CN105986799B - Ball seat packing multi-cluster perforation fracturing string and construction method - Google Patents
Ball seat packing multi-cluster perforation fracturing string and construction method Download PDFInfo
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- CN105986799B CN105986799B CN201510090783.1A CN201510090783A CN105986799B CN 105986799 B CN105986799 B CN 105986799B CN 201510090783 A CN201510090783 A CN 201510090783A CN 105986799 B CN105986799 B CN 105986799B
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- 238000010276 construction Methods 0.000 title claims abstract description 15
- 238000012856 packing Methods 0.000 title claims abstract description 5
- 230000009466 transformation Effects 0.000 claims abstract description 69
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000004090 dissolution Methods 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000000903 blocking effect Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 73
- 239000000463 material Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 238000005553 drilling Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 230000008014 freezing Effects 0.000 description 4
- 238000007710 freezing Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 210000000664 rectum Anatomy 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
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Abstract
The invention provides a ball seat packing multi-cluster perforation fracturing string and a construction method. The invention discloses a ball seat packing multi-cluster perforation fracturing string, which comprises: the system comprises a well completion casing, a perforation pipe string, a ball seat and a dissolving ball; the inner wall of the well completion casing is provided with a limiting part at the corresponding position between the adjacent transformation layers; the perforating pipe string, the ball seat and the dissolving ball are all positioned in the completion casing; the perforating pipe string is connected with the ball seat and used for controlling and delivering the ball seat; the ball seat is used for holding and dissolves the ball, and the ball seat compresses tightly spacing part in order to fix the shutoff layer between the adjacent transformation layer of completion sleeve pipe in formation, and wherein, it is dissoluble after meeting water and reaching the predetermined time to dissolve the ball. The invention does not need to drill and remove the ball seat and the dissolving ball on the blocking layer by using the drill bit, thereby avoiding the situation that the drill bit is blocked and the drill bit damages the sleeve. In addition, the construction time and the construction cost are saved.
Description
Technical field
More cluster perforating and fracturing tubing strings are insulated the present invention relates to oil-gas field fracturing renovation technique more particularly to a kind of ball seat and are applied
Work method.
Background technique
Currently, the pressure break mode of oil gas field multilayer mainly has fixed tubular column hydraulic sand blasting pressure break, open hole packer pressure break is dragged
Coiled tubing underseal, back-up sand pressure break and waterpower pumping drilling bridging plug pressure break of dynamic tubing string etc..
Wherein, the method for waterpower pumping drilling bridging plug pressure break is: using hydraulic pump by perforating gun and drilling bridging plug
Waterpower is pumped in pit shaft, after drilling bridging plug is set and insulates pit shaft, then carries out perforation, fracturing work, and the later period will
Drilling bridging plug bores the latus rectum up and down removed to realize different oil-gas Layers in pit shaft.
When bore except operation to drilling bridging plug, not only consuming time is long, but also is easy to appear bit freezing, drill bit damage
The case where hurting casing.
Summary of the invention
The present invention provides a kind of ball seat and insulates more cluster perforating and fracturing tubing strings and construction method, to overcome present in the prior art
Defect.
The present invention provides a kind of ball seat and insulates more cluster perforating and fracturing tubing strings, comprising: completion casing, perforation pipe string, ball seat and
Dissolve ball；
Limiting component is provided at corresponding position between adjacent transformation layer on the completion casing inner wall；
The perforation pipe string, the ball seat and the dissolution ball are respectively positioned in the completion casing；
The perforation pipe string is connect with the ball seat, for controlling and delivering the ball seat；
The ball seat is for accommodating the dissolution ball, and the ball seat compresses the limiting component to be fixed on the complete well
The plugged zone between the adjacent transformation layer is formed in casing, wherein it is solvable that the dissolution ball meets ability after water reaches preset time
Solution.
Further, including 2 limiting components, 2 limiting components are with the central axis pair of the completion casing
Claim setting.
Further, the section of the ball seat is rounded, and the area of section from one end of the ball seat to the other end by
Cumulative big, wherein the small one end of area of section and the limiting component compress, and the big one end of area of section is provided with arc groove
To accommodate the dissolution ball.
Further, the perforation pipe string is expanded by cable, torpedo, head harness, magnetic locator, weighted lever, perforating gun, ball seat
Diameter tool, ball seat deliver tool and are sequentially connected composition.
