CN111622720B - Blowout prevention tool in rod-throwing detonation perforation oil pipe - Google Patents
Blowout prevention tool in rod-throwing detonation perforation oil pipe Download PDFInfo
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- CN111622720B CN111622720B CN202010659788.2A CN202010659788A CN111622720B CN 111622720 B CN111622720 B CN 111622720B CN 202010659788 A CN202010659788 A CN 202010659788A CN 111622720 B CN111622720 B CN 111622720B
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- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/116—Gun or shaped-charge perforators
- E21B43/1185—Ignition systems
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- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
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- 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
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- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/116—Gun or shaped-charge perforators
- E21B43/1185—Ignition systems
- E21B43/11855—Ignition systems mechanically actuated, e.g. by movement of a wireline or a drop-bar
Abstract
The invention belongs to the field of downhole tools of oil fields, and particularly relates to a blowout prevention tool in a stick-throwing detonation perforating oil pipe, which comprises a blowout prevention working barrel and a stick-throwing device, wherein the blowout prevention working barrel comprises a sealing joint, a sealing ring for sealing the stick-throwing device and a sealing joint annular cavity after the stick-throwing device penetrates through the sealing joint is fixedly arranged in the sealing joint, and an inwards-concave annular clamping groove is processed on the inner side of the sealing joint above the sealing ring; the rod throwing comprises a rod throwing upper section and a rod throwing lower section; a clamping block is arranged on the lower section of the throwing rod and clamped in the annular clamping groove, so that the effects of locking the throwing rod and preventing blowout are achieved; the upper section of the throwing rod comprises a reaction section, the reaction section comprises two cavities for respectively containing a solid reactant and a liquid reactant, a valve communicated with the two reaction cavities is opened at a specified distance from the initiator, so that the liquid and solid reactants generate violent chemical reaction and generate a large amount of gas, the counter thrust of the gas provides the throwing rod with increased advancing power, the advancing impulse of the throwing rod is improved, and the success rate of primary initiation is improved.
Description
Technical Field
The invention belongs to the field of oil field downhole tools, and particularly relates to a blowout prevention tool in a throwing detonation perforation oil pipe.
Background
In the perforation operation process of an oil-gas well, the rod throwing unlocking pressure detonation is a common detonation mode, the detonation mode refers to that a rod throwing is thrown down from a well mouth, the rod throwing falls under the action of self gravity, the resistance of well liquid is overcome in the falling process, and finally a firing pin of a mechanical detonation device connected to the lower end of a pipe string is impacted to complete perforation operation.
In order to smoothly throw the rod, the conventional oil pipe conveying type perforation is full in diameter from a well head to a detonator, and the blowout prevention problem of the perforated oil pipe can not be well solved all the time due to the fact that the formation pressure is high after perforation, so that the hidden danger of blowout exists in perforation operation. In addition, in order to prevent the accidental detonation of the detonator, the detonation impact force of the firing pin needs to be improved, so that the success rate of primary detonation of the throwing rod is low, the throwing rod needs to be fished for the second time, and the operation time and the operation cost are increased.
Disclosure of Invention
In order to solve the problems of blowout prevention of a perforating oil pipe and low success rate of rod throwing detonation in the background technology, the invention provides the blowout prevention tool in the perforating oil pipe for rod throwing detonation.
