CN108979583B - Sidetracking well layering and segmenting cementing device and using method - Google Patents
Sidetracking well layering and segmenting cementing device and using method Download PDFInfo
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- CN108979583B CN108979583B CN201810765671.5A CN201810765671A CN108979583B CN 108979583 B CN108979583 B CN 108979583B CN 201810765671 A CN201810765671 A CN 201810765671A CN 108979583 B CN108979583 B CN 108979583B
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000002347 injection Methods 0.000 claims abstract description 231
- 239000007924 injection Substances 0.000 claims abstract description 231
- 238000007789 sealing Methods 0.000 claims abstract description 118
- 239000004568 cement Substances 0.000 claims abstract description 33
- 238000005553 drilling Methods 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 18
- 239000010959 steel Substances 0.000 claims abstract description 18
- 238000003825 pressing Methods 0.000 claims abstract description 13
- 230000008961 swelling Effects 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 20
- 239000004570 mortar (masonry) Substances 0.000 claims description 14
- 238000005406 washing Methods 0.000 claims description 6
- 210000002445 nipple Anatomy 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- 239000003129 oil well Substances 0.000 claims description 3
- 230000011218 segmentation Effects 0.000 claims 5
- 238000000926 separation method Methods 0.000 claims 1
- 238000000605 extraction Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention relates to a sidetracking well layering and segmenting cementing device and a using method thereof. The technical scheme is as follows: the left end of the blind plug is connected with a first well cementation oil pipe through a well cementation ash injection short section, a self-sealing, a water swelling rubber and a K344 packer are sequentially arranged on the outer side of the first well cementation oil pipe, and an ash injection port and a circulation hole are formed in the first well cementation oil pipe; the upper end of the first well cementation oil pipe is sequentially connected with the mechanical switch, the hydraulic switch and the signal switch, the left end of the signal switch is connected with the second well cementation oil pipe, a side drilling well cementation tubular column of a plurality of oil production layers is formed, and layered cement injection and well cementation are achieved. The beneficial effects are that: the process adopted by the invention can realize the layered and segmented well cementation of a plurality of oil layers by simply putting steel balls into the ground and pressing, and can place the hydraulic switch, the signal switch and the mechanical switch by lifting the ash core injection pipe and the releasing circulation pipe column, thereby facilitating the subsequent layered oil extraction.
Description
Technical Field
The invention relates to a side drilling well cementation device for an oil and gas field and a using method, in particular to a side drilling layered segmented well cementation device and a using method.
Background
In the process of exploiting oil and gas fields, a large number of waste gas wells (i.e. wells without exploitation value) exist, good wells exist nearby the wells, a large number of unexplored oil and gas reservoirs exist, and in order to save resources and save exploitation cost, a side drilling mode is generally adopted for an oil operation party, and the side drilling technology is a whole set of process technology of fixing a whipstock at a certain specific depth of an oil and water well, utilizing the inclined plane deflecting and deflecting functions of the whipstock, windowing the side surface of a casing by using a milling cone, drilling a new well hole from a window, and then lowering a tail pipe to fix a well.
In addition, many of the side-drilling wells are multi-level, and the technical parameters of the multi-level reservoirs are often different, such as some levels have high water content, some levels have high oil content, but the formation energy is poor, so it is necessary and beneficial if the layered oil recovery can be realized.
In the process of separate layer exploitation, the structure of the required tools is complex, so that the inner drift diameter of a pipe column is influenced, the inner diameter of the pipe column is just an important parameter in oil exploitation, and the diameter of a side drilling hole is a limited parameter due to the adoption of a side drilling process. The invention is designed to solve the problem.
Disclosure of Invention
The invention aims to provide a lateral well layering and segmenting cementing device and a using method thereof aiming at the defects in the prior art.
