Automatic high-temperature and high-pressure pressure-maintaining sampling device

Abstract

The invention discloses an automatic high-temperature and high-pressure pressure-maintaining sampling device, relates to the technical field of experimental sampling, aims to solve the problems of experimental interruption, large potential safety hazard, poor environmental adaptability and insufficient precision of deep sea research sampling, and mainly comprises a pressure-maintaining sampling platform, two or more pressure-maintaining samplers, a pressure-maintaining sampling control system and an experimental monitoring system. The whole process comprises the processes of parameter presetting, data acquisition and processing, sampling trigger judgment, abnormity early warning and storage and the like, the pressure-maintaining sampling control system receives an instruction of the experiment monitoring system and drives the pressure-maintaining sampler to complete sampling action, the pressure-maintaining sampler adopts a two-stage sealing structure, a pressure supplementing assembly and a double sample storage area are arranged in the pressure-maintaining sampler, the experiment does not need to be interrupted, and the sampling efficiency is improved. The device can realize automatic and accurate sampling in high-temperature, high-pressure and strong-corrosion environments, guarantees experimental continuity and data authenticity, improves sampling safety and efficiency, and is suitable for deep-sea deep-ground research, ultra-deep oil and gas production and other scenes.

Description

Technical Field

[0001] This invention relates to the field of experimental sampling technology, specifically to an automatic high-temperature and high-pressure holding sampling device. Background Technology

[0002] In deep-sea and deep-earth research (such as formation accumulation simulation experiments) and ultra-deep oil and gas production, it is necessary to conduct multiple sampling analyses on the experimental / production system to obtain key data such as material composition and reaction progress at different stages. However, the specific sampling process has the following problems:

[0003] 1. Traditional sampling requires pausing the experiment and disassembling the sampling interface, which leads to a sudden drop in system pressure (the fluctuation range is usually greater than 0.1MPa) and temperature changes, which damages the original experimental environment and results in a large deviation between the sampling data and the actual system state.

[0004] 2. In high temperature and high pressure scenarios (such as pressure ≥50MPa), manual disassembly of the sampling interface is prone to media leakage, posing safety hazards such as burns and explosions. In addition, researchers need to be on duty throughout the process, which is a lot of work.

[0005] 3. Conventional sampling devices mostly use a single sealing structure (such as rubber seals), which generally have a pressure resistance of less than 80MPa and are not resistant to acid and alkali corrosion. They cannot adapt to the strong corrosion and high pressure environment of the deep sea and deep earth, and have low sampling accuracy (volume error ≥0.001 ml), making it difficult to meet the needs of micro sample analysis.

[0006] To address the above problems, this invention proposes a solution. Summary of the Invention

[0007] The purpose of this invention is to provide an automatic high-temperature and high-pressure holding sampling device. Traditional solutions cannot simultaneously meet the requirements of "uninterrupted experiment, high pressure holding accuracy, corrosion resistance, and automation", which restricts the experimental accuracy of deep-sea and deep-earth research and the sampling safety of oil and gas production.

[0008] The objective of this invention can be achieved through the following technical solution: an automatic high-temperature and high-pressure holding sampling device, comprising a holding sampling platform, two or more holding samplers, a holding sampling control system and an experimental monitoring system, wherein the holding sampling platform and the holding samplers are connected by corrosion-resistant pipelines and valve assemblies;

[0009] The experimental monitoring system is used for parameter preset, real-time acquisition and processing of experimental data, sampling trigger judgment, abnormal warning and data archiving, and includes a multi-parameter integration unit, a hierarchical data feedback unit and a data analysis action unit.

[0010] The pressure-holding sampling control system is connected to the experimental monitoring system, receives the sampling trigger command and control signal from the experimental monitoring system, and drives the pressure-holding sampler to complete the sampling action.

[0011] The pressure-holding sampler adopts a two-stage sealing structure and is connected to the flow channel of the pressure-holding sampling platform through a corrosion-resistant pipeline.

[0012] Further configured, the multi-parameter integration unit has parameter setting, data acquisition, and data storage functions, including the following:

[0013] Parameter setting function: Includes four trigger conditions: pressure threshold, time interval, pH threshold, and resistivity threshold, and allows setting the allowable pressure fluctuation range, target sample volume, and data acquisition frequency.

[0014] Data acquisition function: Real-time pressure, temperature, pH value, resistivity and experimental duration are collected synchronously during the experiment. The data acquisition frequency can be dynamically adjusted according to the experimental stage. During the stable experimental stage, data is collected at the base frequency. Before and after sampling, the frequency is switched to ultra-high frequency. The collected data is preprocessed to obtain valid data. In terms of data storage, it is used to record raw data, valid data, set parameters, sampling records, abnormal logs, etc., and historical data.

