CN213807630U - Vibration rubber plug for well cementation operation - Google Patents
Vibration rubber plug for well cementation operation Download PDFInfo
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- CN213807630U CN213807630U CN202021551951.5U CN202021551951U CN213807630U CN 213807630 U CN213807630 U CN 213807630U CN 202021551951 U CN202021551951 U CN 202021551951U CN 213807630 U CN213807630 U CN 213807630U
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Abstract
The utility model relates to an oil gas well engineering construction field specifically provides a well cementation operation is with vibration plug. The rubber plug is wrapped outside the vibration excitation device. The excitation device is provided with a wireless remote control module. The utility model discloses do not change current well cementation technology, according to corresponding well cementation process flow, design delay vibration time, vibration duration, when the vibration plug is down, can arouse casing string, annular space fluid resonance, improve outside of tubes annular space grout, the flow state of drilling fluid, improve displacement efficiency, sustainable vibration after the vibration plug bumps and presses, promote cement hydration, improve cement early strength, improve cement first, the second interface cementation intensity, improve the well cementation quality, be expected to improve secondary development adjustment well cementation quality.
Description
Technical Field
The utility model relates to an oil gas well engineering construction field specifically provides a well cementation operation is with vibration plug.
Background
The vibration well cementation technology is characterized in that in the processes of cement slurry injection, replacement and waiting setting in well cementation, vibration equipment or tools are adopted to realize the specific vibration of the opposite casing string, so that the flow states of annulus cement slurry and drilling fluid outside a pipe are improved, the replacement efficiency is improved, annulus bubbles are eliminated, the hydration of cement is promoted, the early strength of the cement is improved, the bonding strength of a first interface and a second interface of the cement is improved, and the purpose of improving the well cementation quality is finally achieved.
At present, in the aspect of vibration well cementation equipment and tools, a wellhead hydraulic oscillator, a well bottom rotational flow vibration well cementation short joint and the like are researched and developed domestically and abroad, the acting positions of the well top hydraulic oscillator and the well bottom rotational flow vibration well cementation short joint are respectively arranged above a well top casing head and a well bottom casing shoe, due to the limitation of a vibration principle and a vibration process, the vibration distance and the vibration effect are limited, the vibration of the whole well section cannot be realized, a good vibration effect can only be generated in a local range, and the application has certain limitation.
In order to break through the limitation of the prior art, a dynamic vibration well cementation concept is creatively provided, and air bubbles in well cementation cement slurry can be removed through vibration, so that the cement slurry is fully hydrated and uniform in density, and a hard and complete cement ring can be formed in the air of an oil-water well casing. On one hand, the vibration well cementation effect of the whole well section is realized, and on the other hand, the good manufacturability, the economy and the operability are realized. The concept of dynamic vibration is relative to vibration under the condition of a traditional fixed position, and the dynamic vibration refers to that a vibration source moves from top to bottom in a casing string, and simultaneously enables a casing to generate resonance response and transmit vibration waves in a certain range.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defects of the prior art and providing a vibrating rubber plug for well cementation operation. The cement hydration can be promoted, the early strength of the cement is improved, the bonding strength of the first interface and the second interface of the cement is improved until the preset vibration time is reached, the resonance is completed, and the vibration effect of the whole well section of the well cementation is realized.
The technical scheme is as follows:
a vibrating rubber plug for well cementation operation comprises a rubber plug and a vibration excitation device, wherein the rubber plug is wrapped outside the vibration excitation device.
The excitation device is provided with a wireless remote control module.
The excitation device also comprises a closed cavity, and a driving circuit board, a battery, a motor and an eccentric block which are arranged in the closed cavity; the driving circuit board is electrically connected with the battery; the motor is connected with the driving circuit board; the eccentric block is arranged on a rotating shaft of the motor; the wireless remote control module is in communication connection with the driving circuit board.
The closed cavity is formed by connecting an upper end cover, a framework, a motor base and a lower end cover in a threaded sealing manner in sequence; the upper end cover and the lower end cover are cover bodies provided with external threads; the framework is a pipe body with internal threads at two ends; the motor cabinet is equipped with the external screw thread for one end, and the other end is equipped with internal screw thread body.
The upper end of the framework is provided with a first counter bore, and the driving circuit board is arranged between the upper end cover and a counter bore step of the first counter bore; the lower end of the framework is provided with a second counter bore, the second counter bore is provided with internal threads, and the motor base is in threaded sealing connection with the second counter bore.