The invention provides a using method of a sidetracking well layering and segmenting cementing device, which adopts the technical scheme that: the method comprises the following steps:
firstly, a directional device (44) is put into a raw well casing (47) of an oil well to perform sidetrack drilling according to the requirement of logging information, and an open hole is drilled transversely or obliquely; then, assembling the whole side drilling layered segmented well cementation device on the ground, and directly putting the whole side drilling well cementation pipe column, a cement injection core pipe and a release circulation pipe column into a bare well, wherein the side drilling well cementation pipe column comprises a blind plug (1), a well cementation cement short section (2), a first well cementation oil pipe (11), a first mechanical switch (12), a first hydraulic switch (14), a first signal switch (18), a second well cementation oil pipe (27), a second mechanical switch (31), a second hydraulic switch (32), a second signal switch (33) and a top inclined well cementation oil pipe, all oil layers are separated by self-sealing, water swelling rubber and a K344 packer, and at the moment, the first cement injection port (4) and the first circulation hole (6), and the second cement injection port (23), the second circulation hole (24), the top cement injection port and the top circulation hole are respectively in a closed state;
secondly, downwards pressing the ash injection core pipe (46), dropping the setting sealing plug (16) to the bottom of the ash injection device (7), so as to open a first ash injection port (4) blocked by the setting sealing plug (16), then, operating on the ground, slowly injecting the ash into the stratum through the ash injection core pipe (46) and injecting the ash into the stratum through the first ash injection port (4) to form a first ash injection layer, stopping injecting ash when the pressure on the ground surface is increased to a designed pressure value of 15-25 MPa, reversely washing the well through an annular space between the ash injection core pipe (46) and a releasing circulation pipe column (45), and cleaning the ash injection core pipe until a liquid outlet on the ground is clean water, thus finishing the ash injection process of the first ash injection layer;
thirdly, after the ash injection procedure of the first ash injection layer is completed, small steel balls are put into the ash injection core pipe from the ground, the small steel balls fall onto a small sealing ball seat (26) along the ash injection core pipe, the small sealing ball seat (26) is set and sealed, then pressing is carried out, at the moment, an ash injection shear pin connected with the small sealing ball seat is cut off, so that the small sealing ball seat (26) falls onto a limiting block on the lower right side, and a second ash injection port (23) which is blocked is opened, at the moment, because a first layering self-sealing (19), a first layering water-swelling rubber (20) and a first layering K344 packer (21) are arranged on the right side of the second ash injection port (23), a second layering self-sealing (28), a second layering water-swelling rubber (29) and a second layering K344 packer (30) are arranged on the left side of the second ash injection port (23); therefore, mortar injected through the ground is injected into a second ash injection layer through the second ash injection port (23) through the ash injection core pipe (46), when the pressure of the ground surface rises to the design pressure value of 15-25 MPa, the ash injection is stopped, the well is back-washed through the annular space between the ash injection core pipe (46) and the releasing circulation pipe column (45), the ash injection core pipe is cleaned until the liquid outlet on the ground is clean water, and the ash injection process of the second ash injection layer is completed;
fourthly, after the ash injection procedure of the second ash injection layer is completed, large steel balls are thrown into the ash injection core pipe from the ground, the large steel balls fall onto the large sealing ball seats (38) along the ash injection core pipe, the large sealing ball seats (38) are set and sealed, pressing is carried out, and at the moment, top shear pins connected with the reply sealing ball seats are cut off, so that the large sealing ball seats (38) fall onto a limiting block at the lower right side, and the blocked ash injection port at the top layer is opened; at the moment, a second self-sealing for layering (28), a water-swelling rubber for layering (29) and a K344 packer (30) are arranged on the right side of the top-layer ash injection port, and a third self-sealing for layering (34), a water-swelling rubber for layering (35) and a K344 packer (36) for layering are arranged on the left side of the top-layer ash injection port; therefore, mortar injected through the ground is injected into a third ash injection layer through the ash injection core pipe (46) through the top ash injection port, when the pressure on the ground surface rises to the designed pressure value of 15-25 MPa, the ash injection is stopped, the reverse well washing is carried out through the annular space between the ash injection core pipe (46) and the releasing circulation pipe column (45), the ash injection core pipe is cleaned until the liquid outlet on the ground is clean water, and the ash injection process of the third ash injection layer is completed;
fifthly, after the cement injection is finished, releasing operation is carried out, and the cement core pipe (46) and the releasing circulation pipe column (45) are lifted out of the original well casing (47) through lifting the cement core pipe and the releasing circulation pipe column on the ground well head, so that layered segmented well cementation construction is completed.
Preferably, in the operation of lifting the ash injection core pipe (46) and the releasing circulation pipe column (45), as the rightmost end of the releasing circulation pipe column (45) is connected with the ash injection sealing sliding sleeve (3), after lifting, a stress application shear pin (52) is cut off, the ash injection sealing sliding sleeve (3) moves along a limiting groove on the inner wall of the cementing ash inlet short section (2) and is matched with the reserved groove A through a supporting ring (53), so that the ash injection sealing sliding sleeve (3) is locked, and the first ash injection port (4) and the first circulation hole (6) are closed; in the same way, the ash injection shear pin (25) is sheared, and the second ash injection port (23) and the second circulation hole (24) are also closed; in the same way, the top layer ash injection port and the top layer circulation hole are closed.
Preferably, in the operation of lifting the ash injection core pipe (46) and the releasing circulation pipe column (45), the releasing circulation pipe column (45) drives the overflowing connecting sleeve (15) to move, the overflowing connecting sleeve (15) drives the program opening sleeve (13) to move through a hydraulic switch stress application shear pin (59), so that a reversing hole (56), a liquid inlet hole (57) and a balance hole (58) of the first hydraulic switch (14) are opened, the program opening sleeve (13) fixes the program opening sleeve (13) on the left side of a hydraulic switch central pipe (55) through a support ring (60), the first hydraulic switch (14) is opened, and in the same way, the second hydraulic switch and the top layer hydraulic switch are opened, so that the subsequent layered oil extraction operation is facilitated;
preferably, in the operation of lifting the ash core pipe (46) and the releasing circulation pipe column (45), the releasing circulation pipe column (45) drives the sealing sliding sleeve (49) to move, so that the opening ring (50) of the first mechanical switch (12) is opened, and similarly, the second mechanical switch is opened.
