CN217538581U - Underground crushing short joint and underground crushing tool - Google Patents
Underground crushing short joint and underground crushing tool Download PDFInfo
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- CN217538581U CN217538581U CN202220801327.9U CN202220801327U CN217538581U CN 217538581 U CN217538581 U CN 217538581U CN 202220801327 U CN202220801327 U CN 202220801327U CN 217538581 U CN217538581 U CN 217538581U
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Abstract
The utility model belongs to the technical field of the probing, specifically disclose a broken nipple joint for in pit. The connector comprises a body, wherein the body comprises an upper connector and a lower connector. The cutting mechanism is arranged between the upper joint and the lower joint and comprises a first spiral blade part, a second spiral blade part and a chip groove. The first helical blade portions and the second helical blade portions are alternately arranged on the outer circumference of the body in the circumferential direction. Wherein the second helical blade portion includes a first minor cutting face, and second and third minor cutting faces disposed downstream of the first minor cutting face. Wherein the first minor cutting face comprises a planar surface and a beveled surface disposed downstream of the planar surface. Furthermore, the utility model discloses still disclose a crushing tool that is used for in pit. The utility model discloses can solve the problem that falls piece and well undergauge in the well effectively to improve the security of drilling operation, and reduce the drilling cost.
Description
Technical Field
The utility model relates to a probing technical field specifically relates to a broken nipple joint for in pit to and a crushing tool for in pit.
Background
With the development of oil and gas exploration to deeper and harder formations, the requirements for drilling are also increasing. In the well in the later development stage, a stratum section with poor stability of the well wall is often encountered, and the phenomena of diameter reduction and block falling occur in the well due to the problems of the well wall, so that the problem of drill tool jamming occurs in the drilling process.
CN110792396A discloses a composite tool for horizontal well reaming and rock debris removal, which mainly comprises a columnar body, a grinding tool with diamond embedded in a section of the middle part, spiral cutting blades with opposite directions and symmetrical upper and lower ends, both designed into V-shaped palm blades, and a diamond embedded tool with grinding property in the middle part of the two spiral blades. However, the composite tool has high processing difficulty and high processing cost.
However, there is still no device in the prior art that can solve the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a broken nipple joint for in pit, it is through setting up plane and inclined plane on first main spiral cutter wing part to the area of contact between the rock mass in the increase well and two adjacent second spiral cutter wing parts, and then improve the efficiency of broken rock operation. Furthermore, the utility model discloses can solve the problem that falls piece and well undergauge in the well effectively to improve the security of drilling operation, and reduce the drilling cost.
According to a first aspect of the present invention, there is provided a crushing sub for use in a well, comprising a body, the body comprising an upper joint for connection with an upper drilling tool, and a lower joint for connection with a lower drilling tool; and a cutting mechanism disposed between the upper joint and the lower joint, wherein the cutting mechanism includes first and second helical blade portions, and a flute disposed between the first and second helical blade portions, wherein the first and second helical blade portions are alternately disposed on an outer circumference of the body in a circumferential direction; the second helical blade wing portion includes a first minor cutting face disposed at an upstream end, and second and third minor cutting faces disposed downstream of the first minor cutting face, wherein the first minor cutting face includes a plane and a chamfer disposed downstream of the plane.
In one embodiment, L is the difference between the outer radius of the cutting mechanism and the radius of the body, L being the difference between the outer radius of the cutting mechanism and the outer radius of the plane 1 =2/3L, the slope forming an inclination angle in the range of 25 ° to 35 °.
In one embodiment, the second minor cutting surface is configured as a cylindrical surface and the third minor cutting surface is configured as a circular arc surface.
In one embodiment, the first helical blade portion includes a first main cutting surface, a second main cutting surface, and a third main cutting surface arranged in this order, wherein the first main cutting surface and the third main cutting surface are both configured as circular arc surfaces, and the second main cutting surface is configured as a cylindrical surface.
In one embodiment, the first, second, and third major cutting faces have the same radius of curvature.
In one embodiment, the first helical blade portion comprises a conically configured cutting tooth comprising a first main cutting tooth disposed on the first main cutting face and a second main cutting tooth disposed on the second main cutting face and a third main cutting face, wherein the first main cutting tooth is longer than the second main cutting tooth.
