CN214118116U - Device for simulating influence of horizontal well section rock debris bed on friction torque of drill string - Google Patents
Device for simulating influence of horizontal well section rock debris bed on friction torque of drill string Download PDFInfo
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- CN214118116U CN214118116U CN202023242222.4U CN202023242222U CN214118116U CN 214118116 U CN214118116 U CN 214118116U CN 202023242222 U CN202023242222 U CN 202023242222U CN 214118116 U CN214118116 U CN 214118116U
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Abstract
The utility model discloses a device for simulating the influence of horizontal well section detritus bed on drill column friction torque, which comprises a drilling fluid kettle, a simulation drill column, a drill column rotating system, a kettle pushing system and a detection system; the simulation drill column is horizontally arranged in the drilling fluid kettle, and one end of the simulation drill column is pressed against the simulation rock core; a torque connecting shaft of the drill column rotating system penetrates through the drilling fluid kettle to be coaxially connected with the simulation drill column and is used for rotating the simulation drill column, and the torque connecting shaft is connected with the drilling fluid kettle in a sliding and sealing manner, so that the drilling fluid kettle can axially move along the torque connecting shaft; the kettle pushing system is used for pushing the drilling fluid kettle to axially move along the torque connecting shaft; the detection system comprises a torque sensor and a height measuring device. The device can simulate the friction torque of the drill stem under different rotating speeds and different drill stem propulsion speeds, can adjust the thickness of the detritus bed, further can simulate the friction torque influence of the detritus bed on the drill stem, and has important guiding function on the thickness control of the detritus bed in the drilling process and the tripping process of the drill stem.
Description
Technical Field
The utility model relates to an oil drilling simulation experiment technical field, concretely relates to device of simulation horizontal well section detritus bed to drilling string friction torque influence.
Background
The long horizontal section horizontal well technology has the technical advantages of greatly improving the oil gas yield and the recovery ratio, and has remarkable development benefit on oil gas reservoirs. However, in the process of drilling a long horizontal well section, because the horizontal section is long, rock debris can sink to the lower well wall under the action of self gravity, and the flow rate of drilling fluid of the lower well wall is very slow, the rock debris can be accumulated on the lower well wall to form a rock debris bed, once the thickness of the rock debris bed reaches a certain value, the construction efficiency can be affected, safety problems can occur, and complex conditions such as tripping, drilling resistance and blocking can be caused.
At present, a uniform standard does not exist for a solution of a horizontal well section rock debris bed to drill string friction torque, a traditional solution generally uses lubricants such as diesel oil and white oil to reduce friction between a drill string and a well wall (mud cake), the friction between the drill string and the rock debris is rarely involved, and according to field practical experience, the friction between the drill string and the rock debris cannot be effectively solved by using the traditional lubricants. The friction torque of drilling string under the drilling fluid circulation condition is simulated to present experimental apparatus, carry the drill chip through the drilling fluid of circulation and get into in the simulation pit shaft, and the pit shaft is long tube-shape, this mainly is applicable to simulation detritus deposition process, but detritus thickness is dynamic change always in the experimental process, and the detritus is not even along simulation pit shaft axial evenly distributed in the operation, consequently the friction torque of drilling string under certain detritus thickness can't be surveyed, be not suitable for the influence of research detritus thickness to drilling string friction torque, and the device structure is complicated, and the cost is expensive, and the use is inconvenient.
SUMMERY OF THE UTILITY MODEL
For solving the not enough of prior art condition, the utility model provides a device of simulation horizontal well section detritus bed to drilling string friction torque influence, the utility model discloses utilize the simulation drilling string rotatory in the drilling fluid cauldron, the detritus in the drilling fluid cauldron can quantitative interpolation, and thickness is adjustable, this device simple structure, easy and simple to handle. The utility model discloses a concrete scheme as follows:
a device for simulating the influence of a horizontal well section rock debris bed on the friction torque of a drill string comprises a drilling fluid kettle, a simulation drill string, a drill string rotating system, a kettle pushing system and a detection system; the simulation drill column is positioned in the drilling fluid kettle and horizontally arranged, and one end of the simulation drill column is pressed against the simulation rock core; a torque connecting shaft of the drill column rotating system penetrates through the drilling fluid kettle to be coaxially connected with the simulation drill column and is used for rotating the simulation drill column, and the torque connecting shaft is connected with the drilling fluid kettle in a sliding and sealing manner, so that the drilling fluid kettle can axially move along the torque connecting shaft; and the kettle pushing system is used for pushing the drilling fluid kettle to axially move along the torque connecting shaft, so that the pushing speed of the simulation drill column is adjusted.
