CN115075745A - Oil is safety joint in pit - Google Patents
Oil is safety joint in pit Download PDFInfo
- Publication number
- CN115075745A CN115075745A CN202211010214.8A CN202211010214A CN115075745A CN 115075745 A CN115075745 A CN 115075745A CN 202211010214 A CN202211010214 A CN 202211010214A CN 115075745 A CN115075745 A CN 115075745A
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- Prior art keywords
- sides
- pipe
- pneumatic
- action
- sand
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- 239000004576 sand Substances 0.000 claims abstract description 58
- 230000009471 action Effects 0.000 claims description 46
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 14
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 14
- 241001330002 Bambuseae Species 0.000 claims description 14
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 14
- 239000011425 bamboo Substances 0.000 claims description 14
- 238000000926 separation method Methods 0.000 claims description 13
- 210000000621 bronchi Anatomy 0.000 claims description 10
- 210000003437 trachea Anatomy 0.000 claims description 10
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 abstract description 10
- 235000011613 Pinus brutia Nutrition 0.000 abstract description 10
- 241000018646 Pinus brutia Species 0.000 abstract description 10
- 239000003208 petroleum Substances 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 36
- 238000010276 construction Methods 0.000 description 4
- 238000005553 drilling Methods 0.000 description 4
- 238000011010 flushing procedure 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
- 238000000034 method Methods 0.000 description 3
- 238000005406 washing Methods 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
- 239000003129 oil well Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 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
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/06—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 achieve 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 component comprises an inner air pipe, short rods are arranged on two sides of the inner air pipe, the other ends of the short rods are respectively and correspondingly arranged on the side wall of the inner pipe, the bottoms of the two sides of the inner air pipe are respectively provided with a guide rail, the inner parts of the guide rails are respectively connected with a sliding frame in a sliding way, the bottom of the sliding frame is provided with an action cylinder, the lower part of the inner part of one end of the action cylinder opposite to the action cylinder is provided with a spring reset bin, a spring is arranged between the action cylinders at two sides, and the two ends of the spring are respectively and fixedly connected with the inner wall of the spring reset bin, a round piston is connected to the lower part of the inner air pipe in a sliding way, another spring is sleeved outside a piston rod at the bottom of the round 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 chamfer matched with the inclined sides at the two sides of the trapezoidal wedge block is arranged above the opposite end of the action cylinders at 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;
pneumatic shutoff subassembly includes two shutoff boards and two arc pistons, two the shutoff board corresponds sliding connection respectively and separates the inside in chamber first, as the shutoff window, two arc pistons correspond sliding connection respectively and separate the inside in chamber at the second, it has a pair of direction slide bar to lie in the equal sliding connection in first chamber and the second adjacent position department that separates the chamber to go up the both sides pipe wall of joint pipe, and the bottom of direction slide bar corresponds the top both sides of installing at the shutoff board respectively, and the top of direction slide bar corresponds the bottom both sides of installing at arc piston respectively.
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, the upper joint pipe and the 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 sleeve, the combination form of the external sleeve 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 sleeve 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, and 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 gas pressure balance of the joint, when the joint is trapped and can not 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 part of the high-pressure gas can flow into the second separation chamber from the branch gas pipes at both sides, and then the arc pistons at both sides can be pressed to move downwards under the continuous pressure, and then the plugging plate in the first separation chamber can be pushed to move downwards through the guide slide bar, therefore, the plugging to the window is removed, the external 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, and 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 enter the high-pressure pneumatic bin from 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 is discharged out of the joint through the annular gap between the outer gas pipe and the inner gas pipe, thereby realize the balance of atmospheric pressure, and then the end of getting into of drill bit contacts the sand because before when getting into first separate chamber in, so when its is rotatory, will get into the sand, the sand of getting into will fall into the inside bottom in interior storehouse from the trompil of pine sand storehouse bottom, thereby when continuously drilling, outside sand will be not hard up because of running off production, thereby it buries the stranded effect to burying of this joint to have solved, make this joint can rely on pneumatic pine sand mode to realize getting rid of poverty, and then rely on current construction technology to apply the revolving force to the top tubular column, after stopping the introduction of high-pressure draught, can make this joint can rotate in order to lift off the lower joint pipe, finally realize breaking away from between the upper and lower tubular column.
