CN209855732U - Rock sample in-situ fidelity coring system - Google Patents

Abstract

The utility model discloses a rock sample normal position fidelity coring system, which comprises a driving module, a fidelity module and a coring module which are connected in sequence, wherein the coring module comprises a rock core drilling tool and a rock core sample storage barrel, the fidelity module comprises a rock core sample fidelity cabin, the driving module comprises a coring drilling machine, and the coring drilling machine comprises a drilling machine outer barrel unlocking mechanism; the core drilling tool comprises a core drilling tool, a core catcher and an inner core pipe, wherein the core drilling tool comprises an outer core pipe and a hollow drill bit, and the drill bit is connected with the lower end of the outer core pipe; the lower end of the inner core pipe extends to the bottom of the outer core pipe, and the inner core pipe is in clearance fit with the outer core pipe; the core sample fidelity cabin comprises an inner core taking barrel, an outer core taking barrel and an energy accumulator, wherein the outer core taking barrel is sleeved on the inner core taking barrel, the upper end of the inner core taking barrel is communicated with a liquid nitrogen storage tank, the liquid nitrogen storage tank is positioned in the outer core taking barrel, the energy accumulator is communicated with the outer core taking barrel, and the outer core taking barrel is provided with a flap valve. The utility model discloses be favorable to the core to keep its state under the normal position environment to can improve drilling rate, improve and get core efficiency.

Description

Rock sample in-situ fidelity coring system

Technical Field

The utility model relates to an oil gas field exploration field especially relates to rock specimen normal position fidelity coring system.

Background

In the process of oil field exploration, the core is an important data for finding a hydrocarbon reservoir and researching a stratum, a petroleum reservoir, an oil reservoir, a cover layer, a structure and the like, and the lithology, the physical property and the oil, gas and water containing characteristics of an underground rock stratum can be directly known through the observation and research of the core. After the oil field is put into development, oil layer deposition characteristics, physical properties of a reservoir layer, a pore structure, wettability, relative permeability and lithofacies characteristics, oil layer physical simulation and an oil layer water flooding rule are further researched and known through a rock core; the method is used for recognizing and mastering the flooding characteristics of oil layers in different development stages and different water-containing stages, clearing the distribution of residual oil and providing scientific basis for oil field development scheme design, layer system and well pattern adjustment and well encryption.

Coring is carried out by taking underground rock on the ground in pieces called cores during the drilling process using a special coring tool, and by using the pieces, various properties of the rock can be measured, the underground structure and the rock deposition environment can be studied intuitively, and the fluid properties and the like in the underground structure and the rock deposition environment can be known. In the mineral exploration and development process, drilling work needs to be carried out according to the geological designed stratum horizon and depth, a coring tool is put into a well, a core sample taken out is drilled and stored in a core storage cabin, and in the equipment ascending process, environmental parameters such as temperature and pressure of the core storage cabin can be reduced, so that the core cannot keep the state of the core in an in-situ environment.

The coring tool comprises a coring drilling tool and a core catcher, after the coring drilling tool cuts into the stratum, the core catcher is used for keeping the core in the inner barrel, and the existing core catcher can only take soft rock and is difficult to take hard rock. In addition, the prior core drill has the disadvantages of slow cooling speed of the blade, fast abrasion of the cutter and short service life of the blade. Before coring, the coring equipment is required to be integrally placed into a drilling well, after the coring equipment reaches a working position, the rear part of the coring equipment is fixed, and the front working mechanism releases restraint and continues to work forwards.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a rock sample normal position fidelity coring system, which is beneficial to the rock core to keep the state under the normal position environment, and can improve the drilling speed and the coring efficiency; the outer cylinder can be locked before the core drilling machine works, and the core drilling machine starts to work to remove the restraint on the outer cylinder.

In order to achieve the purpose, the utility model adopts the following technical proposal to realize:

the utility model discloses a rock sample normal position fidelity coring system, including drive module, fidelity module and the coring module that connects gradually, coring module core bores instrument, core sample storage cylinder, the fidelity module includes core sample fidelity cabin, drive module includes the coring rig, the coring rig includes rig urceolus release mechanism;

the core drilling tool comprises a core drilling tool, a core catcher and an inner core tube, the core drilling tool comprises an outer core tube and a hollow drill bit, and the drill bit is connected with the lower end of the outer core tube; the core catcher comprises an annular base body and a plurality of clamping jaws, the annular base body is coaxially arranged on the inner wall of the lower end of the inner core pipe, the clamping jaws are uniformly arranged on the annular base body, the lower ends of the clamping jaws are connected with the annular base body, and the upper ends of the clamping jaws are inwards folded; the lower end of the inner core pipe extends to the bottom of the outer core pipe, and the inner core pipe is in clearance fit with the outer core pipe;

