CN113338830B - Releasing tool and separate production well completion method for horizontal well multi-branch well bore - Google Patents
Releasing tool and separate production well completion method for horizontal well multi-branch well bore Download PDFInfo
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- CN113338830B CN113338830B CN202110648753.3A CN202110648753A CN113338830B CN 113338830 B CN113338830 B CN 113338830B CN 202110648753 A CN202110648753 A CN 202110648753A CN 113338830 B CN113338830 B CN 113338830B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000010008 shearing Methods 0.000 claims abstract description 15
- 230000002093 peripheral effect Effects 0.000 claims description 41
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 12
- 238000005553 drilling Methods 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 4
- 239000003129 oil well Substances 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000005452 bending Methods 0.000 description 7
- 239000013043 chemical agent Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011084 recovery Methods 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
A releasing tool and a separate production well completion method of a horizontal well multi-branch well bore are disclosed, wherein the releasing tool comprises a first pipe body; a second tube body; a third tube; the ball seat comprises a sliding sleeve and is connected with the second pipe section in a sliding manner; the first limiting bulge extends outwards in the radial direction from one end of the sliding sleeve extending into the third pipe section; the connecting piece is arranged in the through hole; and one end of the shearing pin is connected with the sliding sleeve, and the other end of the shearing pin is connected with the second pipe section. The releasing tool is easy to realize well re-entry of a horizontal well branch well. The method for separate production and well completion can enable the branch well flexible sieve tube to be placed into the branch well of the horizontal well with the ultra-short radius by matching the releasing tool with the branch well flexible sieve tube, meanwhile, the main well sieve tube and the separator are placed into the main well, and the switchable separate production can be achieved through the production pipe column with the switch sliding sleeve, so that the production life of an oil well can be prolonged, and the application range of the ultra-short radius horizontal well technology is expanded.
Description
Technical Field
The present invention relates to oil and gas exploitation technology, and is especially one kind of releasing tool and well completing method for horizontal well multilateral well.
Background
With the increasing exploitation of oil fields, most of the oil fields enter the middle and later stages of oil field development, high water cut and high exploitation degree are main problems in the oil field development, and the conventional measures for increasing production and increasing recovery efficiency are limited in further effectively releasing the potential of oil reservoirs. The ultra-short radius drilling technology is suitable for economically and effectively excavating the residual oil in the oil field by virtue of the characteristics of low cost, short operation period and simple equipment requirement. However, the conventional well completion tool cannot realize well re-entry, independent production cannot be realized among branch well bores, and the production effect of the well can be directly influenced after water content of one branch rises or sand is produced.
Therefore, there is a need to develop a release tool that facilitates wellbore reentry.
Disclosure of Invention
The application provides a releasing tool, it includes:
a first pipe body comprising
The first barrel comprises a first pipe section, a second pipe section and a third pipe section which are sequentially connected, and a through hole is formed in the third pipe section;
the second cylinder comprises a first connecting cylinder sleeved on the first pipe section and a ball cylinder with one end connected with the first connecting cylinder;
a second pipe body comprising
A third barrel comprising a first end inserted into the first tube segment and the bulb and forming a rotational connection with the first tube segment;
the third pipe body is sleeved on the third pipe section, and a groove aligned with the through hole is formed in the inner peripheral wall of the third pipe body;
a tee comprising
The sliding sleeve is connected with the second pipe section in a sliding mode, and one end of the sliding sleeve extends into the third pipe section;
the first limiting bulge extends out radially from one end, extending into the third pipe section, of the sliding sleeve;
the connecting piece is arranged in the through hole, and two opposite sides of the connecting piece are respectively abutted against the outer peripheral surface of the first limiting bulge and the groove; and
and one end of the shearing pin is connected with the sliding sleeve, and the other end of the shearing pin is connected with the second pipe section.
