Novel testing device of packer and testing method of novel testing device

Abstract

The invention relates to the technical field of packer testing, and discloses a novel packer testing device and a novel packer testing method.The novel packer testing device comprises a base, a water tank is fixedly installed at the top of the base, supporting rods are fixedly installed at the four corners of the top of the base, and a top plate is fixedly installed among the tops of the four supporting rods; a controller is fixedly installed on the front face of the water tank, and a lifting mechanism is fixedly installed at the bottom of the top plate. According to the novel testing device for the packer and the testing method of the novel testing device, the driving motor, the threaded rod, the threaded block, the transverse plate and the packer body are arranged, the packer body is placed on the transverse plate, the transverse plate is driven by the driving motor to move up and down, conveying of the packer body is facilitated, meanwhile, the clamping mechanism is arranged, and the clamping mechanism is used for clamping the packer body. When the packer body is clamped, the sealing effect is achieved, the packer body is conveyed into the water tank, and external air is conveyed into the packer body through the corrugated pipe and the connecting cylinder under the starting of the sucking pump.

Description

Technical Field

[0001] The present invention relates to the technical field of packer testing, and specifically to a new testing device for a packer and an experimental method thereof. Background Art

[0002] A packer refers to a downhole tool with an elastic sealing element, which seals the annular space between various sized pipe strings and the wellbore, as well as between pipe strings, isolates the production layer, controls the produced fluid, and protects the casing. In oil production engineering, packers are used for zonal isolation. There is an oil production channel designed on the packer. When setting the packer, the piston sleeve moves upward and the oil production channel is opened. After setting, the upper layer pressure acts on the balance piston, pushing the rubber cylinder upward, so that the release pin is protected from shear force. When releasing the packer, the release pin is sheared off by the friction between the rubber cylinder and the casing, and the piston sleeve moves downward to close the oil production channel. Before use, the packer often needs to be tested for its sealing performance to observe the sealing condition of the packer.

[0003] After retrieval, a device for detecting the seal leakage of a packer is disclosed in the utility model with the Chinese patent number "CN216669174U". This device for detecting the seal leakage of a packer judges the helium leakage of the packer through a helium mass spectrometer leak detector. At the same time, it can judge the leakage speed during the time period before and after the packer leaks through the judgment of the helium leakage rate on the helium mass spectrometer leak detector, and whether the gas tightness test leakage can reach true zero leakage, so as to realize the judgment of zero leakage of the packer and the judgment of the leakage speed when the packer leaks. However, due to the disadvantages of this detection method that the equipment vacuum pumping process is slow and the efficiency is lower for larger products, and the negative pressure provided by the machine is limited and cannot provide detection under large pressure conditions, a new testing device for a packer and an experimental method thereof are proposed to solve the above-mentioned problems. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the present invention provides a new testing device for a packer and an experimental method thereof, which have the advantages of high detection efficiency, and solve the problems that the equipment vacuum pumping process is slow and the efficiency is lower for larger products, and the negative pressure provided by the machine is limited and cannot provide detection under large pressure conditions due to the disadvantages of this detection method.

[0006] (2) Technical Solutions

[0007] To achieve the above object of high detection efficiency, the present invention provides the following technical solution: a novel test device for a packer, including a base, on the top of which a water tank is fixedly installed. At the four corners of the top of the base, support rods are fixedly installed, and a top plate is fixedly installed between the tops of the four support rods. A controller is fixedly installed on the front of the water tank. A lifting mechanism is fixedly installed at the bottom of the top plate. A clamping mechanism is arranged inside the water tank. A gas delivery mechanism is fixedly installed on the top of the top plate.

[0008] The lifting mechanism includes a driving motor fixedly installed inside the top plate. A threaded rod is fixedly installed at the output shaft of the driving motor. A threaded block is threadedly connected to the outer surface of the threaded rod. A cross plate is fixedly installed on the left side of the threaded block.

[0009] The clamping mechanism includes a cavity. A cavity is formed inside the cross plate. A servo motor is fixedly installed on the left inner wall of the cavity. A lead screw is fixedly installed at the output shaft of the servo motor. A movable block is threadedly connected to the outer surface of the lead screw. A first collar is movably installed on the top of the cross plate. A second collar is fixedly installed on the top of the cross plate. Sealing rings are fixedly installed on the opposite sides of the second collar and the first collar.

[0010] The gas delivery mechanism includes an air extraction pump fixedly installed on the top of the top plate. A corrugated pipe is fixedly installed at the air outlet of the air extraction pump. A connector is fixedly installed at the end of the corrugated pipe away from the air extraction pump.

