CN108361001A - A kind of deep trona drilling well exploitation cementing stage technique - Google Patents
A kind of deep trona drilling well exploitation cementing stage technique Download PDFInfo
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- CN108361001A CN108361001A CN201810022630.7A CN201810022630A CN108361001A CN 108361001 A CN108361001 A CN 108361001A CN 201810022630 A CN201810022630 A CN 201810022630A CN 108361001 A CN108361001 A CN 108361001A
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- Prior art keywords
- well
- cementing
- deep
- trona
- cement
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Classifications
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- 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
Abstract
The invention discloses a kind of deep trona drilling wells to exploit cementing stage technique, includes the following steps：First, full pit shaft is segmented, be installed in series formation packer and sizing collar on well cementing casing pipe；Then, sealing is carried out to lower part casing well section using the method for direct circulation, formation packer rubber plug is first opened, is allowed to closed with the borehole wall, separate cement down going channel, then sizing collar is opened, first order cementing well operation is proceeded by, after cement mortar has been noted, turn off sizing collar, second level cementing well operation is carried out to top well section again after cement mortar initial set, until after theing cement solidifies, bores rubber plug lower center tube completion.Full well is divided into two parts by the present invention according to geological conditions and underground situation, it is high to solve pressure in a previous well cementing process, not high problem is returned on easy pressure leakage stratum or lost-circulation zone top cement mortar face and substantially increases into well quality, extends producing well service life.
Description
Technical field
The invention belongs to natural alkali mine deep dissolution mining by drilling, shaft building cementing stage technology field, more particularly to
A kind of deep trona drilling well exploitation cementing stage technique.
Background technology
Currently, for burying deeper solubility salt（Trona, saltcake, rock salt etc.）The exploitation in mineral deposit, both at home and abroad
Using dissolution mining by drilling method, that is, drilling equipment is utilized, drill bit is drilled by drilling rod by target zone, then descends protective casing respectively
And production casing, it is cemented the well respectively with oil-well cement, then lower center tube, wellhead assembly is installed, that is, complete building for producing well
Make process.
Trona well casing programme has used for reference the casing programme of oil well substantially, cementing method and technique also basic and oil well
Equally, cement direct circulation well cementation method is taken.But with being continuously increased for exploitation solubility（More than 2500 meters）, static bottom-hole pressure reaches by force
30MPa or more, with the continuous growth of mining time, down-hole formation constantly changes, and water burst occur in more well sections or leak is existing
As subsurface picture becomes increasingly complex, and stratigraphic structure band, which forms, gushes leakage same layer phenomenon, former to anchorage band great challenge
Some cementing methods and technique can not adapt to existing complicated geological present situation.Due to well depth, primary bottom hole cement slurry pressure of cementing the well
It is strong excessive（More than 40MPa）, it is easy pressure leakage stratum, or blow section cement mortar is caused to be missed, it is not high to cause to return plug face on cement mortar,
Plug face is returned on or and returns high undesirable, at well quality degradation, affects the exploitation in mineral deposit.
Invention content
In order to overcome the disadvantages mentioned above of the prior art, the present invention to propose a kind of deep trona drilling well exploitation cementing stage
Technique is split by each section to well bore, takes the method for cementing stage, and exploitation deep solubility salt mine is thoroughly solved
Bed, dissolution mining by drilling improve the technology of cementing quality at the ropy problem of well.
In order to achieve the above objectives, the technical solution adopted by the present invention is a kind of deep trona drilling well exploitation cementing stage
Technique includes the following steps：First, full pit shaft is segmented, is generally selected in 50-80 meters of the top of lost-circulation zone or water burst layer
Position, be installed in series formation packer and sizing collar on well cementing casing pipe；Then use the method for direct circulation to lower part cased well
Duan Jinhang sealing first opens formation packer rubber plug, is allowed to closed with the borehole wall, separates cement down going channel；Then, open classification
Hoop, proceeds by first order cementing well operation and turns off sizing collar after cement mortar has been noted, after cement mortar initial set again
Second level cementing well operation is carried out to top well section, until after theing cement solidifies, bores rubber plug lower center tube completion；Finally, it tears open
Manifold, which is waited, to coagulate, and lower rock bit plays attachment, you can carries out acoustic amplitude logging, examines cementing quality.
