Combined screw for vertical shaft drilling

Abstract

The utility model provides a combined screw for vertical shaft drilling, which belongs to the technical field of drilling equipment and comprises a first rod body, a second rod body, a plurality of wear-resistant components and a spiral component, the first rod body is provided with a first connecting part, and the second rod body is provided with a second connecting part. The second connecting part and the first connecting part are detachably connected, the distance between the second connecting part and the first connecting part can be adjusted, the multiple wear-resisting assemblies are connected to the outer walls of the first rod body and the second rod body and used for making contact and friction with the inner wall of a vertical shaft along with rotation of the first rod body and the second rod body, and the spiral assembly is connected to the outer circumferential walls of the first rod body and the second rod body and used for making contact and friction with the inner wall of a drilled hole. The spiral assembly is spirally arranged in the axial direction of the first rod body or the second rod body, and the spiral assembly and the multiple wear-resisting assemblies are arranged in a staggered mode. The combined screw rod for vertical shaft drilling has the technical effects that the length of the drill rod can be finely adjusted, and the combined screw rod can adapt to the operation of finely adjusting the drilling depth.

Description

Technical Field

[0001] The utility model belongs to the technical field of drilling equipment, and more specifically relates to a combined screw rod for vertical well drilling. Background Art

[0002] The auger rod is a drilling tool commonly used in drilling. During drilling, the auger rod is rotated by a driving motor, and the drill bit is installed at the front end of the auger rod to implement drilling work. Usually, the length of the auger rod used in vertical well drilling is fixed and cannot be slightly adjusted. In addition, the function of the drill rod is relatively single, and it is difficult to adapt to drilling work that requires slight adjustment of the drilling depth. At the same time, it will also affect the drilling quality of the well body and the production efficiency. Utility Model Content

[0003] The utility model aims to provide a combined screw rod for vertical shaft drilling, aiming to solve the technical problem that the length of the spiral drill rod used in vertical shaft drilling in the prior art cannot be adjusted and cannot adapt to the operation requiring micro-adjustment of the drilling depth.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a combined screw for vertical shaft drilling, comprising:

[0005] The first rod body is hollow and has a first connecting portion at one end;

[0006] The second rod body is hollow and has a second connecting portion at one end. The second rod body is in the axial extension direction of the first rod body. The second connecting portion is detachably connected to the first connecting portion. The distance between the end of the first rod body and the end of the second rod body can be adjusted.

[0007] A plurality of wear-resistant components are connected to the outer walls of the first rod body and the second rod body, and are used to contact the inner wall of the friction shaft as the first rod body and the second rod body rotate. The plurality of wear-resistant components are arranged in a spiral shape along the axial direction of the first rod body or the second rod body;

[0008] The spiral component is connected to the outer circumferential wall of the first rod body and the second rod body, and is used to contact the inner wall of the friction drill hole. The spiral component is arranged in a spiral shape along the axial direction of the first rod body or the second rod body, and is staggered with the multiple wear-resistant components.

[0009] In a possible implementation, one end of the first connecting portion is fixedly connected to the end of the first rod body, the second connecting portion is a groove opened at the end of the second rod body, the depth direction of the groove is along the axial direction of the second rod body, the first connecting portion is arranged in a rod shape and is coaxially arranged with the first rod body, the first connecting portion is inserted into the groove and the insertion depth in the groove can be adjusted.

[0010] In a possible implementation, the first connection portion is cross-shaped in a plane perpendicular to the axial direction thereof, the groove is cross-shaped in a plane perpendicular to the axial direction of the second rod body, and the first connection portion is adapted to be plugged into the groove.

[0011] In a possible implementation, the second rod body is provided with a plurality of through holes along its axial direction, the depth direction of the through holes is along the radial direction of the second rod body, the inner ends of the through holes are connected with the groove, a limit screw is passed through the through holes, and the inner end of the limit screw abuts against the first connecting part to limit the depth of the first connecting part in the groove.

[0012] In a possible implementation, a plurality of blind holes are provided on the first connection portion, the blind holes are threadedly connected with the limit screws, and the plurality of blind holes are evenly distributed along the axial direction of the first connection portion.

[0013] In a possible implementation, when a gap is formed between the end of the first rod body close to the first connecting part and the end of the second rod body close to the second connecting part, a dust ring is sleeved on one end of the first connecting part close to the first rod body, and the dust ring wraps the first connecting part and abuts against the end of the second rod body, and the dust ring is used to seal the gap.