[0011] Preferably, a packer body is placed on the top of the cross plate, and both the left and right sides of the packer body are in contact with the sealing rings.

[0012] Preferably, the bottom of the threaded rod is rotatably connected to the inner bottom wall of the water tank.

[0013] Preferably, a sliding rod is fixedly installed between the water tank and the top plate, and a slider is slidably installed on the outer surface of the sliding rod. One end of the slider is fixedly connected to the left side of the cross plate.

[0014] Preferably, a chute is formed on the top of the cross plate, and the top of the movable block passes through the chute and is fixedly connected to the bottom of the first collar.

[0015] Preferably, an intake pipe is fixedly installed at the air inlet of the air extraction pump.

[0016] Preferably, a communicating pipe is fixedly installed inside the first collar, and the connecting cylinder communicates with the packer body.

[0017] Preferably, one end of the communicating pipe extends to the outside of the first ferrule, and an external thread is fixedly installed on the outer surface of the communicating pipe, and an internal thread adapted to the external thread is provided inside the connecting head, and the connecting head is connected to the communicating pipe.

[0018] Preferably, an observation window is fixedly installed on the front surface of the water tank, and the output end of the controller is electrically connected to the input ends of the driving motor, the servo motor and the air extraction pump through wires.

[0019] An experimental method for a new test device of a packer is as follows:

[0020] Step 1: When in use, first place the packer body on the top of the cross plate, and the left end of the packer body is precisely fitted with the sealing ring;

[0021] Step 2; Then start the servo motor through the controller. The start of the servo motor can drive the first ferrule to move, so that the sealing ring on the right side contacts the packer body;

[0022] Step 3; Then pull the corrugated pipe to connect the connecting head with the communicating pipe;

[0023] Step 4: Then drive the cross plate to move downward through the driving of the driving motor, so that the packer body is inside the water tank, and extract the air from the outside through the air extraction pump and transport it into the packer body;

[0024] Step 5: Finally, observe through the observation window whether there are bubbles in the water tank. When there are bubbles, it means that the sealing performance of the packer body is not good. When there are no bubbles, it means that the sealing performance of the packer body is good.

[0025] Beneficial effects

[0026] Compared with the prior art, the present invention provides a new test device for a packer and its experimental method, which has the following beneficial effects:

[0027] For the new test device for a packer and its experimental method, by setting the driving motor, the threaded rod, the threaded block, the cross plate and the packer body, the packer body is placed on the cross plate, and the cross plate is driven to move up and down under the drive of the driving motor, which is convenient for the transportation of the packer body. At the same time, a clamping mechanism is set, and a sealing effect is also achieved when clamping the packer body. The packer body is transported into the water tank, and when the air extraction pump is started, the air from the outside is transported into the packer body through the corrugated pipe and the connecting cylinder, and the sealing performance of the packer body is observed by observing the bubbles. Description of the drawings

[0028] Figure 1 It is a three-dimensional structure diagram of the present invention;

[0029] Figure 2Structural sectional view of the present invention;

[0030] Figure 3 Schematic structural diagram of the first ferrule and the sealing ring of the present invention;

[0031] Figure 4 For the present invention Figure 2 Enlarged view of the structure at A in the present invention.

[0032] In the figure: 1, base; 2, water tank; 3, support rod; 4, top plate; 5, controller; 6, lifting mechanism; 601, driving motor; 602, threaded rod; 603, threaded block; 7, cross plate; 8, clamping mechanism; 801, cavity; 802, servo motor; 803, lead screw; 804, movable block; 805, first ferrule; 806, sealing ring; 807, second ferrule; 9, packer body; 10, gas delivery mechanism; 1001, air extraction pump; 1002, bellows; 1003, connector. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Embodiment 1

[0035] Please refer to Figures 1-4 , a new test device for a packer, including a base 1, a water tank 2 fixedly installed on the top of the base 1, support rods 3 fixedly installed at the four corners of the top of the base 1, a top plate 4 fixedly installed between the tops of the four support rods 3, a controller 5 fixedly installed on the front of the water tank 2, a lifting mechanism 6 fixedly installed at the bottom of the top plate 4, a clamping mechanism 8 arranged inside the water tank 2, a gas delivery mechanism 10 fixedly installed on the top of the top plate 4, and a packer body 9 arranged inside the water tank 2.

[0036] It should be noted that the packer body 9 refers to a downhole tool connected to the downhole string and used to seal the annular space between the tubing and the casing of the oil and gas well or the open-hole wellbore wall. Through the cooperation among the base 1, the water tank 2, the lifting mechanism 6, the clamping mechanism 8 and the gas delivery mechanism 10 set above, a sealing test for the packer body 9 can be formed.

