A quick and quantitative oil injection method and device for a downhole hydraulic module

Abstract

The application discloses a kind of quick quantitative oil injection method and device of downhole hydraulic module, it is related to well drilling equipment technical field, specifically, including: limit component is set in oil storage cavity, for making bellows oil bladder force contraction to stop contraction after setting contraction amount, to make the volume of oil storage area in the oil storage cavity constant;The force is applied to the bellows oil bladder, for making the bellows oil bladder force contraction and continuously keep the setting contraction amount;Negative pressure is conducted to vacuum hole, for making the oil storage area be negative pressure;The quick quantitative oil injection method and device of downhole hydraulic module, by locking bellows oil bladder in advance, and then fix the volume of oil storage area, so that its volume is equal to the volume of oil injection amount, and then when adding oil, without considering the inaccuracy of oil injection amount and overflow problem caused by elastic action of bellows oil bladder, effectively improve oil injection efficiency, success rate and injection accuracy.

Description

Technical Field

[0001] This invention relates to the field of drilling equipment technology, and more specifically, to a method for rapid quantitative oil injection into a downhole hydraulic module. Furthermore, this invention also relates to a rapid quantitative oil injection device incorporating the aforementioned method for rapid quantitative oil injection into a downhole hydraulic module. Background Technology

[0002] Hydraulic thrust modules are commonly used in downhole tools with dynamic changes in their mechanisms, such as the guiding mechanism of rotary steerable tools. Due to the high temperature and high pressure environment downhole, there are more stringent requirements for the volume of gas and oil in the reservoir compared to surface tools. However, current solutions suffer from problems such as insufficient oil injection accuracy, complex processes, low efficiency, and high failure rates.

[0003] like Figure 1 As shown, the oil storage chamber 1 is provided with an oil injection hole 11 and a high-level vacuum hole 12. The oil storage chamber 1 is also provided with a bellows oil bladder 3, which divides the oil storage chamber 1 into an oil storage area and a non-oil storage area. The oil injection hole 11 and the vacuum hole 12 are both connected to the oil storage area, while the non-oil storage area is directly connected to the outside. The oil storage area is connected to the piston chamber 2, and a piston is provided with a sliding seal in the piston chamber 2. When the bellows oil bladder 3 is compressed by force, the volume of the non-oil storage area decreases and the volume of the oil storage area increases. Conversely, when the bellows oil bladder 3 expands, the volume of the non-oil storage area increases and the volume of the oil storage area decreases.

[0004] When the rotary steering tool is used downhole, the non-oil storage area is in direct contact with the external mud. The mud pressure is balanced with the oil pressure in the oil storage area, thereby reducing the pressure requirement of the outer wall of the oil storage chamber 1.

[0005] In the prior art, when the rotary steering tool is lifted to the well for oil injection, the oil injection method is as follows: the oil storage area is evacuated through the vacuum hole, then the vacuum hole is closed, and oil is injected into the oil storage area through the oil injection hole. The oil injection volume is controlled by the meter. During the oil injection process, the piston is in a fixed state and does not move. However, during the negative pressure stage, the bellows oil bladder 3 is stretched by force, and during the oil injection stage, the bellows oil bladder 3 is contracted by force. When the oil injection is stopped and the oil injection equipment is removed, the pressure in the oil storage chamber 1 decreases, and the bellows oil bladder 3 will recover. Therefore, the piston is released, and the thrust generated when the bellows oil bladder 3 recovers drives the piston to extend, so as to reduce the pressure in the oil storage chamber 1 and prevent oil from overflowing. After the piston and the bellows 3 reach a balanced state, the oil injection hole 11 and the vacuum hole 12 are sealed.

[0006] During this process, in the negative pressure stage, the bellows oil bladder 3 may be overstretched and damaged. In the recovery stage of the bellows oil bladder 3, due to the recovery of the elastic body and the frictional resistance of the piston extension, the whole process takes a long time, that is, the oil injection efficiency is low. If the connecting pipe of the vacuum hole 12 or the oil injection hole 11 is pulled out before the piston is completely stationary or the bellows oil bladder 3 is completely recovered, the internal oil will overflow, resulting in insufficient internal oil injection, that is, oil injection failure.