Preferably, the left end of a blind plug (1) of the side drilling well cementation tubular column is connected with a first well cementation oil pipe (11) through a well cementation ash injection nipple (2), the outer side of the first well cementation oil pipe (11) is provided with a self-sealing device (8), a water swelling rubber (9) and a K344 packer (10) from right to left in sequence, and the first well cementation oil pipe (11) is provided with a first ash injection port (4) and a first circulation hole (6); the upper end of a first well cementation oil pipe (11) is sequentially connected with a first mechanical switch (12), a first hydraulic switch (14) and a first signal switch (18), the left end of the first signal switch (18) is connected with a second well cementation oil pipe (27), the outer side of the second well cementation oil pipe (27) is sequentially provided with a first layering self-sealing device (19), a first layering water-swelling rubber (20) and a first layering K344 packer (21), the middle of the second well cementation oil pipe (27) is provided with a second ash injection port (23) and a second circulation hole (24), the left end of the second well cementation oil pipe (27) is sequentially connected with a second mechanical switch (31), a second hydraulic switch (32) and a second signal switch (33), the left end of the second signal switch (33) is connected with a top inclined well cementation oil pipe, and the outer wall of the right end of the top inclined well cementation oil pipe is sequentially provided with a third layering self-sealing device (34), The third layering is with meeting water swelling rubber (35), the third layering is with K344 packer (36), and the middle part of top slant well cementation oil pipe is equipped with top layer notes ash hole and top layer circulation hole, and the left end of top slant well cementation oil pipe is connected to former well casing (47) to form sidetracking well cementation tubular column.
Preferably, the releasing circulation pipe column (45) is lowered into an inner cavity of a sidetrack cementing pipe column through a well casing (47), a hanger (43) and a direction finder (44), and the right end part of the releasing circulation pipe column (45) is connected with a plurality of ash injection sealing sliding sleeves, so that the first ash injection port (4) and the first circulation hole (6) are closed in a matched manner, and the second ash injection port (23), the second circulation hole (24), the top ash injection port and the top circulation hole are closed in a matched manner.
The invention has the beneficial effects that: according to the invention, a hydraulic switch, a signal switch, a mechanical switch and the like are directly added to the well body of the sidetracked well in the well cementation process by utilizing the bare hole of the sidetracked well, so that the sidetracked well cementing pipe column has the function of layered oil recovery; the invention sequentially injects cement to the lower part of the well, the middle part of the well and the upper part of the well step by step to realize layered cement injection and well cementation; after the layered and segmented well cementation is finished, the hydraulic switch, the signal switch and the mechanical switch can be put in place by lifting the cement core pipe and releasing the circulating pipe column, so that the subsequent layered oil extraction is facilitated. In addition, for safety, the invention designs a three-level parallel packing mode, namely a self-sealing, water-swelling rubber and a K344 packer are adopted, the K344 packer can be set and sealed in a hydraulic mode, and the water-swelling rubber can be swelled and further packed when meeting water after being put into the well, so that the independent operation of each oil layer is ensured, and the safe operation of the layered oil recovery after well cementation is ensured. Furthermore, the process adopted by the invention can realize the layered and segmented well cementation of a plurality of oil layers by simply putting steel balls into the ground and pressing, and can put the hydraulic switch, the signal switch and the mechanical switch in place by lifting the injection ash core pipe and the releasing circulation pipe column, thereby facilitating the subsequent layered oil extraction.
Drawings
FIG. 1 is a schematic structural view of the left half of the present invention;
FIG. 2 is a schematic structural view of the right half of the present invention;
FIG. 3 is a schematic view of the structure of a mortar injector;
FIG. 4 is a schematic diagram of the hydraulic switch;
FIG. 5 is a schematic diagram of a mechanical switch;
in the upper diagram: blind plug (1), well cementation ash injection short section (2), ash injection sealing sliding sleeve (3), first ash injection port (4), sealing rubber ring (5), circulation hole (6), mortar injector (7), self-sealing (8), water-swelling rubber (9), K344 packer (10), well cementation oil pipe (11), first mechanical switch (12), program opening sleeve (13), first hydraulic switch (14), overflowing connecting sleeve (15), seat sealing plug (16), ash injection core pipe (17), first signal switch (18), first layering self-sealing (19), first layering water-swelling rubber (20), first layering K344 packer (21), first layering mortar injector (22), first layering ash injection port (23), first layering circulation hole (24), first layering ash injection shear nail (25), small sealing ball seat (26), second well cementation oil pipe (27), A self-sealing device (28) for a second layer, water-swelling rubber (29) for the second layer, a K344 packer (20) for the second layer, a second mechanical switch (31), a second hydraulic switch (32), a second signal switch (33), a self-sealing device (34) for the third layer, water-swelling rubber (35) for the third layer, a K344 packer (36) for the third layer, a top-layer cement injector (37), a large sealing ball seat (38), a top-layer sliding sleeve (39), water-swelling rubber (40) for the top layer, a K344 packer (41), a top-layer self-sealing device (42), a hanger (43), an orientator (44), a releasing circulating pipe column (45), a cement injection core pipe (46), a well casing (47), a mechanical switch body (48), a sealing sliding sleeve (49), an opening ring (50), a closing ring (51), a stress application shear pin (52), a support ring (53), a cement injection shear pin (54), The hydraulic switch comprises a hydraulic switch central pipe (55), a reversing hole (56), a liquid inlet hole (57), a balance hole (58), a hydraulic switch stressing shear pin (59) and a support ring (60).
