CN106761593B - A kind of bad ground pretreating process - Google Patents
A kind of bad ground pretreating process Download PDFInfo
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- CN106761593B CN106761593B CN201611149295.4A CN201611149295A CN106761593B CN 106761593 B CN106761593 B CN 106761593B CN 201611149295 A CN201611149295 A CN 201611149295A CN 106761593 B CN106761593 B CN 106761593B
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- bad ground
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000008569 process Effects 0.000 title claims abstract description 21
- 239000007787 solid Substances 0.000 claims abstract description 36
- 238000005553 drilling Methods 0.000 claims abstract description 22
- 230000000694 effects Effects 0.000 claims abstract description 7
- 238000004513 sizing Methods 0.000 claims abstract description 5
- 238000012545 processing Methods 0.000 claims abstract description 3
- 210000003128 head Anatomy 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 5
- 238000004873 anchoring Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 8
- 230000007246 mechanism Effects 0.000 abstract description 5
- 241001074085 Scophthalmus aquosus Species 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 206010008469 Chest discomfort Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000008961 swelling Effects 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/10—Setting of casings, screens, liners or the like in wells
- E21B43/103—Setting of casings, screens, liners or the like in wells of expandable casings, screens, liners, or the like
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/10—Setting of casings, screens, liners or the like in wells
- E21B43/103—Setting of casings, screens, liners or the like in wells of expandable casings, screens, liners, or the like
- E21B43/105—Expanding tools specially adapted therefor
-
- 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
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
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- 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)
- Earth Drilling (AREA)
Abstract
The present invention relates to expansion tubes to block stratum technical field, in particular to a kind of bad ground pretreating process.The processing step is as follows: one, bore meet bad ground after, first start boring tool of following drilling to bad ground and its it is 3~5 meters upper and lower in the range of carry out sizing reaming hole；Two, first time expansion process: tripping in solid expansion pipe makes the both ends of solid expansion pipe be located at the position of 3~5 meters of bad ground or more, in bad ground position tripping in expansion system.The present invention realizes expansion tube and can be anchored on the borehole wall, expansion tube body and screw thread do not need to bear high pressure, it is equipped with positioning mechanism between expansion tool and expansion tube, avoids expansion tube from sliding, expansive force is strong, expansion effect is good, bad ground can effectively be blocked, not influence subsequent job, it is stifled not need brill mill bottom, construction risk and difficulty of construction are reduced, construction cost is reduced.
Description
Technical field:
The present invention relates to expansion tubes to block stratum technical field, in particular to a kind of bad ground pretreating process.
Background technique:
As petroleum exploration and development constantly develops to deep layer, ultra deep and bad ground, the leakage encountered is bored in drilling process
Lose layer, collapse layer and high pressure zone it is more and more.In drilling process, situations such as encountering severe well leakage, cave-in, can not be into
Row is effectively treated, and brings drilling period extension to drilling team, increased costs, cannot even bore serious consequence up to target zone.For this purpose,
Research new technology pre-processes bad ground, reduces drilling cost, promotes exploration and development progress, has highly important meaning
Justice.
Equal hole diameters bad ground pretreating process technology is exactly the new skill that fast development is got up in this context
Art.The technology is that expansion sleeve is lowered into the bad ground well section for having carried out sizing reaming, makes expansion tube by expansion tool
Radial plastic deformation occurs, and is tightly attached on the borehole wall, forms one layer " artificial borehole wall " and blocks bad ground, led after preventing it from deteriorating
Cause the drilling failures such as severe mud losses, cave-in and bit freezing.Equal hole diameters bad ground pretreating process is not reducing borehole diameter
In the case where may be implemented effectively to block, and have the characteristics that high reliablity, at low cost, the period is short, it is few to employ equipment, recognized
To be the pretreated core technology of the bad grounds such as lost-circulation zone, the layer that collapses, high pressure zone.
