CN201620848U - Vertical well orientation multi-pulse increase-benefit perforating device - Google Patents
Vertical well orientation multi-pulse increase-benefit perforating device Download PDFInfo
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- CN201620848U CN201620848U CN2009202454785U CN200920245478U CN201620848U CN 201620848 U CN201620848 U CN 201620848U CN 2009202454785 U CN2009202454785 U CN 2009202454785U CN 200920245478 U CN200920245478 U CN 200920245478U CN 201620848 U CN201620848 U CN 201620848U
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Abstract
The utility model discloses a vertical well orientation multi-pulse increase-benefit perforating device, which is suitable for oil and gas well perforating operation. The device comprises an orientation priming adapter containing an orientation gun head, an orientation key and a priming apparatus, a perforating gun string consisting of a plurality of orientation integral increase-benefit perforating guns connected in series, and a multi-pulse high-energy gas fracturing unit, wherein the orientation key and the priming apparatus are arranged on the orientation gun head, the gun head of the first perforating gun is connected with the lower end of the orientation gun head, the gun tail of the last perforating gun is connected with the multi-pulse high-energy gas fracturing unit, and the axes of perforating bullets in each perforating gun all point to the radial direction of the orientation key. During operation, the upper end of the orientation gun head is connected with an oil pipe. The utility model provides a novel perforating device integrating orientation perforating, integral increase-benefit perforating and multi-pulse high-energy gas fracturing, can perforate the perforating bullets towards the direction with the best permeability, has good width generation capacity, can prevent the closing of formation fracture, and has obvious oil and gas increase effect.
Description
Technical field
The utility model belongs to oil, gas well completion perforating job field, relates generally to a kind of multistage pulses synergistic perforator, and relating in particular to a kind of straight well oriented perforation, integral type synergy perforation and multistage pulses high enegry gas fracturing of collecting is the perforating system of one.
Background technology
For improving the output of oil, gas well, adopted multiple technical measures, the early 1990s begins to adopt High-Energy Gas Fracturing Technology, afterwards, adopts not only synergy perforating technology (but also claiming compound technique of perforating).Because all there is certain defective in these two technology, a kind of new technology that synergy perforation, high enegry gas fracturing and fracturing three are organically combined has appearred again in the recent period.Chinese patent application 200610104468.0 discloses a kind of multistage pulses enhanced perforation equpment in use for oil and gas well, the synergistic perforator that to collect synergy perforation, high enegry gas fracturing, three kinds of construction technologies of fracturing exactly be one.This device is on the basis of adopting sand control percussion primer and synergy perforating gun, by the synergy gun breech, connector and will fire the higher secondary synergy gunpowder of speed and the fast three grades of lower synergy gunpowder of combustion are assembled in the perforation pipe string to the silk connector, adopt the dividing plate Time Delay Squib behind the perforating gun perforation, to postpone a period of time and refire the synergy gunpowder, form a plurality of gaseous-pressure pulses pressure break is carried out on the stratum, the crack is extended, and can carry the rock fracture proppant by the synergy powder gas and enter the formation fracture that presses off, the closure that stops formation fracture, thereby the purpose of realization volume increase oil gas.But, multiple interpretation of logging data and formation testing result prove, when drilling oil, gas-bearing formation, the permeability of oil, gas-bearing formation is not to be isotropic around the borehole axis: its permeability of downbeam the when crack of various rock stratum, joints development direction, deposition is better than other direction far away, geostatic stress maximum on such direction.If can allow perforating bullet only penetrate towards the both direction of maximum geostatic stress during perforation, also promptly towards the stratum direction perforation of good penetrability, the eyelet degree of depth can be bigger than other direction, and the production capacity of oil, gas-bearing formation will obviously increase.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provide that a kind of to collect straight well oriented perforation, integral type synergy perforation and multistage pulses high enegry gas fracturing comprehensive technology be the perforating system of one, be straight well orientation multistage pulses synergistic perforator, this device reaches better oil, gas effect of increasing production after can making perforating job.
