CN2617915Y

CN2617915Y - Preserved sampling drill

Info

Publication number: CN2617915Y
Application number: CN 03245568
Authority: CN
Inventors: 张永勤; 陈修星; 刘辉; 孙建华; 田志坤
Original assignee: Institute of Exploration Technology Chinese Academy of Geological Sciences
Current assignee: Institute of Exploration Technology Chinese Academy of Geological Sciences
Priority date: 2003-04-22
Filing date: 2003-04-22
Publication date: 2004-05-26
Anticipated expiration: 2013-04-22

Abstract

The utility model discloses a fidelity sampling drilling tool which keeps drilling samples the original temperature and pressure, makes the sampling test truer and avoids causing severe natural disasters. An inner tube assembly is connected and positioned by an outer tube through a latching system, a hanging system and a righting ring. A fishing tool with a fishing hook is arranged on the top of spearhead; a pressure injecting hole with a one-way valve and a continuous action axis with a pressure compensating hole, a piston and a pressure relief opening hole are arranged in the inner latching frame of the inner tube assembly; a high pressure cavity, a safety valve and a pressure relief opening hole is arranged on the cylinder liner on the relative location of the inner latching frame. An electronic cooling device which comprises a heat preservation layer and a power refrigerator in the heat dissipating layer and the liner is arranged between the inner latching frame and a core accommodating tube. The utility model is applicable to geological exploration, in particular to the exploration of new human energy-natural gas hydrate.

Description

The fidelity sampling drilling tool

Technical field

The utility model relates to a kind of fidelity sampling drilling tool that is used for geological prospecting.It is specially adapted to human novel energy---the exploration of gas hydrates.

Background technology

Existing oil drilling Sampling driller is to adopt freezing and airtight mode to extract to bore the core product.There is the temperature and pressure variation problem greatly on the core stratum former of taking-up with it.

Summary of the invention

The utility model has overcome deficiency of the prior art, and a kind of fidelity sampling drilling tool is provided.

In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions: it is by playing the block head, outer tube and drill bit are formed outer pipe assembly, spearhead is connected with outer recovery tube by external elastic cartridge frame, outer recovery tube is connected with interior recovery tube by the following bullet mechanism for card on the inner elastic cartridge frame, interior recovery tube connects to form inner tube assembly by the locking positioning bar and the core containing pipe of dribbling valve, inner tube assembly is by playing mechanism for card, hitch is connected with outer tube with centering ring and locatees, the fisher of band recovery hook is housed on spearhead top, the notes that have the band one way valve on the inner elastic cartridge frame are pressed the hole, the band pressure compensation holes is housed, the couple axle of piston and release through hole, with have high pressure chest on the cylinder sleeve of its relevant position, safety valve and release through hole, between inner elastic cartridge frame and core containing pipe electronic refrigeration plant is housed, it is that insulation layer and power supply refrigerator composition are housed in heat dissipating layer and liner.

Compared with prior art, the beneficial effects of the utility model are: make and bore the control sampling and keep original temperature and original pressure, with making the test of sampling more true, can also avoid causing simultaneously serious natural calamity.

Description of drawings

Fig. 1 is mechanism's generalized section on the utility model top;

Fig. 2 is mechanism's generalized section at the utility model middle part;

Fig. 3 is mechanism's generalized section of the utility model bottom;

Fig. 4 is the fisher section enlarged diagram in the utility model head tube;

Fig. 5 is the utility model electronic refrigeration plant section enlarged diagram;

Fig. 6 is the A-A generalized section of Fig. 5;

Fig. 7 is the B-B generalized section of Fig. 5.

The specific embodiment

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:

Drilling tool is pipe assembly and inner tube assembly exceptionally.Outer pipe assembly is made up of bullet block head 1, outer tube 22, drill bit 29; Inner tube assembly by from spearhead 2 to jump ring and clip spring seat 28 interior sections form.Before beginning to creep into, the outer pipe assembly of drilling tool is connected with drill string on the rig by playing block head 1 upper end screw thread.Inner tube assembly is connected with outer pipe assembly by upper end bullet mechanism for card 3, hitch 9, centering ring 24 and locatees.Before beginning to creep into, outside can be earlier inner tube assembly being contained in inner tube assembly earlier on the face of land or deck in the pipe assembly, and cooperation puts in place, also outside pipe assembly be connected on the drilling rod and down at the bottom of the hole after again from the face of land or the deck at the bottom of the drilling rod SMIS is rendered to the hole with inner tube assembly, and match with outer pipe assembly by hitch.After inner tube assembly puts in place, can begin to creep into.Before inner tube assembly is thrown in the hole, press hole 10, one way valve 11 to inject gases at high pressure by annotating in pressure compensator and the high pressure chest 12 on the face of land.In the drilling process, pressure compensator and high pressure chest 12 do not communicate with core containing pipe 25.Electronic refrigeration plant 20 is installed in the upper end of core containing pipe 25, and electronic refrigeration plant 20 is made up of power supply and refrigerator 20-1, insulation layer 20-2, aluminium matter heat dissipating layer 20-3, liner copper layer 20-4, stainless steel intermediate layer 20-5, middle aluminium lamination 20-6, outside stainless protection layer 20-7.Refrigerating plant is not freezing in the launch process in the hole with inner tube assembly.The power of refrigerating plant provides by being installed in its inner lithium battery group power supply 20-1.Delay switch is equipped with in electronic refrigerator inside, and delay switch can be controlled the start-up time of electronic refrigeration plant.When beginning to creep into, electronic refrigerator begins to start refrigeration according to preset time, and keeps core containing pipe inside to reach the temperature of being set up.In order to keep core containing pipe temperature inside, core containing pipe periphery is provided with heat-insulation and heat-preservation pipe 23.Along with the carrying out that creeps into, core begins to form and enter core containing pipe 25.When core reaches certain-length or be full of core containing pipe 25 and need get core, utilize the wire line coring winch fisher assembly 31 to be rendered to the hole by deadweight in drilling rod from the aperture at the bottom of.The structure design of fisher assembly 31 can make that recovery hook 32 catches inner tube assembly upper end automatically drag for spearhead 2.When the recovery hook 32 of fisher assembly 31 catch drag for spearhead 2 after, the rope winch that starts on the face of land or the deck promotes fisher.Along with carrying on the fisher assembly 31, an interior recovery tube 7 of 2 drives that gives of inner tube assembly at first forces down 6 contractions and together up in company with inner elastic cartridge frame 8 of bullet mechanism for card.This moment, couple axle 18 drive refrigeration top connections 19, refrigeration mechanism 20, core containing pipe 25, clip spring seat and the core jump ring 28 of inner tube assembly were up, and core is pulled off and remains in the core containing pipe 25.When interior recovery tube is up to certain stroke, have axially between cylinder sleeve 16 and the couple axle 18 and relatively move, the distance that both axially relatively move makes that just in time the pressure compensation holes 14 on the inner tube assembly is communicated with pressure compensation high pressure chest 12, release through hole 17 is communicated with safety valve 13, and reaches top dead center position.Meanwhile, the lower end of core clip spring seat 28 also has been up to the upper end of ball valve 27, and leaves spheroid.And this moment, the locking positioning bar 26 on the ball valve 27 also was up to the disengagement locked position, and this moment, ball valve 27 made spheroid rotate 90 ° and the lower end of inner tube assembly is closed automatically by the convergent force of spring 30.After closing ball valve 27, core containing pipe 25 inner chambers on the inner tube assembly and each through hole of upper end thereof do not communicate with the external world yet, so keep original pressure and temperature desired in the core containing pipe 25.Constantly up along with fisher, outer recovery tube 5 also up and drive in recovery tube 7 bullet mechanism for card 6 is retracted to can upward position, force and play the axial restriction that mechanism for card 3 contractions are not played block head 1, external elastic cartridge frame 4 is also up thereupon, thereby makes from spearhead 2, annotate and press hole 10, cylinder sleeve 16, intervalve 21, ball valve 27 and whole inner tube assemblies such as jump ring and clip spring seat 28 are up and break away from hitch 9 and couple axle 18.Drill bit 29, outer tube 22 and bullet block head 1 are stayed at the bottom of the hole.In the up process of whole inner tube assembly, if 25 li pressure of core containing pipe leak, 12 li gases at high pressure of high pressure chest will promote piston 15 by pressure compensation holes 14 and exert pressure for 25 li to the core container cavity, thereby keep the reset pressure of 25 li of core container cavities.

Claims

1, a kind of fidelity sampling drilling tool that is used for geological prospecting, be by playing block head (1), outer tube (22) and drill bit (29) are formed outer pipe assembly, be connected with outer recovery tube (5) by external elastic cartridge frame (4) by spearhead (2), outer recovery tube (5) is connected with interior recovery tube (7) by the following bullet mechanism for card (6) on the inner elastic cartridge frame (8), interior recovery tube (7) connects to form inner tube assembly by the locking positioning bar (26) of dribbling valve (27) with core containing pipe (25), inner tube assembly is by playing mechanism for card (3), hitch (9) is connected with outer tube (22) with centering ring (24) and locatees, the fisher (31) of band recovery hook (32) is housed on spearhead (2) top, it is characterized in that having on the inner elastic cartridge frame (8) the notes pressure hole (10) of band one way valve (11), band pressure compensation holes (14) is housed, the couple axle (18) of piston (15) and release through hole (17), with have high pressure chest (12) on the cylinder sleeve (16) of its relevant position, safety valve (13) and release through hole (17), between inner elastic cartridge frame (8) and the core containing pipe (25) electronic refrigeration plant (20) is housed, it is that insulation layer (20-2) and power supply refrigerator (20-1) composition are housed in heat dissipating layer (20-3) and liner (20-4).