Further, the formation packer is under, and sizing collar is in upper, the intermediate distance that can be spaced a casing.
Further, the first order cementing well operation, it is one hour pre-hardening after the completion, you can to carry out second level water filling
Mud well cementing operation.
Further, the formation packer include the box cupling designed successively from top to bottom, it is central tube, packing element, valve body, short
Section, the box cupling, packing element, valve body are sleeved on from top to bottom in the pipe outer wall of center, and the body base is connected to pipe nipple, the valve
Body includes pressure limiting valve, ball-and-seat, lock valve, and the valve body is equipped with trip arm.
Compared with prior art, the present invention has the following advantages：
Full well is divided into two parts by the present invention according to geological conditions and underground situation, is solved and is pressed in a previous well cementing process
Qiang Gao is easy to return not high problem on pressure leakage stratum or lost-circulation zone top cement mortar face, substantially increases into well quality, extend life
Produce the service life of well.The invention is split well bore for each section, takes the method for cementing stage, and thoroughly solving exploitation deep can
Dissolubility salt deposit, dissolution mining by drilling improve the technology of cementing quality at the ropy problem of well；Especially deep is bored
Well is molten to adopt well cementation, very useful, it solve the problems, such as when deep-well, ultradeep well well cementation cement pressure leakage stratum can not on return, solve
Lost-circulation zone cementing concrete can not on the problem of returning cement, brought to work convenient very big.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments described in application, for those of ordinary skill in the art, without creative efforts,
Other drawings may also be obtained based on these drawings.
Fig. 1 show the formation packer structural schematic diagram of the present invention；
Fig. 2 show sizing collar appearance diagram of the present invention；
Fig. 3 show flexible plug structure schematic diagram of the invention；
Fig. 4 show flexible obturating plug structural schematic diagram of the invention；
Fig. 5 show gravity-type of the present invention and opens plug structure schematic diagram；
Fig. 6 show shut-off plug structural schematic diagram of the present invention；
Fig. 7 show the present invention and replaces rubber plug structural schematic diagram.
Specific implementation mode
It is described in detail below in conjunction with the technical solution in the embodiment of the present invention：
Shown in Fig. 1, formation packer includes the box cupling 1 designed successively from top to bottom, central tube 2, packing element 3, valve body 4, short
Section 9, the box cupling 1, packing element 3, valve body 4 are sleeved on from top to bottom on 2 outer wall of central tube, and 4 bottom of the valve body is connected to pipe nipple
9, the valve body 4 includes pressure limiting valve 5, ball-and-seat 6, lock valve 7, and the valve body 4 is equipped with trip arm 8.In the construction process, when
Replace rubber plug 10 by formation packer valve body 4 when, the trip arm 8 being sealed on inlet opening is touched it is disconnected, when replace rubber plug 10 transport
When row is to spoiler 11, make to form sealing in casing（The pipes string process structure such as pitching or blind plate, which can also be used, to be made to be formed in casing
Sealing, because these process duct string structures pass through without rubber plug, it is necessary to bar should be will be switched off in advance and laid down）, liquid is through valve system when building the pressure
Inlet opening enters lock valve 7, and the pin when pressure reaches setting value on lock valve 7 is cut, and lock valve 7 is opened, while single
Stream valve 6 is also opened, and liquid enters through pressure limiting valve 5 in the expansion chamber between central tube 2 and packing element 3, makes formation packer expansion and well
Wall is in close contact to form sealing.When the pressure in expansion chamber reaches the setting value of 5 pin of pressure limiting valve, pin is cut, pressure limiting valve 5
Inlet opening is closed in closing, and the size for covering overpressure at this time has no effect to the pressure in expansion chamber, realizes that safety is setting,
It is zero that well head, which is bled off pressure, 7 auto lock of lock valve, realizes permanent close.
