CN106223917A - A kind of side tracked slim hole layered fracturing pipe string and method - Google Patents

A kind of side tracked slim hole layered fracturing pipe string and method Download PDF

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Publication number
CN106223917A
CN106223917A CN201610616506.4A CN201610616506A CN106223917A CN 106223917 A CN106223917 A CN 106223917A CN 201610616506 A CN201610616506 A CN 201610616506A CN 106223917 A CN106223917 A CN 106223917A
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China
Prior art keywords
pipe
hole
reservoir
pressure break
tail pipe
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Granted
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CN201610616506.4A
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Chinese (zh)
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CN106223917B (en
Inventor
宋振云
张承武
王兴建
吴增智
李志航
王惠生
王玉功
李雪
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China National Petroleum Corp
CNPC Chuanqing Drilling Engineering Co Ltd
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Engineering Technology Research Institute of CNPC Chuanqing Drilling Engineering Co ltd
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Priority to CN201610616506.4A priority Critical patent/CN106223917B/en
Publication of CN106223917A publication Critical patent/CN106223917A/en
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Publication of CN106223917B publication Critical patent/CN106223917B/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/25Methods for stimulating production
    • E21B43/26Methods for stimulating production by forming crevices or fractures
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B23/00Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B29/00Cutting 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
    • E21B29/06Cutting windows, e.g. directional window cutters for whipstock operations
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00Sealing or packing boreholes or wells
    • E21B33/10Sealing or packing boreholes or wells in the borehole
    • E21B33/12Packers; Plugs
    • E21B33/127Packers; Plugs with inflatable sleeve
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00Sealing or packing boreholes or wells
    • E21B33/10Sealing or packing boreholes or wells in the borehole
    • E21B33/13Methods or devices for cementing, for plugging holes, crevices, or the like

Abstract

The invention provides a kind of side tracked slim hole layered fracturing pipe string, including sleeve pipe, the first oil pipe being sequentially connected with from top to bottom in being located at sleeve pipe, tubing anchor, pressure break plug, and tail pipe column, having flank hole, tail pipe column upper end to be connected with pressure break plug on sleeve pipe, lower end passes flank hole;Tail pipe column is made up of the hanger being sequentially connected with from top to bottom, the second oil pipe, ball seat, the 3rd oil pipe, solvable eye pipe, the 4th oil pipe, tail pipe footwear, and hanger is connected with pressure break plug.Present invention also offers fracturing process, need not down fracturing tool, both huge discharge pressing crack construction requirement had been met, evade again the risk of instrument under lower going-into-well, eliminate the perforating job of lower reservoir simultaneously, relative to well cementation sliding sleeve separate stratum fracfturing method, evade the risk that sliding sleeve is not opened, and filled up the tail pipe column of lower internal diameter 76mm in the slim-hole of internal diameter 118mm the blank of the separate stratum fracfturing technology of well cementing of cement.

Description

A kind of side tracked slim hole layered fracturing pipe string and method
Technical field
The invention belongs to Oil/gas Well separate stratum fracfturing technical field, be specifically related to a kind of side tracked slim hole layered fracturing pipe string and Method.
Background technology
At present, domestic and international each elephant enters mid-later development phase mostly, and oil gas well capacity is decayed quickly, when yield is too low Time the most no longer there is extraction value.In order to cost-effective, in old well, side tracked slim hole technology is developed rapidly, especially Being offshore platform and oil field, mountain region, old street district not only avoid costly well site construction, it is also possible to reduces pipeline network construction And environmental pollution, this has more important meaning to the current oil and gas enterprise being the theme with energy-conserving and environment-protective.For larger-size Former well, side-tracked hole 10 size is the biggest, and its layering or staged fracturing Technical comparing are ripe.But it is smaller former for size Well, such as, for the 5 cun of half former well of aperture Φ 124mm, can only go out the slim-hole of aperture Φ 118mm by sidetracking.For oil well Side tracked slim hole, typically takes the completion mode of drilling liner cementing, general in the side tracked slim hole of Φ 118mm at present under enter 3 cun The tail pipe (internal diameter Φ 76mm) of half.At present the side tracked slim hole of drilling liner cementing can only monolayer pressure break, there is no the separate stratum fracfturing of maturation Method.Existing patent CN201020275492.2(slim hole sidetracking well clamp sealing fracturing string) describe employing Φ 70mm envelope Carry out monolayer pressure break every device, have not seen actual application.