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Referring to the attached figures 1 and 2, the invention provides a sidetracking well layering and segmenting cementing device, which adopts the technical scheme that: comprises a blind plug (1), a well cementation ash injection short section (2), an ash injection sealing sliding sleeve (3), a first ash injection port (4), a sealing rubber ring (5), a first circulation hole (6), a first mortar injector (7), a self-sealing (8), water swelling rubber (9), a K344 packer (10), a first well cementation oil pipe (11), a first mechanical switch (12), a program opening sleeve (13), a first hydraulic switch (14), an overcurrent connecting sleeve (15), a seat sealing plug (16), an ash injection core pipe (17), a first signal switch (18), a first layering self-sealing (19), first layering water swelling rubber (20), a first layering K344 packer (21), a layering mortar injector (22), a second ash injection port (23), a second circulation hole (24), a first layering ash injection shear nail (25), a small sealing ball seat (26), a second well cementation oil pipe (27), The self-sealing type cement-injection blind plug is characterized by comprising a self-sealing device (28) for a second layer, water-swelling rubber (29) for the second layer, a K344 packer (30) for the second layer, a second mechanical switch (31), a second hydraulic switch (32), a second signal switch (33), a self-sealing device (34) for the third layer, water-swelling rubber (35) for the third layer, a K344 packer (36) for the third layer, a top-layer cement injection device (37), a large sealing ball seat (38), a top-layer sliding sleeve (39), water-swelling rubber (40) for the top layer, a K344 packer (41), a top-layer self-sealing device (42), a hanger (43), an orientator (44), a releasing circulating pipe column (45), a cement-injection core pipe (46) and an original well casing pipe (47), wherein the left end of the blind plug (1) is connected with a first well cementing oil pipe (11) through a well cementing cement-injection nipple (2), and the self-sealing device (8) is arranged, The cement cementing device comprises water-swelling rubber (9) and a K344 packer (10), wherein a first cement injection port (4) and a first circulation hole (6) are formed in a first well cementation oil pipe (11); the upper end of a first well cementation oil pipe (11) is sequentially connected with a first mechanical switch (12), a first hydraulic switch (14) and a first signal switch (18), the left end of the first signal switch (18) is connected with a second well cementation oil pipe (27), the outer side of the second well cementation oil pipe (27) is sequentially provided with a first layering self-sealing device (19), a first layering water-swelling rubber (20) and a first layering K344 packer (21), the middle of the second well cementation oil pipe (27) is provided with a second ash injection port (23) and a second circulation hole (24), the left end of the second well cementation oil pipe (27) is sequentially connected with a second mechanical switch (31), a second hydraulic switch (32) and a second signal switch (33), the left end of the second signal switch (33) is connected with a top inclined well cementation oil pipe, and the outer wall of the right end of the top inclined well cementation oil pipe is sequentially provided with a third layering self-sealing device (34), The third layering is with water-swellable rubber (35), the third layering is with K344 packer (36), the middle part of top slant cementing oil pipe is equipped with top layer notes ash hole and top layer circulation hole, the left end of top slant cementing oil pipe is connected to original well casing (47), thereby form sidetracking cementing pipe column;
the releasing circulation pipe column (45) is lowered into an inner cavity of a sidetrack well cementation pipe column through a well casing (47), a hanger (43) and a direction finder (44), and the right end part of the releasing circulation pipe column (45) is connected with a plurality of ash injection sealing sliding sleeves to realize the matched closing of a first ash injection port (4) and a first circulation hole (6), a second ash injection port (23), a second circulation hole (24), a top ash injection port and a top circulation hole;
a cement injection core pipe (46) is arranged in the inner cavity of the releasing circulation pipe column (45), a setting sealing plug (16) is arranged at the right end part of the cement injection core pipe (46), and the setting sealing plug can be pushed to the right end part by pressing, so that a first cement injection port (4) and a first circulation hole (6) are opened, and cement injection and well cementation are carried out on a first layer; a first ash injection shear pin (25) for layering and a small sealing ball seat (26) are arranged in the middle of the ash injection core pipe (46), the small sealing ball seat (26) can be seated through throwing small steel balls, the first ash injection shear pin (25) for layering is cut off through pressing, the small sealing ball seat (26) is pushed to a limiting block at the right end, a second ash injection port (23) and a second circulation hole (24) are opened, and ash injection and well cementation are carried out on a second layer; and the position of the ash injection core pipe (46) at the top inclined well cementation oil pipe is provided with a large sealing ball seat (38), the large sealing ball seat (38) is pressed after being thrown in, and the large sealing ball seat (38) is pushed to the right side, so that a top layer ash injection port and a top layer circulation hole are opened, ash injection and well cementation are carried out on the top layer, and then layered ash injection and well cementation are realized.
