CN209293677U - A kind of sidetracked hole may be selected to exempt to bore mill completion system - Google Patents

A kind of sidetracked hole may be selected to exempt to bore mill completion system Download PDF

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Publication number
CN209293677U
CN209293677U CN201821766115.1U CN201821766115U CN209293677U CN 209293677 U CN209293677 U CN 209293677U CN 201821766115 U CN201821766115 U CN 201821766115U CN 209293677 U CN209293677 U CN 209293677U
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China
Prior art keywords
bore
mill
exempt
control circuit
sidetracked hole
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CN201821766115.1U
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Chinese (zh)
Inventor
闫丽丽
刘建新
魏伟
韩博
张连煜
岳广韬
毛晓楠
李娜
周景彩
卢雅兰
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China Petroleum and Chemical Corp
Sinopec Research Institute of Petroleum Engineering Shengli Co
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China Petroleum and Chemical Corp
Sinopec Research Institute of Petroleum Engineering Shengli Co
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Priority to CN201821766115.1U priority Critical patent/CN209293677U/en
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Abstract

The utility model provides a kind of sidetracked hole and may be selected to exempt to bore mill completion system, the sidetracked hole may be selected to exempt to bore mill completion system to include that positioning centralising device exempts to bore mill windowing facility with removable, the positioning centralising device is located in pit shaft, sidetracked hole section accurate location is positioned, and righting is carried out to pit shaft and casing, this, which can be removed, exempts to bore mill windowing facility at the casing for needing window sidetracking oil reservoir position, when drilling needs the window sidetracking well section of branch, the removable brill mill windowing facility of exempting from is remotely controlled unlatching, directly open the casing section for needing side-drilling windowing, it need not go to bore the casing for grinding windowing position.A kind of sidetracked hole, which may be selected to exempt to bore mill completion system, substantially reduces sidetracked hole drilling cost, improves drilling efficiency, shortens the drilling period of practical sidetracked hole, sidetrack horizontal well, raising efficiency of investment return rate.Mitigate the labor intensity of operating personnel, reduces activity duration and cost.

Description

A kind of sidetracked hole may be selected to exempt to bore mill completion system
Technical field
The utility model relates to oil field development technical field, especially a kind of sidetracked hole may be selected to exempt to bore mill completion system.
Background technique
Currently, in fields such as oil and gas exploitations, sidetracked hole include sidetracking Multilateral Wells, multiple-limb lateral branching well etc. all It is sidetracked hole, the high development of horizontal well technology and Integration ofTechnology, mainly for the contact area increased as far as possible with oil reservoir position, Discharge oil-gas Layer energy more to improve final recovery ratio.The drilling technology of sidetracking Multilateral Wells has solved at present, still Complete well, sand control, there are no mating maturations for oil recovery lifting integrated technique.
For window sidetracking well, i.e., the whipstock on one steel body inclined-plane of appropriate location tripping in former wellbore, whipstock is used Implanting device and drilling tool G.I.H, whipstock are fixed after orienting with slips, with brill milling tool (usually milling cone) by wedge deflection tool Supporting guide effect, Jiang Yuanjing outputs the window of certain length, and then sidetracking branch directional well, forms new well in lower part Eye, both can use the old wellbore in top (including casing etc.) in this way, more effectively utilize platform and wellhead assembly, and reduction is bored again The expense of well, and its production capacity can be restored or after follow-up hole function etc..Some implements coiled tubing sidetracking in cased well The process is more complicated, first a set of flexible mechanical milling tool of tripping in, carries out casing sidetracking in sidetracking layer position, rises out after the completion Milling tool, then coiled tubing of the tripping in drill bit carries out horizontal drilling, and the main problem of the technology is early-stage preparations work It makes comparisons complexity, needs multiple running string to carry out section milling, reaming, drilling period is longer, and operation procedure is more complicated.State at present Swinging-out casement window sidetracking often uses milling cone, needs to block understratum in advance, increases activity duration and operating cost, and the country is opening a window After sidetracking, main borehole and branch well hole are often linked up by set milling and cutting or gunpowder perforation, operation is easy to cause to lose Effect, not only takes considerable time, increases labor intensity and operating cost, and complex process is cumbersome, windowing milling work Performance and efficiency are still unable to meet production demand.