For the side tracked slim hole of the drilling liner cementing of internal diameter Φ 76mm, in tail pipe under to enter separate stratum fracfturing instrument be unrealistic , one is not have the least separate stratum fracfturing instrument (less than Φ 70mm), even if two is to have small size instrument, enters under tail pipe is interior Fracturing string caliber is the least, and pressure break infusion frictional resistance is too big, and infusion discharge capacity is the least, does not far reach pressure break requirement.Another kind of slim-hole The possible method of separate stratum fracfturing is water-jet separate stratum fracfturing, takes oil jacket can properly increase pressure break discharge capacity with the mode of note, But the minimum outer diameter of ejector is Φ 80mm at present, does not see the application report of the following ejector of Φ 70mm.Also have a kind of little The possible method of well separate stratum fracfturing is to use well cementation sliding sleeve to carry out separate stratum fracfturing, and the method crosses several mouthfuls in conventional well intra-ocular applications Well, but fault rate is the highest, and for the well cementation sliding sleeve separate stratum fracfturing of side tracked slim hole, fault rate may be higher, currently without seeing On-the-spot application.Other is all is the non-demixing technology being effectively isolated in slim-hole separate stratum fracfturing methods such as current limliting method, the most stifled methods, is layered Unreliable, fracturing reform is the most thorough.
Summary of the invention
It is an object of the invention to overcome the problems referred to above of prior art, it is achieved in tail pipe not fracturing instrument can effectively every From slim-hole demixing technology.
To this end, the invention provides a kind of side tracked slim hole layered fracturing pipe string, including sleeve pipe, it is located at sleeve pipe interior from up to Under be sequentially connected with the first oil pipe, tubing anchor, pressure break plug, and tail pipe column, described sleeve pipe has flank hole, described tail pipe Post upper end is connected with pressure break plug, and lower end passes flank hole;
Described tail pipe column by the hanger being sequentially connected with from top to bottom, the second oil pipe, ball seat, the 3rd oil pipe, solvable eye pipe, the 4th Oil pipe, tail pipe footwear form, and described hanger is connected with pressure break plug.
Described solvable eye pipe includes that body, described body are provided with multiple radial hole, is equipped with sealing in each radial hole Circle, solvable plug, nut, described nut is threadeded with body, and sealing ring is pressed on the radial direction of body by solvable plug In hole on step.
Described pressure break plug is compression packer, and this pressure break plug is inserted in the stepped hole of hanger.
Described body outer surface has longitudinal guiding gutter.
Longitudinally swell at each radial hole.
Present invention also offers a kind of side tracked slim hole separate stratum fracfturing method, inside former well, get out side-tracked hole, will Enter under tail pipe column in side-tracked hole, tail pipe column is cemented the well, after well cementation, open the pressure break passage of lower reservoir, tail pipe column and well head Tool string carries out the pressing crack construction of lower reservoir after connecting;To upper reservoir perforation, isolate with lower reservoir afterwards, upper reservoir is pressed Split construction.
A kind of side tracked slim hole separate stratum fracfturing method, gets out side-tracked hole inside former well, enters sidetracking by under tail pipe column In well, tail pipe column is cemented the well by cement, and well cementation is replaced when replacing cement into one section of lytic agent, and lytic agent is for being positioned at lower reservoir Solvable eye pipe at, after theing cement solidifies, the solvable plug of solvable eye pipe is completely dissolved, and opens the pressure break passage of lower reservoir, afterwards The first oil pipe in sleeve pipe, tubing anchor, pressure break plug are connected with tail pipe column upper end after being sequentially connected with, and the pressure break carrying out lower reservoir is executed Work;
Lower entrance aperture rifle, to the upper reservoir position of tail pipe column, to upper reservoir perforation, forms perforation holes on tail pipe column, plays outgoing Hole rifle, puts into pressure break ball, and pressure break ball is located on ball seat, the lower reservoir isolation with having pressed off, and upper reservoir is carried out pressure break and executes Work.