It should be noted that the length of the horizontal direction of the present invention is long, so that the drawing is disassembled into fig. 1 and fig. 2 when the drawing is submitted, and in normal use, the drawing 1 and fig. 2 need to be combined together, namely, the whole device diagram is obtained.
Referring to the attached figure 3, a limiting groove is formed in the inner wall of the right end of the well cementation ash injection short section (2), an ash injection sealing sliding sleeve (3) is installed in the limiting groove, the ash injection sealing sliding sleeve (3) is connected with a first mortar injector (7) through a stress application shear pin (52), one side of a through hole of the first mortar injector (7) corresponds to the well cementation ash injection short section (2), and the other side of the through hole of the first mortar injector corresponds to an ash injection through hole of an ash injection core pipe (46).
Preferably, the inner wall of the ash injection core pipe (46) is connected with the setting sealing plug (16) through an ash injection shear pin (54), and the ash injection through hole of the ash injection core pipe (46) is shielded by the outer wall of the setting sealing plug (16); the left end part of the seat sealing plug (16) is provided with a ball seat, and the seat sealing plug can be seated on the ball seat by throwing a small steel ball.
Wherein, the inner wall of ash nipple joint (2) is annotated in the well cementation is equipped with reserve groove A, the right side outer wall of annotating ash sealing sliding sleeve (3) is equipped with support ring (53), moves the back left in annotating ash sealing sliding sleeve (3), through support ring (53) and reserve groove cooperation to will annotate ash sealing sliding sleeve (3) and hug closely the inner wall at ash nipple joint (2) is annotated in the well cementation, and will first notes ash mouth (4) and close.
Referring to the attached figure 4, the first hydraulic switch (14) comprises a hydraulic switch central tube (55), a reversing hole (56), a liquid inlet hole (57), a balance hole (58), a hydraulic switch stress application shear pin (59), a support ring (60) and a reserved groove A, wherein the reversing hole (56), the liquid inlet hole (57) and the balance hole (58) are sequentially arranged on the right side of the hydraulic switch central tube (55), the reserved groove A is arranged on the left side of the hydraulic switch central tube (55), the inner sides of the reversing hole (56), the liquid inlet hole (57) and the balance hole (58) are shielded by a program opening sleeve (13), the support ring (60) is arranged at the left end of the program opening sleeve (13), the stress application shear pin (52) is arranged on the right side of the support ring (60), the program opening sleeve (13) is connected with an overcurrent connection sleeve (15) through the stress application shear pin (52), and the overcurrent connection sleeve (15) is fixed on the outer wall of a release circulating tubular column (45, when the releasing circulation pipe column (45) is lifted upwards, the overflowing connecting sleeve (15) is used for driving the program opening sleeve (13) to lift upwards and move, and the reversing hole (56), the liquid inlet hole (57) and the balance hole (58) are opened.
The aperture of the liquid inlet hole (57) is larger than that of the reversing hole (56), and the aperture of the reversing hole (56) is larger than that of the balance hole (58).
In addition, it should be noted that: the second hydraulic switch 32 and the hydraulic switch of the top stage have the same structure as the first hydraulic switch.
Referring to the attached drawing 5, the first mechanical switch (12) comprises a mechanical switch body (48), a sealing sliding sleeve (49), an opening ring (50) and a closing ring (51), wherein two ends of the mechanical switch body (48) are provided with connectors, the mechanical switch body between the two connectors is provided with a large-diameter limiting cavity, the large-diameter limiting cavity is provided with a liquid outlet hole and a reserved groove C, the sealing sliding sleeve (49) is mounted on the inner side of the large-diameter limiting cavity, the outer wall of the sealing sliding sleeve (49) is provided with the opening ring (50) and the closing ring (51), and the opening ring (50) and the closing ring (51) are matched with the reserved groove C to realize the opening and closing of the liquid outlet hole. In addition, the second mechanical switch 31 and the top layer mechanical switch have the same structure as the first mechanical switch, and are not described in detail.
In addition, referring to the attached drawing 1, a small sealing ball seat (26) is arranged in the middle of the ash injection core pipe (46), a large sealing ball seat (38) is arranged at the position, located at the top inclined well cementation oil pipe, of the ash injection core pipe (46), the inner diameter of the large sealing ball seat (38) is larger than the outer diameter of the small steel ball, and the small steel ball can smoothly fall onto the small sealing ball seat (26) through the large sealing ball seat (38).
In addition, the first signal switch (18) and the second signal switch (33) employ check valves for limiting the formation pressure.