However existing expansion tube blocks ground method and has the disadvantage that in 1, expansion operation process, by bottom it is stifled with
High pressure chest provides expansion power between expansion cone, is limited by expansion tube body and screw thread bearing capacity, and the expansive force provided is limited,
It is difficult to be fitted tightly over expansion tube on the borehole wall, plugging effect is undesirable；2, positioning mechanism is not set between expansion cone and expansion tube,
Opposite slide may occur when expanding operation；3, it is sent into drilling tool without anchor mechanism between expansion tube and the borehole wall and is easy to expansion
Pipe slides, and is not only that expansion positioning in next step makes troubles, or even packing element is caused to be seriously worn, the complicated layer of closure is not achieved
The purpose of position.
Summary of the invention:
The technical problem to be solved in the present invention is to provide a kind of bad ground pretreating process, which realizes expansion tube
It can be anchored on the borehole wall, expand tube body and screw thread does not need to bear high pressure, positioning is equipped between expansion tool and expansion tube
Mechanism avoids expansion tube from sliding, and expansive force is strong, and expansion effect is good, can effectively be blocked, not influenced to bad ground
Subsequent job does not need brill mill bottom and blocks up, reduces construction risk and difficulty of construction, reduce construction cost.Overcome existing expansion tube
Closure ground method expansive force is limited, and expansion tube easily slides, and packing element is caused to be seriously worn, and plugging effect is undesirable not
Foot.
The technical solution used in the present invention is: a kind of bad ground pretreating process, the processing step are as follows:
One, after boring chance bad ground, first start boring tool of following drilling to bad ground and its upper and lower 3~5 meters of range
Interior progress sizing reaming hole；
Two, first time expansion process: tripping in solid expansion pipe makes the both ends of solid expansion pipe be located at bad ground or more 3
~5 meters of position, in bad ground position tripping in expansion system；Expansion system includes central tube, and central tube upper end and feeding are bored
Tool is connected, and central tube lower end is connected with piston stayed mast, and piston stayed mast upper end connects lifting force piston, piston stayed mast
Lower end passes through tubing string internal anchor and penetrates in cone seat tube body, and tubing string internal anchor upper end connects lower thrust piston, lifting force
Recirculation hole is provided on piston stayed mast between piston and lower thrust piston, piston stayed mast lower part is set with one-stage expansion cone,
Piston stayed mast bottom end inner wall is equipped with ball seat, and compound expansion cone is set on cone seat tube body；Ball sealer is put into, ball sealer is setting
It on the ball seat of piston stayed mast, is suppressed by central tube, drilling fluid enters lifting force by the recirculation hole on piston stayed mast
Pressure chamber between piston and lower thrust piston, and then so that tubing string internal anchor is anchored to entity into tubing string internal anchor
It expands on inside pipe wall, hydraulic drive lifting force piston stroking upward bores uplink, one-stage expansion with piston stayed mast, one-stage expansion in turn
Cone is radially expanded solid expansion pipe lower end, so that the naked eye anchor of triggering entity expansion tube lower end outside expands anchoring
After on the borehole wall, waiting naked eyes anchor to complete anchoring, piston stayed mast uplink is set to drive one-stage expansion by well head lifting
Uplink is bored, piston stayed mast bottom end drives cone seat tube body uplink and then compound expansion is driven to bore uplink, to make solid expansion pipe
It expands, after the completion of Solid expandable tube swelling, proposes expansion system；
Three, second of expansion process: tripping in hydraulic reducing expansion tool makes the cone portion quartile of hydraulic reducing expansion tool
It is suppressed after putting into ball to hydraulic reducing expansion tool bottom ball seat on ground in solid expansion pipe lower end, hydraulic variable diameter expands work
The variable diameter expansion cone of tool is closed to design size, after hydraulic reducing expansion tool is closed completely, lifts from well head and is sent into drilling tool,
Second is carried out to solid expansion pipe to expand, is tightly attached to solid expansion pipe on the borehole wall, is vulcanized outside solid expansion pipe upper and lower side
The upper cartridge of side and lower cartridge automatic expansion play the role of insulating bad ground, when solid expansion pipe is all swollen
It is swollen it is complete after, carry out pressure release, hydraulic reducing expansion tool outer diameter be contracted to it is original under fashionable size, by be sent into drilling tool rise it is hydraulic out
Reducing expansion tool.
