CN219754471U - PDC-roller hybrid drill bit - Google Patents
PDC-roller hybrid drill bit Download PDFInfo
- Publication number
- CN219754471U CN219754471U CN202223610458.8U CN202223610458U CN219754471U CN 219754471 U CN219754471 U CN 219754471U CN 202223610458 U CN202223610458 U CN 202223610458U CN 219754471 U CN219754471 U CN 219754471U
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- China
- Prior art keywords
- roller
- pdc
- drill bit
- seal
- assembly
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- 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.)
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- 230000015572 biosynthetic process Effects 0.000 claims abstract description 25
- 239000011435 rock Substances 0.000 claims abstract description 22
- 230000036346 tooth eruption Effects 0.000 claims abstract description 20
- 230000007547 defect Effects 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 9
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 7
- 229920000459 Nitrile rubber Polymers 0.000 claims description 5
- 229910052582 BN Inorganic materials 0.000 claims description 3
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 3
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 229920001973 fluoroelastomer Polymers 0.000 claims description 3
- 229910001105 martensitic stainless steel Inorganic materials 0.000 claims description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 3
- 238000005728 strengthening Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 claims description 2
- 238000005755 formation reaction Methods 0.000 description 23
- 238000005553 drilling Methods 0.000 description 14
- 230000000712 assembly Effects 0.000 description 6
- 238000000429 assembly Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005271 boronizing Methods 0.000 description 1
- 238000005256 carbonitriding Methods 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model relates to a PDC-roller hybrid drill bit which comprises a body connected to a drill string, a PDC component arranged on the body, a roller component arranged on the body, and a roller component, wherein the PDC component comprises a blade, a plurality of cutting teeth uniformly arranged on the blade, and the roller component arranged on the body, the roller component comprises a palm arm fixedly connected to the body, a roller connected to the palm arm, and a roller sleeved on the roller and capable of rotating relative to the roller, and a plurality of roller teeth are uniformly arranged on the outer wall of the roller. Wherein the roller teeth are configured to have a height above the cutting teeth such that the roller is capable of crushing rock by rotation before the PDC assembly cuts formation rock, thereby creating crack defects in the uncrushed rock.
Description
Technical Field
The utility model relates to the field of petroleum engineering, in particular to a PDC-roller hybrid drill bit.
Background
PDC-roller bits are one of the bits commonly used in drilling operations and have good drilling results in heterogeneous formations.
However, during the use of the PDC-roller drill bit, operators find that vibration is likely to occur between the roller and the roller of the PDC-roller drill bit, so that the roller and the sealing element between the roller and the roller are damaged, and the drilling stability and the service life of the PDC-roller drill bit are seriously reduced.
Disclosure of Invention
Aiming at the technical problems, the utility model aims to provide a PDC-roller hybrid drill bit. The PDC-roller hybrid drill bit can improve the drilling stability and the service life of the PDC-roller drill bit.
According to the utility model, the PDC-roller hybrid drill bit comprises a body connected to a drill string, a PDC assembly arranged on the body, and a roller assembly arranged on the body, wherein the PDC assembly comprises a cutter blade, a plurality of cutting teeth uniformly arranged on the cutter blade, and the roller assembly comprises a palm arm fixedly connected to the body, a roller connected to the palm arm, and a roller sleeved on the roller and capable of rotating relative to the roller, and the outer wall of the roller is uniformly provided with a plurality of roller teeth.
Wherein the roller teeth are configured to have a height above the cutting teeth such that the roller is capable of crushing rock by rotation before the PDC assembly cuts formation rock, thereby creating crack defects in the uncrushed rock.
In a preferred embodiment, a sealing component is further arranged between the roller and the roller, and the sealing component is sleeved on the roller and is abutted against the roller.
In a preferred embodiment, the seal assembly includes first and second abutting seals, the connection faces of the first and second seals being configured as cut-away faces, and,
and elastic supporting members which are arranged at two ends of the sealing member and are connected with the sealing member.
In a preferred embodiment, the first and second seals are made of martensitic stainless steel, tungsten carbide, ceramic, cemented carbide, diamond, cubic boron nitride or silicon nitride material and the support is made of hydrogenated nitrile rubber, nitrile rubber or fluororubber material.
In a preferred embodiment, the outer walls of the roller, the roller and the palm arm are also respectively coated with a reinforcing layer.
In a preferred embodiment, the strengthening layer is made of tungsten carbide material.
In a preferred embodiment, the outer walls of the roller and the roller are nitrided so that the roller and the roller are internally nitrided.
