CN108979583A - A kind of sidetracked hole layer and section cementing unit and application method - Google Patents

A kind of sidetracked hole layer and section cementing unit and application method Download PDF

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Publication number
CN108979583A
CN108979583A CN201810765671.5A CN201810765671A CN108979583A CN 108979583 A CN108979583 A CN 108979583A CN 201810765671 A CN201810765671 A CN 201810765671A CN 108979583 A CN108979583 A CN 108979583A
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China
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cement injection
layer
pipe
well
well cementation
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CN201810765671.5A
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CN108979583B (en
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马弘毅
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Fuzhou Yuzhuo Technology Co., Ltd
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马弘毅
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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
    • 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
    • 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
    • E21B33/126Packers; Plugs with fluid-pressure-operated elastic cup or skirt
    • 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

Abstract

The present invention relates to a kind of sidetracked hole layer and section cementing unit and application methods.Its technical solution is: the left end of blind plugging is by well cementation cement injection pipe nipple connection the first well cementation oil pipe, and self-styled, hydro-expansive rubber and K344 packer are successively installed in the outside of the first well cementation oil pipe, and the first well cementation oil pipe is equipped with cement injection mouth and circulation port;The upper end of first well cementation oil pipe is sequentially connected mechanical switch, hydraulic selector and signaling switch, left end connection the second well cementation oil pipe of signaling switch, and forms the sidetracking well cementation tubing string of multiple producing horizons, and realize layering cement injection and well cementation.Beneficial effect is: the technique that the present invention uses can simply put into steel ball by ground, suppress the layer and section well cementation that multiple oil reservoirs can be realized, by above mention cement injection core pipe and give up circulation pipe string can be in place by hydraulic selector, signaling switch and mechanical switch, convenient for subsequent oil production by layer, entire technique and easy to operate, it is convenient to carry out, and solve the problems, such as the restricted diameter in sidetracking hole.

Description

A kind of sidetracked hole layer and section cementing unit and application method
Technical field
The present invention relates to a kind of oil gas field sidetracked hole cementing unit and application method, in particular to a kind of sidetracked hole layering point Section cementing unit and application method.
Background technique
In the recovery process of oil gas field, there is a large amount of exhaust gas well (i.e. the not well of extraction value), and these wells In, nearby there is also good well, a large amount of unquarried oil-gas Layer is deposited, saves face cost to economize on resources, then Petroleum operations side generally can be by the way of sidetracked hole, and SIDETRACKING TECHNOLOGY is exactly to fix one in a certain certain depth of oil-water well Whipstock using its inclined-plane deflecting and leads oblique effect, is opened a window with milling cone in the side of casing, drills out new wellbore from window, then A whole set of technology of lower drilling liner cementing.
In addition, there are many multilayer position in numerous sidetracked holes, and in the oil reservoir of these multilayer positions, technical parameter Again it is often different, if any the aqueous height in layer position, although some layer positions oil-containing is high, stratum energy is poor, therefore, such as Fruit is able to achieve oil production by layer, will be very necessary and advantageous thing.
During separate zone production, since required tool construction is more complicated, in this way, just affecting the interior of tubing string Latus rectum, and the internal diameter of a tubing string exactly highly important parameter in oil exploitation, due to using Sidetracking, this Sample, the diameter in sidetracking hole are exactly a limited parameter, if first cementing the well, being layered again again by the way of traditional, then by Small in latus rectum, there is very big difficulties in implementation process.And the technology that the present invention designs is exactly in order to solve this problem.
Summary of the invention
The purpose of the present invention is to drawbacks described above of the existing technology, provide a kind of sidetracked hole layer and section well cementation Device and application method by cement injection core pipe and are given up by the tripping in cement injection core pipe in former casing and circulation pipe string of giving up The layer and section well cementation of sidetracked hole is realized in the cooperation of circulation pipe string, which can be realized layering by suppressing in terrestrial operation The function of cement injection well cementation.