In the process of completing the ultra-short radius horizontal well, the flexible screen pipe of the lateral well can be lowered into the lateral well of the horizontal well through the releasing tool, the first pipe body and the second pipe body form universal rotating connection, the first pipe body and the second pipe body can be bent, and the releasing tool can be bent along with the bending of the lateral well of the horizontal well when entering the lateral well of the horizontal well, so that the releasing tool can easily realize well reentry of the lateral well of the horizontal well.
After the releasing tool and the branch well flexible sieve tube are put in place, a steel ball is put in, and the diameter of the steel ball is larger than the minimum inner diameter of the ball seat. The steel ball enters the ball seat along with the drilling fluid and blocks an inner hole of the ball seat, the drilling fluid pushes the ball seat under the pressure applied by the drilling fluid on the steel ball and the ball seat, a shearing force is generated between the ball seat and the first pipe body to shear the shearing pin, and the ball seat moves for a certain distance in the direction close to the third pipe body. After the ball seat moves, the first limiting protrusion is moved away from the bottom of the connecting piece, the first limiting protrusion does not abut against the connecting piece any more, the connecting piece can be separated from the groove of the third pipe body, so that the connection between the first pipe body and the third pipe body is eliminated, the first pipe body can be separated from the third pipe body, when the hand tool is lifted and lost, the third pipe body is kept in a branch well bore of the horizontal well, and the first pipe body, the second pipe body, the steel ball and the ball seat are all lifted out of the well bore.
Additional features and advantages of the present application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the present application. Other advantages of the present application can be realized and attained by the instrumentalities and combinations particularly pointed out in the specification and the drawings.
Drawings
The accompanying drawings are included to provide an understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the examples serve to explain the principles of the disclosure and not to limit the disclosure.
FIG. 1 is a partial cross-sectional view of a releasing tool according to an embodiment of the present application;
FIG. 2 is a schematic diagram of step S2 of a method for performing a separate production completion in an embodiment of the present application;
fig. 3 is a schematic diagram of step S3 of implementing the production completion method in the embodiment of the present application.
Detailed Description
Referring to fig. 1, fig. 1 shows a schematic structural diagram of a releasing tool 10 in the present embodiment. The releasing tool 10 includes a first tubular body 2, a second tubular body 3, a third tubular body 4, a ball seat 5, a shear pin 6, and a plurality of connectors 8. One end of the first pipe body 2 is rotatably connected with one end of the second pipe body 3.
The first tubular body 2 comprises a first cylinder 21 and a second cylinder 22. The first cylinder 21 is configured as a cylinder. The first cylinder 21 includes a first tube section 211, a second tube section 212, and a third tube section 213. The first pipe section 211, the second pipe section 212 and the third pipe section 213 are connected in sequence. The inner peripheral surface of the first pipe section 211 is provided as an inner spherical surface. The center of the inner spherical surface is located on the axis of the first cylinder 21.
The second tube section 212 is provided with a radially inwardly projecting annular mounting seat 214. The annular mounting seat 214 is annular, and a slide way is arranged in the middle of the annular mounting seat 214 and is a circular hole coaxial with the first cylinder 21. A pin hole 216 is also provided in the second tubular section 212. The pin hole 216 extends in the radial direction of the first cylinder 21. The pin hole 216 extends from the outer peripheral wall of the first cylinder 21 to the inner peripheral wall of the chute. The edge of the inner circumferential surface of the first tube section 211 is flush with the slide.
One end of the third tube section 213 is connected to the end of the second tube section 212 facing away from the first tube section 211. The third pipe section 213 is arranged coaxially with the second pipe section 212. The third tube section 213 is provided with a through hole 215 which radially penetrates the third tube section 213. The through hole 215 may be provided in plural, and the plural through holes 215 are uniformly arranged around the circumference of the third pipe section 213.
