CN117027721A - Oil gas underground sleeve well cementation integrated tool - Google Patents
Oil gas underground sleeve well cementation integrated tool Download PDFInfo
- Publication number
- CN117027721A CN117027721A CN202310993133.2A CN202310993133A CN117027721A CN 117027721 A CN117027721 A CN 117027721A CN 202310993133 A CN202310993133 A CN 202310993133A CN 117027721 A CN117027721 A CN 117027721A
- Authority
- CN
- China
- Prior art keywords
- rotor
- well
- oil
- motor
- sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 31
- 238000005553 drilling Methods 0.000 claims abstract description 22
- 239000012530 fluid Substances 0.000 claims abstract description 17
- 238000005452 bending Methods 0.000 claims description 10
- 229910010293 ceramic material Inorganic materials 0.000 claims description 2
- 238000011010 flushing procedure Methods 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000010354 integration Effects 0.000 claims 1
- 238000005406 washing Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 210000001015 abdomen Anatomy 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/14—Methods or devices for cementing, for plugging holes, crevices, or the like for cementing casings into boreholes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
Abstract
The invention discloses an oil-gas well casing cementing integrated tool. The device comprises a motor part, a guiding part connected to the lower end of the motor part, and a transmission part connected to the lower end of the guiding part; the motor part is internally provided with a stator and a rotor matched with the stator, drilling fluid can provide power under the cooperation of the stator and the rotor when flowing through the motor part, and then the power is transmitted to the lower part through the guide part and the transmission part, the rotor is provided with an axial through hole, the top end of the rotor is provided with a rupture disc positioned above the axial through hole, and after the disc is ruptured by the internal and external pressure difference, the rotor does not rotate any more when the drilling fluid flows through the axial through hole of the rotor, so that the circulating well washing and well cementation operation can be carried out. The advantages are that: the well-dredging device is reasonable in structural design, and is self-powered, so that one-trip well-dredging operation after well drilling can be effectively saved, well completion time is shortened, well completion safety coefficient is improved, and overall well drilling and completion cost is reduced.
Description
Technical Field
The invention relates to a downhole tool of a petroleum exploration well in the field of geological exploration drilling tools, in particular to a well cementation integrated tool of a casing of an oil and gas well.
Background
After the oil and gas well is drilled, a sleeve is needed to be put into, and an oil and gas channel between an oil and gas layer and the ground is established. Because the well track is complex, the well diameter is irregular, the problems of underground leakage, overflow, collapse and the like are solved, the technical problems of large friction resistance, more dropping blocks, large sleeve clamping and difficult sleeve falling are faced in the sleeve falling process, the well completion period is prolonged, meanwhile, because well control measures of well completion are fewer, oil gas is easy to flow up to a wellhead for an oil gas active reservoir, and great safety risks exist in the sleeve falling and well cementation processes. In the prior art, a common floating shoe is replaced by a rotary guide shoe in a casing string structure, and the casing is guided to pass through a complex well section through the rotation of the rotary guide shoe, however, the rotary guide shoe is not provided with power, when the casing is put down and blocked, only the front end of the guide shoe passively rotates, so that the problems that the effect of blocking the casing in the complex well section is limited, the well is required before the casing is put down, the well completion operation time is prolonged, and the well cementation problem of the casing in the complex well section cannot be effectively solved; especially, the oil and gas well with a complex structure has large drilling depth, long horizontal section and large offset distance, and the difficulty faced by casing running becomes more and more prominent; after the oil-gas well with a complex structure is drilled, the problems of large belly well sections, underground block falling and the like are easy to occur due to unstable stratum, so that a casing cannot be smoothly lowered in place when the casing is blocked, underground complexity is caused, the well completion period is prolonged, and even the well is abandoned; therefore, how to solve the complex problems in the casing running and well cementation process, shorten the well completion time, ensure the smooth well completion construction and realize the cost reduction becomes a technical problem to be solved urgently.
Disclosure of Invention
The invention aims to solve the technical problem of providing the oil and gas well casing and well cementation integrated tool which can shorten the completion time of an oil and gas well with a complex structure, reduce the difficulty of well cementation of an oil and gas well casing and improve the safety coefficient of well completion.
In order to solve the technical problems, the oil and gas well casing and well cementation integrated tool comprises a motor part, a guide part connected to the lower end of the motor part and a transmission part connected to the lower end of the guide part; the motor part is internally provided with a stator and a rotor matched with the stator, drilling fluid can provide power under the cooperation of the stator and the rotor when flowing through the motor part, and then the power is transmitted to the lower part through the guide part and the transmission part, the rotor is provided with an axial through hole, the top end of the rotor is provided with a rupture disc positioned above the axial through hole, and after the disc is ruptured by the internal and external pressure difference, the rotor does not rotate any more when the drilling fluid flows through the axial through hole of the rotor, so that the circulating well washing and well cementation operation can be carried out.
The motor part also comprises a motor sleeve, the stator is fixedly arranged in the motor sleeve, and the rotor is arranged at the center of the stator and can be driven to rotate by drilling fluid.
