CN109267963A - A kind of equal hole diameters expansion sleeve blocking method - Google Patents
A kind of equal hole diameters expansion sleeve blocking method Download PDFInfo
- Publication number
- CN109267963A CN109267963A CN201810962527.0A CN201810962527A CN109267963A CN 109267963 A CN109267963 A CN 109267963A CN 201810962527 A CN201810962527 A CN 201810962527A CN 109267963 A CN109267963 A CN 109267963A
- Authority
- CN
- China
- Prior art keywords
- expansion
- variable diameter
- level
- tubing string
- expansion cone
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- 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
- E21B29/00—Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
-
- 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
- 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
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
Abstract
The present invention relates to the plugging operations technical field on multiple pressure regime stratum and severe mud losses stratum, in particular to a kind of equal hole diameters expansion sleeve blocking method.The method steps are as follows: one, in tripping in upper layer casing, the casing shoe with bell-mouth structure of air is lowered into design position with upper layer casing in advance, the bell-mouth structure of air internal diameter of the casing shoe lower end is greater than upper layer casing inner diameter, after cementing the well according to detail design, lower drill bit drills casing shoe and forms overlap joint horn mouth I；Two, it bores after meeting bad ground generation leakage, tripping in reaming tool carries out sizing reaming to institute's drilling well section.The present invention realizes and does not lose borehole size, does not change well depth structure, guarantees wellbore integrity, avoids leakage risk, effectively improves bit speed, shortens drilling period.
Description
Technical field:
The present invention relates to the plugging operations technical fields on multiple pressure regime stratum and severe mud losses stratum, in particular to a kind of
Equal hole diameters expansion sleeve blocking method.
Background technique:
Petroleum exploration and development gradually develops to deep layer, ultra deep and bad ground at this stage, inevitable in drilling process
Meeting encounter circulation problems, for different leakage types, take different leaking-stopping measures.For multiple pressure regime and pernicious leakage
Lost territory layer, waits hole diameters Solid expandable sleeve plugging technology that can preferably solve this problem.The technology is by solid expansion pipe
Expansion tube is radially expanded by the leakage well section of tripping in reaming using expansion tool, it is swollen after sleeve outer wall be close to stratum, shape
At one layer " artificial borehole wall ", the purpose that drop ply blocks is realized.Furthermore the casing inner diameter after expanding is identical as former borehole size, not shadow
Ring the subsequent normal drilling well of full size drill bit.
However the existing expansion tube closure for waiting hole diameters expansion sleeve leak-stopping technique to have the disadvantage that (1) tripping in is
Naked eye misses well section, under the premise of guaranteeing not lose borehole diameter, cannot be hanging on the casing of upper layer, when continuing drilling, on
Well section between layer casing and expansion sleeve interval isolation still has the risk of leakage, and wellbore integrity cannot be guaranteed；(2) using swollen
After expansion set pipe successfully blocks current leakage section, continue to creep into, if there is new circulation problems, the expansion tube of tripping in again
New drop ply can only be blocked, under the premise of guaranteeing not lose borehole diameter, cannot be overlapped with the expansion tube of tripping in for the first time,
Wellbore integrity cannot be guaranteed.
Summary of the invention:
The technical problem to be solved in the present invention is to provide a kind of equal hole diameters expansion sleeve blocking methods, and the arrangement achieves not
Borehole size is lost, does not change well depth structure, guarantees wellbore integrity, leakage risk is avoided, effectively improves bit speed, contract
Short drilling period.It overcomes existing equal hole diameters expansion sleeve leak-stopping technique and is unable to ensure wellbore integrity, there is leakage risk
It is insufficient.