The method that traditional approach often uses mechanical milling and drilling, the common grinding-milling equipment that opens a window is releasing device or machine Tool milling and drilling, the method operation difficulty that these remove downhole tool is big, consuming time is long, is easy to damage casing, In the presence of the drawback that consuming time is long, operating cost is high.In addition, if the outer protection without cement sheath of window point casing, casing are held Pressure energy power is weak, easily occurs casing crimping, tearing phenomenon in windowing-process, causes window quality poor.Window sidetracking mainly uses Drifting, pressure testing beat whipstock, windowing, cement injection, sweep up dust, test drilling, sidetracking, and process is time-consuming, laborious, complicates Sidetracking.And And the down-hole accidents such as card tubing string are be easy to cause, so that oil development is at high cost, risk is big, seriously affect oil field development benefit.
Chinese patent CN103089180A discloses a kind of casing side tracking well expandable screen completion method, and this method is by band There is the tail pipe tubing string G.I.H of expandable screen to predetermined position, suppresses seat and hang expansion hanger, make the rubber on expansion hanger Rubber ring, which is tightly attached in former casing, provides suspension sealing to completion tubular column, eliminates the annular space of screen casing and the borehole wall.However it should Method is only applicable to the complete well of branch's well section naked eye screen casing sidetracking, and well complete for branch's well section casing cementing and is not suitable for.
Chinese patent CN104265161A discloses free segment window sidetracking technique in 5 cun of half-covering tubes of one kind, and the technique is logical Drifting, pressure testing are crossed, whipstock is beaten, opens a window, repairing window, sidetracking, using drill bit, grooved drill collar, single bend PDM, heavy weight drill pipe, drilling rod The drilling tool that is successively interconnected to form carries out sidetracking, passes through the common of skew-swept airfoil and whipstock inclined-plane by the way of slipping drilling Effect, drill bit wedging stratum substantially increases the returns and efficiency of window sidetracking.However the process is only used for opening in casing The technique and supporting drilling tool of sidetracked hole 5 cun half-covering tube inwardly opened window sidetracking of the window point without cement sheath in window sidetracked hole, for windowing The pit shaft of sidetracking son field cementing well is simultaneously not suitable for.
In conclusion primarily focusing on the window sidetracking of casing in conventional method, it is ensured that the new wellbore wellbore quality of sidetracked hole, Restore old well production etc., and for may be selected to exempt from windowing brill mill a kind of efficient tool and process not yet.Thus It may be selected to exempt to bore mill completion system we have invented a kind of a kind of new sidetracked hole, solve the above technical problem.
Utility model content
It is simple to operate the purpose of the utility model is to provide a kind of reasonable in design, high efficiency, high safety, can A kind of sidetracked hole of strong operability may be selected to exempt to bore mill completion system.
The purpose of this utility model can be achieved by the following technical measures:
The sidetracked hole may be selected to exempt to bore mill completion system to include that positioning centralising device exempts to bore mill windowing facility with removable, this is fixed Position centralizer is located in pit shaft, positions to sidetracked hole section accurate location, and carries out righting to pit shaft and casing, this can be removed Exempt to bore mill windowing facility at the casing for needing window sidetracking oil reservoir position, when drilling needs the window sidetracking well section of branch When, which is remotely controlled unlatching, directly opens the casing section for needing side-drilling windowing, it is not necessary to go to bore The casing at mill windowing position.
The purpose of this utility model can be also achieved by the following technical measures:
The sidetracked hole may be selected to exempt to bore mill completion system to further include that can be removed to exempt to bore mill sidetracked hole bottom combination unit, this is removable Exempt to bore mill windowing facility except exempting to bore to grind sidetracked hole bottom combination unit and be connected to this and can be removed, have the function of being automatically positioned orientation, To facilitate completion tubular column tripping in, and positive/negative well-flushing construction is carried out when sidetracked hole branch well hole is sieve tube completion.