Referring to shown in Fig. 1-7, specific workflow of the invention is as follows：
First, full pit shaft is segmented, 50-80 meters of the top position of lost-circulation zone or water burst layer is generally selected in, by above-mentioned stratum
Packer and sizing collar are connected on well cementing pipe string, and formation packer is under, and for sizing collar upper, centre can be spaced casing
The lowered position of distance, formation packer is as needed, and by prior designed predetermined well depth, G.I.H, pipe seal in well successively
Afterwards, manifold of ground, device standby are connected；Then the method for using direct circulation, circulating mud ensure that manifold is unimpeded, are set by well cementation
Meter requires, first to lower part（Below formation packer）Well section carries out first order cementing well operation, after the completion initial set one hour,
After cement mortar has been noted, sizing collar is turned off, second level cementing well work is carried out to top well section again after cement mortar initial set
Industry bores rubber plug lower center tube completion until after theing cement solidifies；Finally, it tears manifold open and waits and coagulate, lower rock bit plays attachment, you can into
Cementing quality is examined in row acoustic amplitude logging.
By above-mentioned formation packer operating instruction, packer rubber plug is first opened, is allowed to closed with the borehole wall, separates cement downlink
Channel ensures that cement only has data feedback channel, then opens sizing collar circulation port, and turn on pump cycle examines formation packer and the borehole wall
Whether closed, whether data feedback channel is unimpeded, after flexibility plug is mounted in by flexible obturating plug in cementing head, after cycle is good, by well cementation
Design requirement carries out first order cementing job, by pressing flexible plug, replacing mud, bruising, termination of pumping, realizes to discharge from well head and press
Power, rear gravity of throwing opens plug, by shut-off plug in cementing head, when estimated gravity obturating plug is after on sizing collar low sleeve, and turn on pump
It builds the pressure, opens sizing collar circulation port cycle, carry out second level cementing well operation by cementing design requirement, cement mortar has been noted
Afterwards, it presses shut-off plug, for mud, bruising, termination of pumping, is released stress from well head, until closing sizing collar circulation port, finally examine and close
Whether set really closes.
This invented technology is suitable for solubility salt mineral deposit drilling well solution mining, especially molten to deep drilling well to adopt well cementation,
It is very useful, it solve the problems, such as deep ＆ ultra-deep well cementing concrete pressure leakage stratum can not on return, solve lost-circulation zone cementing concrete
Can not on return cement problem, to work band facility it is very big.
It the above is only the specific implementation mode of the application, it is noted that be that those skilled in the art come
It says, under the premise of not departing from the application principle, several improvements and modifications can also be made, these improvements and modifications also should be regarded as
The protection domain of the application.
Claims (4)
1. cementing stage technique is exploited in a kind of deep trona drilling well, which is characterized in that include the following steps：First, to full well
Cylinder is segmented, and is generally selected in 50-80 meters of the top position of lost-circulation zone or water burst layer, be installed in series stratum on well cementing casing pipe
Packer and sizing collar；Then, sealing is carried out to lower part casing well section using the method for direct circulation, first opens formation packer glue
Plug, is allowed to closed with the borehole wall, separates cement down going channel, then opens sizing collar, proceeds by first order cementing well work
Industry turns off sizing collar after cement mortar has been noted, and second level cementing well is carried out to top well section again after cement mortar initial set
Operation bores rubber plug lower center tube completion until after theing cement solidifies；Finally, it tears manifold open and waits and coagulate, lower rock bit plays attachment, you can
Acoustic amplitude logging is carried out, cementing quality is examined.
2. cementing stage technique is exploited in a kind of deep trona drilling well according to claim 1, which is characterized in that describedly
Layer packer is under, and sizing collar is in upper, the intermediate distance that can be spaced a casing.