For solving the problems of the technologies described above, the perforating system that the utility model provides comprises directed priming adapter, perforating gun string and multistage pulses high enegry gas fracturing unit, described directed priming adapter contains directional bond, orientation joint, initiator and directed rifle head, directional bond is welded on the orientation joint, one end of orientation joint is connected with initiator, and described initiator is installed in directed rifle head upper end; Described perforating gun string is formed by many perforating gun serial connections, perforating gun contains orientation rifle body, firing mount, multiple perforating bullet and one-level synergy gunpowder, the firing mount that perforating bullet is housed is contained in the orientation rifle body, the bullet of the axis of perforating bullet and firing mount axis normal and two adjacent perforations bullets differs 180 ° of phase places, one-level synergy gunpowder is installed in the slit between the adjacent perforations bullet, be connected by two male joints that detonating primer and detonating fuse are housed between each perforating gun, detonating fuse one end is connected with detonating primer, and the other end is connected with perforating bullet; Multistage pulses high enegry gas fracturing unit contains secondary synergy gunpowder, three grades of synergy gunpowder, dividing plate Time Delay Squib, igniting powder column, connecting rod, connector and seal plugs, secondary synergy gunpowder and three grades of synergy gunpowder link together by the metal center pipe, the igniting powder column is placed in the described metal center pipe, the dividing plate Time Delay Squib is installed in the described connector, the metal center pipe of one end of connector and secondary synergy gunpowder port is connected, and the metal center pipe of seal plug and three grades of synergy gunpowder ports is connected; First perforating gun is connected with the lower end of described directed rifle head, the gun breech of last perforating gun is connected by connector and described multistage pulses high enegry gas fracturing unit, and the perforating bullet bullet axle in each perforating gun all points to the radial direction at described directional bond place, during perforating job, the other end of described orientation joint is connected with oil pipe.
According to the utility model, 90 ° of directions of each the blind hole both sides on described orientation rifle body are respectively established a relief hole.
According to the utility model, also comprise public lower contact, screen casing and screen casing plug, described connector is installed in the public lower contact, screen pipe sleeve is in the outside of secondary synergy gunpowder and three grades of synergy gunpowder, one end of screen casing is connected with an end of public lower contact, the other end is connected with the screen casing plug, and the other end of public lower contact is connected with described last perforating gun.
The beneficial effects of the utility model are embodied in the following aspects:
(1) the utility model is the novel synergistic perforator that multistage pulses enhanced perforation equpment in use for oil and gas well deep penetration synergy perforation, high enegry gas fracturing, fracturing and oriented perforating device advantage are integrated in one.The ability of breaking that this device has not only possessed deep penetration synergy perforation is strong, make the advantage that seam is dark, eyelet is big, draw the technology of fracturing again with proppant, the high pressure that utilizes powder gas to produce, rock fracture proppant in the gunpowder is clamp-oned the stratum, prevented the closure of formation fracture, thereby the volume increase usefulness of oriented perforating, synergy, pressure break is brought into play more fully.
(2) the utility model is simple in structure, easy to connect, perforating gun string can be made up of many orientation integral type synergy perforating guns by the designing requirement of perforated interval, is connected by two male joints between perforating gun and the perforating gun, so not only has been convenient to decide direction but also greatly limit has reduced the perforation blind area; Bullet or projectile tail between interior two the adjacent perforations bullets of rifle differ 180 ° of phase places, by the hole site of crossing on screw in directed rifle head or the two male joint and the orientation rifle body, can make the axis of all perforating bullets in the perforation pipe string all point to the radial direction at directional bond place.During construction, adjust the orientation of perforation pipe string by the position of direction of measurement key, finally make the maximum stress direction on the orientation of its axis stratum of perforating bullet, promptly perforating bullet will be to the best stratum direction perforation of permeability, thereby has improved the oil production of perforating job greatly.
