CN112879001A - Automatic rock debris sampling device and automatic rock debris sampling method based on suction mode - Google Patents
Automatic rock debris sampling device and automatic rock debris sampling method based on suction mode Download PDFInfo
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- 238000005070 sampling Methods 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000011435 rock Substances 0.000 title claims description 74
- 238000005520 cutting process Methods 0.000 claims abstract description 32
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 238000000926 separation method Methods 0.000 claims abstract description 28
- 238000005553 drilling Methods 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000004140 cleaning Methods 0.000 claims abstract description 8
- 238000012423 maintenance Methods 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 9
- 239000004576 sand Substances 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 230000003750 conditioning effect Effects 0.000 claims description 3
- 238000013500 data storage Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 abstract description 7
- 230000015572 biosynthetic process Effects 0.000 abstract description 4
- 239000002002 slurry Substances 0.000 description 41
- 239000012634 fragment Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000005086 pumping Methods 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
- E21B21/065—Separating solids from drilling fluids
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/02—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells by mechanically taking samples of the soil
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
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- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- General Health & Medical Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
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- Biochemistry (AREA)
- Soil Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
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- Earth Drilling (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
本发明公开了一种基于抽吸模式的岩屑自动取样装置及取样方法，该装置包括泥浆取样泵的泵入口连接三通阀，三通阀的另外两个接口中，一个接口通过取样管线与高架槽相连接，另一个接口通过取样管线与循环清洗水箱相连接，泥浆取样泵的泵出口与固液分离装置的入口之间通过泥浆管线相连接，在固液分离装置上安装振动电机，倾斜面的上部为岩屑出口，岩屑出口的底部为岩屑存储机箱的入口，倾斜面的下部为泥浆出口，该泥浆出口连接三通阀。本发明所公开基于抽吸模式的岩屑自动取样装置，通过泵抽吸的方式从振动筛前端获取钻井液，并从中分离出岩屑样本，可以有效解决人工取样方式中由于岩屑经过振动筛混叠所造成的岩屑地层代表性变差的问题。
The invention discloses an automatic sampling device for cuttings based on a suction mode and a sampling method. The device comprises a three-way valve connected to a pump inlet of a mud sampling pump. Among the other two interfaces of the three-way valve, one interface is connected with a sampling pipeline through a sampling pipeline. The elevated tank is connected, the other interface is connected to the circulating cleaning water tank through the sampling pipeline, the pump outlet of the mud sampling pump and the inlet of the solid-liquid separation device are connected through the mud pipeline, and a vibration motor is installed on the solid-liquid separation device to tilt The upper part of the face is the cuttings outlet, the bottom of the cuttings outlet is the inlet of the cuttings storage box, and the lower part of the inclined face is the mud outlet, and the mud outlet is connected to the three-way valve. The automatic sampling device for cuttings based on the suction mode disclosed in the present invention obtains drilling fluid from the front end of the vibrating screen by means of pump suction, and separates cuttings samples from it, which can effectively solve the problem of the manual sampling method because the cuttings pass through the vibrating screen. The problem of poor representation of cuttings formation caused by aliasing.
Description
Technical Field
The invention belongs to the field of petroleum engineering exploration, and particularly relates to a suction mode-based automatic rock debris sampling device and a rock debris automatic sampling method in the field.
Background
In the process of oil exploration, geological analysis is carried out on rock debris returned from a well bottom, which is an important method for finding an oil-gas layer, at present, a method for manually obtaining the rock debris is still adopted at home and abroad, sampling accuracy and timeliness cannot be guaranteed, the requirement of rapid drilling cannot be met, an analysis result obtained by a wrong geological sample cannot play a role in guiding oil exploration, but can generate serious misleading, and the development of an oil exploration technology is restricted.