A kind of application method for sidetracked hole layer and section cementing unit that the present invention mentions, technical solution is: including with Lower step:
The first step requires in the former casing (47) of oil well according to well-log information, and tripping in finder (44) carries out sidetracked hole, And continues lateral or oblique drill out open hole;Then, entire sidetracked hole layer and section cementing unit is assembled on ground, it directly will be whole Sidetracking well cementation tubing string, cement injection core pipe and give up in circulation pipe string tripping in open hole, wherein sidetracking well cementation tubing string include blind plugging (1), Well cementation cement injection pipe nipple (2), the first well cementation oil pipe (11), the first mechanical switch (12), the first hydraulic selector (14) and the first signal Switch (18), the second well cementation oil pipe (27), the second mechanical switch (31), the second hydraulic selector (32) and second signal switch (33) It tiltedly cements the well oil pipe with top, each oil reservoir is separated by self-styled, hydro-expansive rubber, K344 packer, at this point, the first note Grey mouth (4) and first circulation hole (6) and the second cement injection mouth (23), second circulation hole (24) and top layer cement injection mouth and top layer follow Annular distance is respectively at closed state;
Second step is suppressed downwards by cement injection core pipe (46), and setting sealing-plug (16) is hit down, it is made to fall into mortar injector (7) then bottom, in terrestrial operation, passes through note so that the first cement injection mouth (4) of setting sealing-plug (16) barrier be opened Mortar is slowly injected into and through the first cement injection mouth (4) and is injected into stratum by grey core pipe (46), is formed the first cement injection layer, is worked as earth's surface Pressure stop cement injection when rising to design pressure 15-25MPa of value, and pass through cement injection core pipe (46) and circulation pipe string of giving up (45) Between annular space carry out anti-flushing well, cement injection core pipe is cleaned up, until ground liquid outlet be clear water until, i.e., completion first The cement injection process of cement injection layer;
Third step puts into small ball into cement injection core pipe on ground, small ball is suitable after the completion of the cement injection process of the first cement injection layer Cement injection core pipe drop on small sealed ball seat (26), small sealed ball seat (26) is set, then is suppressed, at this point, connection it is small The cement injection shear pin of sealed ball seat is cut, to make small sealed ball seat (26) fall on the limited block of lower right, by barrier Second cement injection mouth (23) is opened, at this point, due to being equipped with first layer self-styled (19), first layer on the right side of the second cement injection mouth (23) With water-swellable self-styled (20) and first layer K344 packer (21), the second cement injection mouth (23) left side is equipped with the second layering and uses Self-styled (28), the second layering use K344 packer (30) with hydro-expansive rubber (29) and the second layering;So being infused by ground The mortar entered is injected into the second cement injection layer by cement injection core pipe (46) by the second cement injection mouth (23), when the pressure of earth's surface rises to When design pressure 15-25MPa of value, stop cement injection, and pass through the annular space between cement injection core pipe (46) and circulation pipe string of giving up (45) Anti-flushing well is carried out, cement injection core pipe is cleaned up, until the liquid outlet on ground is clear water, that is, completes the note of the second cement injection layer Ash process;
4th step puts into big steel ball, big steel ball into cement injection core pipe after the completion of the cement injection process of the second cement injection layer, then from ground It drops on big sealed ball seat (38), big sealed ball seat (38) is set, then suppressed along cement injection core pipe, at this point, connection The top layer shear pin for replying sealed ball seat is cut, so that big sealed ball seat (38) be made to fall on the limited block of lower right, will be hindered Every top layer cement injection mouth open;At this point, being used and being met with self-styled (28), the second layering due to being equipped with the second layering on the right side of top layer cement injection mouth K344 packer (30) are used in water-expansible rubber (29) and the second layering, and the left side of top layer cement injection mouth is equipped with third and is layered with self-styled (34), third layering uses K344 packer (36) with hydro-expansive rubber (35) and third layering;So injected by ground Mortar is injected into third cement injection layer by cement injection core pipe (46) by top layer cement injection mouth, when the pressure of earth's surface rises to design pressure When 15-25MPa of value, stop cement injection, and backwash is carried out by the annular space between cement injection core pipe (46) and circulation pipe string of giving up (45) Well cleans up cement injection core pipe, until the liquid outlet on ground is clear water, that is, completes the cement injection process of third cement injection layer;
5th step carries out operation of giving up after the completion of cement injection, by above proposing cement injection core pipe (46) and circulation of giving up in ground well head Tubing string (45) is proposed former casing (47), completes layer and section cementing operation.
Preferably, in the upper operation for mentioning cement injection core pipe (46) and circulation pipe string of giving up (45), due to circulation pipe string of giving up (45) right end be connected with cement injection sealing sliding sleeve (3), after above mentioning, cut reinforcing shear pin (52), cement injection seal sliding sleeve (3) along It cements the well into the limiting groove movement of grey pipe nipple (2) inner wall, and is cooperated by support ring (53) and preformed groove A, to lock cement injection It seals sliding sleeve (3), and the first cement injection mouth (4) and first circulation hole (6) is closed;Similarly, cement injection shear pin (25) have been cut, also will Second cement injection mouth (23) and second circulation hole (24) are closed;Similarly, top layer cement injection mouth and top-level cycle hole are closed.
Preferably, in the upper operation for mentioning cement injection core pipe (46) and circulation pipe string of giving up (45), circulation pipe string of giving up (45) Drive overcurrent connector sleeve (15) mobile, overcurrent connector sleeve (15) opens set by hydraulic selector reinforcing shear pin (59) band dynamic program (13) mobile, to open commutation hole (56), inlet opening (57) and the balance hole (58) of the first hydraulic selector (14), and program It opens set (13) program is opened into set (13) by support ring (60) and be fixed on the left sides of hydraulic selector central tube (55), realize the The unlatching of one hydraulic selector (14) similarly opens the second hydraulic selector and top layer hydraulic selector, recovers the oil and grasps convenient for subsequent hierarchy Make;
Preferably, in the upper operation for mentioning cement injection core pipe (46) and circulation pipe string of giving up (45), circulation pipe string of giving up (45) is driven It is mobile to seal sliding sleeve (49), and then the unlatching ring (50) of the first mechanical switch (12) is opened, similarly, opens the second machinery and opens It closes.
