CN107724995A - A kind of mechanical-set half dissolving bridging device and its fracturing process - Google Patents
A kind of mechanical-set half dissolving bridging device and its fracturing process Download PDFInfo
- Publication number
- CN107724995A CN107724995A CN201711218995.9A CN201711218995A CN107724995A CN 107724995 A CN107724995 A CN 107724995A CN 201711218995 A CN201711218995 A CN 201711218995A CN 107724995 A CN107724995 A CN 107724995A
- Authority
- CN
- China
- Prior art keywords
- ring
- central tube
- dissolving
- packing element
- pressure break
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/134—Bridging plugs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
Abstract
A kind of mechanical-set half dissolving bridging device and its fracturing process,Including insoluble center tube section and soluble outer section,Mechanical-set half dissolving bridging device can individually go into the well,Tubing string string can also be formed to go into the well,When can mechanical-set half dissolving bridging plug is chivalrous steal precalculated position when,First upper body tubing string,Then decentralization rotation tubing string,After half dissolving bridging plug is set completely,Carry out sand fracturing,After the completion for the treatment of pressure break,Instill lytic agent,Dissolve bridging plug outer layer,Only retain center tube section,Central tube is identical with the inside/outside diameter size of oil pipe,After the completion of operation,Directly using central tube when oil pipe is recovered the oil (gas),The present invention breaches the limitation of the special setting tool of the necessary tripping in of existing solvable bridging plug,One-trip string completes setting fracture,The outer layer of bridging plug is dissolved after the completion of pressure break,Bridging plug central tube is directly when oil pipe is recovered the oil (gas).
Description
Technical field
The present invention relates to oil-gas field development technical field, and in particular to a kind of mechanical-set half dissolving bridging device and its
Fracturing process.
Background technology
Pressure break is link important in oilfield exploitation procedure, and conventional oil gas field development fracturing tubing string mainly has machinery at present
Staged fracturing, the mode such as hydraulic jetting fracturing and pumping bridging plug pressure break.Wherein pumping bridging plug is mainly used in unconventionaloil pool
Field is developed, such as fine and close rammell oil-gas mining.It is mainly fast brill composite bridge plug that early stage, which pumps bridging plug, and its technical process is first by again
Close bridging plug and be pumped to target zone lower end, treat to bore milling composite bridge plug after the completion of pressure break.This mode needs tripping in once to bore milling tubing string,
And need the row of returning to stay in the chip in shaft bottom, and some big chips often return and can not arrange well head during the row's of returning chip, cause these
Chip is retained in shaft bottom.A kind of dissolvable bridge plug is developed in order to solve the problems, such as this respect, lytic agent is instilled after the completion of pressure break
Bridging plug is dissolved.This bridging plug, which eliminates, bores the process such as milling bridging plug, the row's of returning chip, and cost of labor greatly reduces, reduces
Chip is to risk caused by pit shaft.However, be to bore composite bridge plug soon, or solvable bridging plug all send bridging plug first with cable
Enter target zone, then tripping in oil-gas mining tubing string again, still cause the increase of cost of labor.
The content of the invention
In view of the shortcomings of the prior art, it is an object of the invention to provide a kind of mechanical-set half dissolving bridging device and
Its fracturing process, the processes such as pressure break oil recovery (gas) can be completed by completing one-trip string using mechanical-set half dissolving bridging plug.
To reach above-mentioned purpose, the technical scheme taken of the invention is：
A kind of mechanical-set half dissolving bridging device, including insoluble central tube 1, cover successively on central tube 1
Be connected to it is soluble set ring 3, set outer barrel 4, slips 5, cone 6, shelves ring 7, side packing element 9, middle packing element 10, inner sleeve 11, support
Ring 12, brake pad outer barrel 13；Between cone 6 and central tube 1, the inner side of shelves ring 7 is stuck on central tube 1 shelves ring 7, the outside of shelves ring 7
In embedded cone 6, set pin 8 and be fastened on by cone 6 on central tube 1, ball sealer 2 is centrally disposed in pipe.Set on central tube 1
Lug 14 is equipped with, the J-type groove of lug 14 and brake pad outer barrel 13 is slidably connected.
Described sets " C-shaped ring " of the ring 3 for a reducing, wherein it is one " up big and down small " to set the outside 3-1 of ring 3
Ring body is formed, and is set the conical surface that the inner side 3-2 of ring 3 is one " up big and down small " and is formed.
Material hardness selected by described middle packing element 10, side packing element 9, inner sleeve 11 and support ring 12 is increased successively.
