinder are both sleeved with O-shaped rings, and the piston pushing head is in contact with the inner cavity of the power pushing cylinder.
Preferably, the wing plate assembly comprises a wing plate support fixed at the head end of the power pushing cylinder, a wing plate is mounted on the wing plate support, and the opening angle of the wing plate faces the tail end.
Preferably, the clamp spring assembly comprises stopping clamp springs respectively arranged at the upper end and the lower end of the mandrel, a plurality of stopping grooves which are sequentially arranged at intervals are formed in the upper end and the lower end of the mandrel along the axial direction, and the stopping grooves are abutted to the stopping clamp springs.
Preferably, the hinge slips with be equipped with the mounting between the extruded piece, the surface circumference of mounting is equipped with a plurality of toper slides, the toper slide with the hinge slips one-to-one, just the hinge slips with toper slide sliding connection, the toper slide is followed mounting head end to tail end narrow gradually, the hinge slips is kept away from the one end swing joint of mounting is on the slip bowl.
Preferably, the number of the hinge slips is three, and the three hinge slips are arranged at equal intervals along the circumferential direction.
Preferably, the extrusion comprises a shroud and the resilient seal comprises at least one rubber tube disposed between the shrouds.
Preferably, the steel gasket is attached between the protective cover and the rubber cylinders, and the spacers are attached between the adjacent rubber cylinders.
The invention discloses the following technical effects: during the throwing construction, the plug is fed into well through cable and the cable to the well tool string, the well tool string is lifted slowly to some distance below the set depth, the integral unit is clamped to the oil pipe coupling via the wing plate assembly in the positioning mechanism, the locating pin is cut off after the integral unit is lifted continuously, the locating pressing cap is separated from the elastic locking part under the action of pulling force to release the elastic locking part, the power pushing cylinder is unlocked and the inner space of the power pushing cylinder is compressed to form pneumatic power cavity inside the power pushing cylinder and compressed during the motion of the piston pushing head, the locating pressing cap is lifted continuously by the throwing tool to drive the mandrel to move upwards to compress the locating mechanism and the sealing mechanism together with the power pushing cylinder and to anchor and seal to block the passage inside the oil pipe, and the pneumatic power cavity forms single cavity structure during use, the hydraulic pressure is used as the auxiliary power, on one hand, the diameter of the blanking plug can be conveniently reduced, on the other hand, under the action of the pneumatic power cavity, the elastic sealing element realizes the plugging under the combined action of the lifting force of the piston push head matched with the power push cylinder and the delivery tool during the delivery, the plugging force is large, the pressure resistance is strong, and in order to adapt to the small size and precision of the plug, the slips are fixed by hinges, so that the slips can not fall off or be anchored unstably, the problem that the plugging success rate is influenced by mistakenly shearing the positioning pin is prevented by using the double fixing mode of the positioning pin and the locking clamp spring, the maximum outer diameter of the packer is 38mm, the packer can be applied to complete the construction task of graded plugging of tool strings in wells through inner channels of most of oil-water well tools in the oil field at present, and the plugging success rate is integrally improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic structural view of a small diameter tubing plug of the present invention;
FIG. 2 is a schematic view of the structure of the start locking mechanism of the present invention;
FIG. 3 is a schematic structural view of the pneumatic energy-storing power mechanism according to the present invention;
FIG. 4 is a schematic structural diagram of the positioning mechanism of the present invention;
FIG. 5 is a schematic structural view of the sealing mechanism of the present invention;
the fishing tool comprises a fishing head 1, a tail cap 2, a mandrel 3, a positioning pressing cap 4, a positioning pin 5, a locking snap spring 6, an O-shaped ring 7, a power pushing cylinder 8, a piston pushing head 9, a wing plate support 10, a wing plate 12, a stopping snap spring 13, a slip seat 14, a hinge slip 15, a conical slide 16, a protective cover 17, a steel pad 18, a rubber cylinder 19, a spacer 20 and a guide head 21.