The second cylinder 22 includes a first connection cylinder 221 and a ball cylinder 222. The first connecting cylinder 221 is a right circular cylinder. The first connecting cylinder 221 is fitted over the first pipe section 211 of the first pipe body 2. The first connecting cylinder 221 is fixedly connected with the first pipe section 211. The ball barrel 222 is of a cylindrical configuration. One end of the ball cylinder 222 is connected to the first connecting cylinder 221. One end surface of the ball sleeve 222 abuts against the end surface of the second pipe section 212 of the first pipe body 2. The inner peripheral surface of the ball cylinder 222 is an inner spherical surface, and the outer peripheral surface of the ball cylinder 222 is an outer spherical surface. The inner peripheral surface of the ball cylinder 222, the outer peripheral surface of the ball cylinder 222, and the spherical center of the inner peripheral surface of the first pipe segment 211 overlap. The spherical diameters of the inner peripheral surface of the ball tube 222 and the inner peripheral surface of the first pipe section 211 are equal, and the inner peripheral surface of the ball tube 222 and the inner peripheral surface of the first pipe section 211 smoothly transition. The inner diameters of the ball barrel 222 and the first pipe section 211 are largest at the intersection of the inner circumferential surface of the ball barrel 222 and the inner circumferential surface of the first pipe section 211. The further the first tube section 211 is from the portion of the barrel 222, the smaller its inner diameter. The inner diameter of the ball barrel 222 decreases the further it is from the first pipe section 211.
The second tubular body 3 comprises a third cylinder 31. The third cylinder 31 is configured as a cylinder. The third cylinder 31 has flexibility or elasticity. The third cylinder 31 includes a first end 310 and a second end opposite to the first end 310. The end surface of the first end 310 is provided as an outer spherical surface. The spherical center of the end surface of the first end 310 coincides with the spherical center of the inner circumferential surface of the first pipe section 211. The first end 310 is inserted into the ball barrel 222, and an end surface of the first end 310 can abut against the inner circumferential surface of the first pipe segment 211 and the inner circumferential surface of the ball barrel 222. The end surface of the first end 310, the inner circumferential surface of the ball barrel 222 and the inner circumferential surface of the first pipe section 211 have the same spherical diameter. The end surface of the first end 310 can slide along the inner circumferential surface of the first pipe section 211 and the inner circumferential surface of the ball barrel 222, so that the second pipe body 3 and the first pipe body 2 form a rotational connection.
The first pipe body 2 and the second pipe body 3 form universal rotation connection, and the first pipe body 2 can swing relative to the second pipe body 3.
The ball seat 5 includes a sliding bush 51 and a first stopper protrusion 52. The sliding sleeve 51 is tubular. The inner diameter of the middle portion of the sliding sleeve 51 is smaller than the inner diameters of both ends thereof. The outer peripheral wall of the sliding sleeve 51 is provided with a blind hole. The sliding sleeve 51 is inserted into the slide of the annular mounting block 214. One end of the sliding sleeve 51 protrudes away from the first pipe section 211. The first limiting protrusion 52 protrudes radially outward from an end of the sliding sleeve 51 facing away from the first pipe section 211. The first stopper protrusion 52 may have a ring shape. The top end of the first stopper protrusion 52 is close to the through hole 215 of the third cylinder 31.
The blind hole 54 of the sliding sleeve 51 is aligned with the pin hole 216, one end of the shear pin 6 is inserted into the pin hole 216, and the other end of the shear pin 6 is inserted into the blind hole 54 of the sliding sleeve 51. Shear pin 6 fixedly connects ball seat 5 with first body 2. After the cutting pin 6 is cut, the ball seat 5 can slide along the slideway.
The blind holes 54, the pin holes 216 and the shear pins 6 can be arranged in plurality and equal in number. A plurality of pin holes 216 are evenly distributed around the circumference of the second tube section 212. The plurality of blind holes 54 are evenly distributed around the circumference of the sliding sleeve 51. The plurality of blind holes 54 are aligned with the plurality of pin holes 216, respectively, one ends of the plurality of shear pins 6 are inserted into the plurality of pin holes 216, respectively, and the other ends of the plurality of shear pins 6 are inserted into the plurality of blind holes 54, respectively.
