CN203685152U - Oil-gas well fracture acidizing technique pipe - Google Patents
Oil-gas well fracture acidizing technique pipe Download PDFInfo
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- CN203685152U CN203685152U CN201420000944.4U CN201420000944U CN203685152U CN 203685152 U CN203685152 U CN 203685152U CN 201420000944 U CN201420000944 U CN 201420000944U CN 203685152 U CN203685152 U CN 203685152U
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- sliding sleeve
- lower contact
- tubing string
- oil
- gas well
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 230000007246 mechanism Effects 0.000 claims abstract description 12
- 230000020477 pH reduction Effects 0.000 claims description 9
- 238000010008 shearing Methods 0.000 claims description 7
- 230000011218 segmentation Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 description 4
- 239000010410 layer Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
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Abstract
The utility model discloses an oil-gas well fracture acidizing technique pipe which solves the problem that an existing technique pipe is difficult to be taken out from a well. The oil-gas well fracture acidizing technique pipe comprises a first-level layered sliding sleeve, a second-level layered until an N-level layered sliding sleeve, all the layered sliding sleeves are sequentially arrayed and respectively provided with a sling sleeve core, N is not smaller than 2, packers are arranged between adjacent two levels of the layered sliding sleeves, and the oil-gas well fracture acidizing technique pipe further comprises rated-load switches for segmenting the pipe, and each rated-load switch comprises an upper connector connected with the corresponding packer, a lower connector connected with the next-level layered sliding sleeve, and a limit mechanism for being connected with the upper connector. The limit mechanisms are detachably connected with the lower connectors. The oil-gas well fracture acidizing technique pipe is reasonable in structure, convenient to operate, high in efficiency, low in cost, and capable of being smoothly taken out from the well after construction, and time and labor are saved.
Description
Technical field
The utility model relates to a kind of Oil/gas Well down-hole process pipe string, specifically, relates to a kind of well fracturing acidification technique tubing string.
Background technology
Along with going deep into of oil field development, stratum becomes increasingly complex, and interlayer difference is large, and the quantity of pressure break, acidifying layering also increases gradually, and layering measure process pipe string also becomes and becomes increasingly complex.Due to the complexity of process pipe string, the taking-up meeting in tubing string later stage is along with sand buries or the impact of the factors such as packer permanent set and become more and more difficult, and especially, aspect high angle hole and horizontal well, this problem is more outstanding.
Conventional process pipe string adopts layering sliding sleeve to add the form of structure of packer, ball seat conventionally, this kind of mode is because the ball seat adopting is overall structure, can not be split, thereby function singleness, itself and the effect of only just having played construction in layer that coordinates of layering sliding sleeve do not play the effect that helps and promote in the taking-up process of later stage process pipe string.In the time that needs take out tubing string, need all subsidiary instrument in tubing string is all loosening, and then utilize sizable upper lifting force by disposable process pipe string taking-up, operational risk is high, difficulty is large.And, if tubing string is long, in taking-up process, also can easily there is blocked portion phenomenon, and while running into this situation, just need many-sided adjustment, first make tubing string and subsidiary instrument thereof all loosening, and then apply larger upper lifting force and take out tubing string, this not only takes time and effort, and takes out poor effect.Therefore, existing taking-up mode is difficult to make process pipe string to take out smoothly in well.
Utility model content
The purpose of this utility model is to provide a kind of well fracturing acidification technique tubing string, mainly solves existing process pipe string and in well, is difficult to the problem of taking out smoothly.
To achieve these goals, the technical solution adopted in the utility model is as follows:
A kind of well fracturing acidification technique tubing string, comprise the first order layering sliding sleeve, the substratification sliding sleeve that are arranged in order and are equipped with sliding sleeve fuse ... N stage layered sliding sleeve, wherein, N is not less than 2, and between two adjacent stage layered sliding sleeves, be equipped with packer, also comprise the volume load switch for making tubing string segmentation; Described volume load switch comprises the top connection being connected with upper level packer, the lower contact being connected with next stage layering sliding sleeve, and the position-limit mechanism being connected with top connection; Described position-limit mechanism and lower contact removably connect.
