CN112576230A - Perforation fracturing gun and hydraulic sand blasting perforation bridge plug combined fracturing string - Google Patents
Perforation fracturing gun and hydraulic sand blasting perforation bridge plug combined fracturing string Download PDFInfo
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- CN112576230A CN112576230A CN202011548036.5A CN202011548036A CN112576230A CN 112576230 A CN112576230 A CN 112576230A CN 202011548036 A CN202011548036 A CN 202011548036A CN 112576230 A CN112576230 A CN 112576230A
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- 238000005488 sandblasting Methods 0.000 title claims abstract description 20
- 230000000903 blocking effect Effects 0.000 claims description 32
- 238000007789 sealing Methods 0.000 claims description 16
- 230000007704 transition Effects 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 6
- 238000010276 construction Methods 0.000 abstract description 19
- 230000000694 effects Effects 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 239000004576 sand Substances 0.000 description 7
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 208000028990 Skin injury Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
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- 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
- 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
- E21B43/114—Perforators using direct fluid action on the wall to be perforated, e.g. abrasive jets
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- Life Sciences & Earth Sciences (AREA)
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- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a perforating fracturing gun and a hydraulic sand blasting perforating bridge plug combined fracturing string, wherein the perforating fracturing gun comprises an outer shell (51), an upper sliding sleeve (52) and a lower sliding sleeve (54) which are vertically arranged are sleeved in the outer shell (51), a fracturing port (57) and a jet orifice (58) which are vertically arranged are arranged on the side wall of the outer shell (51), the fracturing port (57) is blocked by the upper sliding sleeve (52), and the jet orifice (58) is blocked by the lower sliding sleeve (54); after a first plugging ball (91) is put into the perforating fracturing gun, the lower sliding sleeve (54) can move downwards, and sand blasting perforating construction operation can be carried out; after a second plugging ball (92) is put into the perforating fracturing gun, the upper sliding sleeve (52) can move downwards, and large-displacement fracturing construction can be carried out. The effect of the three strings of pipe columns can be realized by putting one string of hydraulic sand blasting perforation bridge plug combined fracturing pipe column containing the perforation fracturing gun, and the fracturing efficiency is greatly improved.
Description
Technical Field
The invention relates to the field of oil exploitation equipment, in particular to a perforation fracturing gun, and also relates to a hydraulic sand-blasting perforation bridge plug combined fracturing string.
Background
When an abnormal high-temperature high-pressure low-porosity and low-permeability oil reservoir is mined, a well type usually adopts a highly deviated well and a horizontal well as main production wells, the well completion mode is mostly screen pipe well completion, after production increasing measures such as polymer injection for many years, the blockage situation of a near wellbore zone is very serious, after composite blockage removal and acidification blockage removal, the stratum blockage range is gradually deepened, and the blockage type is more complicated.
The fracturing transformation is adopted, the plugging removal range can be deeper, short cracks generated in an oil layer after the fracturing transformation can effectively remove polymer plugging, and meanwhile, a sand blocking barrier is established, so that the multi-effect sand prevention and production increase is realized.
The traditional screen pipe fracturing process typically requires three pipe runs: the first pass is a perforating string; the second run is a sand-packed (protecting the bottom sand control section) string and the third run is a fracturing string. And then carrying out sand blowing operation on the bottom sand filling. The disadvantages are: the construction period is long, the construction risk is high, and the production efficiency is low.
Disclosure of Invention
In order to improve the fracturing efficiency, the invention provides a perforating fracturing gun and a hydraulic sand blasting perforating bridge plug combined fracturing string, and the effect of the three strings can be realized by putting one string of the hydraulic sand blasting perforating bridge plug combined fracturing string containing the perforating fracturing gun, so that the fracturing efficiency is greatly improved.