(3) the utility model adopts hanging synergy gunpowder down; there is the protection screen casing outside of hanging synergy gunpowder down; its effect one is to avoid secondary synergy gunpowder and three grades of synergy gunpowder with internal surface of sleeve pipe friction or collision to take place in inclined shaft; the 2nd, be convenient to powder gas and overflow, the 3rd, the residue behind the energy collection unit divided combustion.
(4) on directed rifle body of the present utility model, its 90 ° of directions in each blind hole both sides are respectively bored a relief hole, its effect one is to keep two orientation rifle bodies still to have higher outer pressure resistance, the 2nd, the thin-walled at the bottom of the relief hole can opening pressure release when igniting, and the 3rd, without the pressure release pad and can in well, not stay junk.
Description of drawings
Fig. 1 is the composition schematic diagram of straight well orientation multistage pulses synergistic perforator.
Fig. 2 is that the multistage pulses high enegry gas fracturing block construction among Fig. 1 is formed schematic diagram.
Fig. 3 is that the structure of the orientation integral type synergy perforating gun among Fig. 1 is formed schematic diagram.
The specific embodiment
Below in conjunction with accompanying drawing and preferred embodiment the utility model is described in further detail.
According to shown in Figure 1, the preferred embodiment of straight well orientation multistage pulses synergistic perforator is made of directed priming adapter, perforating gun string and multistage pulses high enegry gas fracturing unit.Directed priming adapter comprises orientation joint 2, initiator 3 and directed rifle head 4.Be welded with directional bond 1 on the orientation joint 2, its upper end is connected with oil pipe, and the lower end is connected with initiator 3, and directed rifle head 4 upper ends have installs initiator 3 in screw and the screw, and the lower end then is connected with perforating gun string.The effect of orientation joint 2 is, after instrumentations such as gyroscope enter along the oil pipe centre bore, instrumentations ends down such as directional bond 1 and gyroscope bumped connect, and the while can also indicate the perforation direction of perforating bullet in the perforating gun string.Initiator 3 is standard products, is connected between orientation joint 2 and the directed rifle head 4, and its effect is the whole firer parts of back by detonating primer and detonating fuse ignition perforating gun string that detonate.
According to shown in Figure 2, multistage pulses high enegry gas fracturing unit comprises public lower contact 6, connector 7, dividing plate Time Delay Squib 8, igniting powder column 9, secondary synergy gunpowder 10 and three grades of synergy gunpowder 11, screen casing 12, seal plug 14 and screen casing plugs 13.Public lower contact 6 has inner bolt hole and through wires hole vertically, 7 convex shapes of connector and have external screw thread and inner bore of step.The main body of dividing plate Time Delay Squib 8 is columned metalworks, and it is revolved by screw thread by top stainless steel part and bottom common metal powder charge pipe and is one.The main effect of dividing plate Time Delay Squib 8 is that detonation wave is converted to flame, it can postpone a period of time and refire subordinate's synergy gunpowder behind higher level's perforating gun perforation, avoided the stack of gunpowder pressure peak, its another effect is a waterproof, in perforation chamber string is gone into the well process, if subordinate's synergy gunpowder water inlet then can not allow water enter in the upper level perforating gun owing to 8 stopping of median septum of dividing plate Time Delay Squib, thereby can avoid the generation of fried rifle accident.Igniting powder column 9 is to be 14mm～16mm, highly to be the pyrotechnic charge column that 10mm～30mm does not wait by the have high heat and high-energy and diameter that contain that metal powder pyrotechnic composition compacting forms.Secondary synergy gunpowder 10, three grades of synergy gunpowder 11 are the standard gunpowder, promptly in combustible case, place a metal center pipe, metal center pipe two ends inwall has secondary sealing area and connecting thread, the water-fast gunpowder of filling in the annulus that metal center pipe and combustible case form: secondary synergy gunpowder 10 filling combustion speed also can be other higher relatively propellant powder of combustion speed at 8mm/s～10mm/s or higher composite solidpropellant or the double-base powder of combustion speed; Three grades of 11 filling combustions of synergy gunpowder fast composite solidpropellant or