CN112012685B - Horizontal well in-situ monitoring fidelity continuous coring tool - Google Patents
Horizontal well in-situ monitoring fidelity continuous coring tool Download PDFInfo
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- CN112012685B CN112012685B CN202011080831.6A CN202011080831A CN112012685B CN 112012685 B CN112012685 B CN 112012685B CN 202011080831 A CN202011080831 A CN 202011080831A CN 112012685 B CN112012685 B CN 112012685B
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- 238000011065 in-situ storage Methods 0.000 title claims abstract description 28
- 238000012544 monitoring process Methods 0.000 title claims abstract description 12
- 238000003860 storage Methods 0.000 claims abstract description 31
- 230000007246 mechanism Effects 0.000 claims abstract description 30
- 239000000725 suspension Substances 0.000 claims description 64
- 239000007788 liquid Substances 0.000 claims description 47
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 35
- 238000006243 chemical reaction Methods 0.000 claims description 34
- 238000005553 drilling Methods 0.000 claims description 34
- 239000007789 gas Substances 0.000 claims description 29
- 239000012530 fluid Substances 0.000 claims description 28
- 229910052757 nitrogen Inorganic materials 0.000 claims description 17
- 238000002347 injection Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- 238000005259 measurement Methods 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 230000000712 assembly Effects 0.000 claims description 9
- 238000000429 assembly Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 229910021389 graphene Inorganic materials 0.000 claims description 7
- 238000009530 blood pressure measurement Methods 0.000 claims description 6
- 238000009529 body temperature measurement Methods 0.000 claims description 6
- 239000011435 rock Substances 0.000 claims description 6
- 230000003139 buffering effect Effects 0.000 claims description 5
- 210000000078 claw Anatomy 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 4
- 239000011229 interlayer Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 abstract description 2
- 238000011161 development Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000012295 chemical reaction liquid Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
- E21B25/10—Formed core retaining or severing means
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/14—Valve arrangements for boreholes or wells in wells operated by movement of tools, e.g. sleeve valves operated by pistons or wire line tools
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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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to an in-situ monitoring and fidelity continuous coring tool for a horizontal well, which comprises a safety assembly, a hexagonal differential reverse lifting mechanism, a hanging rotary assembly, an in-situ fidelity intelligent control assembly, a storage inner cylinder assembly, an outer cylinder and a coring bit, wherein the safety assembly, an upper outer centralizer, the outer cylinder, a lower outer centralizer and the coring bit are fixedly connected in sequence to form the outer cylinder assembly, the hexagonal differential reverse lifting mechanism, the hanging rotary assembly, the in-situ intelligent control assembly and the storage inner cylinder assembly are fixedly connected in sequence to form the inner cylinder assembly, the inner cylinder assembly is arranged in the outer cylinder assembly, and the inner cylinder assembly is connected to the outer cylinder assembly through a hanging rotary mechanism. After coring, putting a soluble ball into the core so that the hexagonal differential mechanism is subjected to pressure holding and reverse lifting to complete core cutting operation; the piston rod of the pneumatic cylinder drives the slide block valve rod to move so as to realize the opening and closing of the ball valve, and the soluble ball reacts and dissolves to complete the multi-point continuous coring operation; and recording and feedback-adjusting the consistency of the inner cylinder environment and the in-situ environment through the in-situ fidelity intelligent control assembly.
Description
The technical field is as follows:
the invention relates to the field of petroleum and natural gas exploration and development tools, in particular to a horizontal well in-situ monitoring fidelity continuous coring tool.
Secondly, background art:
with the increasing exhaustion of shallow oil and gas resources, the development of oil and gas resources in China is comprehensively advanced to deep oil and gas reservoirs, and deep mining becomes a normal state in the development of oil and gas resources, and currently, the deep mining becomes an important field for realizing yield succession. The core is the truest basis in the oil and gas exploration and development process, the drilling coring technology is the most direct mode for obtaining the core, the accuracy of results such as the oil and gas content, mechanical parameters, pore parameters and the like of the core is indirectly influenced due to the change of occurrence conditions in the coring and drilling processes of the core, and the reservoir evaluation and development design of oil and gas resources are influenced due to the distortion of measured data. Most of the existing coring tools can only drill a single section of core, and are not suitable for continuous coring of multiple well sections of the same well. Therefore, there is an urgent need to develop new coring tools to solve the above technical bottlenecks and problems.
Thirdly, the invention content:
the invention aims to provide a horizontal well in-situ monitoring fidelity continuous coring tool which is used for solving the problem that most of the existing coring tools can only drill a single section of core and are not suitable for continuous coring of multiple well sections of the same well.