[0007] Even if the piston stops, the bellows oil bladder 3 still has a certain amount of compression deformation due to the resistance of piston movement. When the connecting pipe of vacuum hole 12 or oil injection hole 11 is pulled out, the bellows oil bladder 3 may continue to recover. Even if the oil storage area volume decreases, causing oil to overflow, the oil injection will still fail.

[0008] In summary, how to solve the problems of low oil injection efficiency, low success rate, and difficulty in ensuring the accuracy of oil injection volume in hydraulic units is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0009] In view of this, the purpose of this invention is to provide a rapid quantitative oil injection method for downhole hydraulic modules. By locking the bellows oil bladder in advance, the volume of the oil storage area is fixed so that its volume is equal to the volume of the injected oil. Thus, when injecting oil, there is no need to consider the problem of inaccurate oil injection volume and overflow caused by the elastic movement of the bellows oil bladder, which effectively improves the oil injection efficiency, success rate and injection accuracy.

[0010] Another objective of this invention is to provide a rapid quantitative oil injection device that includes the above-mentioned rapid quantitative oil injection method for downhole hydraulic modules. By evacuating the non-oil storage area and placing a quantitative vacuum block, the bellows oil bladder is kept in a set position, thereby ensuring that the volume of the oil storage area remains constant during the oil injection process.

[0011] To achieve the above objectives, the present invention provides the following technical solution:

[0012] A method for rapid quantitative oil injection into a downhole hydraulic module includes:

[0013] The limiting component is set in the oil storage cavity to make the bellows oil bladder contract under force to stop contracting after it has contracted to a set amount, so as to keep the volume of the oil storage area in the oil storage cavity constant.

[0014] A force is applied to the bellows oil bladder to cause it to contract under force and maintain the set contraction amount.

[0015] The negative pressure conduction vacuum hole is used to create a negative pressure in the oil storage area;

[0016] Oil is added to the oil storage area through the oil injection hole until the oil overflows from the vacuum hole at the high position;

[0017] Seal the vacuum hole and rotate the oil storage chamber until the oil injection hole is in the high position;

[0018] Seal the oil injection hole;

[0019] Stop applying force to the bellows oil bladder.

[0020] Preferably, a force is applied to the bellows oil bladder to cause the bellows oil bladder to contract under force and to maintain the set amount of contraction.

[0021] The force is the negative pressure generated by the negative pressure conduction of the non-oil storage area of ​​the oil storage chamber, so that the bellows oil bladder contracts to its maximum contraction amount under the action of negative pressure, thereby reducing the volume of the non-oil storage area to a set value.

[0022] Preferably, the limiting component is set in the oil storage cavity to cause the bellows oil bladder to contract under force to a set amount and then stop contracting, so as to keep the volume of the oil storage area in the oil storage cavity constant.

[0023] The limiting component includes a metering vacuum block fixedly arranged in the non-oil storage area. When the bellows oil bladder reaches the set contraction amount, the inner wall of the bellows oil bladder fits against the outer wall of the metering vacuum block.

[0024] Preferably, the quantitative vacuum block seals the opening end of the non-oil storage area and connects the non-oil storage area and the negative pressure source through a negative pressure channel.

[0025] Preferably, oil is added to the oil storage area through the oil injection hole until the oil overflows from the vacuum hole at the higher position;

[0026] Stop the injection of oil into the oil injection hole and keep the negative pressure of the vacuum hole continuously open to reduce the gas content in the injected oil.

[0027] A rapid quantitative oil injection device for implementing the rapid quantitative oil injection method of the downhole hydraulic module described in any one of the above, comprising a quantitative vacuum block;

[0028] The top end of the quantitative vacuum block is a thrust surface used to abut against the inner wall of the bellows oil bladder, so as to set the maximum amount of contraction of the bellows oil bladder after being subjected to force.

