CN106223857B - A kind of continuous circulator of casing job and method - Google Patents
A kind of continuous circulator of casing job and method Download PDFInfo
- Publication number
- CN106223857B CN106223857B CN201610711887.4A CN201610711887A CN106223857B CN 106223857 B CN106223857 B CN 106223857B CN 201610711887 A CN201610711887 A CN 201610711887A CN 106223857 B CN106223857 B CN 106223857B
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- casing
- packer
- continuous
- pipe
- wellbore
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- 238000000034 method Methods 0.000 title claims description 10
- 239000012530 fluid Substances 0.000 claims abstract description 39
- 210000002445 nipple Anatomy 0.000 claims abstract description 34
- 238000007616 round robin method Methods 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims description 28
- 239000003292 glue Substances 0.000 claims description 16
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000005553 drilling Methods 0.000 abstract description 35
- 230000000694 effects Effects 0.000 abstract description 8
- 238000007789 sealing Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 5
- 230000002411 adverse Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000009096 changqing Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000004519 manufacturing process 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
- 238000012856 packing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The present invention provides a kind of continuous circulator of casing job, including wellbore and casing, described sleeve pipe forms bunch tube with the sequentially connected speciality pipe nipple in lower end, float collar, the bunch tube is located in wellbore, continuous pipe is equipped in the casing, the continuous pipe lower end is connected with packer, and the packer is located in special pipe nipple, and check valve is equipped between the packer and continuous pipe.The inner cavity of special pipe nipple（Finish is good, and sealing effect is good）, when ground turn on pump recycles, drilling fluid is by continuously managing, check valve, packer reach shaft bottom, returns out well head from wellbore and casing annulus, complete underground cycle, reach to recycle halfway, but not inside pipe casing is made to be completely filled with the round-robin method of drilling fluid, do not increase the actual load of bunch tube.
Description
Technical field
The present invention relates to oilfield drilling field of engineering technology, the continuous circulator of specifically a kind of casing job and side
Method.
Background technology
Changqing oilfields deep drilling is more and more in recent years, and the large scale bunch tube weight of tripping in is increasing, causes to cover
Pipe load become closer to or more than selected drilling machine maximum safe load, at present drilling design in be according to SY/T6724-
2008《Oil-well rig and workover rig basic configuration standard》To select the drilling machine of dimension.But in actual operation due to big ruler
Very little bunch tube load is larger, often exceeds drilling machine（Such as ZJ50) 20-30 tons of selection standard, it should such as be used instead compared with wammel by design standard
Machine（Such as ZJ70), but unnecessary waste , Give drilling engineering designs is caused to bring great difficulty.
For the above technical barrier, there is following technical scheme in Drilling Design at present：
1, during Drilling Design, consider the effect of casing buoyancy, this reduces casing actual weight, i.e. casing is real
Weight * 0.862 in border weight=casing air；
2, during Drilling Design, consider casing buoyancy effect simultaneously, if casing actual weight is still greater than drilling machine
Load will consider that the inside of bunch tube is emptied, that is, has one section at this time（Top）Bunch tube is not in the milk, and makes the practical heavy of bunch tube
Amount further decreases；
3, during setting of casing.Applied pressure by annulus achievees the effect that improve bunch tube overall buoyancy；
In above-mentioned 3 technical solutions, if midway needs drilling fluid to be followed due to the problems such as wellbore necking down, chip off-falling, leakage
When ring, practical empty of bunch tube has been not present, and bunch tube load will be greater than drilling machine maximum load, is coped at present without effective technology
Measure.
Invention content
In order to overcome above-mentioned problems of the prior art, the present invention provides a kind of casing jobs continuously to recycle dress
It sets and method, the present invention during casing empties tripping in, can recycle, but not inside pipe casing is made all to fill halfway in operation
The round-robin method of fully-jewelled well liquid, casing can recycle and increase bunch tube actual load when making to go into the well.
The technical solution adopted by the present invention is：
A kind of continuous circulator of casing job, including wellbore and casing, described sleeve pipe and the sequentially connected spy in lower end
Matter pipe nipple, float collar form bunch tube, and the bunch tube is located in wellbore, and continuous pipe, the company are equipped in the casing
Continuous pipe lower end is connected with packer, and the packer is located in special pipe nipple, is equipped between the packer and continuous pipe unidirectional
Valve.
The packer lower end is equipped with nozzle.
The packer is glue barrel type packer.
The internal diameter of the speciality pipe nipple is bigger 2mm than conventional cannula, and finish reaches 7.