Since the fishing object is conveyed to the surface from the bottom of the well by the mud, in order to balance the formation pressure, reduce friction and clean the well hole, various additives are added into the mud to improve the performance of the mud, and the mud has the characteristics of viscosity and easy drying. The equipment needs to be crossed with the slurry, so the influence caused by the slurry needs to be overcome, and more rigorous requirements are provided for the reliability and the stability of key links of the equipment. The structures of the headframes of different well teams are different, the installation space is limited, and the system not only needs to adapt to different headframe structures, but also cannot influence the normal drilling operation; due to the fact that the drilling speed is increased, the period from drilling to well completion operation is usually 1-2 months, the longest period is 6 months, equipment needs to be frequently disassembled and transported, and therefore strict requirements are placed on the volume and the weight of the equipment.
Rock debris sampling device among the prior art mainly has following problem:
(1) the system does not form closed-loop control, lacks the detection of the mud flow rate and the weight of the fished rock debris, and cannot adjust the rock debris fishing process according to the actual working condition of a drilling site; (2) the sampling and the backflow of the slurry are realized by using a pumping mode, the pump is difficult to keep long-term stable operation in a slurry environment with high viscosity, easy drying and more particulate matters, and the backflow pump and the pipeline in the scheme are in a vertical relation, so that the particulate matters are easy to block the pump, the fault is caused, the maintenance cost is increased, and the operation efficiency is influenced; (3) the rock debris can only be stored in 1 box at most, the automation degree is low, the method is not different from manual fishing, and the manpower is not really liberated; (4) the volume is large, the weight is overweight, and in the drilling site that the space is restricted, it is difficult to find suitable installation position.
Disclosure of Invention
The invention aims to solve the technical problem of providing a rock debris automatic sampling device and a rock debris automatic sampling method based on a suction mode.
The invention adopts the following technical scheme:
an automatic rock debris sampling device based on a suction mode is improved in that: the pump entry of mud sample pump connects the three-way valve, in two other interfaces of three-way valve, an interface is connected with overhead groove through the sample pipeline, and install the sample filter head between this sample pipeline front end and overhead groove, another interface is connected with circulation washing water tank through the sample pipeline, be connected through the mud pipeline between the pump export of mud sample pump and solid-liquid separation equipment's the entry, install vibrating motor on solid-liquid separation equipment, solid-liquid separation equipment's bottom is the inclined plane, the upper portion of inclined plane is the detritus export, the bottom of detritus export is the entry of detritus storage machine case, the lower part of inclined plane is the mud export, this mud export connection three-way valve, in two other interfaces of three-way valve, an interface is connected with circulation washing water tank through the mud pipeline, another interface is connected with the mud jar through the mud pipeline.
Further, the solid-liquid separation device is a vibrating screen; the vibration motor is a double vibration motor.
Further, a rock debris box is placed below the inlet of the rock debris storage chassis.
Further, still include the control collection box of controlling means work, control collection box is including gathering control panel, five mouthful two solenoid valves, two mouthful two solenoid valves and vibrating motor controller, and two-way function pneumatic device relies on five mouthful two solenoid valves to carry out the gas circuit and switches, and one-way function pneumatic device relies on two mouthful two solenoid valves to carry out the gas circuit and switches.
Furthermore, the acquisition control board comprises a signal acquisition circuit, a motor driving circuit, a peripheral control circuit, a state detection circuit, a data storage circuit and a wireless communication circuit.
Furthermore, the signal acquisition circuit comprises a signal conditioning circuit, an analog switch, a 24-bit ADC, a differential amplifier and a V/I conversion circuit.
Further, the motor driving circuit includes a two-phase stepping motor driving chip THB6064H, a peripheral bridge driving circuit and a main control chip.
Furthermore, the peripheral control circuit comprises an isolation protection circuit, an NMOS drive circuit and an electromagnetic valve control circuit.
Further, the state detection circuit detects the conveyor belt position through hall type proximity switch, detects storage box position through inductance type proximity switch, detects detritus box position through mechanical contact switch.
