CN201991504U - Double-blind-hole multi-stage pulse perforating gun - Google Patents
Double-blind-hole multi-stage pulse perforating gun Download PDFInfo
- Publication number
- CN201991504U CN201991504U CN 201020685609 CN201020685609U CN201991504U CN 201991504 U CN201991504 U CN 201991504U CN 201020685609 CN201020685609 CN 201020685609 CN 201020685609 U CN201020685609 U CN 201020685609U CN 201991504 U CN201991504 U CN 201991504U
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- perforating
- blind hole
- hole
- rifle body
- perforating gun
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Abstract
The utility model relates to a double-blind-hole multi-stage pulse perforating gun which comprises a gun body barrel, a firing mount, blind holes and a perforating bullet; during the perforating operation, a perforating blind hole and a pressure relief blind hole are formed respectively in sequence to form a pressure relief passage under the action of high pressure generated by jet of the perforating bullet and sequential combustion of gunpowder, so that the inside pressure of the perforating gun is completely released through the pressure relief blind hole and the perforating blind hole to act on the stratum quickly, and the purpose of perforating fracture is achieved, furthermore, the accident that the multi-stage pulse perforating gun explodes or cracks can be effectively avoided, objects are prevented from falling into a pit, and safe and efficient multi-stage pulse perforating can be realized.
Description
Technical field
The utility model relates to a kind of double blinding hole multistage pulses perforating gun, is mainly used in the multistage pulses perforating job of oil gas well payzone, belongs to petroleum gas payzone measuring technology field of tool.
Background technology
At present, the multistage pulses perforation is a kind of brand-new gun perforation process, utilize the combination of multistage powder charge technology and perforating technology, realize the sequential combustion of multistage powder charge, as three peak value of pulse pressure of continuous generation, dynamic action is in the stratum, with the purpose that reaches de-plugging, makes seam, prolongs seam, expands seam, improve stratum around the well seepage flow condition, thereby increase the production capacity of oil well.Multistage pulses deep penetration jet perforating then is that a kind of dynamic pressure changes, promptly pit shaft is emptied and is made negative pressure before perforation, utilize pressure to change the flushing duct behind the perforation moment pore-forming,, produce pulse and act on duct and stratum along with the one-level powder burning, carry out de-plugging, make seam, form negative pressure again along with pressure descends, wash the duct once more, subsequently the secondary powder burning, form pulse once more and act on duct and stratum, prolong seam and expand seam; Change the purpose of reach cleaning duct, de-plugging, make seam, prolong seam, expansion being stitched through three times the negative pressure continuous pressure that just is depressed into like this.But there are three defectives in present multistage pulses perforating gun: the one, in the multistage pulses perforating gun is gone into the well process, because rifle body and wall friction, may destroy the blanking plug of relief hole on the rifle body, and cause multistage pulses perforating gun seepage and do over again; The 2nd, perforation finishes, and the blanking plug on the rifle body falls in the oil gas well, causes the oil gas well to pollute; The 3rd, former multistage pulses perforating gun structure can not be born the above high pressure of 35Mpa, can not be used for operation in deep-well, the high-pressure well, has influenced its range of application.
The content of utility model
The purpose of this utility model is to provide a kind of double blinding hole multistage pulses perforating gun, by improving lance body structure, replace former relief hole with blind hole, solved that employing blanking plug rifle body is easily intake, formed trouble of lost tool in hole behind the perforation, problems such as the static pressure index is low, requirement on machining accuracy height, make the withstand voltage 70Mpa of reaching of rifle body, and do not form trouble of lost tool in hole, more efficient safer.
The utility model adopts following technical scheme, it is a kind of double blinding hole multistage pulses perforating gun, constitute by rifle body pipe, firing mount, blind hole and perforating bullet, rifle body pipe is cylindric, firing mount is fixed in the rifle body pipe, it is characterized in that rifle body pipe outer wall has blind hole, have the perforation blind hole on the outer wall of perforating bullet transmit direction rifle body pipe, the perforating bullet afterbody has the pressure release blind hole on the rifle body pipe outer wall of direction.
Above-mentioned blind hole diameter generally is controlled at diameter 30-35 millimeter, the perforating gun wall blind hole thickness amount of leaving at 2 to 3 millimeters, and the blind hole bottom has fillet, realizes by mechanical processing tools.