The battery is sleeved in the framework.
The motor is arranged in the motor base.
A limiting groove is formed in the motor base; the outer surface of the motor is provided with a bulge; the protrusion is in limit fit with the limit groove and used for fixing the axial position of the motor and preventing the motor from rotating.
The vibrating rubber plug for well cementation is suitable for improving the strength of the solidified cement paste or cleaning the outer wall of a casing:
and when the vibration frequency of the vibrating rubber plug for well cementation is set to be 170-175 HZ, the vibrating rubber plug is used for improving the strength of the solidified cement paste.
And when the vibration frequency of the vibrating rubber plug for well cementation is set to be 20-45 HZ, the vibrating rubber plug is used for removing a drilling fluid film on the outer wall of the casing pipe and a virtual filter cake on the well wall.
The utility model has the advantages that:
(1) the vibrating device is arranged on the well cementation rubber plug body, and the existing well cementation process is not changed.
(2) And designing delay vibration time and vibration duration according to a corresponding well cementation process flow.
(3) When the vibration rubber plug moves downwards, the resonance of the casing string and the annular fluid can be excited, the flow state of annular cement slurry and drilling fluid outside the pipe is improved, and the displacement efficiency is improved.
(4) The vibrating rubber plug can continuously vibrate after being impacted, thereby promoting the hydration of cement, improving the early strength of the cement, improving the bonding strength of the first interface and the second interface of the cement and improving the cementing quality.
(5) The vibrating rubber plug is expected to improve the well cementation quality of secondary development adjusting wells.
Drawings
FIG. 1 is a schematic view of the structure of a vibrating rubber plug;
FIG. 2 is a schematic view of a cross-sectional structure A-A;
FIG. 3 is a schematic view of a cross-sectional structure B-B;
in the figure: 1 upper end cover, 2 drive circuit boards, 3 batteries, 4 skeletons, 5 multistage rubber leather cups, 6 motors, 7 motor bases, 8 eccentric blocks, 9 lower end covers, 10 and 13 sealing rings, 11 retaining rings, 12 rotating shafts, 13 first counter bores, 14 counter bore steps, 15 second counter bores, 16 limiting grooves and 17 bulges.
Detailed Description
In order to make the objects and solutions of the embodiments of the present invention clearer, the embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, it is obvious that the described embodiments are some embodiments of the present invention, not all embodiments, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout, the reference numerals only appear once for the same elements, and the embodiments described below by referring to the drawings are exemplary and intended to explain the present invention, but not to be construed as limiting the present invention.
The first embodiment is as follows:
referring to fig. 1-3, a vibrating rubber plug for well cementing operation comprises a rubber plug and a vibration excitation device; the excitation device comprises a closed cavity, a motor, an eccentric block, a driving circuit board and a battery.
The rubber plug is a multistage rubber cup and is sleeved outside the closed cavity; the closed cavity is formed by sequentially connecting an upper end cover, a framework, a motor base and a lower end cover in a threaded sealing manner; the skeleton is a pipe body of which the outer wall is provided with a plurality of annular steps.
The driving circuit board, the battery, the motor and the eccentric block are all arranged in the closed cavity, wherein the driving circuit board is positioned at the upper part of the framework, the battery is positioned in the framework, the motor is positioned in the motor base, the eccentric block is arranged on a rotating shaft of the motor, and the lower part of the motor base is left empty to be used as an operating space of the eccentric block; the battery is electrically connected with the driving circuit board, and the driving circuit board is electrically connected with the motor.
The battery is inserted into the framework, the diameters of the upper end and the lower end of the battery are slightly larger than those of the rest part of the battery, the battery is in interference fit with the inner wall of the framework, the battery is prevented from moving or shaking in the framework, and the outer wall of the battery is in clearance fit with the inner wall of the framework; the battery is used for providing power supply required by the motor.
The drive circuit board is a motor drive circuit board integrated with a wireless remote control module and a motor drive circuit, the wireless remote control module is one of radio frequency, infrared and Bluetooth remote controls, and a matched remote controller is matched with the wireless remote control module, so that the starting, stopping and rotating speed of the motor can be remotely controlled.