Further, the perforating gun is more cluster perforating guns.
Further, the ball seat is delivered tool and is connect with the ball seat, for delivering the ball seat.
Further, the ball seat hole enlargement tool is connect with the ball seat, expanding for controlling the ball seat.
Further, it is provided with connector on the limiting component, it is corresponding described between the adjacent transformation layer
The holding tank of the connector is provided on inner wall at completion casing；
The connector is connected in the holding tank.
Further, it is provided with bolt on the limiting component, it is corresponding described complete between the adjacent transformation layer
Screw hole is provided on inner wall at casing；
The bolt is screwed onto the screw hole.
The present invention provides the construction method that a kind of ball seat insulates more cluster perforating and fracturing tubing strings, is suitable for ball seat described above and seals
Every more cluster perforating and fracturing tubing strings, this method comprises:
By in completion casing tripping in pit shaft, and reinforce the pit shaft, there is g sections of transformation layers in the pit shaft, wherein g be from
So number；
Clean the pit shaft；
Fracturing work is carried out to n-th section of transformation layer, wherein n is less than or equal to g, and n is natural number；
Using ground waterpower pump group by perforation pipe string and ball seat waterpower be pumped in completion casing n-th section of transformation layer with
Before limiting component between (n+1)th section of transformation layer；
The perforation pipe string controls that the ball seat is expanding, and launch it is expanding after ball seat；
Perforation is carried out to (n+1)th section of transformation layer using the perforation pipe string；
The perforation pipe string is proposed into the pit shaft；
Using the ground hydraulic pump by dissolve ball be pumped to it is described it is expanding after ball seat on, then will the dissolution ball and expansion
Ball seat after diameter is pumped to together on the limiting component between n-th section of transformation layer and (n+1)th section of transformation layer, forms envelope
Interlayer insulates n-th section of transformation layer；
Above-mentioned operation is repeated, until the g sections of transformation layer whole fracturing work is completed.
Further, the fracturing work is the operation of light casing fracturing or hydraulic jetting fracturing operation.
Further, the perforation is more shower holes.
Ball seat of the invention insulates more cluster perforating and fracturing tubing strings, by completion casing inner wall between adjacent transformation layer
Limiting component is respectively arranged at corresponding position；Perforation pipe string and ball seat waterpower well has been pumped to using ground waterpower pump group
Before limiting component in casing between adjacent transformation layer；It will by the ball seat hole enlargement tool that terrestrial contr controls perforation pipe string
Current ball seat is expanding, then control again perforation pipe string ball seat deliver tool will it is current it is expanding after ball seat launch and be detached from；It is logical
It crosses terrestrial contr and proposes perforation pipe string from the completion casing in pit shaft；It is pumped into using ground hydraulic pump by ball is dissolved
On ball seat after expanding, then by dissolve ball with it is expanding after ball seat together be pumped into it is adjacent transformation layer between limiting component on,
Sealing layer is formed, layer will currently be transformed and insulate.Wherein, the material of ball seat can be consistent with the dissolution material of ball, waits to be rebuilt
After layer has all been transformed, ball seat is gradually dissolved with dissolution ball with the water temperature recovery in pit shaft, and residue returns out ground, well with drain is returned
Cylinder fluid passage is established.It does not need to be removed plugged zone upper ball base and dissolution round bur with drill bit, has prevented bit freezing, bit breakage set
The case where pipe.In addition, also saving construction time and operating expenses.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 a is the structural schematic diagram that ball seat of the present invention insulates more cluster perforating and fracturing tubing string embodiments；
Fig. 1 b is the another structural schematic diagram that ball seat of the present invention insulates more cluster perforating and fracturing tubing string embodiments；
Fig. 2 is the perforation pipe string structure schematic diagram that ball seat of the present invention insulates more cluster perforating and fracturing tubing string embodiments；
Fig. 3 is the flow chart for the construction method embodiment that ball seat of the present invention insulates more cluster perforating and fracturing tubing strings.