the rock core sample storage cylinder comprises a rock core cylinder, a drilling machine outer cylinder, a flap valve and a trigger mechanism, wherein the flap valve comprises a valve seat and a sealing valve clack, the valve seat is coaxially arranged on the inner wall of the drilling machine outer cylinder, one end of the sealing valve clack is movably connected with the outer side wall of the upper end of the valve seat, and the top of the valve seat is provided with a valve port sealing surface matched with the sealing valve clack; the core sample fidelity cabin comprises an inner core taking barrel, an outer core taking barrel and an energy accumulator, wherein the outer core taking barrel is sleeved on the inner core taking barrel, the upper end of the inner core taking barrel is communicated with a liquid nitrogen storage tank, the liquid nitrogen storage tank is positioned in the outer core taking barrel, the energy accumulator is communicated with the outer core taking barrel, and the outer core taking barrel is provided with a flap valve;

the outer cylinder unlocking mechanism of the drilling machine comprises a connecting pipe, an outer cylinder and a lock pin, wherein the connecting pipe, the outer cylinder and the lock pin are coaxial, the lock pin is arranged in the connecting pipe, the outer diameter of the front section of the connecting pipe is smaller than the inner diameter of the outer cylinder, a through hole A is formed in the side wall of the front section of the connecting pipe, the outer wall of the lock pin is provided with a groove A, the inner wall of the outer cylinder is provided with a groove B, the lock pin also comprises a pin, the length of the pin is larger than the depth of the through hole A, the pin is arranged in the through hole A, the outer end of the pin is chamfered and/or the side surface of the groove B is an inclined surface, the width of the groove A is not less than the width of the inner end of the pin, the width of the groove B is not less than the width of the outer end of the pin, before starting, the front end of the connecting pipe is arranged in the outer cylinder, the pin is arranged in front of the groove A, the inner end surface of the pin is in sliding fit with the outer wall of the lock pin, the outer end of the pin is embedded in the, the inner end of the pin is embedded into the groove A, and the distance from the inner end surface of the pin to the inner wall of the outer barrel is greater than the length of the pin;

further, core sample fidelity cabin still includes electric heater, temperature sensor, locates interior core barrel and the liquid nitrogen storage jar between automatically controlled valve, pressure sensor, locate the energy storage ware and the outer three-way stop valve A who gets between the core barrel, energy storage ware and outer core barrel are connected respectively to two ports of three-way stop valve A, and the relief valve is connected to three-way stop valve A's third port, and three-way stop valve A is automatically controlled valve, temperature sensor, pressure sensor connect the processing unit, electric heater, automatically controlled valve, three-way stop valve A all are controlled by the processing unit, electric heater is used for external core barrel inside heating, temperature sensor is used for detecting the temperature in the fidelity cabin, pressure sensor is used for detecting the pressure in the fidelity cabin.

Preferably, the drill bit includes the first order blade that is used for drilling and is used for reaming second level blade, and the drill bit includes interior drill bit and outer drill bit, interior drill bit is installed in outer drill bit, and the first order blade is located interior drill bit lower extreme, and the second level blade is located outer drill bit lateral wall, the first order blade is equipped with threely at circumferencial direction equidistant, and the second level blade is equipped with threely at circumferencial direction equidistant, and first order blade and second level blade department all are equipped with coolant liquid return circuit hole on the drill bit.

Preferably, the outer core tube and the outer wall of the drill bit are both provided with spiral grooves, and the spiral grooves on the drill bit are continuous with the spiral grooves on the outer core tube.

Preferably, the jaw includes vertical arm and the slope arm of integrated into one piece manufacturing, vertical arm lower extreme is connected with the annular base member, and vertical arm upper end is connected with the lower extreme of slope arm, and the upper end of slope arm is the free end, and the slope arm is from up inwards inclining down, and the angle of inclination of slope arm is 60.

Preferably, the sealing valve clack comprises an elastic sealing ring, an elastic connecting strip, a sealing element and a plurality of locking strips which are sequentially arranged in parallel, the elastic connecting strip connects all the locking strips in series and hoops all the locking strips together by the elastic sealing ring to form an integral structure, a clamping groove matched with the elastic sealing ring is formed in each locking strip, the elastic sealing ring is arranged in each clamping groove, the sealing element is arranged between every two adjacent locking strips, and one end of the valve clack is movably connected to the upper end of the valve seat through a limiting hinge; the valve clack is arc-shaped when not turned down, and is attached to the outer wall of the inner coring barrel; the valve clack is plane when turning down and covers the upper end of the valve seat.

Furthermore, a sealing cavity is formed in the inner wall of the outer coring barrel, the turnover plate is located in the sealing cavity, and the sealing cavity is communicated with the inner coring barrel; and a sealing ring is arranged on the inner wall of the outer coring barrel and is positioned below the flap valve.

Preferably, the electric heater is a resistance wire, the resistance wire is embedded in the inner wall of the outer coring barrel, the resistance wire is coated with an insulating layer, the inner wall of the inner coring barrel is attached with a graphene layer, and the upper part of the inner coring barrel is filled with a water-dripping film-forming agent.