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.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1-5, the invention provides a small-diameter tubing plug for temporarily plugging a channel in an oil pipe, belonging to the field of workover tools in petroleum machinery, and the specific structure comprises:
the locking mechanism is started, the locking mechanism comprises a positioning pressing cap 4, a mandrel 3 penetrates through the positioning pressing cap 4, the mandrel 3 can be regarded as an integrated shaft, relative sliding does not exist between parts of the integrated mandrel 3 for realizing various functions, the mandrel 3 does not completely separate from the positioning pressing cap 4, so that the mandrel 3 and the positioning pressing cap 4 move synchronously in the pulling and lifting process, a positioning pin 5 is fixed between the mandrel 3 and the positioning pressing cap 4, the head end of the positioning pressing cap 4 is detachably connected with an elastic locking piece, the elastic locking piece is detachably connected with the mandrel 3, the positioning pin 5 is cut off in the lifting process, and the elastic locking piece can be separated from the positioning pressing cap 4 and release a connecting part with the mandrel 3;
the pneumatic energy storage power mechanism comprises a power push cylinder 8 arranged at the head end of an elastic locking piece, a mandrel 3 penetrates through the power push cylinder 8, a piston push head 9 is fixed on the mandrel 3, the piston push head 9 is connected in the power push cylinder 8 in a sliding manner, and in the pulling and lifting process, the piston push head 9 and the power push cylinder 8 slide relatively, so that a pneumatic power cavity is formed in part of an inner cavity of the compressed power push cylinder 8, the plugging is realized under the action of the lifting force resultant force of a delivery tool in cooperation with hydraulic auxiliary power, the plugging force is large, and the pressure resistance is strong;
the positioning mechanism comprises a wing plate assembly arranged at the head end of the power pushing cylinder 8, the wing plate assembly is used for positioning the small-diameter tubing plug at a tubing coupling, the whole plug descends to a certain distance below a preset depth and then slowly lifts, the plug is positioned at the tubing coupling through the wing plate assembly, a clamp spring assembly is arranged at the head end of the wing plate assembly, the clamp spring assembly is used for enabling the mandrel 3 to slide in a single direction so as to ensure that the mandrel 3 only ascends in the single direction and does not fall back when the plug is lifted in a pulling force, a plurality of hinge slips 15 arranged in the circumferential direction are arranged at the head end of the clamp spring assembly, the opening angles of the hinge slips 15 are gradually increased along with the sliding of the mandrel 3, and when the mandrel 3 ascends in the single direction, the opening angles of the hinge slips 15 are gradually increased until the hinge slips are attached to the inner wall of a tubing so as to realize anchoring;
the sealing mechanism is positioned at the head end of the hinge slip 15 and comprises an elastic sealing piece, both ends of the elastic sealing piece are provided with extrusion pieces, the mandrel 3 penetrates through the two extrusion pieces and the elastic sealing piece, the head end of the mandrel 3 is provided with a guide head 21, the two extrusion pieces are connected through threads, the outer diameter of the tail end of the guide head 21 is larger than the inner diameter of the extrusion pieces, when the mandrel 3 ascends in a single direction, the guide head 21 is driven to ascend synchronously, so that the two extrusion pieces reversely extrude the elastic sealing piece, and after the two ends of the elastic sealing piece are extruded, the outer diameter of the middle part of the elastic sealing piece is widened to block a channel in a tube;
the outer diameter of the small-diameter oil pipe plug is not more than 38mm, and the small-diameter oil pipe plug can be applied to complete the construction task of graded plugging of tool strings in wells through inner channels of most oil-water well tools in oil fields at present.
During the throwing construction process of the blanking plug, a steel wire is fed into a tool string in a well through a cable, the steel wire descends to a certain distance below a preset depth, the steel wire is slowly lifted, the integral device is clamped at the position of an oil pipe coupling through a wing plate assembly in a positioning mechanism, the positioning pin 5 is sheared by continuous lifting, the positioning pressure cap 4 can be separated from an elastic locking piece under the action of pulling force, the elastic locking piece is released, the locking of a power pushing cylinder 8 is released, the internal space of the power pushing cylinder 8 is compressed, an air pressure power cavity is formed in the inner cavity of the power pushing cylinder 8, the piston pushing head 9 is compressed when moving, the positioning pressure cap 4 is continuously lifted by a throwing tool, the mandrel 3 is driven to move upwards together, the positioning mechanism and a sealing mechanism are compressed under the combined action of the power pushing cylinder 8, and the anchoring and sealing are simultaneously to realize the blockage of a channel in the oil pipe.