The technical scheme adopted by the invention for solving the technical problems is as follows: the horizontal well in-situ monitoring fidelity continuous coring tool comprises a safety assembly, a hexagonal differential reverse lifting mechanism, a hanging rotary assembly, an in-situ fidelity intelligent control assembly, a storage inner cylinder assembly, an outer cylinder and a coring bit, wherein the safety assembly, an upper outer centralizer, the outer cylinder, a lower outer centralizer and the coring bit are sequentially and fixedly connected to form the outer cylinder assembly;
the hexagonal differential reverse lifting mechanism comprises a differential piston shaft, a differential piston sleeve, a differential spring and a buffer mechanism, wherein the outer wall of the upper end of the differential piston shaft is connected with a safety male joint in a threaded manner, a ball seat is arranged on the inner wall of the bottom end of the differential piston shaft, the differential piston sleeve is sleeved on the outer side of the piston shaft, the differential spring is arranged outside the differential piston shaft between the differential piston sleeve and the safety male joint, the outer step of the bottom end of the differential piston shaft is a regular hexagon and is in axial sliding sealing fit with the regular hexagon inner wall of the differential piston sleeve, an annular space is formed between the differential piston shaft and the differential piston sleeve, the differential piston sleeve can move up and down along the differential piston shaft, the differential piston shaft is provided with a central flow passage, the side wall of the lower end of the differential piston shaft is provided with a pressure relief hole which can be communicated with the annular space between the differential piston shaft and the differential piston sleeve, the side wall of the differential piston sleeve is provided with a flow dividing passage, and the lower end of the differential piston sleeve is connected with a conversion joint in a threaded manner, the lower end of the adapter is in threaded connection with a buffer mechanism; the buffer mechanism consists of a buffer connecting shaft, a buffer tightening cap, a buffer lower joint and a buffer spring, wherein the outer wall of the upper end of the buffer connecting shaft is in threaded connection with a conversion joint, the buffer tightening cap is in threaded connection with the buffer lower joint, the buffer connecting shaft is arranged in the buffer tightening cap and the buffer lower joint, the buffer spring is sleeved at the lower end of the buffer connecting shaft, a buffer lower joint drilling fluid channel and a pin hole are circumferentially arranged at the bottom end of the buffer lower joint, and the buffer lower joint drilling fluid channel is communicated with an annular gap between the outer cylinder assembly and the inner cylinder assembly through a suspension rotating assembly;
the in-situ fidelity intelligent control assembly comprises a gas and liquid storage chamber, a measurement feedback instrument cabin, a temperature and pressure measurement system, a temperature and pressure feedback system and a pneumatic cylinder control system, wherein the gas and liquid storage chamber comprises a high-pressure nitrogen chamber, a reaction basic liquid chamber and a reaction trigger liquid chamber; the pneumatic cylinder control system consists of three pneumatic cylinders and corresponding rigid connecting rods;
the storage inner cylinder assembly comprises three coring inner cylinders, three ball valve assemblies, a rock core claw assembly, a rock limiter, a heat preservation cylinder and an inner cylinder centralizer, wherein gas injection holes are formed in the outer walls of the three coring inner cylinders respectively and are connected with a high-pressure nitrogen chamber through a transmission pipeline, graphene coatings and insulating layers are covered on the surfaces of the outer walls of the three coring inner cylinders, the three coring cylinders are connected through the ball valve assemblies in sequence, and the upper part of the first coring inner cylinder is in threaded connection with a measurement feedback short section; the outer wall of the third coring inner barrel is additionally provided with a reaction base liquid and a reaction trigger liquid injection port, the bottom of the third coring inner barrel is provided with an interlayer, and the inner wall of the third coring inner barrel is circumferentially provided with a plurality of injection ports; the core gripper assembly comprises a clamp seat and a clamp, the clamp seat is in threaded connection between a third coring barrel and a third ball valve, a high-pressure nitrogen injection opening is formed in the outer wall of the clamp seat, and a contact pair is formed between the inclined surface of the outer wall of the clamp and the inclined surface of the inner wall of the clamp seat; a sliding block valve rod of the ball valve assembly is connected with a pneumatic cylinder through a rigid connecting rod, the sliding block valve rod is installed inside a valve body sliding channel groove, a pneumatic cylinder piston rod drives the sliding block valve rod to move up and down in the valve body sliding channel groove, the sliding block valve rod is connected with a valve body surface connecting shaft through a steel wire rope, and the valve body rotates through a bolt shaft on the valve body.
The suspension rotating assembly in the scheme comprises a suspension joint, a suspension mandrel, a bearing tightening cap, a bearing group, a bearing seat and a plug, wherein a suspension joint drilling fluid flow passage formed in the upper end of the suspension joint in the circumferential direction is communicated with a buffering lower joint drilling fluid flow passage; the bearing assembly is arranged in the bearing box, a thrust bearing is arranged between the suspension mandrel and the suspension joint, the lower end of the thrust bearing is propped against the step surface of the suspension mandrel, and the thrust bearing and the bearing seat form axial limit matching; a radial bearing is further arranged between the suspension mandrel and the suspension joint, a spacing part is arranged between the radial bearing and the thrust bearing, and an axial steel wire retainer ring for positioning the radial bearing is arranged between the radial bearing and the bearing tightening cap.
The safety assembly comprises a safety male connector and a safety female connector, the outer wall of the lower end of the safety male connector is in threaded connection with the safety female connector, the inner wall of the lower end of the safety male connector is in threaded connection with a differential piston shaft, and the outer wall of the lower end of the safety female connector is connected with an outer centralizer.
The invention has the following beneficial effects:
1. the trafficability characteristic of the horizontal well with the small curvature radius is realized by adopting the flexible outer cylinder; the pneumatic cylinder system is rigidly connected with a valve rod of a ball valve slide block to finish the repeated opening and closing of the ball valve, so that the aim of multipoint continuous coring is fulfilled; the in-situ fidelity intelligent control assembly monitors the temperature and pressure change conditions of the inner barrel environment and the external occurrence environment in real time to perform feedback control, independently adjusts the storage environments of all rock cores to finish the fidelity purpose, and realizes intelligent automatic control by adopting the serial-parallel connection cooperation of a plurality of groups of electromagnetic valves; the drilling fluid circulates through the reserved passage to achieve the purpose of isolating the drilling fluid; by adopting the hexagonal differential reverse lifting mechanism, after core drilling is finished, the cutting core is reversely lifted through the pressure build-up of the drilling fluid, so that the tool is suitable for highly deviated wells or horizontal wells and has low requirements on well deviation; the core centralizer is provided with an inner centralizer and an outer centralizer, so that the coaxiality and the centralization of the inner cylinder and the outer cylinder are guaranteed, and the core drilling is facilitated.