Specifically, described position-limit mechanism comprises the adapter sleeve being connected with top connection, outer wall is flexibly connected with this adapter sleeve and falls into central tube wherein for sliding sleeve fuse, and one end is connected in adapter sleeve, the other end and clamps under central tube outer wall supports the bullet pawl of lower contact; Described lower contact and adapter sleeve removably connect.
Further, described lower contact is connected with adapter sleeve by shear pin.
As preferably, the shearing force size of described shear pin is 5～50T.
Based on said structure, the utility model also provides the removing method of this well fracturing acidification technique tubing string, comprises the following steps:
(1) while construction, open upper level layering sliding sleeve, make sliding sleeve fuse wherein drop into central tube inside and move with the direction that next stage layering sliding sleeve is connected to lower contact, make to play pawl and lose central tube support and inwardly shrink and also tentatively unclamp lower contact;
(2) upper lifting pipe post, applies the upper lifting force that is not less than shear pin shearing force to top connection, break shear pin, plays pawl simultaneously and continues inwardly shrink and be totally released lower contact under top connection and adapter sleeve drive, and lower contact is separated with adapter sleeve;
(3) circulation step (1), (2) successively, until all layering sliding sleeves of process pipe string all take out.
Compared with prior art, the utlity model has following beneficial effect:
(1) the utility model reasonable in design, with low cost, easy to use.
(2) the utility model adopts the volume load switch of applicant's designed, designed to replace conventional ball seat, it not only can coordinate layering sliding sleeve to realize construction in layer, and utilize its detachable characteristic, the form that makes process pipe string can be divided into multistage is taken out one by one, thereby significantly reduce the taking-up difficulty of process pipe string, guarantee that process pipe string can take out smoothly in well, and taking-up mode of the present utility model is taken out tubing string after all subsidiary instrument in tubing string is all become flexible again, thereby operating procedure is very succinct, efficiency is quite high.
(3) the utility model adopts position-limit mechanism to realize the separation of adjacent two stage layered sliding sleeves, it utilizes shear pin to connect lower contact, and before having utilized dexterously sliding sleeve fuse to fall into, after structure and pressure change, realize and play the degree of tightness of pawl to lower contact, can be the same with ball seat in the time of clamping lower contact, guarantee carrying out smoothly of construction in layer, and in the time unclamping, can reduce the load forces that tubing string takes out, no matter the utility model is to lower contact clamping or unclamps, it all can ensure that compressive strength is constant, and the utility model can be selected according to construction condition the shear pin of relevant shear power, thereby on meeting to the full extent, propose the requirement of load, and process pipe string can be taken out smoothly in well.
(4) the utility model process pipe string in to well is applied with while carrying load, if whole process pipe string is more loosening, without blocked portion phenomenon, tubing string can disposable whole taking-ups, if carry after load in the maximum that uses well head to provide, there is not yet loosening sign in tubing string, can not disposable whole taking-ups, the lower contact in volume load switch and the part on it can be separated, after separately, in lower contact part tubing string relatively shorten, thereby take out possibility be also greatly improved, there is hardly any taking-up difficulty; After top tubing string takes out, again from being newly lowered to fishing tool, the tubing string part being connected with lower contact is taken out, repeat successively, until tubing string in well is all taken out, the utility model has solved the indeterminable problem of prior art, realize the irrealizable effect of prior art, therefore, it compared with prior art has substantial feature and progress.
(5) the utility model is practical, easily manufactured, aspect Oil/gas Well, is with a wide range of applications, and therefore, the utlity model has very high practical value and promotional value.
Brief description of the drawings
Fig. 1 is overall structure schematic diagram of the present utility model.
Fig. 2 is the structural representation of volume load switch.
Fig. 3 is that sliding sleeve fuse falls into the schematic diagram after volume load switch.
Fig. 4 is that volume load switch is isolated the structural representation after lower contact.
Wherein, the component name that Reference numeral is corresponding is called:
1-layering sliding sleeve, 2-sliding sleeve fuse, 3-packer, 4-volume load switch, 5-top connection, 6-central tube, 7-bullet pawl, 8-adapter sleeve, 9-lower contact, 10-shear pin.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in further detail, and embodiment of the present utility model includes but not limited to the following example.