Preferably, the kettle pushing system comprises a linear slide rail and a speed regulator; the linear slide rail is used for guiding the drilling fluid kettle to move linearly and limiting the moving direction of the drilling fluid kettle, and the speed regulator is used for pushing the drilling fluid kettle to move along the linear slide rail and determining the moving speed of the drilling fluid kettle.
Further, the linear slide rail comprises a linear guide rail and a slide block, the drilling fluid kettle is positioned on the slide block and fixedly connected with the slide block, and the slide block is matched and in sliding connection with the linear guide rail and used for guiding the drilling fluid kettle to move linearly; the speed regulator is a telescopic rod, in particular to an electric ball screw, one end of a screw rod is rotatably connected with the drilling fluid kettle, and a screw rod sliding block is driven by a motor to rotate so as to drive the screw rod to move and push the drilling fluid kettle to move.
The detection system comprises a torque sensor and a height measuring device; the height measuring device is used for measuring the thickness of rock debris in the drilling fluid kettle; the torque sensor is used for measuring the torque when the drill string rotates and reflecting the friction condition suffered by the simulated drill string.
The drill string rotating system comprises a power mechanism, a torque connecting shaft and a power mechanism connecting shaft are arranged at two ends of the torque sensor respectively, and the power mechanism connecting shaft is coaxially connected with a rotor of the power mechanism.
The torque connecting shaft and the drilling fluid kettle are connected in a sliding and sealing mode specifically as follows: the torque connecting shaft is connected with the wall surface of the drilling fluid kettle in a rotating and sealing way through a mechanical sealing bearing, and the mechanical sealing bearing is used when a rotating shaft of a conventional pump is connected with a pump body. Specifically, mechanical seal bearing includes quiet ring and rotating ring, and its quiet ring and drilling fluid cauldron fixed connection, the moment of torsion connecting axle pass the rotating ring and rather than clearance fit and this clearance department is provided with the sealing washer for the drilling fluid cauldron can be followed moment of torsion connecting axle axial displacement and not leak liquid.
And a feed inlet is formed in the drilling fluid kettle and used for feeding rock debris into the kettle and adjusting the thickness of a rock debris bed.
Preferably, the power mechanism is a variable frequency motor, and the rotating speed of the connecting shaft can be adjusted in a stepless manner.
Preferably, the outer wall of the drilling fluid kettle is provided with a height measuring device, so that the thickness of the added rock debris can be measured.
Preferably, the torque sensor is a dynamic torque sensor, so that the accuracy of the measured torque value is ensured.
Compared with the prior art, the method has the following advantages:
the utility model discloses a device of simulation horizontal well section detritus bed to influence of drilling string friction torque can simulate the drilling string friction torque under the propulsion speed of different rotational speeds, different drilling strings, can adjust the thickness of detritus bed, and then can simulate the friction torque influence of detritus bed to the drilling string, creeps into the process and play down drilling in-process detritus bed thickness control to the drilling string and have important guide effect.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of a kettle push system;
FIG. 3 is a schematic view of a mechanical seal bearing configuration;
in the figure: 1. a drilling fluid kettle; 2. simulating a drill string; 3. simulating a rock core; 4. a linear slide rail; 5. a speed regulator; 6. A torque sensor; 7. a height measuring device; 8. an electric motor; 9. a torque connecting shaft; 10. the power mechanism is connected with the shaft; 11. A bearing seat; 12. a mechanical seal bearing;
41. a linear guide rail; 42. a slider; 121. a stationary ring; 122. a movable ring.