The beneficial effects of the present invention are: the present invention, which realizes expansion tube, to be anchored on the borehole wall, tube body and spiral shell are expanded
Line does not need to bear high pressure, and positioning mechanism is equipped between expansion tool and expansion tube, avoids expansion tube from sliding, expansive force
By force, expansion effect is good, can effectively be blocked to bad ground, not influence subsequent job, does not need brill mill bottom and blocks up, reduction is applied
Work risk and difficulty of construction reduce construction cost.
Detailed description of the invention:
The present invention will be further described in detail with reference to the accompanying drawings and detailed description.
Fig. 1 is the structural schematic diagram of expansion system.
Fig. 2 is that naked eye anchor is anchored schematic diagram.
Fig. 3 is solid expansion pipe expansion schematic diagram for the first time.
Fig. 4 is that expansion system proposes schematic diagram.
Fig. 5 is hydraulic reducing expansion tool tripping in schematic diagram.
Fig. 6 is that hydraulic reducing expansion tool is closed schematic diagram.
Fig. 7 is that solid expansion pipe expands schematic diagram for the second time.
Fig. 8 is that hydraulic reducing expansion tool proposes schematic diagram.
Specific embodiment:
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, a kind of bad ground pretreating process, technique step
It is rapid as follows:
One, after boring chance bad ground, first start boring tool of following drilling to bad ground and its upper and lower 3~5 meters of range
Interior progress sizing reaming hole；
Two, first time expansion process: tripping in solid expansion pipe 8 makes the both ends of solid expansion pipe 8 be located at bad ground or more
3~5 meters of position, in bad ground position tripping in expansion system；Expansion system includes central tube 7,7 upper end of central tube and feeding
Drilling tool 10 is connected, and 7 lower end of central tube is connected with piston stayed mast 13, and 13 upper end of piston stayed mast connects lifting force piston 6,
13 lower end of piston stayed mast passes through tubing string internal anchor 5 and penetrates in cone seat tube body 12, under the connection of 5 upper end of tubing string internal anchor
Thrust piston 14 is provided with recirculation hole, lifting force piston on the piston stayed mast 13 between lifting force piston 6 and lower thrust piston 14
Pressure chamber is formed between 6 and lower thrust piston 14,5 inside of tubing string internal anchor is connected with pressure chamber, piston stayed mast 13
Lower part is set with one-stage expansion cone 2, and 13 bottom end inner wall of piston stayed mast is equipped with ball seat, and it is swollen to be set with second level on cone seat tube body 12
Swollen cone 1；Ball sealer is put into, sealed ball seat is enclosed on the ball seat of piston stayed mast 13, suppresses by central tube 7, drilling fluid passes through
Recirculation hole on piston stayed mast 13 enters the pressure chamber between lifting force piston 6 and lower thrust piston 14, and then enters tubing string
Internal anchor 5 is anchored to tubing string internal anchor 5 on 8 inner wall of solid expansion pipe, advances on hydraulic drive lifting force piston 6
And 2 uplinks are bored with piston stayed mast 13, one-stage expansion, one-stage expansion cone 2 is radially expanded 8 lower end of solid expansion pipe,
To which the expansion of naked eye anchor 3 of 8 lower end outside of triggering entity expansion tube is anchored on the borehole wall, naked eyes anchor 3 is waited to complete anchor
After fixed, make 13 uplink of piston stayed mast that one-stage expansion be driven to bore 2 uplinks, 13 bottom end band of piston stayed mast by well head lifting
12 uplink of mantle seat pipe body and then drive compound expansion 1 uplink of cone, so that solid expansion pipe 8 is expanded, solid expansion pipe 8
After the completion of expansion, expansion system is proposed；
Three, second of expansion process: tripping in hydraulic reducing expansion tool 11 makes the cone portion of hydraulic reducing expansion tool 11
Quartile is suppressed, hydraulic change in 8 lower end of solid expansion pipe after putting into ball to 11 bottom ball seat of hydraulic reducing expansion tool on ground
The variable diameter expansion cone of diameter expansion tool 11 is closed to design size, after hydraulic reducing expansion tool 11 is closed completely, from well head
Drilling tool 10 is sent into lifting, is carried out second to solid expansion pipe 8 and is expanded, be tightly attached to solid expansion pipe 8 on the borehole wall, vulcanizes in reality
Upper cartridge 9 and lower 4 automatic expansion of cartridge on the outside of 8 upper and lower side of body expansion tube play the role of insulating bad ground,
After solid expansion pipe 8 has all expanded, pressure release is carried out, 11 outer diameter of hydraulic reducing expansion tool is fashionable big under being contracted to originally
It is small, hydraulic reducing expansion tool 11 is played out by being sent into drilling tool 10.
