CN107420044B - Casing reentries completion method - Google Patents

Casing reentries completion method Download PDF

Info

Publication number
CN107420044B
CN107420044B CN201710288784.6A CN201710288784A CN107420044B CN 107420044 B CN107420044 B CN 107420044B CN 201710288784 A CN201710288784 A CN 201710288784A CN 107420044 B CN107420044 B CN 107420044B
Authority
CN
China
Prior art keywords
drilling rod
casing
sleeve pipe
suspension
naked eye
Prior art date
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.)
Expired - Fee Related
Application number
CN201710288784.6A
Other languages
Chinese (zh)
Other versions
CN107420044A (en
Inventor
江楠
Original Assignee
江楠
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 江楠 filed Critical 江楠
Priority to CN201710288784.6A priority Critical patent/CN107420044B/en
Publication of CN107420044A publication Critical patent/CN107420044A/en
Application granted granted Critical
Publication of CN107420044B publication Critical patent/CN107420044B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • E21B7/00Special methods or apparatus for drilling
    • E21B7/20Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes

Abstract

The present invention relates to complete wells, provide a kind of casing reentry completion method, after forming naked eye, casing is placed in matched drilling rod, and front suspension device is installed into the wherein one end in the two, and when reentrying, one end of front suspension device is introduced into naked eye, then casing structure matched with drilling rod is sequentially connected to promote into naked eye, until casing total length is not less than the length of naked eye horizontal part, it then proceedes to be sequentially connected drilling rod until front suspension device is close to the front end of horizontal part, and then it builds the pressure and sets to front suspension device, so that its upper body is separated with lower body, it exerts a force on ground in face of drilling rod and rises with the upper body after separating by each drilling rod, each casing and lower body retain in naked eye.Casing is located in drilling rod when the present invention reentries, and since drilling rod has relatively thick, can carry biggish stress, more processing means can be used to handle the card that is hampered, and use front suspension device, it can turn on pump circulation scouring at any time, shorten construction period, and conveniently directly casing is directly salvaged.