In one embodiment, the second helical blade portion comprises cutting teeth configured in a wedge shape, the cutting teeth comprising a first minor cutting tooth disposed on the first minor cutting face, and a second minor cutting tooth disposed on the second and third minor cutting faces, wherein the first minor cutting tooth is longer than the second minor cutting tooth.
In one embodiment, the tip angle α of the first primary cutting tooth and the first secondary cutting tooth is in the range of 60 ° to 80 °; the positive tip angle β of the second primary cutting tooth and the second secondary cutting tooth is in the range of 40 ° to 45 °; the lateral tip angle γ of the second primary cutting tooth and the second secondary cutting tooth is in the range of 65 ° to 75 °.
According to a second aspect of the utility model, a broken instrument for in pit is provided, including the stabilizer to and through the lower part drilling tool with what the stabilizer was connected is according to as above be used for broken nipple joint in pit.
In one embodiment, the stabilizer has an outer diameter greater than an outer diameter of the cutting mechanism.
Compared with the prior art, the utility model has the advantages of: the utility model discloses can be through setting up plane and inclined plane on first main spiral cutter wing part to the area of contact between piece and two adjacent second spiral cutter wing parts in the increase well, and then improve the efficiency of broken rock operation. The utility model discloses still through adopting the profile of tooth of these two kinds of differences of conical and wedge for a broken nipple joint in the pit can realize the probing work to the rock mass in the well and the wall of a well respectively. Furthermore, the utility model discloses can solve the problem that falls piece and well undergauge in the well effectively to improve the security of drilling operation, and reduce the drilling cost.
Drawings
The invention will be described in detail below with reference to the attached drawings, in which:
figure 1 schematically shows the structure of a crushing sub for use downhole according to the present invention;
fig. 2 schematically shows a structure for a crushing tool for downhole use according to the present invention;
fig. 3 is a cross-sectional view of a crushing sub for use downhole according to the present invention;
fig. 4 is a schematic view of a cutting tooth for use in a downhole crushing sub according to the present invention, particularly showing the structure of a first primary cutting tooth and a first secondary cutting tooth;
fig. 5 is a schematic view of a cutting tooth for use in a downhole crushing sub according to the present invention, particularly showing the positive configuration of a second primary cutting tooth and a second secondary cutting tooth;
fig. 6 is according to the utility model discloses a lateral structure that is arranged in the cutting tooth of broken nipple joint in the pit, specific second main cutting tooth and the vice cutting tooth of second that shows.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings. For ease of understanding, in this specification, the directional term "upstream" or the like refers to a direction near the wellhead, i.e., the direction of the top end in fig. 1. The directional term "downstream" or the like refers to a direction away from the wellhead, i.e., the direction of the bottom end in FIG. 1.
Fig. 1 schematically shows a structure of a crushing sub 100 for use downhole according to the present invention. As shown in fig. 1, according to a first aspect of the present invention, there is provided a crushing sub 100 for downhole use, mainly comprising a body 10. The body 10 includes an upper fitting 20 disposed at an upstream end and a lower fitting 30 disposed at a downstream end. Wherein the top end of the upper joint 20 is provided with a connecting thread for connection with a corresponding thread of the upper drill 1 (shown in fig. 2). The bottom end of the lower sub 30 is provided with a thread for a corresponding threaded connection with the lower drill 2 (shown in fig. 2).
According to the present invention, as shown in fig. 1, the body 10 further includes a cutting mechanism 40 disposed between the upper joint 20 and the lower joint 30. The cutting mechanism 40 includes a first helical blade portion 50, a second helical blade portion 60, and a flute 70. According to an embodiment of the present invention, the first helical blade parts 50 and the second helical blade parts 60 are alternately disposed on the outer circumference of the body 10 in the circumferential direction. In this way, the crushing sub 100 for downhole use drives the body 10 to rotate by the upper drill 1 during downhole drilling, further driving the first helical blade part 50 and the second helical blade part 60 to rotate, thereby performing rock breaking operation in the well. The junk slots 70 are arranged between the first helical blade part 50 and the second helical blade part 60 and are used for conveying rock debris generated after the first helical blade part 50 and the second helical blade part 60 break rock to the downhole. Preferably, the junk slots 70 are U-shaped junk slots. Thus, by enlarging the depth of the groove, the space for storing the debris is increased, thereby preventing the occurrence of clogging due to excessive debris during drilling.
