Reaming device for well drilling
By designing a hole retracting device for drilling, the hole retracting component with a rotating outer diameter of 350mm of the hole retracting drill bit is solved, and the risk of new holes in the wellbore expansion process during drilling construction in the North China Plain was achieved smoothly expanding the wellbore and the casing down to the top of the bedrock.
Patent Information
- Application Number
- CN202422110422.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-08-29
AI Technical Summary
During drilling construction, especially in the alluvial layer in the North China Plain, the casing often fails to enter the casing when the original wellbore is inserted into the casing, and there is a risk of new eyes being released during the eye expansion process.
An aperture retracting device for drilling is designed, the device including a double female joint, a first guide drill rod, an aperture retracting assembly and a second guide drill rod. By providing an aperture expansion assembly between the first guide drill rod and the second guide drill rod, including a guide short section and a hole expansion drill bit arranged on the guide short section, the rotation outer diameter of the hole expansion drill bit is 350 mm, which can effectively expand the wellbore.
The device can successfully expand the wellbore through the rotation of the reaming drill bit, avoiding the risk of new holes, and ensuring that the casing can go down to the top of the bedrock, solving technical problems in construction.
Smart Images
Figure CN222936675U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wellbore reaming in drilling, and particularly relates to a reaming device for drilling. Background Art
[0002] The strata occurrence conditions vary greatly in different regions of the North China Plain. In some areas, there is an overlying alluvial layer with a thickness of more than 500m. At the same time, the target layer for drilling construction is about 100m below the alluvial layer in vertical depth.
[0003] In the related art, during the construction of horizontal wells, it is necessary to build a well deviation in the alluvial layer and the well deviation reaches about 50 degrees. At this time, it often occurs that the casing cannot be lowered into the wellbore with the original diameter. Therefore, it is necessary to ream the original wellbore, but there is a risk of creating a new wellbore during the reaming process. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a reaming device for drilling, so as to solve the problem that new wellbores are likely to appear during the existing reaming process.
[0005] For this reason, an embodiment of the utility model proposes a reaming device for drilling.
[0006] According to the reaming device for drilling of the embodiment of the utility model, the drilling is constructed with a drill bit with a diameter of 311mm. The reaming device includes: a double-male joint, the lower end of the double-male joint is connected to a guiding drill bit; a first guiding drill pipe, the lower end of the first guiding drill pipe is connected to the upper end of the double-male joint, and the diameter of the first guiding drill pipe is 89mm; a reaming assembly, the reaming assembly includes a guiding short section and a reaming drill bit arranged on the guiding short section, the lower end of the guiding short section is connected to the upper end of the first guiding drill pipe, and the rotating outer diameter of the reaming drill bit is 350mm; a second guiding drill pipe, the lower end of the second guiding drill pipe is connected to the upper end of the guiding short section, and the upper end of the second guiding drill pipe is connected to the drilling construction equipment.
[0007] According to the reaming device of the utility model, by arranging a reaming assembly between the first guiding drill pipe and the second guiding drill pipe, the reaming assembly includes a guiding short section and a reaming drill bit arranged on the guiding short section, the rotating outer diameter of the reaming drill bit is 350mm, and the reaming drill bit can ream the original wellbore of the drilling through its own rotation, ensuring the smooth progress of the reaming process.
[0008] In some embodiments, the reaming device for drilling further includes: a circular iron plate, the circular iron plate is arranged between the lower end of the first guiding drill pipe and the upper end of the double-male joint, and the outer diameter of the circular iron plate is larger than the outer diameter of the double-male joint.
[0009] In some embodiments, the outer diameter of the double female joint is 172 mm.
[0010] In some embodiments, both ends of the first guide drill pipe are thick-diameter sections, the middle part of the first guide drill pipe is a thin-diameter section, the diameter of the thin-diameter section is 89 mm, and the diameter of the thick-diameter section is 172 mm.
[0011] In some embodiments, the second guide drill pipe includes a front section and a rear section. The front section is connected to the upper end of the guide short section, and the rear section is connected to the drilling construction equipment. The diameter of the front section is 172 mm, and the diameter of the rear section is 89 mm.
[0012] In some embodiments, the construction pressure of the drilling construction equipment is between 2 tons and 4 tons.
[0013] In some embodiments, the reaming device for drilling further includes: a directional hole monitoring instrument and a control system. The directional hole monitoring instrument is arranged inside the second guide drill pipe; the control system is arranged on the drilling construction equipment, and the control system is in data communication with the directional hole monitoring instrument.
[0014] In some embodiments, the reaming device for drilling further includes: a plurality of third guide drill pipes. The plurality of third guide drill pipes are connected to each other, and the plurality of third guide drill pipes are arranged between the upper end of the second guide drill pipe and the drilling construction equipment.