Embodiment
As shown in Figure 1, 2, the utility model comprises the layering sliding sleeve 1, packer 3 and the volume load switch 4 that connect successively.Described layering sliding sleeve 1 is at least two, by the first order, the second level ... N level is arranged in order, and correspondingly, packer 3 and volume load switch 4 are also at least two, and the volume load switch 4 of upper level is connected with the layering sliding sleeve 1 of next stage, the like, all layering sliding sleeves link together by packer and volume load switch, form process pipe string.
Like the prior art, in described layering sliding sleeve 1, be provided with sliding sleeve fuse 2.Existing situation is that the sliding sleeve fuse 2 in layering sliding sleeve 1 can drop in ball seat through packer 3 in the time of construction, and the sliding sleeve fuse 2 in the utility model drops in volume load switch 4 through packer 3 in the time of construction.Volume load switch 4 is for disconnecting process pipe string, so that the taking-up of process pipe string, specifically, this volume load switch 4 comprises the top connection 5 being connected with packer 3, the lower contact 9 being connected with layering sliding sleeve 1, and be connected to the position-limit mechanism between top connection 5 and lower contact 9.Described position-limit mechanism falls into for the sliding sleeve fuse 2 of upper level layering sliding sleeve, and after falling into, sliding sleeve fuse 2 by top connection 5 being applied to upper lifting force, lower contact 9 is deviate from, thereby two stage layered sliding sleeves are departed from, and progressively take out, this position-limit mechanism comprises the adapter sleeve 8 being connected with top connection 5, outer wall is flexibly connected with this adapter sleeve 8 and falls into central tube 6 wherein for sliding sleeve fuse 2, and one end is connected in adapter sleeve 8, the other end and clamps under central tube outer wall supports the bullet pawl 7 of lower contact 9; Described lower contact 9 is connected by shear pin 10 with adapter sleeve 8.Lower contact 9 final outcomes separate except bullet pawl 7 unclamps it, also need to be decided by the shearing force of shear pin 10, and the upper lifting force that top connection 5 is applied need to be not less than the shearing force of shear pin 10, so can successfully separate lower contact 9.According to the physical condition of site operation, as preferably, in the present embodiment, the shearing force size of described shear pin 10 is 5～50T, and volume load switch 4 is the same with ball seat, and before sliding sleeve fuse 2 falls into, its size that connects power is not less than 40T.
Implementation procedure of the present utility model is as follows:
When construction, open first order layering sliding sleeve, sliding sleeve fuse 2 wherein can drop into shutoff central tube 6 inside in central tube 6, as shown in Figure 3, now, under sliding sleeve fuse 2 pressure-actings, central tube 6 can move with the direction that next stage layering sliding sleeve is connected to lower contact 9, thereby cause playing one end that pawl 7 clamps lower contact 9 and lose support, then reserve the space of inside contraction, and tentatively unclamp lower contact 9, now, rely on the connection of shear pin 10, lower contact 9 does not still depart from.Then, upper lifting pipe post, top connection 5 is applied to the upper lifting force that is not less than shear pin 10 shearing forces, make to play pawl 7 and continue inwardly to shrink and be totally released lower contact 9 under top connection 5 and adapter sleeve 8 drives, shear pin 10 is pulled off simultaneously, thereby cause lower contact 9 to depart from, then first order volume load switch top tubing string part is taken out, volume load switch 4 is isolated structure after lower contact 9 as shown in Figure 4.First order volume load switch top tubing string part is lowered to fishing tool after taking out, and then in the same way successively by substratification sliding sleeve, third level layering sliding sleeve ... N stage layered sliding sleeve takes out one by one.
Those skilled in the art, according to above-described embodiment and in conjunction with after prior art and common practise, can know the technical scheme that the utility model is complete beyond all doubtly.And what deserves to be explained is; above-described embodiment is only preferably a kind of implementation of the utility model; should be in order to not limit protection domain of the present utility model; in every case any change and polishing of having no essential meaning of having done under body design thought of the present utility model and spirit; or be equal to displacement; its technical problem solving is consistent with the utility model in fact, also should be in protection domain of the present utility model.