The automatic rock debris sampling method is suitable for the device, and the improvement is that the method comprises the following steps:
step 1: the upper computer control software acquires logging engineering parameters including well depth, rock debris late arrival time, drilling time, pump speed and outlet flow through the wits;
step 2: the late arrival time of the nth meter of rock debris is reached, and the speed of a mud sampling pump and the vibration speed of a vibration motor are set according to the drilling time, the pump speed of a mud pump and the outlet flow;
and step 3: monitoring the weight of the fished rock debris in real time, if the weight of the rock debris does not reach a target value, continuing to wait, and if the weight of the rock debris reaches the target value to be fished, closing a slurry sampling pump and a vibration motor;
and 4, step 4: transmitting the current rock fragment box to a storage position, and detecting whether the next empty rock fragment box is at a sand receiving position;
and 5: if the (n + 1) th rock debris is delayed, repeating the step 2;
step 6: if the (n + 1) th rock debris late time does not arrive, monitoring whether the pump stopping time exceeds the preset time or not, repeatedly executing the step 5 if the pump stopping time does not exceed the preset time, and starting the system to perform self-maintenance if the pump stopping time exceeds the preset time;
and 7: starting a system for self-maintenance, and circularly cleaning the slurry sampling pump and the solid-liquid separation device by using clear water;
and 8: and (5) judging whether a command of stopping bailing of the upper computer is received, if so, stopping bailing, and if not, repeatedly executing the step 5.
The invention has the beneficial effects that:
according to the automatic rock debris sampling device based on the suction mode, the drilling fluid is obtained from the front end of the vibrating screen in a pumping mode, and the rock debris sample is separated from the drilling fluid, so that the problem of poor rock debris stratum representativeness caused by aliasing of rock debris through the vibrating screen in an artificial sampling mode can be effectively solved. Can support 10 boxes of rock debris storage space and reduce the workload of manual sampling. All modules of the device are miniaturized and modularized, so that the device is suitable for harsh installation environments of well sites and is convenient to frequently disassemble and transport. The rock debris collecting device can replace an operation mode of manually collecting rock debris on a drilling site, improves the representativeness, timeliness and accuracy of rock debris strata, liberates manual work from operation with high labor intensity, provides an accurate analysis sample for geological analysis on the drilling site, and provides powerful support for timely and accurate identification of an oil-gas reservoir.
The automatic rock debris sampling method disclosed by the invention can monitor the flow rate of slurry and the weight of rock debris in real time, and can adjust the speed of a slurry sampling pump and the solid-liquid separation speed in real time according to logging engineering parameters, thereby realizing closed-loop control of a sampling process. The self-maintenance function of the slurry sampling pump and the solid-liquid separation device is added, the influence of slurry on the stability of the device can be effectively reduced, and the device can be ensured to operate stably for a long time.
Drawings
Fig. 1 is a schematic structural view of an automatic rock debris sampling device disclosed in embodiment 1 of the present invention;
FIG. 2 is a block diagram showing the components of a control collection box in the automatic rock debris sampling device disclosed in embodiment 1 of the present invention;
fig. 3 is a block diagram of a circuit configuration of an acquisition control board in the automatic rock debris sampling apparatus disclosed in embodiment 1 of the present invention;
fig. 4 is a schematic flow chart of an automatic rock debris sampling method disclosed in embodiment 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The slurry sampling pump and the three-way valve in the embodiment are driven by an air source, and can also be realized by using an electric driving device. The data transmission may be wireless.
Embodiment 1, this embodiment discloses an automatic sampling device of detritus based on suction mode, install in well site mud overhead groove below, the shale shaker front end, acquire more representative geology sample through the pumping mode, behind solid-liquid separation equipment, mud liquid need not external drive, rely on gravity backward flow to in the mud jar, the solid detritus is then preserved in detritus storage device, control system can carry out self-adaptation adjustment to sampling speed and solid-liquid separation speed according to drilling engineering parameter, the real-time sample volume of detritus, the structure is adopted the modularization, miniaturized design, and have self-maintenance function, operational reliability has been promoted, stability, and to the well site adaptability to different well sites.