Example two:
a vibration rubber plug for well cementation operation comprises a rubber plug and an excitation device; the excitation device comprises a closed cavity, a motor, an eccentric block, a driving circuit board and a battery; the closed cavity is formed by connecting an upper end cover, a framework, a motor base and a lower end cover in a threaded sealing manner in sequence.
Wherein, the left end of the lower end cover is provided with a regular hexagon counter bore, and the right end is provided with a thread; threads are arranged at two ends of the motor base, and two rectangular grooves are symmetrically arranged in the inner hole along the axial direction; the framework is a hollow tubular structure, and a plurality of annular bulges are arranged on the outer surface of the framework; the left end of the upper end cover is provided with threads, and the right end of the upper end cover is provided with a regular hexagon counter bore; the upper end cover, the framework, the motor base and the lower end cover are sequentially connected together through threads; a sealing ring is arranged at the threaded connection part of the lower end cover and the motor base, and a sealing ring is arranged at the threaded connection part of the motor base and the framework; a multi-stage rubber cup is vulcanized outside the framework and the upper end cover; the driving circuit board is arranged at the right end of the framework and is tightly pressed through the left end face of the upper end cover; the driving circuit comprises a signal receiving module which can receive infrared or Bluetooth signals and control the starting and stopping of the motor and adjust the rotating speed; the battery is arranged in the framework and is compressed through the right end face of the motor base, and the battery provides energy for the rotation of the motor and the driving circuit board; the motor is arranged in the motor base, two rectangular bulges are symmetrically arranged on the outer surface of the motor and inserted into the rectangular groove of the inner hole of the motor base; the eccentric block is formed by intersecting two cylinders with different diameters, and the cylinder with the smaller diameter is provided with a key slot and a through hole along the axis; the eccentric block is inserted on the output shaft of the motor in a key connection mode and is fixed through a nut.
Example three:
referring to fig. 1, a vibration rubber plug for well cementing operation, which is characterized in that a vibration device is clamped on a conventional well cementing rubber plug, the vibration device is arranged in a cement head along with the well cementing rubber plug during well cementing, the vibration time delay and the vibration duration time of the vibration device are set at regular time, a pipe string is vibrated in real time while the well cementing rubber plug passes through a full-well section well completion pipe string, and after the well cementing rubber plug is pressed, the vibration device can also continuously vibrate in a cement paste waiting setting period, so that cement hydration is promoted, the early strength of cement is improved, the first and second interface cementing strengths of cement are improved, and resonance is completed until the preset vibration time is reached, and the vibration effect of the full-well section of well cementing is realized. The vibrating rubber plug for well cementation can be widely applied to horizontal wells and straight inclined wells and is used for improving the well cementation quality.
Example four:
a vibration rubber plug for well cementation operation can be applied to shortening cement slurry solidification time, improving cement slurry solidification strength and cleaning a casing and a well wall, and has the following specific technical parameters:
the excitation amplitude is more than 0.38 g; adjusting the frequency to 0.1-500 Hz; the pressure resistance index is more than 70 MPa; the temperature resistance index is more than or equal to 125 ℃, and when the vibration rate is changed within the range of 20-170 HZ, the initial setting time of the cement paste is shortened by 10-15min, and the final setting time is shortened by 30-40 min.
The test shows that: when the vibration frequency acting on the cement sheath is 170-175 HZ, the strength of the cured cement paste can be improved by 18-2096.
In a vibration field with the frequency of 20-45 HZ, the viscosity of the drilling fluid is reduced by 20-30%. Is favorable for removing a drilling fluid film on the outer wall of the casing and a virtual filter cake on the well wall, and greatly improves the displacement efficiency.
When the simulation device is in the vibration frequency range of 20-150 HZ, the filter cake on the surface of the rock sample can be completely eliminated only by 5-15 s.
The vibrator in the present embodiment has the following features:
the vibration exciter has three design principles: firstly, designing enough excitation load in a narrow space to ensure that a sleeve string can respond to vibration near a vibration source; secondly, a frequency spectrum section of the resonance of the casing string needs to be built, so that the response of the casing string can be amplified: thirdly, it is desirable to control the resonant frequency not to be too high because the high frequency vibrations in the damped condition are damped quickly.