Detailed Description
The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the present invention.
Example (b):
referring to fig. 1, fig. 1 is a schematic view of the overall structure of the present invention. A device for simulating the influence of horizontal well section rock debris beds on the friction torque of a drill string comprises a drilling fluid kettle 1, a simulation drill string 2, a drill string rotating system, a kettle pushing system and a detection system; the simulation drill string 2 is positioned in the drilling fluid kettle 1 and horizontally arranged, and one end of the simulation drill string is pressed against the simulation rock core 3; a torque connecting shaft 9 of the drill string rotating system penetrates through the drilling fluid kettle 1 to be coaxially connected with the simulation drill string 2 and is used for rotating the simulation drill string, and the torque connecting shaft 9 is connected with the drilling fluid kettle 1 in a sliding and sealing mode, so that the drilling fluid kettle 1 can axially move along the torque connecting shaft 9; the kettle pushing system is used for pushing the drilling fluid kettle 1 to axially move along the torque connecting shaft, so that the pushing speed of the simulation drill string is adjusted.
Referring to fig. 1 and 2, fig. 2 is a schematic view of a tank pushing system. The kettle pushing system comprises a linear slide rail 4 and a speed regulator 5; the linear slide rail 4 is used for guiding the drilling fluid kettle to move linearly and limiting the moving direction of the drilling fluid kettle, and the speed regulator 5 is used for pushing the drilling fluid kettle 1 to move along the linear slide rail 4 and controlling the propelling speed of the simulation drill string; specifically, the linear slide rail 4 comprises a linear guide rail 41 and a slide block 42, the drilling fluid kettle 1 is positioned on the slide block 42 and fixedly connected with the slide block 42, and the slide block 42 is matched and slidably connected with the linear guide rail 41 and used for guiding the drilling fluid kettle 1 to move linearly; the speed regulator 5 is a telescopic rod, in particular an electric ball screw, one end of the screw rod is rotatably connected with the drilling fluid kettle 1, and the screw rod sliding block is driven by a special motor to rotate and drive the screw rod to stretch.
With continued reference to fig. 1, the detection system includes a torque sensor 6 and a height determining device 7; the height measuring device 7 is positioned on the side wall of the drilling fluid kettle 3 and is used for measuring the thickness of rock debris in the drilling fluid kettle 1; the torque sensor 6 is used for measuring the torque when the drill string rotates, and reflects the friction condition of the simulated drill string.
The drill string rotating system comprises a motor 8, a torque connecting shaft 9 and a power mechanism connecting shaft 10 are respectively arranged at two ends of the torque sensor 6, and meanwhile, bearing seats 11 are respectively arranged on the torque connecting shaft 9 and the power mechanism connecting shaft 10 and used for supporting the corresponding connecting shafts. The power mechanism connecting shaft 10 is coaxially connected with the rotor of the motor 8.
Referring to fig. 1-3, fig. 3 is a schematic view of a mechanical seal bearing structure. The torque connecting shaft 9 and the drilling fluid kettle 3 are connected in a sliding and sealing mode specifically as follows: the torque connecting shaft 9 penetrates through the wall surface of the drilling fluid kettle 1 and is in rotary sealing connection with the drilling fluid kettle through a mechanical sealing bearing 12, and the mechanical sealing bearing 12 is a mechanical sealing bearing used when a rotating shaft of a conventional pump is connected with a pump body. Specifically, the mechanical seal bearing 12 includes a stationary ring 121 and a moving ring 122, the stationary ring 121 is fixedly connected to the drilling fluid tank 1, the torque connecting shaft 9 passes through the moving ring 122 and is in clearance fit with the moving ring 122, and a sealing ring (not shown in the figure) is disposed at the clearance, so that the drilling fluid tank 1 can move axially along the torque connecting shaft 9 without leakage of fluid.
An opening at the upper part of the drilling fluid kettle 1 is a feed inlet for putting rock debris into the kettle and adjusting the thickness of a rock debris bed.
Further, the motor 8 is a variable frequency motor, and the rotating speed can be adjusted in a stepless manner.