Claims (4)
1. a well fracturing acidification technique tubing string, comprise the first order layering sliding sleeve, the substratification sliding sleeve that are arranged in order and are equipped with sliding sleeve fuse (2) ... N stage layered sliding sleeve, wherein, N is not less than 2, and be equipped with packer (3) between two adjacent stage layered sliding sleeves, it is characterized in that, also comprise the volume load switch (4) for making tubing string segmentation; Described volume load switch (4) comprises the top connection (5) being connected with upper level packer, the lower contact (9) being connected with next stage layering sliding sleeve, and the position-limit mechanism being connected with top connection (5); Described position-limit mechanism and lower contact (9) removably connect.
2. a kind of well fracturing acidification technique tubing string according to claim 1, it is characterized in that, described position-limit mechanism comprises the adapter sleeve (8) being connected with top connection (5), outer wall is flexibly connected with this adapter sleeve (8) and falls into central tube (6) wherein for sliding sleeve fuse (2), and one end is connected in adapter sleeve (8), the other end and clamps under central tube outer wall supports the bullet pawl (7) of lower contact (9); Described lower contact (9) removably connects with adapter sleeve (8).
3. a kind of well fracturing acidification technique tubing string according to claim 2, is characterized in that, described lower contact (9) is connected with adapter sleeve (8) by shear pin (10).
4. a kind of well fracturing acidification technique tubing string according to claim 3, is characterized in that, the shearing force size of described shear pin (10) is 5～50T.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420000944.4U CN203685152U (en) | 2014-01-02 | 2014-01-02 | Oil-gas well fracture acidizing technique pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420000944.4U CN203685152U (en) | 2014-01-02 | 2014-01-02 | Oil-gas well fracture acidizing technique pipe |
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|---|---|
| CN203685152U true CN203685152U (en) | 2014-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420000944.4U Withdrawn - After Issue CN203685152U (en) | 2014-01-02 | 2014-01-02 | Oil-gas well fracture acidizing technique pipe |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105003227A (en) * | 2015-08-03 | 2015-10-28 | 中国石油集团川庆钻探工程有限公司 | Separable hydraulic sliding sleeve for oil-gas well |
| CN103711470B (en) * | 2014-01-02 | 2016-03-16 | 四川省威尔敦化工有限公司 | A kind of well fracturing acidification technique tubing string and removing method thereof |
| CN112696184A (en) * | 2021-03-24 | 2021-04-23 | 四川省威沃敦化工有限公司 | Fracturing construction method for oil and gas well |
| CN112746834A (en) * | 2021-03-22 | 2021-05-04 | 四川省威沃敦化工有限公司 | Preset casing segmented valve type segmented fracturing method and special tool thereof |
| US12109777B1 (en) | 2023-04-04 | 2024-10-08 | Qingdao Qingflex Hose Factory | Acid fracturing hose and preparation method thereof |
-
2014
- 2014-01-02 CN CN201420000944.4U patent/CN203685152U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103711470B (en) * | 2014-01-02 | 2016-03-16 | 四川省威尔敦化工有限公司 | A kind of well fracturing acidification technique tubing string and removing method thereof |
| CN105003227A (en) * | 2015-08-03 | 2015-10-28 | 中国石油集团川庆钻探工程有限公司 | Separable hydraulic sliding sleeve for oil-gas well |
| CN105003227B (en) * | 2015-08-03 | 2018-05-25 | 中国石油集团川庆钻探工程有限公司 | separable hydraulic sliding sleeve for oil-gas well |
| CN112746834A (en) * | 2021-03-22 | 2021-05-04 | 四川省威沃敦化工有限公司 | Preset casing segmented valve type segmented fracturing method and special tool thereof |
| CN112696184A (en) * | 2021-03-24 | 2021-04-23 | 四川省威沃敦化工有限公司 | Fracturing construction method for oil and gas well |
| CN112696184B (en) * | 2021-03-24 | 2021-06-22 | 四川省威沃敦化工有限公司 | Fracturing construction method for oil and gas well |
| US12109777B1 (en) | 2023-04-04 | 2024-10-08 | Qingdao Qingflex Hose Factory | Acid fracturing hose and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140702 Effective date of abandoning: 20160316 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |