Modular integrated electric valve controlled sample barrel pup joint

Abstract

The utility model provides a module integrated formula electric valve control sampling bucket pup joint, including base body, install with the upper joint and lower joint of adjacent pup joint in the both ends of base body, install sampling device on the base body, and the sampling device includes motor groove and sample groove through sample channel intercommunication, install sampling bucket in the sample groove, install drive portion in the motor groove, and drive portion controls the on -off of sampling channel through motor drive screw rod switch device. The utility model's sampling bucket pup joint can be connected together with other measuring pup joint through the upper joint and lower joint as an independent component, and four independent sampling can be completed in one time downhole, sampling efficiency is improved greatly, through each independent motor controls a sampling bucket respectively, controls the sampling process of each self freely, can control the sampling channel on -off of each sampling bucket at any time through screw rod switch device, accurately controls the process of sample collection, can obtain the sample of specified stratum, improves the measurement precision of sample.

Description

Technical Field

[0001] This utility model relates to the field of petroleum exploration, and in particular to an electric sampling barrel section that integrates multiple sampling barrels in a module and whose sampling process is controlled by an independent motor. Background Technology

[0002] In the oil industry, it is necessary to understand the distribution of oil in the formation when drilling a new well. This is often done by using cables or drill pipes to lower a sampling bucket to the appropriate location downhole, collecting the liquid from the well wall through the sampling bucket, and then bringing it back to the surface for analysis.

[0003] Current sampling bucket sections are fully functional, including a hydraulic unit for supplying hydraulic oil, a sample extraction device, and a drive unit for controlling the movement of the sampling bucket. However, due to the large number of its own components, there is insufficient space for mounting, necessitating an extension of the entire sampling bucket section's upper section. This is detrimental to navigating bends in the wellbore. Furthermore, the numerous components prevent it from being integrated with other measurement sections, forcing it to be deployed alone. In addition, current sampling bucket sections have a limited number of sampling buckets, allowing only one to three sample collections per deployment, resulting in low efficiency. Utility Model Content

[0004] The purpose of this invention is to provide an electric sampling barrel section that integrates multiple sampling barrels in a module and whose sampling process is controlled by an independent motor.

[0005] Specifically, this utility model provides an integrated electric sampling barrel section, including a base, with an upper connector and a lower connector connected to adjacent sections installed at both ends of the base, and a sampling device installed on the base. The sampling device includes a motor slot and a sample slot connected through a sample channel, with a sampling barrel installed in the sample slot and a drive unit installed in the motor slot. The drive unit controls the opening and closing of the sampling channel through a motor-driven lead screw switch device.

[0006] In one embodiment of this utility model, the motor slot and the sample slot are arranged adjacent to each other and distributed along the axial direction, and four sampling devices are provided and symmetrically arranged around the centerline of the substrate.

[0007] In one embodiment of this utility model, the lead screw switch device includes a lead screw connected to the motor, a lead screw nut sleeved on the lead screw, a locking pin connected to the lead screw nut, a limiting sleeve sleeved outside the lead screw nut, a positioning block provided axially on the outer surface of the lead screw nut, and an axial sliding groove for locking the positioning block provided at the position corresponding to the limiting sleeve and the positioning block.

[0008] In one embodiment of this utility model, one end of the lead screw nut is connected to a connector. A hanging plate with a central opening is provided at the opening of the connector away from the lead screw nut. A receiving cavity with the same diameter as the locking pin is provided at the end of the connector near the lead screw nut. The diameter of the receiving cavity is larger than the diameter of the opening on the connector. A groove connecting the connector and the receiving cavity is provided on the side of the connector. A hanging ring with the same diameter as the opening on the connector is provided at the end of the locking pin near the connector.