Preferably, the left end of the blind plugging (1) of sidetracking well cementation tubing string passes through well cementation cement injection pipe nipple (2) connection the first well cementation oil pipe (11), the outside of the first well cementation oil pipe (11), which is equipped with, successively installs self-styled (8), hydro-expansive rubber (9) and K344 to a left side by right Packer (10), and the first well cementation oil pipe (11) is equipped with the first cement injection mouth (4) and first circulation hole (6);First well cementation oil pipe (11) upper end is sequentially connected the first mechanical switch (12), the first hydraulic selector (14) and the first signaling switch (18), the first letter Number switch (18) left end connection second well cementation oil pipe (27), and second well cementation oil pipe (27) on the outside of be sequentially installed with first point Layer self-styled (19), first layer water-swellable self-styled (20) and first layer K344 packer (21), and it is solid second The second cement injection mouth (23) and second circulation hole (24) are equipped in the middle part of well oil pipe (27), the left part of the second well cementation oil pipe (27) is successively The second mechanical switch (31), the second hydraulic selector (32) and second signal switch (33) are connected, second signal switchs the left side of (33) End connection top tiltedly well cementation oil pipe, and top tiltedly cement the well oil pipe right end outer wall be successively arranged third layering with self-styled (34), Third layering uses K344 packer (36) with hydro-expansive rubber (35), third layering, and tiltedly the cement the well middle part of oil pipe of top is equipped with Top layer cement injection mouth and top-level cycle hole, tiltedly the cement the well left end of oil pipe of top is connected to former casing (47), so that it is solid to form sidetracking Well casing column.
Preferably, above-mentioned circulation pipe string of giving up (45) passes through former casing (47), hanger (43) and finder (44) Tripping in sidetracking well cementation tubing string inner cavity, and the right part of circulation pipe string of giving up (45) connects multiple cement injections and seals sliding sleeves, realizes cooperation Close the first cement injection mouth (4) and first circulation hole (6) and the second cement injection mouth (23), second circulation hole (24) and top layer cement injection Mouth and top-level cycle hole.
The beneficial effects of the present invention are: the present invention utilizes the open-hole of sidetracked hole, hydraulic selector, signaling switch and machinery are opened Pass etc. directly during well cementation, is added to onto the well bore of sidetracked hole, so that sidetracked hole well cementation tubing string be made to have layering The function of oil recovery;And the present invention realizes layering cement injection well cementation successively to underground portion, well middle part, the cement injection well cementation step by step of well middle and upper part; Layer and section well cementation after the completion of, by above mention cement injection core pipe and give up circulation pipe string can be by hydraulic selector, signaling switch and machine Tool switch is in place, is convenient for subsequent oil production by layer.In addition, the present invention devises the parallel packing mode of three-level, i.e., for safety Using self-styled, hydro-expansive rubber, K344 packer, K344 packer set, water-swellable can be made by hydraulic mode Rubber be then under lower going-into-well after can encounter water and expand and further realize packing, to ensure that the independent behaviour of each oil reservoir Make, the safety operation of the oil production by layer after ensure that well cementation.Furthermore the technique that the present invention uses can simply be thrown by ground Enter steel ball, suppress the layer and section well cementation that multiple oil reservoirs can be realized, by above proposing cement injection core pipe and circulation pipe string of giving up Hydraulic selector, signaling switch and mechanical switch is in place, it is convenient for subsequent oil production by layer, entire technique and easy to operate is convenient for Implement, and solves the problems, such as the restricted diameter in sidetracking hole.
Detailed description of the invention
Attached drawing 1 is the structural schematic diagram of left-half of the invention;
Attached drawing 2 is the structural schematic diagram of right half part of the invention;
Attached drawing 3 is the structural schematic diagram of mortar injector;
Attached drawing 4 is the structural schematic diagram of hydraulic selector;
Attached drawing 5 is the structural schematic diagram of mechanical switch;
In upper figure: blind plugging (1), well cementation cement injection pipe nipple (2), cement injection sealing sliding sleeve (3), the first cement injection mouth (4), sealing rubber ring (5), Circulation port (6), mortar injector (7), self-styled (8), hydro-expansive rubber (9), K344 packer (10), well cementation oil pipe (11), First mechanical switch (12), program open set (13), the first hydraulic selector (14), overcurrent connector sleeve (15), setting sealing-plug (16), cement injection core pipe (17), the first signaling switch (18), first layer are self-styled with self-styled (19), first layer water-swellable (20), first layer K344 packer (21), first layer mortar injector (22), first layer cement injection mouth (23), First layer circulation port (24), first layer cement injection shear pin (25), small sealed ball seat (26), the second well cementation oil pipe (27) (27), second layering with self-styled (28), second layering with hydro-expansive rubber (29), second layering use K344 packer (20), Second mechanical switch (31), the second hydraulic selector (32), second signal switch (33), third layering self-styled (34), third point Layer with hydro-expansive rubber (35), third layering with K344 packer (36), top layer Cemeneting device (37), big sealed ball seat (38), Top layer sliding sleeve (39), top layer hydro-expansive rubber (40), top layer K344 packer (41), top layer self-styled (42), hanger (43), Finder (44), circulation pipe string of giving up (45), cement injection core pipe (46), former casing (47), mechanical switch ontology (48), sealing are slided Cover (49), open ring (50), close ring (51), reinforcing shear pin (52), support ring (53), cement injection shear pin (54), in hydraulic selector Heart pipe (55), commutation hole (56), inlet opening (57), balance hole (58), hydraulic selector reinforce shear pin (59), support ring (60).
