ARS underground detector with pushing device

Abstract

The utility model discloses an ARS underground detector with a pushing device, which comprises a pushing device shell, a circuit board, a pushing device mechanism, a lower shell and a sensor framework, the pushing device shell and the lower shell are connected end to end, the circuit board is arranged in the pushing device shell, the pushing device mechanism is arranged on the pushing device shell, and the sensor framework is arranged in the lower shell; a heat preservation mechanism used for heat preservation and heat insulation of the circuit board is further arranged in the pushing shell, and an oil pressure mechanism used for improving pressure resistance is arranged at the sealing position of the pushing mechanism. According to the utility model, the thermal insulation mechanism and the oil pressure mechanism are added in the detector, so that the pressure resistance and high temperature resistance of equipment are greatly improved, and the equipment can work in a high-temperature and high-pressure well for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of logging tools, and particularly relates to an ARS downhole geophone with a push support. Background Art

[0002] As is well known, a downhole geophone string is used for well exploration and is now widely used in various vibration monitoring fields. When the geophone string is in use, usually customers will select geophones with different natural frequencies according to the geological characteristics of the exploration block and will combine the geophones in different forms to achieve the purpose of obtaining the best geological exploration data.

[0003] During the actual logging process, the instrument needs to operate under high temperature and high pressure downhole, and there are high standards for the temperature and pressure resistance of the instrument.

[0004] The existing ARS geophone with a push support has the following problems:

[0005] (1) The temperature resistance of the circuit board of the instrument can only reach 175°C. In a downhole environment exceeding this temperature, the circuit board will be severely damaged, resulting in the instrument being unable to work. And for some logging temperature indicators higher than 175°C, this instrument cannot be used in such a downhole environment.

[0006] (2) The outer shell and sealing structure of the instrument can only withstand a downhole pressure of 140 MPa. During the actual logging process, it often happens that the downhole pressure exceeds 140 MPa. Using the instrument in such a downhole environment will cause the instrument to be crushed or the sealing effect to fail to meet the standard, resulting in problems such as enema. Content of the Utility Model

[0007] Aiming at the defects or deficiencies existing in the above-mentioned prior art, the utility model aims to provide an ARS downhole geophone with high temperature and high pressure resistance.

[0008] The purpose of this application is completed through the following technical solutions:

[0009] An ARS downhole geophone with a push support, which includes a push support outer shell, a circuit board, a push support mechanism, a lower outer shell, and a sensor skeleton. The push support outer shell and the lower outer shell are connected end to end. The circuit board is arranged inside the push support outer shell. The push support mechanism is installed on the push support outer shell. The sensor skeleton is arranged inside the lower outer shell. A heat preservation mechanism for heat preservation and heat insulation of the circuit board is also arranged in the push support outer shell. An oil pressure mechanism for improving the compressive resistance is arranged at the sealing part of the push support mechanism.

[0010] Preferably, the heat preservation mechanism includes a thermos flask, a heat insulation body, a wire-passing heat absorber, and a non-wire-passing heat absorber. The thermos flask is installed in the push-against housing, the heat insulation body is installed at one end of the thermos flask, the wire-passing heat absorber is installed on one side of the heat insulation body, the non-wire-passing heat absorber is installed at the other end of the thermos flask, and the circuit board is installed between the wire-passing heat absorber and the non-wire-passing heat absorber through a wire skeleton.

[0011] Preferably, the push-against mechanism includes a transmission shaft, a transmission wheel, a push-against arm, a ball screw, and a motor. The transmission wheel, the ball screw, and the motor are installed in the push-against housing. The push-against arm is arranged outside the push-against housing. The motor is in transmission connection with the ball screw. The translation end of the ball screw is connected to the outer swing arm of the transmission wheel. The transmission wheel is sleeved on the transmission shaft and drives the transmission shaft to rotate. The transmission shaft extends outside the push-against housing and is connected to the push-against arm through a support arm connector to drive the push-against arm to swing. Sealing rings are provided at the joints of both sides of the transmission shaft and the push-against housing.

[0012] Preferably, the oil pressure mechanism includes a first pressure-bearing block, a second pressure-bearing block, an oil injection plug, a piston, and a pressure-bearing retaining ring. An oil passage is arranged in the push-against housing. An oil injection passage and a plurality of piston passages are provided on the push-against housing. The oil injection passage and the piston passages are both communicated with the oil passage. The piston is installed in the piston passage, and the oil injection plug is installed in the oil injection passage. The first pressure-bearing block and the second pressure-bearing block are respectively located at the left and right ends of the oil passage. The pressure-bearing retaining ring is sleeved on the transmission shaft and is located inside the sealing ring.