Description of symbols:
11: completion casing；
12: perforation pipe string；
121: cable；
122: torpedo；
123: head harness；
124: magnetic locator；
125: weighted lever；
126: perforating gun；
127: ball seat hole enlargement tool；
128: ball seat delivers tool；
13: ball seat；
14: dissolution ball；
15: limiting component；
16: terrestrial contr.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Fig. 1 a is the structural schematic diagram that ball seat of the present invention insulates more cluster perforating and fracturing tubing string embodiments, and Fig. 1 b is the present invention
Ball seat insulates the another structural schematic diagram of more cluster perforating and fracturing tubing string embodiments.As shown in Figure 1 a, 1 b, the ball seat of the present embodiment
Insulating more cluster perforating and fracturing tubing strings 01 may include: completion casing 11, perforation pipe string 12, ball seat 13 and dissolution ball 14.It is described complete
Limiting component 15 is provided at corresponding position between adjacent transformation layer on 11 inner wall of casing；The perforation pipe string 12, institute
It states ball seat 13 and the dissolution ball 14 is respectively positioned in the completion casing 11；The perforation pipe string 12 is connect with the ball seat 13,
For controlling and delivering the ball seat 13；The ball seat 13 is for accommodating the dissolution ball 14, and described in the ball seat 13 compresses
Limiting component 15 is to be fixed on the plugged zone formed between the adjacent transformation layer in the completion casing 11, wherein described molten
Solution ball 14 is met after water reaches preset time and just be can dissolve.
For example, the dissolution ball 14 is less than or equal in 70 DEG C of water, in 5 hours can pressure stabilizing 70MPa, meet light casing
The demand of pressure break or hydraulic jetting fracturing operation to pressure is completely dissolved in 15 days in the water more than or equal to 70 DEG C.It waits
After transformation layer has all been transformed, dissolution ball 14 is gradually dissolved with the water temperature recovery in pit shaft, and residue returns out ground with drain is returned.This
In it should be noted that dissolution ball 14 material can be configured according to actual needs, be not limited herein.
Optionally, 2 are provided on 11 inner wall of the completion casing between adjacent transformation layer at corresponding position
The limiting component 15,2 limiting components 15 are with the setting substantially symmetrical about its central axis of the completion casing 11, such as Fig. 1 a, Fig. 1 b
In 101 or 102 at corresponding limiting component 15.
Wherein, the limiting component 15 can be by being welded and fixed, connecting and fixing, be spirally connected with 11 inner wall of completion casing
It is fixed.
Specifically connect and fix are as follows: it is provided with connector on the limiting component 15, it is right between adjacent transformation layer
Connector holding tank is provided on the inner wall at the completion casing 11 answered.Connector on the limiting component 15 is connected to
In the holding tank on inner wall between adjacent transformation layer at the corresponding completion casing 11.
Specifically be spirally connected fixation are as follows: it is provided with bolt on the limiting component 15, it is corresponding between adjacent transformation layer
The completion casing 11 at inner wall on be provided with screw hole.Bolt on the limiting component 15 is screwed onto and adjacent transformation layer
Between in screw hole on inner wall at the corresponding completion casing 11.
The section of the ball seat 13 is rounded, and the area of section from one end of the ball seat 13 to the other end gradually increases
Greatly, wherein the small one end of area of section and the limiting component 15 compress, the big one end of area of section be provided with arc groove with
The dissolution ball 14 is accommodated, as shown in Figure 1 b.In addition, the material of the ball seat 13 can be with the material one of the dissolution ball 14
Cause, after waiting layer to be rebuilt all be transformed, ball seat 13 with dissolve ball 14 and restore gradually to dissolve with the water temperature in pit shaft, residue is with returning
Ground is returned out in drain.
Fig. 2 is the perforation pipe string structure schematic diagram that ball seat of the present invention insulates more cluster perforating and fracturing tubing string embodiments.Such as Fig. 2 institute
Show, perforation pipe string 12 is by cable 121, torpedo 122, head harness 123, magnetic locator 124, weighted lever 125, perforating gun 126, ball seat
Hole enlargement tool 127, ball seat deliver tool 128 and are sequentially connected composition.
Wherein, the ball seat hole enlargement tool 127 is connect with the ball seat 13, expanding for controlling the ball seat 13；
Ball seat is delivered tool 128 and is connect with the ball seat 13, is shipped to completion casing 11 for the ball seat 13 after will be expanding
Interior designated position, the designated position control magnetic locator 124 by terrestrial contr 16 to determine；
Terrestrial contr 16 controls 126 pairs of transformation layers of perforating gun and carries out single cluster perforating job or more cluster perforating jobs.
