CN115075745B - Oil is safety joint in pit - Google Patents
Oil is safety joint in pit Download PDFInfo
- Publication number
- CN115075745B CN115075745B CN202211010214.8A CN202211010214A CN115075745B CN 115075745 B CN115075745 B CN 115075745B CN 202211010214 A CN202211010214 A CN 202211010214A CN 115075745 B CN115075745 B CN 115075745B
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- pneumatic
- sand
- bin
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- 239000004576 sand Substances 0.000 claims abstract description 61
- 239000003208 petroleum Substances 0.000 claims abstract description 10
- 230000009471 action Effects 0.000 claims description 44
- 238000000926 separation method Methods 0.000 claims description 25
- 210000003437 trachea Anatomy 0.000 claims description 9
- 210000000621 bronchi Anatomy 0.000 claims description 7
- 238000005553 drilling Methods 0.000 claims description 5
- 239000003129 oil well Substances 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 abstract description 8
- 235000011613 Pinus brutia Nutrition 0.000 abstract description 8
- 241000018646 Pinus brutia Species 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 34
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 10
- 235000017491 Bambusa tulda Nutrition 0.000 description 10
- 241001330002 Bambuseae Species 0.000 description 10
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 10
- 239000011425 bamboo Substances 0.000 description 10
- 238000010276 construction Methods 0.000 description 4
- 238000011010 flushing procedure Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002633 protecting effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/06—Releasing-joints, e.g. safety joints
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/16—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using gaseous fluids
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (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 provides a petroleum underground safety joint, and relates to the field of petroleum production. This pine sand formula oil is safety joint in pit based on high-pressure gas, including the inner tube, the inside of inner tube is provided with interior storehouse just two narrow sides in interior storehouse correspond by the lateral wall shutoff of inner tube, the inside in interior storehouse is provided with pneumatic flexible subassembly and the pneumatic pine sand subassembly of linkage with it, the outside upside fixedly connected with of inner tube connects the pipe, the inside of going up the joint pipe is provided with the pneumatic shutoff subassembly with pneumatic flexible subassembly, the linkage of pneumatic pine sand subassembly. Can drive pneumatic flexible subassembly, pneumatic sand loosening subassembly and the operation of pneumatic shutoff subassembly simultaneously through high-pressure gas, can make this joint can rely on pneumatic sand loosening mode to realize getting rid of poverty, through high-pressure gas as the power supply, be different from current hydraulic drive form, can not produce the pollution to the environment in the well, use cost is low.
Description
Technical Field
The invention relates to the technical field of petroleum production, in particular to a petroleum underground safety joint.
Background
In the process of oil exploitation, the safety joint is used for operations such as drilling, salvaging and testing, is arranged at a position where a tubing string needs to be disconnected, can transmit torque together with the tubing string and bear various composite stresses, and can complete tripping and buckling of the operating tubing string through wellhead operation when a fault occurs in a well, thereby providing an early condition for next-step underground prevention and accident relief.
In the existing petroleum production, the condition of sand burying of a pipe column is caused by improper construction measures or stratum sand production, so that the pipe column can not be subjected to rotary construction any more, the common method for sand burying at present is sand washing, sand at the bottom of a well is washed away by high-pressure sprayed high-speed flowing well washing liquid, and the washed away sand is brought to the ground by circulating return liquid flow. The application aims at providing a safety joint in pit, and it uses highly-compressed air as the power supply of pine sand, and it can enough avoid among the prior art the long problem of flushing fluid sand-washing duration, also can avoid the problem that the flushing fluid pollutes the oil well, realizes burying the purpose of getting rid of poverty under the sand condition fast.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a petroleum underground safety joint, which solves the problems that in the prior art, the well flushing fluid consumes long time for sand flushing and pollutes an oil well.
