CN109837077B - Wax inhibitor-supported rubber paraffin removal ball and preparation method, preparation device and application thereof - Google Patents
Wax inhibitor-supported rubber paraffin removal ball and preparation method, preparation device and application thereof Download PDFInfo
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Abstract
The invention provides a rubber paraffin removal ball carrying an anti-paraffin agent, and a preparation method, a preparation device and application thereof, wherein the device consists of a punching device, an injection device and a supporting device, the three devices are matched for use, the punching device can drill holes on the surface of the traditional rubber paraffin removal ball, the injection device injects the anti-paraffin agent into the holes of the rubber paraffin removal ball, the supporting device plays a role in fixedly supporting the punching device and the injection device, and can be matched with the punching device and the injection device to complete a series of operations, and the prepared rubber paraffin removal ball simultaneously has double functions of physical paraffin removal and chemical paraffin removal and can be recycled.
Description
Technical Field
The invention belongs to the field of crude oil transportation, and relates to a rubber paraffin removal ball carrying an anti-paraffin agent, and a preparation method, a preparation device and application thereof.
Background
The oil field is produced with most of the crude oil containing wax, the paraffin usually exists in the oil layer in a dissolved state, and in the process of oil field production, the paraffin in the crude oil can be gradually separated out due to the reduction of temperature and pressure and the escape of light components, wax crystal particles begin to be separated out in the oil flow or on the pipe wall, paraffin accumulation is generated, the sectional area of the pipeline is reduced, the flow resistance of the crude oil is increased, the efficiency of an oil well pump is influenced, and when the wax deposition is serious, the oil well pipeline can be completely blocked, so that the production stop is caused.
The wax-proof technology for oil field gathering and transportation pipeline mainly includes chemical wax-proof, hot-washing wax-removing and rubber ball wax-removing, etc.. The chemical wax control is a wax control process widely applied to oil fields at present, the chemical agent is dissolved or dispersed by chemical substances through a pump cylinder, and the deposited wax is dissolved into small-particle crude oil flowing out of a pipeline, but the wax control process needs to inject the chemical agent at regular time, so that the operation cost is high, and the wax control process has certain pertinence. Thermal cleaning wax, which is typically used in conjunction with other processes, utilizes thermal fluid circulation to raise the temperature in the wellbore above the melting point of the wax to prevent wax precipitation. The method is characterized in that rubber balls enter a pipeline through a ball throwing device, wax on the pipe wall is scraped by utilizing the mechanical strength of the rubber balls, and the scraped broken wax is carried to the ground by oil flow. The method needs to be put into use at regular time and needs to be recycled, and the paraffin removal ball is easy to be blocked due to the existence of a pipeline welding line, a bend and a reducing diameter, and has no paraffin prevention function.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the rubber paraffin removal ball carrying the paraffin inhibitor, and the preparation method, the preparation device and the application thereof.
The invention is realized by the following technical scheme:
a wax-proof agent carried rubber wax-removing ball is made up by injecting wax-proof agent into rubber wax-removing ball.
Preferably, the wax control agent component comprises: sodium stearate, sodium citrate and sodium bicarbonate.
A preparation device of a rubber paraffin removal ball carrying an anti-paraffin agent comprises a perforating device, a supporting device and an injection device;
the punching device comprises a punching shell, a motor, a gear linkage device, a drill bit fixing plate and a plurality of drill bits, wherein the gear linkage device and the drill bit fixing plate are arranged in the punching shell; the gear linkage device comprises a plurality of gears, wherein one gear is arranged on an output shaft of the motor, the other gears are arranged at one end of each drill bit in a one-to-one correspondence manner, and the other end of each drill bit penetrates through the drill bit fixing plate and then extends out of the punching shell; each drill bit is arranged on a drill bit fixing plate through a bearing and a bearing seat; when the motor works, an output shaft of the motor drives the drill bits to rotate simultaneously through gear linkage;
the injection device comprises an injection shell, a plurality of injection needles and an injection pump; the injection needles are arranged on the injection shell, the injection needles and the drill bits are arranged in a one-to-one correspondence mode, and the injection shell is connected with the injection pump through a slurry pipe;
the support device comprises a punching injection support and a rubber paraffin removal ball support, the punching injection support is used for loading and supporting the punching device and the injection shell, and the punching device and the injection shell can move in the punching injection support to respectively perform punching and injection operations; the rubber paraffin removal ball supporting piece is used for loading and supporting the rubber paraffin removal ball;
preferably, the perforating shell and the injection shell are both arranged in a cylinder shape, the axis of the drill bit is parallel to the axis of the perforating shell, the axis of the injection needle is parallel to the axis of the injection shell, and the outer diameter of the injection shell is the same as that of the perforating shell.