The technical solution used in the present invention is: a kind of equal hole diameters expansion sleeve blocking method, the method steps are as follows:
One, in tripping in upper layer casing, the casing shoe with bell-mouth structure of air is lowered into design with upper layer casing in advance
The bell-mouth structure of air internal diameter of position, the casing shoe lower end is greater than upper layer casing inner diameter, and after cementing the well according to detail design, lower drill bit is bored
Sleeve-penetrating shoe-shaped is at overlap joint horn mouth I；
Two, it bores after meeting bad ground generation leakage, tripping in reaming tool carries out sizing reaming to institute's drilling well section；
Three, the outer tubing string expansion sleeve of tripping in and interior tubing string expansion tool, and it is sent to barefoot interval bottom；Interior tubing string expands work
Tool includes level-one variable diameter expansion cone and second level variable diameter expansion cone, and level-one variable diameter expansion cone is arranged in second level variable diameter expansion cone upper end,
Outer diameter is equal to upper layer casing inner diameter after level-one variable diameter expansion cone expands variable diameter, and outer diameter is greater than after second level variable diameter expansion cone expansion variable diameter
Upper layer casing inner diameter, the variable diameter pressure that second level variable diameter expansion cone needs are greater than the variable diameter pressure that the expansion of level-one variable diameter expansion cone needs
Power；
Four, to the annular injection cementing concrete between the stratum borehole wall and outer tubing string expansion sleeve；
Five, outer tubing string expansion sleeve bottom is anchored on stratum；
Six, inside tubing string expansion tool, which is suppressed, makes level-one variable diameter expansion cone and the completely compound variable diameter of second level variable diameter expansion cone,
Level-one variable diameter expansion cone and the external tubing string expansion sleeve tube expansion of second level variable diameter expansion cone uplink, when interior tubing string expansion tool is gone upward to
After design runlength, pressure release, level-one variable diameter expansion cone and second level variable diameter expansion cone reset, and level-one variable diameter expansion cone and second level variable diameter are swollen
Swollen cone outer diameter reverts to the outer diameter before variable diameter, and outer tubing string expansion sleeve lower end forms overlap joint horn mouth II, the overlap joint horn mouth II
Overlap joint is capable of forming after the outer tubing string expansion sleeve top of secondary tripping in is swollen after internal diameter guarantee expansion operation；
Seven, restore to suppress to make the completely compound variable diameter of level-one variable diameter expansion cone, and second level variable diameter expansion cone is not compound, keeps this
Pressure, level-one variable diameter expansion cone continue the external tubing string expansion sleeve tube expansion of uplink, complete the closure of drop ply；Outer tubing string after tube expansion
It is overlapped at the top of expansion sleeve with upper layer casing overlap joint horn mouth I；
Eight, tube expansion operation terminates, and acts interior tubing string expansion tool；
Nine, the outer tubing string expansion sleeve bottom end member of lower junk mill milling and cement plug；
Ten, lower drill bit continues to creep into, if leakage occurs in drilling process again, repeats the construction of step 2~step 9
Operation.
The outer tubing string expansion sleeve includes expansion tube, be separately positioned on upper cartridge on the outside of expansion tube upper and lower side and
Lower cartridge, the bruising for being connected to expansion tube bottom end are given up assembly, are matched with bruising assembly of giving up and be can be realized bruising
Cementing plug is arranged in bruising and gives up the earth anchor that can be anchored on stratum of assembly lower end, the guide shoe of earth anchor lower end is arranged in；
Said inner tube column expansion tool includes the sealing cup being successively set on drilling rod from top to bottom, the expansion of level-one variable diameter
Cone and second level variable diameter expansion cone, are arranged in the back-off sub of drilling rod bottom end；
The back-off sub assembly that can give up with bruising connect locking, reach setting give up pressure when back-off sub with
Bruising is given up assembly disengagement, the sealing cup can annular space between sealing drilling rod and expansion tube, the drilling rod internal channel can
By back-off sub internal channel, bruising give up assembly inner passage, earth anchor internal channel, on guide shoe outside connected pore channel and expansion tube
It is connected.
The pressure of the compound variable diameter of level-one variable diameter expansion cone is 15-20MPa, the pressure of the compound variable diameter of second level variable diameter expansion cone
Power is 20-25MPa, and interior tubing string expansion tool pressure of giving up is 25MPa.
The beneficial effects of the present invention are: the present invention, which realizes, does not lose borehole size, do not change well depth structure, guarantees pit shaft
Integrality avoids leakage risk, effectively improves bit speed, shortens drilling period.
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 that upper layer lower end forms overlap joint horn mouth I.
Fig. 2 is schematic diagram after leakage stratum reaming.
Fig. 3 is that outer tubing string expansion sleeve and interior tubing string expansion tool are lowered into drop ply position schematic diagram.
Fig. 4 is expansion tube closure drop ply schematic diagram after cementing bruising.
Fig. 5 is the reset of second level variable diameter expansion cone, level-one variable diameter expansion cone tube expansion schematic diagram.
Fig. 6 is that expansion tube closure drop ply finishes schematic diagram.
Fig. 7 is the outer tubing string expansion sleeve bottom end member of milling and cement plug schematic diagram.