The guide portion includes a guide sleeve and a cardan shaft disposed within the guide sleeve; one end of the universal shaft is connected with the rotor of the motor part, and the other end of the universal shaft is connected with the transmission part and can transmit power to the transmission part.
The transmission part comprises a transmission sleeve and a rotating part arranged in the transmission sleeve, and the rotating part is connected with the universal shaft and can rotate under the drive of the universal shaft, so that the power generated by the motor part is transmitted to the drill bit/the floating shoe.
The rotating component comprises a rotating assembly, a central flow passage and a side passage, wherein the rotating assembly is installed in the transmission sleeve through a bearing, the central flow passage is arranged at the axial center of the rotating assembly, and the side passage is used for penetrating between the central flow passage and the inner cavity of the guide sleeve.
The guide portion has a bending angle.
The bending angle of the guide portion is 0.5-2.5 degrees.
The rupture disc is made of ceramic materials.
The invention has the advantages that:
through the motor part, the guide part connected to the lower end of the motor part and the transmission part connected to the lower end of the guide part, the rotor of the motor part can be driven to rotate through the pressure difference to provide power, and the guide part transmits the power to the transmission part to drive the lower drill bit/floating shoe to rotate, so that the transfer of a front complex well section in the casing running process is realized, the guiding effect in the casing running process is realized, the passing-in of the complex well section casing is realized, meanwhile, the rupture disc above the axial through hole is arranged at the top end of the rotor, the rupture disc is ruptured through the internal and external pressure difference, drilling fluid circulates through the rotor through hole, the tool does not provide power any more, and the tool is rotated into the well fixing operation.
Drawings
FIG. 1 is a schematic cross-sectional view of an oil and gas well casing and well cementation integrated tool according to the present invention.
Description of the embodiments
The oil and gas well casing and well cementation integrated tool of the invention is further described in detail below with reference to the accompanying drawings and detailed description.
As shown in the figure, the oil-gas well casing and well cementation integrated tool comprises a motor part, a guide part connected to the lower end of the motor part and a transmission part connected to the lower end of the guide part, wherein the motor part mainly comprises a motor casing 5, a stator 1 fixedly arranged in the motor casing 5 and a rotor 2 which is arranged in the center of the stator and can be driven to rotate by drilling fluid, the number of motor heads is 7:8, the number of motor stages is 2, and the motor pressure drop is 1.8-2.7MPa; the guiding part mainly comprises a guiding sleeve 6 and a universal shaft 7 arranged in the guiding sleeve, the transmission part mainly comprises a transmission sleeve 8 and a rotating part arranged in the transmission sleeve, one end of the universal shaft 7 is connected with a rotor 2 of the motor part, the other end of the universal shaft is connected with the rotating part of the transmission part, so that the universal shaft can rotate under the drive of the universal shaft, drilling fluid can provide power under the cooperation of a stator and the rotor when flowing through the motor part, and the power is transmitted to the lower part through the guiding part and the transmission part, so that the power generated by the motor part is transmitted to a drill bit/a floating shoe; the rotor 2 is provided with an axial through hole 3, the top end of the rotor 2 is provided with a rupture disc 4 positioned above the axial through hole 3, the rupture disc 4 is made of ceramic, in the embodiment, the forward rupture pressure difference of the rupture disc is 7MPa, and the reverse rupture pressure difference of the rupture disc is 70MPa, namely, in the normal casing running process, the power output of a motor part is realized by starting a pump, circulating with small displacement and rotating the rotor; the rotor has axial through-hole, and the internal diameter of axial through-hole is 50mm, and the top of rotor has the rupture disc, when the pressure differential between inside and outside the rotor exceeded 7MPa, makes the disk break through inside and outside pressure differential after breaking, and the rotor no longer rotates when drilling fluid flows through from the axial through-hole of rotor, namely: the motor part does not provide power any more, so that the large-displacement circulating well washing and the dynamic bearing of the stratum are realized, and the subsequent well cementation operation is implemented.
Further, the rotating member comprises a rotating assembly 9 mounted in the drive sleeve by means of bearings, a central flow channel 10 arranged in the axial centre of the rotating assembly and a side channel 11 for passing between the central flow channel and the inner cavity of the guide sleeve.
Further, the guide portion may have a bending angle of 0.5 to 2.5 °, namely: an included angle exists between the motor sleeve 5 and the transmission sleeve 8, and no bending angle exists, namely: the guide sleeve is a straight pipe; that is to say, the bending degree can be self-defined (0.5-2.5 degrees), and the self-defined bending degree of the guiding part can realize the revolution of the casing around the axial direction of the well bore in the casing running process; through the structural design, the oil-gas well casing well cementation integrated tool is connected to the lowest part of a casing string structure, in the casing running process, a well section with irregular well diameter and a complicated well section with block falling are encountered, a pump is started to circulate, drilling fluid flows through a motor part to drive a rotor to rotate, the rotor rotates to provide power, the power is transmitted to a transmission part through a bending guide part, the transmission part transmits the power to a drill bit/a floating shoe, the transmission part drives the lower drill bit/the floating shoe to rotate, and the rotation and revolution of the drill bit/the floating shoe can be realized due to the fact that the guide part has a certain bending degree, and the rotation of the front end in the casing running process is realized by smoothly passing through the complicated well section by means of the allocation of the front part of the casing string structure. After the casing is run into the designed well depth, the motor section no longer provides power.