[0037] Embodiment 2

[0038] Please refer to Figures 1-2A new test device for a packer, the lifting mechanism 6 includes a driving motor 601, the driving motor 601 is fixedly installed inside the top plate 4, a threaded rod 602 is fixedly installed at the output shaft of the driving motor 601, the outer surface of the threaded rod 602 is threadedly connected with a threaded block 603, and a cross plate 7 is fixedly installed on the left side of the threaded block 603. The driving motor 601 can drive the threaded rod 602 to rotate, and the rotation of the threaded rod 602 can drive the threaded block 603 to move up and down, thereby realizing the up and down movement of the cross plate 7, and placing the packer body 9 on the cross plate 7 can realize the transportation of the packer body 9.

[0039] A sliding rod is fixedly installed between the water tank 2 and the top plate 4, and a slider is slidably installed on the outer surface of the sliding rod, and one end of the slider is fixedly connected to the left side of the cross plate 7. By setting the cooperation between the sliding rod and the slider, the up and down movement of the cross plate 7 can be limited. The movement of the threaded block 603 drives the cross plate 7 to move, so that the slider also moves on the sliding rod, thereby improving the stability of the movement of the cross plate 7.

[0040] Embodiment 3

[0041] See also Figures 2-3 A novel test device for a packer, wherein a clamping mechanism 8 comprises a cavity 801, a cavity 801 is provided inside a horizontal plate 7, a servo motor 802 is fixedly installed on the left inner wall of the cavity 801, a screw rod 803 is fixedly installed on the output shaft of the servo motor 802, a movable block 804 is threadedly connected to the outer surface of the screw rod 803, a No. 1 ferrule 805 is movably installed on the top of the horizontal plate 7, a No. 2 ferrule 807 is fixedly installed on the top of the horizontal plate 7, and the No. 2 ferrule 807 and the No. 2 ferrule 807 are connected to the ferrule 804. A sealing ring 806 is fixedly installed on the opposite side of the No. 1 ring 805. The packer body 9 is placed on the cross plate 7, and the left end is precisely fitted with the sealing ring 806. Then, the servo motor 802 drives the screw rod 803 to rotate, and the screw rod 803 drives the movable block 804 to move, so that the movable block 804 drives the No. 1 ring 805 to move, so that the right side sealing ring 806 fits with the packer body 9, and it also has sealing properties under the clamping of the packer body 9.

[0042] Embodiment 4

[0043] See also Figure 2 A new test device for a packer is disclosed. The gas delivery mechanism 10 includes an air pump 1001. The air pump 1001 is fixedly installed on the top of the top plate 4. A bellows 1002 is fixedly installed at the air outlet of the air pump 1001. A connector 1003 is fixedly installed at one end of the bellows 1002 away from the air pump 1001. The bellows 1002 is pulled to connect the connector 1003 to the connecting pipe. The external air is extracted by the air pump 1001 and delivered to the packer body 9. The sealing performance of the packer body 9 is observed by observing bubbles.

[0044] The experimental method of a new test device for a packer is as follows:

[0045] Step 1: When in use, first place the packer body 9 on the top of the cross plate 7, and the left end of the packer body 9 is precisely fitted with the sealing ring 806;

[0046] Step 2: Then start the servo motor 802 through the controller 5. The start of the servo motor 802 can drive the movement of the first ferrule 805, so that the sealing ring 806 on the right contacts the packer body 9;

[0047] Step 3: Then pull the corrugated pipe 1002 to connect the connecting head 1003 with the communicating pipe;

[0048] Step 4: Then drive the cross plate 7 to move downward through the drive of the drive motor 601, so that the packer body 9 is inside the water tank 2, and extract the external air through the air pump 1001 and transport it into the packer body 9;

[0049] Step 5: Finally, observe through the observation window whether there are bubbles in the water tank 2. When there are bubbles, it means that the sealing performance of the packer body 9 is not good. When there are no bubbles, it means that the sealing performance of the packer body 9 is good.

[0050] In summary, for the new test device of the packer and its experimental method, by setting the drive motor 601, the threaded rod 602, the threaded block 603, the cross plate 7 and the packer body 9, placing the packer body 9 on the cross plate 7, driving the cross plate 7 to move up and down under the drive of the drive motor 601, facilitating the transportation of the packer body 9, and at the same time setting the clamping mechanism 8, achieving a sealing effect when clamping the packer body 9, transporting the packer body 9 into the water tank 2, starting the air pump 1001 to transport the external air into the packer body 9 through the corrugated pipe 1002 and the connecting cylinder, and observing the sealing performance of the packer body 9 by observing the bubbles.