The third tube 4 is cylindrical in shape. The third pipe 4 is fitted over the third pipe section 213. The third tube 4 and the second tube 3 are coaxially arranged. A groove 41 is provided on the inner wall of the third tube 4. The number of the grooves 41 may be provided in plurality, and the number of the grooves 41 is the same as the number of the through holes 215 of the third pipe section 213. The plurality of grooves 41 are respectively aligned with the plurality of through holes 215.
The connector 8 may be spherical or ellipsoidal. The number of the connecting members 8 may be plural, and the number of the connecting members 8 may be the same as the number of the through holes 215 of the third pipe body 4. A plurality of connection members 8 may be respectively disposed in the plurality of through holes 215. The connecting member 8 is further interposed between the third tubular body 4 and the first stopper projection 52 of the ball seat 5. Opposite sides of the connecting member 8 abut against the outer peripheral surface of the first stopper protrusion 52 and the groove 41 of the third tube 4, respectively. The connecting piece 8 connects the third tube 4 and the first tube 2 together.
In the process of completing a horizontal well with an ultra-short radius, the flexible screen pipe 12 of the lateral borehole can be lowered into the lateral borehole of the horizontal well through the releasing tool 10, the first pipe body 2 and the second pipe body 3 can be bent due to the fact that the first pipe body 2 and the second pipe body 3 form universal rotating connection, and the releasing tool 10 can be bent along with the bending of the lateral borehole 13 of the horizontal well when entering the lateral borehole 13 of the horizontal well.
After the releasing tool 10 and the branch well flexible sieve tube 12 are put in place, a steel ball is put in, and the diameter of the steel ball is larger than the minimum inner diameter of the ball seat 5. The steel ball enters the ball seat 5 along with the drilling fluid and blocks the inner hole of the sliding sleeve 51, the pressure applied by the drilling fluid to the steel ball and the ball seat 5 pushes the ball seat 5, a shearing force is generated between the ball seat 5 and the first pipe body 2 to shear the shearing pin 6, and the ball seat 5 moves for a certain distance towards the direction close to the third pipe body 4. After the ball seat 5 moves, the first limiting protrusion 52 is moved away from the bottom of the connecting piece 8, the first limiting protrusion 52 does not abut against the connecting piece 8 any more, the connecting piece 8 can be separated from the groove 41 of the third pipe body 4, so that the connection between the first pipe body 2 and the third pipe body 4 is released, the first pipe body 2 and the third pipe body 4 can be separated from each other, when the hand lifting and losing tool 10 is lifted, the third pipe body 4 is left in the horizontal well lateral borehole 13, and the first pipe body 2, the second pipe body 3, the steel ball and the ball seat 5 are lifted out of a borehole.
In an exemplary embodiment, the second tubular body 3 further comprises a fourth cylinder 32. The fourth cylinder 32 is sleeved on the third cylinder 31 and is coaxially arranged with the third cylinder 31. The fourth cylinder 32 includes a second connecting cylinder 321 and a sealing cylinder 322. The second connecting cylinder 321 is configured as a cylinder, and the second connecting cylinder 321 is sleeved on the third cylinder 31 and is located outside the ball cylinder 222. The sealing cylinder 322 is disposed on a side of the second connecting cylinder 321 adjacent to the ball cylinder 222. The inner diameter of the sealing cylinder 322 is larger than the outer diameter of the third cylinder 31. An annular yielding cavity is formed between the sealing cylinder 322 and the third cylinder 31. The ball 222 can enter the avoiding cavity without interfering with the fourth cylinder 32 when the first tube 2 swings relative to the second tube 3. One end of the sealing cylinder 322 is connected to one end of the third cylinder 31. The inner peripheral surface of the seal cylinder 322 facing one end of the ball cylinder 222 is an inner spherical surface. The inner peripheral surface of the seal cylinder 322 overlaps the center of the outer peripheral surface of the ball cylinder 222. The spherical diameter of the inner peripheral surface of the seal cylinder 322 is equal to the spherical diameter of the outer peripheral surface of the ball cylinder 222. The inner peripheral surface of the seal cylinder 322 abuts against the outer peripheral surface of the ball cylinder 222, and the inner peripheral surface of the seal cylinder 322 abuts against the outer peripheral surface of the ball cylinder 222.
