CN203499632U - Small casing pipe suspending repair process tubular column of casing damage horizontal well - Google Patents
Small casing pipe suspending repair process tubular column of casing damage horizontal well Download PDFInfo
- Publication number
- CN203499632U CN203499632U CN201320651751.0U CN201320651751U CN203499632U CN 203499632 U CN203499632 U CN 203499632U CN 201320651751 U CN201320651751 U CN 201320651751U CN 203499632 U CN203499632 U CN 203499632U
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- small casing
- horizontal well
- small
- threaded
- hangs
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- 230000008439 repair process Effects 0.000 title abstract description 7
- 239000000725 suspension Substances 0.000 claims abstract description 9
- 238000005553 drilling Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 238000009418 renovation Methods 0.000 claims description 9
- 208000034656 Contusions Diseases 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000011084 recovery Methods 0.000 abstract description 3
- 238000003825 pressing Methods 0.000 abstract 2
- 238000010276 construction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 241000406668 Loxodonta cyclotis Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model provides a small casing pipe suspending repair process tubular column of a casing damage horizontal well and relates to a casing pipe suspending device for oil field well repair. The small casing pipe suspending repair process tubular column comprises a small drill rod rubber plug, a feeding drill rod, a right-and-left threaded suspension reversing connector, a hollow rubber plug assembly, a small casing pipe string, spiral rigid centralizers, a colliding-pressing connector, a float shoe, a float collar and an eddy flow pipe, wherein the feeding drill rod, the right-and-left threaded suspension reversing connector, the hollow rubber plug assembly, the small casing pipe string, the colliding-pressing connector, the float collar, the float shoe and the eddy flow pipe are sequentially connected in a threaded mode, the small casing pipe string is formed by connecting a plurality of small casing pipes in a threaded mode, and the spiral rigid centralizers are connected among the small casing pipes in a threaded mode. The problem that the horizontal well cannot perform normal production due to casing damage is solved, and a reliable technical means is provided for normal production recovery of the potential and diggable horizontal well. The small casing pipe suspending repair process tubular column ensures that the small casing pipe string can smoothly descend to the designed position (well depth) and secondary well cementation can be smoothly constructed.
Description
Technical field
The utility model relates to the casing suspension device that a kind of oil well is used, and is specially a kind of cover and damages horizontal well suspension small casing renovation technique tubing string.
Background technology
Horizontal wells technology is the effective way that improves oil recovery factor, accelerates recovery of the capital, reduces costs.Horizontal well is used for oil field old adjustment, taps the latent power and the whole Efficient Development in new district, and in the whole nation, each elephant is used widely, and has obtained significant economic benefit.But in oil field development manufacturing process, because a variety of causes horizontal well casing pipe can produce distortion, corrosion failure, bad break etc., damage phenomenon, horizontal well cannot normally be produced.Self structure feature due to horizontal well, conventional casing damaged well hangs small casing repair process cannot meet horizontal wells requirement, cover damage when repairing horizontal well technique, operation means are carried out research of technique and seemed very necessary, guarantee that cover damages horizontal well suspension small casing repairing construction and carries out smoothly, for horizontal well drops into oil field small complex faulted block reservoirs Efficient Development, provide technical support.
Utility model content
The purpose of this utility model is to provide a kind of cover and damages horizontal well suspension small casing renovation technique tubing string; it can guarantee that small casing string can be lower to design attitude (well depth) smoothly; can guarantee again secondary well cementation energy smooth construction; guarantee that annular clearance is substantially even; guarantee that electrical measurement cementing quality is good, meet production requirement.
The technical scheme that realizes above-mentioned purpose is: a kind of cover damages horizontal well and hangs small casing renovation technique tubing string, it is characterized in that: comprise the little plug of drilling rod, send into drilling rod, positive left-hand thread hangs back-off joint, hollow rubber plug assembly, the some small casings that are threaded successively, spiral rigid centralizer, bruising joint, float shoe, float collar and cyclone pipe, the described drilling rod of sending into, positive left-hand thread hangs back-off joint, hollow rubber plug assembly, the some small casings that are threaded, bruising joint, float collar, float shoe and cyclone pipe are threaded successively, spiral rigid centralizer has been threaded between small casing, described positive left-hand thread hangs back-off joint and comprises top connection and lower contact, top connection and lower contact are hollow cylinder, between top connection and lower contact, be threaded, described in to send into the thread rotary orientation that drilling rod is threaded with top connection contrary with the thread rotary orientation that top connection is threaded with lower contact.