In the well section for needing sidetracking herring-bone form Multilateral Wells, which may be selected to exempt to bore mill completion system to include two groups or two Group or more this can be removed exempt from bore mill windowing facility, the positioning centralising device and this can be removed exempt from bore mill sidetracked hole bottom combination unit.
This can be removed exempt to bore mill windowing facility by oil pipe or coiled tubing, pitching, suppress or to send electric signal long-range Control is opened.
This, which can be removed, exempts to bore mill windowing facility including controlling signaling gear, first control circuit, second control circuit, third Control circuit, the 4th control circuit and arrestment mechanism, the control signaling gear are connected to the first control circuit, this second Control circuit, the third control circuit and the 4th control circuit, receive control signal, and will control signal be transferred to this first Control circuit is transferred to the second control circuit if the first control circuit is not received by, and so on be transferred to this Third control circuit, the 4th control circuit, the control circuit by receiving control signal parses control signal, and passes Defeated action signal gives the arrestment mechanism, which is connected to the first control circuit, the second control circuit, this Three control circuits and the 4th control circuit open switch under the control of action signal, this, which can be removed, exempts to bore mill windowing dress It sets movement and becomes one section of exposed casing section, directly open the casing section for needing side-drilling windowing.
This can be removed exempt from bore mill windowing facility include by different fixed forms bore inner cylinder and can magnetic material, this can magnetic Material, which is located at this, can be removed the bottom end for exempting to bore mill windowing facility.
The removable brill mill windowing facility of exempting from is process by easily grinding material or soluble material.
One of the utility model sidetracked hole may be selected to exempt to bore mill completion system, be related to a kind of sidetracked hole may be selected it is removable It is especially a kind of to carry out old well weight using original wellbore window sidetracking horizontal well except the sidetracked hole for exempting to bore mill windowing bores completion technique It bores, restores old well and increase production capacity.Therefore Sidetracking Technology has bigger superiority, on the one hand can play horizontal well height Effect, the advantage of high yield, increase drainage area, excavate potentiality of remaining oil, improve recovery ratio, improve Development Response of Oilfield.Another party Face can share a straight well section while exploit the same oil reservoir of two or more oil reservoirs or different directions, preferably It more reduces investment outlay while mining-employed reserves than horizontal well.Sidetracking Multilateral Wells technology slowly became one kind of oil-gas field development in recent years Important advanced technology, has been more and more widely used, wide market, and economic and social benefit is good, thus the technology There is wide development and application prospect in future.The utility model realizes need not when drilling needs the window sidetracking well section of branch Go bore mill windowing position casing, shorten the construction period of sidetracked hole, reduce operating cost, at the same reached main borehole with The unrestricted purpose of side-tracked hole size and number.Sidetracked hole drilling cost can be substantially reduced using this method, improves and bores Well efficiency shortens the drilling period of practical sidetracked hole, sidetrack horizontal well, improves efficiency of investment return rate.Mitigate operating personnel's Labor intensity reduces activity duration and cost.
Detailed description of the invention
Fig. 1 is that the sidetracked hole of the utility model may be selected to exempt to bore reality of the mill completion system in straight well or directional well sidetracked hole Apply the structure chart of example;
Fig. 2 is that Multilateral Wells sidetracking tripping in may be selected that the knot for exempting to bore mill completion tool can be removed in the embodiments of the present invention Structure schematic diagram;
Fig. 3 is that optional can be removed of horizontal well multistage sidetracking tripping in exempts to bore mill completion tool in the embodiments of the present invention Structural schematic diagram;
Fig. 4 is that the optional removable brill of exempting from of herring-bone form Multilateral Wells sidetracking tripping in has ground well work in the embodiments of the present invention The structural schematic diagram of tool;
Fig. 5 is the structural schematic diagram of branch's well section tripping in sand control screen or liner-type well completion in the embodiments of the present invention;
Fig. 6 is the structural schematic diagram of the complete well of branch's well section casing cementing in the embodiments of the present invention;
Fig. 7 is that the structural schematic diagram for exempting to bore mill windowing facility can be removed in the embodiments of the present invention.