As shown in fig. 1, a pump inlet 6 of a slurry sampling pump 4 is connected with a three-way valve 8, one of the other two interfaces of the three-way valve is connected with an elevated tank 1 through a sampling pipeline 3, and a sampling filter head 2 is installed between the front end of the sampling pipeline and the elevated tank, so that the sampling filter head can filter out formation falling blocks (false rock debris) exceeding 1cm in the elevated tank, and a real formation sample is ensured to be obtained. The other interface is connected with a circulating cleaning water tank 22 through a sampling pipeline 19, an outlet 5 of a slurry sampling pump is connected with an inlet 9 of a solid-liquid separation device 10 through a slurry pipeline 7, a vibration motor 11 is mounted on the solid-liquid separation device, the vibration motor provides an excitation force to realize the separation of solid and liquid in the slurry, and the bottom 16 of the solid-liquid separation device is an inclined plane so that the liquid slurry after solid-liquid separation can quickly flow to a slurry outlet 15. The upper part of the inclined plane is a rock debris outlet 13, the bottom of the rock debris outlet is an inlet 24 of a rock debris storage case 14, the lower part of the inclined plane is a slurry outlet 15, the slurry outlet is connected with a three-way valve 17, one of the other two interfaces of the three-way valve is connected with a circulating cleaning water tank 22 through a slurry pipeline 18, and the other interface is connected with a slurry tank 23 through a slurry pipeline 20.
In this embodiment, the solid-liquid separation device is a vibrating screen; the vibration motor is a double vibration motor. A rock chip box is placed under the inlet of the rock chip storage case.
The rock debris sample generated by the broken stratum of the drill bit in the drilling process is carried to the ground elevated tank from the well bottom through the slurry, and then is pumped into the solid-liquid separation device through the slurry sampling pump, the vibration motor arranged on the solid-liquid separation device provides the excitation force, so that the separation of solid and liquid in the slurry is realized, the separated liquid slurry does not need any driving force, and directly flows into the slurry tank through the slurry outlet along the inclined plane at the bottom of the solid-liquid separation device under the action of the self gravity for recycling, and the slurry loss is avoided. The solid rock debris falls into the rock debris box through the rock debris outlet and the rock debris storage case inlet for storage.
The three-way valve 8 has two connection states, and is in a normal sand bailing state when being connected with the slurry sampling pump inlet 6 and the sampling pipeline 3, and is in a system self-maintenance state when being connected with the slurry sampling pump inlet 6 and the sampling pipeline 19.
The three-way valve 17 has two connection states, namely a normal rock debris sampling state when connecting the slurry outlet 15 with the slurry pipeline 20, and a system self-maintenance state when connecting the slurry outlet 15 with the slurry pipeline 18.
The water tank 22 is filled with clear water with a fixed volume, and when the rock debris sampling process is finished and enters a self-maintenance state, the clear water is used for cleaning the slurry sampling pump and the solid-liquid separation device, so that the device can stably operate for a long time.
As shown in fig. 2, the pneumatic device also comprises a control collection box 21 for controlling the work of the device, the control collection box comprises a collection control board 25, a five-port two-position electromagnetic valve 26, a two-port two-position electromagnetic valve 27 and a vibration motor controller 28, the two-way function pneumatic device depends on the five-port two-position electromagnetic valve to perform air path switching, and the one-way function pneumatic device depends on the two-port two-position electromagnetic valve to perform air path switching.
As shown in fig. 3, the acquisition control board includes a signal acquisition circuit, a motor driving circuit, a peripheral control circuit, a state detection circuit, a data storage circuit, and a wireless communication circuit.
The signal acquisition circuit comprises a signal conditioning circuit, an analog switch, a 24-bit ADC, a differential amplifier and a V/I conversion circuit, and is used for acquiring the weight of rock debris, the pressure of an air source, the flow of the air source and the flow rate of drilling fluid. A pressure bridge signal output by the rock debris weight and drilling fluid flow velocity sensor is conditioned into a 4-20 mA current signal through a differential amplifier and a V/I conversion circuit and then output, the anti-electromagnetic interference capacity of long-distance signal transmission is improved, and meanwhile, the influence of line loss on the detection precision of the sensor is reduced.