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
Referring to attached Fig. 1 and 2, a kind of sidetracked hole layer and section cementing unit that the present invention mentions, technical solution is: including Blind plugging (1), well cementation cement injection pipe nipple (2), cement injection seal sliding sleeve (3), the first cement injection mouth (4), sealing rubber ring (5), first circulation hole (6), the first mortar injector (7), self-styled (8), hydro-expansive rubber (9), K344 packer (10), the first well cementation oil pipe (11), the first mechanical switch (12), program open set (13), the first hydraulic selector (14), overcurrent connector sleeve (15), setting sealing Fill in (16), cement injection core pipe (17), the first signaling switch (18), first layer with self-styled (19), first layer water-swellable oneself Seal (20), first layer K344 packer (21), layering mortar injector (22), the second cement injection mouth (23), second circulation Hole (24), first layer cement injection shear pin (25), small sealed ball seat (26), the second well cementation oil pipe (27), second are layered with self-styled (28), the second layering is with hydro-expansive rubber (29), the second layering with K344 packer (30), the second mechanical switch (31), the Two hydraulic selectors (32), second signal switch (33), third layering use hydro-expansive rubber with self-styled (34), third layering (35), third layering K344 packer (36), top layer Cemeneting device (37), big sealed ball seat (38), top layer sliding sleeve (39), top layer Hydro-expansive rubber (40), top layer self-styled (42), hanger (43), finder (44), is given up and is followed at top layer K344 packer (41) The left end of endless tube column (45), cement injection core pipe (46), former casing (47), the blind plugging (1) passes through well cementation cement injection pipe nipple (2) connection First well cementation oil pipe (11), the outside of the first well cementation oil pipe (11), which is equipped with, successively installs self-styled (8), water-swellable rubber to a left side by right Glue (9) and K344 packer (10), and the first well cementation oil pipe (11) is equipped with the first cement injection mouth (4) and first circulation hole (6);The The upper end of one well cementation oil pipe (11) is sequentially connected the first mechanical switch (12), the first hydraulic selector (14) and the first signaling switch (18), the second well cementation oil pipe (27) of left end connection of the first signaling switch (18), and the outside of the second well cementation oil pipe (27) is successively First layer self-styled (19), first layer water-swellable self-styled (20) and first layer K344 packer are installed (21), the second cement injection mouth (23) and second circulation hole (24), the second well cementation oil pipe and in the middle part of the second well cementation oil pipe (27) are equipped with (27) left part is sequentially connected the second mechanical switch (31), the second hydraulic selector (32) and second signal and switchs (33), and second The oblique well cementation oil pipe in the left part connection top of signaling switch (33), and tiltedly the cement the well right end outer wall of oil pipe of top is successively arranged third Layering uses K344 packer (36) with hydro-expansive rubber (35), third layering with self-styled (34), third layering, and top is tiltedly cemented the well The middle part of oil pipe is equipped with top layer cement injection mouth and top-level cycle hole, and tiltedly the cement the well left end of oil pipe of top is connected to former casing (47), To form sidetracking well cementation tubing string;
The circulation pipe string of giving up (45) passes through former casing (47), hanger (43) and the well cementation of finder (44) tripping in sidetracking Tubing string inner cavity, and the right part of circulation pipe string of giving up (45) connects multiple cement injections and seals sliding sleeve, realizes that the first cement injection is closed in cooperation Mouth (4) and first circulation hole (6) and the second cement injection mouth (23), second circulation hole (24) and top layer cement injection mouth and top-level cycle Hole;
Cement injection core pipe (46) are equipped in the inner cavity of circulation pipe string of giving up (45), are equipped in the right part of cement injection core pipe (46) setting close Blocking (16) can push it to right part by suppressing, to open the first cement injection mouth (4) and first circulation hole (6), and right The well cementation of first layer cement injection;First layer cement injection shear pin (25) and small sealed ball seat are equipped at the middle part of cement injection core pipe (46) (26), can be setting by small sealed ball seat (26) by investment small ball, it suppresses and cuts first layer cement injection shear pin (25), To which small sealed ball seat (26) is pushed at the limited block of right end, so that the second cement injection mouth (23), second circulation hole (24) are opened, And it cements the well to second layer cement injection;And the cement injection core pipe (46) is located at the position that top is tiltedly cemented the well at oil pipe and is equipped with big ball sealer Seat (38) is suppressed after putting into big steel ball, big sealed ball seat (38) is pushed into right side, to open top layer cement injection mouth and top-level cycle Hole, and cement the well to top layer cement injection, and then realize layering cement injection and well cementation.