The length of the speciality pipe nipple is 1-1.5m.
Described sleeve pipe outer diameter 244.5mm；The continuous pipe outside diameter 62mm.
A kind of continuous round-robin method of casing job, the specific steps are：
The step 1 bunch tube that tripping in casing, special pipe nipple and float collar are connected in sequence into wellbore, by the set of tripping in
Pipe is sitting in well head；
Continuous pipe, check valve and packer are sequentially connected by step 2, and will be full of circulation fluid in the continuous pipe connected
Afterwards in the casing at tripping in well head；
Step 3 by under the packer in step 2 at the special pipe nipple in step 1 after carry out turn on pump cycle；
After step 4 completes cycle, circulating pump is closed, and above carry continuous pipe and go out well head；
After the completion of step 5 cycle, continue setting of casing；
Step 6 is during subsequent setting of casing, when being recycled, repeats the above steps, until fulfiling assignment.
In the step 3 turn on pump cycle the specific steps are：
Circulation fluid is entered continuous tube cavity by the first step by the circulating pump on ground, and the circulation fluid in inner cavity is in pressure
Promotion downlink under at check valve, pressure rises 1.5MPa；
The circulating liquid of the continuous tube cavity of second step opens check valve under the action of high pressure, and circulation fluid enters packing
In device, the liquid thick stick uplink of packer is pushed, compresses glue bucket, sets the annular space of continuous pipe and casing；
After third walks the circulating liquid compression glue bucket in packer, the nozzle of packer bottom is opened, circulating liquid enters
Shaft bottom；
4th stepping enters the circulating liquid in shaft bottom under the action of geostatic pressure, into the annular space of wellbore and casing, returns out
Ground.
Beneficial effects of the present invention are：
The present invention can carry out midway circulating fluid during setting of casing, and inside pipe casing will not be made to be full of drilling well
Liquid meets and empties state during casing tripping in, reduces tripping in set tube load, ensures the safety of casing tripping in, save
Drilling cost.The packer that the present invention uses is glue barrel type, and the packer of glue barrel type can effectively be set, the effect set
Good, sealing performance is strong.The special pipe nipple equally used is that the inner wall of conventional pipe nipple is carried out sanding and polishing so that pipe nipple inner wall
Glossiness reaches 7, and when the pipe nipple being prepared out is packer setting, surface tension becomes larger and packer contact surface
Leakproofness enhance, while also prevent circulation fluid adverse current, reached bidirectional protective with check valve.
Description of the drawings
The continuous round-robin method schematic diagram of Fig. 1 casing jobs
In figure, reference numeral：1, well head；2, wellbore；3, casing；4, continuous pipe；5, check valve；6, packer；7, nozzle；
8, speciality pipe nipple；9, float collar.
Specific implementation mode
Embodiment 1:
When needing drilling fluid to be recycled the problems such as wellbore necking down, chip off-falling, leakage to overcome, bunch tube is practical to be emptied not
In the presence of the problem of bunch tube load will be greater than drilling machine maximum load, the present invention provides a kind of casing job as shown in Figure 1 and connects
Continuous circulator and method, the present invention during casing empties tripping in, can recycle, but not make in casing halfway in operation
Portion is completely filled with the round-robin method of drilling fluid, and casing can recycle and increase bunch tube actual load when making to go into the well.
A kind of continuous circulator of casing job, including wellbore 2 and casing 3, described sleeve pipe 3 and lower end are sequentially connected
Speciality pipe nipple 8, float collar 9 form bunch tube, and the bunch tube is located in wellbore 2, and continuous pipe 4, institute are equipped in the casing 3
4 lower end of continuous pipe stated is connected with packer 6, and the packer 6 is located in special pipe nipple 8, the packer 6 and continuous pipe 4
Between be equipped with check valve 5.
In the present embodiment, it is pumped into circulation fluid into the continuous pipe 4 of well head 1, is recycled under the action of gravity is with geostatic pressure
Liquid downlink enters packer 6 by check valve 5, and the circulation fluid after is after pressure enhances 2 MPa so that packer swells
It is set with special pipe nipple 8, and opens the nozzle 7 of 6 bottom of packer so that circulation fluid enters 2 bottom of wellbore by nozzle 7
Portion, circulation fluid return to ground under the effect of external force, from the annular space of wellbore 2 and casing 3.
This special pipe nipple that the present invention uses, simple in structure, operating cost is low and effectively prevents 2 necking down of wellbore, falls
When the problems such as block, leakage needs drilling fluid to be recycled, practical empty of bunch tube has been not present, and bunch tube load will be greater than drilling machine most
The problem of big load.