According to the present invention, as shown in fig. 1, the second helical blade portion 60 includes a first minor cutting face 61, a second minor cutting face 62, and a third minor cutting face 63 in this order. Wherein the first minor cutting face 61 is provided upstream of the second and third minor cutting faces 62, 63 for receiving a rock mass falling within the well. The contents of which are described below. The second minor cutting face 62 is disposed intermediate the first minor cutting face 61 and the third minor cutting face 63. The second secondary cutting face 62 is configured as a cylindrical surface for engaging the borehole wall. Thus, when the crushing short joint 100 used in the well is used for scraping the well wall, the structure in the well can be effectively prevented from being damaged. The third minor cutting surface 63 is configured as a circular arc surface. In this way, the contact area between the third minor cutting face 63 and the debris can be increased, and the fracturing sub 100 for downhole use can be drilled downhole more easily.
According to the present invention, as shown in fig. 1, the first minor cutting face 61 includes a flat surface 612 disposed upstream and a bevel surface 613 disposed downstream and fixedly connected to the flat surface 612. Wherein the flats 612, the inclined surfaces 613 and the walls of the well define a cavity that can more easily receive and support a falling piece of rock within the well.
Fig. 3 is a cross-sectional view of a crushing sub 100 for use downhole according to the present invention. According to an embodiment of the present invention, as shown in fig. 3, the bevel 613 forms a bevel angle θ in the range of 25 ° to 35 °. This allows two adjacent first major cutting surfaces 51 (described below) to form a larger recess with the borehole wall than the cavity. In this way, the contact area between the rock mass and the first main cutting face 51 is increased, thereby effectively improving the working efficiency of the crushing sub 100 for downhole use.
According to the present invention, the first helical blade portion 50 includes a first main cutting face 51, a second main cutting face 52, and a third main cutting face 53, which are provided in this order. The first main cutting surface 51 is configured as a circular arc surface. In this way, the crushing sub 100 for downhole use is enabled to enlarge the contact area between the first main cutting face 51 and the upper rock mass during tripping, so that the crushing sub 100 for downhole use can be moved upwards more easily. The second major cutting face 52 is configured as a cylindrical surface for engaging the borehole wall. Therefore, the structure in the well can be effectively prevented from being damaged when the scraping operation is carried out on the well wall. The third main cutting surface 53 is configured as a circular arc surface. In this way, the crushing sub 100 for downhole use can enlarge the contact area between the third main cutting face 53 and the cuttings during drilling, so that the crushing sub 100 for downhole use can move downward more easily. In one embodiment of the present invention, the first main cutting face 51, the second main cutting face 52 and the third main cutting face 53 have the same radius of curvature. Therefore, the underground crushing short joint 100 is easier to process in the manufacturing process, and the production efficiency is effectively improved.
According to the present invention, as shown in fig. 1, the first helical blade part 50 includes a first main cutting tooth 511 provided on the first main cutting face 51, and a second main cutting tooth 54 provided on the second main cutting face 52 and the third main cutting face 53, respectively. Wherein the first main cutting tooth 511 is longer than the second main cutting tooth 54. In this way, the first main cutting tooth 511 is able to break a rock mass in the well faster when the fracturing sub 100 for downhole is operating in the well; the second primary cutting tooth 54 can more easily avoid damaging structures in the well.
According to the present invention, as shown in fig. 1, the second helical blade portion 60 includes a first pair of cutting teeth 611 provided on the first pair of cutting faces 61, and a second pair of cutting teeth 64 provided on the second pair of cutting faces 62 and the third pair of cutting faces 63. Wherein the first secondary cutting tooth 611 is longer than the second secondary cutting tooth 64. In this way, when the crushing sub 100 for downhole use is operating in a well, the first secondary cutting teeth 611 are able to crush the rock mass in the well more; second pair of cutting teeth 64 can be easier avoiding damaging structures in the well.