It should be noted that the length of horizontal direction of the invention is longer, therefore, Fig. 1 is broken down into when submitting attached drawing And Fig. 2, and in normal use, it needs to combine Fig. 1 and Fig. 2, as whole device figure.
Referring to attached drawing 3, the right part inner wall of well cementation cement injection pipe nipple (2) of the invention is equipped with limiting groove, in limiting groove Cement injection sealing sliding sleeve (3) is installed, cement injection sealing sliding sleeve (3) passes through reinforcing shear pin (52) and the first mortar injector (7) it connects, the through-hole side of the first mortar injector (7) is corresponding with well cementation cement injection pipe nipple (2), the other side and cement injection core The cement injection through-hole for managing (46) is corresponding.
Preferably, above-mentioned cement injection core pipe (46) inner wall is sealed blocking (16) by cement injection shear pin (54) attachment base, passes through The outer wall of setting sealing-plug (16) blocks the cement injection through-hole of cement injection core pipe (46);The left part of the setting sealing-plug (16) is set There is ball seat, it can be setting on ball seat by investment small ball.
Wherein, the inner wall of well cementation cement injection pipe nipple (2) is equipped with preformed groove A, and the outer right wall of cement injection sealing sliding sleeve (3) is set There are support ring (53), after cement injection sealing sliding sleeve (3) is moved to the left, cooperated by support ring (53) and preformed groove, thus will note Ash sealing sliding sleeve (3) is tightly attached to the inner wall of well cementation cement injection pipe nipple (2), and the first cement injection mouth (4) is closed.
Referring to attached drawing 4, the first hydraulic selector (14) of the invention include hydraulic selector central tube (55), commutation hole (56), Inlet opening (57), balance hole (58), hydraulic selector reinforce shear pin (59), support ring (60), preformed groove A, at hydraulic selector center Commutation hole (56), inlet opening (57) and balance hole (58) are successively arranged on the right side of pipe (55), in hydraulic selector central tube (55) Left side is equipped with preformed groove A, and set (13) is opened by program in the inside of commutation hole (56), inlet opening (57) and balance hole (58) It blocks, and described program opens the left end of set (13) equipped with support ring (60), the right side of support ring (60) is equipped with reinforcing shear pin (52), program is opened set (13) by reinforcing shear pin (52) to connect with overcurrent connector sleeve (15), the overcurrent connector sleeve (15) It is fixed on the outer wall of circulation pipe string of giving up (45), when circulation pipe string of giving up (45) is to outside upper mention, is utilized overcurrent connector sleeve (15) Band dynamic program opens set (13) and above proposes movement, and opens commutation hole (56), inlet opening (57) and balance hole (58).
Wherein, the aperture of inlet opening (57) is greater than the aperture of commutation hole (56), and the aperture of commutation hole (56) is greater than balance hole (58) aperture.
In addition, it is necessary to explanation: the structure and the first hydraulic selector of the hydraulic selector of the second hydraulic selector 32 and top layer It is identical.
Referring to attached drawing 5, the first mechanical switch (12) of the invention include mechanical switch ontology (48), sealing sliding sleeve (49), It opens ring (50), close ring (51), the both ends of the mechanical switch ontology (48) are equipped with connector, and between two connectors Mechanical switch ontology is equipped with major diameter limit chamber, and major diameter limit chamber is equipped with fluid hole and preformed groove C, limits in the major diameter Inside installation sealing sliding sleeve (49) of position chamber is opened in the outer wall of sealing sliding sleeve (49) equipped with opening ring (50) and closing ring (51) Qi Huan (50) and closing ring (51) realize the open and close of fluid hole by the cooperation with preformed groove C.In addition, second is mechanical The structure of the mechanical switch of switch 31 and top layer is identical as the structure of the first mechanical switch, is no longer described in detail.
In addition, being equipped with small sealed ball seat (26) at the middle part of cement injection core pipe (46), the cement injection core pipe referring to attached drawing 1 (46) it is located at the position that top is tiltedly cemented the well at oil pipe and is equipped with big sealed ball seat (38), the internal diameter of the big sealed ball seat (38) is greater than The outer diameter of small ball, small ball can pass through big sealed ball seat (38) and drop on small sealed ball seat (26).
In addition, the first signaling switch (18) and second signal switch (33) use ball-and-seat, for limiting strata pressure.