Specific embodiment
To enable the above and other objects, features and advantages of the utility model to be clearer and more comprehensible, it is cited below particularly out preferably Embodiment, and cooperate shown in attached drawing, it is described in detail below.
Currently, side tracking mostly uses greatly window sidetracking milling processes, it is easily damaged cement sheath and casing, it is raw for the later period Production brings hidden danger, shortens horizontal well, sidetracked hole service life when serious.The task of the utility model is to be to provide a kind of sidetracking Well may be selected to exempt to bore mill completion tool and process, for intrinsic fracture oil reservoir, heterogeneous strong oil-gas reservoir, heavy crude reservoir, break Block oil reservoir, coal bed gas etc. are appropriate for the oil-gas Layer of multiple-limb exploration and development, realize different reservoir exploration and developments shorten the periods, The target for reducing cost, increasing yield.
The structure chart for exempting to bore mill completion system may be selected as shown in FIG. 1, FIG. 1 is the sidetracked hole of the utility model.The sidetracking Well, which may be selected to exempt to bore mill completion system, to be included positioning centralising device 3, can be removed to exempt to bore mill windowing facility 5 and can be removed and exempt to bore mill sidetracking Shaft bottom combination unit 6 etc., for horizontal well or high angle hole, particularly with the big part of hole instability and hole enlargement ratio, In the well section for needing sidetracking herring-bone form Multilateral Wells, it is also necessary to equipped with two groups or more removable exempt to bore mill windowing facility 5, Positioning centralising device 3 can be removed and exempt to bore the matching components such as mill sidetracked hole bottom combination unit 6.
Positioning centralising device 3 is with the function that sidetracked hole section accurate location is accurately positioned and to pit shaft 1 and casing 2 Carry out the dual function of righting.The quantity of positioning centralising device is determined according to the case where specific casing programme and sidetracking branch.
Removable brill mill windowing facility 5 of exempting from passes through oil pipe or coiled tubing, pitching, suppresses or send electric signal and remotely control System unlatching, so that control can be removed when exempting to bore the mill movement of windowing facility 5 so that drilling needs the window sidetracking well section of branch, directly Open the casing section for needing side-drilling windowing, it is not necessary to go to bore the casing at mill windowing position, shorten the construction period of sidetracked hole, reduce Operating cost.It can be removed and exempt to bore mill windowing facility 5 and have that (including pin, convex shoulder backing plate, seam allowance are solid by different fixed forms It is fixed etc.) bore inner cylinder, it is rotatable during feeding, push, the entire tubing string of drawing it is characterized in that after tubing string tripping in, can Circulation, rotatable tubing string, decide whether to cement the well as needed, therefore no matter take well cementation or barefoot completion mode, can under Enter to fish out lance or fishing tool salvages inner cylinder, fishing tool is made of small drill bit, sliding block trip spear, big drill bit, drilling rod female thread etc..
It can be removed and exempt to bore mill sidetracked hole bottom combination unit 6: being conducive to completion tubular column tripping in, and work as sidetracked hole branch well hole For positive/negative well-flushing construction can be carried out when sieve tube completion.
As shown in fig. 7, by oil pipe or coiled tubing, pitching, the modes such as suppress, such as opened by pitching/send telecommunications Number deliver control signaling gear 501, using control circuit 502~505 make arrestment mechanism 506 brake.Wireless launcher is put In control signaling gear 501, wireless launcher transmitting carries the code and current shape that control arrestment mechanism 506 switchs The wireless signal of state, when radio receiver detects the wireless signal that wireless launcher is launched, radio receiver The wireless signal received is exported to first control circuit 502, if first control circuit 502 is not received by, is exported To second control circuit 503, and so on output to third control circuit 504, the 4th control circuit 505, by the 4th control electricity Road 505 judges the signal according to the switching codes in the wireless signal received, and the 4th control circuit 505 parses the nothing received Action state in line signal, control arrestment mechanism 506, which makes to switch, to be opened, removable to exempt to bore mill windowing facility 5 and act to become one The exposed casing section of section directly opens the casing section for needing side-drilling windowing, meanwhile, remote controlled can be removed exempts to bore mill sidetracked hole Bottom combination unit 6 is opened, and removable brill mill sidetracked hole bottom combination unit 6 of exempting from has the function of that automatic positioning orients.