[0009] In one embodiment of this utility model, a valve seat is installed on the substrate, and a valve seat channel is provided on the valve seat. The two ends of the valve seat channel are a sample inlet and a sample outlet, respectively. The valve seat channel is connected to the sample channel on the substrate, and the connection port is a circular hole that corresponds to the movement direction of the locking pin. The end of the locking rod is conical in shape, and the diameter of the circular hole is smaller than the diameter of the end of the locking rod. When the end of the locking rod contacts the circular hole, a line seal is formed.

[0010] In one embodiment of this utility model, the motor drive mechanism further includes a hollow sealed outer tube. The motor and lead screw device are installed inside the sealed outer tube. A rolling bearing is installed and clamped at one end of the lead screw near the motor. One end of the limiting sleeve is sealed and inserted into the valve seat, and the other end is sealed and inserted into the motor. The sealing cavity between the limiting sleeve and the locking pin communicates the sample channel and the valve seat channel.

[0011] In one embodiment of this utility model, a circuit control unit is installed on the base, and a cable channel is provided on the axis of the base. The circuit control unit is connected to each of the motor drive mechanisms through the cable channel.

[0012] In one embodiment of this utility model, the sampling bucket includes a sampling shell, and inside the sampling shell are sequentially installed a head that seals one end of the sampling shell, a mud piston, a nitrogen piston, and a manual valve seat that seals the other end of the sampling shell. A manual valve is installed on the manual valve seat. A mud chamber is formed between the mud piston and the head, a nitrogen chamber is formed between the mud piston and the nitrogen piston, and a sample chamber is formed between the nitrogen piston and the manual valve seat. A stirring ball is placed in the sample chamber. A sample branch pipe communicating with the sample channel and the sample chamber is provided on the manual valve seat, and a manual valve for controlling the opening and closing of the sample branch pipe is provided.

[0013] In one embodiment of this utility model, the end cap is fixed to one end of the sample groove by a U-shaped clip with a threaded hole, the manual valve seat is fixed to the other end of the sample groove by a screw, and the sample branch tube is connected to the sample channel on the substrate by a sealing connector.

[0014] In one embodiment of this utility model, the upper connector and the lower connector respectively include a transfer connector and two fixing clamps formed by two semi-rings. The transfer connector has a cable channel for connecting cables and three oil passages for conveying hydraulic oil. A multi-core plug is installed in the cable channel, and a self-control connector for controlling the on / off state is installed in the oil passage.

[0015] The sampling bucket section in this invention, as an independent component, can be connected in series with other measuring sections via upper and lower connectors for simultaneous operation in the well. Once powered, it can independently complete sampling without the need for other measuring sections. A single well run can complete four independent sampling operations, significantly improving sampling efficiency. Each sampling bucket is controlled by an independent motor, allowing for free control of its sampling process. A lead screw switch device allows for real-time control of the sampling channels of each bucket, precisely controlling the sample collection process and enabling the acquisition of samples from designated formations, thus improving sample measurement accuracy. The sampling bucket section is designed for easy disassembly and maintenance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the sampling bucket section of this utility model;

[0017] Figure 2 yes Figure 1 The left view;

[0018] Figure 3 yes Figure 1 AA section view;

[0019] Figure 4 yes Figure 1 BB cross-sectional view;

[0020] Figure 5 This is a schematic diagram of the lead screw and nut structure;

[0021] Figure 6 This is a schematic diagram of the automatic control device. Detailed Implementation

[0022] The structure and operation of this solution will be further described below through specific embodiments and accompanying drawings. In the following embodiments, the description is based on the orientation shown in the accompanying drawings when facing the screen. In the following embodiments, only this utility model will be described.