[0015] Further configuration: In terms of parameter settings, the data analysis action unit is used to perform two actions: data processing and sampling trigger judgment.

[0016] Data processing action: Perform real-time calculations on the effective data transmitted by the multi-parameter integration unit to obtain the rate of change of parameters such as pressure change rate and temperature change rate, and generate the calculation formula of parameter deviation = |effective parameter - set parameter| / set parameter.

[0017] Sampling trigger judgment action: There are two trigger modes: single condition trigger and combined condition trigger. In the single condition trigger mode, the action is triggered when any one of the following conditions is met: the real-time effective pressure reaches the set pressure threshold, the experimental duration reaches the set time interval, the real-time effective pH value reaches the set pH value threshold, or the real-time effective resistivity reaches the set resistivity threshold.

[0018] Combined condition triggering action: The triggering logic is executed according to a preset customizable priority order.

[0019] Further configuration: In the hierarchical data feedback unit, data anomaly processing actions are performed. In the data anomaly processing actions, relevant signals are first encoded, transmitted and verified, feedback signals are received and transmitted synchronously, and experimental status, parameters and curves are displayed in real time. Key sampling information is marked and historical data backtracking is supported. Parameter and equipment anomalies are identified and processed hierarchically. The anomaly processing process is recorded and stored.

[0020] The system is further configured as follows: a sampling channel consisting of a sampling pump and multiple pressure-holding samplers is established through a pressure-holding sampling control system, with each pressure-holding sampler connected independently in parallel; the pressure-holding sampler is equipped with a pressure-compensating component and divided into two sample storage areas, with switching valves at both ends.

[0021] The data analysis action unit is further configured to: evaluate the stability of the experimental state by the rate of change and deviation of parameters, and to provide data support for the sampling process.

[0022] The system is further configured such that the signal transmission delay of the hierarchical data feedback unit does not exceed a preset threshold, and the curve update frequency is consistent with the data acquisition frequency.

[0023] The present invention has the following beneficial effects:

[0024] 1. Specifically targeting the pressure-holding sampling process in deep-sea research, it eliminates the need to pause the experiment or disassemble the sampling interface. Through the collaboration of the pressure-holding sampling control system and the experimental monitoring system, the pressure fluctuation of the pressure-holding sampling platform during the sampling process is controlled within the preset allowable range, and the temperature is kept stable, avoiding damage to the original experimental environment and ensuring that the sampling data is highly consistent with the actual system state. It is based on multiple pressure-holding samplers to form multiple non-interfering sampling channels, avoiding technical problems such as sudden changes in system temperature and pressure and large data deviations caused during the sampling process.

[0025] 2. The pressure-holding sampler adopts a two-stage sealing structure, combined with corrosion-resistant pipelines and valve components. Its pressure resistance far exceeds that of existing single-seal structure equipment. It can be adapted to high-pressure environments of ≥80MPa and strong acid and alkali corrosion conditions. Through pressure replenishment components, precise volume control and dynamic adjustment of data acquisition methods, it reduces sampling volume error and meets the high-precision requirements of trace sample analysis. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the automatic high-temperature and high-pressure holding sampling device proposed in this invention;

[0028] Figure 2 This is a schematic diagram of the sampling channel in the automatic high-temperature and high-pressure holding sampling device proposed in this invention;

[0029] Figure 3 This is a simplified structural diagram of the pressure-holding sampler in this invention. Detailed Implementation

[0030] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1: This example primarily addresses the sampling process in deep-sea and deep-earth research. Many experiments require simulating geological conditions, such as hydrocarbon accumulation under high temperature and pressure. These simulations necessitate multiple samplings during and after the experiment, and the experimental conditions cannot be altered. Sampling under high temperature and pressure is extremely difficult and dangerous. The following technical solution is proposed to address this issue:

[0032] Reference Figures 1-3 The automatic high-temperature and high-pressure holding sampling device in this embodiment includes a holding sampling platform, two or more holding samplers, a holding sampling control system and an experimental monitoring system. The holding sampling platform and the holding samplers are connected by corrosion-resistant pipelines and valve assemblies.

[0033] The experimental monitoring system is used for parameter preset, real-time acquisition and processing of experimental data, sampling trigger judgment, abnormal early warning and data archiving, and includes a multi-parameter integration unit, a hierarchical data feedback unit and a data analysis action unit.

[0034] The pressure-holding sampling control system is connected to the experimental monitoring system, receives the sampling trigger command and control signal from the experimental monitoring system, and drives the pressure-holding sampler to complete the sampling action.