A kind of mechanical-set half dissolves the fracturing process of bridging device, comprises the following steps：
1 oil pipe fastening means is gone into the well to design attitude
2 set half dissolving bridging plug；More than 1 meter of upper lifting pipe post, the lug of central tube 1 is above carried to location A.Turn clockwise
More than three weeks, the lug of central tube 1 is transferred to B location in rotation, pin 8 is set and cuts, rotation is set always afterwards, Zhi Daobian
Packing element 9, middle packing element 10 are set completely, and slips 5 opens completely；
3 pressure break target zones：Out of sleeve pipe plus sand, pressure break successively from top to bottom.
(4) the dissolving bridging plug outer layer of dissolving half：Set ring and will set state and fix so that packing element can not unseal.First lamination
After the completion of splitting, lytic agent is instilled, the outside of half dissolving bridging plug is dissolved, only retains the internal-and external diameter identical portion of internal layer and oil pipe
Point.
(5) interval of pressure break second：Repeat step (3), (4), until the complete all purposes interval of pressure break.
(6) pressure break is completed to carry out open flow pumping process, and carries out gas production.
The present invention can individually go into the well, and can also form tubing string string and go into the well.When can precalculated position of the present invention when, first upper lifting pipe
Post, then decentralization rotation tubing string, after the present invention is set completely, carries out sand fracturing.After the completion for the treatment of pressure break, lytic agent is instilled,
Bridging plug outer layer is dissolved, only retains center tube section.Central tube is identical with the inside/outside diameter size of oil pipe.After the completion of operation, directly
Using central tube when oil pipe is recovered the oil (gas).The link of oil pipe when the present invention can remove traditional solvable bridging plug gas production from, is saved
Production cost.The present invention's sets mode and can effectively avoid setting phenomena such as not exclusively causing to be unable to normal construction.
Brief description of the drawings
Fig. 1 is present apparatus overall structure diagram.
Fig. 2 is friction outer barrel J-type groove schematic diagram.
Fig. 3 is to set ring schematic diagram；Wherein Fig. 3 A are side view, and Fig. 3 B are front view.
Fig. 4 is inner sleeve and support ring combination diagram.
Fig. 5 is schematic diagram after the dissolving of present apparatus soluble fraction.
Fig. 6 is that the fracturing string of present apparatus composition is gone into the well original state schematic diagram.
Fig. 7 is schematic diagram after first bridging plug of fracturing string of present apparatus composition dissolves.
Fig. 8 is schematic diagram after second bridging plug of fracturing string of present apparatus composition dissolves.
Fig. 9 is that bridging plug is dissolved in present apparatus bottom half and negative pressure drags for sand tool combinations connection diagram.
In figure：1st, central tube, 2, ball sealer, 3, set ring, 4, set outer barrel, 5, slips, 6, cone, 7, shelves ring, 8, sit
Offset, 9, side packing element, 10, middle packing element, 11, inner sleeve, 12, support ring, 13, brake pad outer barrel, 14, lug.
Embodiment
The present invention is discussed in detail below in conjunction with the accompanying drawings.
Reference picture 1, a kind of mechanical-set half dissolving bridging device, including insoluble central tube 1, reference picture 5,
It is socketed with successively on central tube 1 and soluble set ring 3, sets outer barrel 4, slips 5, cone 6, shelves ring 7, side packing element 9, middle packing element
10th, inner sleeve 11, support ring 12, brake pad outer barrel 13；For shelves ring 7 between cone 6 and central tube 1, the inner side of shelves ring 7 is stuck in central tube
On 1, in the embedded cone 6 in the outside of shelves ring 7, set pin 8 and be fastened on by cone 6 on central tube 1, ball sealer 2 is centrally disposed pipe
It is interior.Reference picture 2, lug 14 is provided with central tube 1, the J-type groove of lug 14 and brake pad outer barrel 13 is slidably connected.
Reference picture 3A, Fig. 3 B, described sets " C-shaped ring " of the ring 3 for a reducing, wherein setting the outside 3-1 of ring 3 as one
The ring body of individual " up big and down small " is formed, and is set the conical surface that the inner side 3-2 of ring 3 is one " up big and down small " and is formed.When the present invention is set
When, set ring 3 and gradually open；When setting completion, it can just be embedded in and set in outer barrel 4.
Reference picture 4, the material hardness selected by described middle packing element 10, side packing element 9, inner sleeve 11 and support ring 12 are to increase successively
Add, can so be effectively protected auxiliary seal side packing element and not be torn.
