Damping device and method for gyroscope for perforation

Abstract

The invention relates to the technical field of cable transmission directional perforation, and discloses a damping device and method for a gyroscope for perforation, the damping device comprises a first damping spring, a pressure-resistant shell, an inertial device and a second damping spring, the inertial device is arranged in an inner cavity of the pressure-resistant shell, the first damping spring is mounted at the upper end of the inertial device, and the second damping spring is mounted at the lower end of the inertial device. The first damping spring is installed at the lower end of the inertia device, the second damping spring is installed at the lower end of the inertia device, the first damping spring and the second damping spring are matched to be used for buffering shock waves borne by the inertia device, and the inertia device axially moves in an inner cavity of the compression-resistant shell. The springs are used at the two ends of the inertial device for buffering and damping at the same time, the thin shaft at the lower end of the inertial device penetrates through the damping springs to be inserted into the stepped counter bore in the upper end of the connector, the method can effectively resist the vibration influence of explosive shock waves on the inertial device, and the reliability of an instrument is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cable transmission directional perforating, and specifically to a shock absorption device and method for a gyroscope used in perforating. Background Art

[0002] Completion perforating construction is an important means in current oil and gas exploitation. Cable transmission directional perforating technology is the development trend of directional perforating. Cable transmission directional perforating technology integrates functions such as depth calibration, gyro azimuth determination, automatically controlling the azimuth of the perforating gun by a power device underground, and relying on ground commands to control the perforating charges layer by layer, realizing the technology of multi-layer directional perforating in one trip downhole. The working mode of the downhole perforator is explosion. Centered on the explosion point, strong shock vibration waves will be generated when the perforator perforates. These waves are transmitted through the wellbore medium, connecting subsections, and casing wall. Under the current perforating technical conditions, there are few devices for gyroscope shock absorption, and the perforator uses explosion for perforating, so the vibration waves generated have a greater impact on the gyroscope than under general working conditions, easily causing damage or reduced accuracy of inertial devices.

[0003] Therefore, the present invention aims to provide a shock absorption device and method for a gyroscope used in perforating to take corresponding shock absorption measures to protect the gyroscope. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a shock absorption device and method for a gyroscope used in perforating, which solves the problem that when the current perforator uses explosion for perforating, strong vibration waves will be generated, causing a vibration impact on the gyroscope.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A shock absorption device for a gyroscope used in perforating includes a first shock absorption spring, a compression-resistant outer shell, an inertial device, and a second shock absorption spring. The inertial device is arranged in the inner cavity of the compression-resistant outer shell. A first shock absorption spring is installed at the upper end of the inertial device, and a second shock absorption spring is installed at the lower end of the inertial device. The first shock absorption spring and the second shock absorption spring cooperate to buffer the shock wave received by the inertial device, and the inertial device axially moves in the inner cavity of the compression-resistant outer shell.

[0006] Preferably, a counterbore is provided at the upper end of the inertial device, and a stepped thin shaft is provided at the lower end of the inertial device. The inertial device is a precision instrument that can provide accurate signals such as azimuth, level, position, speed, and acceleration. The counterbore at the upper end of the inertial device is used to place the first shock absorption spring and limit it to prevent it from running off, and the stepped thin shaft at the lower end of the inertial device is used to sleeved with the second shock absorption spring.

[0007] Preferably, a step is provided at the upper end of the inner cavity of the compression-resistant housing, and the lower end of the inner cavity of the compression-resistant housing is a through-hole. The step at the upper end of the inner cavity of the compression-resistant housing limits the first shock-absorbing spring and provides a force-bearing support point for it. The through-hole at the lower end of the inner cavity of the compression-resistant housing is used to place the connector.

[0008] Preferably, the lower end of the first shock-absorbing spring is installed in the upper-end counterbore of the inertial device, and the upper end of the first shock-absorbing spring is stuck on the step at the upper end of the inner cavity of the compression-resistant housing. The upper-end counterbore of the inertial device and the step at the upper end of the inner cavity of the compression-resistant housing respectively limit the lower end and the upper end of the first shock-absorbing spring, and pre-compress the first shock-absorbing spring, thereby fixing the inertial device.

[0009] Preferably, the gyro wire led out from the upper end of the inertial device passes through the middle hole of the first shock-absorbing spring. The gyro wire is used to transmit the electrical signals of the inertial device including azimuth, horizontal, position, speed, and acceleration for the data center to process.

[0010] Preferably, a connector is placed in the inner cavity at the lower end of the compression-resistant housing. A step is provided at the upper end of the connector, and a counterbore is provided in the middle of the top of the step. The step at the upper end of the connector is used to limit the second shock-absorbing spring, and the counterbore at the top of the step of the connector is used to accurately position the inertial device axially.