Description

Casing reentries completion method
Technical field
The present invention relates to complete wells more particularly to a kind of casing to reentry completion method.
Background technique
In current completion practice, mainly for conventional gas and oil and unconventional oil and gas, in traditional process, two Person is all made of the mode of post suspending device, and post suspending device is located at the terminal position of casing, and casing is moved along naked eye, the two it Between directly contact, all have following disadvantage:1. due to the shadow for the performance parameters such as the unreasonable and casing wall of structure design is thin It rings, so that casing can not overload activity, it is even more impossible to reach rotation and the at any time function of turn on pump circulation;2. the defect of technique itself, In order to which the tubing string for achieving the purpose that the circulation technique is used has, drilling rod, screen casing, oil pipe, first under complete screen casing, then tripping in oil pipe, Drilling rod top is finally descended to send, the oil pipe shared that circulation ability is reentried by the drilling rod on top and lower part, structure is complicated, constructs numerous It is trivial;3. when due to setting of casing, still directly contacting with stratum, which hinders casing tripping in;4. construction personnel works, intensity is big, The technique screen casing and washing pipe are all only capable of manpower and detain above and below, and if turn on pump each time when lower screen casing, just a more washing pipe removes It bores, and extends the construction time;5. it is big to salvage difficulty, since casing topmost sets the position among underground by hanger, therefore The hanger set must be first salvaged, is salvaged if setting in protective casing and is likely to generate destruction to protective casing.
Summary of the invention
The purpose of the present invention is to provide a kind of casings to reentry completion method, it is intended to for solving existing completion practice In, trouble is salvaged, sleeve friction power is larger, and casing enters the shorter problem of horizontal section length in naked eye.
The invention is realized in this way:
The embodiment of the present invention provides a kind of casing reentry completion method, includes the following steps:
S1. naked eye is formed, the naked eye has horizontal part, vertical portion and the connection horizontal part and the vertical portion Bending part;
S2. sleeve is protruded into drilling rod, and front suspension device is installed at wherein one end of described sleeve pipe, before described Setting hanger includes upper body and lower body, and the upper body is connected and fixed with the drilling rod, and the lower body is corresponding with described sleeve pipe End is connected and fixed, and described sleeve pipe and the drilling rod are pushed into the naked eye by one end of the front suspension device;
S3. another casing is connected far from one end of the front suspension device in described sleeve pipe, while is arranged on the casing There is another drilling rod, which connect with the previous drilling rod, continues described in the described sleeve pipe after connecting and drilling rod push-in In naked eye, the front suspension device is moved along the naked eye;
S4. S3 step is repeated until the overall length of described sleeve pipe continues to be sequentially connected institute not less than the length of the horizontal part Drilling rod is stated to the front suspension device close to the front end of the horizontal part;
S5. the medium that builds the pressure is injected into the front suspension device, starts to build the pressure in the front suspension device until under described Body is set on the inner wall of the naked eye, and the upper body is separated with the lower body;
S6. it is exerted a force by the drilling rod to outside, the upper body after acting all drilling rods and separation, each institute It states casing and the lower body is respectively positioned in the naked eye.
It further,, will be described prior to offering rat hole on ground when protruding into described sleeve pipe in the corresponding drilling rod After drilling rod is extending at least partially into the rat hole, described sleeve pipe is protruded into the drilling rod by elevator.
Further, each described sleeve pipe and each drilling rod is isometric or similar length, is installing the front suspension device When, the elevator at least partly structure protrudes into the drilling rod and described sleeve pipe part is pushed to stretch out the drilling rod, before described The extension of the lower body and described sleeve pipe of setting hanger is connected and fixed.
Further, first described sleeve pipe length is greater than the length of first drilling rod, subsequent each described sleeve pipe with The corresponding drilling rod is isometric or similar length, and during installation, the one end of each described sleeve pipe far from the front suspension device Stretch out the corresponding drilling rod.
Further, and in being provided with derrick on ground, drilling rod is being protruded into the mouse close to the rat hole by the derrick When in hole, described sleeve pipe is hung on the derrick by the elevator, described sleeve pipe is located at the surface of the drilling rod, It is protruded into the drilling rod again by elevator control described sleeve pipe.