Preferably, interlocking device is connected at the connecting pipe rear, actuating mechanism is connected at the lockpin rear, recess A side is the inclined plane, drill bit and hydraulic motor rotor are connected in urceolus the place ahead, the lockpin rear even has retaining member A, the connecting pipe rear even has retaining member B, retaining member A external diameter is greater than retaining member B internal diameter, retaining member A is in retaining member B rear, pin outer end chamfer and radial cross section contained angle and recess B side are each other with radial cross section's contained angle, the pin includes pin fin (41) and nail body, and through-hole A is equipped with nail head section and nail body section correspondingly.

Preferably, the length of the nail head is smaller than the depth of the nail head section, and the length of the nail body is larger than the depth of the nail body section; the through-hole A is the round hole, and through-hole A has 3, and the axial distance that through-hole A hole center was the same to the connecting pipe front end, 3 through-hole A along circumference evenly distributed.

The utility model has the advantages as follows:

1. the utility model discloses but self-heating and cooling fidelity cabin are favorable to the core to keep its state under the normal position environment.

2. The utility model discloses but automatic pressure boost fidelity cabin is favorable to the core to keep its state under the normal position environment.

3. The utility model discloses a panel turnover mechanism can be when getting the core completion self-sealing fidelity cabin, simple structure, safe and reliable.

4. The utility model discloses a graphite alkene layer can reduce the sliding resistance of core in PVC intraductal side, improves inboard intensity and surface accuracy simultaneously, reinforcing coefficient of thermal conductivity etc..

5. The utility model discloses a drilling fluid through the fidelity intracavity can be completely cut off to the seal chamber.

6. The utility model relates to a mechanical jack catch which is folded upwards and inwards, when the jack catch descends, the jack catch is easily propped open by the rock core, so that the rock core enters the inner core barrel; when the jack catch moves upwards, the jack catch is difficult to be propped open by the core, the core is broken at the jack catch due to the fact that the core cannot resist large tensile force and the clamping effect of the jack catch, and the broken core continues to move upwards along with the jack catch so as to be kept in the inner cylinder;

7. the utility model has the advantages that the drill bit is divided into two stages of blades, the blade at the bottom firstly drills a small hole, and then the blade above reams the hole, so that the drilling speed can be improved, and the coring efficiency is improved;

8. the utility model is provided with through holes as cooling liquid loop holes at the blade part, and the cooling liquid can be sprayed out through the through holes to cool the blade, thereby quickening the cooling speed of the blade, reducing the abrasion of the cutter and prolonging the service life of the blade;

9. the outer wall of the outer core tube is provided with a spiral groove which is continuous with the drill bit, and the outer core tube creates a closed space for the coring tool along with the screwing of the outer core tube into a rock stratum, so that the fidelity chamber can be prevented from being polluted;

10. the outer cylinder can be locked before the core drilling machine works, and the core drilling machine starts to work to remove the restraint on the outer cylinder.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a core sample fidelity capsule;

FIG. 3 is a schematic structural view of a core drilling tool;

FIG. 4 is a schematic view showing the structure of the inner core tube;

FIG. 5 is an enlarged view at A in FIG. 4;

FIG. 6 is a three-dimensional perspective view of the core catcher;

FIG. 7 is a cross-sectional view of the core catcher;

FIG. 8 is a schematic view of the core drill;

FIG. 9 is a schematic view of the construction of the drill bit;

fig. 10 is a schematic view of the structure of the outer drill body;

FIG. 11 is a schematic view of the construction of the inner drill body;

FIG. 12 is a schematic structural view of the flap valve when the flap valve is not turned down;

FIG. 13 is a schematic view of the structure of the flap valve when the flap valve has been flipped down;

FIG. 14 is a schematic view of the structure of the valve flap;

FIG. 15 is a schematic structural view of a sealed chamber;

FIG. 16 is a partial cross-sectional view of an inner wick cartridge;

fig. 17 is an electrical schematic diagram of the present invention;

FIG. 18 is a schematic view of the outer cylinder unlocking mechanism of the drilling machine before being activated; FIG. 19 is a schematic view of the drill after the outer cylinder unlocking mechanism is activated;

FIG. 20 is a pin view;

FIG. 21 is a schematic view of a connecting tube;

figure 22 is a schematic view of the locking pin.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings.

As shown in figure 1, the utility model discloses a core system is got in rock specimen fidelity, including the drive module 300, the fidelity module 200 that connect gradually and get core module 100, get core module core and bore instrument, core sample storage tube, the fidelity module includes core sample fidelity cabin, and drive module is including getting the core rig, and it includes rig urceolus release mechanism to get the core rig

As shown in fig. 2, the core fidelity cabin comprises a mechanical part and a control part, wherein the mechanical part comprises an inner core taking barrel 28, an outer core taking barrel 26 and an energy accumulator 229, the energy accumulator 229 is communicated with the outer core taking barrel, the inner core taking barrel 28 is used for placing the core 21, the outer core taking barrel 26 is sleeved on the inner core taking barrel 26, the upper end of the inner core taking barrel 28 is communicated with a liquid nitrogen storage tank 225, an electric control valve 226 is arranged on a communication pipeline between the inner core taking barrel 28 and the liquid nitrogen storage tank 225, the liquid nitrogen storage tank 225 is positioned in the outer core taking barrel 26, and the outer core taking barrel 26 is provided with a flap valve 23.