It is understood that being merely to illustrate the present invention above with respect to specific descriptions of the invention and being not limited to this
Technical solution described in inventive embodiments, those skilled in the art should understand that, still the present invention can be carried out
Modification or equivalent replacement, to reach identical technical effect；As long as meet use needs, all protection scope of the present invention it
It is interior.
Claims (1)
1. a kind of bad ground pretreating process, it is characterised in that: the processing step is as follows:
One, bore meet bad ground after, first start boring tool of following drilling to bad ground and its it is 3~5 meters upper and lower in the range of into
Row sizing reaming hole；
Two, first time expansion process: tripping in solid expansion pipe (8) makes the both ends of solid expansion pipe (8) be located at bad ground or more
3~5 meters of position, in bad ground position tripping in expansion system；Expansion system includes central tube (7), central tube (7) upper end with
It is sent into drilling tool (10) to be connected, central tube (7) lower end is connected with piston stayed mast (13), the connection of piston stayed mast (13) upper end
Lifting force piston (6), piston stayed mast (13) lower end pass through tubing string internal anchor (5) and penetrate in cone seat tube body (12), tubing string
Internal anchor (5) upper end connects lower thrust piston (14), and the piston between lifting force piston (6) and lower thrust piston (14) is drawn
Recirculation hole is provided on power bar (13), piston stayed mast (13) lower part is set with one-stage expansion cone (2), piston stayed mast (13) bottom end
Inner wall is equipped with ball seat, and compound expansion cone (1) is set on cone seat tube body (12)；Ball sealer is put into, sealed ball seat is enclosed in piston
It on the ball seat of stayed mast (13), is suppressed by central tube (7), drilling fluid is entered upper by the recirculation hole on piston stayed mast (13)
Pressure chamber between thrust piston (6) and lower thrust piston (14), and then make anchor inside tubing string into tubing string internal anchor (5)
Determine device (5) to be anchored on solid expansion pipe (8) inner wall, hydraulic drive lifting force piston (6) uplink is in turn with piston stayed mast
(13), one-stage expansion bores (2) uplink, and one-stage expansion cone (2) is radially expanded solid expansion pipe (8) lower end, to trigger
Naked eye anchor (3) expansion of solid expansion pipe (8) lower end outside is anchored on the borehole wall, and naked eyes anchor (3) is waited to complete anchoring
Afterwards, make piston stayed mast (13) uplink that one-stage expansion be driven to bore (2) uplink, piston stayed mast (13) bottom by well head lifting
End drives cone seat tube body (12) uplink and then compound expansion is driven to bore (1) uplink, so that solid expansion pipe (8) is expanded,
After the completion of solid expansion pipe (8) expansion, expansion system is proposed；
Three, second of expansion process: tripping in hydraulic reducing expansion tool (11) makes the cone portion of hydraulic reducing expansion tool (11)
Quartile is suppressed, liquid in solid expansion pipe (8) lower end after putting into ball to hydraulic reducing expansion tool (11) bottom ball seat on ground
The variable diameter expansion cone of pressure reducing expansion tool (11) is closed to design size, is closed completely to hydraulic reducing expansion tool (11)
Afterwards, it is lifted from well head and is sent into drilling tool (10), second is carried out to solid expansion pipe (8) and is expanded, solid expansion pipe (8) is tightly attached to