[0015] In some embodiments, the diameter of the third guide drill pipe is 89 mm.
[0016] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and do not limit the present disclosure. According to the following detailed description of exemplary embodiments with reference to the accompanying drawings, other features and aspects of the present disclosure will become clearer. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0018] Figure 1 is a schematic diagram of a reaming device according to an embodiment of the present invention.
[0019] Reference numerals:
[0020] Hole enlarging device 100, double male sub 10, first guide drill pipe 20, hole enlarging assembly 30, guide sub 31, hole enlarging bit 32, second guide drill pipe 40, circular iron plate 60, directional hole monitoring instrument 50. Detailed implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below in conjunction with specific implementation solutions. However, those skilled in the art should understand that the implementation solutions described below are only used to illustrate the present utility model and should not be regarded as limiting the scope of the present utility model. Based on the implementation solutions in the present utility model, all other implementation solutions obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.
[0022] It should be noted that in the North China Plain area, during the construction of horizontal wells, it is necessary to build an inclination in the alluvial layer and the well inclination reaches about 50 degrees. At this time, when a casing with a diameter of Φ244.5mm is lowered into a wellbore with a diameter of Φ311mm, the casing often cannot be lowered. Therefore, it is necessary to enlarge the original wellbore. There is a risk of new wellbores during the hole enlarging process. The inventor studied and processed an alluvial layer hole enlarging device to prevent new wellbores, and finally successfully lowered the casing to the top surface of the bedrock, solving the technical problem and laying a foundation for the subsequent construction.
[0023] As Figure 1 shown, the hole enlarging device 100 for drilling according to an embodiment of the present utility model includes a double male sub 10, a first guide drill pipe 20, a hole enlarging assembly 30, and a second guide drill pipe 40.
[0024] Drilling is carried out using a drill bit with a diameter of 311mm. The lower end of the double male sub 10 is connected to a guide bit (not shown). The lower end of the first guide drill pipe 20 is connected to the upper end of the double male sub 10, and the diameter of the first guide drill pipe 20 is 89mm.
[0025] The hole enlarging assembly 30 includes a guide sub 31 and a hole enlarging bit 32 provided on the guide sub 31. The lower end of the guide sub 31 is connected to the upper end of the first guide drill pipe 20, and the rotating outer diameter of the hole enlarging bit 32 is 350mm. The lower end of the second guide drill pipe 40 is connected to the upper end of the guide sub 31, and the upper end of the second guide drill pipe 40 is connected to the drilling construction equipment.
[0026] According to the hole enlarging device 100 of the present utility model, by providing a hole enlarging assembly 30 between the first guide drill pipe 20 and the second guide drill pipe 40, the hole enlarging assembly 30 includes a guide sub 31 and a hole enlarging bit 32 provided on the guide sub 31, and the rotating outer diameter of the hole enlarging bit 32 is 350mm. The hole enlarging bit 32 can enlarge the original wellbore of the drilling by its own rotation, ensuring the smooth progress of the hole enlarging process.
[0027] In a specific embodiment, an open casing is φ244.5mm, which has strong rigidity. Its drilling angle is greater than 50°. After construction with a φ311mm bit, it is rather difficult to directly run the next open casing. Meanwhile, there is still resistance when running the casing after reaming the wellbore. Therefore, a φ350mm bit is required for reaming. In terms of the drill string, all φ89mm drill pipes should be used, which are characterized by large flexibility and good extensibility. The previously used φ127mm drill pipes are not suitable as reaming drill tools due to reasons such as strong rigidity.
[0028] In some embodiments, as Figure 1 shown, the reaming device 100 for drilling further includes: a circular iron plate 60, which is arranged between the lower end of the first guide drill pipe 20 and the upper end of the double male joint 10. The outer diameter of the circular iron plate 60 is greater than the outer diameter of the double male joint 10.
[0029] It can be understood that by arranging the circular iron plate 60 between the lower end of the first guide drill pipe 20 and the upper end of the double male joint 10 and making a small cut in the circular iron plate 60, the water flow rate can be reduced, and the water pressure for flushing the settled sand can be increased.
[0030] In some embodiments, as Figure 1 shown, the outer diameter of the double male joint 10 is 172mm.
[0031] In some embodiments, as Figure 1 shown, both ends of the first guide drill pipe 20 are thick-diameter sections, and the middle part of the first guide drill pipe 20 is a thin-diameter section. The diameter of the thin-diameter section is 89mm, and the diameter of the thick-diameter section is 172mm.
[0032] It can be understood that both ends of the first guide drill pipe 20 are thick-diameter sections, and the middle part of the first guide drill pipe 20 is a thin-diameter section. Thus, it is beneficial to improve the connection stability of both ends of the first guide drill pipe 20.