The working principle is as follows:
when the oil-gas well casing well cementation integrated tool is used, the oil-gas well casing well cementation integrated tool is connected to the lower part of a casing string, and is used in the process of casing running in a well with the diameter of 215.9mm, the working flow is 1200-2400LPM, the working torque is 3635-5134N.m, the power is 78KW, and the reference weight of drilling is 8KN; in the casing running process, a pump is started to circulate drilling fluid, after the drilling fluid flows through the oil-gas well casing cementing integrated tool, the pressure difference drives the rotor of the motor part to rotate to provide power, the power is transmitted to the transmission part through the guide part, the power is transmitted to the lower part of the oil-gas well casing cementing integrated tool, the lower drill bit/floating shoe is driven to rotate, the transfer of a front complex well section in the casing running process is realized, the guide effect in the casing running process is realized, and the passing and running of the complex well section casing are realized. After the casing is put into the designed well depth, the discharge capacity is increased, the positive and negative pressure difference of the rupture disc at the top of the rotor is increased, when the pressure difference exceeds 7MPa, the rupture disc is ruptured, drilling fluid circulates through the axial through hole of the rotor, the oil-gas well casing and well cementation integrated tool does not provide power any more and is transferred into the well cementation operation, at the moment, the oil-gas well casing and well cementation integrated tool can realize large discharge capacity circulation well flushing before well cementation, ensure well cementation quality, effectively save well completion time and improve well completion operation efficiency and safety; the problems of high difficulty and long period of the oil and gas underground casing are solved, and the technical problems of casing blockage, well wall instability, leakage and other underground risks caused by difficult casing running and long well completion period in well completion operation are solved.
Claims (8)
1. An oil gas well casing well cementation integration instrument in pit, its characterized in that: comprises a motor part, a guiding part connected with the lower end of the motor part and a transmission part connected with the lower end of the guiding part; the drilling fluid flow through the motor part can provide power under the cooperation of the stator and the rotor when the drilling fluid flows through the motor part, and then the power is transmitted to the lower part through the guiding part and the transmission part, the rotor (2) is provided with an axial through hole (3), the top end of the rotor (2) is provided with a rupture disc (4) positioned above the axial through hole (3), after the disc is ruptured by the internal and external pressure difference, the rotor does not rotate when the drilling fluid flows through the axial through hole of the rotor, and then the circulating well flushing and well cementation operation are carried out.
2. The oil and gas well casing cementing integrated tool according to claim 1, wherein: the motor part also comprises a motor sleeve (5), the stator (1) is fixedly arranged in the motor sleeve (5), and the rotor (2) is arranged in the center of the stator and can be driven to rotate by drilling fluid.
3. The oil and gas downhole casing cementing integrated tool according to claim 2, wherein: the guiding part comprises a guiding sleeve (6) and a universal shaft (7) arranged in the guiding sleeve; one end of the universal shaft (7) is connected with the rotor (2) of the motor part, and the other end is connected with the transmission part and can transmit power to the transmission part.
4. An oil and gas well casing cementing integrated tool according to claim 3, wherein: the transmission part comprises a transmission sleeve (8) and a rotating part arranged in the transmission sleeve, wherein the rotating part is connected with the universal shaft (7) and can rotate under the drive of the universal shaft, so that the power generated by the motor part is transmitted to the drill bit/the floating shoe.
5. The oil and gas well casing cementing integrated tool according to claim 4, wherein: the rotating part comprises a rotating assembly (9) which is arranged in the transmission sleeve through a bearing, a central flow passage (10) which is arranged at the axial center of the rotating assembly, and a side passage (11) which is used for penetrating between the central flow passage and the inner cavity of the guide sleeve.
6. An oil and gas well casing cementing integrated tool according to claim 1, 2, 4 or 5, wherein: the guide portion has a bending angle.
7. The oil and gas well casing cementing integrated tool according to claim 6, wherein: the bending angle of the guide portion is 0.5-2.5 degrees.
8. An oil and gas well casing cementing integrated tool according to claim 2, 3, 4 or 5, wherein: the rupture disc (4) is made of ceramic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310993133.2A CN117027721A (en) | 2023-08-08 | 2023-08-08 | Oil gas underground sleeve well cementation integrated tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310993133.2A CN117027721A (en) | 2023-08-08 | 2023-08-08 | Oil gas underground sleeve well cementation integrated tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117027721A true CN117027721A (en) | 2023-11-10 |
Family
ID=88640689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310993133.2A Pending CN117027721A (en) | 2023-08-08 | 2023-08-08 | Oil gas underground sleeve well cementation integrated tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117027721A (en) |
-
2023
- 2023-08-08 CN CN202310993133.2A patent/CN117027721A/en active Pending
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