The technical scheme adopted by the invention for solving the technical problems is as follows: a perforating fracturing gun comprises an outer shell, wherein the outer shell is of a tubular structure, an upper sliding sleeve and a lower sliding sleeve which are arranged up and down are sleeved in the outer shell, a fracturing port and a jet port which are arranged up and down are arranged on the side wall of the outer shell, the upper sliding sleeve is used for plugging the fracturing port, and the lower sliding sleeve is used for plugging the jet port; after the first plugging ball is thrown into the perforating fracturing gun, the first plugging ball can penetrate through the upper sliding sleeve and then is in sealing connection with the lower sliding sleeve, and the first plugging ball can also push the lower sliding sleeve to move downwards and enable the interior of the outer shell to be communicated with the exterior of the outer shell through the jet opening; after throwing into the second shutoff ball in to perforation fracturing rifle, the second shutoff ball can with go up the slip cap seat seal and be connected, the second shutoff ball can also promote to go up the slip cap and move down to the inside of messenger's shell body is through the outside intercommunication of pressure breach and shell body.
Go up sliding sleeve and shell body sealing connection, go up sliding sleeve and shell body clearance fit or transition fit, go up sliding sleeve and be connected with the shell body through first shear pin.
The pressing gap is of a long strip-shaped structure, the length direction of the pressing gap is parallel to the axial direction of the outer shell, and the area of the pressing gap is 2742mm2。
Go up the upper end of sliding sleeve and be equipped with annular seat front cover, go up annular seat front cover and be the toper structure of handstand, the second shutoff ball can be connected with the last annular seat front cover sealing of last sliding sleeve.
The lower sliding sleeve is connected with the outer shell in a sealing mode, is in clearance fit or transition fit with the outer shell, and is connected with the outer shell through the second shearing pin.
The side wall of the outer shell is provided with a plurality of jet ports, the jet ports are internally sleeved with a nozzle, the nozzle is of an annular structure, the axis of the nozzle is perpendicular to the axis of the outer shell, and the inner surface of the inner end of the nozzle is provided with a rounding transition surface.
Protruding in being equipped with the annular in the lower extreme of lower sliding sleeve, bellied upper end is equipped with down annular seat front cover in the annular, and lower annular seat front cover is the toper structure of handstand, and first shutoff ball can be connected with the lower annular seat front cover seat seal of lower sliding sleeve, and the upper end internal diameter of lower annular seat front cover is less than or equal to the lower extreme internal diameter of upper annular seat front cover.
The diameter of the first blocking ball is smaller than that of the second blocking ball.
The utility model provides a water conservancy sandblast perforation bridging plug allies oneself with fracturing string, includes packer, perforation fracturing rifle and the bridging plug that sets gradually, and the perforation fracturing rifle is foretell perforation fracturing rifle.
The packer is connected with the oil pipe through a hydraulic safety joint, and the perforation fracturing gun is connected with the bridge plug through a setting tool.
The invention has the beneficial effects that:
1. the construction efficiency is improved. The original three-time construction is shortened into one-time pipe column, and the construction efficiency is greatly improved.
2. The construction cost is reduced. The original sand filling operation and perforating operation are cancelled, and the construction cost is greatly reduced.
3. And multiple clusters of perforation can be performed, and the stratum can be more finely reformed.
4. After the perforation operation is finished, the fracturing port is opened, and the fracturing port adopts a non-throttling design, so that a larger fracturing channel is provided, and large-scale stratum transformation is facilitated.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
Figure 1 is a schematic view of a perforating fracturing gun of the present invention.
Fig. 2 is a schematic diagram after a first plugging ball is dropped into the perforating fracturing gun.
Fig. 3 is a schematic illustration of the perforating fracturing gun after a second plugging ball is inserted therein.
Fig. 4 is a schematic view of a nozzle.
Fig. 5 is a schematic view of a hydraulically sand blasted perforating bridge plug in conjunction with a fracturing string.