As shown in fig. 3 and 8, the core drilling tool comprises a core drill, a core catcher 11 and an inner core tube 12, the core drill comprises an outer core tube 13 and a hollow drill 14, the drill 14 is connected with the lower end of the outer core tube 13, the core catcher 11 is arranged on the inner wall of the lower end of the inner core tube 12, and the lower end of the inner core tube 12 extends to the bottom of the outer core tube 13 and is in clearance fit with the outer core tube 13.

As shown in fig. 6 and 7, the core catcher 11 includes an annular base 111 and a plurality of jaws 112, the jaws 112 are uniformly arranged on the annular base 111, the lower ends of the jaws 112 are connected with the annular base 111, and the upper ends of the jaws 112 are inwardly closed. There are 8-15 jaws 112, and preferably there are 12 jaws 112. The number of the claws 112 may be set as needed, and is not limited to the above number.

The claw 112 includes an integrally formed vertical arm 1121 and an inclined arm 1122, a lower end of the vertical arm 1121 is connected to the annular base 11, an upper end of the vertical arm 1121 is connected to a lower end of the inclined arm 1122, an upper end of the inclined arm 1122 is a free end, the inclined arm 1122 is inclined inward from bottom to top, and an inclination of the inclined arm 1122 can be adjusted as required. In the present embodiment, the inclination angle of the inclined arm 1122 is 60 °, and the width of the claw 112 gradually decreases from bottom to top.

Wherein, the thickness of the claw 112 is equal to the thickness of the annular base body 111, and the claw 112 and the annular base body 111 are manufactured integrally. The annular base 111 is sleeved with an annular sleeve 17, and the annular base 111 is fixedly connected with the annular sleeve 17. The inner wall of the inner core tube 12 is provided with a graphene coating. As shown in fig. 4 and 5, the inner core tube 12 includes a core barrel 121 and a core sleeve 122, the upper end of the core sleeve 122 is fixed to the lower end of the core barrel 121 in a sleeving manner, the inner wall of the core sleeve 122 has an annular groove 123 adapted to the annular sleeve 17, the annular sleeve 17 is installed in the annular groove 123, and the free end of the claw 112 faces upward. The free ends of the jaws 112 are directed upwards and inwards, so that the jaws 112 are easily spread when the core passes through the hard core catcher 11 from below upwards, and vice versa.

The drill bit 14 is a PCD cutter. As shown in fig. 8 and 9, the drill bit 14 includes an inner drill bit 141 and an outer drill bit 142, and the inner drill bit 141 includes a first stage blade 1411 and a hollow inner drill bit body 1121412. As shown in fig. 11, the lower end of the inner drill block 1121412 has a first stage insert mounting groove 1413 for mounting a first stage insert 1411, the first stage insert mounting groove 1413 opens at the lower end surface of the inner drill block 1121412, a cooling fluid circuit hole 15 is formed in the first stage insert mounting groove 1413 of the inner drill block 1121412, the cooling fluid circuit hole 15 is an arc-shaped hole, and the arc-shaped hole opens at the front end surface of the drill bit 4 and is communicated with the first stage insert mounting groove 1413. Three first-stage blade mounting grooves 1413 are formed in the inner drill blade body 1121412 at equal intervals in the circumferential direction, a cooling liquid loop hole 15 is formed in each first-stage blade mounting groove 1413, and a first-stage blade 1411 is mounted in each first-stage blade mounting groove 1413.

The outer drill bit 142 includes a secondary blade 1421 and a hollow outer drill body 1422. As shown in fig. 10, the outer wall of the secondary blade 1421 has a secondary blade mounting groove 1423 for mounting the secondary blade 1421, and a cooling liquid loop hole 15 is formed in the secondary blade mounting groove 1423 of the outer drill body 1422, where the cooling liquid loop hole 15 is a strip-shaped hole, and the strip-shaped hole is communicated with the secondary blade mounting groove 1423. The outer drill cutter body 1422 is provided with three second-stage blade mounting grooves 1423 at equal intervals in the circumferential direction, each second-stage blade mounting groove 1423 is provided with a cooling liquid loop hole 15, and each second-stage blade mounting groove 1423 is provided with a second-stage blade 1421.

The inner drill 141 is installed in the outer drill 142, a first-stage blade avoiding notch 1424 is formed in the outer drill body 1422 at a position corresponding to the first-stage blade 1411, the first-stage blade avoiding notch 1424 is opened in the front end surface of the outer drill 142, and a cutting edge of the first-stage blade 1411 is exposed out of the outer drill body 1422 from the first-stage blade avoiding notch 1424.