Further optimization scheme, the tail end of positioning pressure cap 4 is fixed with salvage head 1, dabber 3 wears to locate in salvage head 1, salvage head 1 is used for carrying dabber 3, the part that dabber 3 is located positioning pressure cap 4 is fixed with tail cap 2, tail cap 2 movably sets up in positioning pressure cap 4, the inner chamber of salvage head 1 is not deviate from to the tail end of tail cap 2, be equipped with the step hole in the positioning pressure cap 4, tail cap 2 and elastic locking piece are located the both ends of step hole respectively, the external diameter of tail cap 2 head end is greater than the internal diameter in step hole, in the pulling force lift-up process, dabber 3 can have relative slip with positioning pressure cap 4, slide to the step hole position and be supported until tail cap 2, just so can make positioning pressure cap 4 and dabber 3 go upward together.
Further optimize the scheme, the elasticity locking piece includes locking jump ring 6, locking jump ring 6 compresses in location pressure cap 4, circumference is equipped with the depressed part on the dabber 3, locking jump ring 6 joint and depressed part joint, locking jump ring 6 is kept away from the tail end that the cap 4 was pressed in the location was fixed in power pusher 8, when the cap 4 goes upward in the location, locking jump ring 6 is pressed the cap 4 with the location and is thrown off the release, it gets its joint to open, and throw off the depressed part, and then remove the locking of power pusher 8.
According to the further optimization scheme, the O-shaped rings 7 are sleeved at two interface ends of the mandrel and the power push cylinder 8, the piston push head 9 is in contact with the inner cavity of the power push cylinder 8, and the air pressure power cavity in the power push cylinder 8 is guaranteed to be always in a sealed state, so that air is not leaked.
Further optimize the scheme, the pterygoid lamina subassembly is including being fixed in the pterygoid lamina support 10 of 8 head ends of power pushing cylinder, installs pterygoid lamina 12 on the pterygoid lamina support 10, and the angle of opening of pterygoid lamina 12 is towards the tail end for pterygoid lamina 12 can not hinder the blanking plug and descend, and when the pulling force was lifted, the tail end of pterygoid lamina 12 belonged to the state of opening, and the joint is in tubing coupling position promptly.
Further optimize the scheme, the jump ring subassembly is including the stopping jump ring 13 at dabber 3 upper and lower both ends respectively, and the stopping groove that a plurality of intervals were arranged in proper order is all seted up along the axial at the upper and lower both ends of dabber 3, stopping groove and stopping jump ring 13 butt, and the stopping groove is similar to full alveolus, and stopping jump ring 13 has the tooth of a week and detains for dabber 3 only can one-way ascending.
In a further optimization scheme, a fixing piece is arranged between a hinge slip 15 and an extrusion piece, a plurality of conical slideways 16 are circumferentially arranged on the surface of the fixing piece, the conical slideways 16 correspond to the hinge slips 15 one by one, the hinge slips 15 are in sliding connection with the conical slideways 16, the conical slideways 16 are gradually narrowed from the head end to the tail end of the fixing piece, one end, far away from the fixing piece, of the hinge slip 15 is movably connected to a slip seat 14, the number of the hinge slips 15 is three, the three hinge slips 15 are circumferentially arranged at equal intervals, in order to adapt to the situation that the blanking plug is small in size and precise, the slips are fixed through hinges, so that the slips cannot fall off or are unstable in anchoring, when the mandrel 3 is lifted up by pulling force, relative sliding exists between the hinge slips 15 and the fixing piece, the hinge slips 15 move along the conical slideways 16, and further the opening angle of the hinge slips 15 is gradually increased, until it abuts against the channel in the pipe to achieve the anchoring effect.
Further optimize the scheme, the extruded article includes guard shield 17, and elastic sealing element includes at least one rubber cylinder 19, and rubber cylinder 19 sets up between two guard shields 17, and the laminating has steel gasket 18 between guard shield 17 and the rubber cylinder 19, and the laminating has spacer 20 between the adjacent rubber cylinder 19, and two guard shields 17 are the toper structure, and guard shield 17 extrudees its middle rubber cylinder 19 each other, and rubber cylinder 19 is pressed and takes place deformation, and the external diameter at its middle part widens gradually to the jam of intraductal passageway of realization pipe.