[0023] like Figure 1 , 2As shown in Figure 3, this embodiment discloses a modular integrated electric valve controlled sampling barrel section, including a cylindrical base 1. An upper connector 2 and a lower connector 3, which connect to adjacent measuring sections, are respectively installed at both ends of the base 1. Cable channels 21 and oil channels 22 are installed on the upper connector 2 and lower connector 3, allowing for the simultaneous transmission of electrical signals and hydraulic oil to the connected measuring section. A sampling device 4 is installed on the base 1. The sampling device 4 includes a motor slot 41 and a sample slot 42 connected by a sampling channel 43. A sampling barrel 5 is installed in the sample slot 42, and a drive unit 6 is installed in the motor slot 41. The drive unit 6 controls the opening and closing of the sampling channel 43 by driving a lead screw switch device 62 via a motor 61.

[0024] The sample container 5 and the drive unit 6 are movably installed in the sample tank 42 and the motor tank 41. The underground sample enters the sampling container 5 through the sample channel 43. The sample channel 43 is controlled by the motor 61 driving the lead screw switch device 62. The sample channel 43 can be opened at a specified stratum depth to deliver the sample to the sampling container 5, ensuring the accuracy of the sampling.

[0025] In this embodiment, the sampling bucket section, as an independent component, can be connected in series with other measuring sections via upper and lower connectors for simultaneous operation in the well. Once powered, it can independently complete sampling without the need for other measuring sections. A single well run can complete four independent samplings, significantly improving sampling efficiency. Each sampling bucket is controlled by an independent motor, allowing for free control of its sampling process. A lead screw switch device allows for real-time control of the sampling channels of each sampling bucket, precisely controlling the sample collection process and obtaining samples from designated formations, thus improving sample measurement accuracy. The sampling bucket section is removably installed, facilitating disassembly and maintenance.

[0026] like Figure 4 As shown, the motor slot 41 and sample slot 42 are arranged adjacent to each other on the substrate 1 and distributed along the axial direction. In this embodiment, a maximum of four sampling devices 4 can be provided, and the four sampling devices 4 are symmetrically arranged around the axis of the substrate 1. The four sampling devices 4 have the same structure. The following description is based on the structure of one sampling device 4.

[0027] The lead screw switch device 62 in this embodiment includes a lead screw 621 connected to the drive shaft of a motor 61, a lead screw nut 622 sleeved on the lead screw 621, a locking pin 623 connected to the lead screw nut 622, and a limiting sleeve 624 sleeved outside the lead screw nut 622. A positioning block 625 is axially arranged on the outer surface of the lead screw nut 622, and an axial sliding groove 626 is provided at the position corresponding to the positioning block 625 on the limiting sleeve 624 to lock the positioning block 625. When the motor 61 is working, it drives the lead screw 621 to rotate. Simultaneously, the lead screw nut 622 moves linearly along the lead screw 621 under the constraint of the positioning block 625 and the sliding groove 626, thus pushing the locking pin 623 to move linearly. The front end of the pin 623 contacts the inlet on the sample channel 43, sealing the sample channel 43. When the sample channel 43 is connected, the motor 61 reverses to cause the lead screw nut 622 to drive the locking pin 623 to retract, thereby opening the entrance of the sample channel 43 and allowing the sample to flow in the sample channel 43.

[0028] To facilitate the control of the locking pin 623 by the lead screw nut 622, a connector 627 is connected to one end of the lead screw nut 622. A hanging plate 6271 with a central hole is provided at the opening of the connector 627 away from the lead screw nut 622. A receiving cavity 6272 with the same diameter as the locking pin 623 is provided at the end of the connector 627 close to the lead screw nut 622. The diameter of the receiving cavity 6272 is larger than the diameter of the opening on the hanging plate 6271. A groove 6273 connecting the hanging plate 6271 and the receiving cavity 6272 is provided on the side of the connector 627. A hanging ring 6231 with the same diameter as the opening on the hanging plate 6271 is provided at the end of the locking pin 623 close to the connector 627. During installation, the hanging ring 6231 of the locking pin 623 is inserted into the hanging plate 6271 through the groove 6273, while the end of the locking pin 623 is inserted into the receiving cavity 6272. At this time, the locking pin 623 is fixed axially by the insertion tube 627. To prevent the locking pin 623 from moving radially, a locking ring 628 is installed on the locking pin 623.