In order to realize the purpose, the invention is realized by the following technical scheme: an underground petroleum safety joint comprises an inner pipe, wherein an inner bin is arranged inside the inner pipe, two narrow side edges of the inner bin are correspondingly plugged by the side wall of the inner pipe, a pneumatic telescopic assembly and a pneumatic sand loosening assembly linked with the pneumatic telescopic assembly are arranged inside the inner bin, an upper joint pipe is fixedly connected to the upper side of the outer part of the inner pipe, and a pneumatic plugging assembly linked with the pneumatic telescopic assembly and the pneumatic sand loosening assembly is arranged inside the upper joint pipe;
the pneumatic telescopic assembly comprises an inner air pipe, short rods are mounted on two sides of the inner air pipe, the other ends of the short rods are correspondingly mounted on the side wall of the inner pipe respectively, guide rails are mounted at the bottoms of the two sides of the inner air pipe, a sliding frame is connected inside the guide rails in a sliding mode, an action cylinder is mounted at the bottom of the sliding frame, a spring reset bin is arranged below the inner portion of one end, opposite to the action cylinder, of the action cylinder, a spring is arranged between the action cylinders on the two sides, the two ends of the spring are fixedly connected to the inner wall of the spring reset bin respectively, a circular piston is connected below the inner portion of the inner air pipe in a sliding mode, another spring is sleeved outside a piston rod at the bottom of the circular piston, the bottom end of the piston rod penetrates through the bottom of the inner air pipe and is provided with a trapezoidal wedge block, and a cutting angle matched with oblique edges on two sides of the trapezoidal wedge block is arranged above one end, opposite to the action cylinders on the two sides;
pneumatic pine sand subassembly includes two drill bits, the drill bit rotates respectively to be connected in both sides the inside of an action section of thick bamboo, wherein, both sides the pine sand storehouse has all been seted up to the inside of an action section of thick bamboo back of the body one end mutually, and the position is got as the brill that holds the drill bit, both sides high-pressure pneumatic storehouse has all been seted up in the middle of the inside of an action section of thick bamboo, both sides the drill bit is located the inside axostylus axostyle section department a week of high-pressure pneumatic storehouse and evenly installs a plurality of blades, both sides the top of an action section of thick bamboo is located one side of balladeur train and has seted up the exhaust hole, both sides the exhaust hole correspondence is linked together with the inside in high-pressure pneumatic storehouse, both sides the opposite side that the top of an action section of thick bamboo is located the balladeur train all installs and communicates there is a hose, and tracheal side including the other port of hose is all installed and communicates.
Preferably, the pipe walls of the two sides of the upper joint pipe are both provided with second separation cavities, the pipe walls of the two sides of the upper joint pipe are both provided with first separation cavities below the second separation cavities, the inner walls of the two sides of the upper joint pipe are both provided with first through holes, the first through holes of the two sides are respectively communicated with the inside of the first separation cavities, the inside of the first through holes is matched with the outside of the action barrel, the axial center lines of the first through holes and the action barrel are on the same straight line, the two sides of the upper joint pipe are both provided with windows, and the windows of the two sides are respectively communicated with the inside of the first separation cavities;
the pneumatic plugging assembly comprises two plugging plates and two arc pistons, the two plugging plates are respectively corresponding to sliding connections in a first separation cavity and used as plugging windows, the two arc pistons are respectively corresponding to sliding connections in a second separation cavity, a pair of guide slide bars are respectively and slidably connected to adjacent positions of the first separation cavity and the second separation cavity in pipe walls on two sides of the upper joint pipe, the bottom ends of the guide slide bars are respectively and correspondingly installed on two sides of the top of the plugging plates, and the top ends of the guide slide bars are respectively and correspondingly installed on two sides of the bottom of the arc pistons.
Preferably, the inner walls of the two sides of the upper joint pipe are respectively provided with a bronchus, the outer side ports of the bronchus of the two sides are respectively correspondingly communicated with the inside of the second separation cavity, and the inner side ports of the bronchus of the two sides respectively penetrate through the pipe walls of the two sides of the inner pipe and are installed and communicated with the side surface of the inner pipe.