[0029] The bottom outer periphery of the quantitative vacuum block is provided with a mounting boss for fixing and sealing to the open end of the non-oil storage area;

[0030] The quantitative vacuum block has a negative pressure channel inside, and the two ends of the negative pressure channel are connected to the outer peripheral wall and the bottom end face of the quantitative vacuum block.

[0031] Preferably, the negative pressure channel is a connected cross-shaped structure, and an air inlet connected to the bottom end face of the quantitative vacuum block is provided at the intersection point.

[0032] Preferably, the mounting boss abuts against the stepped surface of the non-oil storage area opening, and a sealing ring for sealing is provided between the mounting boss and the stepped surface.

[0033] Preferably, it also includes a pressure cap, which has a cylindrical structure;

[0034] The pressure cap is fixedly connected to the oil storage cavity by threads, and the inner wall of the bottom end of the pressure cap abuts against the bottom end of the metering vacuum block, so as to make the mounting boss of the metering vacuum block abut against the stepped surface for sealing.

[0035] Preferably, several sets of adjusting discs are fixedly installed on the thrust surface by bolts to change the maximum amount of contraction of the bellows oil bladder after it is subjected to force and contracts.

[0036] Preferably, the thrust surface is provided with a threaded hole, and the surface of the adjusting disc is provided with a countersunk hole at a position corresponding to the threaded hole, for connecting the countersunk bolt to the threaded hole after passing through the countersunk hole.

[0037] A second threaded hole is provided on the surface of the adjusting disc at a position that does not overlap with the countersunk hole, for connecting the next set of adjusting discs.

[0038] The rapid quantitative oil injection method for downhole hydraulic modules provided by this invention has at least the following advantages compared with the prior art:

[0039] 1. By setting a limiting component, the bellows oil bladder can stop contracting after reaching the set contraction amount when it is under force, so that the volume of the oil storage area remains constant during the oil injection process. Thus, the oil injection does not need to rely on a metering device. The oil can be quantitatively injected simply by filling the oil storage area.

[0040] 2. At the same time, during the oil filling process, a force is applied to the bellows oil bladder, so that it is always at the set amount of contraction throughout the entire oil filling process, and will not contract or expand again. This avoids the problem of oil overflow caused by the elastic movement of the bellows and the problem of the long waiting time for the bellows oil bladder to recover, which affects the oil filling efficiency. In addition, during the vacuuming process in the oil storage area, the bellows oil bladder will not be damaged due to excessive expansion.

[0041] The rapid quantitative oil injection device provided by this invention is used to implement the above-mentioned rapid quantitative oil injection method for downhole hydraulic modules, and has at least the following beneficial effects compared with the prior art:

[0042] A thrust surface is provided to limit the shrinkage of the bellows oil bladder. A mounting boss is used to fix the quantitative vacuum block to the oil storage chamber and seal the non-oil storage area. At the same time, the negative pressure channel inside can quickly evacuate the non-oil storage area, so that the bellows oil bladder can quickly reach the set shrinkage amount. During the entire oil injection process, the shrinkage amount remains constant under the negative pressure of the non-oil storage area, which helps to improve the accuracy and efficiency of oil injection. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of a design scheme in the prior art;

[0045] Figure 2 A schematic diagram of the specific rapid quantitative oil injection device provided by the present invention;

[0046] Figure 3 This is a schematic diagram of the structure of the specific quantitative vacuum block provided by the present invention;

[0047] Figure 4 This is a schematic diagram of the structure of the quantitative vacuum block in another embodiment of the present invention;

[0048] Figure 5 This is a schematic diagram of the process for a rapid quantitative oil injection method for a specific downhole hydraulic module provided by the present invention.