Furthermore, the perforating injection supporting piece and the rubber paraffin removal ball supporting piece are both cylindrical; the inner diameter of the rubber paraffin removal ball supporting piece is matched with the diameter of the rubber paraffin removal ball, and the inner diameter of the punching injection supporting piece is matched with the outer diameter of the punching shell.
Further, the rubber paraffin removal ball supporting piece is coaxially arranged in the punching injection supporting piece, and the outer diameter of the rubber paraffin removal ball supporting piece is matched with the inner diameter of the punching injection supporting piece.
Preferably, the plurality of drill bits are arranged in several concentric circular arrays.
Further, the drill bits arranged on the circumference of the outer layer are shorter than the drill bits arranged on the circumference of the inner layer.
A preparation method of a rubber paraffin removal ball carrying an anti-paraffin agent is based on the device and comprises the following steps: dissolving the wax inhibitor in ethanol to prepare wax inhibitor slurry; placing the rubber paraffin removal ball in a rubber paraffin removal ball support member, placing a punching device in a punching injection support member, starting a motor, and punching a hole on the rubber paraffin removal ball; and after the hole is punched, taking out the punching device from the punching injection support piece, placing the injection shell in the punching injection support piece, injecting wax-proofing agent slurry into the hole of the rubber paraffin removal ball through an injection needle on the injection shell by using an injection pump, and drying and molding.
The application of the rubber paraffin removal ball loaded with the paraffin inhibitor in paraffin removal and prevention of oil pipelines is characterized in that the rubber paraffin removal ball is recovered after being thrown and collected, and the paraffin inhibitor is injected again, so that the rubber paraffin removal ball is recycled for many times.
Compared with the prior art, the invention has the following beneficial technical effects:
the wax-proofing agent-loaded rubber paraffin removal ball disclosed by the invention is characterized in that the wax-proofing agent is injected into the rubber paraffin removal ball, so that the rubber paraffin removal ball has double functions of physical paraffin removal and chemical paraffin prevention, and the defect that the rubber paraffin removal ball has no paraffin prevention function is overcome. When the properties of the crude oil are different, the paraffin removal balls suitable for the properties of different crude oils can be prepared by adjusting the components of the paraffin inhibitor, and the application range is wide and is not limited.
The invention relates to a preparation device of a rubber paraffin removal ball carrying an anti-paraffin agent, which consists of a perforating device, an injection device and a supporting device, wherein the perforating device can drill holes on the surface of the traditional rubber paraffin removal ball, the injection device injects the anti-paraffin agent into the holes of the rubber paraffin removal ball, and the supporting device plays a role in fixedly supporting the perforating device and the injection device and can be matched with the perforating device and the injection device to complete a series of operations. The whole device is simple and convenient, can change traditional rubber paraffin removal ball into the new spheroid that has chemical wax control function fast, makes it have the dual function of physics paraffin removal and chemical paraffin removal simultaneously, has compensatied the shortcoming that rubber paraffin removal ball does not have the paraffin control effect.
When the wax removing ball carrying the wax-proofing agent is used, the rubber wax removing ball can be recovered after the ball is thrown and collected once, the hole punching device can remove substances in the hole, the wax-proofing agent can be added into the injection device again for reutilization, and the cost of the wax removing ball is greatly reduced.
Drawings
FIG. 1 is a schematic view of a punching apparatus.
Fig. 2 is a schematic structural view of the injection device.
Fig. 3 is a schematic structural view of the supporting device.
FIG. 4 is a schematic view showing a punching operation state.
Fig. 5 is a schematic view of an injection operation state.
FIG. 6 is a chart of the dissolving performance of paraffin removal balls.
