CN206581900U - A kind of multistage ignites the safe tubing string of explosion fracturing step by step - Google Patents
A kind of multistage ignites the safe tubing string of explosion fracturing step by step Download PDFInfo
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- CN206581900U CN206581900U CN201720185047.9U CN201720185047U CN206581900U CN 206581900 U CN206581900 U CN 206581900U CN 201720185047 U CN201720185047 U CN 201720185047U CN 206581900 U CN206581900 U CN 206581900U
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- screen casing
- explosion fracturing
- multistage
- tubing string
- drilling rod
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Abstract
The safe tubing string of explosion fracturing is ignited step by step the utility model discloses a kind of multistage, including at least two sections explosion fracturing instruments, the explosion fracturing instrument is by a pressure drilling initiator being sequentially connected from top to bottom, one time-delay mechanism and at least one bear gun are constituted, supercharging device is connected with turn from top to bottom between every section of explosion fracturing instrument, small screen casing and big screen casing, drilling rod and crossover sub are connected between the small screen casing and big screen casing, damper is additionally provided between the drilling rod, the crossover sub is used for jointed rod and damper, drilling rod and pressure drilling initiator, drilling rod and small screen casing, drilling rod and big screen casing.The utility model tubing string can realize that one-trip string multistage ignites explosion fracturing step by step, to reduce the number of times that makes a trip, save operating cost and activity duration, can improve single-stage gunpowder consumption, and ensure working string security.
Description
Technical field
The utility model is related to oil gas body mechanical field, in particular, is to be related to a kind of multistage to ignite detonation pressure step by step
Split safe tubing string.
Background technology
Explosion fracturing is to produce one that high temperature and high pressure gas carry out pressure break to stratum using gunpowder or propellant combustion
Technological means, also known as high enegry gas fracturing.This technology is particularly suitable for because operation is simple, low-cost, effect is protruded
The fracturing yield increasing of the oily cap oil reservoir of bottom water.
But there is the larger multicompletion well and horizontal well of a large amount of reservoir spans in current land or offshore oilfield, existing quick-fried
There is more drawback in combustion fracturing string：Or can not implement, it is necessary to which repeatedly these reservoirs could be covered by removing well operations, to exist step by step
Activity duration and the huge waste of expense；Or there is a situation where risk that secondary explosion fracturing can not ignite and costly；Or
There is the hidden danger that efficiency of combustion is detained remains and trouble of lost tool in hole；Or without security control instrument, there is peace in explosion fracturing working string
Full hidden danger.
Patent CN101619654 discloses a kind of pulse fracturing sand injector for horizontal wells, patent CN105625946 and disclosed
Coal bed gas horizontal well supercritical CO 2 jet makes chamber and many segment sync explosion fracturing methods, and these patents can carry out multistage simultaneously
Ignite, it is impossible to which realization is ignited step by step, such as runs into that operation well section is long, and interlayer gun large usage quantity is costly, and if powder volume is big
If, there is potential safety hazard in explosion fracturing working string；Patent CN1916357 discloses Oil/gas Well high energy gas fracture
Device, CN202117649 disclose Multi-pulse sand-adding high-energy gas fracture bomb, patent CN102337878 and disclose a kind of focus
Fiery high energy gas pulse fracturing device, patent CN102839957 disclose a kind of pulse detonation pressure for superhigh-temperature and-pressure well
Split device, these patents in addition to it there is tubing string security hidden trouble, propagation of explosion distance it is big then there is secondary detonation pressure
The risk that can not be ignited is split, the effect and appropriateness for being mainly used in multistage pulses fracture extension expand gunpowder coverage；Patent
CN101737027 discloses a kind of high energy gas fracturing device of oil reservoirs of horizontal well, can not be ignited except there is secondary explosion fracturing
Outside risk, the security control mode of device using can combustion material composition, there is efficiency of combustion and be detained remains and trouble of lost tool in hole
Hidden danger.
In summary, a kind of multistage is lacked at present and ignites the safe tubing string of explosion fracturing step by step.
Utility model content
The purpose of this utility model is to overcome deficiency of the prior art to ignite detonation pressure step by step there is provided a kind of multistage
Split safe tubing string.The tubing string can realize that one-trip string multistage ignites explosion fracturing step by step, to reduce the number of times that makes a trip, save and make
Industry expense and activity duration, single-stage gunpowder consumption can be improved, and ensure working string security.
The purpose of this utility model is achieved through the following technical solutions：
A kind of multistage ignites the safe tubing string of explosion fracturing, including at least two sections explosion fracturing instruments, the detonation pressure step by step
Instrument is split by the pressure drilling initiator, a time-delay mechanism and at least one bear gun structure that are sequentially connected from top to bottom
Into, be connected with supercharging device, small screen casing and big screen casing between every section of explosion fracturing instrument in turn from top to bottom, the small screen casing and
It is connected between big screen casing between drilling rod and crossover sub, the drilling rod and is additionally provided with damper, the crossover sub is used to connect
Drilling rod and damper, drilling rod and pressure drilling initiator, drilling rod and small screen casing, drilling rod and big screen casing.