[0049] Figures 1-5 middle:

[0050] 1. Oil reservoir; 11. Oil injection hole; 12. Vacuum hole; 2. Piston chamber; 3. Bellows oil bladder; 4. Metering vacuum block; 41. Air inlet; 42. Negative pressure channel; 43. Thrust surface; 44. Adjusting plate; 45. Countersunk bolt; 5. Pressure cap; 6. Sealing ring. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] The core of this invention is to provide a rapid quantitative oil injection method for downhole hydraulic modules. By locking the bellows oil bladder in advance, the volume of the oil storage area is fixed so that its volume is equal to the volume of the injected oil. Thus, when injecting oil, there is no need to consider the problem of inaccurate oil injection volume and overflow caused by the elastic movement of the bellows oil bladder, which effectively improves the oil injection efficiency, success rate and injection accuracy.

[0053] Another core aspect of this invention is to provide a rapid quantitative oil injection device that includes the aforementioned rapid quantitative oil injection method for downhole hydraulic modules. By evacuating the non-oil storage area and placing a quantitative vacuum block, the bellows oil bladder is kept in a set position, thus ensuring that the volume of the oil storage area remains constant during the oil injection process.

[0054] Please refer to Figures 2-5 A method for rapid quantitative oil injection into a downhole hydraulic module, comprising:

[0055] The limiting component is set in the oil storage chamber 1 to make the bellows oil bladder 3 stop contracting after being forced to contract to a set amount, so as to keep the volume of the oil storage area in the oil storage chamber 1 constant.

[0056] A force is applied to the bellows oil bladder 3 to cause the bellows oil bladder 3 to contract under force and maintain a set amount of contraction.

[0057] The negative pressure conduction vacuum hole 12 is used to create a negative pressure in the oil storage area.

[0058] Oil is added to the oil storage area through the oil injection hole 11 until the oil overflows from the high-level vacuum hole 12;

[0059] Seal the vacuum hole 12, rotate the oil storage chamber 1 until the oil injection hole 11 is in the high position;

[0060] Seal the oil injection hole 11;

[0061] Stop applying force to the bellows oil bladder 3.

[0062] By setting a limiting component in the oil storage chamber 1, the bellows oil bladder 3 can stop contracting after being compressed to the set amount of compression, thereby making the oil storage area have a constant volume. When this volume is equal to the amount of oil injected, the oil storage area can be filled directly without the aid of a metering device, thus realizing the quantitative injection of oil and solving the problem of inaccurate oil injection caused by oil residue in the metering device pipeline.

[0063] At the same time, a force is applied to the bellows oil bladder 3, causing it to contract and maintain the set contraction amount throughout the entire oil injection process. That is, during the entire oil injection process, there is no need to consider the change in the volume of the oil storage area caused by the expansion or contraction of the bellows oil bladder 3, nor is there a need to consider the oil overflow problem caused by the recovery process of the bellows oil bladder 3 after oil injection. At the same time, there is no need to consider the problem of excessive expansion and damage of the bellows oil bladder 3 during the negative pressure extraction process of the oil storage area, thereby improving the service life of the hydraulic module.

[0064] Applying negative pressure to the oil storage area before adding oil can increase the oil adding speed, reduce the time required for oil adding, and thus improve efficiency.

[0065] After the oil storage area is filled with oil, the vacuum hole 12 and the oil injection hole 11 are sealed, and then the force applied to the bellows oil bladder 3 is removed. At this time, the oil storage area is filled with oil. The oil itself has a low compressibility, so the recovery amount of the bellows oil bladder 3 is limited. Moreover, the vacuum hole 12 and the oil injection hole 11 are completely sealed, so there is no problem of oil overflow.

[0066] During the oil injection process, although the oil will overflow from the vacuum hole 12, the volume of the oil storage area remains constant, and the oil injection hole 11 continuously injects oil. That is, the amount of oil in the oil storage area is equal to the volume of the oil storage area, which ensures the accuracy of the oil injection amount.

[0067] In some embodiments, a force is applied to the bellows oil bladder 3 to cause the bellows oil bladder 3 to contract under force and maintain a set amount of contraction.

[0068] The force is the negative pressure generated by the negative pressure conduction of the non-oil storage area of ​​the oil storage chamber 1, so that the bellows oil bladder 3 contracts to the maximum contraction amount under the action of negative pressure, thereby reducing the volume of the non-oil storage area to the set value.