On the borehole wall, vulcanize the upper cartridge (9) and lower cartridge (4) automatic expansion on the outside of solid expansion pipe (8) upper and lower side, rises
Pressure release, hydraulic reducing expansion tool are carried out after solid expansion pipe (8) has all expanded to the effect of packing bad ground
(11) fashionable size under outer diameter is contracted to originally acts hydraulic reducing expansion tool (11) by being sent into drilling tool (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611149295.4A CN106761593B (en) | 2016-12-14 | 2016-12-14 | A kind of bad ground pretreating process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611149295.4A CN106761593B (en) | 2016-12-14 | 2016-12-14 | A kind of bad ground pretreating process |
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| Publication Number | Publication Date |
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| CN106761593A CN106761593A (en) | 2017-05-31 |
| CN106761593B true CN106761593B (en) | 2019-03-15 |
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| CN201611149295.4A Active CN106761593B (en) | 2016-12-14 | 2016-12-14 | A kind of bad ground pretreating process |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107246249B (en) * | 2017-08-07 | 2023-05-26 | 南充西南石油大学设计研究院有限责任公司 | Cage type well drilling plugging device and well drilling plugging method |
| CN108119069B (en) * | 2017-12-21 | 2023-12-26 | 中国石油天然气集团有限公司 | Device for lowering tubular column in open hole system of expansion pipe |
| CN109267963A (en) * | 2018-08-22 | 2019-01-25 | 中国石油集团长城钻探工程有限公司 | A kind of equal hole diameters expansion sleeve blocking method |
| CN109667565B (en) * | 2019-02-01 | 2021-09-14 | 中国地质科学院勘探技术研究所 | Bare hole anchoring device and process method |
| CN110173230A (en) * | 2019-06-06 | 2019-08-27 | 安东柏林石油科技（北京）有限公司 | Prevent artificial borehole wall, forming method and the completion structure of shale layer mud output or channelling |
| CN110805409A (en) * | 2019-07-12 | 2020-02-18 | 大港油田集团有限责任公司 | Expansion pipe plugging method based on repeated fracturing cased well |
| CN112878957B (en) * | 2021-03-15 | 2022-10-25 | 西南石油大学 | Well cementation method and tool for enhancing shearing performance of stratum slippage section casing |
| CN114135244B (en) * | 2021-11-30 | 2023-05-26 | 西南石油大学 | Hydraulic variable-stage expansion tool for plugging while drilling |
| CN117552738B (en) * | 2024-01-09 | 2024-03-12 | 易盘达石油科技有限公司 | Oil well casing repairing tubular column and construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9702229B2 (en) * | 2012-08-27 | 2017-07-11 | Saudi Arabian Oil Company | Expandable liner hanger and method of use |
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- 2016-12-14 CN CN201611149295.4A patent/CN106761593B/en active Active
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|---|---|---|---|---|
| CN201567992U (en) * | 2009-12-16 | 2010-09-01 | 中国石油天然气集团公司 | Expansion tool for equal diameter drill completion |
| CN103348095A (en) * | 2011-02-02 | 2013-10-09 | 国际壳牌研究有限公司 | System for lining wellbore |
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| CN106761593A (en) | 2017-05-31 |
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Effective date of registration: 20201022 Address after: No. 6, liupukang, Xicheng District, Beijing 100120 Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: China National Petroleum Corporation Great Wall Drilling Engineering Co.,Ltd. Address before: 124010 Xinglongtai, Liaoning Province, oil street, No. 96, No. Patentee before: China National Petroleum Corporation Great Wall Drilling Engineering Co.,Ltd. |