Further, the torque sensor 6 is a dynamic torque sensor, specifically a JN-DN type rotary (dynamic) torque sensor, and has high detection precision, good stability and strong anti-interference capability.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the embodiments of the present invention are all covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A device for simulating the influence of a horizontal well section detritus bed on the friction torque of a drill column is characterized by comprising a drilling fluid kettle, a simulation drill column, a drill column rotating system, a kettle pushing system and a detection system; the simulation drill column is horizontally arranged in the drilling fluid kettle, and one end of the simulation drill column is pressed against the simulation rock core; a torque connecting shaft of the drill stem rotating system penetrates through the drilling fluid kettle and is in sliding sealing connection with the drilling fluid kettle, so that the drilling fluid kettle can axially move along the torque connecting shaft; one end of the torque connecting shaft, which is positioned in the drilling fluid kettle, is coaxially connected with the simulation drill stem and is used for rotating the simulation drill stem; the kettle pushing system is used for pushing the drilling fluid kettle to axially move along the torque connecting shaft; the detection system comprises a torque sensor and a height measuring device, wherein the height measuring device is used for measuring the thickness of rock debris in the drilling fluid kettle; the torque sensor is used to measure the torque as the drill string rotates.
2. The apparatus of claim 1, wherein the vessel propulsion system comprises a linear slide and a speed governor; the linear slide rail is used for guiding the drilling fluid kettle to move linearly and limiting the moving direction of the drilling fluid kettle, and the speed regulator is used for pushing the drilling fluid kettle to move along the linear slide rail.
3. The device for simulating the influence of the horizontal well section detritus bed on the friction torque of the drill string as claimed in claim 2, wherein the linear slide rail comprises a linear guide rail and a slide block, the drilling fluid kettle is positioned on the slide block and fixedly connected with the slide block, and the slide block is engaged with and slidably connected with the linear guide rail and used for guiding the drilling fluid kettle to move linearly; the speed regulator is an electric ball screw, one end of the screw is rotationally connected with the drilling fluid kettle, and the screw slider is driven by the motor to rotate so as to drive the screw to move.
4. The device for simulating the influence of the horizontal well section rock debris bed on the friction torque of the drill string as claimed in claim 1, wherein the drill string rotating system comprises a power mechanism, a torque connecting shaft and a power mechanism connecting shaft are respectively arranged at two ends of the torque sensor, and the power mechanism connecting shaft is coaxially connected with a rotor of the power mechanism.
5. The device for simulating the influence of the horizontal well section detritus bed on the friction torque of the drill string as claimed in claim 4, wherein the power mechanism is a variable frequency motor.
6. The device for simulating the effect of a horizontal well section detritus bed on drill string friction torque as claimed in claim 1, wherein the torque connection shaft and the drilling fluid kettle are in sliding seal via mechanical seal bearings; the mechanical seal bearing comprises a static ring and a dynamic ring, the static ring is fixedly connected with the drilling fluid kettle, the torque connecting shaft penetrates through the dynamic ring and is in clearance fit with the dynamic ring, and a sealing ring is arranged at the clearance, so that the drilling fluid kettle can axially move along the torque connecting shaft and is free from leakage.
7. The apparatus of claim 1, wherein the torque sensor is a dynamic torque sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023242222.4U CN214118116U (en) | 2020-12-29 | 2020-12-29 | Device for simulating influence of horizontal well section rock debris bed on friction torque of drill string |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023242222.4U CN214118116U (en) | 2020-12-29 | 2020-12-29 | Device for simulating influence of horizontal well section rock debris bed on friction torque of drill string |
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| CN214118116U true CN214118116U (en) | 2021-09-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199605A (en) * | 2022-02-18 | 2022-03-18 | 西南石油大学 | Horizontal drill string system dynamics simulation test bed and test method |
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2020
- 2020-12-29 CN CN202023242222.4U patent/CN214118116U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114199605A (en) * | 2022-02-18 | 2022-03-18 | 西南石油大学 | Horizontal drill string system dynamics simulation test bed and test method |
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