CN118257522A - Continuous tube windowing method - Google Patents
Continuous tube windowing method Download PDFInfo
- Publication number
- CN118257522A CN118257522A CN202211683191.7A CN202211683191A CN118257522A CN 118257522 A CN118257522 A CN 118257522A CN 202211683191 A CN202211683191 A CN 202211683191A CN 118257522 A CN118257522 A CN 118257522A
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- CN
- China
- Prior art keywords
- windowing
- sleeve
- whipstock
- setting
- tool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000007246 mechanism Effects 0.000 claims abstract description 40
- 238000003801 milling Methods 0.000 claims abstract description 39
- 238000007790 scraping Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 210000002445 nipple Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910001339 C alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
Classifications
-
- 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
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/06—Cutting windows, e.g. directional window cutters for whipstock operations
Landscapes
- Life Sciences & Earth Sciences (AREA)
- 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
The invention provides a continuous pipe windowing method, which comprises the following steps: step S20: performing sleeve diameter; step S30: after the wellhead setting positioning mechanism is lowered to a preset position in the sleeve, a setting hanger of the positioning mechanism is set and hung on the inner wall of the sleeve; step S50: setting the whipstock at the wellhead, loosening the bayonet lock, and inserting a whipstock guide mechanism of the whipstock into the hanger; step S70: setting and releasing a windowing milling cone at a wellhead, and lowering the windowing milling cone to an inclined guide mechanism; step S80: and the windowing milling cone is started to drill the inner wall of the sleeve laterally, breaks through the sleeve, and protrudes out and projects into the sleeve, so that the complex operation of lowering a conventional logging instrument into a coiled tubing and then adjusting the windowing azimuth underground is avoided.
Description
Technical Field
The invention relates to the technical field of oil and gas exploitation devices, in particular to a continuous tube windowing method.
Background
The coiled tubing is a tubing made of low-carbon alloy steel, has good flexibility, is also called a coiled tubing, has a length of thousands of meters, can replace a conventional tubing to carry out a plurality of operations, has the characteristics of pressurized operation and continuous lifting, has small equipment volume, quick operation period and low cost, has a plurality of advantages compared with the conventional technology when using the coiled tubing, particularly in sidetrack operation, the continuous circulation of slurry can be realized because the coiled tubing does not need to be connected with a single joint, the lifting and lifting time and the operation period are reduced, well blowout and drilling clamping accidents possibly caused by the single joint are avoided, thereby improving the operation efficiency and the safety,
With the pressure decay of some old oil fields and the discovery of special oil and gas reservoirs, the advantages of continuous pipe sidetracking operation are more and more obvious, for old wells, sidetracking through a continuous pipe is an effective method for exploiting residual reserves and reducing cost, and casing windowing is an essential key link of sidetracking. The current casing windowing mode is complex in operation, for example, repeated downward detection of a conventional logging instrument is needed, the operation efficiency is affected, meanwhile, the well mouth cannot rotate a continuous pipe through a turntable or a top driving device to finish positioning and orientation of a downhole tool, in addition, links are relatively complicated, and the operation safety is affected.
Disclosure of Invention
The invention aims to provide a continuous pipe windowing method, which avoids the complex operation of lowering a conventional logging instrument into a continuous pipe and then adjusting the windowing azimuth underground.
The above object of the present invention can be achieved by the following technical solutions:
the invention provides a continuous tube windowing method, which comprises the following steps:
Step S20: performing sleeve diameter;
Step S30: after the wellhead setting positioning mechanism is lowered to a preset position in the sleeve, a setting hanger of the positioning mechanism is set and hung on the inner wall of the sleeve;
step S50: setting the whipstock at the wellhead, and inserting a whipstock guide mechanism of the whipstock into the setting and hanging device;
step S70: setting and releasing a windowing milling cone at a wellhead, and lowering the windowing milling cone to an inclined guide mechanism;
step S80: and starting the windowing milling cone to drill the windowing side of the inner wall of the sleeve, and enabling the windowing milling cone to break through the sleeve and protrude.