The advantages of the blanking plug are fully verified in field application, and a good using effect is achieved.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (10)
1. A small diameter tubing plug comprising:
the starting and locking mechanism comprises a positioning pressing cap (4), a mandrel (3) penetrates through the positioning pressing cap (4), the mandrel (3) does not completely fall off the positioning pressing cap (4), a positioning pin (5) is fixed between the mandrel (3) and the positioning pressing cap (4), an elastic locking piece is detachably connected to the head end of the positioning pressing cap (4), and the elastic locking piece is detachably connected with the mandrel (3);
the pneumatic energy storage power mechanism comprises a power push cylinder (8) arranged at the head end of the elastic locking piece, the mandrel (3) penetrates through the power push cylinder (8), a piston push head (9) is fixed on the mandrel (3), and the piston push head (9) is connected in the power push cylinder (8) in a sliding manner;
the positioning mechanism comprises a wing plate assembly arranged at the head end of the power push cylinder (8), the wing plate assembly is used for positioning the small-diameter tubing plug at a tubing coupling, a clamp spring assembly is arranged at the head end of the wing plate assembly, the clamp spring assembly is used for enabling the mandrel (3) to slide in a single direction, a plurality of hinge slips (15) arranged along the circumferential direction are arranged at the head end of the clamp spring assembly, and the opening angles of the hinge slips (15) are gradually increased along with the sliding of the mandrel (3);
the sealing mechanism is positioned at the head end of the hinge slip (15) and comprises an elastic sealing piece, both ends of the elastic sealing piece are provided with extrusion pieces, the mandrel (3) penetrates through the two extrusion pieces and the elastic sealing piece, the head end of the mandrel (3) is provided with a guide head (21), and the outer diameter of the tail end of the guide head (21) is larger than the inner diameter of the extrusion pieces;
the outer diameter of the small-diameter oil pipe plug is not more than 38 mm.
2. The small diameter tubing plug of claim 1, wherein: the tail end of cap (4) is pressed in the location is fixed with salvages head (1), dabber (3) are worn to locate in salvage head (1), dabber (3) are located the part of pressing in cap (4) in the location is fixed with tail cap (2), tail cap (2) movably set up in cap (4) is pressed in the location, the tail end of tail cap (2) does not deviate from salvage the inner chamber of head (1), be equipped with the step hole in cap (4) is pressed in the location, tail cap (2) with the elastic locking piece is located respectively the both ends in step hole, the external diameter of tail cap (2) head end is greater than the internal diameter in step hole.
3. The small diameter tubing plug of claim 1, wherein: the elasticity locking piece includes locking jump ring (6), locking jump ring (6) compress in cap (4) is pressed in the location, circumference is equipped with the depressed part on dabber (3), the joint of locking jump ring (6) with the depressed part joint, locking jump ring (6) are kept away from the one end that cap (4) were pressed in the location is fixed in the tail end of power pushing cylinder (8).
4. The small diameter tubing plug of claim 1, wherein: and the two interface ends of the mandrel and the power push cylinder (8) are both sleeved with O-shaped rings (7), and the piston push head (9) is in contact with the inner cavity of the power push cylinder (8).
5. The small diameter tubing plug of claim 1, wherein: the wing plate component comprises a wing plate support (10) fixed at the head end of the power pushing cylinder (8), a wing plate (12) is installed on the wing plate support (10), and the opening angle of the wing plate (12) faces the tail end.
6. The small diameter tubing plug of claim 1, wherein: the clamp spring assembly comprises retaining clamp springs (13) which are respectively arranged at the upper end and the lower end of the mandrel (3), a plurality of retaining grooves which are sequentially arranged at intervals are formed in the upper end and the lower end of the mandrel (3) along the axial direction, and the retaining grooves are abutted to the retaining clamp springs (13).
7. The small diameter tubing plug of claim 1, wherein: hinge slips (15) with be equipped with the mounting between the extruded piece, the surface circumference of mounting is equipped with a plurality of toper slides (16), toper slide (16) with hinge slips (15) one-to-one, just hinge slips (15) with toper slide (16) sliding connection, toper slide (16) are followed mounting head end to tail end constriction gradually, hinge slips (15) are kept away from the one end swing joint of mounting is on slip bowl (14).