[0013] Preferably, the push-against housing is composed of two left and right sections. The heat preservation mechanism is arranged in the left-section push-against housing, and the oil pressure mechanism is arranged in the right-section push-against housing. The two left and right sections of the push-against housing are connected through an intermediate connector.

[0014] Preferably, intermediate rings are sleeved on both sides of the transmission shaft, and a pressure-bearing retaining ring and a sealing ring are respectively sleeved on the inner and outer sides of the intermediate ring.

[0015] Preferably, there are two groups of piston passages, with 4 in each group, and the piston passages are arranged at equal intervals along the circumferential direction of the push-against housing.

[0016] Compared with the prior art, the present application has at least the following obvious advantages and effects:

[0017] 1. In the present utility model, the circuit board that can only withstand a temperature of 175 °C is placed in the thermos flask, and heat absorbers are added at both ends to absorb the heat leaking into the interior of the thermos flask from the outside, greatly increasing the working time of the instrument under ultra-high temperature conditions and enabling it to adapt to more high-temperature well conditions.

[0018] 2. The sealing structure at the pushing position in the present utility model has been improved. It has changed from the original internal air and relying solely on the sealing ring to resist pressure to using an oil injection method inside to ensure the balance of internal and external pressures at the sealing ring. As a result, under an external pressure of 206 MPa, the piston is pressed tightly, the internal oil pressure and the external pressure are balanced, and the pressures on both sides of the sealing ring are the same, enabling it to withstand higher pressures. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a sectional view of the present utility model;

[0020] Figure 2 is a three-dimensional view of the structure of the present utility model;

[0021] Figure 3 is a schematic diagram of the heat preservation mechanism section in the present utility model;

[0022] Figure 4 is a schematic diagram of the pushing mechanism section in the present utility model;

[0023] Figure 5 is Figure 1 the A - A sectional view in

[0024] Component list in this application:

[0025] 1. Pushing housing; 2. Circuit board; 3. Pushing mechanism; 4. Lower housing; 5. Sensor skeleton; 6. Heat preservation mechanism; 7. Oil pressure mechanism; 8. Intermediate connector; 11. Oil passage; 12. Oil injection passage; 13. Piston passage; 31. Transmission shaft; 32. Transmission wheel; 33. Pushing arm; 34. Ball screw; 35. Motor; 36. Sealing ring; 37. Intermediate ring; 38. Arm connector; 61. Thermos flask; 62. Heat insulator; 63. Wire - passing heat absorber; 64. Non - wire - passing heat absorber; 65. Wire skeleton; 71. First pressure - bearing block; 72. Second pressure - bearing block; 73. Oil injection plug; 74. Piston; 75. Pressure - bearing retaining ring. SPECIFIC IMPLEMENTATION MANNER

[0026] Specific embodiments of the present application are described in conjunction with the accompanying drawings and the following description to teach those skilled in the art how to make and use the best mode of the present application. For the purpose of teaching the principles of the application, some conventional aspects have been simplified or omitted. Those skilled in the art should understand that variations derived from these embodiments fall within the scope of the present application. Those skilled in the art should understand that the following features can be combined in various ways to form multiple variations of the present application. Terms such as "upper", "lower", "left", "right", "middle", and "one" cited in the present application are only for the convenience of clear narration and are not used to limit the scope of implementation of the present utility model. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope of implementation of the present utility model. Thus, the present application is not limited to the specific embodiments described below, but is defined only by the claims and their equivalents.

[0027] As Figure 1 and Figure 2 shown, this embodiment relates to an ARS downhole geophone with a push support, which includes a push support housing 1, a circuit board 2, a push support mechanism 3, a lower housing 4, and a sensor skeleton 5. The push support housing 1 and the lower housing 4 are connected end to end. The circuit board 2 is arranged inside the push support housing 1. The push support mechanism 3 is installed on the push support housing 1. The sensor skeleton 5 is arranged inside the lower housing 4. A heat preservation mechanism 6 and an oil pressure mechanism 7 are also arranged in the push support housing 1. The circuit board 2 is installed in the heat preservation mechanism 6, and heat insulation is achieved through the heat preservation mechanism 6, thereby improving the high-temperature resistance performance of the geophone. The oil pressure mechanism 7 is arranged at the sealing part of the push support mechanism 3 and is used to improve the high-pressure resistance of the geophone.