The technical scheme provided by the invention is as follows: a blowout prevention tool in a throwing detonation perforation oil pipe comprises a blowout prevention working barrel and a throwing rod;
the blowout prevention working barrel comprises a sealing joint, a sieve tube and a lower joint which are sequentially in threaded connection from top to bottom, a sealing ring which seals a throwing rod and a sealing joint ring cavity after the throwing rod penetrates through is fixedly installed in the sealing joint, and an inward concave ring-shaped clamping groove is processed on the inner side of the sealing joint above the sealing ring; the rod throwing device comprises a rod throwing upper section, a rod throwing lower section and a rod throwing head, wherein the rod throwing upper section and the rod throwing lower section are in threaded connection; the lower section of the throwing rod comprises an expansion joint, a joint seat, a fixture block mounting section and an impact rod, wherein the expansion joint is inserted at the upper part of the joint seat in a clearance manner, the side wall of the joint seat is provided with a long hole, the side wall of the expansion joint is connected with a radial screw, the radial screw slides in the long hole, a pull rod is inserted in the expansion joint, the upper end of the pull rod is provided with a pull rod cap which is clamped in the expansion joint so as to go up along with the expansion joint, the fixture block mounting section is in threaded connection with the lower end of the joint seat, the side wall of the lower part of the fixture block mounting section is provided with a long hole, two fixture blocks which are centrosymmetric relative to the axis of the fixture block mounting section are connected in the long hole through a pin shaft, the free end of each fixture block can extend out of the outer side of the corresponding fixture block mounting section and is clamped in an annular, the pull rod extends downwards to penetrate through a central hole of the fixture block mounting joint, the central hole corresponding to the fixture block is an expanding section, a reset short section is screwed on the outer side of the pull rod of the section and is abutted against the inner side of the fixture block, the fixture block abutted against the side comprises an arc edge positioned above and a linear edge positioned below, the circle center of the arc edge is superposed with the axis of the pin shaft, a reset spring is sleeved on the outer side of the pull rod between the reset short section and the joint seat, an axial air supply hole is formed in the center of the pull rod, the impact rod is in threaded connection with the lower end of the fixture block mounting joint, an air storage cavity is formed in the upper end of the impact rod, an impact channel is formed in the lower end of the impact rod, the air supply hole, the air storage cavity and the impact channel are communicated, a;
the upper section of the throwing rod comprises an upper righting section, a reaction section and a lower righting section, the upper righting section and the lower righting section are sequentially in threaded connection from top to bottom, righting roller sets are respectively installed on the upper righting section and the lower righting section, open cavities are respectively processed at two ends of the reaction section, a communicating hole is formed between the two open cavities, a valve rod which is perpendicular to the axis direction of the communicating hole and is used for cutting off and communicating is inserted in the reaction section, an annular groove is processed on the valve rod, a strong magnetic nut is in threaded connection with one end of the valve rod, a central pipe is inserted in the upper open cavity, an annular space is reserved between the central pipe and the inner wall of the upper open cavity, a solid reactant is placed in the central pipe, a pneumatic piston is inserted in the central pipe above the solid reactant in a sliding sealing manner, the pneumatic piston is provided with an axial blind hole and a radial through hole, the axial blind hole, the side wall of the upper open cavity is provided with an oblique upward fumarole, the lower open cavity is provided with an expanding section, the expanding section is positioned at the lower part, a separating plug is inserted in the expanding section in a sliding and sealing manner, the cavities at the two sides of the separating plug are filled with liquid reactants, the inner side of the upper end of the lower centering joint is provided with a solid reactant, the reaction joint is connected with the lower centering joint through a connector, the connector is provided with an axial communicating hole, the connector is inserted with a valve rod which is perpendicular to the axial direction of the communicating hole and is cut off and communicated, an annular groove is formed in the valve rod, one end of the valve rod is in threaded connection with a strong magnetic nut, the lower centering joint is provided with a central through hole, the lower end of the lower centering joint is connected with a telescopic joint of the lower section of the; in the blowout prevention tool in the throwing rod detonation perforating oil pipe, parts except the strong magnetic nut are all made of non-magnetic or weak magnetic metal materials.
Furthermore, the centralizing roller group comprises four rollers which are uniformly distributed in four directions, wheel carriers are arranged at two ends of a wheel shaft of each roller, a centralizing section is provided with an insertion hole for the wheel carriers to be inserted in a sliding manner, an ejection spring is arranged in the insertion hole, the wheel carriers are provided with slideways, axial pins are installed on the centralizing section, and the tail ends of the pins are located in the slideways.
Furthermore, the solid reactant is arranged on a hub-shaped metal frame to form a blocky solid reaction block, the solid reaction block is provided with an axial vent hole, and a spacer ring is arranged between adjacent solid reaction blocks.
Furthermore, a check valve section is connected above the sealing section, and a check valve capable of discharging liquid from inside to outside is installed on the side wall of the check valve section.
