CN203476307U - Double-cluster hydraulic jetting string - Google Patents
Double-cluster hydraulic jetting string Download PDFInfo
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- CN203476307U CN203476307U CN201320511796.8U CN201320511796U CN203476307U CN 203476307 U CN203476307 U CN 203476307U CN 201320511796 U CN201320511796 U CN 201320511796U CN 203476307 U CN203476307 U CN 203476307U
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- packer
- spray gun
- string
- sliding sleeve
- double
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Abstract
The utility model provides a double-cluster hydraulic jetting string which comprises a packer, a single-stage spray gun and a sliding sleeve spray gun, wherein the packer, the single-stage spray gun and the sliding sleeve spray gun are sequentially arranged on the string, the packer is arranged at one end of the string, and the single-stage spray gun is arranged between the packer and the sliding sleeve spray gun. The double-cluster hydraulic jetting string is characterized in that the packer is provided with a check valve. The packer is a CTY-211 packer. The double-cluster hydraulic jetting string overcomes the defects that in double-cluster fracturing of an existing horizontal oil well, a string is frequently assembled and disassembled, a drilling tool is frequently replaced, auxiliary time in construction is long, risks in the process of assembling and disassembling the string are high, and the environment is polluted.
Description
Technical field
The utility model relates to oil well fracturing operation technical field, is specifically related to two bunch jetting tubing strings and two bunches of jetting annular fracturing methods.
Background technology
In the past few years, from " volume fracturing " theory, carried out the two bunch hydraulic jetting fracturings of horizontal well, the microseism band of its formation supplements overlapping again mutually, can increase the drainage volume of oil well horizontal well.Correctional effect is further improved.Increase, well depth increase along with the oil well horizontal well jetting pressing crack construction number of plies, be subject to the impact of packer setting performance and spraycan abrasion-resistance, at present two bunch spraycans can not farthest be brought into play, cause rising frequently in work progress lower tubular column, change drilling tool, increase the non-cutting time of construction, and increased risk and the environment pollution in a lower tubular column process.
Specifically, at present, in two bunch pressure breaks of oil well horizontal well, the defect of existence is: 1. the material property of end packer determines that its restting number of times can be not a lot, the 2. jeting effect of spray gun as above spray gun not below, and easily cause sand plug.3. more risks that can increase accident of the number of times of handling tubing string.4. fracturing fluid enters from oil pipe, and discharge capacity can be restricted.
Utility model content
The purpose of this utility model is to provide a kind of two bunch jetting tubing strings and two bunches of jetting annular fracturing methods, overcome two existing lower tubular columns that rise frequently of bunch pressure break of current oil well horizontal well, change drilling tool, the non-cutting time of construction is long, having a big risk and the defect of environment pollution in lower tubular column process.
For this reason, the utility model provides a kind of two bunch jetting tubing string, comprise the packer, single-stage spray gun and the sliding sleeve spray gun that are arranged in turn on tubing string, and packer is arranged on the end, one end of this tubing string, single-stage spray gun is arranged between packer and sliding sleeve spray gun, it is characterized in that: described packer is the packer that carries ball-and-seat.
Described packer is CTY-211 packer.
The beneficial effects of the utility model are: the CTY-211 packer of employing has good heat resisting and pressure resisting and restting performance, extended application life, sliding sleeve spray gun normal condition belongs to opening, facilitates perforation, when pressure break is carried out, due to handling tubing string packer setting, sliding sleeve spray gun belongs to closed condition, has reduced the possibility of sand plug between single-stage spray gun and sliding sleeve spray gun, reduces frictional resistance, improve discharge capacity, the life-span of greatly improving nozzle; Reduced of the fracturing fluid performance requirement, by annular fracturing and oil pipe pressure break, carried out simultaneously, improved the efficiency of pressure break, once the lower multiple fracturing of boring, reduces dangerous generation.
Accompanying drawing explanation
Below with reference to accompanying drawing, the utility model is described in further details:
Fig. 1 is two bunch jetting tubular column structure schematic diagrames.
1, packer; 2, single-stage spray gun; 3, sliding sleeve spray gun; 4, tubing string; 5, centralizer.
The specific embodiment
In order to overcome two existing lower tubular columns that rise frequently of bunch pressure break of current oil well horizontal well, change drilling tool, the non-cutting time of construction is long, having a big risk and the defect of environment pollution in a lower tubular column process.
For this reason, the utility model provides the two bunch jetting tubing strings shown in a kind of Fig. 1, the outer end that comprises the packer 1(packer 1 being arranged in turn on tubing string is provided with centralizer 5), single-stage spray gun 2 and sliding sleeve spray gun 3, and packer 1 is arranged on the end, one end of this tubing string 4, single-stage spray gun 2 is arranged between packer 1 and sliding sleeve spray gun 3, packer 1 is the CTY-211 packer that carries ball-and-seat, and its packing element high temperature high voltage resistant has extended application life of instrument.