Preferably, the tube walls of the two sides of the inner tube are provided with second through holes, the inner parts of the second through holes are matched with the outer parts of the action cylinders, and the second through holes and the axial center lines of the action cylinders are positioned on the same straight line.
Preferably, the top of the inner bin is provided with an outer air pipe which is communicated with the inside of the inner bin, the outer air pipe is sleeved outside the inner air pipe, and an annular gap is formed between the outer air pipe and the inner air pipe.
Preferably, the outer lower side of the inner tube is threadedly connected with a lower joint tube.
The working principle is as follows: firstly, an upper joint pipe and a lower joint pipe are respectively used for connecting an upper pipe column and a lower pipe column which need to be connected, an outer gas pipe and an inner gas pipe are respectively correspondingly connected with an external casing pipe, the combination and arrangement form of the external casing pipe is consistent with the form between the outer gas pipe and the inner gas pipe, the outer pipe and the inner pipe of the external casing pipe are respectively communicated with the outer gas pipe and the inner gas pipe, wherein the inner gas pipe is communicated with a high-pressure gas source gas outlet and is used for introducing high-pressure gas flow into the joint, an annular gap between the outer gas pipe and the inner gas pipe is used for discharging high-pressure waste gas flow so as to ensure the internal pressure balance of the joint, when the joint is trapped and cannot rotate and get rid of the trouble due to sand burying underground, the high-pressure gas flow can be introduced from the inner gas pipe, and then partial high-pressure gas can enter into a second separation chamber from the branch gas pipes at two sides, and then arc-shaped pistons at two sides can be pressed to move downwards under the action of continuous pressure, then the plugging plate in the first separation cavity can be pushed to move downwards through the guide slide rod, so that the plugging of a window is removed, the outside sand is inserted into the first separation cavity, meanwhile, part of high-pressure gas reserved in the inner gas pipe can act on the top of the circular piston, so that the circular piston is pushed to move downwards, further, under the pushing action of the trapezoidal wedge block, the action cylinders on two sides can extend out to two sides under the guiding and limiting action of the guide rail and the sliding frame and enter the first separation cavity through the second through hole and the first through hole to be contacted with the gushed sand, similarly, part of high-pressure gas reserved in the inner gas pipe can also enter the high-pressure pneumatic bin through the hoses on two sides, at the moment, the part of high-pressure gas can continuously act on the blades outside the shaft lever of the drill bit to drive the drill bit to rotate, and the introduced high-pressure gas can be discharged out of the high-pressure pneumatic bin from the exhaust hole after the drill bit rotates, and the sand is drilled when the drilling end of the drill bit is in contact with the sand when entering the first separation cavity, so that the sand is drilled when the drill bit rotates, the drilled sand falls into the inner bottom of the inner cavity from the open hole at the bottom of the sand loosening bin, the outside sand is loosened due to loss when the drill bit continuously drills, the burying trapping effect of the sand on the joint is eliminated, the joint can be released by means of pneumatic sand loosening, the rotary force is applied to the upper pipe column by means of the existing construction technology, and after the introduction of high-pressure air flow is stopped, the joint can be rotated to dismount the lower joint pipe, and finally the separation between the upper pipe column and the lower pipe column is realized.
The invention provides a petroleum underground safety joint. The method has the following beneficial effects:
1. according to the invention, the pneumatic telescopic component, the pneumatic sand loosening component and the pneumatic plugging component can be driven to operate simultaneously through high-pressure gas, when the joint is trapped due to sand burying, the pneumatic plugging component can release plugging and protecting effects on the pneumatic sand loosening component through the impact of high-pressure gas flow, so that the pneumatic sand loosening component is exposed, meanwhile, the pneumatic telescopic component is used as a conveying structure, the pneumatic sand loosening component can be sent out, so that the pneumatic sand loosening component is contacted with sand, and further, when a drill bit is forced to rotate by the high-pressure gas flow, sand can be drilled and introduced into an inner bin, so that external sand can be loosened due to loss, the trapping effect of the sand on the joint is eliminated, compared with the existing sand washing technology, a large amount of sand is not required to be taken away, and the time for escaping is reduced.