The removable material for exempting to bore mill windowing facility 5 is formed by easily grinding the composite processings such as material or soluble material, For metal or special material readily soluble, solvable, easily bore, material mainly includes metal material and nonmetallic materials, in metal material, Milling component is set easier to be dissolved in downhole fluid such as nanometer Mg powder material including can dissolve metal material;Nonmetallic materials In, such as polymer degradation material, nano-sized carbon element material, biodegradable material.It is soluble material, special thermally degradable Material, Biodegradable material and low melting point eutectic material and easily bore and remove material, using dissolvable, degradable, decomposable or Easily brill material can directly disappear in pit shaft molten or more easily than traditional material brill removes, the simple, construction period with flow chart The features such as short, operating risk is low and protection pit shaft, can be significantly reduced Well Development cost and later maintenance cost, economic benefit Significantly.
In embodiment, extended horizontal well is needed to match if horizontal well horizontal segment is longer or branch's number is more It covers multiple groups horizontal segment compensator, positioning centralising device and can be removed and exempt to bore mill sidetracked hole bottom combination unit, wherein is removable to exempt to bore mill Sidetracked hole bottom combine the unit bottom end connection can magnetic material, upper level drilling phase complete when shaft bottom using drilling rod connection tripping in can Magnetic material, it is lower to give up completion to bottom hole location, the tripping in frictional resistance of entire tubing string can be reduced.
Barefoot completion or the complete well of casing cementing well can be carried out, lower fishing lance, which is salvaged can be removed, exempts to bore mill windowing facility, inspection Whether unimpeded look into fishing spear circulation canal, whether sliding block movement is flexible, accurately calculates fishing spear according to the position of positioning centralising device Depth of setting, if less than specified calculating position under fishing spear, can stacks turn on pump circulation, be ground, until designated position, Upper lifting pipe post, which will can be removed, exempts to bore mill windowing facility taking-up pit shaft, and gauguste cutter is utilized to carry out drifting.It is opened even if can be removed and exempt to bore mill Window device inner cylinder cannot be salvaged out pit shaft, can also be disposed of well-flushing or by way of boring mill, realize and successfully open a window.
Tool realization, which exempts to bore, has ground well, relatively effectively protects cement sheath and casing, shortens well construction period and complete well Time realizes the unrestricted target of branch well hole size and number, while also overcoming the prior art and being both needed to bore milling windowing, The deficiency of cement sheath and casing easy to damage.It avoids and bores bad casing and cause the risk of card tubing string, effectively shorten the construction time, reduce Construction cost.
Main borehole can be straight well, directional well or horizontal well, save the expense of main borehole, including drilling cost, well head dress It is set to the various expenses such as sheet, processing cost in surface pipeline network cost, platform expense cost, drilling process.Because of each more wells A main hole is only bored, reduces the vertical well section part of each branch horizontal well or more in this way, a more wells are equivalent to more Saliva horizontal well, and increase drainage area can accelerate the extraction of oil gas so that oil well output greatly increases, to accelerate to invest back It receives, improves exploitation benefit, just reduce various costs in this way, because of few drilling well, ground installation is accordingly reduced or efficiency improves, The efficiency of platform also improves.Make to think that uneconomic oil field and ineffective marginal oil field can put into exploitation originally, can pass through It bores more wells and exploits region of bypassed oil, or small fault block, the small sand body etc. that are not produced originally on the basis of increased costs are little, in this way The recoverable reserves in oil field will be greatly increased.
As shown in Figure 1, being to drill into lower curved section or water in straight well section by taking Fig. 1 as an example in the pit shaft for carrying out needing sidetracking It in horizontal well section, is drilled into branch's well section in net horizontal section by taking Fig. 2, Fig. 3 as an example.
Specific method implementation steps are as follows:
It the steps include:
(1) either straight well or directional well, drifting are being opened to needing the well section of side-drilling windowing to carry out drifting from shaft bottom 8 It determines can be removed according to the specific location of positioning centralising device 3 at window sidetracking well section 4 and exempts to bore mill windowing facility 5.