In a preferred embodiment, the number of the sealing members is two, and the two supporting members are respectively arranged at two ends of the supporting members and are connected with the supporting members at the same time.
In a preferred embodiment, a central flow passage in fluid communication with the drill string is provided in the interior of the body, the flow passage having a nozzle extending to the blades so that fluid within the drill string can be injected at the blades and discharged.
In a preferred embodiment, the tooth height of the roller tooth is set to be 0.01-5mm larger than the tooth height of the cutting tooth.
Drawings
The present utility model will be described below with reference to the accompanying drawings.
FIG. 1 shows a schematic diagram of a PDC-roller hybrid drill bit in accordance with one embodiment of the present utility model.
In the present utility model, all of the figures are schematic drawings which are intended to illustrate the principles of the utility model only and are not to scale.
Detailed Description
The utility model is described below with reference to the accompanying drawings. Hereinafter, the term "upper end" or the like means an end near the wellhead, and the term "lower end" or the like means an end far from the wellhead.
FIG. 1 shows a schematic diagram of a PDC-roller hybrid drill bit 100 in accordance with one embodiment of the present utility model. As shown in fig. 1, the PDC-roller hybrid drill bit 100 includes a body 10. The upper end of the body 10 is provided with a connection joint 11. The body 10 can be connected to a drill string (not shown) via the connection sub 11, lowered into the well with the drill string and rotated circumferentially with the drill string.
As shown in fig. 1, a PDC assembly 20 is further provided at the lower end of the body 10. The PDC assembly 20 includes blades 22 and cutting teeth 24 disposed on the blades 22. The plurality of cutting teeth 24 are arranged in plural, and the plurality of cutting teeth 24 are uniformly disposed on the blade 22.
Thus, when the body 10 rotates synchronously with the drill string, the blades 22 and the cutting teeth 24 on the blades 22 can be driven to rotate relative to the stratum, so that the cutting teeth 24 can cut the stratum, and drilling operation can be performed.
As shown in fig. 1, a roller assembly 30 is further provided at the lower end of the body 10. The roller assembly 30 includes a palm arm 32 fixedly attached to the body 10. The palm 32 is provided on the outer peripheral surface 13 of the body 10 and is arranged along the axial direction of the body 10.
A roller 34 is further provided at the lower end of the palm arm 32, the roller 34 being provided to extend in the radial direction of the body 10. Meanwhile, a roller 36 is provided on the roller 34. The roller 36 is generally spherical in configuration. Inside the roller 36, a hole 361 is provided to allow the roller 34 to be inserted, so that the roller 36 can be fitted over the roller 34.
As shown in fig. 1, the roller 36 is further provided with roller teeth 362. Thus, as the body 10 rotates, the roller 36 can break up the formation rock through the roller teeth 362, thereby reducing the hardness of the formation rock.
As shown in fig. 1, the PDC assembly 20 and the roller assembly 30 are disposed at the lower end of the body 10. Meanwhile, the PDC assembly 20 and the roller assembly 30 are provided in one or more. The one or more PDC assemblies 20 and roller assemblies 30 are disposed in spaced relation along the circumference of the body 10. Thus, when the body 10 rotates synchronously with the drill string, the PDC assembly 20 and the roller assembly 30 can periodically and alternately perform cutting operations on the stratum at the same position.
In the present utility model, the roller teeth 362 are provided to have a height higher than the cutting teeth 24. The height difference between the roller teeth 362 and the cutting teeth 24 is preferably set to 0.01-5mm. Thus, during drilling, the roller teeth 362 may first contact the formation and fracture the formation rock, thereby forming flaws such as cracks in the uncrushed formation to reduce the fracture strength of the formation rock. When the breaking strength of the formation rock is reduced, the cutting teeth 24 cut the broken and weakened formation rock.
With this arrangement, the roller teeth 362 will locally fracture and partially fracture the formation rock before the cutter teeth 24 contact the formation. Compared with the traditional drilling mode, the workload and the stress of the drilling device are greatly reduced, the abrasion to the roller teeth 362 in the drilling process is reduced, and the service life of the roller teeth 362 is prolonged.
On the other hand, because the cutting teeth 24 cut the weakened stratum rock, the strength of the stratum rock is greatly reduced, and therefore, the cutting difficulty of the cutting teeth 24 is also greatly reduced, the loss of the cutting teeth 24 can be reduced, and the service life of the cutting teeth 24 is prolonged.