The application method for the sidetracked hole layer and section cementing unit that the present invention mentions, comprising the following steps:
1, the first step requires in the former casing (47) of oil well according to well-log information, and tripping in finder (44) carries out sidetracking Well, and continue lateral or oblique drill out open hole;Then, entire sidetracked hole layer and section cementing unit is assembled on ground, directly will It whole sidetracking well cementation tubing string, cement injection core pipe and gives up in circulation pipe string tripping in open hole, wherein sidetracking tubing string of cementing the well includes blind plugging (1), it cements the well cement injection pipe nipple (2), the first well cementation oil pipe (11), the first mechanical switch (12), the first hydraulic selector (14) and first Signaling switch (18), the second well cementation oil pipe (27), the second mechanical switch (31), the second hydraulic selector (32) and second signal switch (33) it tiltedly cements the well oil pipe with top, each oil reservoir is separated by self-styled, hydro-expansive rubber, K344 packer, at this point, One cement injection mouth (4) and first circulation hole (6) and the second cement injection mouth (23), second circulation hole (24) and top layer cement injection mouth and top Layer circulation port is respectively at closed state;
2, second step is suppressed downwards by cement injection core pipe (46), and setting sealing-plug (16) is hit down, it is made to fall into mortar injector (7) then bottom, in terrestrial operation, passes through note so that the first cement injection mouth (4) of setting sealing-plug (16) barrier be opened Mortar is slowly injected into and through the first cement injection mouth (4) and is injected into stratum by grey core pipe (46), is formed the first cement injection layer, is worked as earth's surface Pressure stop cement injection when rising to design pressure 15-25MPa of value, and pass through cement injection core pipe (46) and circulation pipe string of giving up (45) Between annular space carry out anti-flushing well, cement injection core pipe is cleaned up, until ground liquid outlet be clear water until, i.e., completion first The cement injection process of cement injection layer;
3, third step puts into small ball, small ball into cement injection core pipe on ground after the completion of the cement injection process of the first cement injection layer It drops on small sealed ball seat (26), small sealed ball seat (26) is set, then suppressed along cement injection core pipe, at this point, connection The cement injection shear pin of small sealed ball seat is cut, so that small sealed ball seat (26) be made to fall on the limited block of lower right, will be obstructed The second cement injection mouth (23) open, at this point, due to being equipped with first layer self-styled (19), first point on the right side of the second cement injection mouth (23) Layer water-swellable self-styled (20) and first layer K344 packer (21), the second cement injection mouth (23) left side are equipped with the second layering K344 packer (30) are used with hydro-expansive rubber (29) and the second layering with self-styled (28), the second layering;So passing through ground The mortar of injection is injected into the second cement injection layer by cement injection core pipe (46) by the second cement injection mouth (23), when the pressure liter of earth's surface When to design pressure 15-25MPa of value, stop cement injection, and pass through the ring between cement injection core pipe (46) and circulation pipe string of giving up (45) Sky carries out anti-flushing well, and cement injection core pipe is cleaned up, and until the liquid outlet on ground is clear water, that is, completes the second cement injection layer Cement injection process;
4, the 4th step puts into big steel ball, big steel into cement injection core pipe after the completion of the cement injection process of the second cement injection layer, then from ground Ball drops on big sealed ball seat (38) along cement injection core pipe, and big sealed ball seat (38) is set, then is suppressed, at this point, even The top layer shear pin for connecing answer sealed ball seat is cut, thus fall to big sealed ball seat (38) on the limited block of lower right, it will The top layer cement injection mouth of barrier is opened;At this point, being used due to being equipped with the second layering on the right side of top layer cement injection mouth with self-styled (28), the second layering K344 packer (30) are used in hydro-expansive rubber (29) and the second layering, and the left side of top layer cement injection mouth is equipped with third and is layered with self-styled (34), third layering uses K344 packer (36) with hydro-expansive rubber (35) and third layering;So injected by ground Mortar is injected into third cement injection layer by cement injection core pipe (46) by top layer cement injection mouth, when the pressure of earth's surface rises to design pressure When 15-25MPa of value, stop cement injection, and backwash is carried out by the annular space between cement injection core pipe (46) and circulation pipe string of giving up (45) Well cleans up cement injection core pipe, until the liquid outlet on ground is clear water, that is, completes the cement injection process of third cement injection layer;
5, the 5th step carries out operation of giving up after the completion of cement injection, is followed by above proposing cement injection core pipe (46) in ground well head and giving up Endless tube column (45) is proposed former casing (47), completes layer and section cementing operation.
6, wherein, in the upper operation for mentioning cement injection core pipe (46) and circulation pipe string of giving up (45), due to circulation pipe string of giving up (45) right end be connected with cement injection sealing sliding sleeve (3), after above mentioning, cut reinforcing shear pin (52), cement injection seal sliding sleeve (3) along It cements the well into the limiting groove movement of grey pipe nipple (2) inner wall, and is cooperated by support ring (53) and preformed groove A, to lock cement injection It seals sliding sleeve (3), and the first cement injection mouth (4) and first circulation hole (6) is closed;Similarly, cement injection shear pin (25) have been cut, also will Second cement injection mouth (23) and second circulation hole (24) are closed;Similarly, top layer cement injection mouth and top-level cycle hole are closed;
7, in the upper operation for mentioning cement injection core pipe (46) and circulation pipe string of giving up (45), circulation pipe string of giving up (45) drives overcurrent to connect Female connector (15) is mobile, and overcurrent connector sleeve (15) is mobile by hydraulic selector reinforcing shear pin (59) band dynamic program unlatching set (13), from And commutation hole (56), inlet opening (57) and the balance hole (58) of the first hydraulic selector (14) are opened, and program opens set (13) Program is opened into the left side that set (13) is fixed on hydraulic selector central tube (55) by support ring (60), realizes the first hydraulic selector (14) unlatching similarly opens the second hydraulic selector and top layer hydraulic selector, is convenient for subsequent hierarchy oil-recovery operations;
8, in the upper operation for mentioning cement injection core pipe (46) and circulation pipe string of giving up (45), circulation pipe string of giving up (45) band dynamic sealing is sliding It is mobile to cover (49), and then the unlatching ring (50) of the first mechanical switch (12) is opened, similarly, opens the second mechanical switch.