The ball seat of the present embodiment insulates more cluster perforating and fracturing tubing strings, by completion casing inner wall adjacent transformation layer it
Between be respectively arranged with limiting component at corresponding position；Perforation pipe string and ball seat waterpower have been pumped to using ground waterpower pump group
Before limiting component in casing between adjacent transformation layer；The ball seat hole enlargement tool of perforation pipe string is controlled by terrestrial contr
Current ball seat is expanding, then control again perforation pipe string ball seat deliver tool will it is current it is expanding after ball seat launch and be detached from；
Perforation pipe string is proposed from the completion casing in pit shaft by terrestrial contr；Ball will be dissolved using ground hydraulic pump to pump
Onto the ball seat after expanding, then by dissolve ball with it is expanding after ball seat together be pumped into limiting component between adjacent transformation layer
On, sealing layer is formed, layer will currently be transformed and insulate.Wherein, the material of ball seat can be consistent with the dissolution material of ball, and waiting changes
Make layer all be transformed after, ball seat with dissolve ball in pit shaft water temperature restore gradually dissolve, residue returns out ground with drain is returned,
Downhole well fluid Path Setup.It does not need to be removed plugged zone upper ball base and dissolution round bur with drill bit, has prevented bit freezing, bit breakage
The case where casing.In addition, also saving construction time and operating expenses.
Fig. 3 is the flow chart for the construction method embodiment that ball seat of the present invention insulates more cluster perforating and fracturing tubing strings, such as Fig. 3 institute
Show, ball seat of this method suitable for above-described embodiment insulates more cluster perforating and fracturing tubing strings, includes the following steps:
Step 301, by completion casing tripping in pit shaft, and reinforce the pit shaft, there is g sections of transformation layers in the pit shaft,
In, g is natural number.
For example, by completion casing tripping in pit shaft, and reinforce pit shaft.Wherein, the transformation layer in the pit shaft for needing to be transformed is 3
Layer.
Step 302, the cleaning pit shaft.
Step 303 carries out fracturing work to n-th section of transformation layer, wherein n is less than or equal to g, and n is natural number.
Fracturing work is carried out to paragraph 1 transformation layer.Wherein, fracturing work can spray for the operation of light casing fracturing or waterpower
Penetrate fracturing work.
Perforation pipe string and ball seat waterpower are pumped in completion casing described n-th section using ground waterpower pump group by step 304
Before the limiting component between layer and (n+1)th section of transformation layer is transformed.
Perforation pipe string and ball seat waterpower are pumped to paragraph 1 in completion casing using pump group in the surface water, layer and the 2nd is transformed
Before limiting component between section transformation layer.Wherein, perforation pipe string is by cable, torpedo, head harness, magnetic locator, weighted lever, perforation
Rifle, ball seat hole enlargement tool, ball seat deliver tool and are sequentially connected composition.
Ball seat hole enlargement tool is connect with ball seat, expanding for controlling the ball seat；Ball seat is delivered tool and is also connect with ball seat,
It is shipped to the designated position in completion casing for the ball seat after will be expanding, which is determined by magnetic locator.
Step 305, the perforation pipe string control that the ball seat is expanding, and launch it is expanding after ball seat.
The ball seat hole enlargement tool for controlling perforation pipe string by terrestrial contr is expanding by current ball seat, it is made to become larger.
Then control again perforation pipe string ball seat deliver tool will it is current it is expanding after ball seat launch and be detached from.
Step 306 carries out perforation to (n+1)th section of transformation layer using the perforation pipe string.
Single cluster perforation or more clusters are carried out to the 2nd section of transformation layer by the perforating gun that terrestrial contr controls perforation pipe string
Perforation.
The perforation pipe string is proposed the pit shaft by step 307.
Perforation pipe string is proposed from the completion casing in pit shaft by terrestrial contr.
Step 308, using the ground hydraulic pump by dissolve ball be pumped to it is described it is expanding after ball seat on, then ball will be dissolved
With it is described it is expanding after ball seat together be pumped to it is described n-th section transformation layer and (n+1)th section transformation layer between the limiting component
On, sealing layer is formed, n-th section of transformation layer is insulated.