[0028] As Figure 3 shown, in the embodiment of the present application, the heat preservation mechanism 6 includes a thermos 61, a heat insulation body 62, a wire-passing heat absorber 63, and a non-wire-passing heat absorber 64. The thermos 61 is installed inside the push support housing 1 along the length direction of the push support housing 1. The heat insulation body 62 is installed at the opening end of the thermos 61. The wire-passing heat absorber 63 is installed on one side of the heat insulation body 62. The non-wire-passing heat absorber 64 is installed at the other end of the thermos 61. The circuit board 2 is installed between the wire-passing heat absorber 63 and the non-wire-passing heat absorber 64 through a wire skeleton 65. The circuit board 2 that can only withstand a temperature of 175°C is placed in the thermos 61. Both ends of the circuit board 2 absorb the heat leaking into the interior of the thermos 61 from the outside through the wire-passing heat absorber 63 and the non-wire-passing heat absorber 64. The opening end of the thermos 61 uses a heat insulation body 62 made of PEEK to isolate the temperature conduction at the opening, greatly increasing the working time of the instrument under ultra-high temperature conditions and enabling it to adapt to more high-temperature well conditions.

[0029] In this application, the thermos 61 used is an eccentric thermos with a single-end opening. The reason for not using a double-end opening is that a double-end opening thermos has higher heat leakage and requires more heat absorbers to absorb heat, which will inevitably make the instrument longer. The eccentric structure is used to better route the wire from the outside of the thermos 61. The eccentric method creates a height for single-side wire routing, minimizing the possibility of wire pressing.

[0030] As Figure 4 and Figure 5 shown, the pushing mechanism 3 includes a transmission shaft 31, a transmission wheel 32, a pushing arm 33, a ball screw 34, and a motor 35. The transmission wheel 32, the ball screw 34, and the motor 35 are installed in the pushing housing 1. The pushing arm 33 is arranged outside the pushing housing 1. The motor 35 is drivingly connected to the ball screw 34. The translation end of the ball screw 34 is connected to the outer swing arm of the transmission wheel 32. The transmission wheel 32 is sleeved on the transmission shaft 31 and drives the transmission shaft 31 to rotate. The transmission shaft 31 extends outside the pushing housing 1 and is connected to the pushing arm 33 through a support arm connector 38 to drive the pushing arm 33 to swing. Sealing rings 36 are provided at the mating positions of both sides of the transmission shaft 31 and the pushing housing 1.

[0031] The oil pressure mechanism 7 includes a first pressure-bearing block 71, a second pressure-bearing block 72, an oil injection plug 73, a piston 74, and a pressure-bearing retaining ring 75. An oil passage 11 is provided inside the pushing housing 1. An oil injection passage 12 and two groups of piston passages 13 are provided on the pushing housing 1, with 4 in each group. The piston passages 13 are arranged equidistantly along the circumferential direction of the pushing housing 1. The oil injection passage 12 and the piston passages 13 are both communicated with the oil passage 11. The piston 74 is installed in the piston passage 13, and the oil injection plug 73 is installed in the oil injection passage 12. The first pressure-bearing block 71 and the second pressure-bearing block 72 are respectively located at the left and right ends of the oil passage 11. Pressure blocks are used at both ends of the oil injection passage 12 to isolate pressure and oil, ensuring that even if the seal at the pushing mechanism 3 is damaged and well fluid enters the oil injection passage 12, it will not affect the circuit part. The pressure-bearing retaining ring 75 is sleeved on the transmission shaft 31 and is located inside the sealing ring 36, and the pressure-bearing retaining ring 75 can better improve the pressure-bearing capacity.

[0032] The sealing structure at the pushing mechanism 3 has been improved. Instead of relying on the internal air and the sealing ring 36 alone to resist pressure, the internal oil injection method is adopted to ensure the balance of internal and external pressures at the sealing ring 36. When under an external pressure of 206 MPa, the piston 74 is pressed tightly, the internal oil pressure is balanced with the external pressure, and the pressures on both sides of the sealing ring 36 are the same, enabling it to withstand higher pressures.

[0033] As Figure 1 and Figure 2As shown, the pushing shell 1 is composed of two sections, the heat preservation mechanism 6 is arranged in the left section of the pushing shell 1, and the oil pressure mechanism 7 is arranged in the right section of the pushing shell 1. The left and right sections of the pushing shell 1 are connected by an intermediate connector 8. The two-section structure is adopted to facilitate the separate installation of the circuit board 2 and the pushing mechanism 3.

[0034] In addition, if Figure 5 As shown, in order to further improve the pressure resistance and sealing ability of the detector, intermediate rings 37 are sleeved on both sides of the transmission shaft 31, and sealing grooves are respectively provided on the inner and outer sides of the intermediate ring 37 in the circumferential direction. Pressure-bearing retaining rings 75 and sealing rings 36 are provided in the sealing grooves, which is equivalent to two sets of pressure-bearing retaining rings 75 and sealing rings 36 being provided on each side of the transmission shaft 31.