2. The invention allows the core to be drilled through the horizontal well with small curvature radius, monitors the occurrence environment in situ in the coring process, realizes core fidelity through the sealing and forming and the intelligent feedback control system, and simultaneously can realize multi-point continuous coring so as to more accurately and efficiently calculate the residual oil reserves and guide the exploration and exploitation scheme of the oil and gas field.
3. After the coring tool is put into the vertical section, the coring tool enters the horizontal section through the flexible outer cylinder through a small curvature radius, and the circulating drilling fluid cleans the bottom of the well. After core drilling to a target position, a soluble pressure-holding ball is put in to enable the internal pressure of the hexagonal differential reverse lifting mechanism to be held, a differential piston sleeve is pushed to move upwards to drive an inner barrel assembly to lift reversely, a core is cut by a hoop-type core claw, reaction liquid is synchronously coated and sealed and formed in the process that the core enters a third core inner barrel, a pneumatic cylinder system controls a third ball valve to be closed, gas is injected to push the core to enter the first core inner barrel and close a first ball valve to complete sealing, a temperature and pressure measuring system measures corresponding external occurrence environment and inner barrel environment, pressure and temperature data are recorded and transmitted to a feedback system to be intelligently controlled to adjust pressure and temperature, and the consistency of the environment is kept. The third ball valve is controlled by the pneumatic cylinder system to be repeatedly opened and closed to take multiple sections of cores, the steps are repeated to complete multi-point continuous coring, and after the coring is completed, independent real-time adjustment of all the cores is achieved through series-parallel connection matching of multiple groups of electromagnetic valves contained in the in-situ fidelity intelligent control assembly.
Description of the drawings
FIG. 1 is a schematic structural view of a horizontal well in-situ monitoring fidelity continuous coring tool of the present invention.
Fig. 2 is an enlarged structural schematic diagram of the hexagonal differential anti-lifting mechanism.
Fig. 3 is an enlarged structural schematic diagram of the suspension rotation mechanism.
FIG. 4 is an enlarged schematic view of an in-situ fidelity intelligent control assembly.
Fig. 5 is an enlarged structural schematic diagram of a storage inner cylinder assembly mechanism.
FIG. 6 is an enlarged schematic view of a slider ball valve assembly.
Fig. 7 is a top view of fig. 6.
Fig. 8 is a schematic three-dimensional structure diagram of the gas and liquid storage chamber.
Fig. 9 is a top view of fig. 8.
In the figure: the device comprises a safety assembly 1, a hexagonal differential reverse lifting mechanism 2, a suspension rotating assembly 3, an in-situ fidelity intelligent control assembly 4, a storage inner cylinder assembly 5, a lower outer centralizer 6, an inner cylinder centralizer 7, an outer cylinder 8 and a coring bit 9;
2-1 differential piston shaft, 2-2 differential piston sleeve, 2-3 differential spring, 2-4 buffer mechanism, 2-5 ball seat, 2-6 soluble ball, 2-7 annular space, 2-8 pressure relief hole, 2-9 shunt channel, 2-10 adapter, 2-11 buffer connecting shaft, 2-12 buffer tightening cap, 2-13 buffer lower joint, 2-14 buffer lower joint drilling fluid flow channel and 2-15 pin hole;
3-1 suspension joint, 3-2 suspension mandrel, 3-3 bearing tightening cap, 3-4 bearing group, 3-5 bearing seat, 3-6 plug, 3-7 pin hole, 3-8 key groove, 3-9 suspension pin, 3-10 sliding screw, 3-11 pin plug, 3-12 pin retaining sleeve, 3-13 shunt hole, 3-14 thrust bearing and 3-15 radial bearing;
4-1 gas and liquid storage chamber, 4-2 measurement feedback instrument chamber, 4-3 temperature and pressure measurement system, 4-4 temperature and pressure feedback system, 4-5 pneumatic cylinder control system, 4-6 transmission pipeline, 4-7 graphene coating, 4-8 cable, 4-9 difference short section, 4-10 pneumatic cylinder, 4-11 rigid connecting rod, 4-12 high-pressure nitrogen chamber, 4-13 reaction basic liquid chamber, 4-14 reaction trigger liquid chamber, 4-15 gas and liquid separation piston, 4-16 electromagnetic valve;
5-1 of a coring inner cylinder, 5-2 of a ball valve assembly, 5-3 of a core claw assembly, 5-4 of a rock limiter, 5-5 of a heat preservation cylinder, 5-6 of a gas injection hole, 5-7 of a liquid injection port, 5-8 of a clamp seat, 5-9 of a clamp and 5-10 of a high-pressure nitrogen injection port;
5-21 ball valve cabin, 5-22 sealing piston cabin, 5-23 valve body, 5-24 slide block valve rod, 5-25 bolt shaft, 5-26 steel wire rope, 5-27 ball valve bearing and 5-28 slideway.