Optimally, to hang the upper port of the top connection of back-off joint be suitable for reading large lower young tubaeform to described positive left-hand thread.
Optimally, 2-3, interval small casing is provided with a spiral rigid centralizer.
Optimally, described spiral rigid centralizer is hollow cylinder, and the middle part external diameter of spiral rigid centralizer is greater than the external diameter at two ends, and the middle part periphery of spiral rigid centralizer is evenly equipped with groove, and the groove at the middle part of spiral rigid centralizer is obliquely installed.
Operating principle:
In lower pipe string process, be in the milk 3～5 times, object is protection float shoe, float collar.Arriving design well depth under tail pipe, after turn on pump circulation well cleanup finishes, use conventional method cementing, press the little plug of drilling rod for slurry operation.During for mud, 1 m before little plug arrives hollow plug assembly position
3left and right, should reduce discharge capacity, notes the variation of Pump pressure meter.If observed after pump pressure obviously rises and got back to again normal value, illustrate that big or small plug is compound, now should check for slurry amount.When remaining 1.5 m for slurry amount
3during left and right, reduce discharge capacity, until bruising, whole well cementing operation finishes.Then connect kelly bar, transfer tail pipe string, the seat shaft bottom that builds the pressure presses down back-off.Positive left-hand thread suspension back-off joint above submits into drilling tool 5～8m after opening, and superfluous water mud is gone out in turn on pump circulation.Pull out of hole, wait solidifying.
The beneficial effects of the utility model: the utility model has solved horizontal well because cover damages the difficult problem that cannot normally produce, provides reliable technological means for the horizontal well having the potential to be tapped returns to normal production; It should guarantee that small casing string can be lower to design attitude (well depth) smoothly, guarantees again secondary well cementation energy smooth construction, guarantees that annular clearance is substantially even, guarantees that electrical measurement cementing quality is good, meets production requirement.Cover damages horizontal well and hangs small casing repair process and provide more technological means for field produces measure.
2-3, the utility model interval small casing is installed a spiral rigid centralizer; Make small casing at horizontal segment all the time in middle position, guarantee cementing quality, the middle part periphery of spiral rigid centralizer is evenly equipped with the groove being obliquely installed simultaneously, make to leave medium circulation gap between spiral rigid centralizer and old sleeve pipe, described groove is obliquely installed, and reduces contact area between spiral rigid centralizer and old sleeve pipe.
The upper port that positive left-hand thread of the present utility model hangs the top connection of back-off joint is suitable for reading large lower young tubaeform, is convenient to downhole tool in the future and passes through smoothly.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation that positive left-hand thread hangs back-off joint;
Fig. 3 is the structural representation of spiral rigid centralizer;
Fig. 4 is that A-A of Fig. 3 is to sectional view.
The specific embodiment
As shown in Fig. 1-4, the utility model comprises the little plug 1 of drilling rod, sends into drilling rod 2, positive left-hand thread hangs back-off joint 3, hollow rubber plug assembly 4, small casing string 5, spiral rigid centralizer 6, bruising joint 7, float shoe 9, float collar 8 and cyclone pipe 10, sending into drilling rod 2, positive left-hand thread suspension back-off joint 3, hollow rubber plug assembly 4, small casing string 5, bruising joint 7, float collar 8, float shoe 9 and cyclone pipe 10 is threaded successively, small casing string 5 is by being threaded and forming between some small casings, and 2-3, interval small casing is provided with a spiral rigid centralizer 6.
Positive left-hand thread hangs back-off joint 3 and comprises top connection 11 and lower contact 12, top connection 11 is hollow cylinder with lower contact 12, the upper port of top connection 11 is suitable for reading large lower young tubaeform, between top connection 11 and lower contact 12, be threaded, send into the thread rotary orientation that drilling rod 2 is threaded with top connection 11 contrary with the thread rotary orientation that lower contact 12 is threaded with top connection 11, spiral rigid centralizer 6 is hollow cylinder, the middle part external diameter of spiral rigid centralizer 6 is greater than the external diameter at two ends, the middle part periphery of spiral rigid centralizer 6 is evenly equipped with groove 13, the groove 13 at the middle part of spiral rigid centralizer 6 is obliquely installed.