[0014] In a possible implementation, the outer walls of the first rod body and the second rod body are both provided with mounting holes, the wear-resistant component is inserted into the mounting holes, and the distance between the wear-resistant component and the outer wall of the first rod body or the second rod body is adjustable.

[0015] In a possible implementation, the wear-resistant component includes:

[0016] A stud is screwed into the mounting hole, and the depth of the stud inserted into the mounting hole can be adjusted;

[0017] A PDC cutting tooth is connected to the outer end of the stud, and the PDC cutting tooth is used for cutting the inner wall of the shaft.

[0018] In a possible implementation, a spring is provided at the bottom of the mounting hole, and the spring is used to push the stud toward the outside of the mounting hole to limit the stud.

[0019] In a possible implementation manner, the outer wall of the first rod body or the second rod body is provided with a gauge teeth.

[0020] The utility model provides a combined screw rod for vertical shaft drilling. The beneficial effects are as follows: compared with the prior art, the utility model provides a combined screw rod for vertical shaft drilling, comprising a first rod body, a second rod body, a plurality of wear-resistant components and a spiral component, the first rod body is hollow and a first connecting portion is provided at one end; the second rod body is hollow and a second connecting portion is provided at one end, the second connecting portion is detachably connected to the first connecting portion in the axial extension direction of the first rod body, and the distance between the end of the first rod body and the end of the second rod body can be adjusted; a plurality of wear-resistant components are connected to the outer walls of the first rod body and the second rod body for adjusting the wear-resistant components. The first rod body and the second rod body rotate to contact the inner wall of the friction shaft, and multiple wear-resistant components are arranged in a spiral shape along the axial direction of the first rod body or the second rod body; the spiral component is connected to the outer circumferential wall of the first rod body and the second rod body, and is used to contact the inner wall of the friction borehole. The spiral component is arranged in a spiral shape along the axial direction of the first rod body or the second rod body, and is staggered with multiple wear-resistant components. This solves the technical problem that the length of the spiral drill rod used in shaft drilling cannot be adjusted and cannot adapt to operations that require slight adjustments to the drilling depth. It has the technical effect of being able to slightly adjust the length of the drill rod and being able to adapt to operations that require slight adjustments to the drilling depth. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the structure of a combined screw rod for vertical shaft drilling provided by an embodiment of the utility model;

[0023] Figure 2 A schematic diagram of the structure of the joint between the first rod body and the second rod body of a combined screw rod for vertical shaft drilling provided by an embodiment of the utility model;

[0024] Figure 3 A schematic diagram of the right end structure of a first rod body of a combined screw rod for vertical shaft drilling provided by an embodiment of the utility model;

[0025] Figure 4 for Figure 3 Right view of;

[0026] Figure 5 A schematic diagram of the left end structure of a second rod body of a combined screw rod for vertical shaft drilling provided by an embodiment of the utility model;

[0027] Figure 6A schematic structural diagram of the connection between the first rod body and the second rod body of a combined screw rod for vertical shaft drilling provided by another embodiment of the utility model;

[0028] Figure 7 This is a schematic diagram of the outer wall structure of a first rod body or a second rod body of a combined screw rod for vertical shaft drilling provided by another embodiment of the utility model.

[0029] Description of reference numerals:

[0030] 1. First rod body; 2. Second rod body; 3. Wear-resistant assembly; 31. Stud; 32. PDC cutting tooth; 33. Spring; 4. Screw assembly; 5. First connecting part; 6. Second connecting part; 7. Through hole; 8. Limit screw; 9. Blind hole; 10. Dustproof ring; 11. Mounting hole; 12. Gauge tooth. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] Please also read Figures 1 to 7 Now, a combined screw rod for vertical shaft drilling provided by the utility model is described. The combined screw for shaft drilling comprises a first rod body 1, a second rod body 2, a plurality of wear-resistant components 3 and a spiral component 4, wherein the first rod body 1 is hollow and a first connecting portion 5 is provided at one end; the second rod body 2 is hollow and a second connecting portion 6 is provided at one end, and the second connecting portion 6 is detachably connected to the first connecting portion 5 in the axial extension direction of the first rod body 1, and the distance between the end of the first rod body 1 and the end of the second rod body 2 can be adjusted; the plurality of wear-resistant components 3 are connected to the outer walls of the first rod body 1 and the second rod body 2, and are used to contact the inner wall of the friction shaft with the rotation of the first rod body 1 and the second rod body 2, and the plurality of wear-resistant components 3 are spirally arranged along the axial direction of the first rod body 1 or the second rod body 2; the spiral component 4 is connected to the outer circumferential walls of the first rod body 1 and the second rod body 2, and is used to contact the inner wall of the friction borehole, and the spiral component 4 is spirally arranged along the axial direction of the first rod body 1 or the second rod body 2, and is staggered with the plurality of wear-resistant components 3.