Reference picture 6- Fig. 9, the operation principle of the present apparatus are：Using tubing spinning so that the lug 16 of central tube 1 is rubbing
Slided in block outer barrel 13J type grooves so that brake pad outer barrel 13 promotes cone 6 to move, and after cutting sets pin 8, promotes slips 5 to open
Open so that middle packing element 10 is close to and in pit shaft, side packing element 9, support ring 12, inner sleeve 11 mainly play auxiliary seal completely；When
Set complete recoil seal ring 3 and setting opening in outer barrel 4, be stuck on central tube 1.Support ring 12 collectively constitutes traffic with inner sleeve 11
Protrusion-dispelling combines, and conventional packing element packing element when setting often causes packing element to lose envelope in the active force tear of decentralization, and packing element loses envelope meeting
Influence the effect of whole pressure break.And the compound action of support ring 12 and inner sleeve 11 be protection packing element avoid tearing, packing element, inner sleeve,
Material hardness selected by support ring is increased successively, can so be effectively protected packing element and not be torn.
A kind of mechanical-set half dissolves the fracturing process of bridging device, reference picture 6- Fig. 9, comprises the following steps：
1 oil pipe fastening means is gone into the well to design attitude；
2 set half dissolving bridging plug；More than 1 meter of upper lifting pipe post, the lug of central tube 1 is above carried to location A, reference picture 2, it is suitable
Hour hands are rotated three circles the above, and the lug of central tube 1 is transferred to B location in rotation, pin 8 is set and cuts, rotation is sat always afterwards
Envelope, until side packing element 9, middle packing element 10 are set completely, slips 5 opens completely；
(3) pressure break target zone：Out of sleeve pipe plus sand, pressure break successively from top to bottom.
(4) the dissolving bridging plug outer layer of dissolving half：Set ring and will set state and fix so that packing element can not unseal.First lamination
After the completion of splitting, lytic agent is instilled, the outside of half dissolving bridging plug is dissolved, only retains the internal-and external diameter identical portion of internal layer and oil pipe
Point.
(5) interval of pressure break second：Repeat step (3), (4), until the complete all purposes interval of pressure break.
(6) pressure break is completed to carry out open flow pumping process, and carries out gas production.
Claims (4)
1. a kind of mechanical-set half dissolving bridging device, it is characterised in that including insoluble central tube (1), at center
It is socketed with successively on pipe (1) and soluble set ring (3), sets outer barrel (4), slips (5), cone (6), shelves ring (7), side packing element
(9), middle packing element (10), inner sleeve (11), support ring (12), brake pad outer barrel (13)；Shelves ring (7) is in cone (6) and central tube (1)
Between, it is stuck on the inside of shelves ring (7) on central tube (1), on the outside of shelves ring (7) in embedded cone (6), sets pin (8) and pass through cone (6)
It is fastened on central tube (1), ball sealer (2) is centrally disposed in pipe；Lug (14), lug (14) are provided with central tube (1)
It is slidably connected with the J-type groove of brake pad outer barrel (13).
2. the mechanical-set half dissolving bridging device of one kind according to claim 1, it is characterised in that described sets ring
(3) it is " C-shaped ring " of a reducing, forms, set for the ring body of one " up big and down small " wherein setting on the outside of ring (3) (3-1)
(3-2) is that the conical surface of one " up big and down small " is formed on the inside of ring (3).
3. the mechanical-set half dissolving bridging device of one kind according to claim 1, it is characterised in that described middle packing element
(10), the material hardness selected by side packing element (9), inner sleeve (11) and support ring (12) is increased successively.