Claims (5)
1. a cover damages horizontal well and hangs small casing renovation technique tubing string, it is characterized in that: comprise the little plug of drilling rod, send into drilling rod, positive left-hand thread hangs back-off joint, hollow rubber plug assembly, small casing string, spiral rigid centralizer, bruising joint, float shoe, float collar and cyclone pipe, described drilling rod, positive left-hand thread suspension back-off joint, hollow rubber plug assembly, small casing string, bruising joint, float collar, float shoe and the cyclone pipe sent into is threaded successively, described small casing string is by being threaded and forming between some small casings, and spiral rigid centralizer has been threaded between small casing; Described positive left-hand thread hangs back-off joint and comprises top connection and lower contact, top connection and lower contact are hollow cylinder, between top connection and lower contact, be threaded, described in to send into the thread rotary orientation that drilling rod is threaded with top connection contrary with the thread rotary orientation that top connection is threaded with lower contact.
2. a kind of cover according to claim 1 damages horizontal well and hangs small casing renovation technique tubing string, it is characterized in that: the upper port that described positive left-hand thread hangs the top connection of back-off joint is suitable for reading large lower young tubaeform.
3. a kind of cover according to claim 1 damages horizontal well and hangs small casing renovation technique tubing string, it is characterized in that: 2-3, interval small casing is provided with a spiral rigid centralizer.
4. a kind of cover according to claim 1 damages horizontal well and hangs small casing renovation technique tubing string, it is characterized in that: described spiral rigid centralizer is hollow cylinder, the middle part external diameter of spiral rigid centralizer is greater than the external diameter at two ends, and the middle part periphery of spiral rigid centralizer is evenly equipped with groove.
5. a kind of cover according to claim 4 damages horizontal well and hangs small casing renovation technique tubing string, it is characterized in that: the groove at the middle part of spiral rigid centralizer is obliquely installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320651751.0U CN203499632U (en) | 2013-10-22 | 2013-10-22 | Small casing pipe suspending repair process tubular column of casing damage horizontal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320651751.0U CN203499632U (en) | 2013-10-22 | 2013-10-22 | Small casing pipe suspending repair process tubular column of casing damage horizontal well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203499632U true CN203499632U (en) | 2014-03-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320651751.0U Expired - Lifetime CN203499632U (en) | 2013-10-22 | 2013-10-22 | Small casing pipe suspending repair process tubular column of casing damage horizontal well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203499632U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105986776A (en) * | 2015-02-05 | 2016-10-05 | 中国石油天然气股份有限公司 | Repairing method for damaged casing pipe of oil-water well |
| CN106761515A (en) * | 2017-02-19 | 2017-05-31 | 胜利油田胜兴集团有限责任公司 | A kind of superficial part set leakage external reinforcement repaiies set technique |
| CN111794723A (en) * | 2020-07-20 | 2020-10-20 | 中国石油化工股份有限公司 | Side drilling small casing well cementation method |
| CN114837605A (en) * | 2022-05-31 | 2022-08-02 | 中国石油化工股份有限公司 | Oil increasing method for casing damage well free of hole repairing suspension |
-
2013
- 2013-10-22 CN CN201320651751.0U patent/CN203499632U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105986776A (en) * | 2015-02-05 | 2016-10-05 | 中国石油天然气股份有限公司 | Repairing method for damaged casing pipe of oil-water well |
| CN105986776B (en) * | 2015-02-05 | 2019-02-15 | 中国石油天然气股份有限公司 | A kind of restorative procedure of Casing Failure breakage |
| CN106761515A (en) * | 2017-02-19 | 2017-05-31 | 胜利油田胜兴集团有限责任公司 | A kind of superficial part set leakage external reinforcement repaiies set technique |
| CN106761515B (en) * | 2017-02-19 | 2021-06-29 | 胜利油田胜兴集团有限责任公司 | Shallow sleeve leakage reinforcing and repairing process |
| CN111794723A (en) * | 2020-07-20 | 2020-10-20 | 中国石油化工股份有限公司 | Side drilling small casing well cementation method |
| CN111794723B (en) * | 2020-07-20 | 2022-12-02 | 中国石油化工股份有限公司 | Side drilling small casing well cementation method |
| CN114837605A (en) * | 2022-05-31 | 2022-08-02 | 中国石油化工股份有限公司 | Oil increasing method for casing damage well free of hole repairing suspension |
| CN114837605B (en) * | 2022-05-31 | 2024-05-03 | 中国石油化工股份有限公司 | Oil increasing method for casing damage well hole-repairing-free suspension |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140326 |
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| CX01 | Expiry of patent term |