Further, after the front suspension device is installed, the lower body at least partly structure protrudes into the drilling rod Interior and promotion described sleeve pipe the other end at least partly stretches out the drilling rod, the extension of latter described sleeve pipe and the casing Divide and is connected and fixed.
Further, when needing to build the pressure to front suspension device, it first is implanted into plug to described sleeve pipe, the plug blocks Runner in the front suspension device, so that being disconnected between described sleeve pipe and the bottom of the naked eye, then to described sleeve pipe Interior lasting injection builds the pressure medium, the pressure of described sleeve pipe side be greater than the bottom side pressure of the naked eye until the upper body with The lower body separation.
Further, it is provided in the front suspension device and is unidirectionally led along the shaft bottom of the complete well to the direction of described sleeve pipe Logical check valve, when building the pressure to the front suspension device, it is described build the pressure medium by the naked eye inner wall and the drilling rod Imported between outer surface, and by the nozzle on the lower body enter the front suspension device check valve in.
Further, and before the lower body does not separate with the upper body need by the naked eye the drilling rod, It is first normal to act the drilling rod when casing and the front suspension device are all pulled out, and when there is described sleeve pipe, lifting Each described sleeve pipe is successively removed in the process, and when acting the front suspension device, first removes the drilling rod connecting with the upper body, The casing connecting with the lower body is removed again.
Further, and after the lower body is separated with the upper body it needs the described sleeve pipe in the naked eye is whole When pulling out, fishing tool is protruded into the naked eye and is engaged with the described sleeve pipe for being located at outside, by the fishing tool to The lower body pressurizes so that described sleeve pipe and the lower body are detached from, and the fishing tool proposes each described sleeve pipe.
The invention has the advantages that:
In method of the invention, when casing has been reentried well, casing is placed in drilling rod, this casing is moved along naked eye When dynamic, casing with the inner wall of naked eye without contacting, and the frictional resistance of casing is smaller, then casing can protrude into the deeper position of naked eye, Casing can extend longer distance along the horizontal part of naked eye, and each stress concentrates on drilling rod, without making to casing With, then can increase more processing means when reentrying, reentry it is more convenient, on the other hand, using the shape of front suspension device Formula, the front suspension device are installed in the front end of each casing, and front suspension device first protrudes into naked eye, i.e., front suspension device is located at set The inside of pipe can directly salvage casing when in this regard, salvaging in advance, facilitate salvaging.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram that casing provided in an embodiment of the present invention reentries completion method.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, the embodiment of the present invention provides a kind of casing reentry completion method, is mainly used for more casings 1 successively It imports in naked eye 2, naked eye 2 uses the structure type of horizontal well, and casing 1 can be protruded into the horizontal part 21 of naked eye 2, be specifically included Following steps:
S1. naked eye 2 is formed, naked eye 2 has the curved of horizontal part 21, vertical portion 22 and connection horizontal part 21 and vertical portion 22 Folding part 23 drills through naked eye 2 using drill string, and the port of naked eye 2 is located at the upper end position of vertical portion 22, and successively along vertical portion 22, The direction of bending part 23 and horizontal part 21 successively extends through;
S2. sleeve 1 is protruded into drilling rod 3, and front suspension device 4 is installed at wherein one end of casing 1, it is preposition outstanding Hanging device 4 includes upper body 41 and lower body 42, and upper body 41 is connected and fixed with drilling rod 3, and lower body 42 connect solid with the corresponding end of casing 1 It is fixed, casing 1 and drilling rod 3 are pushed into naked eye 2 by one end of front suspension device 4, when installation, first casing 1 is placed in drilling rod 3, Certainly the two is clearance fit, can form relative movement along its length between the two, then will be under front suspension device 4 Body 42 and one end of casing 1 are connected and fixed, and upper body 41 and the end of 3 the same side of drilling rod are connected and fixed, and certain upper body 41 is under To be detachably connected between body 42, generallys use several shear screws being disposed radially and be connected and fixed, and then can to cover Pipe 1, drilling rod 3 and front suspension device 4 are connected as an entirety, and when this to be integrally placed in above-mentioned naked eye 2, before having The one end for setting hanger 4 is introduced into the vertical portion 22 of naked eye 2;