(2) window sidetracking well section is needed to design well depth under casing, connection tripping in pipe string combination connects from bottom to top It can be removed and exempt to bore mill sidetracked hole bottom combination unit 6, can be removed and exempt to bore the pipes string structure tripping in such as mill windowing facility 5, positioning centralising device 3 In main hole 1, it is ensured that removable brill mill windowing facility 5 of exempting from is aligned at the position for the window sidetracking well section 4 for needing branch.
(3) by oil pipe or coiled tubing, pitching, the modes such as suppress, such as send electric signal and deliver control signaling gear 501, arrestment mechanism 506 is braked using control circuit 502~505, exempts to bore the mill movement change of windowing facility 5 to control and can be removed At one section of exposed casing section, meanwhile, remotely control can be removed and exempt to bore 6 unlatching of mill sidetracked hole bottom combination unit, so that drilling The casing for needing to go to bore when the window sidetracking well section 4 of branch mill windowing position, shortens the construction period of sidetracked hole, reduces Operating cost.
(4) if can not implement because of a variety of causes step (3), or it cannot make can be removed and exempt to bore mill windowing facility 5 Arrestment mechanism 506 is opened, and can be fished out lance below and be salvaged can be removed and exempt to bore mill windowing facility 5, check whether fishing spear circulation canal is smooth Logical, whether sliding block movement is flexible, fishing spear depth of setting is accurately calculated according to the position of positioning centralising device, if under fishing spear not To specified calculating position, can stacks turn on pump circulation, be ground until designated position, upper lifting pipe post, which will can be removed, exempt to bore mill and open Window device takes out pit shaft, carries out drifting using gauguste cutter.
(5) if can not implement because of a variety of causes step (4), or the brake for exempting to bore mill windowing facility 5 can be removed Structure 506 cannot be salvaged out pit shaft, can also be disposed of well-flushing or by way of boring mill, realize and successfully open a window.
(6) according to branch well hole and main borehole size relationship, exempt to bore the ground for grinding windowing facility 5 and contacting with removable The selection of layer exposed section carries out reaming hole to oriented branch wellbore or slim-hole is crept into, when branch well hole size is less than main borehole size When, the drilling of branch well hole is carried out with small drill bit, then setting of casing or sieve tube completion, as shown in figure 5, when needing the two size phase Meanwhile branch's reaming, reaming hole are crept into, suspension, which is carried out, with the expandable screen of size using coiled tubing feeding has sealed well.When When branch well hole needs identical as main borehole size simultaneously using cased hole completion, well is drilled using sidetracking Multilateral Wells described below Method has carried out well.
It is to be drilled into herring-bone form branch well section or net horizontal section in net horizontal section by taking Fig. 4 as an example.
Specific method implementation steps are as follows:
It the steps include:
(1) it when boring chance oil reservoir position, does not need to pierce shaft bottom 8 always, but is drilled into first point using drill assembly Reaming hole can be carried out when branch wellbore 7 or slim-hole drilling is directly oriented and bores the first branch well hole 7.
(2) drilling tool, and the tripping in completion tubular column in the first branch well hole 7 are played out after 7 finishing drilling of the first branch well hole, it can be with It is the sand control screens such as wire-wrapped screen, cutting seam sieve tube, prefabricated screen casing or directly carries out barefoot completion, instantly when 10 complete well of sieve tube segment, Close to the position of net horizontal section, connection, which be can be removed, exempts to bore mill windowing facility 5.
(3) it carries out after the completion of above-mentioned operation, being further continued for boring the second branch well hole 9 in net horizontal section for oil.
(4) it is repeated in the same manner the complete well of completion mode that the step of boring the first branch well hole is required, can be sand screen Pipe, slotted liner or directly carry out barefoot completion, as shown in figure 5, instantly 10 complete well of sieve tube segment when close to the position of net horizontal section Connection, which can be removed, exempts to bore mill windowing facility 5, then completes the drilling of the second branch well hole 9.