[0033] In some embodiments, as Figure 1 shown, the second guide drill pipe 40 includes a front section and a rear section. The front section is connected to the upper end of the guide sub 31, and the rear section is connected to the drilling construction equipment. The diameter of the front section is 172mm, and the diameter of the rear section is 89mm.
[0034] It can be understood that the diameter of the front section of the second guide drill pipe 40 is 172mm. Thus, it is beneficial to improve the connection stability of the front section of the second guide drill pipe 40.
[0035] In some embodiments, as Figure 1 shown, the construction pressure of the drilling construction equipment is between 2 tons and 4 tons.
[0036] In some embodiments, as Figure 1As shown, the reaming device 100 for drilling further includes: a directional hole monitoring instrument 50 and a control system (not shown). The directional hole monitoring instrument 50 is disposed within the second guide drill pipe 40; the control system is disposed on the drilling construction equipment, and the control system is in data communication with the directional hole monitoring instrument 50.
[0037] It can be understood that the directional hole monitoring instrument 50 is an MWD while-drilling inclinometer. For orientation, the MWD while-drilling inclinometer is lowered to monitor real-time data, and timely reminders are given when significant changes in the inclinometer data are found.
[0038] In some embodiments, as Figure 1 As shown, the reaming device 100 for drilling further includes: a plurality of third guide drill pipes (not shown). The plurality of third guide drill pipes are connected to each other, and the plurality of third guide drill pipes are disposed between the upper end of the second guide drill pipe 40 and the drilling construction equipment.
[0039] It can be understood that during the reaming process, high-quality mud needs to be prepared throughout the process. First, the relatively poor mud in the well is displaced to enhance the effect of protecting the wellbore and prevent hole collapse. After each single reaming is completed, the drill string needs to be lifted by 1 m, and then circulated for about 10 minutes. After the cuttings are thoroughly returned with high-quality mud, the drill string is lifted to connect the single joints to prevent blockage due to excessive cuttings, so that the drill string cannot enter after being lowered again.
[0040] In some embodiments, as Figure 1 As shown, the diameter of the third guide drill pipe is 89 mm.
[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.
[0042] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.
[0043] In the present utility model, unless otherwise clearly defined or limited, terms such as "installation", "connection", "coupling", "fixing", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0044] In the present utility model, unless otherwise clearly defined or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher level than the second feature in terms of horizontal height. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower level than the second feature in terms of horizontal height.
[0045] In the present utility model, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.
[0046] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.
Claims
1. A hole reaming device for drilling, characterized in that: The drilling was carried out using a drill bit with a diameter of 311 mm. The reaming device included: A double female joint, the lower end of which is connected to the pilot drill bit; a first guide drill rod, the lower end of which is connected to the upper end of the double female joint, and the diameter of which is 89 mm; A reaming assembly, the reaming assembly comprising a guide subsection and a reaming drill bit arranged on the guide subsection, the lower end of the guide subsection is connected to the upper end of the first guide drill rod, and the rotating outer diameter of the reaming drill bit is 350 mm; A second guide drill rod, the lower end of the second guide drill rod is connected to the upper end of the guide short section, and the upper end of the second guide drill rod is connected to the drilling construction equipment.
2. The reaming device for drilling according to claim 1, characterized in that: Also includes: A circular iron plate is arranged between the lower end of the first guide drill rod and the upper end of the double female joint, and the outer diameter of the circular iron plate is greater than the outer diameter of the double female joint.
3. The reaming device for drilling according to claim 2, characterized in that: The outer diameter of the double female connector is 172 mm.
4. The reaming device for drilling according to claim 1, characterized in that: Both ends of the first guide drill rod are thick-diameter sections, and the middle portion of the first guide drill rod is a thin-diameter section. The diameter of the thin-diameter section is 89 mm, and the diameter of the thick-diameter section is 172 mm.
5. The reaming device for drilling according to claim 1, characterized in that: The second guide drill rod includes a front section and a rear section, the front section is connected to the upper end of the guide short section, and the rear section is connected to the drilling construction equipment. The diameter of the front section is 172 mm, and the diameter of the rear section is 89 mm.
6. The reaming device for drilling according to claim 1, characterized in that: The construction pressure of the drilling construction equipment is between 2 tons and 4 tons.
7. The reaming device for drilling according to claim 1, characterized in that: Also includes: A directional borehole monitoring instrument, wherein the directional borehole monitoring instrument is arranged in the second guide drill rod; A control system, wherein the control system is arranged on the drilling construction equipment, and the control system is in data communication with the directional hole monitoring instrument.
8. The reaming device for drilling according to claim 1, characterized in that: Also includes: A plurality of third guide drill rods are connected to each other and are arranged between the upper end of the second guide drill rod and the drilling construction equipment.
9. The reaming device for drilling according to claim 8, characterized in that: The diameter of the third guide drill rod is 89 mm.