Fig. 8 is that expansion tube and upper layer casing successfully overlap schematic diagram.
Specific embodiment:
A kind of equal hole diameters expansion sleeve blocking method, the method steps are as follows:
One, in tripping in upper layer casing, the casing shoe with bell-mouth structure of air is lowered into design with upper layer casing in advance
The bell-mouth structure of air internal diameter of position, the casing shoe lower end is greater than upper layer casing inner diameter, and after cementing the well according to detail design, lower drill bit is bored
Sleeve-penetrating shoe-shaped is at overlap joint horn mouth I 1, as shown in Figure 1；
Two, it bores after meeting bad ground generation leakage, tripping in reaming tool carries out sizing expansion to the non-reaming stratum 2 of institute's drilling well section
Hole, as shown in Figure 2；
Three, the outer tubing string expansion sleeve of tripping in and interior tubing string expansion tool, and it is sent to barefoot interval bottom, as shown in Figure 3；
The outer tubing string expansion sleeve includes expansion tube 6, the upper cartridge being separately positioned on the outside of 6 upper and lower side of expansion tube
5 and lower cartridge 7, the bruising for being connected to 6 bottom end of expansion tube is given up assembly 8, is matched and be can be realized with bruising assembly 8 of giving up
The cementing plug 15 of bruising is arranged in bruising and gives up the earth anchor 9 that can be anchored on stratum of 8 lower end of assembly, is arranged in earth anchor 9
The guide shoe 10 of lower end；
Said inner tube column expansion tool includes that the sealing cup 14 being successively set on drilling rod from top to bottom, level-one variable diameter are swollen
Swollen cone 13 and second level variable diameter expansion cone 12, are arranged in the back-off sub 11 of drilling rod bottom end；Level-one variable diameter expansion cone 13 expands variable diameter
Outer diameter is equal to upper layer casing inner diameter afterwards, and outer diameter is greater than upper layer casing inner diameter after second level variable diameter expansion cone 12 expands variable diameter, and second level becomes
The variable diameter pressure that diameter expansion cone 12 needs is greater than the variable diameter pressure that the expansion of level-one variable diameter expansion cone 13 needs；
The back-off sub 11 assembly 8 that can give up with bruising connect locking, reach setting give up pressure when give up and connect
First 11 give up the disengagement of assembly 8 with bruising, and the sealing cup 14 being capable of annular space, the drilling rod between sealing drilling rod and expansion tube 6
Internal channel can be given up by 11 internal channel of back-off sub, bruising 8 inner passage of assembly, 9 internal channel of earth anchor, be connected on guide shoe 10
It is connected outside duct and expansion tube 6.
The pressure of the compound variable diameter of the level-one variable diameter expansion cone 13 is 15-20MPa, the compound variable diameter of second level variable diameter expansion cone 12
Pressure be 20-25MPa, interior tubing string expansion tool pressure of giving up is 25MPa.
Under it is fashionable outer tubing string expansion sleeve is first seated at well head, the back-off sub 11 of interior tubing string expansion tool is given up with bruising
The connection locking of assembly 8, by drilling rod by outer tubing string expansion sleeve and interior tubing string expansion tool with being sent to after barefoot interval i.e. reaming
4 bottom of layer；
Four, using cementing truck by drilling rod, 11 internal channel of back-off sub, bruising give up 8 inner passage of assembly, in earth anchor 9
Connected pore channel is to the annular injection cementing concrete 16 between the stratum borehole wall and expansion tube 6 on channel, guide shoe 10, after cement has been infused, throws
Cementing plug 15 replaces rubber plug 15 to bruising with clear water and gives up 8 position bruising of assembly；
Five, after 15 normal bruising of cementing plug, the anchor fluke of earth anchor 9 opens, and outer tubing string expansion sleeve bottom is anchored to
On stratum；
Six, sealing cup 14 insulates the annular space between drilling rod and expansion tube 6, and the annular space below of sealing cup 14 is made to become one
A pressure chamber infuses clear water by the inside tubing string expansion tool of drilling rod using cementing truck and suppresses 25MPa, level-one variable diameter expansion cone 13
And the compound variable diameter completely of second level variable diameter expansion cone 12, back-off sub 11 and bruising are given up the disengagement of assembly 8, interior tubing string expansion tool is lost
Hand keeps pressure 25MPa or so, and internal pressure pushes level-one variable diameter expansion cone 13 and 12 uplink tube expansion of second level variable diameter expansion cone,
As shown in Figure 4；Lower cartridge 7 is close to stratum and forms reliable sealing, after interior tubing string expansion tool goes upward to design runlength, lets out
Pressure, level-one variable diameter expansion cone 13 and second level variable diameter expansion cone 12 reset, level-one variable diameter expansion cone 13 and second level variable diameter expansion cone 12