The inner wall of the inner drill cutter 1121412 is provided with a sealing ring 18, the sealing ring 18 is positioned above the first-stage blade 1411, and the high-elasticity annular sealing ring is utilized to wrap a rock core in the coring process, so that the isolation quality guarantee effect is achieved, and the moisture preservation and quality guarantee targets are achieved.

The utility model discloses well drill bit divide into the second grade blade, by the first order blade 1411 of lower extreme at first bore the aperture, by the second grade blade 1421 reaming of top again, can improve drilling rate. Through holes are provided as coolant circuit holes 15 at the blade portions, through which coolant can be sprayed to cool the blade. The utility model discloses utilize carbide sharp mouthful thin lip drill bit cutting rock stratum, reduce the disturbance of getting the core process to the stratum, guarantee to get core integrity and quality.

As shown in fig. 3, 8 and 10, the outer walls of the outer core tube 13 and the outer drill body 1422 are provided with spiral grooves 6, and the spiral groove 16 on the outer drill body 1422 is continuous with the spiral groove 16 on the outer core tube 13. The outer core tube 13 with the spiral groove 16 on the outer wall is equivalent to a spiral outer drill, along with the fact that the outer core tube 13 is screwed into a rock stratum, the outer core tube 13 creates a closed space for a coring tool, and the sealing ring 18 wraps the rock core in the coring process to prevent the fidelity chamber from being polluted.

In operation, as the drill bit 14 drills, a core enters the inner core tube 12 and passes through the middle of the core catcher 1, and the hard claws 112 are opened when the core passes through the claws 112; after the drilling is stopped, when the drill pipe is pulled upwards, the claw 112 moves upwards along with the inner core pipe 12, because the free end of the claw 112 is retracted, the claw 112 is difficult to be propped open by the rock core, because the rock core cannot resist large pulling force and the free end of the claw 112 is retracted and clamped, the rock core is broken at the claw 112, and the broken rock core continues to move upwards along with the claw 112 so as to be kept in the inner core pipe 12.

As shown in fig. 12, 13 and 14, the flap valve 23 includes a valve seat 236 and a valve flap 237, the valve flap 237 includes an elastic sealing ring 234, an elastic connecting strip 232, a sealing element and a plurality of locking strips 235 arranged in parallel in sequence, the elastic connecting strip 232 connects all the locking strips 235 in series and the elastic sealing ring 234 hoops all the locking strips 235 together to form an integral structure, the locking strips 235 are provided with a clamping groove 231 adapted to the elastic sealing ring, the elastic sealing ring 234 is installed in the clamping groove 231, the sealing element is arranged between two adjacent locking strips 235, and one end of the valve flap 23 is movably connected to the upper end of the valve seat 236 through a limit hinge 233; the valve clack 237 is arc-shaped when not turned down, and the valve clack 237 is attached to the outer wall of the inner coring barrel 28; the flap 237 is flat when flipped down and covers the upper end of the valve seat 236.

As shown in FIG. 15, the inner wall of the outer coring barrel 26 is provided with a sealing cavity 239, and the sealing cavity 239 is communicated with the inner coring barrel 28.

As shown in fig. 16, the inner core barrel 28 is made of PVC, a graphene layer 281 is attached to the inner wall of the inner core barrel 28, and the inner core barrel 28 is filled with a dripping film forming agent 282.

As shown in fig. 17, the control part comprises an electric heater 2214, a temperature sensor 25 and an electric control valve 226 arranged in the pipeline, the temperature sensor 25 is connected with the processing unit 224, the electric heater 2214 is connected with the power supply 228 through a switch 227, the switch 227 and the electric control valve 226 are controlled by the processing unit 224, the electric heater is used for heating the interior of the outer core barrel, and the temperature sensor 25 is used for detecting the temperature in the fidelity chamber; the electric heater 2214 is a resistance wire embedded in the inner wall of the outer coring barrel, the resistance wire is coated with an insulating layer, and the power supply 228 of the control part is positioned on the outer coring barrel. The control part further comprises a pressure sensor 27 and a three-way stop valve A2210, wherein two ports of the three-way stop valve A2210 are respectively connected with the energy accumulator 229 and the external coring barrel 26, a third port of the three-way stop valve A2210 is connected with the pressure release valve 2211, the three-way stop valve A2210 is an electric control valve, the pressure sensor 27 and the three-way stop valve A2210 are both connected with the processing unit 224, and the pressure sensor 27 is used for detecting the pressure in the fidelity chamber.

The utility model discloses still include manometer 2212, manometer 2212 is through the outer coring section of thick bamboo of three-way stop valve B213 intercommunication.

The temperature in the fidelity chamber is detected in real time through the temperature sensor, and compared with the previously tested in-situ temperature of the rock core, the electric heater is controlled to heat or the electric control valve is controlled to open to inject liquid nitrogen into the fidelity chamber to cool the fidelity chamber according to the difference of the two temperatures, so that the temperature in the constant fidelity chamber is the same as the in-situ temperature of the rock core. 2. The pressure in the fidelity cabin is detected in real time through the pressure sensor, and compared with the previously tested in-situ pressure of the rock core, the on-off of the three-way stop valve A is controlled according to the difference of the two pressures, so that the pressure in the fidelity cabin is increased to keep the same as the in-situ pressure of the rock core.