The invention has the characteristics and advantages that:
By the continuous pipe windowing method, the complex operation of lowering a conventional logging instrument into a continuous pipe and then adjusting the windowing azimuth underground is avoided, and the continuous pipe windowing method is safe, reliable, high in accuracy, strong in controllability and strong in adaptability. On the other hand, a window milling cone is connected to one end of the whipstock, the whipstock is longitudinally and downwards installed, a scraper is matched for well wall finishing in the downwards process, the rear whipstock is located in a whipstock fixing groove, the whipstock is separated from the window milling cone, the window milling cone continues to conduct sleeve window opening operation, and the milling mechanism does not need to be repeatedly taken out and downwards detected, so that the integrated degree is high, and the safety is high.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a continuous tube windowing method provided by the invention;
FIG. 2 is a schematic diagram of the continuous tube windowing method according to the present invention;
FIG. 3 is a top view of FIG. 2;
FIG. 4 is a schematic view of a positioning mechanism;
FIG. 5 is a schematic view of a windowing operation structure in a continuous tube windowing method according to the present invention;
FIG. 6 is a schematic diagram of a well wall scraping and milling tool;
FIG. 7 is a schematic illustration of a borehole wall scraping and milling operation;
FIG. 8 is a schematic view of the structure of a hanger;
FIG. 9 is a schematic diagram of a combination of a hanger and a tilt mechanism;
FIG. 10 is a schematic view of a run-in whipstock tool string;
FIG. 11 is a schematic view of the structure of the drift diameter tool;
Fig. 12 is a schematic view of the structure of a window milling cone.
Reference numerals illustrate:
1. a sleeve; 16. A window;
2. a positioning mechanism; 19. A whipstock fixing groove; 20. buffer device
3. A whipstock; 18. A scraper;
4. Windowing milling cone;
5. A diameter tool; 6. weighting the drill rod; 7. a motor head; 8. a connector; 9. a continuous tube;
10. A well wall scraping and milling tool; 11. a screw motor; 12. a scraper;
13. A bayonet lock;
14. A clamping groove; 15. a guide wheel;
17. a sitting and hanging device;
21. A bottom plug;
22. A logging tool;
23. a sloped port; 24. a directional groove;
25. A rotary joint; 26. a connecting nipple; 27. a middle pipe column; 28. an upper joint; 29. a ball bearing;
30. a tilt guiding mechanism; 31. positioning columns; 32. a position sensor.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 to 12, the present invention provides a continuous tube windowing method, comprising: step S20: performing sleeve diameter; step S30: after the wellhead setting positioning mechanism is lowered to a preset position in the sleeve, a setting hanger of the positioning mechanism is set and hung on the inner wall of the sleeve; step S50: setting the whipstock at the wellhead, loosening the bayonet lock, and inserting a whipstock guide mechanism of the whipstock into the hanger; step S70: setting and releasing a windowing milling cone at a wellhead, and lowering the windowing milling cone to an inclined guide mechanism; step S80: and starting the windowing milling cone to drill the windowing side of the inner wall of the sleeve, and enabling the windowing milling cone to break through the sleeve and protrude. By the continuous pipe windowing method, the complex operation of lowering a conventional logging instrument into a continuous pipe and then adjusting the windowing azimuth underground is avoided, and the continuous pipe windowing method is safe, reliable, high in accuracy, strong in controllability and strong in adaptability.
In an embodiment, further comprising: step S10: well head preparation operations including well flushing, blowout preventer replacement, cementing plug, sweeping plug and pressure test are performed.
Step S20: the diameter of the casing 1 is increased by using a diameter tool matched and adapted, the upper end of the diameter tool 5 is connected with a weight drill rod 6, one end of the weight drill rod 6 is connected with a motor head 7, one end of the motor head 7 is connected with a connector 8, a continuous pipe 9 is connected with the connector 8, all the components are connected through a pipe column with fixed diameter,
The diameter tool 5 is used for the diameter of the casing 1, the outer diameter of the diameter tool 5 is not smaller than the maximum outer diameter of a logging tool in the subsequent step, the scraping operation of the inner wall of the casing 1 is carried out by matching with the well wall scraping and milling tool 10, the flatness of the inner wall is maintained, and the preparation of the hole is completed.