A kind of side tracked slim hole separate stratum fracfturing method, specifically comprises the following steps that
Step 1) in sleeve pipe enter whipstock, and sit the inwall being stuck in sleeve pipe, by the guiding of whipstock, sleeve pipe carried out side Windowing to boring, sidetracking goes out side-tracked hole;
Step 2) send into by hanger, the second oil pipe, ball seat, the 3rd oil pipe, solvable eye pipe, the 4th oil pipe, tail pipe footwear with drilling rod Be sequentially connected with the tail pipe column of composition, under in the well of side, infusion cement in drilling rod, cement passes through tail pipe column, from tail pipe column and Return to hanger on the annular space that side-tracked hole is constituted, then in drilling rod and tail pipe column, cast plug replacement cement, add afterwards Entering at lytic agent extremely solvable eye pipe, plug arrives tail pipe footwear and builds the pressure at tail pipe footwear, and hanger sets in sleeve pipe, and cement coagulates Gu, the solvable plug of solvable eye pipe is dissolved, and opens the pressure break passage of lower reservoir;
Step 3) trips out drilling rod, in sleeve pipe under enter and be sequentially connected with from top to bottom formed by the first oil pipe, tubing anchor, pressure break plug Tubing string, under gravity, pressure break plug sets in the stepped hole of hanger, and lower reservoir is carried out pressing crack construction;
Under step 4), entrance aperture rifle is to the position of the upper reservoir of tail pipe column, and the tail pipe column at upper reservoir is carried out cable perforation, Perforation holes is formed on tail pipe column;
Step 5) trips out perforating gun, puts into pressure break ball, and pressure break ball is located on ball seat, the lower reservoir that closure has pressed off below, Upper reservoir is carried out pressing crack construction;Separate stratum fracfturing is complete.
The invention has the beneficial effects as follows:
1, the side tracked slim hole that the present invention uses solvable eye pipe to be drilling liner cementing provides the reliable separate stratum fracfturing side of a kind of isolation Method, has particularly filled up tail pipe the separate stratum fracfturing technology of well cementing of cement of lower internal diameter 76mm in the slim-hole of internal diameter 118mm Blank.
2, the side tracked slim hole separate stratum fracfturing method that the present invention proposes need not down fracturing tool, has both met huge discharge pressure Split construction requirement, evade again the risk of instrument under lower going-into-well.
3, the present invention utilizes the cementing well operation temporarily blocking functional realiey tail pipe of solvable eye pipe, utilizes solvable eye The timed dissolution function of pipe opens lower floor's pressure break passage, eliminates the perforating job of lower reservoir, relative to well cementation sliding sleeve layering pressure Cracking method, has evaded the risk that sliding sleeve is not opened.
4, pressure break plug of the present invention uses compression packer structure, and the big expansion utilizing compression type glue barrel is forthright Can seal bigger annular clearance, and bearing capacity is higher;The tieback plug of conventional hanger uses one group of sealing ring The magnitude of interference seal, the annular clearance of sealing must be the least, and bearing capacity is relatively low, it is impossible to meets pressure break requirement.
It is described in further details below in conjunction with accompanying drawing.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention;
Fig. 2 is the structural representation of solvable eye pipe.
In figure: 1, the first oil pipe;2, sleeve pipe;3, the second oil pipe;4, whipstock;5, upper reservoir;6, lower reservoir;7, oil pipe Anchor;8, pressure break plug;9, hanger;10, side-tracked hole;11, cement;12, perforation holes;13, pressure break ball;14, ball seat;15、 3rd oil pipe;16, solvable eye pipe;17, the 4th oil pipe;18, tail pipe footwear;19, body;20, nut;21, solvable plug;22, close Seal.
Detailed description of the invention
Embodiment 1:
Present embodiments provide a kind of side tracked slim hole layered fracturing pipe string, including sleeve pipe 2, depend on from top to bottom in being located at sleeve pipe 2 First oil pipe 1 of secondary connection, tubing anchor 7, pressure break plug 8, and tail pipe column, described sleeve pipe 2 has flank hole, described tail pipe Post upper end is connected with pressure break plug 8, and lower end passes flank hole;
Described tail pipe column is by hanger the 9, second oil pipe 3 being sequentially connected with from top to bottom, ball seat the 14, the 3rd oil pipe 15, solvable eye Pipe the 16, the 4th oil pipe 17, tail pipe footwear 18 form, and described hanger 9 is connected with pressure break plug 8.