Embodiment 2：
On the basis of embodiment 1, in the present embodiment, 6 lower end of packer is equipped with nozzle 7.
The packer 6 is glue barrel type packer.
The internal diameter of the speciality pipe nipple 8 is bigger 2mm than conventional cannula, and finish reaches 7.
The length of the speciality pipe nipple 8 is 1-1.5m.
3 outer diameter 244.5mm of described sleeve pipe；4 outer diameter 62mm of the continuous pipe.
The packer 6 that the present invention uses is glue barrel type, and the packer 6 of glue barrel type can effectively be set, the effect set
Good, sealing performance is strong.The special pipe nipple 8 equally used is that the inner wall of conventional pipe nipple is carried out sanding and polishing so that pipe nipple inner wall
Glossiness reach 7, when the pipe nipple being prepared out is that packer 6 is set, surface tension becomes larger to be connect with packer 6
The leakproofness of contacting surface enhances, while also preventing circulation fluid adverse current, has reached bidirectional protective with check valve 5.
Structure of the invention is reasonable and compact, and operability is strong when use, is used when big 3 operation of casing of size under deep-well
The present invention can avoid because borehole wall undergauge, cave in, leakage must recycle when due to " casing is emptied " measure for losing, it is ensured that existing
Production cost is saved in the smooth tripping in of deep-well large scale casing under the conditions of drilling equipment.
Embodiment 3：
A kind of continuous round-robin method of casing job is provided on the basis of above-described embodiment, in the present embodiment, specifically
Step is：
The step 1 bunch tube that tripping in casing 3, special pipe nipple 8 and float collar 9 are connected in sequence into wellbore 2, by tripping in
Casing 3 be sitting in well head 1；
Continuous pipe 4, check valve 5 and packer 6 are sequentially connected by step 2, and are followed being full of in the continuous pipe 4 connected
In casing 3 after ring liquid at tripping in well head 1；
Step 3 by under the packer 6 in step 2 at the special pipe nipple 8 in step 1 after carry out turn on pump cycle；
After step 4 completes cycle, circulating pump is closed, and above carry continuous pipe 4 and go out well head 1；
After the completion of step 5 cycle, continue setting of casing 3；
Step 6 when being recycled, repeats the above steps, during subsequent setting of casing 3 until fulfiling assignment.
In the step 3 turn on pump cycle the specific steps are：
Circulation fluid is entered 4 inner cavity of continuous pipe by the first step by the circulating pump on ground, and the circulation fluid in inner cavity is in pressure
Promotion downlink under at check valve 5, pressure rises 1.5MPa；
The circulating liquid of continuous 4 inner cavity of pipe of second step opens check valve 5 under the action of high pressure, and circulation fluid enters envelope
Every the liquid thick stick uplink in device 6, pushing packer, glue bucket is compressed, the annular space of continuous pipe 4 and casing 3 is set；
After third walks the circulating liquid compression glue bucket in packer 6, the nozzle 7 of 6 bottom of packer, circulating liquid are opened
Into shaft bottom；
4th stepping enters the circulating liquid in shaft bottom under the action of geostatic pressure, into the annular space of wellbore 2 and casing 3, returns
Go out ground.
In the present embodiment, by Drilling Design, 3 lower end of casing is connected into upper special pipe nipple 8；By the casing 3 of tripping in by hanging
Card is sitting in well head 1；Check valve 5, packer 6, continuous pipe 4 are connected through a screw thread；It will be filled in the continuous pipe 4 connected
Full circulation fluid；It will be in the casing 3 at the 4 tripping in well head 1 of continuous pipe that connected；By 6 times special pipe nipples 8 for arriving casing 3 of packer
At position, open cycle pump.
Circulating liquid is acted on by the pressure of circulating pump, into 4 inner cavity of continuous pipe；The circulation fluid of continuous 4 inner cavity of pipe in underground
Body downlink under the promotion of pressure, is recycled at check valve 5, and pressure rises 1.5MPa；The circulating liquid of continuous 4 inner cavity of pipe is in height
Under the action of pressure, check valve 5 is opened, into packer 6；And then the liquid thick stick uplink of packer 6 is pushed, glue bucket is compressed, is sat
Seal the annular space of continuous pipe 4 and casing 3；After circulating liquid compression glue bucket in packer 6, the nozzle 7 of 6 bottom of packer is opened；
Cycle of higher pressure liquid after pressurizeing in this way enters shaft bottom；The circulating liquid in shaft bottom under the action of geostatic pressure, into wellbore 2 with
The annular space of casing 3, and return out ground.