[0069] By using negative pressure to draw pressure from the non-oil storage area, the bellows bladder 3 can quickly contract to the set amount of contraction. Without removing the negative pressure, the bellows bladder 3 will not return to its original shape, thus effectively ensuring the constant volume of the oil storage area. Furthermore, by using negative pressure, there is no need to add connection points to the bellows bladder 3, which will not affect the airtightness of the bellows bladder 3. At the same time, it will not add other impurities to the oil storage area, effectively ensuring the working stability of the hydraulic module.

[0070] In some embodiments, a limiting component is disposed in the oil storage chamber 1 to cause the bellows oil bladder 3 to contract under force to a set contraction amount and then stop contracting, so as to keep the volume of the oil storage area in the oil storage chamber 1 constant.

[0071] The limiting component includes a metering vacuum block 4 fixedly arranged in the non-oil storage area. When the bellows oil bladder 3 reaches the set contraction amount, the inner wall of the bellows oil bladder 3 fits against the outer wall of the metering vacuum block 4.

[0072] By setting a quantitative vacuum block 4, the limiting component has a fixed limiting position during multiple assembly processes, that is, after each assembly, the oil storage area has an equal volume, thereby ensuring the accuracy of the oil injection amount each time.

[0073] In some embodiments, the quantitative vacuum block 4 seals the opening end of the non-oil storage area and connects the non-oil storage area and the negative pressure source through the negative pressure channel 42;

[0074] The negative pressure channel 42 is integrated into the quantitative vacuum block 4. While installing the quantitative vacuum block 4, the non-oil storage area is sealed. Then, the vacuuming operation of the non-oil storage area is carried out with the help of the negative pressure channel 42, which further reduces the preparation procedures before oil injection and improves the oil injection efficiency.

[0075] In some embodiments, oil is added to the oil storage area through the oil injection hole 11 until the oil overflows from the high-level vacuum hole 12;

[0076] Stop the injection of oil into the oil injection hole 11 and keep the negative pressure of the vacuum hole 12 continuously connected to reduce the gas content in the injected oil.

[0077] By continuously drawing a vacuum, the gas content in the hydraulic fluid can be effectively reduced, thereby reducing the expansion rate of the hydraulic fluid under high temperature conditions and ensuring the stable operation of the hydraulic module.

[0078] In addition to the rapid quantitative oil injection method for downhole hydraulic modules disclosed in the above embodiments, the present invention also provides a rapid quantitative oil injection device for implementing the above rapid quantitative oil injection method for downhole hydraulic modules, including a quantitative vacuum block 4;

[0079] The top end of the quantitative vacuum block 4 is a thrust surface 43, which is used to abut against the inner wall of the bellows oil bladder 3 to set the maximum amount of contraction after the bellows oil bladder 3 is subjected to force and contraction.

[0080] The bottom outer periphery of the quantitative vacuum block 4 is provided with a mounting boss for fixing and sealing the open end of the non-oil storage area;

[0081] The quantitative vacuum block 4 is provided with a negative pressure channel 42 inside, and the two ends of the negative pressure channel 42 are connected to the outer peripheral wall and the bottom end face of the quantitative vacuum block 4.

[0082] like Figure 2 and Figure 3 As shown, the top serves as the thrust surface 43. When the bellows oil bladder 3 contracts to the point of contacting the thrust surface 43, it can no longer contract, thus ensuring that the bellows oil bladder 3 remains at the set contraction amount, thereby ensuring that the volume of the oil storage area remains constant.

[0083] By setting up mounting bosses to fix and seal with the non-oil storage area, the installation position of the quantitative vacuum block 4 can be effectively guaranteed to be accurate, that is, to ensure that the oil storage area has the same oil storage volume after each installation, and to facilitate the improvement of the sealing performance of the non-oil storage area.

[0084] By setting up negative pressure channel 42, it is convenient to perform vacuuming operations in non-oil storage areas.

[0085] In some embodiments, the negative pressure channel 42 is a connected cross-shaped structure, and an air inlet 41 connected to the bottom end face of the quantitative vacuum block 4 is provided at the intersection point.