The present embodiment work process is as a example by the slim-hole getting out Φ 118mm inside the former well of Φ 124mm: such as Fig. 1 Shown in, in sleeve pipe 2 under enter whipstock 4, whipstock 4 is engaging in sleeve pipe 2 inwall, is holed by whipstock 4 and open on sleeve pipe 2 Window, gets out the side-tracked hole 10 of 118mm.Using Drill-pipe conveyed tail pipe column, be lowered in side-tracked hole 10, hanger 9 is sat and is hung over set In pipe 2.By driller's infusion cement 11, cementing the well tail pipe column, replace into one section of lytic agent when replacing cement 11, lytic agent replaces To solvable eye pipe 16.Wait solvable eye pipe 16 when cement 11 solidifies to be dissolved, open the pressure break passage of lower reservoir 6.At sleeve pipe 2 Enter the tubing string being made up of successively the first oil pipe 1, tubing anchor 7, pressure break plug 8 under Nei, be inserted in the stepped hole of hanger 9, weight The lower packing element compressing pressure break plug 8 of effect, pressure break plug 8 sets in the stepped hole of hanger 9.Tubing anchor 7 is engaging in sleeve pipe 2 In, maintain pressure break plug 8 sets compression stress;Carry out the pressing crack construction of lower reservoir 6.
In tubing string, entrance aperture rifle is to the position of the upper reservoir 5 of tail pipe column, and the tail pipe column at upper reservoir 5 is carried out cable Perforation, forms perforation holes 12 on tail pipe column.Trip out perforating gun, in fracturing string and tail pipe column, put into pressure break ball 13, pressure Blastomere 13 is located on ball seat 14, the lower reservoir 6 that isolation has pressed off below, and upper reservoir 5 is carried out pressing crack construction.Thus realize Sidetracking 118mm slim-hole drilling liner cementing separate stratum fracfturing.
Embodiment 2:
On the basis of embodiment 1, present embodiments provide a kind of side tracked slim hole layered fracturing pipe string, described solvable eye pipe 16 Including body 19, described body 19 is provided with multiple radial hole, be equipped with in each radial hole sealing ring 22, solvable plug 21, Nut 20, described nut 20 is threadeded with body 19, and sealing ring 22 is pressed on the radial direction of body 19 by solvable plug 21 In hole on step.As shown in Figure 2.
In the present embodiment, pressure break plug 8 is compression packer, and this pressure break plug 8 is inserted in the stepped hole of hanger 9.Pressure Contracting formula packer, utilizes the big expansion rate performance of compression type glue barrel can seal bigger annular clearance, and bearing capacity is relatively High.
Wherein, body 19 outer surface has longitudinal guiding gutter.The smooth outflow of cement 11 when guiding gutter can ensure well cementation.Each Longitudinally swell at radial hole;The thickness of cement 11 at this can be reduced, easily press off reservoir.
Embodiment 3:
Present embodiments provide a kind of side tracked slim hole separate stratum fracfturing method, inside former well, get out side-tracked hole 10, by tail Enter under tubing string in side-tracked hole 10, tail pipe column is cemented the well, after well cementation, open the pressure break passage of lower reservoir 6, tail pipe column and well Mouth tool string carries out the pressing crack construction of lower reservoir 6 after connecting;To upper reservoir 5 perforation, isolate with lower reservoir 6 afterwards, to upper reservoir 5 Carry out pressing crack construction.
This fracturing process need not down fracturing tool, has both met huge discharge pressing crack construction requirement, has evaded again lower going-into-well The risk of lower instrument.
Embodiment 3:
On the basis of embodiment 1 or embodiment 2, present embodiments provide a kind of side tracked slim hole separate stratum fracfturing method, former Getting out side-tracked hole 10 inside well, will enter in side-tracked hole 10 under tail pipe column, tail pipe column be cemented the well by cement 11, well cementation top For replacing during cement 11 into one section of lytic agent, lytic agent is for being positioned at the solvable eye pipe 16 of lower reservoir 6, solvable after cement 11 solidification Eye pipe 16 solvable plug 21 be completely dissolved, open the pressure break passage of lower reservoir 6, rear sleeve 2 in the first oil pipe 1, oil Pipe anchor 7, pressure break plug 8 are connected with tail pipe column upper end after being sequentially connected with, and carry out the pressing crack construction of lower reservoir 6;
Lower entrance aperture rifle, to upper reservoir 5 position of tail pipe column, to upper reservoir 5 perforation, forms perforation holes 12 on tail pipe column, rises Perforation hole rifle, puts into pressure break ball 13, and pressure break ball 13 is located on ball seat 14, isolates with the lower reservoir 6 pressed off, to upper reservoir 5 carry out pressing crack construction.