In the figure: the drilling device comprises a drilling device 10, a drilling shell 11, a motor 12, a drill bit fixing plate 13, a drill bit 14, a supporting device 20, a supporting shell 21, a drilling injection supporting piece 22, a rubber paraffin removal ball supporting piece 23, an injection device 30, an injection shell 31, an injection needle 32 and an injection pump 33.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
The invention relates to a rubber paraffin removal ball loaded with paraffin inhibitor, which is prepared by injecting paraffin inhibitor into the rubber paraffin removal ball. The wax inhibitor component can be adjusted according to different properties of crude oil, and in the embodiment of the invention, the wax inhibitor component comprises: 70% sodium stearate, 15% sodium citrate and 15% sodium bicarbonate.
The device for preparing the rubber paraffin removal ball carrying the paraffin inhibitor comprises the following three parts:
as shown in figure 1, the first part is a rubber paraffin ball perforating device 10 which comprises a perforating shell 11, a motor 12, a gear linkage device, a drill bit fixing plate 13 and a plurality of drill bits 14, wherein the gear linkage device and the drill bit fixing plate 13 are arranged in the perforating shell 11. The gear linkage device comprises a plurality of gears, wherein one gear is arranged on an output shaft of the motor 12, the other gears are arranged at one end of each drill bit 14 in a one-to-one correspondence manner, and the other end of each drill bit 14 penetrates through the drill bit fixing plate 13 and then extends out of the punching shell 11; each drill 14 is mounted on the drill fixing plate 13 through a bearing and a bearing seat. The motor 12 provides power for the drill bits 14 through a gear linkage device, and when the motor 12 works, an output shaft of the motor 12 drives the drill bits 14 to rotate simultaneously through gear linkage to perform drilling operation.
The punch housing 11 is preferably provided in a cylindrical shape, and the axis of the drill bit 14 is provided parallel to the axis of the punch housing 11. The plurality of bits 14 are arranged in a plurality of concentric circular arrays, with the bits arranged on the outer circumference being shorter than the bits arranged on the inner circumference to prevent the bits 12 from drilling through the rubber paraffin balls.
As shown in fig. 2, the second part is an injection device 30, and the injection device 30 comprises an injection housing 31, a plurality of injection needles 32 and an injection pump 33. The injection needles 32 are installed on the injection housing 31, the number and arrangement of the injection needles 32 are the same as those of the drill bits 14, and the injection needles 32 correspond to the drill bits 14 one by one. The syringe housing 31 is connected to a syringe pump 33 through a slurry pipe. The injection housing 31 is preferably provided in a hollow cylindrical shape, and the outer diameter of the injection housing 31 is the same as that of the punch housing 11.
As shown in fig. 3, the third part is a support device 20, which comprises a support housing 21, a punch injection support 22 and a rubber wax cleaning ball support 23; the support housing 21 is of a rectangular parallelepiped shape, and a punch injection support 22 and a rubber wax ball support 23 are provided inside the support housing 21. Both the punch injection support member 22 and the rubber wax removing ball support member 23 are cylindrical, the rubber wax removing ball support member 23 is coaxially disposed inside the punch injection support member 22, and the outer diameter of the rubber wax removing ball support member 23 is fitted to the inner diameter of the punch injection support member 22. The inner diameter of the rubber paraffin removal ball supporting piece 23 is matched with the diameter of the rubber paraffin removal ball and is used for loading and supporting the rubber paraffin removal ball; the inner diameter of the perforating injection support member 22 is matched with the outer diameter of the perforating shell 11 for loading the perforating device 10 and the injection shell 31, the perforating device 10 can move in the perforating injection support member 22 along the axial direction, and the extended drill bit 14 can punch a certain hole on the surface of the rubber paraffin ball; the injection housing 31 is also axially movable in the support device 20 to inject the wax-proofing agent into the hole.
The preparation method of the wax-proof agent-loaded rubber paraffin removal ball comprises the following steps: different wax-proofing agent slurries can be prepared according to different properties of crude oil, and the wax-proofing agent slurry can be prepared by dissolving a surfactant mainly comprising sodium stearate in ethanol; the rubber paraffin removal ball is placed in a rubber paraffin removal ball support member 23, the perforating device 10 is placed in a perforating injection support member 22, the motor 12 is started to perforate the rubber paraffin removal ball, after perforation is finished, the perforating device 10 is taken out and replaced by the injection device 30, the injection shell 31 is placed in the perforating injection support member 22, and paraffin inhibitor slurry is input into the hole of the rubber paraffin removal ball through an injection needle 32 by using an injection pump 33.
