CA2836447A1 - Structure for gunpowder charge in combined fracturing perforating devices - Google Patents
Structure for gunpowder charge in combined fracturing perforating devices Download PDFInfo
- Publication number
- CA2836447A1 CA2836447A1 CA2836447A CA2836447A CA2836447A1 CA 2836447 A1 CA2836447 A1 CA 2836447A1 CA 2836447 A CA2836447 A CA 2836447A CA 2836447 A CA2836447 A CA 2836447A CA 2836447 A1 CA2836447 A1 CA 2836447A1
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- Prior art keywords
- box
- gunpowder
- charge
- box unit
- claws
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Classifications
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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
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
- Purses, Travelling Bags, Baskets, Or Suitcases (AREA)
Abstract
A powder charging structure of a composite fracturing perforation device comprises one or two box body units (2, 4), wherein a box cover (3, 42) is mounted at an opening end of the box body unit (2, 4), powder is charged into an inner cavity of the box body unit (2, 4), a claw (21, 22, 41) is disposed at an inner side of the box body unit (2, 4), and the claw (21, 22, 41) is locked in a locking groove (1) or a locking hole of a cartridge (1). The structure is used for charging of second stage powder of a composite fracturing perforation device. Since a single powder box (2, 4) is adopted, or two single powder boxes (2, 4) are connected through a flexible connecting belt (5), during packing, the two connected powder boxes (2, 4) may be unfolded, thereby improving the packing density of the powder boxes (2, 4), and saving expenses on packing, storage and transportation.
Description
From: Cory Furman Fax: Furman IP: +1 (306) 992-0739 To: CIPO Mailroom Fax: +1 (819) 953-2476 Page 9 of 1411(2612013 10:10 STRUCTURE FOR GUNPOWDER CHARGE IN COMBINED FRACTURING
PERFORATING DEVICES
[001] This application claims the priority of Chinese Application 201020684805.X, filed December 29, 2010, entitled "STRUCTURE FOR GUNPOWDER CHARGE IN
COMBINED FRACTURING PERFORATING DEVICES. The entire content of this application is incorporated by reference into this application.
FIELD OF THE INVENTION
PERFORATING DEVICES
[001] This application claims the priority of Chinese Application 201020684805.X, filed December 29, 2010, entitled "STRUCTURE FOR GUNPOWDER CHARGE IN
COMBINED FRACTURING PERFORATING DEVICES. The entire content of this application is incorporated by reference into this application.
FIELD OF THE INVENTION
[002] The present invention relates to the field of oil exploration and exploitation, particularly to a structure for gunpowder charge in combined fracturing perforation devices.
BACKGROUND OF THE INVENTION
BACKGROUND OF THE INVENTION
[003] In the field of exploration and exploitation of oil and gas wells, combined perforation technology is widely used in the well completion process as an effective method to increase productivity. However, as the techniques for exploitation of oil and gas wells become more developed, oil reservoirs having low permeability, ultra-low permeability, or oil reservoirs that are difficult to draw on are exploited one after another.
Conventional combined perforation technologies do not have a good effect on increasing the productivity of these types of oil reservoirs due to the limited charge volume and the low energy. Chinese Patent CN20156803.8 disclosed a combined fracturing perforation device having two types of gunpowder mounted on the cylindrical charge frame, wherein the primary gunpowder mounted in the shells inside the charge frame is columnar in shape, and the secondary gunpowder mounted outside the charge frame is cylindrical in shape. The problems associated with this device are:
(1) When the cylindrical secondary gunpowder is being mounted, the retaining ring at one of the ends of the charge frame must be removed to one by one fit the individual cylinders.
This process is complex and low-efficient. (2) The cylindrical secondary gunpowder occupies a relatively large space during packaging and transport such that they are inconvenient and expensive to store and transport.
SUMMARY OF INVENTION
Conventional combined perforation technologies do not have a good effect on increasing the productivity of these types of oil reservoirs due to the limited charge volume and the low energy. Chinese Patent CN20156803.8 disclosed a combined fracturing perforation device having two types of gunpowder mounted on the cylindrical charge frame, wherein the primary gunpowder mounted in the shells inside the charge frame is columnar in shape, and the secondary gunpowder mounted outside the charge frame is cylindrical in shape. The problems associated with this device are:
(1) When the cylindrical secondary gunpowder is being mounted, the retaining ring at one of the ends of the charge frame must be removed to one by one fit the individual cylinders.