Thus, the engagement between the sealing cylinder 322 and the ball cylinder 222 further enhances the seal between the first body 2 and the second body 3 without the sealing structure interfering with the rotational connection between the first body 2 and the second body 3.
In an exemplary embodiment, the ball barrel 222 is provided with a mounting hole 223 radially penetrating the ball barrel 222, and the mounting hole 223 may be arranged in the middle of the ball barrel 222. The mounting hole 223 may be a threaded hole.
The releasing tool 10 further comprises a stop 7. The stop 7 may be a countersunk screw. The limiting member 7 is disposed in the mounting hole 223, and the limiting member 7 and the mounting hole 223 may be screwed together. One end of the limiting member 7 extends into the inner cavity of the ball barrel 222.
The mounting hole 223 may be provided in plural, and the plural mounting holes 223 are uniformly arranged in the circumferential direction of the ball barrel 222. The number of the stoppers 7 is the same as the number of the mounting holes 223, and the plurality of stoppers 7 are respectively provided in the plurality of mounting holes 223.
A second limiting protrusion 331 is further disposed on one end of the third cylinder 31 close to the first cylinder 21. The second restriction protrusion 331 radially outwardly protrudes from the outer circumferential surface of the third cylinder 31. The second stopper protrusion 331 may be an annular protrusion. The second limiting protrusion 331 is located on one side of the limiting member 7 close to the first cylinder 21. The width of the gap between the limiting member 7 and the third cylinder 31 is always smaller than the height of the second limiting protrusion 331.
When the first pipe body 2 and the second pipe body 3 move a certain distance in the direction deviating from each other, the limiting member 7 interferes with the second limiting protrusion 331, and the limiting member 7 and the second limiting protrusion 331 abut against each other to prevent the first pipe body 2 and the second pipe body 3 from being separated from each other.
In an exemplary embodiment, a sand control screen 9 is also disposed within the third tubular body 4. The sand control screen 9 prevents the passage of packing into the production fluid passageway of the lateral bore flexible sand control string during gravel packing of the main bore 16.
In an exemplary embodiment, as shown in fig. 2 and 3, the present embodiment further provides a method for performing a separate production completion of a multilateral wellbore of a horizontal well. The zonal production completion method is implemented based on the above-described release tool 10. The separate production well completion comprises the following steps:
s1: drilling a vertical main borehole 16 and a plurality of horizontal well lateral boreholes 13 extending from the main borehole 16, wherein the plurality of horizontal well lateral boreholes 13 are distributed in a plurality of oil zones;
each horizontal well lateral bore 13 extends horizontally from the sidewall of the main bore 16. One horizontal well lateral 13 may be placed in each reservoir.
S2: connecting a first pipe body 2 of a releasing tool 10 with a pipe column, connecting a third pipe body 4 of the releasing tool 10 with a branch well flexible sieve pipe 12, and running the releasing tool 10 and the branch well flexible sieve pipe 12 into a horizontal well branch well 13 through the pipe column;
throwing a steel ball into the pipe column from the wellhead, injecting drilling fluid into the pipe column, and pressing to separate the second pipe body 3 and the third pipe body 4 of the releasing tool 10 from each other;
this procedure is repeated until all horizontal well lateral boreholes 13 have branch borehole flexible screens 12 placed therein.