Fifth, detailed description of the invention
The invention is further described below with reference to the accompanying drawings:
as shown in fig. 1, the in-situ monitoring and fidelity continuous coring tool for the horizontal well comprises a safety assembly 1, a hexagonal differential reverse lifting mechanism 2, a suspended rotating assembly 3, an in-situ fidelity intelligent control assembly 4, a storage inner cylinder assembly 5, a lower outer centralizer 6, an inner cylinder centralizer 7, an outer cylinder 8 and a coring drill bit 9. The safety assembly 1, the outer barrel 8, the lower outer centralizer 6 and the coring bit 9 are sequentially and fixedly connected to form an outer barrel assembly, the hexagonal differential reverse lifting mechanism 2, the suspension rotating assembly 3, the in-situ intelligent control assembly 4 and the storage inner barrel assembly 5 are sequentially and fixedly connected to form an inner barrel assembly, a safety male joint connected with a drill rod is arranged at the upper part of the safety assembly 1, the inner barrel assembly is arranged inside the outer barrel assembly and connected to the outer barrel assembly through the suspension rotating mechanism, and the inner barrel centralizer 7 is arranged in an annular gap between the inner barrel assembly and the outer barrel assembly.
Referring to the attached fig. 2, the hexagonal differential anti-lifting mechanism 2 includes a differential piston shaft 2-1, a differential piston sleeve 2-2, a differential spring 2-3, and a buffer mechanism 2-4, wherein: the outer wall of the upper end of a differential piston shaft 2-1 is connected with a safe male joint in a threaded manner, the inner wall of the bottom end of the differential piston shaft 2-1 is provided with a ball seat 2-5, the inner diameter of the ball seat is matched with a soluble ball 2-6, a differential piston sleeve 2-2 is sleeved outside the piston shaft, the outer step of the bottom end of the differential piston shaft 2-1 is a regular hexagon and is in axial sliding sealing fit with the regular hexagon inner wall of the differential piston sleeve 2-2, an annular space 2-7 is formed between the differential piston shaft 2-1 and the differential piston sleeve 2-2, the differential piston sleeve 2-2 can move up and down along the differential piston shaft 2-1, the side wall of the lower end of the differential piston shaft 2-1 is provided with a pressure relief hole 2-8 which can be communicated with the annular space 2-7 between the differential piston shaft 2-1 and the differential piston sleeve 2-2, the side wall of the differential piston sleeve 2-2 is provided with a shunt channel 2-9, the lower end of a differential piston sleeve 2-2 is in threaded connection with a conversion joint 2-10, the lower end of the conversion joint 2-10 is in threaded connection with a buffer mechanism 2-4, the buffer mechanism 2-4 is composed of a buffer connecting shaft 2-11, a buffer tightening cap 2-12, a buffer lower joint 2-13 and a buffer spring, the outer wall of the upper end of the buffer connecting shaft 2-11 is in threaded connection with the conversion joint 2-10, the buffer tightening cap 2-12 is in threaded connection with the buffer lower joint 2-13, the buffer connecting shaft 2-11 is arranged in the buffer tightening cap 2-12 and the buffer lower joint 2-13, the spring is sleeved at the lower end of the buffer connecting shaft 2-11, and the bottom end of the buffer lower joint 2-13 is circumferentially provided with a buffer lower joint drilling fluid flow channel 2-14 and a pin hole 2-15.
Referring to fig. 3, the suspension rotation assembly 3 includes a suspension joint 3-1, a suspension spindle 3-2, a bearing cap 3-3, a bearing set 3-4, a bearing seat 3-5, and a plug 3-6, wherein: a suspension joint drilling fluid flow passage is arranged at the upper end of the suspension joint 3-1 in the circumferential direction and is communicated with a buffering lower joint drilling fluid flow passage, a pin hole 3-7 and a key groove 3-8 are arranged at the upper end of the suspension joint 3-1 in the circumferential direction, the suspension joint is hung on a buffering lower joint 2-13 through a suspension pin 3-9 in a matching manner, a safety female joint is connected through a sliding screw 3-10, one end of the suspension pin 3-9 is locked and fixed by a pin plug 3-11, the other end of the suspension pin abuts against the outer wall of a pin retaining sleeve 3-12, a drilling fluid hole communicated with the suspension joint drilling fluid flow passage and a central cavity of a suspension mandrel is arranged at the upper part of the pin retaining sleeve 3-12 in the circumferential direction, a diversion hole 3-13 is arranged at the bottom of the suspension mandrel 3, the plug 3-6 is plugged at the lower end of the suspension mandrel 3-2, a closed space formed by the suspension joint 3-1, the bearing tightening cap 3-3, the suspension mandrel 3-2 and the bearing seat 3-5 is called as a bearing box, the bearing group 3-4 is arranged in the bearing box, a thrust bearing 3-14 is arranged between the suspension mandrel 3-2 and the suspension joint 3-1, the lower end of the thrust bearing 3-14 is propped against the step surface of the suspension mandrel, the radial bearing is axially limited and matched with the bearing seat 3-5, a radial bearing 3-15 is arranged between the suspension mandrel 3-2 and the suspension joint 3-1, a spacing part is arranged between the radial bearing 3-15 and the thrust bearing 3-14, and an axial steel wire check ring for positioning the radial bearing is arranged between the radial bearing 3-15 and the bearing locking cap 3-3.