2. The invention takes high-pressure gas as a power source, is different from the existing hydraulic driving mode, does not pollute the environment in a well, and has the advantages of simple equipment and principle, mature technology and low use cost.
Drawings
FIG. 1 is an internal schematic view of the present invention;
FIG. 2 is an enlarged view of FIG. 1 at A;
FIG. 3 is a schematic view of the interior of the inner chamber of the present invention;
FIG. 4 is an enlarged view at B in FIG. 3;
FIG. 5 is a schematic view of a pneumatic retracting assembly and a pneumatic sand loosening assembly in the practice of the present invention;
FIG. 6 is an internal schematic view of the structure of FIG. 5;
FIG. 7 is a schematic, broken away view of the structure of FIG. 6;
FIG. 8 is a schematic view of a cartridge of the present invention;
FIG. 9 is a perspective view of the present invention;
FIG. 10 is a schematic view of the inside of the wall of the upper fitting of the present invention;
FIG. 11 is a schematic top view of the present invention;
FIG. 12 is a schematic view of a closure plate, arcuate piston, of the present invention;
FIG. 13 is a schematic view of the inner tube of the present invention;
FIG. 14 is a schematic view of the interior of the inner tube of the present invention.
Wherein, 1, an inner tube; 2. an inner bin; 3. a lower joint pipe; 4. an upper joint pipe; 5. a first through hole; 6. a first compartment; 7. a second compartment; 8. a window; 9. a plugging plate; 10. an arc-shaped piston; 11. an outer trachea; 12. an inner trachea; 13. a bronchus; 14. a circular piston; 15. a trapezoidal wedge block; 16. a guide rail; 17. a carriage; 18. an action cylinder; 19. a spring reset bin; 20. a high pressure pneumatic bin; 21. a sand loosening bin; 22. a drill bit; 23. a second through hole; 24. and (4) exhausting holes.
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 obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Example (b):
as shown in fig. 1 to 14, an embodiment of the present invention provides an oil downhole safety joint, including an inner tube 1, an inner bin 2 is disposed inside the inner tube 1, two narrow sides of the inner bin 2 are correspondingly plugged by side walls of the inner tube 1, a pneumatic telescopic assembly and a pneumatic sand loosening assembly linked therewith are disposed inside the inner bin 2, a lower joint pipe 3 is connected to a lower side of the outer portion of the inner tube 1 through a thread, an upper joint pipe 4 is fixedly connected to an upper side of the outer portion of the inner tube 1, a pneumatic plugging assembly linked with the pneumatic telescopic assembly and the pneumatic sand loosening assembly is disposed inside the upper joint pipe 4, wherein the upper joint pipe 4 and the lower joint pipe 3 are respectively used for connecting an upper tubular column and a lower tubular column which need to be connected.
Specifically, the pneumatic telescopic assembly comprises an inner air pipe 12, short rods are installed on two sides of the inner air pipe 12, the other ends of the short rods are correspondingly installed on the side wall of the inner pipe 1 respectively, further, an outer air pipe 11 is installed on the top of the inner bin 2 and the outer air pipe 11 is communicated with the inside of the inner bin 2, the outer air pipe 11 is sleeved outside the inner air pipe 12, an annular gap is formed between the outer air pipe 11 and the inner air pipe 12, when the pneumatic telescopic assembly is in a trouble-free work, the outer air pipe 11 and the inner air pipe 12 are correspondingly connected with an external sleeve respectively, the combined arrangement form of the external sleeve is consistent with the form between the outer air pipe 11 and the inner air pipe 12, the outer pipe and the inner pipe of the external sleeve are communicated with the outer air pipe 11 and the inner air pipe 12 respectively, wherein the inner air pipe 12 is communicated with a high-pressure air source air outlet and used for introducing high-pressure air flow into the joint, and the annular gap between the outer air pipe 11 and the inner air pipe 12 is used for exhausting high-pressure exhaust gas flow, so as to ensure the balance of the internal air joint.