1. An oil pipe; 2. a sleeve; 3. a hydraulic safety joint; 4. a packer; 5. a perforating fracturing gun; 6. a screen pipe; 7. setting a tool; 8. a bridge plug;
51. an outer housing; 52. an upper sliding sleeve; 53. a first shear pin; 54. a lower sliding sleeve; 55. a second shear pin; 56. a seal ring; 57. pressing a crack; 58. an ejection port;
521. an upper annular seat cover;
541. an annular inner protrusion; 542. a lower annular seat cover;
581. a nozzle; 582. rounding the transition surface;
91. a first blocking ball; 92. and a second plugging ball.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
A perforating fracturing gun comprises an outer shell 51, wherein the outer shell 51 is of a tubular structure, an upper sliding sleeve 52 and a lower sliding sleeve 54 which are vertically arranged are sleeved in the outer shell 51, a fracturing port 57 and a jetting port 58 which are vertically arranged are arranged on the side wall of the outer shell 51, the upper sliding sleeve 52 blocks the fracturing port 57, and the lower sliding sleeve 54 blocks the jetting port 58; after the first blocking ball 91 is thrown into the perforating fracturing gun, the first blocking ball 91 can penetrate through the upper sliding sleeve 52 and then is in sealing connection with the lower sliding sleeve 54, and the first blocking ball 91 can also push the lower sliding sleeve 54 to move downwards, so that the inside of the outer shell 51 is communicated with the outside of the outer shell 51 through the jet opening 58; after the second plugging ball 92 is put into the perforating fracturing gun, the second plugging ball 92 can be in sealing connection with the upper sliding sleeve 52, and the second plugging ball 92 can also push the upper sliding sleeve 52 to move downwards, so that the inside of the outer shell 51 is communicated with the outside of the outer shell 51 through the fracturing port 57, as shown in fig. 1 to 3.
After the first blocking ball 91 is put into the perforating fracturing gun, the first blocking ball 91 can push the lower sliding sleeve 54 to move downwards, the jet opening 58 is in an exposed and opened state, and perforating fluid in the outer shell 51 can be ejected through the jet opening 58, so that the hydraulic sand-blasting perforating construction operation is realized. When to drop into second shutoff ball 92 back in the perforation fracturing rifle, second shutoff ball 92 can promote sliding sleeve 52 and move down, and fracturing mouth 57 will be in and expose the open mode, and the fracturing fluid in the shell body 51 can be through fracturing mouth 57 blowout to realize the fracturing construction of big discharge capacity.
In the present embodiment, the upper sliding sleeve 52 is hermetically connected to the outer housing 51, a sealing ring 56 is disposed between the upper sliding sleeve 52 and the outer housing 51, and the sealing ring 56 is located at the upper and lower ends of the upper sliding sleeve 52. The upper sliding sleeve 52 and the outer shell 51 can be in clearance fit or transition fit, and the upper sliding sleeve 52 is fixedly connected with the outer shell 51 through a first shear pin 53.
In the bookIn the embodiment, the outer shell 51 is in an upright state, the fracturing port 57 is in a strip-shaped structure, such as a runway shape, the length direction of the fracturing port 57 is parallel to the axial direction of the outer shell 51, and the area of the fracturing port 57 is 2742mm2. The plurality of press-slits 57 are arranged at intervals in the circumferential direction of the outer housing 51.
In this embodiment, an upper annular seat cover 521 is disposed in the upper end of the upper sliding sleeve 52, the upper annular seat cover 521 is an inverted cone-shaped structure, the inner diameter of the upper end of the upper annular seat cover 521 is greater than the inner diameter of the lower end of the upper annular seat cover 521, and the second blocking ball 92 can be in seated connection with the upper annular seat cover 521 of the upper sliding sleeve 52. The diameter of the second blocking ball 92 is smaller than the inner diameter of the upper end of the upper annular seat cover 521, and the diameter of the second blocking ball 92 is larger than the inner diameter of the lower end of the upper annular seat cover 521.
In this embodiment, the lower sliding sleeve 54 is connected with the outer shell 51 in a sealing manner, a sealing ring 56 is arranged between the lower sliding sleeve 54 and the outer shell 51, and the sealing ring 56 is located at the upper end and the lower end of the lower sliding sleeve 54. The lower sliding sleeve 54 and the outer shell 51 can be in clearance fit or transition fit, and the lower sliding sleeve 54 is connected with the outer shell 51 through a second shear pin 55 for transition.
In this embodiment, a plurality of injection ports 58 are provided on the side wall of the outer housing 51, a nozzle 581 is provided in the injection ports 58, the nozzle 581 has an annular structure, the inner diameter of the nozzle 581 may be 6mm to 8mm, the axis of the nozzle 581 is perpendicular to the axis of the outer housing 51, and the inner surface of the inner end of the nozzle 581 is provided with a rounded transition surface 582.