The above, is only part preferred embodiment of the invention, and anyone skilled in the art may benefit Equivalent technical solution is modified or is revised as with the technical solution of above-mentioned elaboration.Therefore, technology according to the present invention Any simple modification or substitute equivalents that scheme is carried out, belong to the greatest extent the scope of protection of present invention.

Claims (6)

1. a kind of application method of sidetracked hole layer and section cementing unit, it is characterized in that: the following steps are included:
The first step requires in the former casing (47) of oil well according to well-log information, and tripping in finder (44) carries out sidetracked hole, And continues lateral or oblique drill out open hole;Then, entire sidetracked hole layer and section cementing unit is assembled on ground, it directly will be whole Sidetracking well cementation tubing string, cement injection core pipe and give up in circulation pipe string tripping in open hole, wherein sidetracking well cementation tubing string include blind plugging (1), Well cementation cement injection pipe nipple (2), the first well cementation oil pipe (11), the first mechanical switch (12), the first hydraulic selector (14) and the first signal Switch (18), the second well cementation oil pipe (27), the second mechanical switch (31), the second hydraulic selector (32) and second signal switch (33) It tiltedly cements the well oil pipe with top, each oil reservoir is separated by self-styled, hydro-expansive rubber, K344 packer, at this point, the first note Grey mouth (4) and first circulation hole (6) and the second cement injection mouth (23), second circulation hole (24) and top layer cement injection mouth and top layer follow Annular distance is respectively at closed state;
Second step is suppressed downwards by cement injection core pipe (46), and setting sealing-plug (16) is hit down, it is made to fall into mortar injector (7) then bottom, in terrestrial operation, passes through note so that the first cement injection mouth (4) of setting sealing-plug (16) barrier be opened Mortar is slowly injected into and through the first cement injection mouth (4) and is injected into stratum by grey core pipe (46), is formed the first cement injection layer, is worked as earth's surface Pressure stop cement injection when rising to design pressure 15-25MPa of value, and pass through cement injection core pipe (46) and circulation pipe string of giving up (45) Between annular space carry out anti-flushing well, cement injection core pipe is cleaned up, until ground liquid outlet be clear water until, i.e., completion first The cement injection process of cement injection layer;
Third step puts into small ball into cement injection core pipe on ground, small ball is suitable after the completion of the cement injection process of the first cement injection layer Cement injection core pipe drop on small sealed ball seat (26), small sealed ball seat (26) is set, then is suppressed, at this point, connection it is small The cement injection shear pin of sealed ball seat is cut, to make small sealed ball seat (26) fall on the limited block of lower right, by barrier Second cement injection mouth (23) is opened, at this point, due to being equipped with first layer self-styled (19), first layer on the right side of the second cement injection mouth (23) With water-swellable self-styled (20) and first layer K344 packer (21), the second cement injection mouth (23) left side is equipped with the second layering and uses Self-styled (28), the second layering use K344 packer (30) with hydro-expansive rubber (29) and the second layering;So being infused by ground The mortar entered is injected into the second cement injection layer by cement injection core pipe (46) by the second cement injection mouth (23), when the pressure of earth's surface rises to When design pressure 15-25MPa of value, stop cement injection, and pass through the annular space between cement injection core pipe (46) and circulation pipe string of giving up (45) Anti-flushing well is carried out, cement injection core pipe is cleaned up, until the liquid outlet on ground is clear water, that is, completes the note of the second cement injection layer Ash process;
4th step puts into big steel ball, big steel ball into cement injection core pipe after the completion of the cement injection process of the second cement injection layer, then from ground It drops on big sealed ball seat (38), big sealed ball seat (38) is set, then suppressed along cement injection core pipe, at this point, connection The top layer shear pin for replying sealed ball seat is cut, so that big sealed ball seat (38) be made to fall on the limited block of lower right, will be hindered Every top layer cement injection mouth open;At this point, being used and being met with self-styled (28), the second layering due to being equipped with the second layering on the right side of top layer cement injection mouth K344 packer (30) are used in water-expansible rubber (29) and the second layering, and the left side of top layer cement injection mouth is equipped with third and is layered with self-styled (34), third layering uses K344 packer (36) with hydro-expansive rubber (35) and third layering;So injected by ground Mortar is injected into third cement injection layer by cement injection core pipe (46) by top layer cement injection mouth, when the pressure of earth's surface rises to design pressure When 15-25MPa of value, stop cement injection, and backwash is carried out by the annular space between cement injection core pipe (46) and circulation pipe string of giving up (45) Well cleans up cement injection core pipe, until the liquid outlet on ground is clear water, that is, completes the cement injection process of third cement injection layer;
5th step carries out operation of giving up after the completion of cement injection, by above proposing cement injection core pipe (46) and circulation of giving up in ground well head Tubing string (45) is proposed former casing (47), completes layer and section cementing operation.