As shown in fig. 7, the well wall scraping and milling tool 10 comprises a screw motor 11, a scraper 12, a weighted drill rod 6 and a motor head 7, wherein one end of the screw motor 11 is connected with the scraper 12, one end of the scraper 12 is connected with the weighted drill rod 6, one end of the weighted drill rod 6 is connected with the motor head 7, and one end of the motor head 7 is connected with an oil pipe mechanism. The oil pipe mechanism comprises a connector 8 and a continuous pipe 9, one end of the connector 8 is connected with the continuous pipe 9, and the other end of the connector 8 is connected with the motor head 7. The scraper 12 may be a spring-loaded scraper.
In one embodiment, as shown in fig. 5, a guide wheel 15 is also included.
Step S30: and a positioning mechanism 2 is placed at the wellhead.
As shown in fig. 4, the positioning mechanism 2 comprises a bottom plug 21 and a logging tool 22, the upper end of the bottom plug 21 is connected with a sitting and hanging device 17, the upper end of the sitting and hanging device 17 is connected with the logging tool, one end of the logging tool is connected with a weighting drill rod 6, one end of the weighting drill rod 6 is connected with a motor head 7, one end of the motor head 7 is connected with a continuous pipe, and after the positioning mechanism 2 is lowered to a preset position in the casing 1, the sitting and hanging device 17 of the positioning mechanism 2 is hung on the inner wall of the casing 1.
The clamping groove 14 is formed in the peripheral side surface of the weighting drill rod 6, and is clamped and limited with the clamping pin 13 preset in the inner side of the sleeve 1, so that the position calibration of the deflection guide mechanism 30 is facilitated.
Step S50: the whipstock 3 is placed at the wellhead, the bayonet 13 is loosened, and the whipstock 3 is inserted into the hanger 17 by the whipstock guide mechanism 30.
As shown in fig. 8-10, the tilt guide mechanism 30 includes a positioning column 31, the positioning column 31 is inserted into the hanger 17, one end of the hanger 17 includes an inclined port 23, the upper end of the positioning column 31 is adapted to the position of the inclined port 23, the hanger 17 further includes a directional groove 24, and the directional groove 24 is connected with the inclined port 23
The tilt guide mechanism 30 is internally provided with a position sensor 32, adjusts the position, determines the position of the window opening, and fixes the position. The tilt guide mechanism 30 includes a position sensor 32, which is connected to one end of the positioning post 31, and the position sensor 32 moves longitudinally with the tilt guide mechanism 30.
Step S70: and a window milling cone 4 is set at the wellhead.
As shown in fig. 12, the windowing milling cone 4 comprises a screw motor 11, a weighting drill rod 6, a motor head 7, a connector 8 and a continuous tube 9, wherein one end of the screw motor 11 is connected with the weighting drill rod 6, one end of the weighting drill rod 6 is connected with the motor head 7, the upper end of the motor head 7 is connected with the connector 8, and the continuous tube 9 is connected with the connector 8 to lower the windowing milling cone 4 to the inclined guiding mechanism.
Step S80: and starting the windowing milling cone 4 to drill the inner wall of the sleeve 1 laterally, wherein the windowing milling cone 4 breaks through the sleeve 1 and protrudes out and protrudes into the sleeve to form a window 16.
Further, in step S80, the inner wall of the casing is sidetracked by windowing, and the operating range of the borehole wall milling tool is selected to be more than 10m and less than 10m of the windowing position.
For the fixing of whipstock 3 position, utilize rotary joint 25, rotary joint 25 includes the connection nipple joint 26 of lower extreme, intermediate column and upper joint, connect nipple joint lower extreme and connect whipstock 3, the upper end is connected with intermediate column 27, intermediate column 27 is connected with upper joint 28, install ball bearing 29 between intermediate column 27 and upper joint 28, make upper joint 28 and lower tool string can take place relative rotation, whipstock 3 is gone into the pit through coiled tubing 9 after the good position of ground adjustment, after its lower extreme contacts with positioning mechanism 2 upper end, make downward gravity convert a lateral component under the effect of inclined plane, make the tool string of upper joint lower extreme take place the rotation under the effect of lateral component, make the key on the whipstock 3 slide into the directional groove 24 on the fixed positioning mechanism 2, thereby accomplish the fixing.