Specifically, in the pneumatic telescopic assembly, guide rails 16 are further mounted at the bottoms of two sides of the inner air pipe 12, a sliding frame 17 is connected inside the guide rails 16 in a sliding manner, action cylinders 18 are mounted at the bottom of the sliding frame 17, a spring resetting bin 19 is arranged below the inner portion of one end, opposite to the action cylinders 18, of each action cylinder 18, a spring is arranged between the action cylinders 18 on two sides, two ends of each spring are fixedly connected to the inner wall of the corresponding spring resetting bin 19 respectively, a circular piston 14 is connected below the inner portion of the inner air pipe 12 in a sliding manner, another spring is sleeved outside a piston rod at the bottom of the circular piston 14, the bottom end of each piston rod penetrates through the bottom of the inner air pipe 12 and is provided with a trapezoidal wedge 15, cut angles matched with oblique edges on two sides of the trapezoidal wedge 15 are arranged above one end, further, second through holes 23 are formed in the pipe walls on two sides of the inner pipe 1, the inside of the second through holes 23 is matched with the outside of the action cylinders 18, and the axial center lines of the second through holes 23 and the action cylinders 18 are on the same straight line.
Specifically, pneumatic pine sand subassembly includes two drill bits 22, drill bit 22 rotates respectively to be connected in the inside of the section of thick bamboo 18 of action of both sides, wherein, pine sand storehouse 21 has all been seted up to the inside of the section of thick bamboo 18 one end of carrying on the back mutually of the both sides action, be used as the position of getting that bores that holds drill bit 22, high-pressure pneumatic storehouse 20 has all been seted up in the middle of the inside of the section of thick bamboo 18 of action of both sides, the both sides drill bit 22 is located the inside axostylus axostyle department a week of high-pressure pneumatic storehouse 20 and evenly installs a plurality of blades, exhaust hole 24 has been seted up to one side that the top of the section of thick bamboo 18 of action of both sides is located balladeur train 17, both sides exhaust hole 24 corresponds and is linked together with the inside in high-pressure pneumatic storehouse 20, the opposite side that the top of the section of thick bamboo 18 of action of both sides is located balladeur train 17 all installs and communicates there is a hose, the side of trachea 12 including the other port of hose is all installed and is communicated.
Specifically, the second separation cavities 7 are formed in the tube walls on two sides of the upper joint tube 4, the first separation cavities 6 are formed below the second separation cavities 7 in the tube walls on two sides of the upper joint tube 4, the windows 8 are formed in two sides of the upper joint tube 4, the windows 8 on two sides are respectively communicated with the inside of the first separation cavities 6, the inner walls on two sides of the upper joint tube 4 are respectively provided with first through holes 5, the first through holes 5 on two sides are respectively communicated with the inside of the first separation cavities 6, the inside of the first through holes 5 is matched with the outside of the action barrel 18, the axial center lines of the first through holes 5 and the axial center line of the action barrel 18 are on the same straight line, furthermore, the inner walls on two sides of the upper joint tube 4 are respectively provided with branch tubes 13, the outer side ports of the branch tubes 13 on two sides are respectively communicated with the inside of the second separation cavities 7 correspondingly, and the inner side ports of the branch tubes 13 on two sides respectively penetrate through the tube walls on two sides of the inner tube 1 and are installed and communicated with the side faces of the inner tube 12.
