Anti-collision protection and well descending thrust reverser for water injection well testing equipment

Abstract

The invention discloses an anti-collision protection and well descending thrust reverser for water injection well testing equipment, and belongs to the technical field of water injection well testing. A check ring is fixed to the periphery of the connector, the quick connector is connected with the connector in a sealed mode, the end of the quick connector makes contact with the check ring, a coupling is arranged on the periphery of the check ring and the periphery of the quick connector, one end of the flow blocking pipe extends into the connector and is fixedly connected with the connector, and the periphery of the thin end of the flow blocking pipe is sleeved with a resistance spring. A center hole a and a center hole b are formed in the flow blocking pipe and the connector in a penetrating mode respectively, and the center hole a is communicated with the center hole b. The device has the beneficial effects that the cable head part and the cable are effectively prevented from being impacted and damaged, and the problem that an instrument is difficult to put down is solved.

Description

Technical Field

[0001] The invention relates to an anti-collision protection and well-downward thrust device for water injection well testing equipment, belonging to the technical field of water injection well testing. Background Art

[0002] After the oil field is put into development, as the mining time increases, the energy of the oil layer itself will be continuously consumed, and the oil layer pressure will continue to drop, causing a large amount of underground crude oil to be degassed, the viscosity to increase, the oil well production to decrease, and even the spraying and production to stop, resulting in a large amount of dead oil remaining underground that cannot be extracted. In order to make up for the underground deficit caused by the extraction of crude oil, maintain or increase the oil layer pressure, achieve high and stable production of the oil field, and obtain a higher recovery rate, the oil field must be injected with water. In order to accurately monitor or allocate the amount of water injected into the formation, electronic instruments need to be used for testing, so that effective control can be achieved. In order to improve the accuracy of single-layer injection, the use of cable direct reading and allocation technology has become the mainstream process of refined water injection.

[0003] During the well testing process, lifting the cable at the wellhead can easily cause damage to the cable head components and test instruments, affecting signal reception. At the same time, increasing the weight of the downhole test instrument can cause the cable to break in the well and the test instrument to fall into the well, which requires repeated removal of the tested instrument. When replacing the cable head, the wellhead test device must be disassembled first, which will extend the working time and reduce work efficiency.

[0004] When the instrument is lowered into the well, it is difficult to lower the instrument into the wellhead due to the high injection pressure at the wellhead and the light weight of the downhole test instrument. Usually, the well is shut down to stop injection, and the pressure is reduced to release the fluid into the well. This will cause pressure fluctuations in the injection well and affect the accuracy of the test data. At the same time, the liquid flow caused by the release needs to be collected and stored, which has a certain impact on the environment and fails to meet the requirements for environmental protection. Summary of the invention

[0005] At present, new challenges have been raised regarding large overflow, damage to cable head components, difficulty in lowering instruments into the well, and inconvenience for on-site operators. To this end, the present invention proposes an anti-collision protection and reverse thrust device for water injection well testing equipment to prevent collision with cable head components and maintain the testing instrument.

[0006] The technical solution of the present invention is: an anti-collision protection and reverse thrust device for water injection well testing equipment, a retaining ring is fixed on the outer periphery of a connecting head, a quick connector is sealed and connected to the connecting head, an end of the quick connector is in contact with the retaining ring, a coupling is arranged on the outer periphery of the retaining ring and the quick connector, one end of a choke tube extends into the connecting head and is fixedly connected to the connecting head, a resistance spring is sleeved on the outer periphery of the thin end of the choke tube, a center hole a and a center hole b are respectively penetrated in the choke tube and the connecting head, and the center hole a is communicated with the center hole b.

[0007] The center hole a and the center hole b have the same aperture.

[0008] The center hole a is coaxial with the center hole b.

[0009] The resistance spring is longer than the thin end of the choke tube.

[0010] The quick connector and the connector are sealed by an O-ring.

[0011] The O-type sealing ring is an O-type fluororubber sealing ring.

[0012] The quick connector is threadedly connected to the connector.

[0013] The choke tube and the connector are sealed and connected via an O-type fluororubber sealing ring.

[0014] The retaining ring is fixed on the outer periphery of the connecting head by fixing bolts.

[0015] The resistance spring is located at the proximal end of the blowout preventer, and the blowout pipe is located at the wellhead of the water injection well.