The bottom of safe tubing string is provided with gun breech.
The multistage is at least more than two sections.
It is connected at the 3rd drilling rod being connected on the explosion fracturing instrument with pressure drilling initiator described at least one
Damper.
The bear gun is connected in series when being more than one.
It is each during span≤100m between two sections of explosion fracturing instruments that a supercharging device, small screen casing and big screen casing are set；Two
It is each within every 100m that a supercharging device, small screen casing and big screen casing are set between section explosion fracturing instrument during span ＞ 100m；
A pressure drilling initiator is additionally provided with before each supercharging device beyond 100m.
The time-delay mechanism can provide the ignition delay of 5-7 minutes.
Compared with prior art, the beneficial effect that the technical solution of the utility model is brought is：
1. effective supplement of pair current explosion fracturing tubing string：Tubing string is applied to multicompletion well and horizontal well.
2. segmentation explosion fracturing can be realized, while reservoir span and segments are unrestricted：Using one or more superchargings
The tool assemblies such as device, one or more small screen casings and big screen casing, reduce the number of times that makes a trip, when saving operating cost and operation
Between.
Ignited step by step 3. can realize：Using two or more time-delay mechanism tool assemblies simultaneously, it is to avoid a large amount of gunpowder draw
The quick-fried risk to tubing string.
4. improve working string security：If using the tool assemblies such as two or more dampers, dry pipe, integral tube
Post security is improved, while single hop gunpowder consumption can be lifted further.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Reference：1- drilling rods, 2- crossover subs, 3- dampers, 4- pressure drilling initiators, 5- time-delay mechanisms, 6- pressures
Split rifle, 7- supercharging devices, the small screen casings of 8-, the big screen casings of 9-, 10- gun breeches,
Embodiment
To make the utility model be easier to be understood, below in conjunction with drawings and examples to technology of the present utility model
Scheme and its technique effect are explained in detail.
Reference picture 1, the multistage of the present utility model suitable for multicompletion well and horizontal well ignites explosion fracturing peace step by step
Full tubing string, including many drilling rods 1, multiple crossover subs 2, one or more dampers 3, two or more pressure drilling initiators
4th, two or more time-delay mechanisms 5, two or more bear gun 6, one or more supercharging devices 7, one or more small screen casings
8th, one or more big screen casings 9, a gun breech 10.Drilling rod 1 is used for the basic connection of overall tubing string, and crossover sub 2 is used to connect
Drilling rod 1 and damper 3, drilling rod 1 and pressure drilling initiator 4, drilling rod 1 and small screen casing 8, drilling rod 1 and big screen casing 9, every section of detonation
The basic order of connection of fracturing tool from top to bottom be pressure drilling initiator 4, time-delay mechanism 5 and bear gun 6, supercharging device 7,
Small screen casing 8, big screen casing 9 are located between every section of explosion fracturing instrument, and the He of crossover sub 2 is reconnected between small screen casing 8 and big screen casing 9
Drilling rod 1, gun breech 10 is located at the bottom of a whole set of tubing string.
The utility model multistage ignite step by step the safe tubing string of explosion fracturing multistage be at least two sections and more than, according to reservoir
Between span be segmented, number of fragments and span are unrestricted.
Drilling rod 1 and damper 3 are mainly used in strengthening explosion fracturing tube column strength and prevent tubing string from shaking.Explosion fracturing instrument
At least one damper 3 is connected at upper the 3rd drilling rod 1 being connected with pressure drilling initiator 4, but if adjacent two sections of reservoirs
Between span be less than 30m, then need not reconnect dampers 3 in two sections of explosion fracturing Tool Rooms.
In every section of explosion fracturing instrument the quantity of pressure drilling initiator 4 be one, the quantity of time-delay mechanism 5 be one, pressure break
The quantity of rifle 6 is one or more, and multiple bear gun 6 are then directly connected.
Supercharging device 7 is after the epimere explosion fracturing end of job, fluid pressure moment to be transferred into next stage pressure and opened
The instrument of hole initiator, small screen casing 8 and big screen casing 9 are used to connect outside, make hydraulically full in drilling rod.According to number of fragments,
Supercharging device 7, small screen casing 8, big screen casing 9 are sequentially connected between every section of explosion fracturing instrument, if span between adjacent two sections of reservoirs
No more than 100m, three kinds of instruments connection quantity are respectively one, if span is more than 100m between adjacent two sections of reservoirs, according to across
Spend within size, every 100m, three kinds of instruments connection quantity are respectively one；And also set before each supercharging device beyond 100m
It is equipped with a pressure drilling initiator.
Time-delay mechanism 5 is after detonation, it is possible to provide the ignition delay of 5-7 minutes, the ignition step by step for multistage explosion fracturing.
The utility model is effective supplement to current explosion fracturing tubing string, it is adaptable to multicompletion well and horizontal well.It is logical
Cross supercharging device, small screen casing, shaker screen piping tool component, can be achieved segmentation explosion fracturing, while reservoir span and segments not by
Limitation；By time-delay mechanism tool assembly, it can be achieved to ignite step by step, it is to avoid a large amount of gunpowder ignite the risk to tubing string simultaneously；
By drilling rod, damper tool assembly, tubing string security is improved.