[0035] The pressure-holding sampler adopts a two-stage sealing structure and is connected to the flow channel of the pressure-holding sampling platform through a corrosion-resistant pipeline. The automatic high-temperature and high-pressure pressure-holding sampling device is characterized by including a pressure-holding sampling platform, two or more pressure-holding samplers, a pressure-holding sampling control system and an experimental monitoring system. The pressure-holding sampling platform and the pressure-holding samplers are connected through corrosion-resistant pipelines and valve assemblies.

[0036] The experimental monitoring system is used for parameter preset, real-time acquisition and processing of experimental data, sampling trigger judgment, abnormal early warning and data archiving, and includes a multi-parameter integration unit, a hierarchical data feedback unit and a data analysis action unit.

[0037] The pressure-holding sampling control system is connected to the experimental monitoring system, receives the sampling trigger command and control signal from the experimental monitoring system, and drives the pressure-holding sampler to complete the sampling action.

[0038] The pressure-holding sampler adopts a two-stage sealing structure and is connected to the flow channel of the pressure-holding sampling platform through a corrosion-resistant pipeline. The pressure-holding sampling control system establishes a sampling channel consisting of a sampling pump and multiple pressure-holding samplers, with each pressure-holding sampler connected independently in parallel. The pressure-holding sampler is equipped with a pressure-compensating component and is divided into two sample storage areas, with switching valves at both ends.

[0039] Basic composition description: Figure 1 For example, the present invention is based on multiple pressure-holding samplers. When performing the pressure-holding sampling action, the sampling pump is used as the power component, and the switch valves at both ends of the pressure-holding sampler are opened to draw in a quantitative sample and store it in the flow channel of the pressure-holding sampler, which is used as a sample storage area. This part is the basic technical content of the present invention.

[0040] The key point of this invention is to perform sampling without affecting the experimental process. First, after the device is started, each component module completes a self-test. The pressure-holding sampling platform verifies the responsiveness of the temperature and pressure regulation function. The pressure-holding sampler detects the sealing performance of the two-stage sealing structure and the initial reset state of the pressure compensation component. The sensor group completes signal output calibration.

[0041] After the experimental monitoring system is started, the multi-parameter integration unit, data analysis action unit, and hierarchical data feedback unit establish a two-way communication path to complete the signal interoperability test between modules and the initial state reset, such as... Figure 2 As shown, the pressure-holding sampling control system and the experimental monitoring system complete signal pairing, confirm the idle status of each pressure-holding sampler, check the opening and closing flexibility of the sampling channel valves, ensure that there are no leaks in the connecting pipelines between the sampling pump and the pressure-holding sampler, and the pressure-holding sampling platform enters the standby mode, waiting to receive the temperature and pressure setting parameters transmitted by the multi-parameter integration unit, thus preparing for the construction of the experimental environment. This part is the experimental preparation stage, and the focus is on the following processes:

[0042] In the parameter preset and integration stage executed by the multi-parameter integration unit, the technical operator sets four types of sampling trigger conditions (pressure threshold P, time interval t, pH threshold PH, resistivity threshold R) through the multi-parameter integration unit's interactive interface. The operator can choose to trigger a single condition or a combination of conditions (such as "P meets the standard and t meets the standard" or "PH meets the standard or R meets the standard"). At the same time, the operator sets precision parameters such as the allowable range of pressure fluctuation ΔP, the target sample volume V, and the data acquisition frequency f. The multi-parameter integration unit verifies the above set parameters, generates a unique experiment number after confirming that there are no conflicts, classifies and stores the parameters, and synchronizes them to the data analysis action unit and the hierarchical data feedback unit as the benchmark for subsequent data comparison and trigger judgment.

[0043] After the experiment was started, the multi-parameter integration unit initiated the data acquisition and preprocessing process, synchronously acquiring real-time pressure P through the sensor array. 实 Real-time temperature T实 Real-time pH value 实 Real-time resistivity R 实 and experiment duration t 实 The sampling frequency f is dynamically adjusted according to the experimental stage, and the base frequency f is used during the stable experimental stage. 基 When parameters fluctuate, switch to high frequency f. 高 Upgraded to ultra-high frequency f before and after sampling 超 To ensure the integrity of data at critical nodes, and further processing is required to obtain valid data P after preprocessing. 效 T 效 pH 效 R 效 The data is synchronously transmitted to the data analysis action unit for analysis. All of the above belong to the basic action process.

[0044] Example 2: This example mainly supplements the data processing and analysis phase of the data analysis action unit.