Specifically, pneumatic shutoff subassembly includes two shutoff boards 9 and two arc pistons 10, two shutoff boards 9 correspond sliding connection respectively and separate the inside at first chamber 6, be used as shutoff window 8, two arc pistons 10 correspond sliding connection respectively and separate the inside at second chamber 7, it has a pair of direction slide bar to lie in first chamber 6 and the equal sliding connection in adjacent position department that separates chamber 7 with the second in the both sides pipe wall of upper joint pipe 4, the bottom of direction slide bar corresponds respectively and installs the top both sides at shutoff board 9, the top of direction slide bar corresponds respectively and installs the bottom both sides at arc piston 10.
In this embodiment, when the joint is stuck and unable to rotate and get rid of the trouble due to sand burying underground, high pressure air flow can be introduced from the inner air pipe 12, and then part of the high pressure air will flow into the second separating chamber 7 from the branch pipes 13 at both sides, and then will press the arc pistons 10 at both sides to move downwards under the action of continuous pressure, and then the blocking plate 9 in the first separating chamber 6 can be pushed to move downwards by the guide slide bar, so as to release the blocking of the window 8, so that the external sand will be inserted into the first separating chamber 6, and at the same time, part of the high pressure air remaining in the inner air pipe 12 will act on the top of the circular piston 14, so as to push the circular piston 14 to move downwards, and further under the pushing action of the trapezoidal wedge 15, the actuating cylinders 18 at both sides will extend out to both sides under the guiding and limiting action of the guide rails 16 and the sliding frame 17, and enter the first separating chamber 6 through the second through hole 23 and the first through hole 5 to contact with the poured sand, similarly, a part of high-pressure gas retained inside the inner gas pipe 12 will enter the high-pressure pneumatic bin 20 from the hoses on both sides, at this time, the part of high-pressure gas will continuously act on the blades outside the shaft of the drill bit 22, and then the drill bit 22 will be driven to rotate, and the introduced high-pressure gas will discharge from the exhaust hole 24 after driving the drill bit 22 to rotate, and will be discharged out of the joint through the annular gap between the outer gas pipe 11 and the inner gas pipe 12, so as to achieve the balance of gas pressure, and further, since the drilling end of the drill bit 22 has contacted sand when entering the first separation chamber 6 previously, the sand will be drilled during the rotation, the drilled sand will fall into the inner bottom of the inner bin 2 from the opening at the bottom of the sand loosening bin 21, and during the continuous drilling, the external sand will be loosened due to the loss, thereby eliminating the burying effect of the buried sand on the joint, make this joint can rely on pneumatic sand loosening mode to realize getting rid of poverty, and then rely on current construction technique to apply the revolving force to the top tubular column, after stopping high-pressure draught's introduction, can make this joint can rotate in order to lift off lower joint pipe 3, break away from between the tubular column about finally realizing.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. An oil well safety joint down-hole, including inner tube (1), its characterized in that: an inner bin (2) is arranged inside the inner tube (1), two narrow side edges of the inner bin (2) are correspondingly plugged by the side wall of the inner tube (1), a pneumatic telescopic assembly and a pneumatic sand loosening assembly linked with the pneumatic telescopic assembly are arranged inside the inner bin (2), an upper joint pipe (4) is fixedly connected to the upper side of the outer part of the inner tube (1), and a pneumatic plugging assembly linked with the pneumatic telescopic assembly and the pneumatic sand loosening assembly is arranged inside the upper joint pipe (4);
the pneumatic telescopic assembly comprises an inner air pipe (12), short rods are mounted on two sides of the inner air pipe (12), the other ends of the short rods are correspondingly mounted on the side wall of the inner pipe (1) respectively, guide rails (16) are mounted at the bottoms of the two sides of the inner air pipe (12), a sliding frame (17) is connected to the inner portion of each guide rail (16) in a sliding mode, an action cylinder (18) is mounted at the bottom of each sliding frame (17), a spring resetting bin (19) is arranged below the inner portion of one end, opposite to each end, of each action cylinder (18), a spring is arranged between the two sides of each action cylinder (18), two ends of each spring are fixedly connected to the inner wall of the corresponding spring resetting bin (19) respectively, a circular piston (14) is connected to the lower portion of the inner portion of each inner air pipe (12) in a sliding mode, another spring is sleeved outside a piston rod at the bottom of the circular piston rod (14), the bottom end of each piston rod penetrates through the bottom of each inner air pipe (12) and is provided with a trapezoidal wedge block (15), and a chamfer angle matched with oblique edges of the two sides of the trapezoidal wedge blocks (15) is arranged above one end, opposite to each action cylinder (18);