The present invention utilizes cementing 11 well cementing operation temporarily blocking functional realiey tail pipe of solvable eye pipe 16, utilizes solvable The dissolving function of eye pipe 16 opens lower floor's pressure break passage, eliminates the perforating job of lower reservoir 6, relative to well cementation sliding sleeve layering pressure Cracking method, has evaded the risk that sliding sleeve is not opened.
Embodiment 5:
Present embodiments provide a kind of side tracked slim hole separate stratum fracfturing method, specifically comprise the following steps that
Step 1) in sleeve pipe 2 enter whipstock 4, and sit the inwall being stuck in sleeve pipe 2, by the guiding of whipstock 4, sleeve pipe 2 entered Row flank hole is windowed, and sidetracking goes out side-tracked hole 10;
Step 2) send into by hanger the 9, second oil pipe 3, ball seat the 14, the 3rd oil pipe 15, solvable eye pipe the 16, the 4th oil pipe with drilling rod 17, tail pipe footwear 18 are sequentially connected with the tail pipe column of composition, under in the well of side, infusion cement 11 in drilling rod, cement 11 passes through tail Tubing string, returns to hanger 9 from the annular space that tail pipe column and side-tracked hole 10 are constituted, then casts glue in drilling rod and tail pipe column Plug replaces cement 11, adds afterwards at lytic agent extremely solvable eye pipe 16, and plug arrives tail pipe footwear 18 and builds the pressure at tail pipe footwear 18, outstanding Hanging device 9 sets in sleeve pipe 2, and cement 11 solidifies, and the solvable plug 21 of solvable eye pipe 16 is dissolved, and opens the pressure break of lower reservoir 6 Passage;
Step 3) trips out drilling rod, in sleeve pipe 2 under enter and be sequentially connected with from top to bottom by the first oil pipe 1, tubing anchor 7, pressure break plug 8 The tubing string of composition, under gravity, pressure break plug 8 sets in the stepped hole of hanger 9, lower reservoir 6 is carried out pressure break and executes Work;
Under step 4), entrance aperture rifle is to the position of the upper reservoir 5 of tail pipe column, and the tail pipe column at upper reservoir 5 is carried out cable perforation, Tail pipe column is formed perforation holes 12;
Step 5) trips out perforating gun, puts into pressure break ball 13, and pressure break ball 13 is located on ball seat 14, and closure presses off down below Reservoir 6, carries out pressing crack construction to upper reservoir 5;Separate stratum fracfturing is complete.
In sum, the present invention need not down fracturing tool, has both met huge discharge pressing crack construction requirement, has evaded again time Enter the risk of downhole tool, eliminate the perforating job of lower reservoir 6 simultaneously, relative to well cementation sliding sleeve separate stratum fracfturing method, evade The risk that sliding sleeve is not opened, and filled up tail pipe column the cement 11 of lower internal diameter 76mm in the slim-hole of internal diameter 118mm The blank of the separate stratum fracfturing technology of well cementation.
The method and structure that various embodiments above describes the most in detail belongs to the common knowledge of the industry, chats the most one by one State.
Exemplified as above is only the illustration to the present invention, is not intended that the restriction to protection scope of the present invention, all It is within design same or analogous with the present invention belongs to protection scope of the present invention.

Claims (8)

1. a side tracked slim hole layered fracturing pipe string, it is characterised in that: include sleeve pipe (2), be located in sleeve pipe (2) from top to bottom The first oil pipe (1) of being sequentially connected with, tubing anchor (7), pressure break plug (8), and tail pipe column, described sleeve pipe (2) has lateral brill Hole, described tail pipe column upper end is connected with pressure break plug (8), and lower end passes flank hole;
Described tail pipe column is by the hanger (9) being sequentially connected with from top to bottom, the second oil pipe (3), ball seat (14), the 3rd oil pipe (15), solvable eye pipe (16), the 4th oil pipe (17), tail pipe footwear (18) composition, described hanger (9) is connected with pressure break plug (8).