This process is complex and low-efficient. (2) The cylindrical secondary gunpowder occupies a relatively large space during packaging and transport such that they are inconvenient and expensive to store and transport.
SUMMARY OF INVENTION
[004] This invention provides a structure for gunpowder charge for charging of secondary gunpowder in combined fracturing perforation devices that is convenient to mount and transport.
PAGE 9114 RCVD AT 11126/2013 11:20:37 AM [Eastern Standard Time]
SVR:F00003/22* DNIS:3905* CSID:6506556633 " DURATION (mm-ss):10-04 From: Cony Furman Fax. Furman IP: +1 (306) 992-0739 To: CIPO Mailroom Fax: +1 (819) 953-2476 Page 1001 1411(2612013 10:10 [005] The technical solution to the aforesaid problem is: to provide a structure for gunpowder charge in combined fracturing perforation devices comprising one or two box units having box covers mounted on the open end of the box units, wherein gunpowder is charged into an inner cavity of the box unit and the inner side of the box unit has a claw that is locked in a groove or an installation hole of the charge frame.
[ 006] The structure for gunpowder charge provided by the present invention can be in the following two forms at the discretion of the user.
[007] In the first form, the structure for gunpowder charge comprises one box unit having three claws at the inner side of the box unit which are locked into the grooves in the charge frame. In this case, the best locations for the claws are: two of the three claws are each at the edge of the two sides of the upper end of the box unit, and the other claw is .at the center of the lower end of the box unit.
[ 008] The preferred embodiment for said three claws is L-shaped claw.
[009] In the second form, the structure for gunpowder charge comprises two box units which are connected to form a whole through a flexible belt. Each box unit has claws at the inner side of the box unit which can lock into the installation holes of the charge frame.
[010] The preferred embodiment for the box units: Each of the box units has two claws at the inner side of the box unit separately positioned at the free end of the box unit.
[ 011] The preferred embodiment for said claws is V-shaped claw.
[012] In comparison with the prior art, the present invention has a simple structure.
Since the box unit for gunpowder charging (i.e., gunpowder box) is connected to the charge frame through claws, the box units can be rapidly and conveniently mounted such that the assembling efficiency is significantly increased. With the use of single gunpowder boxes or unfolding of the structures formed by connection of two single gunpowder boxes with a flexible belt during packaging, the packing density of the gunpowder boxes is increased and the costs for packaging, storage and transport are reduced.
BRIEF DESCRIPTION OF THE FIGURES
[013] Figure 1 shows the perspective view of Example 1 of the present invention.
[014] Figure 2 shows the cross-sectional view of Figure 1.
[015] Figure 3 shows the perspective view of the box cover of the gunpowder box of Example 1.
PAGE 10114 * RCVD AT 1112612013 11:20:37 AM [Eastern Standard Time] *
SVR:F00003122* DNIS:3905 CSID:6506556633 " DURATION (mm-ss):10-04 From: Coi y Furman Fax. Furman IP: +1 (306) 992-0739 To: CIPO Mailroom Fax: +1 (819) 953-2476 Page 11 of 1411/26(2013 10:10 [016] Figure 4 shows the perspective view of the gunpowder charging box unit of Example 1 assembled with the charge frame.
[017] Figure 5 shows the view from "A" direction of Figure 4.
[018] Figure 6 shows the perspective view of example 2 of the present invention.
[019] Figure 7 shows the axial view of Example 2.
[020] Figure 8 shows the perspective view of the gunpowder charging box unit of Example 2 assembled with the charge frame.
DETAILED DESCRIPTION OF THE INVENTION
[021] The embodiments of the present invention will be described in details with reference to the accompanying drawings.