As shown in fig. 18 and 19, the outer cylinder unlocking mechanism of the drilling machine comprises a connecting pipe 32, an outer cylinder 33 and a lock pin 31, the connecting pipe 32, the outer cylinder 33 and the lock pin 31 are coaxial, the lock pin 31 is arranged in the connecting pipe 32, the outer diameter of the front section of the connecting pipe 32 is smaller than the inner diameter of the outer cylinder 33, the side wall of the front section of the connecting pipe 32 is provided with a through hole a321, the through hole a321 is a round hole, the through holes a321 are 3, the axial distance from the center of the through hole a321 to the front end of the connecting pipe 32 is the same, the 3 through holes a321 are uniformly distributed along the circumference, the outer wall of the lock pin 31 is provided with an annular groove a311, the side surface of the groove a311 is an inclined surface, the inner wall of the outer cylinder 33 is provided with an annular groove B331, the pin 34 is further provided, the length of the pin 34 is larger than the depth of the through hole a21, the pin 34 comprises a pin head 341 and a pin body 342, the pin head 341 is arranged at the inner side, the through hole A321 is correspondingly divided into a pin head section 3211 and a pin body section 3212, the pin head section 3211 is arranged at the inner side, the inner diameter of the pin head section 3211 is not smaller than the outer diameter of the pin head 341, the inner diameter of the pin body section 3212 is not smaller than the outer diameter of the pin body 342, the length of the pin head 341 is smaller than the depth of the pin head section 3211, the length of the pin body 342 is larger than the depth of the pin body section 3212, the width of the groove A311 is not smaller than the width of the inner end of the pin 34, the width of the groove B331 is not smaller than the width of the outer end of the pin 34, the locking member A is connected behind the locking member A, the locking member B is connected behind the connecting pipe 32, the outer diameter of the locking member A is larger than the inner diameter of the locking member B, the locking member A and, the drill and the hydraulic motor rotor are connected to the front of the outer cylinder 33.

Before starting, the front end of the connecting pipe 32 is arranged in the outer cylinder 33, the pin 34 is arranged in front of the groove A11, the inner end face of the pin 34 is in sliding fit with the outer wall of the lock pin 31, the outer end of the pin 34 is embedded into the groove B31, after starting, the inner end of the pin 34 is embedded into the groove A311, and the distance from the inner end face of the pin 34 to the inner wall of the outer cylinder 33 is larger than the length of the pin 34.

As shown in FIG. 20, the length of the pin 34 is 17.3mm, wherein the length of the head 341 is 4.8mm, the length of the shank 342 is 12.5mm, the outer diameter of the head 341 is 12mm, the outer diameter of the shank 342 is 10mm, and the inner and outer end faces of the pin 34 are chamfered at 2.5mm multiplied by 45 degrees.

As shown in fig. 21, the connecting pipe 32 comprises a front connecting pipe section and a rear connecting pipe section, the rear connecting pipe section sequentially comprises a rear connecting section 322 and a liquid outlet section 323 from back to front, the front connecting pipe section sequentially comprises a nail-containing section 324 and a front connecting section 325 from back to front, the inner diameter of the rear connecting section 322 is larger than the inner diameter of the liquid outlet section 323, the outer diameter of the rear connecting section 322 is larger than the outer diameter of the liquid outlet section 323, the front end surface of the rear connecting section 322 inclines forwards from outside to inside and forms an angle of 45 degrees with the radial section, the rear connecting section 322 is provided with internal threads, the liquid outlet section 323 is provided with a through hole B326, the through hole B326 is a pressure relief hole, the outer diameter of the liquid outlet section 323 is 94.5mm, the inner diameter of the liquid outlet section 323 behind the through hole B326 is 74mm, the inner diameter of the liquid outlet section 323 in front of the through hole B326 is 72mm, the front end surface of, the front side and the rear side of the through hole B26 are semicircular surfaces, the radius of the semicircular surfaces is 8mm, the outer wall of the liquid outlet section 323 is provided with a diversion groove 327, the width of the diversion groove 327 is 15mm, the diversion groove 327 is arranged right in front of the through hole B26, the through hole B326 and the diversion groove 327 are both 2 and are uniformly distributed along the circumference, the inner diameter of the front section of the connecting pipe is 50mm, the inner wall of the liquid outlet section 323 is connected with the inner wall of the section 324 containing the nail through an inclined plane with an included angle of 45 degrees with the radial section, the connecting position of the inner wall of the section 324 containing the nail and the inclined plane with an included angle of 45 degrees with the radial section is arranged in the liquid outlet section 323, the through hole A321 is arranged in the section 24 containing the nail, the pipe wall thickness of the section 324 containing the nail is 14mm, the through hole A321 is divided into a nail head section 3211 and a nail body section 3212, the depth of the nail head section 1 is 5mm, the depth of the nail section is 9mm, the nail body section is 3211 mm, the aperture of the nail body section is, the front end face of the nail-containing section 324 inclines backwards from outside to inside, the included angle between the front end face and the radial section is 15 degrees, the length of the rear connecting section 322 is 155mm, the length of the liquid outlet section 323 is 35mm, the length of the nail-containing section 324 is 25mm, the length of the front connecting section 325 is 65mm, and the front connecting section 325 is provided with external threads.