The invention combines the physical paraffin removal effect of the solid paraffin removal ball with the paraffin control effect of the chemical paraffin removal agent, and gives the rubber paraffin removal ball a certain paraffin control function. After the rubber paraffin removal ball is thrown and collected, the ball body can be recovered, and the paraffin inhibitor is injected again, so that the paraffin inhibitor can be repeatedly added into the ball body, and the rubber paraffin removal ball can be recycled.
Example 1
The method comprises the steps of installing 4 drill bits 14 with the diameter of 2mm, the length of 2cm and the length of 8 drill bits 14 with the length of 1.7cm on a drill bit fixing plate 13 according to a square arrangement mode, enabling the distances among the drill bits 14 to be 3mm, enabling the four drill bits with the length of 2cm to be arranged in the middle to be square, enabling the 8 drill bits with the length of 1.7cm to be arranged in the outer side to be square, driving a gear to enable the drill bits 14 to move by a motor 12, and drilling two groups of drill holes on two adjacent surfaces of a rubber paraffin removal ball. Injection needles 32 having the same size as the drill bits are installed on the injection housing 31 in a one-to-one correspondence to the arrangement of the drill bits 14, and the injection housing 31 is connected with an injection pump 33. 70% sodium stearate, 15% sodium citrate and 15% sodium bicarbonate were dissolved in absolute ethanol and used as an anti-wax agent slurry.
As shown in fig. 4, during operation, the ordinary rubber wax removing ball is placed in the rubber wax removing ball support 23 of the support device 20, the perforating device 10 is inserted into the perforating injection support 22 of the support device 20, the switch of the perforating device 10 is turned on, the motor is operated, and the perforating operation can be completed by slightly pushing downwards. As shown in FIG. 5, the perforating device 10 is removed, the injection needle 32 of the injection device 30 is inserted into the drilled hole, the injection pump 33 is turned on, the wax-proofing agent slurry is injected into the hole, and the hole is dried and molded.
Performance testing
Evaluation of mechanical properties: the mechanical strength of the paraffin removal ball is measured by a 10t testing machine, and the testing pressure is as follows: 1Mpa and 2Mpa (the pressure of an oil pipeline is 0.8Mpa to 1.6Mpa), and whether the surface of the paraffin removal ball is complete or not is observed. As a result, as shown in Table 1, it was found that the mechanical properties of the rubber wax removing pellet loaded with the wax control agent were still good and the pellet could withstand the pressure in the oil pipeline.
TABLE 1 mechanical Property test results of paraffin removal ball
| Example 1 | |
| 1Mpa | Qualified |
| 2MPa | Qualified |
Evaluation of solubility: measuring the dissolution rate by soaking method, weighing paraffin removal ball to m1Putting the paraffin removal ball into a beaker filled with crude oil and water (the volume ratio is 6:4), stirring, recording the mass change condition of the paraffin removal ball every 6 hours, replacing an oil-water mixture once, and calculating the mass fraction of the dissolved paraffin removal ball to obtain the dissolving property of the paraffin removal ball, wherein the experiment period is 3 days, and the results are shown in table 1 and figure 6.
Mass fraction of paraffin removal ball is mi/m1*100％
Wherein: m is1Mass of initial paraffin ball miThe quality of the paraffin removal ball after dissolution.
TABLE 2 wax removal ball dissolution test results
As can be seen from Table 1 and FIG. 6, the paraffin inhibitor in the paraffin wax removal ball prepared in example 1 was substantially completely dissolved in 48 hours.
Evaluation of wax control Rate Performance: the results of the wax-proofing performance evaluation test conducted under the combination of laboratory conditions according to SY/T6300-1997 wax-proofing agent for oil recovery wax-proofing rate determination method are shown in Table 3.