The use method of the sidetracking well layering and segmenting cementing device comprises the following steps:
1. firstly, a directional device (44) is put into a raw well casing (47) of an oil well to perform sidetrack drilling according to the requirement of logging information, and an open hole is drilled transversely or obliquely; then, assembling the whole side drilling layered segmented well cementation device on the ground, and directly putting the whole side drilling well cementation pipe column, a cement injection core pipe and a release circulation pipe column into a bare well, wherein the side drilling well cementation pipe column comprises a blind plug (1), a well cementation cement short section (2), a first well cementation oil pipe (11), a first mechanical switch (12), a first hydraulic switch (14), a first signal switch (18), a second well cementation oil pipe (27), a second mechanical switch (31), a second hydraulic switch (32), a second signal switch (33) and a top inclined well cementation oil pipe, all oil layers are separated by self-sealing, water swelling rubber and a K344 packer, and at the moment, the first cement injection port (4) and the first circulation hole (6), and the second cement injection port (23), the second circulation hole (24), the top cement injection port and the top circulation hole are respectively in a closed state;
2. secondly, downwards pressing the ash injection core pipe (46), dropping the setting sealing plug (16) to the bottom of the ash injection device (7), so as to open a first ash injection port (4) blocked by the setting sealing plug (16), then, operating on the ground, slowly injecting the ash into the stratum through the ash injection core pipe (46) and injecting the ash into the stratum through the first ash injection port (4) to form a first ash injection layer, stopping injecting ash when the pressure on the ground surface is increased to a designed pressure value of 15-25 MPa, reversely washing the well through an annular space between the ash injection core pipe (46) and a releasing circulation pipe column (45), and cleaning the ash injection core pipe until a liquid outlet on the ground is clean water, thus finishing the ash injection process of the first ash injection layer;
3. thirdly, after the ash injection procedure of the first ash injection layer is completed, small steel balls are put into the ash injection core pipe from the ground, the small steel balls fall onto a small sealing ball seat (26) along the ash injection core pipe, the small sealing ball seat (26) is set and sealed, then pressing is carried out, at the moment, an ash injection shear pin connected with the small sealing ball seat is cut off, so that the small sealing ball seat (26) falls onto a limiting block on the lower right side, and a second ash injection port (23) which is blocked is opened, at the moment, because a first layering self-sealing (19), a first layering water-swelling rubber (20) and a first layering K344 packer (21) are arranged on the right side of the second ash injection port (23), a second layering self-sealing (28), a second layering water-swelling rubber (29) and a second layering K344 packer (30) are arranged on the left side of the second ash injection port (23); therefore, mortar injected through the ground is injected into a second ash injection layer through the second ash injection port (23) through the ash injection core pipe (46), when the pressure of the ground surface rises to the design pressure value of 15-25 MPa, the ash injection is stopped, the well is back-washed through the annular space between the ash injection core pipe (46) and the releasing circulation pipe column (45), the ash injection core pipe is cleaned until the liquid outlet on the ground is clean water, and the ash injection process of the second ash injection layer is completed;
4. fourthly, after the ash injection procedure of the second ash injection layer is completed, large steel balls are thrown into the ash injection core pipe from the ground, the large steel balls fall onto the large sealing ball seats (38) along the ash injection core pipe, the large sealing ball seats (38) are set and sealed, pressing is carried out, and at the moment, top shear pins connected with the reply sealing ball seats are cut off, so that the large sealing ball seats (38) fall onto a limiting block at the lower right side, and the blocked ash injection port at the top layer is opened; at the moment, a second self-sealing for layering (28), a water-swelling rubber for layering (29) and a K344 packer (30) are arranged on the right side of the top-layer ash injection port, and a third self-sealing for layering (34), a water-swelling rubber for layering (35) and a K344 packer (36) for layering are arranged on the left side of the top-layer ash injection port; therefore, mortar injected through the ground is injected into a third ash injection layer through the ash injection core pipe (46) through the top ash injection port, when the pressure on the ground surface rises to the designed pressure value of 15-25 MPa, the ash injection is stopped, the reverse well washing is carried out through the annular space between the ash injection core pipe (46) and the releasing circulation pipe column (45), the ash injection core pipe is cleaned until the liquid outlet on the ground is clean water, and the ash injection process of the third ash injection layer is completed;
5. fifthly, after the cement injection is finished, releasing operation is carried out, and the cement core pipe (46) and the releasing circulation pipe column (45) are lifted out of the original well casing (47) through lifting the cement core pipe and the releasing circulation pipe column on the ground well head, so that layered segmented well cementation construction is completed.