A kind of side tracked slim hole layered fracturing pipe string the most according to claim 1, it is characterised in that: described solvable eye pipe (16) include that body (19), described body (19) are provided with multiple radial hole, be equipped with in each radial hole sealing ring (22), can Molten plug (21), nut (20), described nut (20) is threadeded with body (19), by solvable plug (21) by sealing ring (22) it is pressed in the radial hole of body (19) on step.
A kind of side tracked slim hole layered fracturing pipe string the most according to claim 1, it is characterised in that: described pressure break plug (8) being compression packer, this pressure break plug (8) is inserted in the stepped hole of hanger (9).
A kind of side tracked slim hole layered fracturing pipe string the most according to claim 2, it is characterised in that: described body (19) is outward There is longitudinal guiding gutter on surface.
5. according to a kind of side tracked slim hole layered fracturing pipe string described in claim 2 or 4, it is characterised in that: each radial hole Place's longitudinally protuberance.
6. a side tracked slim hole separate stratum fracfturing method, it is characterised in that: inside former well, get out side-tracked hole (10), by tail Enter under tubing string in side-tracked hole (10), tail pipe column is cemented the well, after well cementation, opens the pressure break passage of lower reservoir (6), tail pipe column The pressing crack construction of lower reservoir (6) is carried out with rig tool series winding after connecing;To upper reservoir (5) perforation, afterwards with lower reservoir (6) every From, upper reservoir (5) is carried out pressing crack construction.
A kind of side tracked slim hole separate stratum fracfturing method the most according to claim 6, it is characterised in that: sidetracking in former well Going out side-tracked hole (10), will enter under tail pipe column in side-tracked hole (10), tail pipe column is cemented the well by cement (11), and well cementation replaces water Replacing into one section of lytic agent during mud (11), lytic agent replaces to solvable eye pipe (16) place being positioned at lower reservoir (6), after cement (11) solidification The solvable plug (21) of solvable eye pipe (16) is completely dissolved, and opens the pressure break passage of lower reservoir (6), rear sleeve (2) in First oil pipe (1), tubing anchor (7), pressure break plug (8) are connected with tail pipe column upper end after being sequentially connected with, and carry out the pressure of lower reservoir (6) Split construction;
Lower entrance aperture rifle, to upper reservoir (5) position of tail pipe column, to upper reservoir (5) perforation, forms perforation holes on tail pipe column (12), tripping out perforating gun, put into pressure break ball (13), pressure break ball (13) is located on ball seat (14), with the lower reservoir pressed off (6) isolation, carries out pressing crack construction to upper reservoir (5).
A kind of side tracked slim hole separate stratum fracfturing method the most according to claim 7, it is characterised in that specifically comprise the following steps that
Step 1) in sleeve pipe (2) enter whipstock (4), and sit the inwall being stuck in sleeve pipe (2), by the guiding of whipstock (4) Sleeve pipe (2) being carried out flank hole window, sidetracking goes out side-tracked hole (10);
Step 2) send into by hanger (9), the second oil pipe (3), ball seat (14), the 3rd oil pipe (15), solvable eye pipe with drilling rod (16), the 4th oil pipe (17), tail pipe footwear (18) be sequentially connected with the tail pipe column of composition, under in the well of side, pump priming in drilling rod Mud (11), cement (11) passes through tail pipe column, returns to hanger from the annular space that tail pipe column and side-tracked hole (10) are constituted (9), then cast plug in drilling rod and tail pipe column and replace cement (11), afterwards addition lytic agent extremely solvable eye pipe (16) place, glue Plug arrives tail pipe footwear (18) and builds the pressure at tail pipe footwear (18) place, and hanger (9) sets in sleeve pipe 2, and cement (11) solidifies, solvable eye The solvable plug (21) of pipe (16) is dissolved, and opens the pressure break passage of lower reservoir (6);
Step 3) trips out drilling rod, in sleeve pipe (2) under enter by the first oil pipe (1), tubing anchor (7), pressure break plug (8) from top to bottom Being sequentially connected with the tubing string of composition, under gravity, pressure break plug (8) sets in the stepped hole of hanger (9), to lower reservoir (6) pressing crack construction is carried out;
Under step 4), entrance aperture rifle is to the position of the upper reservoir (5) of tail pipe column, the tail pipe column at upper reservoir 5 is carried out cable and penetrates Hole, forms perforation holes (12) on tail pipe column;
Step 5) trips out perforating gun, puts into pressure break ball (13), and pressure break ball (13) is located on ball seat (14), and closure has been pressed below The lower reservoir (6) opened, carries out pressing crack construction to upper reservoir (5);Separate stratum fracfturing is complete.