TABLE 3 results of wax control test
| Example 1 | |
| Wax control ratio | 41％ |
Claims (7)
1. The device for preparing the rubber paraffin removal ball carrying the paraffin inhibitor is characterized by comprising a perforating device (10), a supporting device (20) and an injection device (30);
the punching device (10) comprises a punching shell (11), a motor (12), a gear linkage device, a drill bit fixing plate (13) and a plurality of drill bits (14), wherein the gear linkage device and the drill bit fixing plate (13) are arranged in the punching shell (11); the gear linkage device comprises a plurality of gears, wherein one gear is arranged on an output shaft of the motor (12), the other gears are arranged at one end of each drill bit (14) in a one-to-one correspondence manner, and the other end of each drill bit (14) penetrates through the drill bit fixing plate (13) and then extends out of the punching shell (11); each drill bit (14) is arranged on the drill bit fixing plate (13) through a bearing and a bearing seat; when the motor (12) works, an output shaft of the motor (12) drives the drill bits (14) to rotate simultaneously through gear linkage;
the injection device (30) comprises an injection housing (31), a plurality of injection needles (32) and an injection pump (33); the injection needles (32) are arranged on the injection shell (31), the injection needles (32) and the drill bits (14) are arranged in a one-to-one correspondence mode, and the injection shell (31) is connected with the injection pump (33) through a slurry pipe;
the support device (20) comprises a perforation injection support (22) and a rubber paraffin ball support (23), the perforation injection support (22) is used for loading and supporting the perforation device (10) and an injection shell (31), and the perforation device (10) and the injection shell (31) can move in the perforation injection support (22) to respectively perform perforation and injection operations; the rubber paraffin removal ball supporting piece (23) is used for loading and supporting the rubber paraffin removal ball.
2. The apparatus for preparing the paraffin inhibitor-loaded rubber paraffin removal ball according to claim 1, wherein the perforated casing (11) and the injection casing (31) are both provided in a cylindrical shape, the axis of the drill (14) is arranged parallel to the axis of the perforated casing (11), the axis of the injection needle (32) is arranged parallel to the axis of the injection casing (31), and the outer diameter of the injection casing (31) is the same as the outer diameter of the perforated casing (11).
3. The apparatus for preparing the paraffin inhibitor-carrying rubber paraffin removal ball according to claim 2, wherein the perforated injection support member (22) and the rubber paraffin removal ball support member (23) are both cylindrical; the inner diameter of the rubber paraffin removal ball support (23) is matched with the diameter of the rubber paraffin removal ball, and the inner diameter of the perforating injection support (22) is matched with the outer diameter of the perforating shell (11).
4. The apparatus for preparing the paraffin inhibitor-carrying rubber cleaning ball according to claim 3, wherein the rubber cleaning ball support member (23) is coaxially disposed inside the perforation injection support member (22), and the outer diameter of the rubber cleaning ball support member (23) is fitted to the inner diameter of the perforation injection support member (22).
5. The apparatus for preparing the paraffin inhibitor-loaded rubber paraffin removal ball according to claim 1, wherein the plurality of drills (14) are arranged in a plurality of concentric circular arrays.
6. The apparatus for preparing a paraffin inhibitor-loaded rubber paraffin removal ball according to claim 5, wherein the drill bits arranged on the outer circumference are shorter than the drill bits arranged on the inner circumference.
7. A method for preparing a rubber paraffin removal ball carrying an anti-paraffin agent, which is characterized in that based on the device of any one of claims 1 to 6, the method comprises the following steps: dissolving the wax inhibitor in ethanol to prepare wax inhibitor slurry; placing the rubber paraffin removal ball in a rubber paraffin removal ball support member (23), placing the punching device (10) in a punching injection support member (22), starting the motor (12), and punching a hole on the rubber paraffin removal ball; after the hole is punched, the punching device (10) is taken out of the punching injection support member (22), the injection shell (31) is placed in the punching injection support member (22), the wax-proofing agent slurry is injected into the hole of the rubber paraffin removal ball through an injection needle (32) on the injection shell (31) by using an injection pump (33), and the rubber paraffin removal ball is dried and molded.
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| CN201910189550.5A CN109837077B (en) | 2019-03-13 | 2019-03-13 | Wax inhibitor-supported rubber paraffin removal ball and preparation method, preparation device and application thereof |
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| CN110586588A (en) * | 2019-09-29 | 2019-12-20 | 银川塞昊橡胶有限公司 | Wax removal ball |
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