Using ground hydraulic pump by dissolve ball be pumped into it is expanding after ball seat on, then by dissolve ball and it is expanding after ball seat one
With on the limiting component being pumped between paragraph 1 transformation layer and the 2nd section of transformation layer, sealing layer is formed, thus paragraph 1 is transformed
Layer insulates.
Step 309 repeats the operation of step 303 to step 308, until the g sections of transformations layer whole fracturing work is completed.
Fracturing work is carried out to the 2nd section of transformation layer；Perforation pipe string and ball seat waterpower are pumped to using pump group in the surface water
Before limiting component in completion casing between the 2nd section of transformation layer and the 3rd section of transformation layer；Perforation pipe is controlled by terrestrial contr
The ball seat hole enlargement tool of string is expanding by current ball seat, it is made to become larger；The perforation of perforation pipe string is controlled by terrestrial contr
Rifle carries out perforation to the 3rd section of transformation layer；Perforation pipe string is proposed from the completion casing in pit shaft by terrestrial contr；Benefit
With ground hydraulic pump by dissolve ball be pumped into it is expanding after ball seat on, then by dissolve ball with it is expanding after ball seat together be pumped into the
On limiting component between 2 sections of transformation layers and the 3rd section of transformation layer, sealing layer is formed, thus insulates the 2nd section of transformation layer；
Fracturing work is carried out to the 3rd section of transformation layer.Thus 3 layers of layer whole fracturing work to be rebuilt in pit shaft are finished.
After construction, whole dissolution balls and ball seat in pit shaft are gradually dissolved with water temperature recovery in well, dissolved
Residue returns discharge ground through open flow, and latus rectum is consistent in completion tubular column, and pit shaft is completely convenient for later period operation.
The ball seat of the present embodiment insulates the construction method of more cluster perforating and fracturing tubing strings, by completion casing inner wall in phase
A limiting component is respectively arranged at corresponding position between neighbour's transformation layer；Using ground waterpower pump group by perforation pipe string and ball
Before seat waterpower is pumped to the limiting component in completion casing between adjacent transformation layer；Perforation pipe string is controlled by terrestrial contr
Ball seat hole enlargement tool current ball seat is expanding, then control again perforation pipe string ball seat deliver tool will it is current it is expanding after
Ball seat, which is launched, to be detached from；Perforation is carried out to next transformation layer using perforation pipe string；By terrestrial contr by perforation pipe string from well
It is proposed in completion casing in cylinder；Using ground hydraulic pump by dissolve ball be pumped into it is expanding after ball seat on, then will dissolution ball with
Ball seat after expanding is pumped into together on the limiting component between adjacent transformation layer, forms sealing layer, layer packing will currently be transformed
Firmly.Wherein, the material of ball seat can be consistent with the dissolution material of ball, after waiting layer to be rebuilt to be all transformed, ball seat and dissolution ball
It is gradually dissolved with the water temperature recovery in pit shaft, residue returns out ground, downhole well fluid Path Setup with drain is returned.It does not need with brill
The case where plugged zone upper ball base is removed with dissolution round bur, has prevented bit freezing, bit breakage casing by head.In addition, also saving construction
Time and operating expenses.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (12)
1. a kind of ball seat insulates more cluster perforating and fracturing tubing strings characterized by comprising completion casing, perforation pipe string, ball seat and molten
Solve ball；
Limiting component is provided at corresponding position between adjacent transformation layer on the completion casing inner wall；
The perforation pipe string, the ball seat and the dissolution ball are respectively positioned in the completion casing；
The perforation pipe string is connect with the ball seat, for controlling and delivering the ball seat；
The ball seat is for accommodating the dissolution ball, and the ball seat compresses the limiting component to be fixed on the completion casing
The interior plugged zone formed between the adjacent transformation layer, wherein the dissolution ball is met after water reaches preset time and just be can dissolve；
Further, the limiting component is fixed on the inner wall of the completion casing by being welded and fixed, connecting and fixing or being spirally connected.
2. ball seat according to claim 1 insulates more cluster perforating and fracturing tubing strings, which is characterized in that including 2 limits
Component, 2 limiting components are with the setting substantially symmetrical about its central axis of the completion casing.