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 by high-pressure gas, when the joint is trapped by sand burying, the pneumatic plugging component can relieve 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 the drill bit is forced to rotate by the high-pressure gas flow, the sand can be drilled and introduced into the inner bin, so that the external sand can be loosened due to loss, the trapping effect of the sand on the joint is relieved.
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 taken at A in FIG. 1;
FIG. 3 is a schematic view of the interior of the inner bin 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 the actuator 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 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.
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 arranged on two sides of the inner air pipe 12, the other ends of the short rods are respectively and correspondingly arranged on the side wall of the inner pipe 1, further, an outer air pipe 11 is arranged on the top of the inner bin 2, 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 escape operation, the outer air pipe 11 and the inner air pipe 12 are respectively and correspondingly connected with an external sleeve, the combination 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 respectively communicated with the outer air pipe 11 and the inner air pipe 12, wherein the inner air pipe 12 is communicated with a high-pressure air source air outlet 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 waste gas flow, so as to ensure the internal air pressure balance of the joint.
Specifically, in the pneumatic telescopic assembly, guide rails 16 are further mounted at the bottoms of two sides of the inner air tube 12, a sliding frame 17 is slidably connected inside each guide rail 16, action cylinders 18 are mounted at the bottoms of the sliding frames 17, a spring reset bin 19 is disposed below the inner portion of one end, opposite to the action cylinders 18, of each action cylinder 18, a spring is disposed between the action cylinders 18 on two sides, two ends of each spring are fixedly connected to the inner wall of the spring reset bin 19 respectively, a circular piston 14 is slidably connected below the inner portion of the inner air tube 12, another spring is sleeved outside a piston rod at the bottom of the circular piston 14, the bottom end of the piston rod penetrates through the bottom of the inner air tube 12 and is provided with a trapezoidal wedge block 15, cut angles matched with oblique edges on two sides of the trapezoidal wedge block 15 are disposed above one end, opposite to the action cylinders 18 on two sides, further, second through holes 23 are formed in the tube walls on two sides of the inner tube 1, the inside of the second through holes 23 is matched with the outside the action cylinders 18, and the second through hole 23 is aligned with the axial center line of the cylinder 18.
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 tube walls at two sides of the upper joint tube 4 are both provided with a second separating chamber 7, the tube walls at two sides of the upper joint tube 4 are both provided with a first separating chamber 6 below the second separating chamber 7, the two sides of the upper joint tube 4 are both provided with windows 8, the windows 8 at two sides are respectively communicated with the inside of the first separating chamber 6, the inner walls at two sides of the upper joint tube 4 are both provided with first through holes 5, the first through holes 5 at two sides are respectively communicated with the inside of the first separating chamber 6, the inside of the first through holes 5 is matched with the outside of the action cylinder 18, and the first through hole 5 and the axial center line of the action cylinder 18 are on the same straight line, furthermore, the inner walls of the two sides of the upper joint pipe 4 are both provided with a bronchus 13, the outer side end ports of the bronchus 13 of 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 of the two sides respectively penetrate through the pipe walls of the two sides of the inner pipe 1 and are arranged and communicated with the side surface of the inner pipe 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 trapped by sand burying underground and cannot be rotated to get rid of the sand, high pressure air flow can be introduced from the inner air pipe 12, and then part of the high pressure air flows into the second separating chamber 7 from the branch air pipes 13 at two sides, and then the arc pistons 10 at two sides are pressed 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 through the guide slide bar, so that the blocking of the window 8 is released, so that the external sand is inserted into the first separating chamber 6, and simultaneously part of the high pressure air retained in the inner air pipe 12 can 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 action cylinders 18 at two sides extend towards two sides under the guiding and limiting actions of the guide rail 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 injected 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 technology 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 clutch collar 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 (6)