At the same time, the rolling of the roller 36 can produce periodic axial vibrations. The periodic vibration can be transmitted to the drill string, so that the stability of rotation of the drill string and the transmission efficiency of the weight on bit can be effectively improved, and the drilling efficiency is further improved.
The structure and operation of the roller teeth 362 and the cutting teeth 24 are well known to those skilled in the art, and detailed description thereof will be omitted herein.
As shown in fig. 1, a seal assembly 40 is also provided between the roller 36 and the roller 34. The seal assembly includes a first seal 42 and a second seal 43 joined together and made of a rigid material with rigidity. The hard material may be, for example, martensitic stainless steel, tungsten carbide, ceramic, cemented carbide, diamond, cubic boron nitride, or silicon nitride. These materials are each of a relatively high hardness and are effective to withstand the friction of the formation gravel, thereby reducing the wear to which the first seal 42 and the second seal 43 are subjected.
In the present utility model, the joint surface (not shown) where the first seal member 42 and the second seal member 43 are joined is subjected to a polishing process, and thus can be formed into a polished surface. Thus, when the first seal member 42 and the second seal member 43 meet, they can form an end face seal, thereby closing the fine gap between the roller 34 and the roller 36.
Further, the seal assembly also includes a support 44 disposed at each end of the seal that interfaces with the seal. The support is provided to be made of an elastic material so that the support has a certain elasticity. Meanwhile, the support 44 is arranged to be in a compressed state when the first and second seals meet. Thus, when the first and second seals meet, the support 44 can press the first and second seals 42 and 43 by self elastic force, so that the first and second seals 42 and 43 come into abutment, thereby further improving the sealing performance of the seal assembly.
In a preferred embodiment, the elastic material may be provided as hydrogenated nitrile rubber, nitrile rubber or fluororubber, for example. These materials have not only good elasticity but also good wear resistance, which can further increase the life of the seal 42.
In a preferred embodiment, the plurality of seal assemblies 40 are provided in plurality, and the plurality of seal assemblies are uniformly arranged along the axial direction of the roller 34, so that the vibration damping performance of the seal assemblies 40 can be further improved by the coaction of the plurality of seal assemblies 40.
In a preferred embodiment, reinforcement layers 38 are also applied to the outer walls of the roller 34, roller 36 and palm arm 32, respectively. The strengthening layer 38 is preferably made of tungsten carbide material. On the one hand, the tungsten carbide material has good oxidation resistance and corrosion resistance, and can protect the roller 34, the roller 36 and the palm arm 32, and reduce the risk of oxidation corrosion. On the other hand, the material has good wear resistance, and can reduce the wear resistance of the roller 34 and the roller 36, thereby further prolonging the service life of the roller 34 and the roller 36.
In a not shown embodiment, the outer walls of the roller 34 and the roller 36 are nitrided such that the roller 34 and the roller 36 are internally nitrided. With this arrangement, the surface hardness and wear resistance of the roller 34 and the roller 36 can be further improved, thereby further improving the service lives of the roller 34 and the roller 36.
It should be noted that the roller 34 and the roller 36 may be reinforced by carburizing, boronizing, carbonitriding, or the like by those skilled in the art, and the present utility model is not limited thereto.
In addition, as shown in fig. 1, a central flow passage 16 through which fluid flows is provided in the body 10, and the flow passage 16 has a nozzle 162 extending to the blade 22. Thus, the operator can cause fluid within the drill string to be ejected to the blades 22 and discharged. Thus, after the fluid in the drill string is injected to the blade 22, it can cool the blade 22, preventing the blade 22 from rapidly heating up with the rotational friction with the formation.
At the same time, after the fluid in the drill string exits the body 10, it will flow along the outer walls of the blades 22 to the formation. During this process, the fluid also cleans the blades 22, preventing formation gravel adhered by the blades 22 from increasing the friction between the body 10 and the formation, thereby increasing the difficulty of drilling the body 10.
The operation of the PDC-roller hybrid drill bit 100 according to the present utility model is briefly described below.
The PDC-roller hybrid drill bit 100 of the present utility model is used in drilling operations. During drilling, the roller assembly 30 may first contact the formation to break the formation rock, thereby reducing the hardness of the formation rock. When the breaking strength of the formation rock is reduced, the PDC assembly 20 cuts the broken and weakened formation rock. Thus, through the mutual cooperation of the PDC assembly 20 and the roller assembly 30, the drilling efficiency can be effectively improved, the loss of the PDC assembly 20 and the roller assembly 30 can be reduced, and the service life of the PDC-roller hybrid drill bit 100 can be prolonged.