double-base powders at 4mm/s～6mm/s also can be other relatively low propellant powder of combustion speed.The conflagration characteristic of secondary synergy gunpowder 10 is for shelly ground, and the fracture number that improves the perforated zone has very great help; And the dose of three grades of synergy gunpowder 11 is relatively large, and gas production is also bigger, and a large amount of gases that its burning produces are for the fracture length on extension stratum, and reaching in the effective communication of perforation tunnel and stratum intrinsic fracture has very big benefit.In addition, in secondary synergy gunpowder 10, three grades of synergy gunpowder 11, all be added with an amount of proppant, proppant in this preferred embodiment is the special ceramic bead between Φ 0.5mm～Φ 1mm, these beads can enter in the formation fracture with the high-temperature gas that powder burning produces, play a supporting role, in case the closure of formation fracture.Screen casing 12 is metalworks of a cylindrical shape, has many meshes and two ends on it and has internal thread, and mesh also has position, four directions elongated slot except that containing many row's eight directional macropores.Secondary synergy gunpowder 10 and three grades of synergy gunpowder 11 are installed in the inside of screen casing 12, screen casing 12 can prevent effectively that secondary synergy gunpowder 10, three grades of synergy gunpowder 11 from bumping, rubbing with the down-hole casing inwall of distortion, the high energy gas that can also allow two, three grades of synergy gunpowder 10,11 produce simultaneously shed smoothly and will burn after residue be deposited in the bottom of screen casing 12.Public lower contact 6 is threaded with the upper end of screen casing 12; Dividing plate Time Delay Squib 8 is contained in the step macropore of connector 7; The big end of connector 7 is connected with the screw of public lower contact 6, and small end is threaded with the upper end of secondary synergy gunpowder 10 metal center pipes; Igniting powder column 9 is placed in the metal center pipe of secondary synergy gunpowder 10 and three grades of synergy gunpowder 11 intersections; Seal plug 14 is threaded with the lower end of three grades of synergy gunpowder 11 metal center pipes; Screen casing plug 13 is threaded with the lower end of screen casing 12.
In the utility model, perforating gun string is to be formed by many perforations 5 rifles serial connection.In the utility model, perforating gun 5 is selected orientation integral type synergy perforating gun for use, and its quantity is to dispose according to the designing requirement of perforated interval, generally more than three.According to shown in Figure 3, single perforating gun 5 comprises detonating primer 15, sealing ring 16, retaining pipe 17, orientation rifle body 18, firing mount 19, perforating bullet 20, positioning disk 21, supporting positive cover 22, directional bolt 23, two male joint 24 down, sets upright 25, two back-up rings 26 of plug, trip bolt 27, one-level synergy gunpowder 28, goes up positioning disk 29, detonating fuse 30.Detonating primer 15 is standard products, can be any detonating primer with propagation of explosion function that uses in each oil field now.Retaining pipe 17 is standard products, can be any retaining pipe that uses in each oil field now.Detonating fuse 30 is standard products, can be any use in each oil field now have a detonating fuse of leading quick-fried function.Perforating bullet 20 in the rifle all is standard products with one-level synergy gunpowder 28.A plurality of perforating bullets 20 stack along firing mount 19 axis, the axis of perforating bullet 20 and firing mount 19 axis normal, and bullet or projectile tail between two adjacent perforations bullets 20 differ 180 °.Last positioning disk 19 is identical with following positioning disk 21 structures and have a centre bore, both are connected with the upper and lower side of firing mount 19 respectively by trip bolt 27, two back-up rings 26 are connected with last positioning disk 29 and following positioning disk 21 respectively, and its effect is the interlude that firing mount 19 is limited in orientation rifle body 18.In the slit that one-level synergy gunpowder 28 is placed between the adjacent perforations bullet 20.In directed priming adapter, the lower end of directed rifle head 4 has external screw thread and along the directed screw of circumferential arrangement, the centre has the one-level stepped hole that communicates with two ends, dress detonating primer 15 in the step macropore, and the step aperture is put retaining pipe 17.Orientation rifle body 18 is main bodys of whole orientation integral type synergy perforating gun 