1. An oil downhole safety joint, comprising an inner pipe (1), 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 installed on two sides of the inner air pipe (12), the other ends of the short rods are respectively and correspondingly installed on the side wall of the inner pipe (1), guide rails (16) are installed at the bottoms of two sides of the inner air pipe (12), a sliding frame (17) is connected inside each guide rail (16) in a sliding mode, an action cylinder (18) is installed 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 respectively and fixedly connected to the inner wall of the corresponding spring resetting bin (19), a circular piston (14) is connected below the inner portion of the inner air pipe (12) in a sliding mode, 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 block (15), the upper parts of the opposite ends of the action cylinders (18) at the two sides are respectively provided with a cutting angle matched with the inclined sides at the two sides of the trapezoidal wedge block (15);
the pneumatic sand loosening assembly comprises two drill bits (22), the drill bits (22) are respectively and rotatably connected with the insides of the action cylinders (18) at two sides, wherein, both sides loose sand storehouse (21) have all been seted up to the inside of the back of the body one end of an action section of thick bamboo (18), and the position is got as the brill that holds drill bit (22), both sides high-pressure pneumatic storehouse (20) have all been seted up in the middle of the inside of an action section of thick bamboo (18), both sides drill bit (22) are located the inside axostylus axostyle section department a week of high-pressure pneumatic storehouse (20) and evenly install a plurality of blades, both sides the top of an action section of thick bamboo (18) is located one side of balladeur train (17) and has seted up exhaust hole (24), both sides exhaust hole (24) correspond and be linked together with the inside of high-pressure pneumatic storehouse (20), both sides the opposite side that the top of an action section of thick bamboo (18) is located balladeur train (17) all installs and communicates there is a hose, and the side of trachea (12) is including other port of hose is all installed and communicates.
2. An oil downhole safety joint according to claim 1, wherein: the pipe walls of two sides of the upper joint pipe (4) are internally provided with second separating cavities (7), the pipe walls of two sides of the upper joint pipe (4) are positioned below the second separating cavities (7) and are respectively provided with first separating cavities (6), the inner walls of two sides of the upper joint pipe (4) are respectively provided with first through holes (5), the first through holes (5) of two sides are respectively communicated with the inside of the first separating 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 action barrel (18) are positioned on the same straight line, two sides of the upper joint pipe (4) are respectively provided with windows (8), and the windows (8) of two sides are respectively communicated with the inside of the first separating cavities (6);
pneumatic shutoff subassembly includes two shutoff boards (9) and two arc piston (10), two shutoff board (9) correspond sliding connection respectively and separate the inside in chamber (6) at first, be used as shutoff window (8), 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 the both sides pipe wall that is located first chamber (6) and second and separate chamber (7) adjacent position department of joint pipe (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).
3. An oil downhole safety joint according to claim 2, wherein: bronchus (13) is installed on the inner walls of two sides of the upper joint pipe (4), the outer side end ports of the bronchus (13) on two sides are respectively communicated with the inside of the second separation cavity (7) correspondingly, and the inner side end ports of the bronchus (13) on two sides respectively penetrate through the pipe walls of two sides of the inner pipe (1) and are installed and communicated with the side surface of the inner pipe (12).
4. An oil downhole safety joint according to claim 1, wherein: the inner tube (1) is characterized in that second through holes (23) are formed in the tube walls of the two sides of the inner tube (1), the inner portions of the second through holes (23) are matched with the outer portions of the action cylinders (18), and the second through holes (23) and the axial center lines of the action cylinders (18) are located on the same straight line.
5. An oil 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).
6. 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).
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|---|---|
| CN115075745B (en) | 2022-12-16 |
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