The perforation blind hole of the outer wall setting of rifle body pipe is a jet resistance when reducing perforation, increases to penetrate and wears the degree of depth; The pressure release blind hole is the high pressure that two-stage gunpowder sequential combustion produces when being used for discharging the multistage pulses perforation, and acts on the perforation tunnel on stratum.
During double blinding of the present utility model hole multistage pulses perforating gun operation, the double blinding hole is airtight, and after the igniting of ground, the multistage pulses perforating gun is detonated, the perforating bullet emission, at first penetrate out the perforation blind hole, the perforation pulse is penetrated and is worn pipe, cement sheath enters the stratum, two-stage gunpowder in the multistage pulses perforating gun that ignites simultaneously, the high pressure that produces behind the powder burning is washed the pressure release blind hole on the rifle body open, pressure enters in the well through the pressure release blind hole, and two-stage pulse sequential action realizes the purpose of perforating and fracturing in the stratum.Simultaneously, can also effectively prevent the generation of accidents such as trouble of lost tool in hole, fried rifle.
The utility model has solved that the rifle body is easily intake, form problem such as trouble of lost tool in hole behind the perforation, has improved anti-static pressure index, uses safer more efficient.
Description of drawings
Fig. 1 is the partial structurtes lateral view of double blinding hole multistage pulses perforating gun;
Fig. 2 is the rifle body tube section figure of double blinding hole multistage pulses perforating gun;
In the drawings: rifle body pipe 1, firing mount 2, perforating bullet 3, perforation blind hole 4, pressure release blind hole 5.
The specific embodiment
Below in conjunction with accompanying drawing, structure of the present utility model is further specified, double blinding hole multistage pulses perforating gun as shown in Figure 1, constitute by rifle body pipe 1, firing mount 2, blind hole and perforating bullet 3, rifle body pipe 1 is cylindric, and firing mount 2 is fixed in the rifle body pipe 1, it is characterized in that the outer wall of rifle body pipe 1 has blind hole, have perforation blind hole 4 on the rifle body pipe outer wall of perforating bullet 3 transmit directions, perforating bullet 3 afterbodys have pressure release blind hole 5 on rifle body pipe 1 outer wall of direction.Above-mentioned blind hole diameter is that blind hole thickness is 2 millimeters on 30 millimeters, perforating gun tube wall.
Claims (3)
1. double blinding hole multistage pulses perforating gun, constitute by rifle body pipe (1), firing mount (2), blind hole and perforating bullet (3), rifle body pipe (1) is cylindric, firing mount (2) is fixed in the rifle body pipe (1), the outer wall that it is characterized in that rifle body pipe (1) has blind hole, have perforation blind hole (4) on the rifle body pipe outer wall of perforating bullet (3) transmit direction, perforating bullet (3) afterbody has pressure release blind hole (5) on rifle body pipe (1) outer wall of direction.
2. double blinding as claimed in claim 1 hole multistage pulses perforating gun is characterized in that described blind hole diameter blind hole thickness on 30～35 millimeters, perforating gun tube wall is 2～3 millimeters.
3. double blinding as claimed in claim 1 hole multistage pulses perforating gun is characterized in that described blind hole bottom has fillet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020685609 CN201991504U (en) | 2010-12-23 | 2010-12-23 | Double-blind-hole multi-stage pulse perforating gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020685609 CN201991504U (en) | 2010-12-23 | 2010-12-23 | Double-blind-hole multi-stage pulse perforating gun |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201991504U true CN201991504U (en) | 2011-09-28 |
Family
ID=44667994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020685609 Expired - Lifetime CN201991504U (en) | 2010-12-23 | 2010-12-23 | Double-blind-hole multi-stage pulse perforating gun |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201991504U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104086340A (en) * | 2014-07-23 | 2014-10-08 | 中国石油大学(华东) | Multistage burning rate gunpowder capable of implementing multistage pulse high-energy gas fracturing |
-
2010
- 2010-12-23 CN CN 201020685609 patent/CN201991504U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104086340A (en) * | 2014-07-23 | 2014-10-08 | 中国石油大学(华东) | Multistage burning rate gunpowder capable of implementing multistage pulse high-energy gas fracturing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191231 Address after: 100120 Beijing Xicheng District six laying Kang Co-patentee after: China National Petroleum Group Logging Co., Ltd. Patentee after: PetroChina Natural Gas Group Co., Ltd. Address before: 300457 science and Technology Development Office of Bohai Drilling Engineering Co., Ltd. No. 106 Huang Hai Road, Tianjin Development Zone Patentee before: CNPC Bohai Drilling Engineering Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110928 |