In one embodiment of the present invention, the first main cutting tooth 511 and the first auxiliary cutting tooth 611 are both provided as conical cutting teeth. Preferably, the length of this cutting tooth is in the range of 3 to 5 mm; the tooth diameter is in the range of 8 to 12 mm; the tooth spacing is in the range of 20 to 25 mm. In addition, the cutting tooth has better abrasion resistance and higher strength, and can be suitable for formation sections with poor stability in a well. Like this, through reducing the tooth footpath, improve cloth tooth density and accelerate cutting frequency to use broken nipple joint 100 in the pit can carry out abundant extrusion and broken to the rock mass in the well.
In one embodiment of the present invention, the second primary cutting tooth 54 and the second secondary cutting tooth 64 are both provided as wedge-shaped cutting teeth. Preferably, the length of this cutting tooth is in the range of 2 to 4 mm; in the range of 18 to 22mm at the tooth diameter; the tooth spacing is in the range of 40 to 45 mm. Therefore, the cutting teeth can provide auxiliary cutting for the crushing short joint 100 used in the well, and can further repair the well wall, so that the stability of the structure in the well is improved.
Fig. 4 is a schematic diagram of a cutting tooth for use in the downhole crushing sub 100 according to the present invention, specifically showing the structure of the first main cutting tooth 511 and the first auxiliary cutting tooth 611. In one embodiment of the present invention, as shown in fig. 4, the tip angles α of the first main cutting tooth 511 and the first auxiliary cutting tooth 611 are both in the range of 60 ° to 80 °. Thus, when the rock block falls in the process of tripping the drill, the first primary cutter 511 and the first secondary cutter 611 can more easily crush the rock mass, thereby reducing the risk of sticking.
Fig. 5 is a schematic diagram of a cutting tooth for use in a downhole crushing sub 100 according to the present invention, specifically showing the forward structure of the second main cutting tooth 54 and the second auxiliary cutting tooth 64. Fig. 6 is a schematic diagram of a cutting tooth for use in a downhole crushing sub 100 according to the present invention, specifically showing the lateral structure of the second main cutting tooth 54 and the second auxiliary cutting tooth 64. In one embodiment of the present invention, as shown in fig. 5 and 6, the forward tooth tip angle β of the second primary cutting tooth 54 and the second secondary cutting tooth 64 is in the range of 40 ° to 45 °; the lateral tip angle γ of the second primary cutting tooth 54 and the second secondary cutting tooth 64 is in the range of 65 ° to 75 °. Therefore, the damage to the structure in the well can be effectively avoided in the process of tripping the drill.
In one embodiment of the present invention, as shown in fig. 3, L is the difference between the outer radius of the cutting mechanism 40 and the radius of the body 10, L 1 Is the difference between the outer radius of the cutting mechanism 40 and the outer radius of the flat 612. Wherein L is 1 And (4) =2/3L. In this way, the fracturing sub 100 used downhole can only repair the borehole wall through the second main cutting face 52 and the second auxiliary cutting face 62, and therefore the fracturing sub 100 used downhole during tripping can be effectively prevented from damaging the structure in the borehole.
In a second aspect of the present invention, a downhole crushing tool 200 is provided, which comprises a stabilizer 3 and a sub 100 as described above. Wherein a sub 100 for downhole use is connected to a stabiliser 3 by a lower drilling tool 2. Preferably, the outer diameter of the stabilizer 3 is in the range of 311 to 406 mm.
In one embodiment of the present invention, the outer diameter of the cutting mechanism 40 is larger than the outer diameter of the stabilizer 3. In this way, on the one hand, damage to the structure inside the well due to bending of the body 10 during drilling can be effectively avoided. On the other hand, the risk of sticking the downhole crushing tool 200 during the borehole diameter reduction can be effectively reduced.
The utility model discloses can be through setting up plane 612 and inclined plane 613 on first main spiral wing of blade part 50 to the area of contact between the rock mass in the increase well and two adjacent second spiral wing of blade parts 60, and then improve the efficiency of broken rock operation. The utility model discloses still through adopting the profile of tooth of these two kinds of differences of conical and wedge for a broken nipple joint 100 in the pit can realize the probing work to the rock mass in the well and the wall of a well respectively. Furthermore, the utility model discloses can solve the problem that falls piece and well undergauge in the well effectively to improve the security of drilling operation, and reduce the drilling cost.