5, respectively bores a φ 18mm～φ 30mm in 90 ° of directions of its each blind hole 31 both sides, and the hole diapire is thick to be the relief hole of 2mm ± 1mm; Its effect one is to keep two orientation rifle bodies still to have higher outer pressure resistance, the 2nd, and the thin-walled at the bottom of the relief hole can opening pressure release when igniting, and the 3rd, under the situation that does not have the pressure release pad, can in well, not stay junk; Two ports of orientation rifle body 18 all have along the internal thread of axis with along the via hole of circumferential arrangement.The two ends thread root of two male joints 24 is all with directed screw, seal groove and the center stepped hole of circumferential arrangement.Link to each other with two screw thread port of its orientation rifle body 18 by two male joints 24 between every orientation integral type synergy perforating gun 5, wherein: the junction is by directional bolt 23 lockings and by sealing ring 16 sealings; Dress is set upright plug 25 in the step macropore of two male joints 24, set upright dress detonator 15 in the plug 25, supporting positive cover 22 1 ends are inserted into to be set upright in the plug 25, the other end is inserted into down in the centre bore of positioning disk, and the detonating fuse 30 that is connected detonating primer 15 two ends links to each other with perforating bullet 20 in the following perforating gun 15 with this perforating gun 15 respectively.The internal thread of the rifle head of first perforating gun 5 by its orientation rifle body 18 upper ends is connected with the external screw thread of directed rifle head 4 lower ends, and the gun breech of last perforating gun 5 passes through the internal thread of its orientation rifle body 18 lower ends and is connected with public lower contact 6 in the multistage pulses high enegry gas fracturing unit.The effect of directed rifle head 4 and two male joints 24 is installation directions of regulating perforating bullet 20, can regulate by the via hole on positioning screw hole in directed rifle head 4 or the male joint 24 and orientation rifle body 18 ports, make the radial direction at orientation of its axis directional bond 1 place of perforating bullet 20.Adopt two male joints 24 to connect between each perforating gun 5, not only be convenient to decide direction but also greatly limit reduce the perforation blind area.
The course of work of the present utility model is as follows:
During construction, with the present invention according to the desired depth in the oil gas well under the construction pipe string shown in Figure 1 after, be lowered to instrumentation such as gyroscope and measure the deviation of directional bond 1 and perforation direction, the perforation direction is that the difference at the maximum geostatic stress azimuth on the perforated interval drift azimuth that provides according to the well log interpretation data and its corresponding stratum is determined.Adopt tuning instrument swivelling pipe string, make directional bond point to the perforation direction after, from well head toward oil pipe in roller caber of input, caber percussion primer 3 also makes its effect.Immediately, effect by detonating primer 15 in each rifle and detonating fuse 30, by first perforating gun 5 beginning detonate in turn in each perforating gun perforating bullet 20 and carry out perforation, behind each perforating gun 5 perforation, name a person for a particular job one-level synergy gunpowder 28 in its rifle of the high temperature of its generation, gases at high pressure and high-temperature metal caloic is lighted and is made it and blazes up; Meanwhile, by the detonating fuse 30 that last perforating gun 15 is drawn the dividing plate Time Delay Squib in the multistage pulses high enegry gas fracturing unit 8 is ignited, the detonation energy that the produces powder column 9 of will lighting a fire is lighted, the high temperature and high pressure gas that igniting powder column 9 burning backs produce and a large amount of metal fever particles are lighted secondary synergy gunpowder 10 (conflagration medicine) and three grades of synergy gunpowder 11 (burning at a slow speed), the synergy gunpowder of different combustion speed produces secondary pressure pulse to three time pressure pulse pressure break is carried out on the stratum, the crack is constantly extended, reach the effect that duct behind the perforation and intrinsic fracture are further linked up.Simultaneously, the proppant in the gunpowder has stoped the closure of formation fracture along with the gas of HTHP has entered in the formation fracture together, thereby has reached the better fuel-displaced and effect of giving vent to anger.