(5) and so on, the drilling of the herring-bone form lateral wellbore of 2 branch well holes is at least no less than until being fully completed Until.
(6) drilling to entire main hole 1 is completed.
(7) pull out of hole the last completion tubular column string needed for tripping in main hole 1 again, and main includes that can be removed to exempt to bore mill sidetracking Shaft bottom combination unit 6 can be removed and exempt to bore mill windowing facility 5, positioning centralising device 3, and the installation number for exempting to bore mill windowing facility 5 can be removed Amount determines that the number of positioning centralising device and position are true according to the practical concrete condition for boring chance oil reservoir according to the quantity of sidetracked hole branch It is fixed.
(8) by oil pipe or coiled tubing, pitching, the modes such as suppress, such as send electric signal and deliver control signaling gear 501, arrestment mechanism 506 is braked using control circuit 502~505, exempts to bore the mill movement change of windowing facility 5 to control and can be removed At one section of exposed casing section, meanwhile, remotely control can be removed and exempt to bore 6 unlatching of mill sidetracked hole bottom combination unit, can be removed and exempt from Boring mill sidetracked hole bottom combination unit 6 has the function of automatic positioning orientation.
(9) and then control can be removed and exempt to bore mill windowing facility 5, and the sealing mechanism 11 on sieve tube segment 10 is made to be tightly attached to former well set In pipe, suspension sealing is provided to completion tubular column.If son field uses casing cementing perforation completion mode, sealing mechanism 11 has The function of having suspension to seal, cooperation setting of casing assistor 13 can complete cementing concrete and recycle and effectively seal.
Wherein, the sequence of the first branch well hole 7 and the second branch well hole 9 can be interchanged, it can from close to net horizontal section Toe-end position start to creep into, can also since close to horizontal well well section heel end position creep into.
When being sieve tube completion for branch well hole, as shown in figure 5, i.e. sieve tube segment 10 can be by under oil pipe or coiled tubing When a variety of screen casing tubing strings such as the slotted liner, sand control screen, expandable screen, the wire-wrapped screen that enter, sealing mechanism 11 can be completed to sieve The function of pipe and the suspension sealing of main hole 1;When being cased hole completion for branch well hole, as shown in fig. 6, i.e. branch's well cementation section 12 is logical It crosses setting of casing assistor 13 and the smooth tripping in that auxiliary guarantees tubing string is carried out to casing, can complete to cement the well with the cooperation of sealing mechanism 11 Cement is recycled and is effectively sealed.
One of the utility model sidetracked hole may be selected to exempt to bore mill completion system, and sidetracking Multilateral Wells is made to realize Multilateral Wells It is several unrestricted, while may be selected can be removed and exempting to bore the mill complete well of sidetracking, so that creeping into when needing the window sidetracking well section of branch not It must go to bore the casing for grinding windowing position, removable brill mill apparatus of exempting from, can using dissolvable, degradable, decomposable or easy brill material Exempt mechanical process, directly disappear in pit shaft molten or quick removal.Realization exempt from bore grind well, relatively effectively protect cement sheath with Casing shortens well construction period and completion time, realizes the unrestricted target of branch well hole size and number, while also overcoming The prior art is both needed to bore milling windowing, the deficiency of cement sheath and casing easy to damage.The precision for realizing raising TRAJECTORY CONTROL is wanted It asks, avoids and bore bad casing and cause the risk of card tubing string, effectively shorten the construction time, reduce well construction period, save the construction time And cost, reduce construction cost.Brill mill drawback is overcome, has the characteristics that simplified flow chart, protection pit shaft.The utility model Sidetracked hole drilling cost can be substantially reduced, drilling efficiency is improved, shortens the drilling period of practical sidetracked hole, sidetrack horizontal well, Improve efficiency of investment return rate.Mitigate the labor intensity of operating personnel, reduces activity duration and cost.A kind of structure design is provided Rationally, simple to operate, high efficiency, high safety, the technology of strong operability.