Outer diameter reverts to the outer diameter before variable diameter, and outer tubing string expansion sleeve lower end forms overlap joint horn mouth II, II internal diameter of overlap joint horn mouth
Overlap joint is capable of forming after the outer tubing string expansion sleeve top of secondary tripping in is swollen after Assurance of Size expansion operation；
Seven, ground cement vehicle recovery is suppressed, by pressure control in 15-20MPa, the compound change completely of level-one variable diameter expansion cone 13
Diameter, and second level variable diameter expansion cone 12 is not compound at this pressure, keeps the pressure of 15-20MPa, one-stage expansion cone 13 continues uplink
Tube expansion completes the closure to drop ply 3, as shown in Figure 5；Loudspeaker are overlapped with upper layer casing at the top of outer tubing string expansion sleeve after tube expansion
Mouth I 1 overlaps, and with upper layer casing overlap joint I 1 position of horn mouth due to there is the presence of upper cartridge 5, sealing can at expansion tube 6 top
It is guaranteed by property, the interior latus rectum after expansion tube 6 expands is equal with latus rectum in the casing of upper layer；
Eight, tube expansion operation terminates, and acts interior tubing string expansion tool, as shown in Figure 6；
Nine, lower 17 milling bruising of junk mill is given up assembly 8, earth anchor 9, guide shoe 10 and cement plug, as shown in Figure 7；It expands at this time
Pipe is successfully overlapped with upper layer casing, as shown in Figure 8；
Ten, lower drill bit continues to creep into, if leakage occurs in drilling process again, repeats the construction of step 2~step 9
Operation.
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 (3)
1. a kind of equal hole diameters expansion sleeve blocking method, it is characterised in that: the method steps are as follows:
One, in tripping in upper layer casing, the casing shoe with bell-mouth structure of air is lowered into design position with upper layer casing in advance,
The bell-mouth structure of air internal diameter of the casing shoe lower end is greater than upper layer casing inner diameter, and after cementing the well according to detail design, lower drill bit drills set
Pipe shoe forms overlap joint horn mouth I；
Two, it bores after meeting bad ground generation leakage, tripping in reaming tool carries out sizing reaming to institute's drilling well section；
Three, the outer tubing string expansion sleeve of tripping in and interior tubing string expansion tool, and it is sent to barefoot interval bottom；Interior tubing string expansion tool packet
Level-one variable diameter expansion cone and second level variable diameter expansion cone are included, level-one variable diameter expansion cone is arranged in second level variable diameter expansion cone upper end, level-one
Outer diameter is equal to upper layer casing inner diameter after variable diameter expansion cone expands variable diameter, and outer diameter is greater than upper layer after second level variable diameter expansion cone expands variable diameter
Casing inner diameter, the variable diameter pressure that second level variable diameter expansion cone needs are greater than the variable diameter pressure that the expansion of level-one variable diameter expansion cone needs；
Four, to the annular injection cementing concrete between the stratum borehole wall and outer tubing string expansion sleeve；
Five, outer tubing string expansion sleeve bottom is anchored on stratum；
Six, inside tubing string expansion tool, which is suppressed, makes level-one variable diameter expansion cone and the completely compound variable diameter of second level variable diameter expansion cone, level-one
Variable diameter expansion cone and the external tubing string expansion sleeve tube expansion of second level variable diameter expansion cone uplink, when interior tubing string expansion tool goes upward to design
After stroke, pressure release, level-one variable diameter expansion cone and second level variable diameter expansion cone reset, level-one variable diameter expansion cone and second level variable diameter expansion cone
Outer diameter reverts to the outer diameter before variable diameter, and outer tubing string expansion sleeve lower end forms overlap joint horn mouth II, II internal diameter of overlap joint horn mouth
Overlap joint is capable of forming after the outer tubing string expansion sleeve top of secondary tripping in is swollen after Assurance of Size expansion operation；
Seven, restore to suppress to make the completely compound variable diameter of level-one variable diameter expansion cone, and second level variable diameter expansion cone is not compound, keeps this pressure
Power, level-one variable diameter expansion cone continue the external tubing string expansion sleeve tube expansion of uplink, complete the closure of drop ply；Outer tubing string after tube expansion is swollen
Swollen cannula tip and upper layer casing overlap joint horn mouth I overlap；
Eight, tube expansion operation terminates, and acts interior tubing string expansion tool；
Nine, the outer tubing string expansion sleeve bottom end member of lower junk mill milling and cement plug；
Ten, lower drill bit continues to creep into, if leakage occurs in drilling process again, repeats the construction of step 2~step 9 and makees
Industry.