The location and number of injection ports 58 can be determined as required, the nozzles 581 and the injection ports 58 can be connected by screw threads, and the rounded transition surfaces 582 in the nozzles 581 can reduce the impact and resistance of the perforating fluid on the nozzles 581, thereby prolonging the service life of the nozzles 581 and increasing the pressure, as shown in fig. 4.
In this embodiment, an annular inner protrusion 541 is disposed in the lower end of the lower sliding sleeve 54, a lower annular seat cover 542 is disposed at the upper end of the annular inner protrusion 541, the lower annular seat cover 542 is of an inverted conical structure, the inner diameter of the upper end of the lower annular seat cover 542 is greater than the inner diameter of the lower end of the lower annular seat cover 542, the first blocking ball 91 can be in seat sealing connection with the lower annular seat cover 542 of the lower sliding sleeve 54, and the inner diameter of the upper end of the lower annular seat cover 542 is less than or equal to the inner diameter of the lower end of the upper annular seat cover 521. The diameter of the first blocking ball 91 is smaller than the inner diameter of the upper end of the lower annular seat cover 542, and the diameter of the first blocking ball 91 is larger than the inner diameter of the lower end of the lower annular seat cover 542.
In the present embodiment, the diameter of the first blocking ball 91 (e.g., 27mm) is smaller than the diameter of the second blocking ball 92 (e.g., 30 mm). The inner diameter of the upper sliding sleeve 52 is a through structure, i.e. the inner diameter of the upper sliding sleeve 52 is the same everywhere. The lower sliding sleeve 54 has the same inner diameter everywhere except at the lower end of the lower sliding sleeve 54. The inner diameter of the upper sliding sleeve 52 is the same as the upper inner diameter of the lower sliding sleeve 54.
The hydraulic sand blasting perforation bridge plug combined fracturing string is described as follows, and comprises a packer 4, a perforation fracturing gun 5 and a bridge plug 8 which are sequentially arranged, wherein the perforation fracturing gun 5 is the perforation fracturing gun, and is shown in fig. 5.
In this embodiment, the packer 4 is connected to the tubing 1 by a hydraulic safety joint 3 and the perforating fracturing gun 5 is connected to the bridge plug 8 by a setting tool 7. The packer 4 may be an existing RTTS packer and the hydraulic safety joint 3, setting tool 7 and bridge plug 8 may all be of prior art products. The hydraulic sand blasting perforation bridge plug combined fracturing pipe column is novel and reasonable in structure, high in tool reliability, suitable for a high-temperature environment, convenient to operate, safe and environment-friendly, low in construction risk and high in construction efficiency, and the fracturing pipe column and the fracturing tool are provided.
The working process of the perforating fracturing gun and the hydraulic sand blasting perforating bridge plug combined fracturing string is described below.
Taking a vertical well as an example, the concrete construction steps of the hydraulic sand blasting perforation bridge plug combined fracturing pipe column are as follows:
1. and (5) starting an original well pipe column, dredging a well and scraping.
2. The hydraulic sand blasting perforation bridge plug combined fracturing string is put into a well, the hydraulic sand blasting perforation bridge plug combined fracturing string comprises an oil pipe 1, a hydraulic safety joint 3, a packer 4, a perforation fracturing gun 5 setting tool 7 and a bridge plug 8 which are sequentially connected from top to bottom, the well comprises a casing pipe 2 and a screen pipe 6, and the bridge plug 8 is arranged at a blind pipe position, as shown in figure 5.
3. And (4) circularly washing the well, putting a third plugging ball (phi 12.7mm) into the well, pressing, setting the bridge plug 8, releasing the plug, and detecting the seal by downward probing.
The setting tool 7 is used for setting the bridge plug 8, after the bridge plug is completely set, oil pressure continues to rise, the setting tool 7 is separated from the bridge plug 8, and the pipe column can be lowered to test the seal and test the hanging.