3. ball seat according to claim 2 insulates more cluster perforating and fracturing tubing strings, which is characterized in that the section of the ball seat is in
Circle, and the area of section from one end of the ball seat to the other end is gradually increased, wherein the small one end of area of section with it is described
Limiting component compresses, and the big one end of area of section is provided with arc groove to accommodate the dissolution ball.
4. ball seat according to claim 1 insulates more cluster perforating and fracturing tubing strings, which is characterized in that the perforation pipe string is by electricity
Cable, torpedo, head harness, magnetic locator, weighted lever, perforating gun, ball seat hole enlargement tool, ball seat deliver tool and are sequentially connected composition.
5. ball seat according to claim 4 insulates more cluster perforating and fracturing tubing strings, which is characterized in that the perforating gun is more clusters
Perforating gun.
6. ball seat according to claim 4 insulates more cluster perforating and fracturing tubing strings, which is characterized in that the ball seat delivers tool
It is connect with the ball seat, for delivering the ball seat.
7. ball seat according to claim 4 insulates more cluster perforating and fracturing tubing strings, which is characterized in that the ball seat hole enlargement tool
It is connect with the ball seat, it is expanding for controlling the ball seat.
8. -7 any ball seats insulate more cluster perforating and fracturing tubing strings according to claim 1, which is characterized in that the limiting section
It is provided with connector on part, is provided on the inner wall between the adjacent transformation layer at the corresponding completion casing described
The holding tank of connector；
The connector is connected in the holding tank.
9. -7 any ball seats insulate more cluster perforating and fracturing tubing strings according to claim 1, which is characterized in that the limiting section
It is provided with bolt on part, is provided with screw hole on the inner wall between the adjacent transformation layer at the corresponding completion casing；
The bolt is screwed onto the screw hole.
10. a kind of ball seat insulates the construction method of more cluster perforating and fracturing tubing strings, it is suitable for the ball seat as described in claim 1-9 is any
Insulate more cluster perforating and fracturing tubing strings characterized by comprising
By in completion casing tripping in pit shaft, and the pit shaft is reinforced, there are g sections of transformation layers in the pit shaft, wherein g is natural number；
Clean the pit shaft；
Fracturing work is carried out to n-th section of transformation layer, wherein n is less than or equal to g, and n is natural number；
Using ground waterpower pump group by perforation pipe string and ball seat waterpower be pumped in completion casing n-th section of transformation layer and n-th+
Before limiting component between 1 section of transformation layer；
The perforation pipe string controls that the ball seat is expanding, and launch it is expanding after ball seat；
Perforation is carried out to (n+1)th section of transformation layer using the perforation pipe string；
The perforation pipe string is proposed into the pit shaft；
Using the ground hydraulic pump by dissolve ball be pumped to it is described it is expanding after ball seat on, then will dissolution ball and it is described it is expanding after
Ball seat be pumped to together it is described n-th section transformation layer and (n+1)th section transformation layer between the limiting component on, formed packing
Layer insulates n-th section of transformation layer；
Above-mentioned operation is repeated, until the g sections of transformation layer whole fracturing work is completed.
11. according to the method described in claim 10, it is characterized in that, the fracturing work is the operation of light casing fracturing or waterpower
Spray fracturing work.
12. according to the method described in claim 10, it is characterized in that, the perforation is more shower holes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510090783.1A CN105986799B (en) | 2015-02-28 | 2015-02-28 | Ball seat packing multi-cluster perforation fracturing string and construction method |
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| CN201510090783.1A CN105986799B (en) | 2015-02-28 | 2015-02-28 | Ball seat packing multi-cluster perforation fracturing string and construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106593387B (en) * | 2016-12-21 | 2019-11-08 | 中国石油天然气股份有限公司 | Method for realizing staged multi-cluster fracturing of horizontal well |
| CN106761642B (en) * | 2016-12-21 | 2019-08-02 | 中国石油天然气股份有限公司 | Vertical well fixed-point multistage fracturing method and application |
| CN106917610A (en) * | 2017-05-11 | 2017-07-04 | 中国石油集团川庆钻探工程有限公司 | Multi-cluster sand blasting perforation sand-filling pipe column and sand-filling temporary plugging staged fracturing method |
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