[0011] Preferably, a thin shaft is sleeved on the upper end of the second shock-absorbing spring, the lower end of the second shock-absorbing spring is sleeved on the outer surface of the step of the connector, the thin shaft is slidably connected with the inner hole of the step of the connector, and the inertial device and the connector pre-compress the second shock-absorbing spring, thereby fixing the inertial device.

[0012] A shock-absorbing method for a gyroscope used in perforation includes the following method steps: Step 1: Place the first shock-absorbing spring at the step in the inner cavity of the compression-resistant housing to limit the first shock-absorbing spring; Step 2: Slowly place the inertial device in the inner cavity of the compression-resistant housing so that it contacts the end of the first shock-absorbing spring. The entire placement process of the inertial device needs to be moved slowly; Step 3: Then, sleeve the second shock-absorbing spring on the stepped thin shaft, and then place the connector in the inner cavity of the compression-resistant housing, and make the counterbore at the top of the connector cooperate with the stepped thin shaft. Spring devices are provided at both the upper and lower ends of the inertial device to enhance the shock-absorbing effect; Step 4: Adjust the axial position of the connector so that the pre-compression amounts of the first shock-absorbing spring and the second shock-absorbing spring are 1 / 4 of the free compression amount of the original spring. The pre-tightening force can fix the inertial device to a certain extent so that it will not move axially violently in a short time when the explosion shock wave comes. The first shock-absorbing spring and the second shock-absorbing spring convert the energy of the explosion shock wave into elastic potential energy and gradually consume it until the first shock-absorbing spring and the second shock-absorbing spring return to the original state.

[0013] Preferably, in the fourth step, the design parameters of the first shock-absorbing spring and the second shock-absorbing spring are different, which is used to avoid resonance of the first shock-absorbing spring and the second shock-absorbing spring caused by the explosion shock wave, resulting in more serious vibration of the inertial device and damage or reduced accuracy of the inertial device.

[0014] The present invention provides a shock-absorbing device and method for a gyroscope used in perforation. It has the following beneficial effects: The present invention uses springs at both ends of the inertial device for buffering and shock absorption, and allows the thin shaft at the lower end of the inertial device to pass through the shock-absorbing spring and insert into the step counterbore at the upper end of the connector. This method can effectively resist the vibration impact of the explosion shock wave on the inertial device and improve the reliability of the instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic internal structure diagram of the present invention; Among them, 1, the first shock-absorbing spring; 2, the compressive housing; 3, the gyro wire; 4, the inertial device; 5, the second shock-absorbing spring; 6, the connector; 7, the thin shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings 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 belong to the scope of protection of the present invention. Embodiment

[0017] Please refer to the attached Figure 1 As shown, the embodiment of the present invention provides a shock-absorbing device for a gyroscope used in perforation, including a first shock-absorbing spring 1, a compressive housing 2, an inertial device 4, and a second shock-absorbing spring 5. The first shock-absorbing spring 1, the inertial device 4, and the second shock-absorbing spring 5 are placed in the inner cavity of the compressive housing 2. The first shock-absorbing spring 1 is installed at the upper end of the inertial device 4, and the second shock-absorbing spring 5 is installed at the lower end of the inertial device 4. Both the first shock-absorbing spring 1 and the second shock-absorbing spring 5 can stretch and compress, and can buffer the shock wave received by the inertial device 4. The inertial device 4 can move axially in the inner cavity of the compressive housing 2.

[0018] Specifically, a counterbore is provided at the upper end of the inertial device 4, and a stepped thin shaft 7 is provided at the lower end of the inertial device 4. The inertial device 4 is a precision instrument that can provide accurate signals such as azimuth, level, position, speed, and acceleration. The counterbore at the upper end of the inertial device 4 is used to place the first shock-absorbing spring 1 and limit it to prevent it from deviating, and the stepped thin shaft 7 at the lower end of the inertial device 4 facilitates the second shock-absorbing spring 5 to be sleeved.

[0019] There is a step at the upper end of the inner cavity of the pressure-resistant housing 2, and the lower end of the inner cavity of the pressure-resistant housing 2 is a through-hole. The step at the upper end of the inner cavity of the pressure-resistant housing 2 limits the first shock-absorbing spring 1 and provides a force-bearing support point for it. The through-hole at the lower end of the inner cavity of the pressure-resistant housing 2 facilitates the placement of the connector 6.