The motor driving circuit comprises a two-phase stepping motor driving chip THB6064H, a peripheral bridge type driving circuit and a main control chip. The two-phase stepping motor driving chip THB6064H is used as a core and matched with a peripheral bridge type driving circuit to realize the driving of the stepping motor, and the rotating speed of the motor is adjusted in real time by PWM waves output by a main control chip.
The peripheral control circuit comprises an isolation protection circuit, an NMOS drive circuit and an electromagnetic valve control circuit. The peripheral control circuit is mainly used for controlling the working states of the three-way valve, the push rod, the pneumatic pump and the motor to realize a sampling control process.
The state detection circuit receives the influence of installation condition and discernment object material, need select suitable detection mode to different objects, detects the conveyer belt position through hall type proximity switch, detects storage box position through inductance type proximity switch, detects detritus box position through mechanical contact switch.
The embodiment also discloses an automatic rock debris sampling method, which is applicable to the device and comprises the following steps as shown in fig. 4:
step 1: the upper computer control software acquires logging engineering parameters including well depth, rock debris late arrival time, drilling time, pump speed and outlet flow through the wits;
step 2: the late arrival time of the nth meter of rock debris is reached, and the speed of a mud sampling pump and the vibration speed of a vibration motor are set according to information such as drilling time, the pump speed of a mud pump, outlet flow and the like;
and step 3: monitoring the weight of the fished rock debris in real time, if the weight of the rock debris does not reach a target value, continuing to wait, and if the weight of the rock debris reaches the target value to be fished, closing a slurry sampling pump and a vibration motor;
and 4, step 4: transmitting the current rock fragment box to a storage position, and detecting whether the next empty rock fragment box is at a sand receiving position;
and 5: if the (n + 1) th rock debris is delayed, repeating the step 2;
step 6: if the (n + 1) th rock debris late time does not arrive, monitoring whether the pump stopping time exceeds the preset time x minutes or not, repeatedly executing the step 5 if not, and starting the system to perform self-maintenance if the pump stopping time exceeds the preset time x minutes;
and 7: starting the system for self-maintenance, connecting a three-way valve 8 with an inlet 6 of a slurry sampling pump and a sampling pipeline 19, connecting a three-way valve 17 with a slurry outlet 15 and a slurry pipeline 18, and circularly cleaning the slurry sampling pump and the solid-liquid separation device by using clean water in a water tank 22;
and 8: and (5) judging whether a command of stopping bailing of the upper computer is received, if so, stopping bailing, and if not, repeatedly executing the step 5.
In the present invention, the drill cuttings refer to rock particles ground or crushed by a drill bit while drilling. The circulation flushing liquid is taken out of the ground from the well, which is the data basis for knowing the rock stratum property, displaying oil gas and compiling a geological profile. The rock debris is used for logging of drilling geology, and the logging is called rock debris logging and is commonly called sand sampling. The delay time of the rock debris, also called the lag time of the rock debris, refers to the time when the drilling fluid carries the drill bit to break the rock debris and directly returns to the surface sampling position at a constant speed along the annular gap formed by the well wall and the drilling tool from the position where the drilling fluid is located.
Claims (10)
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113309479A (en) * | 2021-07-12 | 2021-08-27 | 中国地质科学院勘探技术研究所 | Efficient coring drilling device and method for shallow sea reef limestone |
| CN113818824A (en) * | 2021-09-16 | 2021-12-21 | 中煤科工集团重庆研究院有限公司 | Pneumatic movable mining drilling flushing fluid recycling device |
| CN115596436A (en) * | 2021-07-08 | 2023-01-13 | 中石化石油工程技术服务有限公司（Cn） | A hydrodynamic sand carrying device |
| WO2024119986A1 (en) * | 2022-12-08 | 2024-06-13 | 中国石油天然气集团有限公司 | Drilling rock debris sampling method, apparatus, system, and device |
| CN119124732A (en) * | 2024-10-09 | 2024-12-13 | 山东省地矿工程集团有限公司 | A water source detection sampling instrument for engineering geological survey |
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