[0086] The negative pressure channel 42 is set in a cross shape, and multiple ports are located on the outer circumference of the quantitative vacuum block 4, which effectively prevents the bellows oil bladder 3 from blocking the negative pressure channel 42 after it contracts. The air inlet 41 of the other port of the negative pressure channel 42 is set on the bottom end face, which facilitates the arrangement of the air path and improves the convenience of operation.

[0087] In some embodiments, the mounting boss abuts against the stepped surface at the opening end of the non-oil storage area, and a sealing ring 6 for sealing is provided between the mounting boss and the stepped surface.

[0088] By setting the mounting boss to abut against the stepped surface, the quantitative vacuum block 4 is easily installed and positioned. At the same time, the addition of the O-ring seal 6 helps to improve the sealing performance of the non-oil storage area.

[0089] In some embodiments, a pressure cap 5 is also included, which has a cylindrical structure;

[0090] The pressure cap 5 is fixedly connected to the oil storage cavity 1 by threads. The inner wall of the bottom end of the pressure cap 5 abuts against the bottom end of the metering vacuum block 4, so as to seal the mounting boss of the metering vacuum block 4 against the stepped surface.

[0091] The gland 5 is connected by threads, which facilitates assembly and presses the metering vacuum block 4 to the open end of the non-oil storage area, so that there is a certain positive pressure between the mounting boss and the stepped surface, which allows the sealing ring 6 to deform and seal, ensuring its sealing performance. The gland 5 also limits the metering vacuum block 4, keeping it relatively fixed to the oil storage cavity 1, ensuring the stability of the metering vacuum block 4 throughout the oil injection process.

[0092] In some embodiments, several sets of adjusting discs 44 are fixedly provided on the thrust surface 43 by bolts to change the maximum amount of contraction of the bellows oil bladder 3 after it is subjected to force and contraction.

[0093] like Figure 4 As shown, several sets of detachable adjusting discs 44 are provided on the thrust surface 43. Without changing the assembly relationship of the quantitative vacuum block 4, the set contraction amount of the bellows oil bladder 3 can be changed by increasing or decreasing the number of adjusting discs 44, that is, the volume of the oil storage area can be changed, that is, the amount of oil injected can be changed.

[0094] In some embodiments, the surface of the thrust surface 43 is provided with a threaded hole, and the surface of the adjusting plate 44 is provided with a countersunk hole at a position corresponding to the threaded hole, for connecting the countersunk bolt 45 to the threaded hole after passing through the countersunk hole.

[0095] A second threaded hole is provided on the surface of the adjusting disc 44 at a position that does not overlap with the countersunk hole, for connecting the next set of adjusting discs 44;

[0096] By providing countersunk holes and threaded holes within the adjusting plate 44, the adjusting plate 44 is capable of multiple combinations. After installation, the top surface of the adjusting plate 44 does not have any protrusions, thus preventing damage to the bellows oil bladder 3.

[0097] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0098] The rapid quantitative oil injection method and device for downhole hydraulic modules provided by this invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make several improvements and modifications to this invention without departing from the principles of this invention, and these improvements and modifications also fall within the protection scope of the claims of this invention.

Claims

1. A method for rapid quantitative oil injection into a downhole hydraulic module, characterized in that, include: The limiting component is set in the oil storage chamber (1) to make the bellows oil bladder (3) shrink under force to the set shrinkage amount and then stop shrinking, so as to keep the volume of the oil storage area in the oil storage chamber (1) constant. A force is applied to the bellows oil bladder (3) to cause the bellows oil bladder (3) to contract under force and maintain the set contraction amount. The negative pressure conduction vacuum hole (12) is used to make the oil storage area negative pressure; Oil is added to the oil storage area through the oil injection hole (11) until the oil overflows from the vacuum hole (12) which is at a high position; Seal the vacuum hole (12), rotate the oil storage chamber (1) until the oil injection hole (11) is in the high position; Seal the oil injection hole (11); Stop applying force to the bellows oil bladder (3).