[0045] First, the rate of parameter change is calculated: using continuously collected effective data, the rate of pressure change vP = ΔP is calculated. 效 / Δt(ΔP 效 The effective pressure difference between two consecutive data collections, where Δt is the data collection time interval, and the temperature change rate vT = ΔT 效 / Δt determines whether the parameter is in a stable state by the rate of change. When vP and vT are lower than the set threshold, the parameter is considered stable; otherwise, if they are higher than the threshold, it is marked as a fluctuating state.

[0046] The second step is to calculate the parameter deviation: based on the formula ΔP 偏 =|P 效 -P 设 | / P 设 (P) 设 (Preset pressure threshold), ΔT 偏 =|T 效 -T 设 | / T 设 (T) 设 (Preset temperature threshold), ΔPH 偏 =|PH 效 -PH 设 | / PH 设 (PH) 设 (Preset pH threshold), ΔR 偏 =|R 效 -R 设 | / R 设 (R) 设(For the preset resistivity threshold), calculate the deviation of each parameter from the set value, evaluate the fit between the experimental state and the preset target, and in this part, the data analysis action unit can simultaneously retrieve the historical experimental data stored in unit A, compare it with the current valid data to analyze the trend, and analyze P. 效 T 效 The changing patterns of parameters provide auxiliary basis for sampling trigger judgment;

[0047] Therefore, the sampling trigger judgment process is executed based on the above data processing procedure, specifically in two trigger modes: single condition and combined condition.

[0048] Single-condition trigger: When P 效 ≥P 设 t 实 ≥t 设 pH 效 ≥PH 设 R 效 ≥R 设 If any of the conditions is met, the trigger verification is initiated, and the condition must be met by three consecutive valid data collections to confirm the trigger is valid and generate a sampling start command; if the continuous verification requirement is not met, the process returns to the data collection stage and monitoring continues.

[0049] Combined condition triggering: The judgments are executed according to a preset, customizable priority order. For example, if "pressure threshold priority" is set, then P will be judged first. 效 Whether the standard is met, then judge other combinations of conditions (such as "P") 效 ≥P 设 And t 实 ≥t 设 “PH” 效 ≥PH 设 Or R 效 ≥R 设 After satisfying the combinational logic, it also undergoes three consecutive verifications. Once the verification is successful, a sampling start instruction is generated and transmitted to the C unit.

[0050] When performing the pressure holding sampling action, after receiving the instruction and verifying that it is correct, the pressure holding sampling control system selects one or more pressure holding samplers, starts the sampling channel, first adjusts the initial pressure inside the sampler through the pressure replenishment component inside the pressure holding sampler to match the system pressure of the pressure holding sampling platform, and then gradually opens the switching valves at both ends of the sampler to avoid sudden pressure changes.

[0051] During the sampling period, unit A used f 超 Frequency acquisition P 实 T 实 Data is synchronously transmitted to units B and C, and unit B calculates ΔP in real time. 偏 vP, if ΔP 偏If the sample exceeds the allowable range of ΔP, a control signal is immediately sent to the pressure-holding sampling control system through unit C to activate the pressure compensation module, maintain the temperature and pressure stability of the pressure-holding sampling platform, and monitor the sample volume in the sampler in real time. When the target volume V is reached, a sampling progress termination signal is generated.

[0052] Example 3: Combining Examples 1 and 2, this example describes the overall pressure-holding sampling control system and experimental monitoring system, focusing on two aspects: status display and anomaly handling. Specifically, it examines the location of the hierarchical data feedback unit.

[0053] The experimental status (standby / in experiment / sampling / abnormal warning) is displayed through a dedicated interface (screen), and real-time feedback is provided on P. 实 T 实 The numerical values ​​and change curves of parameters are displayed, and the curve update frequency is consistent with the data acquisition frequency. During the sampling process, key information such as triggering conditions, sampling duration, and sample volume progress are highlighted. Operators can trace back historical data for any time period and compare the details of parameter changes.

[0054] The focus will be on explaining the exception handling section, which specifically includes the following exceptions:

[0055] Parameter anomaly: when ΔP 偏 >ΔP 允 ΔT 偏 >ΔT 允 (ΔT) 允 (within the allowable range of temperature fluctuations), or vP and vT exceeding the preset rate threshold;

[0056] Equipment malfunctions: Such as no data feedback from sensors, interrupted signal transmission, leakage in the pressure-holding sampler seal, valve jamming, etc., are classified into three levels according to severity: Level 1 (minor malfunction), Level 2 (moderate malfunction), and Level 3 (severe malfunction). The following temporary emergency handling procedures are generated for these situations:

[0057] Level 1 Anomaly: Anomaly parameters are marked on the interface, and Unit C continuously monitors parameter changes without interrupting the experimental and sampling process;

[0058] Level 2 anomaly: Unit C immediately sends a pause sampling signal and simultaneously initiates a temperature and pressure regulation command through the pressure holding sampling control system until the parameters return to the allowable range, and then restarts sampling;

[0059] Level 3 Anomaly: Unit C sends an emergency stop signal, closes all valves, disconnects the sampling channel from external connections, triggers an alarm, and simultaneously records the P signal at the time of the fault. 效 T 效 All parameters and device status are recorded to form an exception handling log, which is then stored in Unit A.