The present invention is in cyclic process, without drilling fluid inside casing 3；The suspending weight of well inner sleeve 3 is the floating of casing 3 at this time
Weight, without the weight of liquid in casing 3,3 gravity of integral cannula alleviates 5-8%.
After completing entire cycle, termination of pumping；Well head 1 above carries continuous pipe 4,20-25 tons of upper lifting force.Glue bucket inside packer 6
It is unsealed under the action of upper lifting force, packer 6 and the special pipe nipple 8 for setting place separate.Due in casing 3 without circulating liquid,
Under the action of pressure difference, the closed check valve inside 3 lower part float collar 9 of casing, prevent the circulating liquid of wellbore 2 and 3 annular space of casing from
In sleeve pipe 3；After cycle stops, the check valve 5 of 4 lower part of continuous pipe is closed under the effect of internal spring force, in continuous pipe 4
The circulating liquid in portion cannot be further continued for flowing out.Without drilling fluid inside casing 3, above carries continuous pipe 4 and go out well head.After the completion of cycle, after
Continuous setting of casing 3, if you need to recycle again, repeats above-mentioned action during subsequent setting of casing 3, until operation is completed.
In this way during lower size big casing, midway circulating fluid can be carried out, and inside pipe casing will not be made to fill
Fully-jewelled well liquid meets and empties state during casing tripping in, reduces tripping in set tube load, ensures the safety of casing tripping in
Property, save drilling cost.
Mesh first three mitigates deep-well large scale casing actual loading technology contrast table
| Technology contents | Feature | |
| Casing is conventional Tripping in method | Deep-well large scale casing tripping in, midway do not fill Drilling fluid | Inside pipe casing and annular space have been completely filled with drilling fluid when midway recycles, big to improve deep-well " casing is emptied " measure of size casing setting ability has been not present, practical large scale set Pipe setting ability reduces. |
| Well head pressurizes When casing under Enter method | Well head add-back pressure, is equivalent to and carries when setting of casing High down-hole drilling fluids density, increase set Pipe buoyancy.Drilling fluid charge | When midway recycles, inside pipe casing and annular space have been completely filled with drilling fluid, to improve deep-well " casing is emptied " measure of large scale casing setting ability has been not present, practical large scale Casing setting ability reduces.Easily ground is laminated and is leaked |
| Continuous Guan Xun Under eyelet thimble Enter method | Well head not drilling fluid charge when setting of casing | When midway recycles, only continuous pipe and annular space have been completely filled with drilling fluid, inside pipe casing Without drilling fluid, " casing is emptied " measure exists, and practical large scale casing setting ability carries Gao Liao. |
There is no the part described in detail to belong to the well known conventional means of the industry in present embodiment, does not chat one by one here
It states.The foregoing examples are only illustrative of the present invention, does not constitute the limitation to protection scope of the present invention, every and sheet
Invent it is same or analogous design all belong to the scope of protection of the present invention within.
Claims (7)
1. a kind of continuous round-robin method of casing job, it is characterised in that：What the continuous round-robin method of casing job used
The continuous circulator of casing job includes wellbore（2）And casing（3）, described sleeve pipe（3）It is sequentially connected special short with lower end
Section（8）, float collar（9）Bunch tube is formed, the bunch tube is located at wellbore（2）Interior, described casing（3）It is interior to be equipped with continuous pipe
（4）, the continuous pipe（4）Lower end is connected with packer（6）, the packer（6）Positioned at special pipe nipple（8）It is interior, the envelope
Every device（6）With continuous pipe（4）Between be equipped with check valve（5）；The continuous round-robin method of casing job the specific steps are：
Step 1 is to wellbore（2）Interior tripping in casing（3）, special pipe nipple（8）And float collar（9）The bunch tube being connected in sequence, will
The casing of tripping in（3）It is sitting in well head（1）；
Step 2 will be managed continuously（4）, check valve（5）And packer（6）The continuous pipe that is sequentially connected, and will connect（4）Inside fill
Tripping in well head after full circulation fluid（1）The casing at place（3）It is interior；
Step 3 is by the packer in step 2（6）Under to the special pipe nipple in step 1（8）Turn on pump cycle is carried out behind place；
After step 4 completes cycle, circulating pump is closed, and above carry continuous pipe（4）Go out well head（1）；
After the completion of step 5 cycle, continue setting of casing（3）；
Step 6 is in subsequent setting of casing（3）In the process, it when being recycled, repeats the above steps, until fulfiling assignment.