4. Lifting the hydraulic sand-blasting perforation bridge plug to be combined with the rest part of the fracturing string, so that the perforation fracturing gun 5 is arranged to a perforation section, and the packer 4 is set and tested.
5. Throwing a ball for perforation, throwing a first blocking ball 91 (phi 27mm) into the perforation fracturing gun 5, setting the first blocking ball 91 and the lower sliding sleeve 54 for connection, pushing the lower sliding sleeve 54 to move downwards by the first blocking ball 91, separating the lower sliding sleeve 54 from the outer shell 51, exposing and opening the jet orifice 58, wherein the pressure of perforating liquid in the outer shell 51 is 15MPa, and jetting the perforating liquid by the jet orifice 58, namely high-speed mortar directly impacts on the inner wall of the sleeve through the nozzle 581, so that the sleeve and an external cement ring are directly penetrated through as a result, and the stratum is penetrated to carry out hydraulic sand-blasting perforation operation.
Due to the small diameter of the nozzle 581 (usually 6mm-8mm), the pressure at the construction wellhead is too high, and large-scale stratum reconstruction is not easy to carry out.
6. And (3) throwing large ball fracturing, namely throwing a second blocking ball 92 (phi 30mm) into the perforating fracturing gun 5, wherein the second blocking ball 92 is connected with the upper sliding sleeve 52 in a sealing manner, the second blocking ball 92 pushes the upper sliding sleeve 52 to move downwards until the upper sliding sleeve 52 is abutted against the upper end of the lower sliding sleeve 54, the fracturing port 57 is in an exposed opening state, and the fracturing port 57 sprays fracturing fluid to perform fracturing construction. The overflowing area of the fracturing port 57 is large, so that the friction resistance along the way is small, the construction pressure is effectively reduced, the sand-liquid ratio is improved, and large-scale fracturing construction can be carried out.
7. And (5) after fracturing is completed, lifting the pipe column, and deblocking the packer 4 to obtain the fractured pipe column.
The hydraulic sand blasting perforation bridge plug combined fracturing string can be used for fracturing of horizontal wells, highly-deviated wells and vertical wells, and has the advantages of high fracturing efficiency, high tool reliability, no influence on the sealing property of a cement sheath due to hydraulic cutting, change of radial seepage of a near well zone into radial and vertical bidirectional seepage due to the hydraulic cutting, increase of a near well pressure drop funnel, remarkable reduction of seepage resistance, capability of cleaning stratums, elimination of skin injury, adaptation to high-temperature environment, convenience in operation, safety, environmental protection, low construction risk and the like, and can be used as a fracturing tool for exploiting petroleum and natural gas in oil fields.
For convenience of understanding and description, the absolute positional relationship is used in the present invention for expression, wherein the directional word "up" denotes an upper direction in fig. 1, "down" denotes a lower direction in fig. 1, "left" denotes a left direction in fig. 1, and "right" denotes a right direction in fig. 1. The invention has been described in terms of a user or reading from a viewing perspective, but the above directional terms are not to be construed or interpreted as limiting the scope of the invention.
The above description is only exemplary of the invention and should not be taken as limiting the scope of the invention, so that the invention is intended to cover all modifications and equivalents of the embodiments described herein. In addition, the technical features and the technical schemes, and the technical schemes can be freely combined and used.
Claims (10)
1. The perforating fracturing gun is characterized by comprising an outer shell (51), wherein the outer shell (51) is of a tubular structure, an upper sliding sleeve (52) and a lower sliding sleeve (54) which are vertically arranged are sleeved in the outer shell (51), a fracturing port (57) and a jet orifice (58) which are vertically arranged are arranged on the side wall of the outer shell (51), the fracturing port (57) is plugged by the upper sliding sleeve (52), and the jet orifice (58) is plugged by the lower sliding sleeve (54);
after a first blocking ball (91) is put into the perforating fracturing gun, the first blocking ball (91) can penetrate through the upper sliding sleeve (52) and then is in sealing connection with the lower sliding sleeve (54), the first blocking ball (91) can also push the lower sliding sleeve (54) to move downwards, and the inside of the outer shell (51) is communicated with the outside of the outer shell (51) through the jet opening (58);
after a second blocking ball (92) is thrown into the perforating fracturing gun, the second blocking ball (92) can be connected with the upper sliding sleeve (52) in a sealing mode, the second blocking ball (92) can also push the upper sliding sleeve (52) to move downwards, and the inside of the outer shell (51) is communicated with the outside of the outer shell (51) through the pressing split (57).