6. During the operation of lifting the ash injection core pipe (46) and the releasing circulation pipe column (45), as the rightmost end of the releasing circulation pipe column (45) is connected with the ash injection sealing sliding sleeve (3), after lifting, a stress application shear pin (52) is sheared, the ash injection sealing sliding sleeve (3) moves along a limiting groove on the inner wall of the cementing ash inlet short section (2) and is matched with the reserved groove A through a supporting ring (53), so that the ash injection sealing sliding sleeve (3) is locked, and the first ash injection port (4) and the first circulation hole (6) are closed; in the same way, the ash injection shear pin (25) is sheared, and the second ash injection port (23) and the second circulation hole (24) are also closed; in the same way, the top layer ash injection port and the top layer circulation hole are closed;
7. in the operation of lifting and injecting the ash core pipe (46) and releasing and circulating the tubular column (45), the releasing and circulating tubular column (45) drives the overflowing connecting sleeve (15) to move, the overflowing connecting sleeve (15) drives the program opening sleeve (13) to move through a hydraulic switch stress application shear pin (59), so that a reversing hole (56), a liquid inlet hole (57) and a balance hole (58) of the first hydraulic switch (14) are opened, and the program opening sleeve (13) fixes the program opening sleeve (13) on the left side of a hydraulic switch central pipe (55) through a support ring (60), so that the first hydraulic switch (14) is opened, and in the same way, the second hydraulic switch and the top layer hydraulic switch are opened, and the subsequent layered oil extraction operation is facilitated;
8. in the operation of the upper lifting ash injection core pipe (46) and the releasing circulation pipe column (45), the releasing circulation pipe column (45) drives the sealing sliding sleeve (49) to move, so that the opening ring (50) of the first mechanical switch (12) is opened, and similarly, the second mechanical switch is opened.
The above description is only a few of the preferred embodiments of the present invention, and any person skilled in the art may modify the above-described embodiments or modify them into equivalent ones. Therefore, any simple modifications or equivalent substitutions made in accordance with the technical solution of the present invention are within the scope of the claims of the present invention.
Claims (6)
1. A use method of a sidetracking well layering and segmenting cementing device is characterized by comprising the following steps: the method comprises the following steps:
firstly, a directional device (44) is put into a raw well casing (47) of an oil well to perform sidetrack drilling according to the requirement of logging information, and an open hole is drilled transversely or obliquely; then, the whole sidetracking well-drilling layered segmented well cementation device is assembled on the ground, the whole sidetracking well cementation pipe column, the ash injection core pipe and the releasing circulation pipe column are directly put into the naked well, wherein, the sidetracking cementing pipe column comprises a blind plug (1), a cementing ash-injection short section (2), a first cementing oil pipe (11), a first mechanical switch (12), a first hydraulic switch (14), a first signal switch (18), a second cementing oil pipe (27), a second mechanical switch (31), a second hydraulic switch (32), a second signal switch (33) and a top inclined cementing oil pipe, two adjacent oil layers realize the separation of the oil layers by arranging a self-sealing, water-swelling rubber and K344 packer, the first ash injection port (4) and the first circulating hole (6), the second ash injection port (23), the second circulating hole (24), the top ash injection port and the top circulating hole are respectively in a closed state;
secondly, downwards pressing the ash injection core pipe (46), dropping the setting sealing plug (16) to the bottom of the ash injection device (7), so as to open a first ash injection port (4) blocked by the setting sealing plug (16), then, operating on the ground, slowly injecting the ash into the stratum through the ash injection core pipe (46) and injecting the ash into the stratum through the first ash injection port (4) to form a first ash injection layer, stopping injecting ash when the pressure on the ground surface is increased to a designed pressure value of 15-25 MPa, reversely washing the well through an annular space between the ash injection core pipe (46) and a releasing circulation pipe column (45), and cleaning the ash injection core pipe until a liquid outlet on the ground is clean water, thus finishing the ash injection process of the first ash injection layer;
thirdly, after the ash injection procedure of the first ash injection layer is completed, small steel balls are put into the ash injection core pipe from the ground, the small steel balls fall onto a small sealing ball seat (26) along the ash injection core pipe, the small sealing ball seat (26) is set and sealed, then pressing is carried out, at the moment, an ash injection shear pin connected with the small sealing ball seat is cut off, so that the small sealing ball seat (26) falls onto a limiting block on the lower right side, and a second ash injection port (23) which is blocked is opened, at the moment, because a first layering self-sealing (19), a first layering water-swelling rubber (20) and a first layering K344 packer (21) are arranged on the right side of the second ash injection port (23), a second layering self-sealing (28), a second layering water-swelling rubber (29) and a second layering K344 packer (30) are arranged on the left side of the second ash injection port (23); therefore, mortar injected through the ground is injected into a second ash injection layer through the second ash injection port (23) through the ash injection core pipe (46), when the pressure of the ground surface rises to the design pressure value of 15-25 MPa, the ash injection is stopped, the well is back-washed through the annular space between the ash injection core pipe (46) and the releasing circulation pipe column (45), the ash injection core pipe is cleaned until the liquid outlet on the ground is clean water, and the ash injection process of the second ash injection layer is completed;
fourthly, after the ash injection procedure of the second ash injection layer is completed, large steel balls are thrown into the ash injection core pipe from the ground, the large steel balls fall onto the large sealing ball seats (38) along the ash injection core pipe, the large sealing ball seats (38) are set and sealed, pressing is carried out, at the moment, top shear pins connected with the large sealing ball seats are cut off, the large sealing ball seats (38) fall onto a limiting block on the lower right side, and the blocked ash injection port on the top layer is opened; at the moment, a second self-sealing for layering (28), a water-swelling rubber for layering (29) and a K344 packer (30) are arranged on the right side of the top-layer ash injection port, and a third self-sealing for layering (34), a water-swelling rubber for layering (35) and a K344 packer (36) for layering are arranged on the left side of the top-layer ash injection port; therefore, mortar injected through the ground is injected into a third ash injection layer through the ash injection core pipe (46) through the top ash injection port, when the pressure on the ground surface rises to the designed pressure value of 15-25 MPa, the ash injection is stopped, the reverse well washing is carried out through the annular space between the ash injection core pipe (46) and the releasing circulation pipe column (45), the ash injection core pipe is cleaned until the liquid outlet on the ground is clean water, and the ash injection process of the third ash injection layer is completed;
fifthly, after the cement injection is finished, releasing operation is carried out, and the cement core pipe (46) and the releasing circulation pipe column (45) are lifted out of the original well casing (47) through lifting the cement core pipe and the releasing circulation pipe column on the ground well head, so that layered segmented well cementation construction is completed.