The above is only the preferred embodiment of the present invention, non-the scope of the patents to limit the utility model, He should all belong to the scope of the patents of the utility model with the equivalence changes of the patent spirit of the utility model.I.e. except above-mentioned Outside embodiment, the utility model can also have other embodiments, all technical sides formed using equivalent substitution or equivalent transformation Case is all fallen in the protection scope of the requires of the utility model.

Claims (7)

1. a kind of sidetracked hole may be selected to exempt to bore mill completion system, which is characterized in that the sidetracked hole may be selected to exempt to bore mill completion system Windowing facility is ground including positioning centralising device and removable brill of exempting from, which is located in pit shaft, to the definite position of sidetracked hole section It sets and is positioned, and righting is carried out to pit shaft and casing, this, which can be removed to exempt to bore mill windowing facility and be located at, needs window sidetracking oil reservoir At the casing at position, when drilling needs the window sidetracking well section of branch, which is remotely controlled It opens, directly opens the casing section for needing side-drilling windowing, it is not necessary to go to bore the casing at mill windowing position.
2. a kind of sidetracked hole according to claim 1 may be selected to exempt to bore mill completion system, which is characterized in that the sidetracked hole can Selection exempts to bore mill completion system to further include that can be removed to exempt to bore mill sidetracked hole bottom combination unit, this, which can be removed, exempts to bore mill sidetracked hole bottom group It attaches together to set to be connected to this and can be removed and exempts to bore mill windowing facility, have the function of automatic positioning orientation, to facilitate completion tubular column tripping in, And positive/negative well-flushing construction is carried out when sidetracked hole branch well hole is sieve tube completion.
3. a kind of sidetracked hole according to claim 2 may be selected to exempt to bore mill completion system, which is characterized in that needing sidetracking The well section of herring-bone form Multilateral Wells, which, which may be selected to exempt to bore this that mill completion system includes two groups or more and can be removed, exempts from It bores mill windowing facility, the positioning centralising device and the removable brill of exempting from and grinds sidetracked hole bottom combination unit.
4. a kind of sidetracked hole according to claim 1 may be selected to exempt to bore mill completion system, which is characterized in that this, which can be removed, exempts from Bore mill windowing facility by oil pipe or coiled tubing, pitching, suppress or send electric signal and remotely control unlatching.
5. a kind of sidetracked hole according to claim 1 may be selected to exempt to bore mill completion system, which is characterized in that this, which can be removed, exempts from Boring mill windowing facility includes control signaling gear, first control circuit, second control circuit, third control circuit, the 4th control Circuit and arrestment mechanism, the control signaling gear are connected to the first control circuit, the second control circuit, the third control Circuit processed and the 4th control circuit receive control signal, and control signal are transferred to the first control circuit, if this One control circuit is not received by, then is transferred to the second control circuit, and so on be transferred to the third control circuit, this Four control circuits, the control circuit by receiving control signal parses control signal, and transmits action signal and give the system Motivation structure, the arrestment mechanism are connected to the first control circuit, the second control circuit, the third control circuit and this Four control circuits, make under the control of action signal switch open, this can be removed exempt from bore mill windowing facility movement become one section it is naked The casing section of dew directly opens the casing section for needing side-drilling windowing.
6. a kind of sidetracked hole according to claim 1 may be selected to exempt to bore mill completion system, which is characterized in that this, which can be removed, exempts from Bore mill windowing facility include by different fixed forms bore inner cylinder and can magnetic material, this can magnetic material be located at this and removable exempt from Bore the bottom end of mill windowing facility.
7. a kind of sidetracked hole according to claim 1 may be selected to exempt to bore mill completion system, which is characterized in that this, which can be removed, exempts from Mill windowing facility is bored to be process by easily grinding material or soluble material.
CN201821766115.1U 2018-10-29 2018-10-29 A kind of sidetracked hole may be selected to exempt to bore mill completion system Active CN209293677U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111101858A (en) * 2018-10-29 2020-05-05 中国石油化工股份有限公司 Selective drilling and grinding-free well completion device and method for sidetracking well

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111101858A (en) * 2018-10-29 2020-05-05 中国石油化工股份有限公司 Selective drilling and grinding-free well completion device and method for sidetracking well

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