[0035] Installation process of this utility model:

[0036] (1) First, insert the non-wired heat absorber 64 into the thermos bottle 61, and then install the installed circuit part. The circuit part consists of a circuit skeleton 65, a wired heat absorber 63, and a PEEK material insulation 62.

[0037] (2) After the open end of the thermos bottle 61 is installed, the wire hole inside the heat insulator 62 is sealed with heat insulation cotton and 3140 glue to better reduce the heat conducted by air.

[0038] (3) The pushing shell 1 of the heat preservation mechanism part and the pushing shell 3 of the pushing mechanism part are connected in the form of an intermediate connector 8, which can be installed better and more conveniently.

[0039] (4) Add oil to the oil injection channel 12 to ensure that 2 of the 8 pistons 74 are at the bottom and the other 6 are at the full oil level. This can ensure that the oil volume is better compensated in the high temperature and high pressure well.

[0040] (5) Use joints to hold the two pressure blocks at both ends to ensure that the pressure blocks will not be pressed out when the downhole oil pressure and well pressure are balanced.

[0041] After installing the detector according to the above steps, pressure and high temperature tests are carried out to ensure that the instrument can work normally for 30 hours at 206MPa and 230℃ underground.

[0042] Since it is easy for those skilled in the art to think of it, any modification, equivalent substitution, improvement, etc. made within the concept and principle of the application should be included in the scope of the claims of this application.

Claims

1. An ARS downhole geophone with a pusher, comprising a pusher housing, a circuit board, a pusher mechanism, a lower housing, and a sensor skeleton. The pusher housing and the lower housing are connected end to end. The circuit board is arranged inside the pusher housing. The pusher mechanism is installed on the pusher housing. The sensor skeleton is arranged inside the lower housing. It is characterized in that, The described push housing further includes a heat preservation mechanism for heat insulation of the circuit board, and an oil pressure mechanism for enhancing compression resistance is provided at the sealing part of the push mechanism.

2. The ARS downhole geophone with a push support according to claim 1, wherein The described heat preservation mechanism includes a thermos flask, a heat insulation body, a wire-passing heat absorber, and a non-wire-passing heat absorber. The thermos flask is installed inside the push housing, the heat insulation body is installed at one end of the thermos flask, the wire-passing heat absorber is installed on one side of the heat insulation body, the non-wire-passing heat absorber is installed at the other end of the thermos flask, and the circuit board is installed between the wire-passing heat absorber and the non-wire-passing heat absorber through a wire frame.

3. The ARS downhole geophone with a push support according to claim 1, wherein The described push mechanism includes a transmission shaft, a transmission wheel, a push arm, a ball screw, and a motor. The transmission wheel, the ball screw, and the motor are installed in the push housing. The push arm is arranged outside the push housing. The motor is in transmission connection with the ball screw. The translation end of the ball screw is connected to the outer swing arm of the transmission wheel. The transmission wheel is sleeved on the transmission shaft and drives the transmission shaft to rotate. The transmission shaft extends outside the push housing and is connected to the push arm through a support arm connector to drive the push arm to swing. Sealing rings are provided at the matching parts of both sides of the transmission shaft and the push housing.

4. The ARS downhole geophone with a push support according to claim 3, characterized in that, The described oil pressure mechanism includes a first pressure-bearing block, a second pressure-bearing block, an oil injection plug, a piston, and a pressure-bearing retaining ring. An oil passage is arranged inside the push housing. An oil injection passage and a number of piston passages are provided on the push housing. The oil injection passage and the piston passages are both communicated with the oil passage. The piston is installed in the piston passage, and the oil injection plug is installed in the oil injection passage. The first pressure-bearing block and the second pressure-bearing block are respectively located at the left and right ends of the oil passage. The pressure-bearing retaining ring is sleeved on the transmission shaft and is located inside the sealing ring.

5. The ARS downhole geophone with a push support according to claim 1, characterized in that, The described push housing is composed of two left and right sections. The heat preservation mechanism is arranged in the left section of the push housing, and the oil pressure mechanism is arranged in the right section of the push housing. The two left and right sections of the push housing are connected through an intermediate connector.

6. The ARS downhole geophone with a push support according to claim 4, characterized in that, There are two groups of the piston passages, with 4 in each group, and the piston passages are arranged at equal intervals along the circumferential direction of the push housing.

7. The ARS downhole geophone with a push support according to claim 4, characterized in that, Intermediate rings are sleeved on both sides of the transmission shaft, and a pressure-bearing retaining ring and a sealing ring are respectively sleeved on the inner and outer sides of the intermediate ring.

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