2. the application method of sidetracked hole layer and section cementing unit according to claim 1, it is characterized in that: proposing cement injection upper In the operation of core pipe (46) and circulation pipe string of giving up (45), since the right end of circulation pipe string of giving up (45) is connected with cement injection sealing Sliding sleeve (3) after above mentioning, cuts reinforcing shear pin (52), and cement injection seals sliding sleeve (3) along the limit cemented the well into grey pipe nipple (2) inner wall Groove is mobile, and is cooperated by support ring (53) and preformed groove A, to lock cement injection sealing sliding sleeve (3), and by the first cement injection mouth (4) it is closed with first circulation hole (6);Similarly, cement injection shear pin (25) have been cut, also by the second cement injection mouth (23) and second circulation hole (24) it closes;Similarly, top layer cement injection mouth and top-level cycle hole are closed.
3. the application method of sidetracked hole layer and section cementing unit according to claim 1, it is characterized in that: proposing cement injection upper In the operation of core pipe (46) and circulation pipe string of giving up (45), circulation pipe string of giving up (45) drives overcurrent connector sleeve (15) mobile, mistake Stream connector sleeve (15) reinforces shear pin (59) band dynamic program by hydraulic selector and opens set (13) movement, opens so that opening first is hydraulic Commutation hole (56), inlet opening (57) and the balance hole (58) of (14) are closed, and program unlatching set (13) will by support ring (60) Program opens the left side that set (13) is fixed on hydraulic selector central tube (55), realizes the unlatching of the first hydraulic selector (14), similarly, The second hydraulic selector and top layer hydraulic selector are opened, subsequent hierarchy oil-recovery operations are convenient for.
4. the application method of sidetracked hole layer and section cementing unit according to claim 1, it is characterized in that: proposing cement injection upper In the operation of core pipe (46) and circulation pipe string of giving up (45), circulation pipe string of giving up (45) band dynamic sealing sliding sleeve (49) is mobile, in turn The unlatching ring (50) of first mechanical switch (12) is opened, similarly, opens the second mechanical switch.
5. the application method of sidetracked hole layer and section cementing unit according to claim 1, it is characterized in that: sidetracking well cementing pipe The left end of the blind plugging (1) of column passes through well cementation cement injection pipe nipple (2) connection first and cements the well oil pipe (11), outside the first well cementation oil pipe (11) Side, which is equipped with, successively installs self-styled (8), hydro-expansive rubber (9) and K344 packer (10), and the first well cementation oil pipe to a left side by right (11) the first cement injection mouth (4) and first circulation hole (6) are equipped with;The upper end of first well cementation oil pipe (11) is sequentially connected the first machinery (12), the first hydraulic selector (14) and the first signaling switch (18) are switched, the left end connection second of the first signaling switch (18) is solid Well oil pipe (27), and be sequentially installed with first layer on the outside of the second well cementation oil pipe (27) and met with self-styled (19), first layer Water expands self-styled (20) and first layer with K344 packer (21), and equipped with the second cement injection in the middle part of the second well cementation oil pipe (27) The left part of mouth (23) and second circulation hole (24), the second well cementation oil pipe (27) is sequentially connected the second mechanical switch (31), second Hydraulic selector (32) and second signal switch (33), second signal switch the oblique well cementation oil pipe in left part connection top of (33), and Top tiltedly cement the well oil pipe right end outer wall be successively arranged third layering with self-styled (34), third be layered use hydro-expansive rubber (35), third layering use K344 packer (36), top tiltedly cement the well oil pipe middle part be equipped with top layer cement injection mouth and top-level cycle hole, Tiltedly the cement the well left end of oil pipe of top is connected to former casing (47), to form sidetracking well cementation tubing string.
6. the application method of sidetracked hole layer and section cementing unit according to claim 1, it is characterized in that: described gives up Circulation pipe string (45) passes through former casing (47), hanger (43) and finder (44) tripping in sidetracking well cementation tubing string inner cavity, and loses The right part of hand circulation pipe string (45) connects multiple cement injections and seals sliding sleeve, realizes that cooperation is closed the first cement injection mouth (4) and first and followed Annular distance (6) and the second cement injection mouth (23), second circulation hole (24) and top layer cement injection mouth and top-level cycle hole.
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CN109723411A (en) * 2019-01-07 2019-05-07 王皓 Sidetracked hole layering pumping unit
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