[0029] like Figure 5As shown, to facilitate pipe connection, a valve seat 7 is installed in the motor slot at one end of the base 1 near the locking pin 623. A valve seat channel 71 for sample flow is provided on the valve seat 7. The two ends of the valve seat channel 71 are the sample inlet 72 and the sample outlet 73, respectively. The sample inlet 72 and the sample outlet 73 can be connected to external pipes. For example, the sample inlet 72 is connected to an extraction device for extracting formation liquid, and the sample outlet 73 is connected to the sample channel 43 on the base 1 through a pipe. The valve seat channel 71 is connected to the sample channel 43 on the base 1, and the connection port is a circular hole 74 corresponding to the movement direction of the locking pin 623. The end of the locking pin 623 is conical 6232. The diameter of the circular hole 74 is smaller than the end diameter of the locking pin 623. When the conical 6232 of the locking pin 623 contacts the circular hole 74, a line seal is formed. This structure can prevent the locking pin 623 from being blocked by particles in the sample when it contacts the circular hole 74, thus preventing the phenomenon of incomplete sealing.

[0030] To prevent external mud from entering the drive unit 6, the drive unit 6 also includes a hollow sealed outer tube 64. The motor 61 and the lead screw switch device 62 are installed inside the sealed outer tube 64. One end of the limiting sleeve 624 is sealed and inserted into the valve seat 7, and the other end is sealed and inserted into the motor 61. The end of the lead screw 621 near the motor 61 is fitted with a rolling bearing 629, which does not affect the rotation of the lead screw 621 and can prevent the lead screw 621 from radially deviating. The sealing cavity 622 between the limiting sleeve 624 and the locking pin 623 is part of the sample channel 43. That is, after the sample enters the sealing cavity 622 through the sample channel 43, it enters the circular hole 74 on the valve seat channel 71 to form a loop. When the locking pin 623 closes the circular hole 74, the flow of the sample channel 43 can be cut off.

[0031] To facilitate the transmission of electrical signals, a circuit control unit 8 is installed on the base 1, and a cable channel 81 is provided on the axis of the base 1. The circuit control unit 8 is connected to each motor 61 by a cable through the cable channel 81 and a cable plug 82.

[0032] The sampling bucket 5 in this embodiment includes a sampling shell 51. Inside the sampling shell 51, a head 52 that closes one end of the sampling shell 51, a mud piston 53, a nitrogen piston 54, and a manual valve seat 55 that closes the other end of the sampling shell 51 are installed in sequence. A mud chamber 531 is formed between the mud piston 53 and the head 52. A mud channel connecting the outside to the mud chamber 531 is provided at the head 52. A nitrogen chamber 541 is formed between the mud piston 53 and the nitrogen piston 54. A sample chamber 56 is formed between the nitrogen piston 54 and the manual valve seat 55. A stirring ball 57 is placed in the sample chamber 56. A sample branch pipe 551 that communicates with the sample channel 43 and the sample chamber 56 is provided on the manual valve seat 55, and a manual valve 552 that controls the opening and closing of the sample branch pipe 551 is provided.

[0033] The sampling container 5 is installed in a movable manner. The end cap 52 is fixed to one end of the sample tank 42 by a U-shaped clip 521 with a threaded hole, and the manual valve seat 55 is fixed to the other end of the sample tank 42 by a screw. After installation, the manual valve seat 55 connects the internal sample branch tube 551 to the sample channel 43 on the substrate 1 through the sealing connector 58.