4. a kind of mechanical-set half dissolves the fracturing process of bridging device, comprise the following steps：
(1) oil pipe fastening means is gone into the well to design attitude；
(2) half dissolving bridging plug is set；More than 1 meter of upper lifting pipe post, the lug of central tube (1) is above carried to location A；Turn clockwise
More than three weeks, central tube (1) lug is transferred to B location in rotation, sets pin (8) cutting, rotation is set always afterwards, directly
Set completely to side packing element (9), middle packing element (10), slips (5) opens completely；
(3) pressure break target zone：Out of sleeve pipe plus sand, pressure break successively from top to bottom；
(4) the dissolving bridging plug outer layer of dissolving half：Set ring and will set state and fix so that packing element can not unseal；First layer pressure break is complete
Cheng Hou, lytic agent is instilled, the outside of half dissolving bridging plug is dissolved, only retains the internal-and external diameter identical part of internal layer and oil pipe；
(5) interval of pressure break second：Repeat step (3), (4), until the complete all purposes interval of pressure break；
(6) pressure break is completed to carry out open flow pumping process, and carries out gas production.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711218995.9A CN107724995A (en) | 2017-11-28 | 2017-11-28 | A kind of mechanical-set half dissolving bridging device and its fracturing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711218995.9A CN107724995A (en) | 2017-11-28 | 2017-11-28 | A kind of mechanical-set half dissolving bridging device and its fracturing process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107724995A true CN107724995A (en) | 2018-02-23 |
Family
ID=61218773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711218995.9A Pending CN107724995A (en) | 2017-11-28 | 2017-11-28 | A kind of mechanical-set half dissolving bridging device and its fracturing process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107724995A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513074A (en) * | 2019-08-16 | 2019-11-29 | 中国石油集团长城钻探工程有限公司 | Dissolvable bridge plug |
| CN111021977A (en) * | 2019-11-22 | 2020-04-17 | 中国石油天然气股份有限公司 | Method for quickly removing soluble bridge plug in case of blocking |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201420527Y (en) * | 2009-06-08 | 2010-03-10 | 阜新驰宇石油机械有限公司 | Staged fracturing bridge plug |
| CN203925413U (en) * | 2014-03-13 | 2014-11-05 | 吉林市旭峰激光科技有限责任公司 | A kind ofly exempt to bore formula bridging plug based on solvable slips |
| CN104612626A (en) * | 2015-02-11 | 2015-05-13 | 四机赛瓦石油钻采设备有限公司 | Bridge plug with large drift diameter |
| CN204492751U (en) * | 2015-02-16 | 2015-07-22 | 中国石油集团渤海钻探工程有限公司 | With the bridging plug instrument of solvable ball |
| US20150285026A1 (en) * | 2013-05-13 | 2015-10-08 | Magnum Oil Tools International, Ltd. | Dissolvable aluminum downhole plug |
| CN105064953A (en) * | 2015-07-20 | 2015-11-18 | 中国石油集团渤海钻探工程有限公司 | Rapidly degradable bridge plug with degradation-promoting central pipe |
| CN105672942A (en) * | 2016-02-02 | 2016-06-15 | 四机赛瓦石油钻采设备有限公司 | Degradable drilling-free bridge plug |
| CN106894787A (en) * | 2017-03-06 | 2017-06-27 | 四机赛瓦石油钻采设备有限公司 | A kind of single deck tape-recorder watt big orifice bridging plug and its set method |
-
2017
- 2017-11-28 CN CN201711218995.9A patent/CN107724995A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201420527Y (en) * | 2009-06-08 | 2010-03-10 | 阜新驰宇石油机械有限公司 | Staged fracturing bridge plug |
| US20150285026A1 (en) * | 2013-05-13 | 2015-10-08 | Magnum Oil Tools International, Ltd. | Dissolvable aluminum downhole plug |
| CN203925413U (en) * | 2014-03-13 | 2014-11-05 | 吉林市旭峰激光科技有限责任公司 | A kind ofly exempt to bore formula bridging plug based on solvable slips |
| CN104612626A (en) * | 2015-02-11 | 2015-05-13 | 四机赛瓦石油钻采设备有限公司 | Bridge plug with large drift diameter |
| CN204492751U (en) * | 2015-02-16 | 2015-07-22 | 中国石油集团渤海钻探工程有限公司 | With the bridging plug instrument of solvable ball |
| CN105064953A (en) * | 2015-07-20 | 2015-11-18 | 中国石油集团渤海钻探工程有限公司 | Rapidly degradable bridge plug with degradation-promoting central pipe |
| CN105672942A (en) * | 2016-02-02 | 2016-06-15 | 四机赛瓦石油钻采设备有限公司 | Degradable drilling-free bridge plug |
| CN106894787A (en) * | 2017-03-06 | 2017-06-27 | 四机赛瓦石油钻采设备有限公司 | A kind of single deck tape-recorder watt big orifice bridging plug and its set method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513074A (en) * | 2019-08-16 | 2019-11-29 | 中国石油集团长城钻探工程有限公司 | Dissolvable bridge plug |
| CN111021977A (en) * | 2019-11-22 | 2020-04-17 | 中国石油天然气股份有限公司 | Method for quickly removing soluble bridge plug in case of blocking |
| CN111021977B (en) * | 2019-11-22 | 2022-05-10 | 中国石油天然气股份有限公司 | Method for quickly removing soluble bridge plug in case of blocking |
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