[0060] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An automatic high-temperature and high-pressure holding sampling device, characterized in that, It includes a pressure-holding sampling platform, two or more pressure-holding samplers, a pressure-holding sampling control system, and an experimental monitoring system. The pressure-holding sampling platform and the pressure-holding samplers are connected through corrosion-resistant pipelines and valve assemblies. The experimental monitoring system is used for parameter preset, real-time acquisition and processing of experimental data, sampling trigger judgment, abnormal warning and data archiving, and includes a multi-parameter integration unit, a hierarchical data feedback unit and a data analysis action unit. The pressure-holding sampling control system is connected to the experimental monitoring system, receives the sampling trigger command and control signal from the experimental monitoring system, and drives the pressure-holding sampler to complete the sampling action. The pressure-holding sampler adopts a two-stage sealing structure and is connected to the flow channel of the pressure-holding sampling platform through a corrosion-resistant pipeline.

2. The automatic high-temperature and high-pressure holding sampling device according to claim 1, characterized in that, The multi-parameter integration unit has parameter setting, data acquisition, and data storage functions, including the following: Parameter setting function: Includes four trigger conditions: pressure threshold, time interval, pH threshold, and resistivity threshold, and allows setting the allowable pressure fluctuation range, target sample volume, and data acquisition frequency. Data acquisition function: Real-time pressure, temperature, pH value, resistivity and experimental duration are collected synchronously during the experiment. The data acquisition frequency can be dynamically adjusted according to the experimental stage. During the stable experimental stage, data is collected at the base frequency. Before and after sampling, the frequency is switched to ultra-high frequency. The collected data is preprocessed to obtain valid data. In terms of data storage, it is used to record raw data, valid data, set parameters, sampling records, abnormal logs, etc., and historical data.

3. The automatic high-temperature and high-pressure holding sampling device according to claim 2, characterized in that, Regarding parameter settings, the data analysis action unit is used to perform two actions: data processing and sampling trigger judgment. Data processing action: Perform real-time calculations on the effective data transmitted by the multi-parameter integration unit to obtain the rate of change of parameters such as pressure change rate and temperature change rate, and generate the calculation formula of parameter deviation = |effective parameter - set parameter| / set parameter. Sampling trigger judgment action: There are two trigger modes: single condition trigger and combined condition trigger. In the single condition trigger mode, the action is triggered when any one of the following conditions is met: the real-time effective pressure reaches the set pressure threshold, the experimental duration reaches the set time interval, the real-time effective pH value reaches the set pH value threshold, or the real-time effective resistivity reaches the set resistivity threshold. Combined condition triggering action: The triggering logic is executed according to a preset customizable priority order.

4. The automatic high-temperature and high-pressure holding sampling device according to claim 3, characterized in that, In the hierarchical data feedback unit, data anomaly processing actions are performed. The data anomaly processing actions first encode, transmit and verify the relevant signals, receive and transmit feedback signals synchronously, and display the experimental status, parameters and curves in real time. Key sampling information is marked and historical data backtracking is supported. Parameter and equipment anomalies are identified and processed hierarchically. The anomaly processing process is recorded and stored.

5. The automatic high-temperature and high-pressure holding sampling device according to claim 4, characterized in that, A sampling channel consisting of a sampling pump and multiple pressure-holding samplers is established through a pressure-holding sampling control system. Each pressure-holding sampler is connected independently in parallel. The pressure-holding sampler is equipped with a pressure-compensating component and divided into two sample storage areas, with switching valves at both ends.

6. The automatic high-temperature and high-pressure holding sampling device according to claim 5, characterized in that, The data analysis action unit assesses the stability of the experimental state by measuring the rate of change and deviation of parameters, and is used for data support in the sampling process.

7. The automatic high-temperature and high-pressure holding sampling device according to claim 6, characterized in that, The signal transmission delay of the hierarchical data feedback unit does not exceed a preset threshold, and the curve update frequency is consistent with the data acquisition frequency.

Images