[0033] The utility model provides a combined screw rod for vertical shaft drilling. Compared with the prior art, a first rod body 1 and a second rod body 2 with adjustable distances are provided, and a wear-resistant component 3 is provided to assist in friction and cutting of the well wall, thereby solving the technical problem that the length of the spiral drill rod used in vertical shaft drilling cannot be adjusted and cannot adapt to operations requiring slight adjustments in drilling depth. The utility model has the technical effect of being able to slightly adjust the length of the drill rod and being able to adapt to operations requiring slight adjustments in drilling depth.

[0034] The materials of the first rod body 1 and the second rod body 2 in this embodiment are all materials used in the prior art for making spiral drill rods, so the utility model is easy to process and manufacture, and the multiple wear-resistant components 3 are installed on the first rod body 1 and the second rod body 2 later, and the installation and removal are also relatively easy and convenient. The spiral component 4 is welded on the first rod body 1 and the second rod body 2 later, and has the same function and principle as the spiral blades on the spiral drill rod in the prior art, which will not be described in detail in this embodiment. The outer diameter of the first rod body 1 is the same as the outer diameter of the second rod body 2, so that they can be combined and regarded as a whole screw drill tool, and then the drilling operation can be implemented. Compared with the spiral drill rod or screw rod in the prior art, the length of the utility model can be adjusted without adding an additional set of screw rods (the length of the added screw rods is longer and inconvenient for drilling operations; if the screw rods are not added, the drilling depth or position cannot be adjusted within a short distance, resulting in reduced drilling quality for the shaft). Therefore, by using the combined screw rod in this embodiment, the overall length of the drill rod can be adjusted within a short distance without connecting an additional screw rod. The length can be adjusted based on the combined screw rod itself, and the adjustment method is relatively simple and easy to operate, so that the drilling depth of the screw rod can be adjusted within a short distance, meeting the requirements of shaft drilling and improving the drilling quality.

[0035] In some embodiments, see Figures 1 to 7 , one end of the first connecting portion 5 is fixedly connected to the end of the first rod body 1, and the second connecting portion 6 is a groove opened at the end of the second rod body 2, the depth direction of the groove is along the axial direction of the second rod body 2, the first connecting portion 5 is arranged in a rod shape and is coaxially arranged with the first rod body 1, the first connecting portion 5 is inserted into the groove, and the insertion depth in the groove can be adjusted. In this embodiment, the lengths of the first rod body 1 and the second rod body 2 are not limited, the left end of the first rod body 1 (i.e., the end away from the first connecting portion 5) is a socket type, and the right end of the second rod body 2 (i.e., the end away from the second connecting portion 6) is a socket type, which is convenient for connection with other components (such as a drill bit, a driver, etc.), refer to the end structure and connection method of the spiral drill rod used in the prior art.

[0036] By inserting the first connecting part 5 into the groove and adjusting the insertion depth, the distance between the first rod body 1 and the second rod body 2 can be adjusted, thereby adjusting the total length of the combined screw rod. The adjusted position can be locked or fixed to prevent displacement or detachment during drilling.

[0037] In some embodiments, see Figures 1 to 7The first connecting portion 5 is cross-shaped on a plane perpendicular to its axial direction, and the groove is cross-shaped on a plane perpendicular to the axial direction of the second rod body 2, and the first connecting portion 5 is adapted to be plugged into the groove. The cross shape is equivalent to the cross-sectional shape of a cross-shaped screwdriver, and after being plugged into the groove, the connection with the second rod body 2 is relatively stable, so that the torque transmission between the first rod body 1 and the second rod body 2 is relatively stable, and the first connecting portion 5 will not be separated from or slip out of the groove.

[0038] In some embodiments, see Figures 1 to 7 The second rod body 2 is provided with a plurality of through holes 7 along its axial direction, and the depth direction of the through holes 7 is along the radial direction of the second rod body 2. The inner end of the through hole 7 is connected with the groove, and a limit screw 8 is passed through the through hole 7. The inner end of the limit screw 8 abuts against the first connecting part 5 to limit the depth of the first connecting part 5 in the groove. By providing a plurality of limit screws 8, the first connecting part 5 can be abutted and locked, so that the second rod body 2 and the first connecting part 5 are fixedly connected, so that the combined screw rod forms a whole. Along the circumferential direction of the second rod body 2, the plurality of through holes 7 are arranged in a circular array. Along the axial direction of the second rod body 2, the plurality of through holes 7 are arranged at equal intervals and avoid the spiral component 4. Similarly, the wear-resistant component 3 is also arranged to avoid the spiral component 4.