Referring to the attached figure 4, the in-situ fidelity intelligent control assembly 4 comprises a gas and liquid storage chamber 4-1, a measurement feedback instrument cabin 4-2, a temperature and pressure measurement system 4-3, a temperature and pressure feedback system 4-4, a pneumatic cylinder control system 4-5, a transmission pipeline 4-6, a graphene coating 4-7 and a cable 4-8, wherein: the gas and liquid storage chamber 4-1 comprises a high-pressure nitrogen chamber 4-12, a reaction basic liquid chamber 4-13 and a reaction trigger liquid chamber 4-14, the upper part of the gas and liquid storage chamber 4-1 is connected with a suspension mandrel 3-2 through a difference short section 4-9 thread, the high-pressure nitrogen chamber 4-12 is connected with the reaction basic liquid chamber 4-13, the reaction trigger liquid chamber 4-14, a pneumatic cylinder control system 4-5 and a storage inner barrel assembly 5 through a plurality of transmission pipelines 4-6 respectively, a plurality of groups of electromagnetic valves 4-16 are arranged on the transmission pipelines 4-6 in series-parallel connection matching, a temperature and pressure measurement system 4-3 and a temperature and pressure feedback system 4-4 are integrally arranged inside a measurement feedback instrument chamber 4-2, the upper part of the measurement feedback instrument chamber 4-2 is connected with gas, the liquid storage chamber 4-1, the lower part of the measurement feedback instrument cabin 4-2 is connected with the storage inner cylinder assembly 5, the pneumatic cylinder control system 4-5 is composed of three pneumatic cylinders 4-10 and corresponding rigid connecting rods 4-11, the graphene coating 4-7 is attached to the outer surface of the coring inner cylinder 5-1 and is connected with the measurement feedback short section through cables 4-8, and the three pneumatic cylinders 4-10 are arranged in one-to-one correspondence with the three coring inner cylinders 5-1.
Referring to the attached figure 5, the storage inner cylinder assembly 5 comprises three coring inner cylinders 5-1, three ball valve assemblies 5-2, a core gripper assembly 5-3, a rock limiter 5-4, a heat preservation cylinder 5-5 and an inner cylinder centralizer 7, wherein: the three coring inner cylinders 5-1 are respectively a first coring inner cylinder, a second coring inner cylinder and a third coring inner cylinder from top to bottom, all three ball valve assemblies 5-2 are slide block ball valve assemblies, respectively a first ball valve, a second ball valve and a third ball valve from top to bottom, the three coring inner cylinders 5-1 are sequentially connected through the ball valve assemblies 5-2, the upper part of the first coring inner cylinder is connected with a measurement feedback short section in a threaded manner, the outer walls of the three coring inner cylinders 5-1 are respectively provided with gas injection holes 5-6 connected with a high-pressure nitrogen pipeline, the surfaces of the outer walls are covered with graphene coatings 4-7 and insulating layers, the outer wall of the third coring inner cylinder is additionally provided with reaction base liquid and reaction trigger liquid pipeline injection ports 5-7, an interlayer is arranged at the bottom, and a plurality of injection ports are arranged in the circumferential direction of the inner wall, the core hoop jaw assembly 5-3 comprises a clamping seat 5-8 and a clamping hoop 5-9, 5-8 threaded connection of clamp seat is between third inner tube of coring and ball valve, and 5-10 high-pressure nitrogen gas filling opening have been seted up to clamp seat 5-8 outer wall, and clamp outer wall inclined plane and clamp seat inner wall inclined plane form the contact pair, the slider valve rod 5-24 of ball valve assembly 5-2 connects upper portion pneumatic cylinder through rigid connection pole 4-11, and slider valve rod 5-24 installs inside the valve body slide way inslot, and pneumatic cylinder piston rod drives slider valve rod 5-24 and reciprocates in the inslot, and slider valve rod 5-24 passes through wire rope 5-26 and connects the valve body surface connecting axle, and valve body 5-23 can rotate through bolt axle 5-25 on the valve body.
Referring to attached figures 6 and 7, the ball valve assembly 5-2 comprises a ball valve bin 5-21, a sealing piston bin 5-22, a valve body 5-23, a slider valve rod 5-24, a rigid connecting rod, a bolt shaft 5-25 and a steel wire rope 5-26, wherein the ball valve bin 5-21 is in threaded connection with the sealing piston bin 5-22, the valve body 5-23 is connected with the ball valve bin 5-21 through the bolt shaft 5-25, a ball valve bearing 5-27 is arranged between the valve body and the valve body for facilitating the rotation of the valve body, a slideway 5-28 is welded on the ball valve bin 5-21, the slider valve rod 5-24 is arranged in the slideway 5-28, the slider valve rod 5-24 is connected with the rigid connecting rod 4-11 and is connected with the valve body 5-23 through the steel wire rope 5-26, the rigid connecting rod is connected with a pneumatic cylinder 4-10, the expansion of a piston rod in the pneumatic cylinder is controlled to drive the slide block valve rod 5-24 to slide up and down in the slide way 5-28, and simultaneously, the steel wire rope 5-26 is driven to move to realize the repeated opening and closing of the ball valve.