As shown in fig. 22, the inner diameter of the lock pin 31 is 32mm, the length of the lock pin 31 is 220mm, the lock pin 31 is provided with a connecting part 312, a working part 313 and an inserting part 314 in sequence from back to front, the length of the connecting part 312 is 38mm, the outer diameter of the connecting part 312 is 38mm, the outer wall of the connecting part 312 is provided with threads of M40 multiplied by 1.5, the region of the outer wall of the connecting part 312, which is not more than 8mm from the front end face of the working part 313, is not provided with threads, the length of the working part 313 is 63mm, the outer diameter is 50mm, the groove a311 is arranged on the outer wall of the working part 313, the distance from the bottom surface of the groove a311 to the axis of the lock pin 1 is 22.5mm, the distance from the front end of the opening of the groove a311 to the front end of the connecting part 312 is 59mm, the opening width of the groove.

Before the drilling machine is started, the pin 34 is embedded into the groove B331, and the outer cylinder 33 can be fixed; when the drilling machine is started, the locking pin 31 slides forwards, the inner end of the pin 34 is in sliding fit with the outer wall of the locking pin 31, when the groove A311 slides forwards to the position which is in the same axial direction as the pin 34, the outer cylinder 33 generates forward pressure by utilizing the self gravity, the contact surface of the groove B331 and the pin 34 is an inclined surface, the groove B331 extrudes the inclined surface of the pin 34, the pin 34 withdraws from the groove B331 and is pressed into the groove A311, and the constraint on the outer cylinder 33 is released.

Of course, the present invention may have other embodiments, and those skilled in the art may make various corresponding changes and modifications according to the present invention without departing from the spirit and the essence of the present invention, and these corresponding changes and modifications should fall within the protection scope of the appended claims.

Claims (10)

1. Rock specimen normal position fidelity coring system, its characterized in that: the core drilling machine comprises a driving module, a fidelity module and a coring module which are sequentially connected, wherein the coring module comprises a core drilling tool and a core sample storage barrel, the fidelity module comprises a core sample fidelity cabin, the driving module comprises a coring drilling machine, and the coring drilling machine comprises a drilling machine outer barrel unlocking mechanism;

the core drilling tool comprises a core drilling tool, a core catcher and an inner core tube, the core drilling tool comprises an outer core tube and a hollow drill bit, and the drill bit is connected with the lower end of the outer core tube; the core catcher comprises an annular base body and a plurality of clamping jaws, the annular base body is coaxially arranged on the inner wall of the lower end of the inner core pipe, the clamping jaws are uniformly arranged on the annular base body, the lower ends of the clamping jaws are connected with the annular base body, and the upper ends of the clamping jaws are inwards folded; the lower end of the inner core pipe extends to the bottom of the outer core pipe, and the inner core pipe is in clearance fit with the outer core pipe;

the rock core sample storage cylinder comprises a rock core cylinder, a drilling machine outer cylinder, a flap valve and a trigger mechanism, wherein the flap valve comprises a valve seat and a sealing valve clack, the valve seat is coaxially arranged on the inner wall of the drilling machine outer cylinder, one end of the sealing valve clack is movably connected with the outer side wall of the upper end of the valve seat, and the top of the valve seat is provided with a valve port sealing surface matched with the sealing valve clack; the core sample fidelity cabin comprises an inner core taking barrel, an outer core taking barrel and an energy accumulator, wherein the outer core taking barrel is sleeved on the inner core taking barrel, the upper end of the inner core taking barrel is communicated with a liquid nitrogen storage tank, the liquid nitrogen storage tank is positioned in the outer core taking barrel, the energy accumulator is communicated with the outer core taking barrel, and the outer core taking barrel is provided with a flap valve;

the outer cylinder unlocking mechanism of the drilling machine comprises a connecting pipe, an outer cylinder and a lock pin, wherein the connecting pipe, the outer cylinder and the lock pin are coaxial, the lock pin is arranged in the connecting pipe, the outer diameter of the front section of the connecting pipe is smaller than the inner diameter of the outer cylinder, a through hole A is formed in the side wall of the front section of the connecting pipe, the outer wall of the lock pin is provided with a groove A, the inner wall of the outer cylinder is provided with a groove B, the lock pin also comprises a pin, the length of the pin is larger than the depth of the through hole A, the pin is arranged in the through hole A, the outer end of the pin is chamfered and/or the side surface of the groove B is an inclined surface, the width of the groove A is not less than the width of the inner end of the pin, the width of the groove B is not less than the width of the outer end of the pin, before starting, the front end of the connecting pipe is arranged in the outer cylinder, the pin is arranged in front of the groove A, the inner end surface of the pin is in sliding fit with the outer wall of the lock pin, the outer end of the pin is embedded in the, the inner end of the pin is embedded into the groove A, and the distance from the inner end face of the pin to the inner wall of the outer barrel is larger than the length of the pin.