The utility model can realize that one-trip string multistage ignites explosion fracturing step by step, reduce the number of times that makes a trip, and save
Operating cost and activity duration, and ensure working string security.
The technical solution of the utility model is schematically described above in association with drawings and examples, but this practicality is new
Type is not limited to above-mentioned embodiment.One of ordinary skill in the art it should be appreciated that in actual applications,
Planform of the present utility model or set-up mode are likely to occur some changes, and other staff may also under its enlightenment
Make the design similar to its.In particular, it is all aobvious and easy without departing from design aim of the present utility model
The change seen, is all contained within protection domain of the present utility model.
Claims (7)
1. a kind of multistage ignites the safe tubing string of explosion fracturing, including at least two sections explosion fracturing instruments step by step, it is characterised in that institute
Explosion fracturing instrument is stated by a pressure drilling initiator being sequentially connected from top to bottom, a time-delay mechanism and at least one pressure
Split and be connected with supercharging device, small screen casing and big screen casing in turn from top to bottom between rifle composition, every section of explosion fracturing instrument, it is described small
It is connected between screen casing and big screen casing between drilling rod and crossover sub, the drilling rod and is additionally provided with damper, the crossover sub is used
In jointed rod and damper, drilling rod and pressure drilling initiator, drilling rod and small screen casing, drilling rod and big screen casing.
2. a kind of multistage ignites the safe tubing string of explosion fracturing step by step according to claim 1, it is characterised in that safe tubing string
Bottom is provided with gun breech.
3. a kind of multistage ignites the safe tubing string of explosion fracturing step by step according to claim 1, it is characterised in that the multistage is extremely
It is more than two sections less.
4. a kind of multistage ignites the safe tubing string of explosion fracturing step by step according to claim 1, it is characterised in that the detonation pressure
Split and be connected at least one described damper at the 3rd drilling rod being connected on instrument with pressure drilling initiator.
5. a kind of multistage ignites the safe tubing string of explosion fracturing step by step according to claim 1, it is characterised in that the bear gun
For more than one when be connected in series.
6. a kind of multistage ignites the safe tubing string of explosion fracturing step by step according to claim 1, it is characterised in that two sections of detonation pressures
It is each when splitting span≤100m between instrument that a supercharging device, small screen casing and big screen casing are set；Between two sections of explosion fracturing instruments
It is each within every 100m that a supercharging device, small screen casing and big screen casing are set during span ＞ 100m；Each supercharging beyond 100m
A pressure drilling initiator is additionally provided with before device.
7. a kind of multistage ignites the safe tubing string of explosion fracturing step by step according to claim 1, it is characterised in that the delay dress
The ignition delay of 5-7 minutes can be provided by putting.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720185047.9U CN206581900U (en) | 2017-02-28 | 2017-02-28 | A kind of multistage ignites the safe tubing string of explosion fracturing step by step |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720185047.9U CN206581900U (en) | 2017-02-28 | 2017-02-28 | A kind of multistage ignites the safe tubing string of explosion fracturing step by step |
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| CN206581900U true CN206581900U (en) | 2017-10-24 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108222911A (en) * | 2017-12-27 | 2018-06-29 | 中国海洋石油集团有限公司 | A kind of horizontal bare hole well volume increase completion tubular column and connection make method |
| CN111550229A (en) * | 2020-05-12 | 2020-08-18 | 燕山大学 | Heat conduction detonation delaying fracturing device and construction method |
| CN112878973A (en) * | 2021-01-22 | 2021-06-01 | 中国矿业大学 | Shale reservoir methane in-situ multistage pulse energy-gathering blasting fracturing method |
| CN113982556A (en) * | 2021-10-08 | 2022-01-28 | 中国矿业大学 | Step-by-step energy-gathering blasting fracturing unconventional gas reservoir enhanced extraction system and method |
-
2017
- 2017-02-28 CN CN201720185047.9U patent/CN206581900U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108222911A (en) * | 2017-12-27 | 2018-06-29 | 中国海洋石油集团有限公司 | A kind of horizontal bare hole well volume increase completion tubular column and connection make method |
| CN108222911B (en) * | 2017-12-27 | 2020-03-20 | 中国海洋石油集团有限公司 | Horizontal open hole well production increasing completion pipe string and combined operation method |
| CN111550229A (en) * | 2020-05-12 | 2020-08-18 | 燕山大学 | Heat conduction detonation delaying fracturing device and construction method |
| CN112878973A (en) * | 2021-01-22 | 2021-06-01 | 中国矿业大学 | Shale reservoir methane in-situ multistage pulse energy-gathering blasting fracturing method |
| CN112878973B (en) * | 2021-01-22 | 2021-12-21 | 中国矿业大学 | Shale reservoir methane in-situ multistage pulse energy-gathering blasting fracturing method |
| CN113982556A (en) * | 2021-10-08 | 2022-01-28 | 中国矿业大学 | Step-by-step energy-gathering blasting fracturing unconventional gas reservoir enhanced extraction system and method |
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