The invention has the beneficial effects that:
(1) a sealing ring is fixedly arranged in the blowout prevention working barrel, and a well fluid passage in an oil pipe is sealed after a throwing rod penetrates through the sealing ring and is locked; in order to prevent the rod from being ejected upwards under the bottom hole pressure, a clamping mechanism consisting of a clamping groove, a clamping block, a pull rod and a return spring is arranged between the rod and the blowout prevention barrel, the clamping mechanism can solve the clamping problem, can be unlocked and lifted during fishing, and meets the requirements of two purposes of clamping, blowout prevention and fishing.
(2) The reaction section is internally provided with a solid reactant and a liquid reactant, a valve for communicating the solid reactant and the liquid reactant can be opened at a set position, the solid reactant and the liquid reactant are contacted and generate violent chemical reaction to generate a large amount of gas, the gas pushes the throwing rod to advance in a reverse mode, the impact speed and the impulse quantity of the throwing rod are improved, and therefore the success rate of primary detonation is improved.
(3) When the blasting rod accelerated by gas reverse thrust still fails to detonate the initiator, in order to further improve the success rate of primary detonation, the center of the impact rod is provided with an impact channel, a pneumatic rod is slidably inserted in the impact channel, after the air pressure is increased to a set value, a shear pin connected with the pneumatic rod is sheared off, the pneumatic rod which is not bound is rapidly ejected under the action of gas power and impacts on a firing pin of the initiator, and the initiator is detonated.
(4) The invention can realize well washing through the check valve under the state that the perforating gun is not lifted out. When the pipe column and the detonator are lifted upwards, the check valve is automatically opened under the gravity of the well fluid, so that the well fluid automatically flows back into the sleeve. The well liquid in the lifted pipe column can not be taken out of the well mouth, so that the field can not be polluted, and the environment-friendly function is realized.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic structural view of a blowout preventer mandrel according to the present invention.
FIG. 3 is a schematic structural view of the lower section of the casting rod of the present invention.
Fig. 4 is a schematic view of the lower section of the throw bar of the present invention positioned within a blowout preventer mandrel.
FIG. 5 is a schematic structural view of the upper section of the casting rod of the present invention.
FIG. 6 is a schematic view of a part of the structure of the upper section of the casting rod of the present invention.
FIG. 7 is a schematic view of the structure of the solid reaction block of the present invention.
Fig. 8 is a schematic structural view of the centralizing roller group in the invention.
In the figure: 1-check valve section, 2-check valve, 3-seal section, 4-ring groove, 5-seal ring, 6-screen pipe, 7-lower joint, 8-expansion joint, 9-air supply hole, 10-joint seat, 11-pull rod, 12-fixture block mounting section, 13-return spring, 14-return short section, 15-fixture block, 16-impact rod, 17-pneumatic rod, 18-impact channel, 19-roller, 20-upper centering section, 21-pneumatic piston, 22-central tube, 23-solid reaction block, 24-spacer ring, 25-strong magnetic nut, 26-reaction section, 27-liquid reactant, 28-spacer plug, 29-lower centering section, 30-valve rod, 31-air injection hole, 32-wheel carrier, 33-slideway, 34-pin, 35-ejection spring, 36-plug hole, 37-central through hole, 38-shear pin and 39-gas storage cavity.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.
The invention comprises a blowout-preventing working barrel and a throwing rod, wherein the upper end of the blowout-preventing working barrel is connected with a perforation oil pipe, and the lower end of the blowout-preventing working barrel is connected with a perforating gun detonator.
As shown in fig. 2, the blowout prevention working barrel comprises a sealing joint 3, a sieve tube 6 and a lower joint 7 which are sequentially in threaded connection from top to bottom, a sealing ring 5 which seals the throwing rod and the annular space (well fluid passage) of the sealing joint 3 after the throwing rod penetrates is fixedly installed in the sealing joint 3, an inward-concave annular clamping groove 4 is machined on the inner side of the sealing joint 3 above the sealing ring 5, and the throwing rod can be clamped and locked by the annular clamping groove 4, so that the blowout prevention problem of the oil tube after perforation is solved.
The rod throwing device comprises a rod throwing upper section and a rod throwing lower section which are in threaded connection.
As shown in fig. 3, the lower section of the throwing rod comprises an expansion joint 8, a joint seat 10, a fixture block mounting section 12 and a striking rod 16, the expansion joint 8 is inserted in the upper part of the joint seat 10 in a clearance manner, a long hole is formed in the side wall of the joint seat 10, a radial screw is connected to the side wall of the expansion joint 8, and the radial screw slides in the long hole, so that the expansion joint 8 can slide in the length range of the long hole relative to the joint seat 10.
A pull rod 11 is inserted in the expansion joint 8, a pull rod cap is arranged at the upper end of the pull rod 11, the pull rod cap is clamped in the expansion joint 8 so as to move upwards along with the expansion joint 8, a fixture block mounting joint 12 is in threaded connection with the lower end of a joint seat 10, a long hole is formed in the side wall of the lower part of the fixture block mounting joint 12, two fixture blocks 15 which are in central symmetry relative to the axis of the fixture block mounting joint 12 are connected in the long hole through a pin shaft, as shown in fig. 4, the free ends of the fixture blocks 15 can extend out of the outer sides of the fixture block mounting joints 12 and are clamped in annular clamp grooves 4 of the sealing joints 2, a torsion spring is arranged at the joint of the pin shaft, the free ends of the fixture blocks 15 have a downward rotating trend under the torsion force of the torsion spring, a hole is formed in the center of the fixture block mounting joints 12, the pull rod 11 extends downwards and penetrates through the center hole corresponding to the, the clamping block 15 on the abutting side comprises an arc edge positioned above and a straight edge positioned below, the circle center of the arc edge is overlapped with the axis of the pin shaft, and the clamping block 15 can only rotate upwards and cannot rotate downwards due to the abutting of the reset nipple 14; the clamping block 15 rotates upwards and then has a downward rotation trend under the action of torsion force of the torsion spring, when the clamping block 15 moves downwards and meets resistance, the clamping block 15 can rotate upwards so as to smoothly pass through the resistance meeting section, and when the clamping block 15 reaches the annular clamping groove 4, the annular clamping groove 4 locks the clamping block 15 upwards so as to limit the upward ejection of a throwing rod by bottom hole pressure.
A return spring 13 is sleeved outside the pull rod 11 between the return nipple 14 and the joint seat 10. In a normal state, the reset spring 13 enables the reset short section 14 to have a state of being far away from the joint seat 10, the reset short section 14 is enabled to be always abutted against the inner side of the clamping block 15, the clamping block 15 is ensured to be in a state shown in fig. 3, when a rod is salvaged, lifted and thrown, the telescopic joint 8 pulls the pull rod 11 to move upwards, the reset short section 14 moves upwards to compress the reset spring 13, after the reset short section 14 moves upwards until the reset short section is not in contact with the clamping block 15, the clamping block 15 is received inside the clamping block installation section 12 in downward rotation under the torsion action of the torsion spring, and therefore clamping lock between the annular clamping groove 4.
The center of the pull rod 11 is provided with an axial air supply hole 9, the impact rod 16 is in threaded connection with the lower end of the fixture block mounting joint 12, the upper end of the impact rod 16 is provided with an air storage cavity 39, the lower end of the impact rod 16 is provided with an impact channel 18, the air supply hole 9, the air storage cavity 39 and the impact channel 18 are communicated, a pneumatic rod 17 is inserted in the impact channel 18 in a sliding sealing mode, and the pneumatic rod 17 is connected with the impact rod 16 through a shear pin 38; the gas generated by the chemical reaction reaches the gas storage cavity 39 through the gas supply hole 9, is gathered in the gas storage cavity 39, and when the gas pressure reaches a set value (the set value is related to the gas generation speed and the reaction time; the gas generation speed can be obtained through experiments; the reaction time is the average advancing speed of the throwing stick under the action of the distance between the strong magnetic short circuit and the initiator/reverse thrust, namely the arrival time of the gas pressure set value is determined to be after the throwing stick is impacted), the shear pin 38 connected with the pneumatic rod 17 is sheared, and the pneumatic rod 17 which is not bound is rapidly impacted and impacted on the firing pin of the initiator under the action of the gas power, so that the initiator is detonated. Therefore, when the blasting rod after gas reverse acceleration still cannot explode the initiator, in order to further improve the primary explosion success rate, the pneumatic rod 17 for secondary injection impact is arranged in the center of the impact rod 16.
As shown in fig. 5, the upper section of the throwing rod comprises an upper righting section 20, a reaction section 26 and a lower righting section 29, which are sequentially in threaded connection from top to bottom, and the upper and lower righting sections 20 and 29 are respectively provided with a righting roller set, which can reduce the friction between the throwing rod and the wall of the perforation tubing during the falling process, keep the throwing rod in a central position, and improve the accuracy of impact. As shown in fig. 8, the centralizing roller group comprises four rollers 19 uniformly distributed in four directions, wheel carriers 32 are arranged at two ends of a wheel shaft of each roller 19, a centralizing joint is provided with an insertion hole 36 for the wheel carriers 32 to be inserted in a sliding manner, an ejection spring 35 is arranged in the insertion hole 36, when a deformation section of the underground oil pipe is met, the rod throwing is enabled to pass through the narrowing section smoothly through the contraction of the wheel carriers 32 in the insertion hole 36, the wheel carriers 32 are provided with slide ways 33, the centralizing joint is provided with axial pins 34, and the tail ends of the pins 34 are located in the slide ways 33 so as to limit the wheel carriers 32 not to be separated from the insertion holes. This design has three advantages: firstly, the roller 19 always abuts against the inner wall of the perforation oil pipe and generates rolling friction with the inner wall of the perforation oil pipe, so that the impact quantity is reduced by collision with the perforation oil pipe in the dropping process of a cast rod; secondly, the friction loss of rolling friction is much smaller than sliding friction; and finally, the centering effect is good, and the accuracy of impact can be improved.
The solid reactant and the liquid reactant in the present invention are widely selected, and may be hydrogen oxide solution and manganese dioxide, or hydrochloric acid and calcium carbonate, etc.
The lower centering joint 29 is provided with a central through hole 37, the lower end of the lower centering joint 29 is connected with the telescopic joint 8 of the lower section of the throwing rod, and the central through hole 37 of the lower centering joint 29 is in sealed communication with the gas supply hole 9 of the pull rod 11; due to the position restriction of the upward sliding of the stopper 28, the generated gas flows downward through the central through hole 37 and the gas supply hole 9 and is finally collected in the gas storage chamber 39.
In the blowout preventer tool in the rod-throwing initiation perforating oil pipe, parts except the strong magnetic nut 25 are made of non-magnetic or weak magnetic metal materials, such as: non-magnetic steels 50Mn18Cr3, 50Mn18Cr5, etc., and the spring in the present invention may be replaced by elastic rubber.
As shown in fig. 7, the solid reactant is mounted on a hub-shaped metal frame to form a block-shaped solid reaction block 23, the solid reaction block 23 is provided with an axial vent hole for gas to pass through, a spacer ring 24 is mounted between adjacent solid reaction blocks 23, a liquid guide tube is inserted into the vent hole, the liquid guide tube passes through the center of each hub shape, and the side wall of the liquid guide tube corresponding to each spacer ring 24 section is provided with an opening, so that liquid and solid contact in the reaction process is more sufficient and more uniform, the reaction is quicker, and the amount of gas generated in a short time is more.
The upper part of the sealing joint 3 is connected with a check valve joint 1, the side wall of the check valve joint 1 is provided with a check valve 2 which can discharge liquid from inside to outside, and an oil pipe well liquid channel below the check valve joint 3 is blocked, so the well washing device can realize well washing through the check valve 2 under the state that a perforating gun is not lifted.
When the pipe column and the detonator are lifted upwards, the check valve 2 is automatically opened under the gravity of the well fluid, so that the well fluid automatically flows back into the sleeve. The well liquid in the lifted pipe column can not be taken out of the well mouth, so that the field can not be polluted, and the environment-friendly function is realized.