The branch well flexible screen 12 is in a circular tube shape, and the branch well flexible screen 12 is provided with a plurality of meshes which penetrate through the wall of the branch well flexible screen 12. A plurality of mesh openings are evenly distributed in the lateral bore flexible screen 12. The lateral bore flexible screen 12 has flexibility to flex. One end of the branch wellbore flexible screen 12 is connected to the releasing tool 10, and the branch wellbore flexible screen 12 can be connected to the guide shoe 11. When the releasing tool 10, the branch well flexible screen 12 and the guide shoe 11 are put into the horizontal well branch well 13, the guide shoe 11 is positioned at the lowest part, and the guide shoe 11 is guided in the bent horizontal well branch well 13. After the guide shoe 11 enters the horizontal well lateral borehole 13, the lateral borehole flexible screen 12 starts to slide along the horizontal well lateral borehole 13, and the part of the lateral borehole flexible screen 12 in the bending section of the horizontal well lateral borehole 13 can be bent to adapt to the bending of the horizontal well lateral borehole 13, so that the lateral borehole flexible screen 12 can smoothly slide into the horizontal well lateral borehole 13. After the branch well flexible screen 12 completely enters the horizontal well branch well 13, the releasing tool 10 enters the bending section of the horizontal well branch well 13, and the releasing tool 10 can be bent along with the bending of the horizontal well branch well 13 when entering the horizontal well branch well. After the releasing tool 10 is put in place, the steel ball is thrown into the releasing tool 10 to suppress pressure, so that the second pipe body 3 and the third pipe body 4 of the releasing tool 10 are separated from each other, the part of the releasing tool 10 left in the horizontal well lateral borehole 13 can be hung on the bending section of the horizontal well lateral borehole 13, and the lateral borehole flexible sieve tube 12 traverses in the horizontal well lateral borehole 13, so that sand prevention can be effectively realized. Repeating this step allows a lateral flexible screen 12 to be run into each horizontal well lateral 13.
S3: as shown in fig. 3, a primary wellbore sand control string 150 is run into the primary wellbore 16; wherein the main wellbore sand control string 150 comprises a main wellbore screen 15 extending along the main wellbore 16 and a plurality of dividers 14 arranged in series along the main wellbore screen 15, the dividers 14 separating two adjacent horizontal well lateral wellbores 13.
In this way, the separator 14 can isolate each horizontal well lateral 13.
S4: and (2) running a production string 17, wherein a plurality of switch sliding sleeves 18 are sequentially arranged on the production string 17, and the switch sliding sleeves 18 can be respectively communicated with the horizontal well branch boreholes 13.
When one of the horizontal well lateral boreholes 13 needs to be closed, only the corresponding switch sliding sleeve 18 needs to be closed, so that the horizontal well lateral borehole 13 with high water content and serious sand production can be closed during oil extraction. When only one horizontal well lateral borehole 13 needs to be injected with chemical agents, the other switch sliding sleeves 18 are closed by opening the switch sliding sleeve 18 corresponding to the horizontal well lateral borehole 13, and then the chemical agents are injected into the production string 17, so that the chemical agents can be injected into one horizontal well lateral borehole 13 independently.
Therefore, the separate production completion method can be used for running the branch well flexible screen 12 into the horizontal well branch well 13 with an ultra-short radius by using the releasing tool 10 and the branch well flexible screen 12 to cooperate, simultaneously running the main well screen 15 and the separator 14 into the main well 16, and separating two adjacent horizontal well branch wells 13 by the separator 14, so that the specified horizontal well branch well 13 can be produced by the production string 17 with the switch sliding sleeve 18, and therefore, switchable separate production can be realized. The separate production well completion method can prolong the production life of an oil well and expand the application range of the ultra-short radius horizontal well technology.
The present application describes embodiments, but the description is illustrative rather than limiting and it will be apparent to those of ordinary skill in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are possible. Any feature or element of any embodiment may be used in combination with, or instead of, any other feature or element in any other embodiment, unless expressly limited otherwise.
The present application includes and contemplates combinations of features and elements known to those of ordinary skill in the art. The embodiments, features and elements disclosed in this application may also be combined with any conventional features or elements to form a unique inventive concept as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive aspects to form yet another unique inventive aspect, as defined by the claims. Thus, it should be understood that any of the features shown and/or discussed in this application may be implemented alone or in any suitable combination. Accordingly, the embodiments are not to be restricted except in light of the attached claims and their equivalents. Furthermore, various modifications and changes may be made within the scope of the appended claims.