CN201610616506.4A 2016-08-01 2016-08-01 A kind of side tracked slim hole layered fracturing pipe string and method Active CN106223917B (en)

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CN107489396A (en) * 2017-09-19 2017-12-19 西南石油大学 A kind of towed cementing method of small borehole bushing window sidetracking well
CN108049859A (en) * 2017-12-04 2018-05-18 中国石油天然气股份有限公司 A kind of method for realizing side tracked slim hole staged fracturing
CN109267943A (en) * 2017-07-17 2019-01-25 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 A kind of tieback string
CN109267983A (en) * 2017-07-17 2019-01-25 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 Horizontal well refracturing device and method based on the complete well of the preset tubing string of naked eye
CN109403943A (en) * 2018-09-26 2019-03-01 中国石油天然气股份有限公司 A kind of 3 cun of half sidetrack horizontal well staged fracturing method
CN110359896A (en) * 2019-08-05 2019-10-22 中国石油集团长城钻探工程有限公司 A kind of dual-lateral well fracturing technology method
CN110863811A (en) * 2019-12-04 2020-03-06 西华大学 Multi-branch zone fracturing tool
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CN111810106A (en) * 2020-08-05 2020-10-23 中国石油天然气股份有限公司 Three-inch half-slim hole sidetrack horizontal well efficient staged fracturing method
CN112502682A (en) * 2020-11-05 2021-03-16 中国石油天然气股份有限公司 Production method of preset small-diameter pipe for side drilling well and small-hole well

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CN109267943A (en) * 2017-07-17 2019-01-25 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 A kind of tieback string
CN109267983A (en) * 2017-07-17 2019-01-25 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 Horizontal well refracturing device and method based on the complete well of the preset tubing string of naked eye
CN107489396A (en) * 2017-09-19 2017-12-19 西南石油大学 A kind of towed cementing method of small borehole bushing window sidetracking well
CN107489396B (en) * 2017-09-19 2019-07-19 西南石油大学 A kind of towed cementing method of small borehole bushing window sidetracking well
CN108049859A (en) * 2017-12-04 2018-05-18 中国石油天然气股份有限公司 A kind of method for realizing side tracked slim hole staged fracturing
CN109403943A (en) * 2018-09-26 2019-03-01 中国石油天然气股份有限公司 A kind of 3 cun of half sidetrack horizontal well staged fracturing method
CN110359896B (en) * 2019-08-05 2021-10-26 中国石油天然气集团有限公司 Double-branch well fracturing process method
CN110359896A (en) * 2019-08-05 2019-10-22 中国石油集团长城钻探工程有限公司 A kind of dual-lateral well fracturing technology method
CN110863811A (en) * 2019-12-04 2020-03-06 西华大学 Multi-branch zone fracturing tool
CN110863811B (en) * 2019-12-04 2021-07-23 西华大学 Multi-branch zone fracturing tool
CN111472690A (en) * 2020-04-03 2020-07-31 中国石油天然气股份有限公司 Sidetracking well completion method
CN111810106A (en) * 2020-08-05 2020-10-23 中国石油天然气股份有限公司 Three-inch half-slim hole sidetrack horizontal well efficient staged fracturing method
CN112502682A (en) * 2020-11-05 2021-03-16 中国石油天然气股份有限公司 Production method of preset small-diameter pipe for side drilling well and small-hole well
CN112502682B (en) * 2020-11-05 2022-05-10 中国石油天然气股份有限公司 Production method of preset small-diameter pipe for side drilling well and small-hole well

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