S3. another casing 1 is connected far from one end of front suspension device 4 in casing 1, while is arranged with separately on the casing 1 One drilling rod 3, the drilling rod 3 are connect with previous drilling rod 3, continue the casing 1 after connecting and drilling rod 3 is pushed into naked eye 2, front suspension Device 4 is moved along naked eye 2, and in actual installation, first by the casing 1 and the push-in naked eye 2 of drilling rod 3 in S2, the two should have certainly At least partly structure is exposed, and then another casing 1 is placed in another drilling rod 3, then by the casing at the entirety of the two and naked eye 2 1 is connected and fixed with drilling rod 3, specifically, casing 1 is connected and fixed with casing 1, drilling rod 3 is connected and fixed with drilling rod 3, then proceed to by Overall structure continues to promote into naked eye 2, and front suspension device 4 is moved along the length direction of naked eye 2;
S4. repeat S3 step until the overall length of casing 1 is not less than the length of horizontal part 21, continue to be sequentially connected drilling rod 3 to Front suspension device 4 successively splices more casings 1 and more drilling rods 3 close to the front end of horizontal part 21, and splice one, will It is whole to push a distance to naked eye 2, then stop in horizontal part 21 front position of the front suspension device 4 close to naked eye 2 certainly Above-mentioned push-in movement, is now placed in the upper end of outermost drilling rod 3 close to ground, and the process can be according to the length of drilling rod 3 It spends and is determined the ratio between the length of naked eye 2;
S5. the medium that builds the pressure is injected into preposition hanger, by starting to build the pressure until front suspension in front suspension device 4 The lower body 42 of device 4 is set on the inner wall of naked eye 2, and upper body 41 is separated with lower body 42, the movement that builds the pressure for front suspension device 4 It can have diversified forms, specifically corresponding mode can be used according to the difference of front suspension device 4, such as in front suspension device When not having one-way valve structures in 4, a throat structure can be formed on the runner in front suspension device, under original state, casing 1 with By the runner connection in front suspension device 4 between the bottom of naked eye 2, when needing to build the pressure to front suspension device 4, then can first to Casing 1 is implanted into plug, and certain plug can be spherical structure, and plug is along the necking that casing 1 is rolled to front suspension device 4 and envelope The necking is blocked up, i.e. runner in front suspension device 4 is separated, and is disconnected between casing 4 and the bottom of naked eye 2, then to casing 1 Interior lasting injection builds the pressure medium, due to the closure of plug, so that the medium that builds the pressure is respectively positioned on 1 side of casing, so that casing 1 one The pressure of side is greater than the pressure of 2 bottom side of naked eye until after reaching pressure threshold, the lower body 42 of front suspension device 4 set in On 2 inner wall of naked eye, while being detached between lower body 42 and upper body 41, and in another embodiment, it is set in front suspension device 4 It is equipped with check valve, and casing 1 is specifically being protruded into naked eye 2 along the direction one-way conduction of 2 bottom of naked eye to casing 1 by check valve It is interior and in place after, into naked eye 2, injection builds the pressure medium, and the medium that builds the pressure of injection can make front suspension after entering in check valve The pressure of 2 bottom side of naked eye increases in device 4, so that front suspension device 4 is set on the inner wall of naked eye 2, and upper body 41 Separated with lower body 42, for the above two mode that builds the pressure, between usual upper body 41 and lower body 42 using it is several be arranged radially cut Screw connection is cut, several nozzles are provided on lower body 42, makes front suspension device 4 close to casing 1 by injecting the medium that builds the pressure Form pressure difference between the pressure of 2 bottom side of pressure and naked eye of side, so can push lower body 42 it is axially opposed on Body 41 is mobile, and each shear screw can fracture in the process of moving, and lower body 42 is separated with upper body 41, i.e., each casing 1 and Each drilling rod 3 separates, and certainly in this process, lower body 42 is not that entirety moves up, and housing and the casing 1 of lower body 42 are connected and fixed, and Its inner sleeve is mobile relative to upper body 41, and after moving a certain distance, and is pumped bust;
S6. it is exerted a force by the drilling rod 3 to outside, the upper body 41 after acting all drilling rods 3 and separation, each casing 1 is under Body 42 is respectively positioned in naked eye 2, and casing 1, which is located in naked eye 2, can be used for subsequent construction technology, and lower body 42 is then for that will cover Pipe 1 is positioned on the inner wall of naked eye 2, removes or generate biggish shifting for casing 1 during can preventing drilling rod 3 from rising out Position.