Referring to the attached drawings 8 and 9, the gas and liquid storage chamber 4-1 comprises a high-pressure nitrogen chamber 4-12, a reaction basic liquid chamber 4-13, a reaction trigger liquid chamber 4-14, a gas and liquid separation piston 4-15, a transmission pipeline 4-6 and an electromagnetic valve 4-16, wherein high-pressure nitrogen is stored in the high-pressure nitrogen chamber 4-12, the reaction basic liquid chamber 4-13 and the reaction trigger liquid chamber 4-14 are connected through the transmission pipeline 4-6, the gas and liquid separation piston 4-15 is sealed in the reaction basic liquid chamber 4-13 and the reaction trigger liquid chamber 4-14, and the electromagnetic valve 4-16 is installed on each transmission pipeline 4-6.
The use process of the invention is as follows:
the coring tool is put into a vertical well section, the flexible outer cylinder enters a horizontal section through a curvature section, drilling fluid is circulated, after a well bottom is cleaned, sediment and falling blocks do not exist, coring operation is carried out, the drilling fluid flows into the piston sleeve through a safety male connector and a central flow passage of a differential piston shaft 2-1, the piston sleeve is provided with a flow dividing passage 2-9, the drilling fluid is divided to the outside of the piston sleeve and further flows into an annular gap between the outer cylinder assembly and the inner cylinder assembly through a drilling fluid flow passage and a flow dividing hole 3-13, and finally the drilling fluid is sprayed out from a drill water hole to realize circulation of the drilling fluid.
After coring drilling is finished, a special soluble ball is put in, the soluble ball is seated on a ball seat on the inner wall of a differential piston shaft, after a pump is started, a flow channel is blocked by the soluble ball, drilling fluid enters an annular cavity (annular space) between a differential piston shaft 2-1 and a differential piston sleeve 2-2 through a differential piston shaft pressure relief hole 2-8, the pressure of the drilling fluid pushes the piston sleeve to move upwards along the piston shaft, all mechanisms in an outer barrel 8 are pulled to move relative to the outer barrel 8, a hoop 5-9 inclined plane moves along a hoop seat 5-8, the diameter is continuously reduced, a core is cut off, a high-pressure nitrogen chamber is controlled by an electromagnetic valve 4-16 to inject gas into a third pneumatic cylinder, a piston rod is pushed to extend out and is connected with a valve rod of a third ball valve slider at the lower end. And opening an electromagnetic valve of a reaction liquid chamber, enabling gas to enter the chamber to push a gas-liquid separation piston 4-15 to inject reaction base liquid and reaction trigger liquid, enabling the two liquids to enter a pipeline injection port of a third coring inner cylinder along with a pipeline, synchronously smearing the liquids to the surface along with the entering of the core, opening an impact electromagnetic valve, enabling the gas to enter the bottom of the first coring inner cylinder along with the pipeline, pushing the core to enter the first coring inner cylinder, and closing a first ball valve to realize sealing. When the soluble ball is dissolved and reduced and enters the differential piston sleeve 2-2, the spring rebounds to push the inner cylinder assembly to return to the position of the drill bit, the piston rod of the pneumatic cylinder retracts and drives the slide block valve rod 5-24 to move downwards, the ball valve is opened to perform next coring, the steps are repeated, and multi-point continuous coring is realized through repeated opening and closing of the ball valve.
After coring and sealed storage, real-time intelligent adjustment is carried out on occurrence conditions around a plurality of coring inner cylinders 5-1 and outer cylinders 8 through a temperature and pressure monitoring system and a temperature and pressure feedback system, pressure of the core cylinder is timely compensated through controlling a pressure maintaining electromagnetic valve of a high-pressure nitrogen chamber, and temperature of the core cylinder is timely compensated through electrifying a graphene coating 4-7 on the outer surface layer of the coring inner cylinder 5-1.
Claims (3)
1. The horizontal well in-situ monitoring fidelity continuous coring tool is characterized by comprising a safety assembly (1), a hexagonal differential reverse lifting mechanism (2), a hanging rotary assembly (3), an in-situ fidelity intelligent control assembly (4), a storage inner cylinder assembly (5), an outer cylinder (8) and a coring bit (9), wherein the safety assembly (1), an upper outer centralizer, the outer cylinder (8), a lower outer centralizer (6) and the coring bit (9) are fixedly connected in sequence to form the outer cylinder assembly, the outer cylinder (8) is a flexible outer cylinder, the hexagonal differential reverse lifting mechanism (2), the hanging rotary assembly (3), the in-situ intelligent control assembly (4) and the storage inner cylinder assembly (5) are fixedly connected in sequence to form the inner cylinder assembly, a safety male joint connected with a drill rod is arranged at the upper part of the safety assembly (1), the inner cylinder assembly is arranged in the outer cylinder assembly, the inner cylinder assembly is connected to the outer cylinder assembly through a suspension rotating assembly, and an inner cylinder centralizer (7) is arranged in an annular gap between the inner cylinder assembly and the outer cylinder assembly;