By the continuous pipe windowing method, the complex operation of lowering a conventional logging instrument into a continuous pipe and then adjusting the windowing azimuth underground is avoided, and the continuous pipe windowing method is safe, reliable, high in accuracy, strong in controllability and strong in adaptability. On the other hand, a window milling cone is connected to one end of the whipstock, the whipstock is longitudinally and downwards installed, the scraper 18 is matched in the downward process to trim the well wall, the whipstock is located in the whipstock fixing groove 19 after the whipstock is located, the whipstock is separated from the window milling cone, the window milling cone continues the window opening operation of the sleeve, and the milling mechanism does not need to be repeatedly taken out and downwards detected, so that the integration degree is high, and the safety is high.
The foregoing is merely a few embodiments of the present invention and those skilled in the art may make various modifications or alterations to the embodiments of the present invention in light of the disclosure herein without departing from the spirit and scope of the invention.
Claims (10)
1. A method of continuous tube windowing comprising:
Step S20: performing sleeve diameter;
Step S30: after the wellhead setting positioning mechanism is lowered to a preset position in the sleeve, a setting hanger of the positioning mechanism is set and hung on the inner wall of the sleeve;
step S50: setting the whipstock at the wellhead, and inserting a whipstock guide mechanism of the whipstock into the setting and hanging device;
step S70: setting and releasing a windowing milling cone at a wellhead, and lowering the windowing milling cone to an inclined guide mechanism;
step S80: and starting the windowing milling cone to drill the windowing side of the inner wall of the sleeve, and enabling the windowing milling cone to break through the sleeve and protrude.
2. The method of windowing a continuous tube according to claim 1, wherein in the step S20, a diameter tool is used to perform a sleeve diameter.
3. The method of claim 2, wherein the drift diameter tool is connected to a borehole wall scraping and milling tool, the tool comprising a screw motor, a scraper, a weighted drill rod, and a motor head, wherein one end of the screw motor is connected to the scraper, one end of the scraper is connected to the weighted drill rod, and one end of the weighted drill rod is connected to the motor head.
4. The coiled tubing windowing method of claim 1, wherein the positioning mechanism comprises a bottom plug and a logging tool, the upper end of the bottom plug is connected with the hanger, and the upper end of the hanger is connected with the logging tool.
5. The coiled tubing windowing method of claim 4, wherein one end of the logging tool is connected with a weighted drill rod, and a clamping groove is formed in the peripheral surface of the weighted drill rod.
6. The method of claim 1, wherein the tilt-guide mechanism comprises a positioning post that is insertable into the hanger.
7. The method for windowing a continuous tube according to claim 6, wherein the tilt-guide mechanism is internally provided with a position sensor.
8. The method of claim 1, wherein the milling cone comprises a screw motor, a weighted drill pipe, a motor head, a connector and a coiled tubing, wherein one end of the screw motor is connected with the weighted drill pipe, one end of the weighted drill pipe is connected with the motor head, the upper end of the motor head is connected with the connector, and the coiled tubing is connected with the connector.
9. The coiled tubing windowing method according to claim 1, wherein in the step S80, the operating range of the borehole wall milling tool is selected to be more than 10m and less than 10m of the windowing position.
10. A coiled tubing windowing method according to any of claims 1-9, wherein the whipstock orientation is fixed by a swivel joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211683191.7A CN118257522A (en) | 2022-12-27 | 2022-12-27 | Continuous tube windowing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211683191.7A CN118257522A (en) | 2022-12-27 | 2022-12-27 | Continuous tube windowing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118257522A true CN118257522A (en) | 2024-06-28 |
Family
ID=91605733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211683191.7A Pending CN118257522A (en) | 2022-12-27 | 2022-12-27 | Continuous tube windowing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118257522A (en) |
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2022
- 2022-12-27 CN CN202211683191.7A patent/CN118257522A/en active Pending
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