In above method step, when reentry, casing 1 is respectively positioned in corresponding drilling rod 3, the not inner wall with naked eye 2 of casing 1 Contact, and only contacted with the inner wall of drilling rod 3, and since casing 1 and drilling rod 3 are metal material, coefficient of friction between the two It is smaller so that the frictional resistance of reentrant procedure middle sleeve 1 is very small, casing 1 can be extended to along the horizontal part 21 of naked eye 2 compared with Remote position, it might even be possible to it reentries to the front end of horizontal part 21, in addition uses this reentry mode, since outside is drilling rod 3, Only need former drill string can by naked eye 2, casing 1 can pass through, and then can reduce the quality requirement of naked eye 2, due also to The wall thickness of drilling rod 3 is larger, can bear biggish stress, to this when reentry is hampered card, can use more place Reason means, for example lift from the top and put down, rotary moveable and turn on pump circulation etc., while it must be infused into naked eye 2 before playing out drilling rod 3 Enter the medium that builds the pressure, and the medium that builds the pressure can be not only able to play the role of building the pressure to front suspension device 4 using lubricant, Can also to form preferable lubricant effect between the outer surface of drilling rod 3 and the inner wall of naked eye 2, reduce drilling rod 3 and naked eye 2 it Between coefficient of friction, risen out convenient for drilling rod 3.Certainly, when front suspension device 4 to be installed to the front end in casing 1 and drilling rod 3, then Can turn on pump circulation scouring at any time, processing complex capabilities can be enhanced, reduce construction personnel and work intensity, shorten construction period, And conveniently directly casing 1 is directly salvaged.
Optimization above-described embodiment can will be bored when protruding into casing 1 in corresponding drilling rod 3 prior to offering rat hole on ground At least partly structure of bar 3 protrudes into the rat hole, may then pass through elevator and protrudes into casing 1 in the drilling rod 3.The present embodiment In, rat hole step is added, casing 1, which is built in drilling rod 3, can realize that the depth of usual rat hole can be with drilling rod 3 by rat hole Length is approximate, and to this when drilling rod 3 to be placed in rat hole, the upper port of drilling rod 3 can be incited somebody to action by elevator at this time close to earth's surface Casing 1 protrudes into drilling rod 3 along the upper port of drilling rod 3, and then completes suit between the two, and in this way, then can be with The positioning height of casing 1 when substantially reducing suit, for example, when casing 1 is 30m with drilling rod 3, when there is no rat hole, drilling rod 3 Lower end be located in earth's surface, and the upper end of casing 1 then should be located at 60m height and position, it is very troublesome, and use rat hole when, casing 1 Upper end only need 30m height, installation difficulty substantially reduces.Generally, it is provided with derrick on the ground, the derrick is close to mouse Hole allows casing 1 using steel wire hang on derrick, and pass through when protruding into drilling rod 3 in rat hole by elevator Adjust so that casing 1 is located at the surface of drilling rod 3, then again by elevator make casing 1 vertically under move up into drilling rod 3 It is interior, i.e., cooperated using derrick and rat hole, the above the ground 30m to this, 30m, derrick height only need 30m that can meet below ground Cooperation requirement between drilling rod 3 and casing 1, actually derrick should be located at the surface of naked eye 2, and drilling rod 3 is positioned by derrick With casing 2, and then facilitates and successively reentry drilling rod 3 and casing 1 in naked eye 2.
Continue to optimize above-described embodiment, when being set with drilling rod 3 and casing 1, two ways, one way in which can be used In, casing 1 and corresponding drilling rod 3 be isometric or similar length, when setting hanger 4 in a pre-installation to this, elevator at least portion Separation structure protrudes into drilling rod 3, while the part protruded into drilling rod 3 can push 1 part-structure of casing to stretch out drilling rod 3, and preposition The lower body 42 of hanger 4 is then fixedly connected with the extension of casing 1.In the present embodiment, cooperate using derrick and rat hole When covering tubing 1 and drilling rod 3, the upper end of casing 1 is connected with elevator, and when protruding into casing 1 in drilling rod 3, elevator portion Separation structure protrudes into the wherein Single port of drilling rod 3, and since casing 1 and drilling rod 3 are isometric, then casing 1 can be by the another port of drilling rod 3 Extension structure, the part-structure that casing 1 stretches out then can be convenient to be connected and fixed with the lower body 42 of front suspension device 4, the two After connecting by hydraulic tongs, push casing 1 mobile to one end of elevator, elevator is pushed out drilling rod 3 and casing 1 has portion Separation structure is stretched out by the port of drilling rod 3, and there is the lower body 42 of front suspension device 4 part-structure to protrude into the another of drilling rod 3 at this time In port, upper body 41 and the drilling rod 3 of front suspension device 4 are connected and fixed, to this by casing 1, drilling rod 3 and front suspension device 4 When in whole merging naked eye 2, the upper port of drilling rod 3 is stretched out in the upper end of casing 1, so as to sleeve 1 after convenience with it is preceding a set of Pipe 1 is connected and fixed, and after latter drilling rod 3 is connected and fixed with previous drilling rod 3, then after there is