2. equal hole diameters expansion sleeve blocking method described in accordance with the claim 1, it is characterised in that: the outer tubing string expansion sleeve
Including expansion tube, the upper cartridge and lower cartridge being separately positioned on the outside of expansion tube upper and lower side are connected to expansion tube bottom
The bruising at end is given up assembly, is matched with bruising assembly of giving up and be can be realized the cementing plug of bruising, setting is given up always in bruising
At the earth anchor that can be anchored on stratum of lower end, the guide shoe of earth anchor lower end is set；
Said inner tube column expansion tool include the sealing cup being successively set on drilling rod from top to bottom, level-one variable diameter expansion cone and
Second level variable diameter expansion cone, is arranged in the back-off sub of drilling rod bottom end；
The back-off sub assembly that can give up with bruising connect locking, reach setting give up pressure when back-off sub and bruising
Assembly of giving up disengages, and the sealing cup annular space, the drilling rod internal channel can pass through between sealing drilling rod and expansion tube
Back-off sub internal channel, bruising give up assembly inner passage, earth anchor internal channel, be connected on guide shoe outside connected pore channel and expansion tube
It is logical.
3. equal hole diameters expansion sleeve blocking method according to claim 2, it is characterised in that: the level-one variable diameter expansion cone
The pressure of compound variable diameter is 15-20MPa, and the pressure of the compound variable diameter of second level variable diameter expansion cone is 20-25MPa, and interior tubing string expands work
Having pressure of giving up is 25MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810962527.0A CN109267963A (en) | 2018-08-22 | 2018-08-22 | A kind of equal hole diameters expansion sleeve blocking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810962527.0A CN109267963A (en) | 2018-08-22 | 2018-08-22 | A kind of equal hole diameters expansion sleeve blocking method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109267963A true CN109267963A (en) | 2019-01-25 |
Family
ID=65154245
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810962527.0A Pending CN109267963A (en) | 2018-08-22 | 2018-08-22 | A kind of equal hole diameters expansion sleeve blocking method |
Country Status (1)
| Country | Link |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110439491A (en) * | 2019-08-23 | 2019-11-12 | 华鼎鸿基石油工程技术(北京)有限公司 | Packer expanding expandable casing patching tool |
| WO2021026749A1 (en) * | 2019-08-12 | 2021-02-18 | 屈波 | Compound lining apparatus for pipeline |
| CN112832707A (en) * | 2019-11-22 | 2021-05-25 | 中国石油化工股份有限公司 | Hydraulic expansion type leakage stopping tool and leakage stopping method thereof |
| CN113309487A (en) * | 2021-05-24 | 2021-08-27 | 中煤科工集团西安研究院有限公司 | Recoverable fixed-point grouting device and method for directional long drilling hole in underground coal mine |
| CN114135244A (en) * | 2021-11-30 | 2022-03-04 | 西南石油大学 | Hydraulic variable-level expansion tool for plugging while drilling and process method |
| CN114427366A (en) * | 2020-10-29 | 2022-05-03 | 中国石油化工股份有限公司 | Equal-borehole-diameter well wall repairing device and repairing method |
| CN115126438A (en) * | 2021-03-25 | 2022-09-30 | 中国石油天然气集团有限公司 | Electrodeless variable-diameter leakage blocking device and method thereof |
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| CN115126438A (en) * | 2021-03-25 | 2022-09-30 | 中国石油天然气集团有限公司 | Electrodeless variable-diameter leakage blocking device and method thereof |
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| CN113309487A (en) * | 2021-05-24 | 2021-08-27 | 中煤科工集团西安研究院有限公司 | Recoverable fixed-point grouting device and method for directional long drilling hole in underground coal mine |
| CN114135244A (en) * | 2021-11-30 | 2022-03-04 | 西南石油大学 | Hydraulic variable-level expansion tool for plugging while drilling and process method |
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