[0034] In this embodiment, when the sampling bucket 5 is not in operation, the nitrogen in the nitrogen chamber 541 will squeeze the mud piston 53 and the nitrogen piston 54 to both ends respectively, thereby ensuring that the downhole mud will not enter the sampling bucket 5. As the sampling bucket 5 descends, the downhole mud enters the mud chamber 531 under pressure through the mud channel on the sampling bucket 5, and then pushes the mud piston 53 to squeeze the nitrogen, thereby compressing the nitrogen chamber 541, while also ensuring that the nitrogen piston 54 seals the sample branch pipe 551. During sampling, the sample enters the sample branch pipe 551 through the sample channel 43. Under high pressure, the entering sample will push the nitrogen piston 54 to move towards the mud piston 53, thereby squeezing the mud in the mud chamber 53 out of the sampling bucket 5. When the sample enters the sample chamber 56, the stirring ball 57 moves with the sample and can push the internal particles to avoid the sample chamber 56 from being blocked. When the sampling is completed, the mud piston 53 is also completely squeezed to the end cap 52 by the nitrogen. After all sampling barrels 5 have completed their sampling, the sample channel 43 can be closed using the locking pin 623. When the multi-barrel sampling section is pulled to the surface, the sample branch pipe 551 is closed using the manual valve 552, and then the sampling barrels 5 are removed. The manual valve 552 prevents the sample inside the sampling barrels 5 from flowing out when they are removed.

[0035] In one embodiment of this utility model, the upper connector 2 and the lower connector 3 have the same structure. The structure of the upper connector 2 will be described below. It includes a transfer connector 23 and two fixing clamps 24 formed by two semi-rings. The transfer connector 23 has four channels arranged axially inside. One of them is a cable channel 21. A multi-core plug 211 for connecting cables is installed in the cable channel 21 to provide electrical signal output for itself and the connected measuring sub. The other three are oil passages 22, which provide atmospheric pressure hydraulic oil and high pressure hydraulic oil for itself and the connected measuring sub. A self-control connector 9 that switches the liquid on and off according to the pressure change is installed in each oil passage 22.

[0036] like Figure 6As shown, the self-controlled connector 9 includes a hollow mounting tube 91, a sliding sleeve 92 and a locking ring 93 located at both ends of the opening of the mounting tube 91, a guide rod 94 positioned inside the mounting tube 91 by the sliding sleeve 92 and the locking ring 93, a spring 95 fitted on the outer surface of the guide rod 94 to press the sliding sleeve 92 against the channel opening, the guide rod 94 being hollow inside with a guide hole 96 in the middle of the rod body and an overflow hole 97 communicating with the inside of the mounting tube 91 at the outer end, and the locking ring 93 being screwed on by threads. Inside the inner port of the mounting tube 91, the insertion end of the guide rod 94 is blocked by the locking ring 93, preventing the guide rod 94 from sliding out from the outer port of the mounting tube 91. The sliding sleeve 92 is located at the outer port of the mounting tube 91, and the inner and outer surfaces of the sliding sleeve 92 are in sealing contact with the inner surface of the mounting tube 91 and the outer surface of the guide rod 94. The overflow hole 97 at the outer end of the guide rod 94 is blocked by the sliding sleeve 92. Under the compression of the spring 95, the sliding sleeve 92 can prevent the internal liquid from flowing out of the channel from the mounting tube 91 or the guide rod 94.

[0037] During connection, the sliding sleeve 92 of the upper connector 2 contacts and presses against the sliding sleeve 92 inside the connector of the connected measuring sub, simultaneously pushing their respective springs 95 back. This exposes the overflow holes 97 at the ends of the guide rods 94 of both connectors, allowing hydraulic oil to flow through the middle guide hole 96 and then into the mounting tube 91 of the other connector via the end channel. The multi-pin plug 211 is inserted into the multi-pin socket on the connector of the connected measuring sub to achieve cable connection between them.