3. cementing stage technique is exploited in a kind of deep trona drilling well according to claim 1, which is characterized in that described the
Level-one cementing well operation, it is one hour pre-hardening after the completion, you can to carry out second level cementing well operation.
4. cementing stage technique is exploited in a kind of deep trona drilling well according to claim 1, which is characterized in that describedly
Layer packer includes the box cupling designed successively from top to bottom, central tube, packing element, valve body, pipe nipple, and the box cupling, packing element, valve body are certainly
It is sleeved on central tube outer wall under above, the body base is connected to pipe nipple, and the valve body includes pressure limiting valve, ball-and-seat, lock
Tight valve, the valve body are equipped with trip arm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810022630.7A CN108361001A (en) | 2018-01-10 | 2018-01-10 | A kind of deep trona drilling well exploitation cementing stage technique |
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| CN201810022630.7A CN108361001A (en) | 2018-01-10 | 2018-01-10 | A kind of deep trona drilling well exploitation cementing stage technique |
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| CN108361001A true CN108361001A (en) | 2018-08-03 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110714737A (en) * | 2019-11-09 | 2020-01-21 | 中为(上海)能源技术有限公司 | Well cementation system and method for coal underground gasification process |
| CN110905441A (en) * | 2018-09-17 | 2020-03-24 | 中国石油化工股份有限公司 | Well cementation method of low-pressure easy-to-leak well and casing string |
| CN111021982A (en) * | 2018-10-09 | 2020-04-17 | 中国石油天然气股份有限公司 | Well cementing method and well cementing device |
| CN111101886A (en) * | 2018-10-25 | 2020-05-05 | 中国石油化工股份有限公司 | Sectional well cementing tool and technological method |
| CN114109297A (en) * | 2020-08-25 | 2022-03-01 | 中国石油化工股份有限公司 | Stage cementing method |
| CN114109299A (en) * | 2020-08-27 | 2022-03-01 | 中国石油化工股份有限公司 | Stage cementing device and method for top cementing |
| CN116163673A (en) * | 2023-04-25 | 2023-05-26 | 中国石油大学(华东) | Micro-pressure control device and method for deep water shallow gradient well cementation circulating wellhead |
| CN114109299B (en) * | 2020-08-27 | 2024-04-19 | 中国石油化工股份有限公司 | Stage cementing device for top cementing and method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110905441A (en) * | 2018-09-17 | 2020-03-24 | 中国石油化工股份有限公司 | Well cementation method of low-pressure easy-to-leak well and casing string |
| CN111021982A (en) * | 2018-10-09 | 2020-04-17 | 中国石油天然气股份有限公司 | Well cementing method and well cementing device |
| CN111021982B (en) * | 2018-10-09 | 2022-03-29 | 中国石油天然气股份有限公司 | Well cementing method and well cementing device |
| CN111101886A (en) * | 2018-10-25 | 2020-05-05 | 中国石油化工股份有限公司 | Sectional well cementing tool and technological method |
| CN111101886B (en) * | 2018-10-25 | 2023-08-04 | 中国石油化工股份有限公司 | Sectional well cementation tool and process method |
| CN110714737A (en) * | 2019-11-09 | 2020-01-21 | 中为(上海)能源技术有限公司 | Well cementation system and method for coal underground gasification process |
| CN114109297A (en) * | 2020-08-25 | 2022-03-01 | 中国石油化工股份有限公司 | Stage cementing method |
| CN114109299A (en) * | 2020-08-27 | 2022-03-01 | 中国石油化工股份有限公司 | Stage cementing device and method for top cementing |
| CN114109299B (en) * | 2020-08-27 | 2024-04-19 | 中国石油化工股份有限公司 | Stage cementing device for top cementing and method thereof |
| CN116163673A (en) * | 2023-04-25 | 2023-05-26 | 中国石油大学(华东) | Micro-pressure control device and method for deep water shallow gradient well cementation circulating wellhead |
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Application publication date: 20180803 |