[0020] The lower end of the first shock-absorbing spring 1 is installed in the counterbore at the upper end of the inertial device 4, and the upper end of the first shock-absorbing spring 1 is stuck on the step at the upper end of the inner cavity of the pressure-resistant housing 2. The counterbore at the upper end of the inertial device 4 and the step at the upper end of the inner cavity of the pressure-resistant housing 2 respectively limit the lower end and the upper end of the first shock-absorbing spring 1, and pre-compress the first shock-absorbing spring 1, thereby fixing the inertial device 4.

[0021] Specifically, the gyro wire led out from the upper end of the inertial device 4 passes through the middle hole of the first shock-absorbing spring 1. The gyro wire is used to transmit electrical signals of the inertial device 4 regarding azimuth, level, position, speed, acceleration, etc. for the data center to process.

[0022] The connector 6 is placed in the inner cavity at the lower end of the pressure-resistant housing 2. The upper end of the connector 6 is provided with a step, and a counterbore is provided in the middle of the top of the step. The step at the upper end of the connector 6 is used to limit the second shock-absorbing spring 5, and the counterbore at the top of the step of the connector 6 is used to accurately position the inertial device 4 axially.

[0023] A thin shaft 7 is sleeved on the upper end of the second shock-absorbing spring 5, the lower end of the second shock-absorbing spring 5 is sleeved on the outer surface of the step of the connector 6, and the thin shaft 7 is slidably connected with the inner hole of the step of the connector 6. The inertial device 4 and the connector 6 pre-compress the second shock-absorbing spring 5, thereby fixing the inertial device 4.

[0024] Furthermore, the embodiment of the present invention also provides a shock-absorbing method for a gyroscope used in perforation. Using the shock-absorbing method for a gyroscope used in perforation mentioned in this embodiment, the specific method steps are as follows: Step 1: Place the first shock-absorbing spring 1 at the step in the inner cavity of the pressure-resistant housing 2 to limit the first shock-absorbing spring 1; Step 2: Slowly place the inertial device 4 in the inner cavity of the pressure-resistant housing 2 so that it contacts the end of the first shock-absorbing spring 1. The entire placement process of the inertial device 4 needs to be moved slowly; Step 3: Then, sleeve the second shock-absorbing spring 5 on the stepped thin shaft 7, and then place the connector 6 in the inner cavity of the pressure-resistant housing 2, and make the counterbore at the top of the connector 6 cooperate with the stepped thin shaft 7. Spring devices are provided at both the upper and lower ends of the inertial device 4 to enhance the shock-absorbing effect; Step 4: Adjust the axial position of the joint 6 so that the pre-compression amounts of the first shock-absorbing spring 1 and the second shock-absorbing spring 5 are 1 / 4 of the free compression amount of the original springs. The pre-tightening force can fix the inertial device 4 to a certain extent, so that it will not move violently axially in a short time when the explosion shock wave comes. The first shock-absorbing spring 1 and the second shock-absorbing spring 5 convert the energy of the explosion shock wave into elastic potential energy and gradually consume it until the first shock-absorbing spring 1 and the second shock-absorbing spring 5 return to their original states; Specifically, in this step, the design parameters of the first shock-absorbing spring 1 and the second shock-absorbing spring 5 are different. The purpose is to avoid the resonance effect of the explosion shock wave on the first shock-absorbing spring 1 and the second shock-absorbing spring 5, causing more serious vibration to the inertial device 4 and resulting in damage or reduced accuracy of the inertial device 4.

[0025] In this embodiment, by using springs at both ends of the inertial device 4 for shock absorption and buffering, and allowing the stepped thin shaft 7 at the lower end of the inertial device 4 to pass through the spring and insert into the stepped counterbore at the upper end of the joint 6, this method can effectively resist the vibration impact of the explosion shock wave on the inertial device 4 and improve the reliability of the instrument.

[0026] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A shock-absorbing device for a gyroscope used in perforation, comprising a first shock-absorbing spring (1), a compression-resistant outer shell (2), an inertial device (4), and a second shock-absorbing spring (5). Characterized in that: The inertial device (4) is arranged in the inner cavity of the compression-resistant outer shell (2). A first shock-absorbing spring (1) is installed at the upper end of the inertial device (4), and the second shock-absorbing spring (5) is installed at the lower end of the inertial device (4). The first shock-absorbing spring (1) and the second shock-absorbing spring (5) cooperate to buffer the shock wave received by the inertial device (4), and the inertial device (4) moves axially in the inner cavity of the compression-resistant outer shell (2).