[0038] Therefore, those skilled in the art should recognize that although many exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. A module integrated electric valve control sampling barrel pup joint, comprising a base body, an upper joint and a lower joint connected with adjacent short sections are installed at both ends of the base body, and a sampling device is installed on the base body, characterized in that, The sampling device includes a motor slot and a sample slot connected by a sample channel. A sampling bucket is installed in the sample slot, and a drive unit is installed in the motor slot. The drive unit controls the opening and closing of the sampling channel through a motor-driven lead screw switch device. The motor slots and sample slots are arranged adjacent to each other and distributed along the axial direction. Four sampling devices are provided and symmetrically arranged around the center line of the substrate. The lead screw switch device includes a lead screw connected to the motor, a lead screw nut sleeved on the lead screw, a locking pin connected to the lead screw nut, a limiting sleeve sleeved outside the lead screw nut, a positioning block provided axially on the outer surface of the lead screw nut, and an axial sliding groove for locking the positioning block provided at the position corresponding to the positioning block on the limiting sleeve. One end of the lead screw nut is connected to a connector. A hanging plate with a central opening is provided at the opening of the connector away from the lead screw nut. A receiving cavity with the same diameter as the locking pin is provided at the end of the connector near the lead screw nut. The diameter of the receiving cavity is larger than the diameter of the opening on the connector. A groove connecting the connector and the receiving cavity is provided on the side of the connector. A hanging ring with the same diameter as the opening on the connector is provided at the end of the locking pin near the connector.

2. The modular integrated electric valve controlled sampling bucket section according to claim 1, characterized in that, A valve seat is installed on the substrate, and a valve seat channel is provided on the valve seat. The two ends of the valve seat channel are the sample inlet and the sample outlet, respectively. The valve seat channel is connected to the sample channel on the substrate, and the connection port is a circular hole that corresponds to the movement direction of the locking pin. The end of the locking pin is conical in shape, and the diameter of the circular hole is smaller than the diameter of the end of the locking pin. When the end of the locking pin contacts the circular hole, a line seal is formed.

3. The modular integrated electric valve controlled sampling bucket section according to claim 2, characterized in that, The drive unit also includes a hollow sealed outer tube. The motor and lead screw are installed inside the sealed outer tube. A rolling bearing is installed and clamped at one end of the lead screw near the motor. One end of the limiting sleeve is sealed and inserted into the valve seat, and the other end is sealed and inserted into the motor. The sealing cavity between the limiting sleeve and the locking pin communicates with the sample channel and the valve seat channel.

4. The modular integrated electric valve controlled sampling bucket section according to claim 1, characterized in that, A circuit control unit is mounted on the base, and a cable channel is provided on the axis of the base. The circuit control unit is connected to each of the drive units through the cable channel.

5. The modular integrated electric valve controlled sampling barrel section according to claim 1, characterized in that, The sampling container includes a sampling shell, inside which are sequentially installed a head that seals one end of the sampling shell, a mud piston, a nitrogen piston, and a manual valve seat that seals the other end of the sampling shell. A manual valve is installed on the manual valve seat. A mud chamber is formed between the mud piston and the head, a nitrogen chamber is formed between the mud piston and the nitrogen piston, and a sample chamber is formed between the nitrogen piston and the manual valve seat. A stirring ball is placed in the sample chamber. A sample branch pipe communicating with the sample channel and the sample chamber is provided on the manual valve seat, and a manual valve for controlling the opening and closing of the sample branch pipe is provided.

6. The modular integrated electric valve controlled sampling barrel section according to claim 5, characterized in that, The end cap is fixed to one end of the sample slot by a U-shaped clip with a threaded hole, and the manual valve seat is fixed to the other end of the sample slot by a screw. The sample branch tube is connected to the sample channel on the substrate by a sealing connector.

7. The modular integrated electric valve controlled sampling barrel section according to claim 1, characterized in that, The upper and lower connectors each include a transfer connector and two fixing clamps formed by two semi-rings. The transfer connector has a cable channel for connecting cables and three oil passages for conveying hydraulic oil. A multi-core plug is installed in the cable channel, and a self-control connector for controlling the on / off state is installed in the oil passage.

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