[0039] Preferably, the through hole 7 is a hole with an internal thread, and the limit screw 8 is a screw with an external thread. The external thread and the internal thread are threadedly connected to each other. By screwing the limit screw 8, the inner end of the limit screw 8 can be made to abut against or away from the first connecting part 5, thereby achieving locking and release of the first connecting part 5.

[0040] In order to achieve stable and firm fixation of the first connecting portion 5, in some embodiments, refer to Figures 1 to 7 The first connection part 5 is provided with a plurality of blind holes 9, which are threadedly connected with the limit screws 8, and the plurality of blind holes 9 are evenly distributed along the axial direction of the first connection part 5. By inserting the inner ends of the limit screws 8 into the blind holes 9 in a corresponding manner, the limit screws 8 fix the first connection part 5 in the groove, and the first connection part 5 will not slip out of the groove, thereby ensuring the connection effect and stability between them.

[0041] Preferably, the inner wall of the blind hole 9 is also provided with an internal thread, so that the internal thread and the limit screw 8 are screwed together, and the limit screw 8 can be screwed into the blind hole 9 by screwing, thereby fixing the first connecting portion 5. Conversely, by screwing the limit screw 8 in the opposite direction, it can be disengaged from the blind hole 9, and then from the through hole 7, thereby releasing the first connecting portion 5. At this time, the first connecting portion 5 can slip out of the groove, that is, the distance between the first rod body 1 and the second rod body 2 can be adjusted, thereby adjusting the overall length of the combined screw.

[0042] In some embodiments, see Figures 1 to 7When a gap is formed between the end of the first rod body 1 close to the first connection part 5 and the end of the second rod body 2 close to the second connection part 6, a dust ring 10 is sleeved on one end of the first connection part 5 close to the first rod body 1. The dust ring 10 wraps the first connection part 5 and abuts against the end of the second rod body 2. The dust ring 10 is used to block the gap. When the ends of the first rod body 1 and the second rod body 2 close to each other abut against each other, there is no gap at this time. When they do not abut against each other, there will be a gap. In order to reduce the entry of rock chips into the gap during the screw drilling process, the dust ring 10 is mounted on the first connection part 5, which can prevent rock chips from entering the gap, which is equivalent to filling or filling the gap. The outer diameter of the dust ring 10 is equal to or greater than the outer diameter of the first rod body 1.

[0043] According to the actual width of the gap, the number of dust rings 10 is appropriately set, and one can be set, such as Figure 1 As shown in ; you can also set multiple, such as Figure 6 As shown in FIG. 1 , a plurality of dust rings 10 are stacked one on top of another, and dust rings 10 of different thicknesses can be selected.

[0044] To achieve the fixation of the wear-resistant component, in some embodiments, refer to Figures 1 to 7 The outer walls of the first rod body 1 and the second rod body 2 are both provided with mounting holes 11, and the wear-resistant assembly 3 is inserted into the mounting holes 11. The distance between the wear-resistant assembly 3 and the outer wall of the first rod body 1 or the second rod body 2 can be adjusted. The height of the wear-resistant assembly 3 can be adjusted by screwing it, which is convenient for adjustment to achieve friction or cutting of the inner wall of the shaft.

[0045] In some embodiments, see Figures 1 to 7 The wear-resistant assembly 3 includes a stud 31 and a PDC cutting tooth 32. The stud 31 is screwed into the mounting hole 11. The depth of the stud 31 inserted into the mounting hole 11 can be adjusted. The PDC cutting tooth 32 is connected to the outer end of the stud 31. The PDC cutting tooth 32 is used to cut the inner wall of the shaft. The PDC cutting tooth 32 can achieve the effect of cutting the shaft wall and improve the drilling quality of the shaft wall. The height of the PDC cutting tooth 32 can be adjusted by screwing the stud 31, so as to facilitate the adjustment of the cutting degree of the shaft wall.