8. The small diameter tubing plug of claim 1, wherein: the number of the hinge slips (15) is three, and the three hinge slips (15) are arranged at equal intervals along the circumferential direction.
9. The small diameter tubing plug of claim 1, wherein: the extrusion comprises a shield (17), the resilient seal comprises at least one rubber tube (19), the rubber tube (19) being arranged between the shields (17).
10. The small diameter tubing plug of claim 9, wherein: the guard shield (17) with steel pad (18) have been laminated between rubber tube (19), adjacent laminate between rubber tube (19) and have shock insulator (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111259612.9A CN113982527B (en) | 2021-10-28 | 2021-10-28 | Small-diameter oil pipe plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111259612.9A CN113982527B (en) | 2021-10-28 | 2021-10-28 | Small-diameter oil pipe plug |
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| Publication Number | Publication Date |
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| CN113982527A true CN113982527A (en) | 2022-01-28 |
| CN113982527B CN113982527B (en) | 2022-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111259612.9A Active CN113982527B (en) | 2021-10-28 | 2021-10-28 | Small-diameter oil pipe plug |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116641682A (en) * | 2023-07-26 | 2023-08-25 | 四川圣诺油气工程技术服务有限公司 | Vortex blade type oil pipe plug and use method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020060079A1 (en) * | 1998-12-22 | 2002-05-23 | Metcalfe Paul David | Method and apparatus for downhole sealing |
| CN2846722Y (en) * | 2005-04-15 | 2006-12-13 | 辽河石油勘探局 | Track type small diameter oil pipe blanking plug |
| CN102561991A (en) * | 2012-01-18 | 2012-07-11 | 中国石油天然气股份有限公司 | Small-diameter hydrostatic setting plug |
| CN203081391U (en) * | 2012-11-22 | 2013-07-24 | 宝鸡瑞林石油机电设备有限责任公司 | Downhole small-diameter hydraulic tubing plug |
| CN203420662U (en) * | 2013-09-06 | 2014-02-05 | 中国石油天然气股份有限公司 | Small-diameter oil pipe plug |
| CN205532462U (en) * | 2016-03-30 | 2016-08-31 | 中国石油天然气股份有限公司 | Airtight packer |
| CN111980619A (en) * | 2019-05-24 | 2020-11-24 | 中国石油天然气股份有限公司 | Oil pipe plug |
| CN113944443A (en) * | 2020-07-16 | 2022-01-18 | 中国石油天然气股份有限公司 | Blanking plug |
-
2021
- 2021-10-28 CN CN202111259612.9A patent/CN113982527B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020060079A1 (en) * | 1998-12-22 | 2002-05-23 | Metcalfe Paul David | Method and apparatus for downhole sealing |
| CN2846722Y (en) * | 2005-04-15 | 2006-12-13 | 辽河石油勘探局 | Track type small diameter oil pipe blanking plug |
| CN102561991A (en) * | 2012-01-18 | 2012-07-11 | 中国石油天然气股份有限公司 | Small-diameter hydrostatic setting plug |
| CN203081391U (en) * | 2012-11-22 | 2013-07-24 | 宝鸡瑞林石油机电设备有限责任公司 | Downhole small-diameter hydraulic tubing plug |
| CN203420662U (en) * | 2013-09-06 | 2014-02-05 | 中国石油天然气股份有限公司 | Small-diameter oil pipe plug |
| CN205532462U (en) * | 2016-03-30 | 2016-08-31 | 中国石油天然气股份有限公司 | Airtight packer |
| CN111980619A (en) * | 2019-05-24 | 2020-11-24 | 中国石油天然气股份有限公司 | Oil pipe plug |
| CN113944443A (en) * | 2020-07-16 | 2022-01-18 | 中国石油天然气股份有限公司 | Blanking plug |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116641682A (en) * | 2023-07-26 | 2023-08-25 | 四川圣诺油气工程技术服务有限公司 | Vortex blade type oil pipe plug and use method thereof |
| CN116641682B (en) * | 2023-07-26 | 2023-09-29 | 四川圣诺油气工程技术服务有限公司 | Vortex blade type oil pipe plug and use method thereof |
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|---|---|
| CN113982527B (en) | 2022-08-02 |
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