Provide the two bunch jetting tubing strings of a kind of utilization to carry out two bunch jetting annular fracturing methods simultaneously, comprised the following steps:
1), tubing string is carried out to through wash well, well-flushing is consistent to importing and exporting water colour, wellbore pressure test 20Mpa, and voltage stabilizing 30min, pressure drop is no more than 0.7Mpa;
2), by tubing string, connect in turn packer 1, single-stage spray gun 2 and sliding sleeve spray gun 3, and packer 1 is arranged on the end, bottom of this tubing string, single-stage spray gun 2 is arranged between packer 1 and sliding sleeve spray gun 3, complete the assembling of two bunch jetting tubing strings, then will assemble the two bunch jetting tubing strings design attitude of going into the well, well head and surface line are installed, and pressure testing;
3), make sliding sleeve spray gun 3 in running order, guarantee that packer 1 is in the non-state that sets, to pumping liquid in tubing string, make the liquid of 2 li of sliding sleeve spray gun 3 and single-stage spray guns form high-speed jet and carry out perforation;
4), treat that perforation finishes, 1.5 meters, upper lifting pipe post, then transfers, until pressure meter shows that pressure is changed to 8～10 tons, prove that packer 1 sets, and then sits well head, sliding sleeve spray gun 3 is in blocked state after upper lifting pipe post, injects sand liquid simultaneously carry out pressure break from oil jacket annular space and oil pipe.
After pressure break finishes, by from oil pipe filling liquid then from oil jacket annular space fluid, come cleaning tubing and oil jacket annular space (space between oil pipe external diameter and casing inner diameter).
In step 1), tubing string being carried out to through wash well is to utilize the drift size gauge tool of φ 118mm to carry out drifting to artificial bottom of a well.
In sum, be not difficult to find out, two bunch jetting tubing strings and two bunches of jetting annular fracturing methods that the present embodiment provides, because CTY-211 packer carries ball-and-seat device, so can make the liquid formation high-speed jet in sliding sleeve spray gun and single-stage spray gun carry out perforation by the pressure increasing in discharge capacity increase oil pipe.Treat that perforation finishes, 1.5 meters, upper lifting pipe post, then transfers, until pressure meter shows that pressure is changed to 8～10 tons, proof packer setting, then sits after well head upper lifting pipe post sliding sleeve spray gun in blocked state, injects sand liquid simultaneously carry out pressure break from oil jacket annular space and oil pipe.The sand liquid of oil pipe can only carry out pressure break and can prevent sand plug by single-stage spray gun below, reduce frictional resistance, the life-span of greatly improving nozzle.Oil jacket annular space can carry out the pressure break of large discharge capacity, has improved the efficiency of pressure break, and once the lower multiple fracturing of boring, reduces dangerous generation.After pressure break finishes by then coming cleaning tubing and oil jacket annular space (space between oil pipe external diameter and casing inner diameter) from oil jacket annular space fluid from oil pipe filling liquid.
More than exemplifying is only to illustrate of the present utility model, does not form the restriction to protection domain of the present utility model, within the every and same or analogous design of the utility model all belongs to protection domain of the present utility model.
The parts that the present embodiment does not describe in detail and structure belong to well-known components and common structure or the conventional means of the industry, here not narration one by one.
Claims (2)
1. pair bunch jetting tubing string, comprise the packer (1), single-stage spray gun (2) and the sliding sleeve spray gun (3) that are arranged in turn on tubing string, and packer (1) is arranged on the end, one end of this tubing string, single-stage spray gun (2) is arranged between packer (1) and sliding sleeve spray gun (3), it is characterized in that: described packer (1) is the packer that carries ball-and-seat.
2. two bunch jetting tubing string as claimed in claim 1, is characterized in that: described packer (1) is CTY-211 packer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320511796.8U CN203476307U (en) | 2013-08-21 | 2013-08-21 | Double-cluster hydraulic jetting string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320511796.8U CN203476307U (en) | 2013-08-21 | 2013-08-21 | Double-cluster hydraulic jetting string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203476307U true CN203476307U (en) | 2014-03-12 |
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ID=50224654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320511796.8U Expired - Fee Related CN203476307U (en) | 2013-08-21 | 2013-08-21 | Double-cluster hydraulic jetting string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203476307U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470241A (en) * | 2013-08-21 | 2013-12-25 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Dual-cluster hydraulic jet tubular column and dual-cluster hydraulic jet annulus fracturing method |
-
2013
- 2013-08-21 CN CN201320511796.8U patent/CN203476307U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470241A (en) * | 2013-08-21 | 2013-12-25 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Dual-cluster hydraulic jet tubular column and dual-cluster hydraulic jet annulus fracturing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140312 Termination date: 20190821 |
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| CF01 | Termination of patent right due to non-payment of annual fee |