the hexagonal differential reverse lifting mechanism (2) comprises a differential piston shaft (2-1), a differential piston sleeve (2-2), a differential spring (2-3) and a buffer mechanism (2-4), the outer wall of the upper end of the differential piston shaft (2-1) is in threaded connection with a safety male joint, the inner wall of the bottom end of the differential piston shaft (2-1) is provided with a ball seat (2-5), the differential piston sleeve (2-2) is sleeved outside the differential piston shaft, the differential spring (2-3) is arranged outside the differential piston shaft between the differential piston sleeve (2-2) and the safety male joint, the outer step of the bottom end of the differential piston shaft (2-1) is a regular hexagon and is in axial sliding sealing fit with the inner wall of the regular hexagon of the differential piston sleeve, and an annular space (2-7) is formed between the differential piston shaft (2-1) and the differential piston sleeve (2-2), the differential piston sleeve (2-2) can move up and down along the differential piston shaft (2-1), the differential piston shaft (2-1) is provided with a central flow passage, the side wall of the lower end of the differential piston shaft (2-1) is provided with a pressure relief hole (2-8) which can be communicated with the annulus between the differential piston shaft (2-1) and the differential piston sleeve (2-2), the side wall of the differential piston sleeve (2-2) is provided with a flow dividing channel (2-9), the lower end of the differential piston sleeve (2-2) is in threaded connection with a conversion joint (2-10), and the lower end of the conversion joint (2-10) is in threaded connection with a buffer mechanism (2-4); the buffer mechanism (2-4) is composed of a buffer connecting shaft (2-11), a buffer tightening cap (2-12), a buffer lower joint (2-13) and a buffer spring, the outer wall of the upper end of the buffer connecting shaft (2-11) is in threaded connection with a conversion joint (2-10), the buffer tightening cap (2-12) is in threaded connection with the buffer lower joint (2-13), the buffer connecting shaft (2-11) is arranged in the buffer tightening cap (2-12) and the buffer lower joint (2-13), the buffer spring is sleeved at the lower end of the buffer connecting shaft (2-11), a buffer lower joint drilling fluid flow passage (2-14) and a pin hole (2-15) are circumferentially arranged at the bottom end of the buffer lower joint (2-13), and the buffer lower joint drilling fluid flow passage (2-14) is connected with the outer cylinder assembly through a suspension rotating assembly (3), The annular gaps between the inner cylinder assemblies are communicated;
the in-situ fidelity intelligent control assembly (4) comprises a gas-liquid storage chamber (4-1), a measurement feedback instrument cabin (4-2), a temperature and pressure measurement system (4-3), a temperature and pressure feedback system (4-4) and a pneumatic cylinder control system (4-5), wherein the gas-liquid storage chamber (4-1) comprises a high-pressure nitrogen chamber (4-12), a reaction basic liquid chamber (4-13) and a reaction trigger liquid chamber (4-14), the upper part of the gas-liquid storage chamber (4-1) is connected with a suspension mandrel (3-2) through a difference short section thread, the high-pressure nitrogen chamber (4-12) is connected with the reaction basic liquid chamber (4-13), the reaction trigger liquid chamber (4-14), the pneumatic cylinder control system (4-5) through a transmission pipeline (4-6) respectively, The device comprises a storage inner cylinder assembly (5), a plurality of groups of electromagnetic valves (4-16) which are matched in series and parallel are installed on a transmission pipeline (4-6), a temperature and pressure measurement system (4-3) and a temperature and pressure feedback system (4-4) are integrally installed inside a measurement feedback instrument cabin (4-2), the upper part of the measurement feedback instrument cabin (4-2) is connected with a gas-liquid storage chamber (4-1), and the lower part of the measurement feedback instrument cabin (4-2) is connected with the storage inner cylinder assembly (5); the pneumatic cylinder control system (4-5) consists of three pneumatic cylinders (4-10) and corresponding rigid connecting rods (4-11);
the storage inner cylinder assembly (5) comprises three coring inner cylinders (5-1), three ball valve assemblies (5-2), a core claw assembly (5-3), a rock limiter (5-4), a heat preservation cylinder (5-5) and an inner cylinder centralizer (7), wherein gas injection holes (5-6) are formed in the outer walls of the three coring inner cylinders (5-1), the gas injection holes (5-6) are connected with a high-pressure nitrogen chamber (4-12) through transmission pipelines (4-6), graphene coatings (4-7) and insulating layers are covered on the outer wall surfaces of the three coring inner cylinders (5-1), the three coring inner cylinders (5-1) are connected through the ball valve assemblies (5-2) in sequence, and the upper part of the first short section coring inner cylinder is connected with measurement feedback through threads; reaction base liquid and reaction trigger liquid injection ports (5-7) are additionally formed in the outer wall of the third coring inner barrel, an interlayer is arranged at the bottom of the third coring inner barrel, and a plurality of liquid injection ports are formed in the circumferential direction of the inner wall of the third coring inner barrel; the core claw assembly (5-3) comprises a clamp seat (5-8) and a clamp (5-9), the clamp seat (5-8) is in threaded connection between a third coring barrel and a third ball valve, a high-pressure nitrogen injection port (5-10) is formed in the outer wall of the clamp seat (5-8), and a contact pair is formed by the inclined surface of the outer wall of the clamp and the inclined surface of the inner wall of the clamp seat; a sliding block valve rod (5-24) of the ball valve assembly (5-2) is connected with a pneumatic cylinder through a rigid connecting rod, the sliding block valve rod (5-24) is installed inside a sliding channel groove of a valve body (5-23), the pneumatic cylinder piston rod drives the sliding block valve rod (5-24) to move up and down in the sliding channel groove of the valve body, the sliding block valve rod (5-24) is connected with a connecting shaft on the surface of the valve body through a steel wire rope (5-26), and the valve body rotates through a bolt shaft (5-25) on the valve body.