preceding sleeve 1 part-structure to protrude into In one drilling rod 3, and then the upper port that there is part-structure to stretch out latter drilling rod 3 for the upper end of sleeve 1 after can pushing, it is such as such It pushes away, in the installation connection procedure of subsequent casing 1 and drilling rod 3, the upper end of casing 1 is made to stretch out the upper of corresponding drilling rod 3 always Port, and then it is facilitated to connect with subsequent casing 1, extension elongation generally described above is about 60cm, i.e., under front suspension device 4 It is 60cm that body 42, which protrudes into the length in drilling rod 3, and the length that casing 1 stretches out corresponding drilling rod 3 is also 60cm.In general, without adopting always The structure type cooperated with casing 1 and drilling rod 3, for example, it is equal to or slightly greater than naked when calculating 1 overall length of casing into naked eye 2 When 21 length of horizontal part of eye 2, casing 1 can be reentried no longer into naked eye 2, so that after the completion of construction, the horizontal part 21 of naked eye 2 It being inside packed with casing 1 or outermost casing 1 extends to 23 position of bending part, certain drilling rod 3 should continue to import, so that Outermost drilling rod 3 extends to the port position of naked eye 2.And in another embodiment, the length of first casing 1 is greater than The length of first drilling rod 3, generally 60cm work as the two to this when first casing 1 to be sheathed in first drilling rod 3 Lower end when flushing, the length of first casing 1 stretches out first 3 upper end 60cm of drilling rod, and subsequent each casing 1 with it is corresponding Drilling rod 3 it is isometric or close, in this regard, in subsequent installation, each casing 1 stretches out the corresponding about 60cm of drilling rod 3, Ke Yifang Just subsequent casings 1 are connected and fixed with preceding sleeve 1, and certainly in this structure type, front suspension device 4 is without partially protruding into the In a piece casing 1.
When needing to salvage, two ways can be divided into according to the actual situation and be salvaged, one of situation is preceding It sets before hanger 4 builds the pressure, i.e., is not separated between the upper body 41 of front suspension device 4 and lower body 42, needing at this time will be in naked eye 2 Drilling rod 3, casing 1 and front suspension device 4 when all salvaging, first can normally play out drilling rod 3, every goes out a drilling rod 3 and just will It is dismantled, and when there is casing 1, using the upper end of elevator connecting sleeve 1, then dismantles drilling rod 3 using hydraulic tongs, on The casing 1 is dismantled after proposing a distance, successively dismantles drilling rod 3 and casing 1 in this way, and work as and front suspension device 4 occur Afterwards, first release the connection structure between the upper body 41 and drilling rod 3 of front suspension device 4, then release the lower body 42 of front suspension device 4 with Connection structure between casing 1.
And in another scenario, front suspension device 4 builds the pressure after completion, i.e. the upper body 41 of front suspension device 4 and lower body It has been separated between 42, when needing all to pull each casing 1 in naked eye 2 out at this time, has there is drilling rod 3 and front suspension device 4 When upper body 41, normally the two first can be taken out, and after the two rises out, then first fishing tool is protruded into naked eye 2, is arrived The suspending weight of fishing tool is measured after up to designated position, can pressurize 10t using fishing tool at this time, by fishing tool and be located at outer The casing 1 of side is engaged, and above mentions fishing tool at this time, detects suspending weight by pressure gauge, after suspending weight increase if continue through salvaging Tool is pressurized into each casing 1, and then will can be used to connect between innermost casing 1 and the lower body 42 of front suspension device 4 Safety pin cut, lower body 42 can be separated with innermost casing 1, can be by each casing 1 entirely after measuring stable suspending weight Portion pulls naked eye 2 out, and certainly after continuing pressurization, the suspending weight measured does not increase, then shows that the casing 1 in fishing tool and outside is stung It closes poor, then continues the 10t that pressurizes, so that contact is close between the two.And after each casing 1 all rises, it preposition can will hang The lower body 42 of hanging device 4 retains in naked eye 2, its own length is only 1m, and is located at the bottom of naked eye 2, will not influence the later period Operation when needing also to play out it certainly, then can change fishing tool, lower drill bushing wash the lower body 42 of front suspension device 4 and by its Salvage naked eye 2.In addition, when fishing tool is engaged with the casing 1 in outside, the usual outboard end of casing 1 on the outside Necking 11 is provided at mouthful, and the necking 11 is in gradually-reducing shape along the direction close to front suspension device 4, when salvaging, work as fishing tool After pressurization, at least partly structure is clamped in the necking 11, and uses this 11 structure of necking, can be convenient fishing tool end Portion protrudes into, and can guarantee the compactness connected between the two.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.