Claims (4)
1. The utility model provides a blowout prevention instrument in stick blasting perforation oil pipe which characterized in that: comprises a blowout prevention working barrel and a throwing rod;
the blowout prevention working barrel comprises a sealing joint (3), a sieve tube (6) and a lower joint (7), wherein the sealing joint (3), the sieve tube and the lower joint are sequentially in threaded connection from top to bottom, a sealing ring (5) for sealing an annular cavity between a throwing rod and the sealing joint (3) after the throwing rod penetrates through is fixedly installed in the sealing joint (3), and an inwards concave annular clamping groove (4) is machined in the inner side of the sealing joint (3) above the sealing ring (5);
the rod throwing device comprises a rod throwing upper section and a rod throwing lower section which are in threaded connection;
the lower section of the throwing rod comprises an expansion joint (8), a joint seat (10), a fixture block mounting section (12) and an impact rod (16), the expansion joint (8) is inserted at the upper part of the joint seat (10) in a clearance manner, the side wall of the joint seat (10) is provided with a long hole, the side wall of the expansion joint (8) is connected with a radial screw, the radial screw slides in the long hole, a pull rod (11) is inserted in the expansion joint (8), the upper end of the pull rod (11) is provided with a pull rod cap which is clamped in the expansion joint (8) so as to ascend along with the expansion joint (8), the fixture block mounting section (12) is in threaded connection with the lower end of the joint seat (10), the side wall of the lower part of the fixture block mounting section (12) is provided with a long hole, the long hole is internally connected with two fixture blocks (15) which are centrosymmetric relative to the axis of the fixture block mounting section (12) through a pin shaft, the free end of each fixture block (15) can extend, the free end of the fixture block (15) has a downward rotating trend under the action of torsional force of the torsional spring, the center of the fixture block mounting joint (12) is provided with a hole, the pull rod (11) extends downwards to penetrate through the center hole of the fixture block mounting joint (12), the center hole corresponding to the fixture block (15) is an expanding section, the outer side of the pull rod (11) of the section is screwed with a reset short section (14), the reset short section (14) is abutted against the inner side of the fixture block (15), the fixture block (15) at the abutted side comprises an arc edge positioned above and a straight line edge positioned below, the circle center of the arc edge is superposed with the axis of the pin shaft, a reset spring (13) is sleeved on the outer side of the pull rod (11) between the reset short section (14) and the joint seat (10), the center of the pull rod (11) is provided with an axial air supply hole (9), and the impact rod (16) is in threaded connection, the upper end of the impact rod (16) is provided with a gas storage cavity (39), the lower end of the impact rod (16) is provided with an impact channel (18), the gas supply hole (9), the gas storage cavity (39) and the impact channel (18) are communicated, a pneumatic rod (17) is inserted in the impact channel (18) in a sliding sealing mode, and the pneumatic rod (17) is connected with the impact rod (16) through a shear pin (38);
the upper section of the throwing rod comprises an upper righting section (20), a reaction section (26) and a lower righting section (29), the three are sequentially in threaded connection from top to bottom, righting roller groups are respectively installed on the upper righting section (20) and the lower righting section (29), open cavities are respectively processed at two ends of the reaction section (26), communicating holes are formed between the two open cavities, a valve rod (30) which is perpendicular to the axis direction of the communicating holes and is cut off and communicated is inserted in the reaction section (26), an annular groove is processed on the valve rod (30), a strong magnetic nut (25) is in threaded connection with one end of the valve rod (30), a central pipe (22) is inserted in the upper open cavity, an annular space is reserved between the central pipe (22) and the inner wall of the upper open cavity, a solid reactant is placed in the central pipe (22) above the solid reactant, a pneumatic piston (21) is inserted in the central pipe (22) in a sealing manner, and the pneumatic piston (21) is, the axial blind hole and the radial through hole are communicated to form a gas passage, the side wall of a central tube (22) above a pneumatic piston (21) is provided with a gas passing hole for passing gas to an annular space, the side wall of an upper open cavity is provided with an oblique upward gas jet hole (31), a lower open cavity is provided with an expanding section, the expanding section is positioned at the lower part, a separating plug (28) is inserted in the expanding section in a sliding sealing manner, the cavities at the two sides of the separating plug (28) are filled with liquid reactants (27), the inner side of the upper end of a lower righting joint (29) is provided with the solid reactants, a reaction joint (26) is connected with the lower righting joint (29) through a connector, the connector is provided with an axial communicating hole, a valve rod (30) which is cut off and communicated with the axis direction of the communicating hole is inserted in the connector, an annular groove is formed on the valve rod (30), one end of the valve rod (30) is, the lower end of the lower righting joint (29) is connected with an expansion joint (8) of the lower rod throwing section, and a central through hole (37) of the lower righting joint (29) is hermetically communicated with an air supply hole (9) of the pull rod (11);
in the blowout prevention tool in the throwing rod detonation perforation oil pipe, parts except the strong magnetic nut (25) are all made of non-magnetic or weak magnetic metal materials.