2. the continuous round-robin method of a kind of casing job according to claim 1, it is characterised in that：In the step 3
Turn on pump cycle the specific steps are：
Circulation fluid is entered continuous pipe by the first step by the circulating pump on ground（4）Inner cavity, the circulation fluid in inner cavity is in pressure
It pushes and arrives check valve under downlink（5）Place, pressure rise 1.5MPa；
Second step is continuously managed（4）The circulating liquid of inner cavity opens check valve under the action of high pressure（5）, circulation fluid enters envelope
Every device（6）It is interior, the fluid cylinder uplink of packer is pushed, glue bucket is compressed, sets continuous pipe（4）With casing（3）Annular space；
Third walks packer（6）After interior circulating liquid compression glue bucket, packer is opened（6）The nozzle of bottom（7）, circulation fluid
Body enters shaft bottom；
4th stepping enters the circulating liquid in shaft bottom under the action of geostatic pressure, into wellbore（2）With casing（3）Annular space, return
Go out ground.
3. the continuous round-robin method of a kind of casing job according to claim 1, it is characterised in that：The packer
（6）Lower end is equipped with nozzle（7）.
4. the continuous round-robin method of a kind of casing job according to claim 1, it is characterised in that：The packer
（6）For glue barrel type packer.
5. the continuous round-robin method of a kind of casing job according to claim 1, it is characterised in that：The special pipe nipple
（8）Internal diameter it is bigger 2mm than conventional cannula, finish reaches 7.
6. the continuous round-robin method of a kind of casing job according to claim 1, it is characterised in that：The special pipe nipple
（8）Length be 1-1.5m.
7. the continuous round-robin method of a kind of casing job according to claim 1, it is characterised in that：Described sleeve pipe（3）Outside
Diameter 244.5mm；The continuous pipe（4）Outer diameter 62mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610711887.4A CN106223857B (en) | 2016-08-24 | 2016-08-24 | A kind of continuous circulator of casing job and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610711887.4A CN106223857B (en) | 2016-08-24 | 2016-08-24 | A kind of continuous circulator of casing job and method |
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| Publication Number | Publication Date |
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| CN106223857A CN106223857A (en) | 2016-12-14 |
| CN106223857B true CN106223857B (en) | 2018-09-04 |
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| CN109681120B (en) * | 2018-12-21 | 2020-07-28 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Continuous running-in method for casing pipe with ultra-long horizontal section |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2311160C (en) * | 2000-06-09 | 2009-05-26 | Tesco Corporation | Method for drilling and completing a wellbore and a pump down cement float collar for use therein |
| JP4036756B2 (en) * | 2001-04-26 | 2008-01-23 | “アールバーク”・トウンネーラウスバーウ・ゲゼルシヤフト・エム・ベー・ハー | Method and apparatus for opening a hole and fixing a support to the hole |
| CN101608538B (en) * | 2009-07-24 | 2012-12-05 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | External packer of expanding sealing sleeve of internal pipe string tool and construction technique |
| CN201818240U (en) * | 2009-11-04 | 2011-05-04 | 北京澳尔金石油技术开发有限公司 | Circulation tool for casing running |
| CN201567988U (en) * | 2009-12-16 | 2010-09-01 | 中国石油集团渤海钻探工程有限公司 | Automatic grouting circulation device for casing running |
| CN202866744U (en) * | 2012-07-16 | 2013-04-10 | 袁淑英 | Flow restricting self-filling float collar for manifold cycles |
| CN104747081A (en) * | 2013-12-31 | 2015-07-01 | 牡丹江市林海石油打捞工具有限公司 | Casing grout circulating device |
| CN203783536U (en) * | 2014-03-05 | 2014-08-20 | 中国石油化工股份有限公司 | High-pressure gas injection and deep pumping integrated pipe column for ultra-deep well |
| CN105089593A (en) * | 2015-08-03 | 2015-11-25 | 中国石油天然气股份有限公司 | SAGD well completion structure and mining method |
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Effective date of registration: 20210121 Address after: 100007 Oil Mansion, 9 North Avenue, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Chuanqing Drilling Engineering Co.,Ltd. Address before: 710016 Changqing science and technology building, Fengcheng 4th Road, Weiyang District, Xi'an City, Shaanxi Province Patentee before: CNPC CHUANQING DRILLING ENGINEERING COMPANY LIMITED ENGINEERING TECHNOLOGY Research Institute |
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