Claims (12)

1. a kind of casing reentries completion method, which is characterized in that include the following steps:
S1. naked eye is formed, the naked eye has the bending of horizontal part, vertical portion and the connection horizontal part and the vertical portion Portion;
S2. sleeve is protruded into drilling rod, and front suspension device is installed at wherein one end of described sleeve pipe, it is described preposition outstanding Hanging device includes upper body and lower body, and the upper body is connected and fixed with the drilling rod, the corresponding end of the lower body and described sleeve pipe It is connected and fixed, described sleeve pipe and the drilling rod is pushed into the naked eye by one end of the front suspension device;
S3. another casing is connected far from one end of the front suspension device in described sleeve pipe, while is arranged with separately on the casing One drilling rod, the drilling rod are connect with the previous drilling rod, continue the described sleeve pipe after connecting and the drilling rod is pushed into the naked eye Interior, the front suspension device is moved along the naked eye;
S4. S3 step is repeated until the overall length of described sleeve pipe continues to be sequentially connected the brill not less than the length of the horizontal part Bar is to the front suspension device close to the front end of the horizontal part;
S5. the medium that builds the pressure is injected into the front suspension device, starts to build the pressure in the front suspension device until the lower body is sat It is encapsulated on the inner wall of the naked eye, and the upper body is separated with the lower body;
S6. it is exerted a force by the drilling rod to outside, the upper body after acting all drilling rods and separation, each set Pipe is respectively positioned in the naked eye with the lower body.
2. casing as described in claim 1 reentries completion method, it is characterised in that:Described sleeve pipe is being protruded into the corresponding brill When in bar, prior to offering rat hole on ground, after the drilling rod is extending at least partially into the rat hole, by elevator by institute Casing is stated to protrude into the drilling rod.
3. casing as claimed in claim 2 reentries completion method, it is characterised in that:Each described sleeve pipe and each drilling rod are isometric Or similar length, when installing the front suspension device, the elevator at least partly structure is protruded into the drilling rod and is pushed away The drilling rod is stretched out in dynamic described sleeve pipe part, and the lower body of the front suspension device and the extension connection of described sleeve pipe are solid It is fixed.
4. casing as claimed in claim 2 reentries completion method, it is characterised in that:First described sleeve pipe length is greater than first The length of drilling rod described in root, subsequent each described sleeve pipe and the corresponding drilling rod be isometric or similar length, and during installation, each The corresponding drilling rod is stretched out in the one end of described sleeve pipe far from the front suspension device.
5. casing as claimed in claim 2 reentries completion method, it is characterised in that:It is described and in being provided with derrick on ground Derrick is close to the rat hole, and when protruding into drilling rod in the rat hole, described sleeve pipe is hung on the derrick by wirerope On, described sleeve pipe is located at the surface of the drilling rod, protrudes into the drilling rod again by elevator control described sleeve pipe.
6. casing as described in claim 1 reentries completion method, it is characterised in that:It is installed in the front suspension device Afterwards, the lower body at least partly structure protrudes into the drilling rod and the other end of described sleeve pipe is pushed at least partly to stretch out the brill The extension of bar, latter described sleeve pipe and described sleeve pipe is connected and fixed.
7. casing as described in claim 1 reentries completion method, it is characterised in that:When needing to build the pressure to front suspension device, First to described sleeve pipe be implanted into plug, the plug blocks the runner in the front suspension device so that described sleeve pipe with it is described It is disconnected between the bottom of naked eye, the medium that builds the pressure then persistently is injected into described sleeve pipe, the pressure of described sleeve pipe side is greater than The bottom side pressure of the naked eye is until the upper body is separated with the lower body.
8. casing as described in claim 1 reentries completion method, it is characterised in that:It is provided in the front suspension device along institute Stated the shaft bottom of well to described sleeve pipe direction one-way conduction check valve, it is described to suppress when building the pressure to the front suspension device Press medium by importing between the inner wall of the naked eye and the outer surface of the drilling rod, and as described in the nozzle entrance on the lower body In the check valve of front suspension device.
9. casing as described in claim 1 reentries completion method, it is characterised in that:And do not divide in the lower body and the upper body It is first normal to rise when from needing all to pull the drilling rod, casing and the front suspension device in the naked eye out before The drilling rod, and when there is described sleeve pipe, each described sleeve pipe is successively removed during lifting, and described preposition outstanding rising When hanging device, the drilling rod connecting with the upper body is first removed, then remove the casing connecting with the lower body.
10. casing as described in claim 1 reentries completion method, it is characterised in that:And in the lower body and the upper body point When from needing all to pull the described sleeve pipe in the naked eye out later, fishing tool is protruded into the naked eye and outer with being located at The described sleeve pipe of side is engaged, and is pressurizeed to the lower body so that described sleeve pipe and lower body disengaging, institute by the fishing tool It states fishing tool and proposes each described sleeve pipe.
CN201710288784.6A 2017-04-27 2017-04-27 Casing reentries completion method Expired - Fee Related CN107420044B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710288784.6A CN107420044B (en) 2017-04-27 2017-04-27 Casing reentries completion method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710288784.6A CN107420044B (en) 2017-04-27 2017-04-27 Casing reentries completion method