While the PDC-roller hybrid drill bit 100 is being drilled, the body 10 vibrates due to formation resistance, resulting in relative vibration of the rollers 36 and 34. At this time, the seal member 42 is elastically deformed, thereby reducing the amplitude of the relative vibration of the roller 36 and the roller 34. In this process, the support 44 can act to limit the seal 42, preventing axial movement of the seal 42 relative to the roller 34, thereby reducing wear of the seal 42 and increasing the service life of the seal 42.
Finally, it should be noted that the above description is only of a preferred embodiment of the utility model and is not to be construed as limiting the utility model in any way. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the techniques described in the foregoing examples, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (7)
1. A PDC-roller hybrid drill bit, comprising:
a body (10) connected to the drill string,
a PDC assembly (20) disposed on the body (10), the PDC assembly (20) including blades (22) and a plurality of cutting teeth (24) uniformly disposed on the blades (22), and,
the roller assembly (30) is arranged on the body (10), the roller assembly (30) comprises a palm arm (32) fixedly connected to the body (10), a roller (34) connected to the palm arm (32), and a roller (36) sleeved on the roller (34) and capable of rotating relative to the roller (34), a plurality of roller teeth (362) are uniformly arranged on the outer wall of the roller (36),
wherein the roller teeth (362) are configured to have a height that is higher than the cutting teeth (24) such that the roller (36) is capable of crushing rock by rotation before the PDC assembly (20) cuts formation rock, thereby creating crack defects in the uncrushed rock,
a sealing component (40) is arranged between the roller (36) and the roller (34), the sealing component (40) is sleeved on the roller (34) and is abutted with the roller (36),
the seal assembly (40) includes: a first seal (42) and a second seal (43) joined together, the joining surfaces of the first seal (42) and the second seal (43) being configured as cut-away surfaces; and elastic supporting members (44) provided at both ends of the first and second sealing members (42, 43) and connected to the first and second sealing members (42, 43), the supporting members (44) being provided in a compressed state when the first and second sealing members (42, 43) are connected.
2. The PDC-roller hybrid drill bit of claim 1 wherein the first seal (42) and the second seal (43) are made of martensitic stainless steel, tungsten carbide, ceramic, cemented carbide, diamond, cubic boron nitride, or silicon nitride material and the support (44) is made of a hydrogenated nitrile rubber, or fluororubber material.
3. The PDC-roller hybrid drill bit of claim 2 further characterized by a reinforcement layer (38) on the outer walls of the roller (34), roller (36) and palm arm (32), respectively.
4. A PDC-roller hybrid drill bit of claim 3 wherein the strengthening layer (38) is made of a tungsten carbide material.
5. The PDC-roller hybrid drill bit of claim 3 wherein the outer walls of the roller (34) and the roller (36) are each nitrided such that the roller (34) and the roller (36) are each internally nitrided.
6. The PDC-roller hybrid drill bit of any of claims 1-5 wherein a central flow passage (16) in fluid communication with a drill string is provided within the body (10), the central flow passage (16) having a nozzle (162) extending to the blades (22) such that fluid within the drill string can be injected at the blades (22) and discharged.
7. The PDC-roller hybrid drill bit of any of claims 1-5 wherein the roller teeth (362) are configured with a tooth height that is 0.01-5mm greater than the tooth height of the cutting teeth (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223610458.8U CN219754471U (en) | 2022-12-30 | 2022-12-30 | PDC-roller hybrid drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223610458.8U CN219754471U (en) | 2022-12-30 | 2022-12-30 | PDC-roller hybrid drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219754471U true CN219754471U (en) | 2023-09-26 |
Family
ID=88087428
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223610458.8U Active CN219754471U (en) | 2022-12-30 | 2022-12-30 | PDC-roller hybrid drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219754471U (en) |
-
2022
- 2022-12-30 CN CN202223610458.8U patent/CN219754471U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240201 Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Country or region after: China Patentee after: Sinopec Petroleum Engineering Technology Service Co.,Ltd. Patentee after: SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Patentee after: SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD. DRILLING TECHNOLOGY Research Institute Address before: 257017 No. 827, Beiyi Road, Dongying District, Dongying City, Shandong Province Patentee before: SINOPEC OILFIELD SERVICE Corp. Country or region before: China Patentee before: SINOPEC SHENGLI PETROLEUM ENGINEERING Co.,Ltd. Patentee before: SINOPEC SHENGLI PETROLEUM ENGINEERING CO., LTD. DRILLING TECHNOLOGY Research Institute |
|
| TR01 | Transfer of patent right |