[022] As shown in Figs. 1-5, a single gunpowder box is used in the structure for gunpowder charge, i.e., the structure for gunpowder charge comprises one box unit The projection of the structure of box unit 2 is T-shaped and is bent to a circular-arc shape with the inner side of the box unit matching to the outer cylindrical surface of the cylindrical charge frame 1. The inner side of the box unit 2 has three claws 21, 22, wherein the two claws 21 are at the two edges of the two sides of the upper end of the box unit 2 while claw 22 is at the center of the lower end of the box unit 2.
All the three claws are L-shaped, and lock into the groove 11 in the charge frame 1 (See Fig. 4). The big end of the box unit 2 is mounted with box cover 3. The box cover 3 has four wedge-shaped projections 31 which form a wedge-shaped buckle assembly with the buckle hole on the box unit During mounting, the inner side of the box unit is abutted to the outer surface of the charge frame to allow the claws to align with the groove of the charge frame and to slide along the groove, so that the gunpowder box can be mounted and hung on the charge frame and the perforating charge will prevent them from falling back after the perforating charges are mounted.
[022] As shown in Figs. 6-8, the structure for gunpowder charge comprises two T-shaped box units 4 i.e. it is formed by connecting two single gunpowder boxes. The big ends of the two T-shaped box units 4 are directed to opposite directions and the two T-shaped box body units are connected at one of the sides through a flexible belt 5 made from polymeric material with the other side being free. The cross-section is C-shaped.
PAGE 11/14' RCVD AT 11126/2013 11:20:37 AM [Eastern Standard Time]' SVR:F00003122* DNIS:3905* CSID:6506556633 " DURATION (mm-ss):10-04 orn: Cory Furman Fax: Furman IP: +1 (306) 992-0739 To: CIPO Mailroom Fax: +1 (819) 953-2476 Page 12of 14 11126/2013 10:10 The free end of each of the box unit has two claws 41 which are locked in the installation holes of the charge frame. The structure of the box cover 42 is the same as Example 1. For this kind of structure, it is preferable to use V-shaped claws.
The flexible belt 5 can bend and unfold, thereby reduces the space occupied due to packaging. During mounting, the four claws are only required to lock into the holes of the charge frame 1, as shown in Fig. 8.
PAGE 12114 " RCVD AT 1112612013 11:20:37 AM (Eastern Standard Time] *
SVR:F00003122* DNIS:3905* CSID:6506556633 * DURATION (mm-ss):10-04
PAGE 9114 RCVD AT 11126/2013 11:20:37 AM [Eastern Standard Time]
SVR:F00003/22* DNIS:3905* CSID:6506556633 " DURATION (mm-ss):10-04 From: Cony Furman Fax. Furman IP: +1 (306) 992-0739 To: CIPO Mailroom Fax: +1 (819) 953-2476 Page 1001 1411(2612013 10:10 [005] The technical solution to the aforesaid problem is: to provide a structure for gunpowder charge in combined fracturing perforation devices comprising one or two box units having box covers mounted on the open end of the box units, wherein gunpowder is charged into an inner cavity of the box unit and the inner side of the box unit has a claw that is locked in a groove or an installation hole of the charge frame.
[ 006] The structure for gunpowder charge provided by the present invention can be in the following two forms at the discretion of the user.
[007] In the first form, the structure for gunpowder charge comprises one box unit having three claws at the inner side of the box unit which are locked into the grooves in the charge frame. In this case, the best locations for the claws are: two of the three claws are each at the edge of the two sides of the upper end of the box unit, and the other claw is .at the center of the lower end of the box unit.
[ 008] The preferred embodiment for said three claws is L-shaped claw.
[009] In the second form, the structure for gunpowder charge comprises two box units which are connected to form a whole through a flexible belt. Each box unit has claws at the inner side of the box unit which can lock into the installation holes of the charge frame.
[010] The preferred embodiment for the box units: Each of the box units has two claws at the inner side of the box unit separately positioned at the free end of the box unit.
[ 011] The preferred embodiment for said claws is V-shaped claw.
[012] In comparison with the prior art, the present invention has a simple structure.
Since the box unit for gunpowder charging (i.e., gunpowder box) is connected to the charge frame through claws, the box units can be rapidly and conveniently mounted such that the assembling efficiency is significantly increased. With the use of single gunpowder boxes or unfolding of the structures formed by connection of two single gunpowder boxes with a flexible belt during packaging, the packing density of the gunpowder boxes is increased and the costs for packaging, storage and transport are reduced.