2. The blowout preventer tool in a shot initiation perforating tubing of claim 1, wherein: the centering roller group comprises four rollers (19) which are uniformly distributed in four directions, wheel carriers (32) are arranged at two ends of a wheel shaft of each roller (19), a centering joint is provided with an insertion hole (36) for the wheel carriers (32) to be inserted in a sliding manner, an ejection spring (35) is arranged in each insertion hole (36), the wheel carriers (32) are provided with slideways (33), the centering joint is provided with axial pins (34), and the tail ends of the pins (34) are located in the slideways (33).
3. The blowout preventer tool in a shot initiation perforating tubing of claim 1, wherein: the solid reactants are arranged on a hub-shaped metal frame to form blocky solid reaction blocks (23), the solid reaction blocks (23) are provided with axial vent holes, and a spacer ring (24) is arranged between every two adjacent solid reaction blocks (23).
4. The blowout preventer tool in a shot initiation perforating tubing of claim 1, wherein: the sealing joint (3) top be connected with single current valve festival (1), but single current valve (2) of interior outward play liquid are installed to single current valve festival (1) lateral wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010659788.2A CN111622720B (en) | 2020-07-10 | 2020-07-10 | Blowout prevention tool in rod-throwing detonation perforation oil pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010659788.2A CN111622720B (en) | 2020-07-10 | 2020-07-10 | Blowout prevention tool in rod-throwing detonation perforation oil pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111622720A CN111622720A (en) | 2020-09-04 |
| CN111622720B true CN111622720B (en) | 2020-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010659788.2A Active CN111622720B (en) | 2020-07-10 | 2020-07-10 | Blowout prevention tool in rod-throwing detonation perforation oil pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4566544A (en) * | 1984-10-29 | 1986-01-28 | Schlumberger Technology Corporation | Firing system for tubing conveyed perforating gun |
| US4693308A (en) * | 1985-12-19 | 1987-09-15 | Halliburton Company | Tubing conveyed perforating safety anchor |
| US8496052B2 (en) * | 2008-12-23 | 2013-07-30 | Magnum Oil Tools International, Ltd. | Bottom set down hole tool |
| CN201843563U (en) * | 2010-05-20 | 2011-05-25 | 西南石油大学 | Mechanical downhole inner and outer integrated blowout preventer |
| US20120006217A1 (en) * | 2010-07-07 | 2012-01-12 | Anderson Otis R | Electronic blast control system for multiple downhole operations |
| US11085242B2 (en) * | 2018-05-30 | 2021-08-10 | Numa Tool Company | Pneumatic drilling with packer slideable along stem drill rod |
| CN109025914B (en) * | 2018-08-09 | 2020-10-09 | 陕西兴元石油科技有限公司 | Perforation ignition system, perforation-test-acidification combined operation tubular column and using method thereof |
| CN210660049U (en) * | 2019-10-18 | 2020-06-02 | 吉林大学 | Secondary crack-making perforating gun for volume fracturing of vertical well of tight reservoir |
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2020
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