2. The rock sample in-situ fidelity coring system of claim 1, wherein: core sample fidelity cabin still includes electric heater, temperature sensor, locates interior core barrel and the liquid nitrogen storage jar between automatically controlled valve, pressure sensor, locate the energy storage ware and the outer three-way stop valve A of core barrel between, energy storage ware and outer core barrel are connected respectively to two ports of three-way stop valve A, and the relief valve is connected to three-way stop valve A's third port, and three-way stop valve A is automatically controlled valve, temperature sensor, pressure sensor connect the processing unit, electric heater, automatically controlled valve, three-way stop valve A all are controlled by the processing unit, electric heater is used for external core barrel internal heating, temperature sensor is used for detecting the temperature in the fidelity cabin, pressure sensor is used for detecting the pressure in the fidelity cabin.

3. The rock sample in-situ fidelity coring system of claim 1, wherein: the drill bit includes the first order blade that is used for drilling and is used for reaming second level blade, and the drill bit includes interior drill bit and outer drill bit, interior drill bit is installed in outer drill bit, and the first order blade is located interior drill bit lower extreme, and the second level blade is located outer drill bit lateral wall, the first order blade is equipped with threely at circumferencial direction equidistant, and the second level blade is equipped with threely at circumferencial direction equidistant, and first order blade and second level blade department all are equipped with coolant liquid return circuit hole on the drill bit.

4. The rock sample in-situ fidelity coring system of claim 1, wherein: the outer core tube and the outer wall of the drill bit are both provided with spiral grooves, and the spiral grooves on the drill bit are continuous with the spiral grooves on the outer core tube.

5. The rock sample in-situ fidelity coring system of claim 1, wherein: the jack catch includes vertical arm and the slope arm of integrative manufacturing, vertical arm lower extreme is connected with the annular base member, and vertical arm upper end is connected with the lower extreme of slope arm, and the upper end of slope arm is the free end, and up leanin is followed to the slope arm, and the angle of inclination of slope arm is 60.

6. The rock sample in-situ fidelity coring system of claim 1, wherein: the sealing valve clack comprises an elastic sealing ring, an elastic connecting strip, a sealing element and a plurality of locking strips which are sequentially arranged in parallel, the elastic connecting strip connects all the locking strips in series and hoops all the locking strips together by the elastic sealing ring to form an integral structure, a clamping groove matched with the elastic sealing ring is formed in each locking strip, the elastic sealing ring is arranged in each clamping groove, the sealing element is arranged between every two adjacent locking strips, and one end of the valve clack is movably connected to the upper end of the valve seat through a limiting hinge; the valve clack is arc-shaped when not turned down, and is attached to the outer wall of the inner coring barrel; the valve clack is plane when turning down and covers the upper end of the valve seat.

7. The rock sample in-situ fidelity coring system of claim 1, wherein: the inner wall of the outer coring barrel is provided with a sealing cavity, the turning plate is positioned in the sealing cavity, and the sealing cavity is communicated with the inner coring barrel; and a sealing ring is arranged on the inner wall of the outer coring barrel and is positioned below the flap valve.

8. The rock sample in-situ fidelity coring system of claim 2, wherein: the electric heater is a resistance wire which is embedded in the inner wall of the outer coring barrel, and the resistance wire is coated with an insulating layer; the graphene layer is attached to the inner wall of the inner coring barrel; the upper part of the inner coring barrel is filled with a dripping film forming agent.

9. The rock sample in-situ fidelity coring system of claim 1, wherein: interlocking device is connected at the connecting pipe rear, actuating mechanism is connected at the lockpin rear, recess A side is the inclined plane, drill bit and hydraulic motor rotor are connected in urceolus the place ahead, the lockpin rear even has retaining member A, the connecting pipe rear even has retaining member B, and retaining member A external diameter is greater than retaining member B internal diameter, and retaining member A is in retaining member B rear, pin outer end chamfer and radial cross section contained angle and recess B side are each other with radial cross section's contained angle, the pin includes pin fin and nail body, and through-hole A is equipped with nail head section and nail body section correspondingly.

10. The rock sample in-situ fidelity coring system of claim 9, wherein: the length of the nail head is smaller than the depth of the nail head section, and the length of the nail body is larger than the depth of the nail body section; the through-hole A is the round hole, and through-hole A has 3, and the axial distance that through-hole A hole center was the same to the connecting pipe front end, 3 through-hole A along circumference evenly distributed.