2. The method of using the sidetracking well zonal segmentation cementing device according to claim 1, wherein: in the operation of lifting and injecting the ash core pipe (46) and the releasing circulating pipe column (45), because the rightmost end of the releasing circulating pipe column (45) is connected with the ash injection sealing sliding sleeve (3), after lifting, a stress shear pin (52) is cut off, the ash injection sealing sliding sleeve (3) moves along a limiting groove on the inner wall of the cementing ash inlet short section (2) and is matched with the reserved groove A through a supporting ring (53), so that the ash injection sealing sliding sleeve (3) is locked, and the first ash injection port (4) and the first circulating hole (6) are closed.
3. The method of using the sidetracking well zonal segmentation cementing device according to claim 1, wherein: in the operation of lifting and injecting the ash core pipe (46) and the releasing circulation pipe column (45), the releasing circulation pipe column (45) drives the overflowing connecting sleeve (15) to move, the overflowing connecting sleeve (15) drives the program opening sleeve (13) to move through a hydraulic switch stress application shear pin (59), so that a reversing hole (56), a liquid inlet hole (57) and a balance hole (58) of the first hydraulic switch (14) are opened, and the program opening sleeve (13) is fixed on the left side of a hydraulic switch central pipe (55) through a support ring (60) by the program opening sleeve (13), so that the first hydraulic switch (14) is opened.
4. The method of using the sidetracking well zonal segmentation cementing device according to claim 1, wherein: in the operation of the upper injection ash core pipe (46) and the releasing circulation pipe column (45), the releasing circulation pipe column (45) drives the sealing sliding sleeve (49) to move, and then the opening ring (50) of the first mechanical switch (12) is opened.
5. The method of using the sidetracking well zonal segmentation cementing device according to claim 1, wherein: the left end of a blind plug (1) of a side-drilling well cementation tubular column is connected with a first well cementation oil pipe (11) through a well cementation ash injection nipple (2), a self-sealing (8), water swelling rubber (9) and a K344 packer (10) are sequentially arranged on the outer side of the first well cementation oil pipe (11), and a first ash injection port (4) and a first circulation hole (6) are formed in the first well cementation oil pipe (11); the upper end of a first well cementation oil pipe (11) is sequentially connected with a first mechanical switch (12), a first hydraulic switch (14) and a first signal switch (18), the left end of the first signal switch (18) is connected with a second well cementation oil pipe (27), the outer side of the second well cementation oil pipe (27) is sequentially provided with a first layering self-sealing device (19), a first layering water-swelling rubber (20) and a first layering K344 packer (21), the middle of the second well cementation oil pipe (27) is provided with a second ash injection port (23) and a second circulation hole (24), the left end of the second well cementation oil pipe (27) is sequentially connected with a second mechanical switch (31), a second hydraulic switch (32) and a second signal switch (33), the left end of the second signal switch (33) is connected with a top inclined well cementation oil pipe, and the outer wall of the right end of the top inclined well cementation oil pipe is sequentially provided with a third layering self-sealing device (34), The third layering is with meeting water swelling rubber (35), the third layering is with K344 packer (36), and the middle part of top slant well cementation oil pipe is equipped with top layer notes ash hole and top layer circulation hole, and the left end of top slant well cementation oil pipe is connected to former well casing (47) to form sidetracking well cementation tubular column.
6. The method of using the sidetracking well zonal segmentation cementing device according to claim 1, wherein: the releasing circulation pipe column (45) is arranged in an inner cavity of a sidetrack well cementation pipe column through a well casing (47), a hanger (43) and a direction finder (44), the right end part of the releasing circulation pipe column (45) is connected with a plurality of ash injection sealing sliding sleeves, and a first ash injection port (4) and a first circulation hole (6) are closed in a matched mode, and a second ash injection port (23), a second circulation hole (24), a top ash injection port and a top circulation hole are closed in a matched mode.
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| CN109723411B (en) * | 2019-01-07 | 2021-09-24 | 盐城旭东机械有限公司 | Layered oil production device for side drilling |
| CN109458162B (en) * | 2019-01-07 | 2021-03-26 | 王皓 | Hydraulic switch device for stratified oil production for side drilling |
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