The above are only preferred embodiments of the present invention, but the scope of the present invention is not limited thereto. Those skilled in the art can easily make changes or variations within the scope of the present disclosure, and such changes or variations are intended to be covered by the scope of the present disclosure. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A fragmentation sub for use downhole, comprising:
a body (10), said body (10) comprising an upper joint (20) for connection with an upper drill (1), and a lower joint (30) for connection with a lower drill (2); and
a cutting mechanism (40) disposed between the upper joint (20) and the lower joint (30), the cutting mechanism (40) including a first helical blade portion (50) and a second helical blade portion (60), and a junk slot (70) disposed between the first helical blade portion (50) and the second helical blade portion (60), wherein the first helical blade portion (50) and the second helical blade portion (60) are alternately disposed on an outer circumference of the body (10) in a circumferential direction;
wherein the second helical blade portion (60) comprises a first minor cutting face (61) disposed at an upstream end, and a second minor cutting face (62) and a third minor cutting face (63) disposed downstream of the first minor cutting face (61), the first minor cutting face (61) comprising a planar surface (612), and a beveled surface (613) disposed downstream of the planar surface (612).
2. The fracturing sub for downhole according to claim 1, wherein L is the difference between the outer radius of the cutting means (40) and the radius of the body (10), L being the difference between the outer radius of the cutting means (40) and the outer radius of the plane (612) 1 =2/3L, the inclination angle formed by the slope (613) is in the range of 25 ° to 35 °.
3. The fracturing sub for downhole according to claim 2, characterized in that the second minor cutting face (62) is configured as a cylindrical face and the third minor cutting face (63) is configured as a circular arc face.
4. The fracturing sub for downhole according to claim 3, wherein the first helical blade portion (50) comprises a first main cutting face (51), a second main cutting face (52), and a third main cutting face (53) arranged in sequence, wherein the first main cutting face (51) and the third main cutting face (53) are each configured as a circular arc face, and the second main cutting face (52) is configured as a cylindrical face.
5. The fracturing sub for downhole according to claim 4, wherein the first (51), second (52) and third (53) main cutting faces have the same radius of curvature.
6. The fracturing sub for downhole according to claim 5, wherein the first helical blade portion (50) comprises cutting teeth configured in a conical shape, the cutting teeth comprising a first main cutting tooth (511) provided on the first main cutting face (51) and a second main cutting tooth (54) provided on the second main cutting face (52) and a third main cutting face (53), wherein the first main cutting tooth (511) is longer than the second main cutting tooth (54).
7. The fracturing sub for downhole according to claim 6, wherein the second helical blade portion (60) comprises cutting teeth configured in a wedge shape, comprising a first set of cutting teeth (611) provided on the first set of cutting faces (61), and a second set of cutting teeth (64) provided on the second set of cutting faces (62) and a third set of cutting faces (63), wherein the first set of cutting teeth (611) is longer than the second set of cutting teeth (64).
8. The fracturing sub for downhole according to claim 7, characterized in that the tip angle α of the first primary cutting tooth (511) and the first secondary cutting tooth (611) is in the range of 60 ° to 80 °; a forward tip angle β of the second primary cutting tooth (54) and the second secondary cutting tooth (64) is in the range of 40 ° to 45 °; the lateral tip angle γ of the second primary cutting tooth (54) and the second secondary cutting tooth (64) is in the range of 65 ° to 75 °.
9. A crushing tool for downhole comprising a stabilizer (3), and a crushing sub for downhole according to any of claims 1-8 connected to the stabilizer (3) by a lower drill string (2).
10. A crushing tool for downhole according to claim 9, wherein the stabilizer (3) has an outer diameter larger than the outer diameter of the cutting mechanism (40).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220801327.9U CN217538581U (en) | 2022-04-08 | 2022-04-08 | Underground crushing short joint and underground crushing tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220801327.9U CN217538581U (en) | 2022-04-08 | 2022-04-08 | Underground crushing short joint and underground crushing tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217538581U true CN217538581U (en) | 2022-10-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220801327.9U Active CN217538581U (en) | 2022-04-08 | 2022-04-08 | Underground crushing short joint and underground crushing tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217538581U (en) |
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2022
- 2022-04-08 CN CN202220801327.9U patent/CN217538581U/en active Active
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