[0051] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0052] Although 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 variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel test device for a packer, comprising a base (1), characterized in that: A water tank (2) is fixedly installed at the top of the base (1). Support rods (3) are fixedly installed at the four corners of the top of the base (1). A top plate (4) is fixedly installed between the tops of the four support rods (3). A controller (5) is fixedly installed on the front of the water tank (2). A lifting mechanism (6) is fixedly installed at the bottom of the top plate (4). A clamping mechanism (8) is arranged inside the water tank (2). A gas delivery mechanism (10) is fixedly installed at the top of the top plate (4); The lifting mechanism (6) includes a driving motor (601). The driving motor (601) is fixedly installed inside the top plate (4). A threaded rod (602) is fixedly installed at the output shaft of the driving motor (601). A threaded block (603) is threadedly connected to the outer surface of the threaded rod (602). A cross plate (7) is fixedly installed on the left side of the threaded block (603); The clamping mechanism (8) includes a cavity (801). A cavity (801) is formed inside the cross plate (7). A servo motor (802) is fixedly installed on the left inner wall of the cavity (801). A lead screw (803) is fixedly installed at the output shaft of the servo motor (802). A movable block (804) is threadedly connected to the outer surface of the lead screw (803). A first collar (805) is movably installed on the top of the cross plate (7). A second collar (807) is fixedly installed on the top of the cross plate (7). Sealing rings (806) are fixedly installed on the opposite sides of the second collar (807) and the first collar (805); The gas delivery mechanism (10) includes an air extraction pump (1001). The air extraction pump (1001) is fixedly installed on the top of the top plate (4). A corrugated pipe (1002) is fixedly installed at the air outlet of the air extraction pump (1001). A connector (1003) is fixedly installed at the end of the corrugated pipe (1002) away from the air extraction pump (1001).

2. The novel test device for a packer according to claim 1, characterized in that: A packer body (9) is placed on the top of the cross plate (7). The left and right sides of the packer body (9) are both in contact with the sealing rings (806).

3. The novel test device for a packer according to claim 1, characterized in that: The bottom of the threaded rod (602) is rotatably connected to the inner bottom wall of the water tank (2).

4. The novel test device for a packer according to claim 1, characterized in that: A sliding rod is fixedly installed between the water tank (2) and the top plate (4). A slider is slidably installed on the outer surface of the sliding rod. One end of the slider is fixedly connected to the left side of the cross plate (7).

5. The novel test device for a packer according to claim 1, characterized in that: A chute is formed on the top of the cross plate (7). The top of the movable block (804) passes through the chute and is fixedly connected to the bottom of the first collar (805).

6. The novel test device for a packer according to claim 1, characterized in that: An intake pipe is fixedly installed at the air inlet of the air extraction pump (1001).

7. The novel test device for a packer according to claim 2, characterized in that: A communicating pipe is fixedly installed inside the first collar (805). The connecting cylinder communicates with the packer body (9).

8. The novel test device for a packer according to claim 7, characterized in that: One end of the communicating pipe extends to the outside of the first collar (805). External threads are fixedly installed on the outer surface of the communicating pipe. Internal threads adapted to the external threads are arranged inside the connector (1003). The connector (1003) is connected to the communicating pipe.

9. The novel test device for a packer according to claim 1, characterized in that: An observation window is fixedly installed on the front of the water tank (2), and the output end of the controller (5) is electrically connected to the input ends of the driving motor (601), the servo motor (802) and the air extraction pump (1001) through wires.

10. An experimental method for a novel test device of a packer, including the experimental method of the novel test device of a packer according to any one of claims 1-9, characterized in that: The following steps: Step 1: When in use, first place the packer body (9) on the top of the cross plate (7), and the left end of the packer body (9) is precisely fitted with the sealing ring (806); Step 2; Then start the servo motor (802) through the controller (5). The start of the servo motor (802) can drive the first collar (805) to move, so that the sealing ring (806) on the right contacts the packer body (9); Step 3; Then pull the bellows (1002) to connect the connector (1003) with the communicating pipe; Step 4: Then drive the cross plate (7) to move downward through the driving of the driving motor (601), so that the packer body (9) is inside the water tank (2), and extract the external air through the air extraction pump (1001) and transport it into the packer body (9); Step 5: Finally, observe through the observation window whether there are bubbles generated in the water tank (2). When there are bubbles generated, it means that the sealing performance of the packer body (9) is not good. When no bubbles appear, it means that the sealing performance of the packer body (9) is good.

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