The vibration exciter has the basic function of providing vibration energy, and also plays the role of the cement rubber plug, integrates the vibration exciter and the cement rubber plug, and does not increase the auxiliary labor intensity of construction operation. The vibration displacement of the rubber skirt of the vibration exciting rubber plug is about 0.25mm, so that the tolerance zone of the maximum outer diameter of the rubber skirt moves upwards by +0.25m, and the sealing effect of the rubber plug can be met. The specific structure is designed as shown in the figure, and a vibration exciter (a motor, a power supply, an eccentric wheel and a control circuit) is arranged in the specific structure.
The utility model discloses a theory of operation is:
a vibrating rubber plug for well cementation operation is a new technology of vibrating well cementation. The vibration device is clamped on the conventional well cementation rubber plug, the vibration delay vibration time and the vibration duration time of the vibration device are set regularly, the vibration device is arranged in the cement head along with the well cementation rubber plug during well cementation, the vibrating vibration exciter vibrates the pipe string in real time along with the top-to-bottom movement of the well cementation rubber plug, so that the casing string generates resonance response, and vibration waves act on a well entering fluid, so that the aim of improving the cement slurry displacement efficiency is fulfilled. Meanwhile, after the well cementation rubber plug is pressed, the vibration device can continue to vibrate in the waiting setting period of cement paste, so that cement hydration is promoted, the initial setting time and the final setting time of the cement paste are shortened, the early strength of the cement is improved, the bonding strength of the first interface and the second interface of the cement is improved until the preset vibration time is reached, resonance is finished, and the vibration effect of the whole well cementation section is realized.
The dynamic vibration well cementation realizes the vibration well cementation effect of the whole well section on one hand and realizes better manufacturability, economy and operability on the other hand. The vibrating rubber plug for well cementation can be widely applied to horizontal wells and straight inclined wells and is used for improving the well cementation quality.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. A vibrating rubber plug for well cementation is characterized by comprising a rubber plug and a vibration excitation device, wherein the rubber plug is wrapped outside the vibration excitation device.
2. The vibrating rubber plug for well cementation according to claim 1, wherein the vibration excitation device is provided with a wireless remote control module.
3. The vibration rubber plug for well cementation operation as claimed in claim 2, wherein the vibration excitation device further comprises a closed cavity and a driving circuit board, a battery, a motor and an eccentric block arranged in the closed cavity; the driving circuit board is electrically connected with the battery; the motor is connected with the driving circuit board; the eccentric block is arranged on a rotating shaft of the motor; the wireless remote control module is in communication connection with the driving circuit board.
4. The vibrating rubber plug for well cementation according to claim 3, wherein the closed cavity is formed by connecting an upper end cover, a framework, a motor base and a lower end cover in a sealing manner by screw threads in sequence; the upper end cover and the lower end cover are cover bodies provided with external threads; the framework is a pipe body with internal threads at two ends; the motor cabinet is equipped with the external screw thread for one end, and the other end is equipped with internal screw thread body.
5. The vibrating rubber plug for well cementation according to claim 4, wherein the upper end of the framework is provided with a first counterbore, and the driving circuit board is arranged between the upper end cover and a counterbore step of the first counterbore; the lower end of the framework is provided with a second counter bore, the second counter bore is provided with internal threads, and the motor base is in threaded sealing connection with the second counter bore.
6. A vibrating rubber plug for well cementation according to claim 4 or 5 wherein the battery is sleeved in the framework.
7. A vibrating rubber plug for well cementation according to claim 4 or 5, wherein the motor is arranged in the motor base.
8. A vibration rubber plug for well cementation operation according to claim 7, characterized in that a limit groove is arranged in the motor base; the outer surface of the motor is provided with a bulge; the protrusion is in limit fit with the limit groove and used for fixing the axial position of the motor and preventing the motor from rotating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021551951.5U CN213807630U (en) | 2020-07-30 | 2020-07-30 | Vibration rubber plug for well cementation operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021551951.5U CN213807630U (en) | 2020-07-30 | 2020-07-30 | Vibration rubber plug for well cementation operation |
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| Publication Number | Publication Date |
|---|---|
| CN213807630U true CN213807630U (en) | 2021-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021551951.5U Active CN213807630U (en) | 2020-07-30 | 2020-07-30 | Vibration rubber plug for well cementation operation |
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| CN (1) | CN213807630U (en) |
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- 2020-07-30 CN CN202021551951.5U patent/CN213807630U/en active Active
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