Further, in describing representative embodiments, the specification may have presented the method and/or process as a particular sequence of steps. However, to the extent that the method or process does not rely on the particular order of steps set forth herein, the method or process should not be limited to the particular sequence of steps described. Other orders of steps are possible as will be understood by those of ordinary skill in the art. Therefore, the particular order of the steps set forth in the specification should not be construed as limitations on the claims. Further, the claims directed to the method and/or process should not be limited to the performance of their steps in the order written, and one skilled in the art can readily appreciate that the sequences may be varied and still remain within the spirit and scope of the embodiments of the present application.
Claims (9)
1. A releasing tool, comprising:
a first pipe body including
The first barrel comprises a first pipe section, a second pipe section and a third pipe section which are sequentially connected, and a through hole is formed in the third pipe section;
the second cylinder comprises a first connecting cylinder sleeved on the first pipe section and a ball cylinder of which one end is connected to the first connecting cylinder;
a second tubular body including
A third barrel comprising a first end inserted into the first tube section and the ball barrel and forming a rotational connection with the first tube section;
the third pipe body is sleeved on the third pipe section, and a groove aligned with the through hole is formed in the inner peripheral wall of the third pipe body;
a tee comprising
The sliding sleeve is connected with the second pipe section in a sliding mode, and one end of the sliding sleeve extends into the third pipe section;
the first limiting bulge extends out radially from one end, extending into the third pipe section, of the sliding sleeve;
the connecting piece is arranged in the through hole, and two opposite sides of the connecting piece are respectively abutted against the outer peripheral surface of the first limiting bulge and the groove; and
one end of the shearing pin is connected to the sliding sleeve, and the other end of the shearing pin is connected to the second pipe section;
the inner peripheral surface of the ball cylinder is an inner spherical surface, the inner peripheral surface of the first pipe section is an inner spherical surface, and the inner peripheral surface of the ball cylinder and the inner peripheral surface of the first pipe section are in smooth transition;
the end surface of the first end is an outer spherical surface and abuts against the inner circumferential surface of the first pipe section;
the inner peripheral surface of the ball tube, the inner peripheral surface of the first pipe section and the spherical center of the end surface of the first end are overlapped, and the spherical radii of the inner peripheral surface of the ball tube, the inner peripheral surface of the first pipe section and the spherical radius of the end surface of the first end are equal.
2. The releasing tool of claim 1, wherein the connecting member, the through hole and the groove are all provided in plurality and in the same number;
the plurality of grooves are distributed to be aligned with the plurality of through holes, and the plurality of connecting pieces are respectively arranged in the plurality of through holes and respectively abut against the plurality of grooves.
3. The releasing tool of claim 1, wherein the second tubular segment is provided with an annular mounting seat projecting radially inward, the middle of the annular mounting seat being provided with a slideway;
the second pipe section is also provided with a pin hole, and the pin hole extends from the outer peripheral wall of the first cylinder to the inner peripheral wall of the slideway;
the sliding sleeve is arranged in the sliding way, and the outer peripheral wall of the sliding sleeve is provided with a blind hole aligned with the pin hole;
one end of the shearing pin is positioned in the pin hole, and the other end of the shearing pin is positioned in the blind hole.
4. The releasing tool of claim 3, wherein the pin holes are provided in a plurality, the plurality of pin holes being evenly distributed about the second tubular segment;
the number of the blind holes is the same as that of the pin holes, and the blind holes are respectively aligned with the pin holes;
the number of the shearing pins is the same as that of the pin holes, one ends of the shearing pins are respectively inserted into the pin holes, and the other ends of the shearing pins are respectively inserted into the blind holes.