BRIEF DESCRIPTION OF THE FIGURES
[013] Figure 1 shows the perspective view of Example 1 of the present invention.
[014] Figure 2 shows the cross-sectional view of Figure 1.
[015] Figure 3 shows the perspective view of the box cover of the gunpowder box of Example 1.
PAGE 10114 * RCVD AT 1112612013 11:20:37 AM [Eastern Standard Time] *
SVR:F00003122* DNIS:3905 CSID:6506556633 " DURATION (mm-ss):10-04 From: Coi y Furman Fax. Furman IP: +1 (306) 992-0739 To: CIPO Mailroom Fax: +1 (819) 953-2476 Page 11 of 1411/26(2013 10:10 [016] Figure 4 shows the perspective view of the gunpowder charging box unit of Example 1 assembled with the charge frame.
[017] Figure 5 shows the view from "A" direction of Figure 4.
[018] Figure 6 shows the perspective view of example 2 of the present invention.
[019] Figure 7 shows the axial view of Example 2.
[020] Figure 8 shows the perspective view of the gunpowder charging box unit of Example 2 assembled with the charge frame.
DETAILED DESCRIPTION OF THE INVENTION
[021] The embodiments of the present invention will be described in details with reference to the accompanying drawings.
[022] As shown in Figs. 1-5, a single gunpowder box is used in the structure for gunpowder charge, i.e., the structure for gunpowder charge comprises one box unit The projection of the structure of box unit 2 is T-shaped and is bent to a circular-arc shape with the inner side of the box unit matching to the outer cylindrical surface of the cylindrical charge frame 1. The inner side of the box unit 2 has three claws 21, 22, wherein the two claws 21 are at the two edges of the two sides of the upper end of the box unit 2 while claw 22 is at the center of the lower end of the box unit 2.
All the three claws are L-shaped, and lock into the groove 11 in the charge frame 1 (See Fig. 4). The big end of the box unit 2 is mounted with box cover 3. The box cover 3 has four wedge-shaped projections 31 which form a wedge-shaped buckle assembly with the buckle hole on the box unit During mounting, the inner side of the box unit is abutted to the outer surface of the charge frame to allow the claws to align with the groove of the charge frame and to slide along the groove, so that the gunpowder box can be mounted and hung on the charge frame and the perforating charge will prevent them from falling back after the perforating charges are mounted.
[022] As shown in Figs. 6-8, the structure for gunpowder charge comprises two T-shaped box units 4 i.e. it is formed by connecting two single gunpowder boxes. The big ends of the two T-shaped box units 4 are directed to opposite directions and the two T-shaped box body units are connected at one of the sides through a flexible belt 5 made from polymeric material with the other side being free. The cross-section is C-shaped.
PAGE 11/14' RCVD AT 11126/2013 11:20:37 AM [Eastern Standard Time]' SVR:F00003122* DNIS:3905* CSID:6506556633 " DURATION (mm-ss):10-04 orn: Cory Furman Fax: Furman IP: +1 (306) 992-0739 To: CIPO Mailroom Fax: +1 (819) 953-2476 Page 12of 14 11126/2013 10:10 The free end of each of the box unit has two claws 41 which are locked in the installation holes of the charge frame. The structure of the box cover 42 is the same as Example 1. For this kind of structure, it is preferable to use V-shaped claws.
The flexible belt 5 can bend and unfold, thereby reduces the space occupied due to packaging. During mounting, the four claws are only required to lock into the holes of the charge frame 1, as shown in Fig. 8.
PAGE 12114 " RCVD AT 1112612013 11:20:37 AM (Eastern Standard Time] *
SVR:F00003122* DNIS:3905* CSID:6506556633 * DURATION (mm-ss):10-04
Claims (7)
1. A structure for gunpowder charge in combined fracturing perforating devices, comprising one or two box units having box covers mounted on the open end of the box units, wherein gunpowder is charged into an inner cavity of the box unit and the inner side of the box unit has a claw that is locked in a groove or an installation hole of the charge frame.