2. The rapid quantitative oil injection method for downhole hydraulic modules according to claim 1, characterized in that, A force is applied to the bellows oil bladder (3) to cause the bellows oil bladder (3) to contract under force and maintain the set contraction amount. The force is the negative pressure generated by the negative pressure conduction of the non-oil storage area of ​​the oil storage chamber (1), so that the bellows oil bladder (3) contracts to the maximum contraction amount under the action of negative pressure, thereby reducing the volume of the non-oil storage area to the set value.

3. The rapid quantitative oil injection method for downhole hydraulic modules according to claim 1, characterized in that, The limiting component is set in the oil storage chamber (1) to make the bellows oil bladder (3) shrink under force to the set shrinkage amount and then stop shrinking, so as to keep the volume of the oil storage area in the oil storage chamber (1) constant. The limiting component includes a quantitative vacuum block (4) fixedly arranged in the non-oil storage area. When the bellows oil bladder (3) reaches the set shrinkage amount, the inner wall of the bellows oil bladder (3) is attached to the outer wall of the quantitative vacuum block (4).

4. The rapid quantitative oil injection method for downhole hydraulic modules according to claim 3, characterized in that, The quantitative vacuum block (4) seals the opening of the non-oil storage area and connects the non-oil storage area and the negative pressure source through the negative pressure channel (42).

5. The rapid quantitative oil injection method for downhole hydraulic modules according to claim 1, characterized in that, Oil is added to the oil storage area through the oil injection hole (11) until the oil overflows from the vacuum hole (12) which is at a high position; Stop the injection of oil into the oil injection hole (11) and keep the negative pressure of the vacuum hole (12) continuously open to reduce the gas content in the injected oil.

6. A rapid quantitative oil injection device for implementing the rapid quantitative oil injection method for a downhole hydraulic module as described in any one of claims 1-5, characterized in that, Including quantitative vacuum block (4); The top end of the quantitative vacuum block (4) is a thrust surface (43) for abutting against the inner wall of the bellows oil bladder (3) to set the maximum amount of contraction after the bellows oil bladder (3) is subjected to force and contraction. The bottom outer periphery of the quantitative vacuum block (4) is provided with a mounting boss for fixing and sealing with the opening end of the non-oil storage area; The quantitative vacuum block (4) is provided with a negative pressure channel (42) inside, and the two ends of the negative pressure channel (42) are connected to the outer peripheral wall and the bottom end face of the quantitative vacuum block (4).

7. The rapid quantitative oil injection device according to claim 6, characterized in that, The negative pressure channel (42) is a connected cross-shaped structure, and an air inlet (41) connected to the bottom end face of the quantitative vacuum block (4) is provided at the intersection.

8. The rapid quantitative oil injection device according to claim 6, characterized in that, The mounting boss abuts against the stepped surface of the non-oil storage area opening, and a sealing ring (6) is provided between the mounting boss and the stepped surface for sealing.

9. The rapid quantitative oil injection device according to claim 8, characterized in that, It also includes a pressure cap (5), which has a cylindrical structure; The pressure cap (5) is fixedly connected to the oil storage cavity (1) by threads. The inner wall of the bottom end of the pressure cap (5) abuts against the bottom end of the quantitative vacuum block (4) to make the mounting boss of the quantitative vacuum block (4) abut against the stepped surface for sealing.

10. The rapid quantitative oil injection device according to claim 6, characterized in that, Several sets of adjusting discs (44) are fixed on the thrust surface (43) by bolts to change the maximum amount of contraction of the bellows oil bladder (3) after it is subjected to force and contraction.

11. The rapid quantitative oil injection device according to claim 6, characterized in that, The thrust surface (43) is provided with a threaded hole, and the surface of the adjusting plate (44) is provided with a countersunk hole at the position corresponding to the threaded hole, for connecting the countersunk bolt (45) to the threaded hole after passing through the countersunk hole. The surface of the adjusting disc (44) is provided with a second threaded hole at a position that does not overlap with the countersunk hole, for connecting the next set of adjusting discs (44).

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