Publications (2)

Publication Number Publication Date
CN107420044A CN107420044A (en) 2017-12-01
CN107420044B true CN107420044B (en) 2018-11-27

Family

ID=60425655

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710288784.6A Expired - Fee Related CN107420044B (en) 2017-04-27 2017-04-27 Casing reentries completion method

Country Status (1)

Country Link
CN (1) CN107420044B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109209230B (en) * 2018-09-19 2019-10-15 中国地质科学院勘探技术研究所 A kind of shallow-layer horizontal well soft stratum deflecting hole section setting of casing method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101122220A (en) * 2007-09-21 2008-02-13 中国石油天然气集团公司 Swelling type screen pipe suspension method and swelling type screen pipe hanger
CN102704876A (en) * 2012-05-28 2012-10-03 中国石油天然气集团公司 Method and tool for putting well completion pipe down by utilizing drill rod
CN103573239A (en) * 2012-07-31 2014-02-12 中国石油化工股份有限公司 Staged fracturing device and using method thereof
CN204627516U (en) * 2015-05-12 2015-09-09 中国石油化工股份有限公司 Tail pipe packer setting device and packing formula extension hanger

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103775015B (en) * 2012-10-18 2016-11-16 中国石油化工股份有限公司 Expand instrument under cased well and use its expansion sleeve method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101122220A (en) * 2007-09-21 2008-02-13 中国石油天然气集团公司 Swelling type screen pipe suspension method and swelling type screen pipe hanger
CN102704876A (en) * 2012-05-28 2012-10-03 中国石油天然气集团公司 Method and tool for putting well completion pipe down by utilizing drill rod
CN103573239A (en) * 2012-07-31 2014-02-12 中国石油化工股份有限公司 Staged fracturing device and using method thereof
CN204627516U (en) * 2015-05-12 2015-09-09 中国石油化工股份有限公司 Tail pipe packer setting device and packing formula extension hanger

Also Published As

Publication number Publication date
CN107420044A (en) 2017-12-01

Similar Documents

Publication Publication Date Title
CN107420044B (en) Casing reentries completion method
CN109538134B (en) Application method of petroleum underground safety joint
CN201448073U (en) Self-dragging resisting slip
CN201110143Y (en) Fluid pressure tailpiece hanger
CN205778713U (en) A kind of hydraulic packer
CN101718170B (en) Performing six-grade branch well system tool
CN111411917A (en) Liner cementing tool with packer and cementing method
CN101614114B (en) Self-fishing up-running preventing slip
CN104481438B (en) Tail tubing feeding tool used for open well anchoring tie-back well completion technology of multilateral well
CN204386537U (en) A kind of reversible drags for lance
CN109779538B (en) Petroleum downhole operation device
CN209040783U (en) Bidirectionally anchoring device
CN106567687A (en) Top-down expandable casing expansion method for deep well
CN205714137U (en) Compensation separate injection tubing string
CN201695990U (en) Split-type slip hanger packer
CN204716194U (en) A kind of bridging plug and releasing gadget thereof
CN202273611U (en) Mechanical anti-jacking slip
CN103397862B (en) A kind of hanger
CN103397861B (en) A kind of Non-workover pump detection device for electric submersible pump
CN212671707U (en) Underground switch device for controlling pressure in shaft
CN205840830U (en) Hydraulic pressure twin-stage sleeve pipe prestressed ground anchors
CN106823190A (en) A kind of inverted L-shaped deep-well rescue device and method
CN214944177U (en) CO (carbon monoxide)2Oil well driving non-killing oil production pipe column
CN215256110U (en) A drag for rope instrument for in petroleum well
CN213510497U (en) Pulling device for traction cable fixing pin of well bottom pipe of dewatering well

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20181127

Termination date: 20200427

CF01 Termination of patent right due to non-payment of annual fee