2. The shock-absorbing device for a gyroscope used in perforation according to claim 1, Characterized in that, A counterbore is provided at the upper end of the inertial device (4), and a stepped thin shaft (7) is provided at the lower end of the inertial device (4). The inertial device (4) belongs to a precision instrument and can provide signals such as accurate azimuth, level, position, speed, and acceleration. The counterbore at the upper end of the inertial device (4) is used to place the first shock-absorbing spring (1) and limit it to prevent it from running off, and the stepped thin shaft (7) at the lower end of the inertial device (4) is used to sleeved the second shock-absorbing spring (5).

3. The shock-absorbing device for a gyroscope used in perforation according to claim 1, Characterized in that, A step is provided at the upper end of the inner cavity of the compression-resistant outer shell (2), and the lower end of the inner cavity of the compression-resistant outer shell (2) is a through hole. The step at the upper end of the inner cavity of the compression-resistant outer shell (2) limits the first shock-absorbing spring (1) and provides a force-bearing support point for it. The through hole at the lower end of the inner cavity of the compression-resistant outer shell (2) is used to place the joint (6).

4. The shock-absorbing device for a gyroscope used in perforation according to claim 1, Characterized in that, The lower end of the first shock-absorbing spring (1) is installed in the counterbore at the upper end of the inertial device (4), and the upper end of the first shock-absorbing spring (1) is stuck on the step at the upper end of the inner cavity of the compression-resistant outer shell (2). The counterbore at the upper end of the inertial device (4) and the step at the upper end of the inner cavity of the compression-resistant outer shell (2) respectively limit the lower end and the upper end of the first shock-absorbing spring (1), and pre-compress the first shock-absorbing spring (1), thereby fixing the inertial device (4).

5. The shock-absorbing device for a gyroscope used in perforation according to claim 1, Characterized in that, The gyro wire (3) led out from the upper end of the inertial device (4) passes through the middle hole of the first shock-absorbing spring (1). The gyro wire (3) is used to transmit the electrical signals of the inertial device (4) including azimuth, level, position, speed, and acceleration for processing by the data center.

6. The shock-absorbing device for a gyroscope used in perforation according to claim 1, Characterized in that, A joint (6) is placed in the lower inner cavity of the compression-resistant outer shell (2). A step is provided at the upper end of the joint (6), and a counterbore is provided in the middle of the top of the step. The step at the upper end of the joint (6) is used to limit the second shock-absorbing spring (5), and the counterbore at the top of the step of the joint (6) is used to accurately position the inertial device (4) axially.

7. A shock-absorbing device for a gyroscope used in perforation, according to claim 1, characterized in that, a thin shaft (7) is sleeved on the upper end of the second shock-absorbing spring (5), the lower end of the second shock-absorbing spring (5) is sleeved on the outer surface of the step of the joint (6), the thin shaft (7) is slidably connected with the inner hole of the step of the joint (6), and the inertial device (4) and the joint (6) pre-compress the second shock-absorbing spring (5) to fix the inertial device (4).

8. A shock-absorbing method for a gyroscope used in perforation, characterized in that, using the shock-absorbing device for a gyroscope used in perforation according to any one of claims 1-7, including the following method steps: Step 1: Place the first shock-absorbing spring (1) at the step of the inner cavity of the compression-resistant housing (2) to limit the first shock-absorbing spring (1); Step 2: Slowly place the inertial device (4) into the inner cavity of the compression-resistant housing (2) so that it contacts the end of the first shock-absorbing spring (1). The entire placement process of the inertial device (4) needs to be slowly moved; Step 3: Then, sleeve the second shock-absorbing spring (5) on the stepped thin shaft (7), and then place the joint (6) into the inner cavity of the compression-resistant housing (2), and make the counterbore at the top of the joint (6) cooperate with the stepped thin shaft (7). Spring devices are provided at both the upper and lower ends of the inertial device (4) to enhance the shock-absorbing effect; Step 4: Adjust the axial position of the joint (6) so that the pre-compression amounts of the first shock-absorbing spring (1) and the second shock-absorbing spring (5) are 1 / 4 of the free compression amount of the original spring. The pre-tightening force can fix the inertial device (4) to a certain extent, so that when the explosion shock wave comes, it will not move axially violently in a short time. The first shock-absorbing spring (1) and the second shock-absorbing spring (5) convert the energy of the explosion shock wave into elastic potential energy and gradually consume it until the first shock-absorbing spring (1) and the second shock-absorbing spring (5) return to the original state.

9. A shock-absorbing method for a gyroscope used in perforation, according to claim 8, characterized in that, in the step 4, the design parameters of the first shock-absorbing spring (1) and the second shock-absorbing spring (5) are different to avoid resonance of the explosion shock wave on the first shock-absorbing spring (1) and the second shock-absorbing spring (5), resulting in more serious vibration of the inertial device (4) and causing damage or reduced accuracy of the inertial device (4).

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