5. The releasing tool of claim 1, wherein the outer peripheral surface of the ball barrel is an outer spherical surface;
the second pipe body further comprises a fourth cylinder body, and the fourth cylinder body comprises
The second connecting cylinder is sleeved on the third cylinder body;
one end of the sealing cylinder is connected to the second connecting cylinder, and the other end of the sealing cylinder is abutted against the outer peripheral surface of the ball cylinder;
the inner circumferential surface of one end of the sealing cylinder facing the ball cylinder is an inner spherical surface, and the inner circumferential surface is overlapped with the spherical center of the outer circumferential surface of the ball cylinder.
6. The releasing tool of claim 5, wherein the inner diameter of the sealing barrel is larger than the outer diameter of the third barrel, and an annular abdicating cavity is formed between the sealing barrel and the third barrel.
7. The releasing tool of claim 5, wherein the ball barrel is further provided with a mounting hole radially penetrating the ball barrel;
the releasing tool further comprises a limiting piece, and the limiting piece extends into the ball barrel from the mounting hole;
a second limiting bulge is further arranged at one end, close to the first cylinder, of the third cylinder and extends out of the outer peripheral surface of the third cylinder in the radial direction;
the width of a gap between the limiting part and the third cylinder is smaller than the height of the second limiting protrusion.
8. The releasing tool according to claim 7, wherein the mounting holes are provided in plural numbers, and the plural mounting holes are uniformly arranged in the circumferential direction of the ball barrel;
the number of the limiting parts is the same as that of the mounting holes, and the limiting parts are arranged in the mounting holes respectively.
9. A method for separate production and completion of a multilateral wellbore of a horizontal well, based on the releasing tool according to any of claims 1 to 8, comprising the following steps:
s1: drilling a vertical main borehole and a plurality of horizontal well branch boreholes extending from the main borehole, wherein the plurality of horizontal well branch boreholes are distributed in a plurality of oil layers;
s2: connecting a first pipe body of a releasing tool with a pipe column, connecting a third pipe body of the releasing tool with the branch well flexible sieve pipe, and putting the releasing tool and the branch well flexible sieve pipe into a horizontal well branch well through the pipe column;
throwing a steel ball into the pipe column from the wellhead, injecting drilling fluid into the pipe column, and pressurizing to separate a second pipe body and a third pipe body of the releasing tool from each other;
repeating the steps until all the horizontal well branch boreholes are provided with the branch borehole flexible sieve tubes;
s3: running a main well sand control pipe column into the main well, wherein the main well sand control pipe column comprises a main well screen pipe extending along the main well and a plurality of separators which are sequentially arranged along the main well screen pipe and separate two adjacent horizontal well branch well bores;
s4: and (2) running a production string, wherein a plurality of switch sliding sleeves are sequentially arranged on the production string, and the switch sliding sleeves can be respectively communicated with a plurality of horizontal well branch boreholes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110648753.3A CN113338830B (en) | 2021-06-10 | 2021-06-10 | Releasing tool and separate production well completion method for horizontal well multi-branch well bore |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110648753.3A CN113338830B (en) | 2021-06-10 | 2021-06-10 | Releasing tool and separate production well completion method for horizontal well multi-branch well bore |
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| CN113338830A CN113338830A (en) | 2021-09-03 |
| CN113338830B true CN113338830B (en) | 2023-02-24 |
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| CN103603615A (en) * | 2013-11-07 | 2014-02-26 | 安东石油技术（集团）有限公司 | Releasing tool |
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| CN110566165A (en) * | 2019-10-30 | 2019-12-13 | 河南理工大学 | Large-curvature horizontal open hole shaft flexible sieve tube running device and running method |
| CN111894474A (en) * | 2020-06-29 | 2020-11-06 | 中国石油天然气股份有限公司西南油气田分公司工程技术研究院 | Operation tool string containing snakelike weight bar |
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| CN1932230A (en) * | 2006-09-13 | 2007-03-21 | 辽河石油勘探局 | Branched well selective guiding in tool |
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| CN103603615A (en) * | 2013-11-07 | 2014-02-26 | 安东石油技术（集团）有限公司 | Releasing tool |
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| CN113338830A (en) | 2021-09-03 |
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