[0016] The beneficial effects of the present invention are as follows: during the testing of the water injection well, by lifting the cable at the wellhead, compressing the spring and then quickly lowering it, the spring forms a reaction force to push the testing instrument down, preventing the cable head from being damaged by collision, thereby reducing the counterweight of the downhole testing instrument, and also reducing the excessive tension on the cable during the lifting and lowering process, avoiding the cable being broken in the well and the testing instrument falling into the well, and solving the problems of preventing the cable head components and the cable from being damaged by collision, and the difficulty in lowering the instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 It is a partial enlarged view of the present invention.

[0019] The reference numerals in the figure are as follows: 1. connector, 2. retaining ring, 3. coupling, 4. quick connector, 5. choke tube, 6. resistance spring, 7. center hole a, 8. center hole b, 9. fixing bolt. DETAILED DESCRIPTION

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below in combination with the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0024] The following is combined with Figure 1 and 2 The present invention is further described in detail: This application is further described by taking this as an example.

[0025] Example 1

[0026] A device for anti-collision protection and reverse thrust in a well for testing equipment of a water injection well, wherein a retaining ring 2 is fixed on the outer periphery of a connector 1, a quick connector 4 is sealed and connected to the connector 1, an end of the quick connector 4 is in contact with the retaining ring 2, a coupling 3 is arranged on the outer periphery of the retaining ring 2 and the quick connector 4, one end of a choke tube 5 extends into the connector 1 and is fixedly connected to the connector 1, a resistance spring 6 is sleeved on the outer periphery of the thin end of the choke tube 5, the resistance spring 6 is located at the proximal end of the blowout preventer, the blowout pipe is located at the wellhead of the water injection well, during the testing of the water injection well, the resistance spring 6 is compressed by pulling up the cable at the wellhead and then quickly releasing the resistance spring 6. The resistance spring 6 is quickly lowered, so that the resistance spring 6 forms a reaction force to push the test instrument down, preventing the cable head from being damaged by impact, thereby reducing the counterweight of the downhole test instrument and reducing the excessive tension on the cable during the lifting and lowering process, avoiding the cable being broken in the well and the test instrument falling into the well. The choke tube 5 and the connector 1 are respectively penetrated by a center hole a7 and a center hole b8, and the center hole a7 is connected to the center hole b8. The cable passes through the choke tube 5 and the connector 1 respectively through the center hole a7 and the center hole b8, so that the cable penetrates the device as a whole.

[0027] Example 2

[0028] A device for anti-collision protection and reverse thrust in the well for testing equipment of a water injection well, wherein a retaining ring 2 is fixed on the periphery of a connector 1, a quick connector 4 is sealed and connected to the connector 1, an end of the quick connector 4 is in contact with the retaining ring 2, a coupling 3 is arranged on the periphery of the retaining ring 2 and the quick connector 4, one end of a choke tube 5 extends into the connector 1 and is fixedly connected to the connector 1, a resistance spring 6 is sleeved on the periphery of the thin end of the choke tube 5, a center hole a7 and a center hole b8 are respectively penetrated in the choke tube 5 and the connector 1, the center hole a7 is coaxially connected with the center hole b8, and the center hole a7 and the center hole b8 have the same aperture, a cable passes through the choke tube 5 and the connector 1 respectively through the center hole a7 and the center hole b8, so that the cable penetrates the device as a whole.

[0029] By adding anti-collision spring parts, the cable head components and cables can be protected, which can better ensure the efficient operation of underground testing work.

[0030] Example 3

[0031] A device for anti-collision protection and reverse thrust of water injection well testing equipment, wherein a retaining ring 2 is fixed on the outer periphery of a connector 1, a quick connector 4 is sealed and connected to the connector 1, an end of the quick connector 4 is in contact with the retaining ring 2, a coupling 3 is arranged on the outer periphery of the retaining ring 2 and the quick connector 4, one end of a choke tube 5 extends into the connector 1 and is fixedly connected to the connector 1, a resistance spring 6 is sleeved on the outer periphery of the thin end of the choke tube 5, the resistance spring 6 is longer than the thin end of the choke tube 5, so that the resistance spring 6 can contact with external objects before the thin end of the choke tube 5, play a buffering protection role, and is conducive to the compression of the resistance spring 6, the elastic force generated by the compression forms a reaction force to push the test instrument down, the choke tube 5 and the connector 1 are respectively penetrated with a center hole a7 and a center hole b8, and the center hole a7 and the center hole b8 are used for the cable line of the detection equipment to penetrate the whole of the device.