[0046] To prevent the stud 31 from naturally slipping out of the mounting hole 11, in some embodiments, see Figures 1 to 7 A spring 33 is provided at the bottom of the mounting hole 11, and the spring 33 is used to push the stud 31 toward the outside of the mounting hole 11 to limit the stud 31. By providing the spring 33, the stud 31 can be pushed up to prevent it from naturally slipping out of the mounting hole 11. Preferably, the inner wall of the mounting hole 11 is provided with an internal thread, which is screwed with the stud 31. The height of the PDC cutting tooth 32 or the insertion depth of the stud 31 in the mounting hole 11 can be adjusted by screwing.

[0047] In some embodiments, see Figures 1 to 7 The outer wall of the first rod body 1 or the second rod body 2 is provided with a gauge tooth 12. The gauge teeth 12 are multiple and are arranged in a spiral shape along the axial direction of the first rod body 1 or the second rod body 2, and the position of the gauge teeth 12 is avoided from the spiral component 4 and the wear-resistant component 3.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A combined screw for vertical shaft drilling, characterized in that: include: The first rod body is hollow and has a first connecting portion at one end; The second rod body is hollow and has a second connecting portion at one end. The second rod body is in the axial extension direction of the first rod body. The second connecting portion is detachably connected to the first connecting portion. The distance between the end of the first rod body and the end of the second rod body can be adjusted. A plurality of wear-resistant components are connected to the outer walls of the first rod body and the second rod body, and are used to contact the inner wall of the friction shaft as the first rod body and the second rod body rotate. The plurality of wear-resistant components are arranged in a spiral shape along the axial direction of the first rod body or the second rod body; The spiral component is connected to the outer circumferential wall of the first rod body and the second rod body, and is used to contact the inner wall of the friction drill hole. The spiral component is arranged in a spiral shape along the axial direction of the first rod body or the second rod body, and is staggered with the multiple wear-resistant components.

2. A combined screw rod for vertical shaft drilling as claimed in claim 1, characterized in that: One end of the first connecting portion is fixedly connected to the end of the first rod body, the second connecting portion is a groove opened at the end of the second rod body, the depth direction of the groove is along the axial direction of the second rod body, the first connecting portion is arranged in a rod shape and is coaxially arranged with the first rod body, the first connecting portion is inserted into the groove and the insertion depth in the groove can be adjusted.

3. A combined screw rod for vertical shaft drilling as claimed in claim 2, characterized in that: The first connecting portion is in a cross shape on a plane perpendicular to the axial direction thereof, the groove is in a cross shape on a plane perpendicular to the axial direction of the second rod body, and the first connecting portion is adapted to be plugged into the groove.

4. A combined screw rod for vertical shaft drilling as claimed in claim 2, characterized in that: The second rod body is provided with a plurality of through holes along its axial direction, and the depth direction of the through holes is along the radial direction of the second rod body. The inner ends of the through holes are connected with the grooves, and a limiting screw is passed through the through holes. The inner ends of the limiting screws abut against the first connecting part to limit the depth of the first connecting part in the groove.

5. A combined screw rod for vertical shaft drilling as claimed in claim 4, characterized in that: The first connection portion is provided with a plurality of blind holes, the blind holes are threadedly connected with the limit screws, and the plurality of blind holes are evenly distributed along the axial direction of the first connection portion.

6. A combined screw rod for vertical shaft drilling as claimed in claim 1, characterized in that: When a gap is formed between the end of the first rod body close to the first connecting part and the end of the second rod body close to the second connecting part, a dust ring is sleeved on one end of the first connecting part close to the first rod body, and the dust ring wraps the first connecting part and abuts against the end of the second rod body, and the dust ring is used to seal the gap.

7. A combined screw rod for vertical shaft drilling as claimed in claim 1, characterized in that: The outer walls of the first rod body and the second rod body are both provided with mounting holes, the wear-resistant component is inserted into the mounting holes, and the distance between the wear-resistant component and the outer wall of the first rod body or the second rod body is adjustable.

8. A combined screw rod for vertical shaft drilling as claimed in claim 7, characterized in that: The wear-resistant component comprises: A stud is screwed into the mounting hole, and the depth of the stud inserted into the mounting hole can be adjusted; A PDC cutting tooth is connected to the outer end of the stud, and the PDC cutting tooth is used for cutting the inner wall of the shaft.

9. A combined screw rod for vertical shaft drilling as claimed in claim 8, characterized in that: A spring is arranged at the bottom of the mounting hole, and the spring is used to push the stud toward the outside of the mounting hole to limit the stud.

10. A combined screw rod for vertical shaft drilling as claimed in claim 1, characterized in that: The outer wall of the first rod body or the second rod body is provided with a gauge protection tooth.

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