Claims (3)
1. straight well orientation multistage pulses synergistic perforator, comprise directed priming adapter, perforating gun string and multistage pulses high enegry gas fracturing unit, it is characterized in that: described directed priming adapter contains directional bond [1], orientation joint [2], initiator [3] and directed rifle head [4], directional bond [1] is welded on the orientation joint [2], one end of orientation joint [2] is connected with initiator [3], and described initiator [3] is installed in directed rifle head [4] upper end; Described perforating gun string is formed by many perforating guns [5] serial connection, perforating gun [5] contains orientation rifle body [18], firing mount [19], multiple perforating bullet [20] and one-level synergy gunpowder [28], the firing mount [19] that perforating bullet [20] are housed is contained in the orientation rifle body [18], the bullet of the axis of perforating bullet [20] and firing mount [19] axis normal and two adjacent perforations bullets [20] differs 180 ° of phase places, one-level synergy gunpowder [28] is installed in the slit between the adjacent perforations bullet [20], be connected by two male joints [24] that detonating primer and detonating fuse are housed between each perforating gun [5], detonating fuse [30] one ends are connected with detonating primer [15], and the other end is connected with perforating bullet [20]; Multistage pulses high enegry gas fracturing unit contains secondary synergy gunpowder [10], three grades of synergy gunpowder [11], dividing plate Time Delay Squib [8], igniting powder column [9], connecting rod [32], connector [7] and seal plug [14], secondary synergy gunpowder [10] and three grades of synergy gunpowder [11] link together by the metal center pipe, igniting powder column [9] is placed in the described metal center pipe, dividing plate Time Delay Squib [8] is installed in the described connector [7], the metal center pipe of one end of connector [7] and secondary synergy gunpowder [10] port is connected, and seal plug [14] is connected with the metal center pipe of three grades of synergy gunpowder [11] port; First perforating gun [5] is connected with the lower end of described directed rifle head [4], the gun breech of last perforating gun [5] is connected by connector [7] and multistage pulses high enegry gas fracturing unit, and the perforating bullet in each perforating gun [20] bullet axle all points to the radial direction at described directional bond [1] place, during perforating job, the other end of described orientation joint [2] is connected with oil pipe.
2. straight well orientation multistage pulses synergistic perforator according to claim 1 is characterized in that: 90 ° of directions of each blind hole [31] both sides on described orientation rifle body [18] are respectively established a relief hole.
3. straight well orientation multistage pulses synergistic perforator according to claim 1 and 2, it is characterized in that: also comprise public lower contact [6], screen casing [12] and screen casing plug [13], described connector is installed in the public lower contact [6], screen casing [12] is enclosed within the outside of secondary synergy gunpowder [10] and three grades of synergy gunpowder [11], one end of screen casing [12] is connected with an end of public lower contact [6], the other end is connected with screen casing plug [13], and the other end of public lower contact [6] is connected with described last perforating gun [5].
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| CN2009202454785U CN201620848U (en) | 2009-11-27 | 2009-11-27 | Vertical well orientation multi-pulse increase-benefit perforating device |
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| CN2009202454785U CN201620848U (en) | 2009-11-27 | 2009-11-27 | Vertical well orientation multi-pulse increase-benefit perforating device |
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