2. The horizontal well in-situ monitoring fidelity continuous coring tool of claim 1, wherein: the suspension rotating assembly (3) comprises a suspension joint (3-1), a suspension mandrel (3-2), a bearing tightening cap (3-3), a bearing group (3-4), a bearing seat (3-5) and a plug (3-6), a suspension joint drilling fluid flow channel circumferentially arranged at the upper end of the suspension joint (3-1) is communicated with a buffering lower joint drilling fluid flow channel, a pin hole (3-7) and a key groove (3-8) are circumferentially arranged at the upper end of the suspension joint (3-1), the suspension joint is hung on a buffering lower joint (2-13) in a matching mode through a suspension pin (3-9), a safety female joint is connected through a sliding screw (3-10), one end of the suspension pin (3-9) is locked and fixed through a plug (3-11), and the other end of the suspension pin abuts against the outer wall of a pin retaining sleeve (3-12), the upper part of the pin retaining sleeve (3-12) is circumferentially provided with a drilling fluid hole communicated with a drilling fluid flow passage of the suspension joint and a central cavity of the suspension mandrel, the bottom of the suspension mandrel (3-2) is circumferentially provided with a shunting hole (3-13), the shunting hole (3-13) is communicated with an annular gap between the outer cylinder assembly and the inner cylinder assembly below the shunting hole, and the lower end of the suspension mandrel (3-2) is plugged by a plug (3-6); a closed space formed by the suspension joint (3-1), the bearing tightening cap (3-3), the suspension mandrel (3-2) and the bearing seat (3-5) is called as a bearing box, the bearing group (3-4) is installed inside the bearing box, a thrust bearing (3-14) is arranged between the suspension mandrel (3-2) and the suspension joint (3-1), the lower end of the thrust bearing (3-14) is abutted against the step surface of the suspension mandrel, and the thrust bearing (3-14) and the bearing seat (3-5) form axial limit fit; a radial bearing (3-15) is further arranged between the suspension mandrel (3-2) and the suspension joint (3-1), a spacing component is arranged between the radial bearing (3-15) and the thrust bearing (3-14), and an axial steel wire retainer ring for positioning the radial bearing is arranged between the radial bearing (3-15) and the bearing locking cap (3-3).
3. The horizontal well in-situ monitoring fidelity continuous coring tool of claim 2, wherein: the safety assembly (1) comprises a safety male connector and a safety female connector, the outer wall of the lower end of the safety male connector is in threaded connection with the safety female connector, the inner wall of the lower end of the safety male connector is in threaded connection with the differential piston shaft (2-1), and the outer wall of the lower end of the safety female connector is connected with the upper outer centralizer.
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| CN202011080831.6A CN112012685B (en) | 2020-10-11 | 2020-10-11 | Horizontal well in-situ monitoring fidelity continuous coring tool |
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| CN112878941B (en) * | 2021-01-22 | 2022-05-13 | 东北石油大学 | Horizontal well burial type continuous coring inner barrel assembly |
| CN115142804B (en) * | 2021-03-31 | 2023-07-25 | 中国石油天然气集团有限公司 | Pressure maintaining coring tool |
| CN113202434B (en) * | 2021-06-23 | 2021-12-17 | 东北石油大学 | Self-compensating type in-situ drilling coring and testing device |
| CN113432918B (en) * | 2021-08-27 | 2021-11-16 | 江苏宝诺铸造有限公司 | Civil engineering intelligence exploration sampling device |
| CN114320197B (en) * | 2022-02-12 | 2023-08-25 | 东北石油大学 | Piston type controllable differential mechanism for fidelity coring device |
| CN114991767B (en) * | 2022-07-01 | 2023-09-05 | 中国地质科学院勘探技术研究所 | Deep typical weak source gas drilling continuous in-situ sampling device and sampling method |
| CN115876516B (en) * | 2022-07-12 | 2023-07-04 | 平顶山天安煤业股份有限公司 | Self-cleaning pressure-maintaining coring equipment and application method thereof |
| CN116065996B (en) * | 2022-08-02 | 2024-04-26 | 中国石油天然气集团有限公司 | Pressure-control coring tool and method for ultra-deep well |
| CN116065997B (en) * | 2022-08-02 | 2024-04-26 | 中国石油天然气集团有限公司 | Ball valve sealing device and method for pressure maintaining coring tool |
| CN116557024B (en) * | 2023-06-27 | 2024-03-26 | 山东兖能泰德重工有限公司 | Hard rock rotary connecting rod |
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| CN2584807Y (en) * | 2002-11-29 | 2003-11-05 | 青岛海洋地质研究所 | Pressure retaining thermal insulation core extracting pipe for natrual gas hydrate at deep water shallow hole station |
| WO2013110162A1 (en) * | 2012-01-27 | 2013-08-01 | Atlas Copco Canada Inc. | Core barrel head assembly |
| CN106121575B (en) * | 2016-08-10 | 2019-05-07 | 中国石油天然气股份有限公司 | Flexible coring tool |
| CN207620785U (en) * | 2017-12-12 | 2018-07-17 | 中国地质科学院水文地质环境地质研究所 | A kind of multisection type High-Temperature Well Logging equipment |
| CN111335837B (en) * | 2018-12-19 | 2022-06-03 | 中国石油天然气股份有限公司 | Pressure-maintaining coring inner barrel for coal rock |
| CN209586310U (en) * | 2019-01-31 | 2019-11-05 | 大庆市达美石油装备制造有限公司 | Mechanical differential coring tool |
| CN110552644B (en) * | 2019-10-05 | 2024-01-23 | 中国石油大学(华东) | In-situ coal rock heat-preserving pressure-maintaining coring device and application method |
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