2. The perforating fracturing gun as recited in claim 1, characterized in that the upper sliding sleeve (52) is sealingly connected with the outer casing (51), the upper sliding sleeve (52) is clearance-fitted or transition-fitted with the outer casing (51), and the upper sliding sleeve (52) is connected with the outer casing (51) by a first shear pin (53).
3. Perforation fracturing gun as claimed in claim 1, characterized in that the fracturing mouth (57) is of elongated configuration, the length direction of the fracturing mouth (57) being parallel to the axial direction of the outer casing (51), the area of the fracturing mouth (57) being 2742mm2。
4. Perforation fracturing gun, according to claim 1, characterized in that the upper end of the upper sliding sleeve (52) is provided with an upper annular seat cover (521), the upper annular seat cover (521) is of inverted conical configuration, the second blocking ball (92) being seatable with the upper annular seat cover (521) of the upper sliding sleeve (52).
5. Perforation fracturing gun, according to claim 1, characterized in that the lower sliding sleeve (54) is sealingly connected with the outer casing (51), the lower sliding sleeve (54) is clearance or transition fitted with the outer casing (51), the lower sliding sleeve (54) is connected with the outer casing (51) by means of a second shear pin (55).
6. The perforating fracturing gun as claimed in claim 1, characterized in that a plurality of jetting ports (58) are arranged on the side wall of the outer shell (51), a nozzle (581) is sleeved in the jetting ports (58), the nozzle (581) is of an annular structure, the axis of the nozzle (581) is perpendicular to the axis of the outer shell (51), and the inner surface of the inner end of the nozzle (581) is provided with a rounded transition surface (582).
7. The perforating fracturing gun as claimed in claim 4, characterized in that the lower end of the lower sliding sleeve (54) is provided with an annular inner protrusion (541), the upper end of the annular inner protrusion (541) is provided with a lower annular seat cover (542), the lower annular seat cover (542) is of an inverted cone structure, the first plugging ball (91) can be in seated connection with the lower annular seat cover (542) of the lower sliding sleeve (54), and the inner diameter of the upper end of the lower annular seat cover (542) is smaller than or equal to the inner diameter of the lower end of the upper annular seat cover (521).
8. Perforation fracturing gun, according to claim 7, characterized in that the diameter of the first blocking ball (91) is smaller than the diameter of the second blocking ball (92).
9. The hydraulic sand blasting perforation bridge plug combined fracturing string is characterized by comprising a packer (4), a perforation fracturing gun (5) and a bridge plug (8) which are sequentially arranged, wherein the perforation fracturing gun (5) is the perforation fracturing gun as claimed in claim 1.
10. The hydraulic sand blasting perforation bridge plug combined fracturing string as claimed in claim 9, characterized in that the packer (4) is connected with the tubing (1) through a hydraulic safety joint (3), and the perforation fracturing gun (5) is connected with the bridge plug (8) through a setting tool (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011548036.5A CN112576230A (en) | 2020-12-24 | 2020-12-24 | Perforation fracturing gun and hydraulic sand blasting perforation bridge plug combined fracturing string |
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| CN202011548036.5A CN112576230A (en) | 2020-12-24 | 2020-12-24 | Perforation fracturing gun and hydraulic sand blasting perforation bridge plug combined fracturing string |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114592845A (en) * | 2022-02-21 | 2022-06-07 | 太原理工大学 | Repeatable hydraulic jet slotting and fracturing combined operation device and use method |
| CN114622886A (en) * | 2022-02-10 | 2022-06-14 | 中国石油化工集团有限公司 | Cross fracturing gas testing construction method for well factory |
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| CN102536187A (en) * | 2012-02-24 | 2012-07-04 | 中国石油大学(北京) | Switchable hydraulic jet fracturing underground device with combined slide sleeves |
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