the pneumatic loose sand assembly comprises two drill bits (22), the drill bits (22) are respectively and rotatably connected to the inner parts of the action cylinders (18) at two sides, a loose sand bin (21) is respectively arranged inside one end, back to back, of each action cylinder (18) at two sides and is used as a drilling part for accommodating the drill bits (22), a high-pressure pneumatic bin (20) is respectively arranged in the middle of the inner part of each action cylinder (18) at two sides, a plurality of blades are uniformly arranged on one circle of a shaft rod section, located inside the high-pressure pneumatic bin (20), of each drill bit (22) at two sides, exhaust holes (24) are respectively arranged at one side, located on the sliding frame (17), of the top of each action cylinder (18) at two sides, the exhaust holes (24) are correspondingly communicated with the inner part of the high-pressure pneumatic bin (20), hoses are respectively arranged at the other sides, communicated with the sliding frame (17), the other ports of the hoses are respectively arranged at the side surfaces of the inner air pipes (12), second partition cavities (7) are respectively arranged in the pipe walls of two sides of the upper joint pipe (4), the two sides of the first joint pipe (4) are respectively communicated with through holes (5) at two sides, through holes (6) are respectively arranged on the inner side of the first partition chamber (6), the first through hole (5) and the axial center line of the action barrel (18) are positioned on the same straight line, windows (8) are formed in two sides of the upper joint pipe (4), and the windows (8) in the two sides are respectively communicated with the inside of the first separation cavity (6);
pneumatic shutoff subassembly includes two shutoff boards (9) and two arc piston (10), two shutoff board (9) correspond sliding connection respectively and are being used as shutoff window (8) in the inside of first chamber (6) that separates, two arc piston (10) correspond sliding connection respectively and separate the inside in chamber (7) at the second, it has a pair of direction slide bar to go up the equal sliding connection in adjacent position department that is located first chamber (6) and second and separate chamber (7) in the both sides pipe wall of adapter tube (4), and the bottom of direction slide bar corresponds respectively and installs the top both sides at shutoff board (9), and the top of direction slide bar corresponds respectively and installs the bottom both sides at arc piston (10).
2. A petroleum downhole safety joint according to claim 1, wherein: and the inner walls of the two sides of the upper joint pipe (4) are respectively provided with a bronchus (13), the outer side end ports of the bronchus (13) at the two sides are respectively correspondingly communicated with the inside of the second separation cavity (7), and the inner side end ports of the bronchus (13) at the two sides respectively penetrate through the pipe walls of the two sides of the inner pipe (1) and are respectively communicated with the side surface of the inner air pipe (12).
3. An oil downhole safety joint according to claim 1, wherein: the pipe wall of the two sides of the inner pipe (1) is provided with a second through hole (23), the inside of the second through hole (23) is matched with the outside of the action cylinder (18), and the axial center line of the second through hole (23) and the axial center line of the action cylinder (18) are on the same straight line.
4. A petroleum downhole safety joint according to claim 1, wherein: the top in interior storehouse (2) is installed outer trachea (11) just outer trachea (11) are linked together with the inside in interior storehouse (2), outer trachea (11) cover in the outside of trachea (12) just be formed with annular clearance between outer trachea (11) and interior trachea (12).
5. An oil downhole safety joint according to claim 1, wherein: the outer lower side of the inner pipe (1) is in threaded connection with a lower joint pipe (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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|---|---|
| CN115075745A (en) | 2022-09-20 |
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