[0032] Example 4

[0033] A collision protection and reverse thrust device for water injection well testing equipment, a retaining ring 2 is fixed to the outer periphery of a connector 1 by fixing bolts 9, a quick connector 4 is sealed and connected to the connector 1, an end of the quick connector 4 is in contact with the retaining ring 2, a coupling 3 is provided on the outer periphery of the retaining ring 2 and the quick connector 4, one end of a choke tube 5 extends into the connector 1 and is fixedly connected to the connector 1, a resistance spring 6 is sleeved on the outer periphery of the thin end of the choke tube 5, and the resistance spring 6 is longer than the thin end of the choke tube 5, and the choke tube 5 and the connector 1 are respectively penetrated with a center hole a7 and a center hole b8 for a cable passing through the detection equipment.

[0034] Example 5

[0035] A collision protection and well-going reverse thrust device for water injection well testing equipment, a retaining ring 2 is fixed on the outer periphery of a connector 1, a quick connector 4 is threadedly connected to the connector 1 and sealed by an O-ring, the O-ring is made of fluororubber material, the end of the quick connector 4 is in contact with the retaining ring 2, a coupling 3 is arranged on the outer periphery of the retaining ring 2 and the quick connector 4, one end of a choke tube 5 extends into the connector 1 and is fixed to the connector 1, the choke tube 5 and the connector 1 are sealed and connected by an O-ring fluororubber sealing ring, a resistance spring 6 is sleeved on the outer periphery of the thin end of the choke tube 5, the resistance spring 6 is longer than the thin end of the choke tube 5, the choke tube 5 and the connector 1 are respectively penetrated with a center hole a7 and a center hole b8 for a cable passing through a detection device.

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A water injection well test equipment anti-collision protection and well reverse thrust device, characterized in that: A retaining ring (2) is fixed on the outer periphery of the connector (1), the quick connector (4) is sealedly connected to the connector (1), the end of the quick connector (4) is in contact with the retaining ring (2), a coupling hoop (3) is provided on the outer periphery of the retaining ring (2) and the quick connector (4), one end of the choke tube (5) extends into the connector (1) and is fixedly connected to the connector (1), a resistance spring (6) is sleeved on the outer periphery of the thin end of the choke tube (5), a center hole a (7) and a center hole b (8) are respectively penetrated in the choke tube (5) and the connector (1), and the center hole a (7) is connected to the center hole b (8).

2. The anti-collision protection and reverse thrust device for water injection well testing equipment according to claim 1 is characterized in that: The center hole a (7) and the center hole b (8) have the same diameter.

3. The anti-collision protection and reverse thrust device for water injection well testing equipment according to claim 1 is characterized in that: The center hole a (7) is coaxial with the center hole b (8).

4. The anti-collision protection and reverse thrust device for water injection well testing equipment according to claim 1, characterized in that: The resistance spring (6) is longer than the thin end of the choke tube (5).

5. The anti-collision protection and reverse thrust device for water injection well testing equipment according to claim 1, characterized in that: The quick connector (4) and the connector (1) are sealed via an O-ring.

6. The anti-collision protection and reverse thrust device for water injection well testing equipment according to claim 5, characterized in that: The O-type sealing ring is an O-type fluororubber sealing ring.

7. The anti-collision protection and reverse thrust device for water injection well testing equipment according to claim 5, characterized in that: The quick connector (4) is threadedly connected to the connector (1).

8. The anti-collision protection and reverse thrust device for water injection well testing equipment according to claim 1, characterized in that: The choke tube (5) and the connector (1) are sealed and connected via an O-type fluororubber sealing ring.

9. The anti-collision protection and reverse thrust device for water injection well testing equipment according to claim 1, characterized in that: The retaining ring (2) is fixed on the outer periphery of the connecting head (1) by means of fixing bolts (9).

10. The anti-collision protection and reverse thrust device for water injection well testing equipment according to claim 1, characterized in that: The resistance spring (6) is located at the proximal end of the blowout preventer, and the blowout relief pipe is located at the wellhead of the water injection well.

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