2 The structure for gunpowder charge of claim 1, comprising one box unit having three claws at the inner side of the box unit which are locked into the grooves in the charge frame
3 The structure for gunpowder charge of claim 2, wherein two of said there claws are at the two edges of the two sides of the upper end of the box unit while the other claw is at the center of the lower end of the box unit.
4 The structure for gunpowder charge of claim 2 or 3, wherein said three claws are L-shaped
5. The structure for gunpowder charge of claim 1, comprising two box units which are connected to form a whole through a flexible belt wherein each box unit has claws at the inner side of the box unit which can lock into the installation holes of the charge frame
6 The structure for gunpowder charge of claim 5, wherein each of the box units has two claws at the inner side of the box unit separately positioned at the free end of the box unit
7 The structure for gunpowder change of claim 5 or 6, wherein said claws arc V-shaped.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020684805 CN201934084U (en) | 2010-12-29 | 2010-12-29 | Gunpowder charging structure of compound fracturing and perforating device |
| CN201020684805.X | 2010-12-29 | ||
| PCT/CN2011/083112 WO2012088984A1 (en) | 2010-12-29 | 2011-11-29 | Powder charging structure of composite fracturing perforation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2836447A1 true CA2836447A1 (en) | 2012-07-05 |
| CA2836447C CA2836447C (en) | 2016-08-23 |
Family
ID=44445606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2836447A Active CA2836447C (en) | 2010-12-29 | 2011-11-29 | Structure for gunpowder charge in combined fracturing perforating devices |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN201934084U (en) |
| CA (1) | CA2836447C (en) |
| WO (1) | WO2012088984A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201934084U (en) * | 2010-12-29 | 2011-08-17 | 西安通源石油科技股份有限公司 | Gunpowder charging structure of compound fracturing and perforating device |
| US9027667B2 (en) | 2009-11-11 | 2015-05-12 | Tong Oil Tools Co. Ltd. | Structure for gunpowder charge in combined fracturing perforation device |
| CN102052068B (en) | 2009-11-11 | 2013-04-24 | 西安通源石油科技股份有限公司 | Method and device for composite fracturing/perforating for oil/gas well |
| CN102094613A (en) | 2010-12-29 | 2011-06-15 | 西安通源石油科技股份有限公司 | Composite perforating method and device carrying support agent |
| CN102410006B (en) * | 2011-12-15 | 2014-05-07 | 西安通源石油科技股份有限公司 | Explosive loading structure for multi-stage composite perforating device |
| US9297242B2 (en) | 2011-12-15 | 2016-03-29 | Tong Oil Tools Co., Ltd. | Structure for gunpowder charge in multi-frac composite perforating device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5355802A (en) * | 1992-11-10 | 1994-10-18 | Schlumberger Technology Corporation | Method and apparatus for perforating and fracturing in a borehole |
| US5598891A (en) * | 1994-08-04 | 1997-02-04 | Marathon Oil Company | Apparatus and method for perforating and fracturing |
| CN100491692C (en) * | 2005-09-15 | 2009-05-27 | 广意协力石油技术开发（北京）有限公司 | Compound perforator without body |
| CN2821154Y (en) * | 2005-09-15 | 2006-09-27 | 西安聚和石油技术开发有限公司 | Composite hole punching device for module type medicine box holding medicine |
| CN201934084U (en) * | 2010-12-29 | 2011-08-17 | 西安通源石油科技股份有限公司 | Gunpowder charging structure of compound fracturing and perforating device |
| CN201568038U (en) * | 2009-11-11 | 2010-09-01 | 西安通源石油科技股份有限公司 | Composite fracturing and perforating device for oil and gas well |
-
2010
- 2010-12-29 CN CN 201020684805 patent/CN201934084U/en not_active Expired - Lifetime
-
2011
- 2011-11-29 WO PCT/CN2011/083112 patent/WO2012088984A1/en active Application Filing
- 2011-11-29 CA CA2836447A patent/CA2836447C/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN201934084U (en) | 2011-08-17 |
| CA2836447C (en) | 2016-08-23 |
| WO2012088984A1 (en) | 2012-07-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20131126 |