CN208456507U - The drilling well close reamer in high hole - Google Patents
The drilling well close reamer in high hole Download PDFInfo
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- CN208456507U CN208456507U CN201820851011.4U CN201820851011U CN208456507U CN 208456507 U CN208456507 U CN 208456507U CN 201820851011 U CN201820851011 U CN 201820851011U CN 208456507 U CN208456507 U CN 208456507U
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Abstract
The utility model relates to a kind of drilling well close reamers in high hole, including the reaming top connection and reaming lower contact being mutually screwed on, the lower end of reaming lower contact is screwed with transmission detonation joint, the lower end of transmission detonation joint is screwed with the reaming rifle extended downwardly, the lower end of reaming rifle is screwed with gun breech, and the lower end of gun breech is equipped with taper guide head；Multiple blind holes are evenly distributed on the gun barrel of reaming rifle, reaming rifle lumen centers are equipped with firing mount, it is evenly distributed on firing mount and the one-to-one reaming bullet of blind hole on reaming rifle, the center of firing mount is equipped with the primacord for igniting each reaming bullet, the lower end of primacord is fixed on the lower end of firing mount, and the upper end of primacord is inserted into the centre bore of transmission detonation joint；The inner cavity of transmission detonation joint, which is equipped with, can ignite the detonating primer of primacord, and the inner cavity lower part of reaming lower contact is equipped with the initiator for igniting detonating primer, the inner cavity of reaming top connection be equipped with can percussion primer pressure blasting device.The drilling well is fast with the reaming speed of the close reamer in high hole, and reaming effect is good and underground risk is low.
Description
Technical field
The utility model relates to a kind of oil drilling reaming utensil, in particular to a kind of drilling well close reamer in high hole belongs to
In technical field of oil drilling equipment.
Background technique
In petroleum drilling operation, Creep of gypsum and extruding can cause hole shrinkage, bit freezing, setting of casing difficulty, well cementation matter
It measures difference and squeezes and ruin casing etc., cause serious drilling failure.When boring chance saline bed stratum, conventional way is to take early open
The method that pump, evening pluck pump, diligent reaming, strict control drilling speed, and increase drilling fluid density, prevent saline bed compacted by pressure difference
Become, but all cannot fundamentally solve the above hidden danger.More safe way is to expand saline bed well using underreamer technology
The wellbore of section, to increase cement thickness, improves cementing quality and guarantor to offset displacement caused by Creep of gypsum
Casing is protected.In addition, bore meet easily leakage, easily collapse, the bad grounds such as easy undergauge when, need to implement expansion tube closure intricately
Layer construction；Or by casing programme, casing size is limited and needs the large-sized casing of tripping at the middle and upper levels, is also required to above to being bored
Well section carries out ream operation.
Traditional ream operation method generallys use reaming and Double Circular Bit after Waterpower hydraulic pressure reamer is bored and carries out with brill
Reaming.Top in Waterpower hydraulic pressure reamer body is equipped with a piston, and top land is connected with spring.Reamer is in the spare time
When setting state, reaming wing is retracted in ontology；When needing to carry out reaming hole operation, that is, increase drilling well flow velocity, cleaner for high-pressure drilling fluid
Form certain pressure difference by throttling set, pressure difference pushes piston to do the movement of compressed spring, while the rack gear of piston with
Gear engagement on reaming hole body, opens cornish bit chord, realizes reaming drilling.Double Circular Bit is by pilot bit and reaming wing two
Part forms, and neck eye portion is almost the same with conventional bit structure, and the bottom in pit shaft when drilling can drill out a diameter
Lesser neck eye；Reaming wing is the prism structure with cutting edge, the side of circumferentially disposed Double Circular Bit, usually only
It is distributed within the scope of quarter turn, energy high-ranking military officer's eye expands as the wellbore of technique desired size.
Due to being influenced by reaming formation compaction intensity, formation hardness and wellbore hole deviation, conventional hydraulic hydraulic underreamer into
After row bores reaming there are the reamer breaking wing, pore-enlargement is long, reaming torque is big, drilling tool risk is high, reaming effect is poor the problems such as.
Double Circular Bit carries out enlarging while drilling there are pore-enlargements the problems such as long, reaming torque is big, bit life is short.Especially leakage,
Ream operation is carried out in the stratum easily to collapse, difficulty is larger, and risk is higher, and reaming precision not can guarantee sometimes, this is largely
On limit drillng operation next step construction.
Utility model content
The purpose of this utility model is that overcoming problems of the prior art, provide a kind of drilling well high Kong Mikuo
Hole device, reaming speed is fast, and reaming effect is good and underground risk is low.
In order to solve the above technical problems, a kind of drilling well of the utility model close reamer in high hole, including what is be mutually screwed on
The inner cavity top of reaming top connection and reaming lower contact, the reaming top connection is equipped with reaming top connection box thread, the reaming
The lower end of lower contact is screwed with transmission detonation joint, and the lower end of the transmission detonation joint is screwed with the reaming rifle extended downwardly, the reaming
The lower end of rifle is screwed with gun breech, and the lower end of the gun breech is equipped with taper guide head；It is evenly distributed on the gun barrel of the reaming rifle
Multiple blind holes, the reaming rifle lumen centers are equipped with firing mount, are evenly distributed with and the blind hole on the reaming rifle on the firing mount
It corresponds and the reaming bullet of coaxial line, the center of the firing mount is equipped with the primacord for igniting each reaming bullet, the primacord
Lower end is fixed on the lower end of the firing mount, and the upper end of the primacord is inserted into the centre bore of the transmission detonation joint；The propagation of explosion
The inner cavity of connector is equipped with the detonating primer that can ignite primacord, and the inner cavity lower part of the reaming lower contact, which is equipped with, ignites the propagation of explosion
The initiator of pipe, the inner cavity of the reaming top connection are equipped with the pressure blasting device that can hit the initiator；The propagation of explosion
The inner cavity of connector is equipped with supporting positive cover, and the centre bore top of the supporting positive cover is equipped with the detonating primer, the center of the supporting positive cover
Small lower big structure is presented in hole, and the centre bore that the supporting positive cover is inserted into the upper end of the primacord is connected with the detonating primer.
Compared with the existing technology, the utility model achieves following the utility model has the advantages that under the guiding neck eye effect of gun breech, expands
Hole rifle is lowered with drilling rod to scheduled reaming position, is then turned on slush pump and is pressurizeed to drilling rod inner cavity, the pressure of drilling fluid makes
The initiator of lower section, the shock wave initiation detonating primer and primacord of initiator output, primacord are hit in the unlock of pressure blasting device
Built-in insensitiveness high explosive, explosion velocity are up to 7800m/s, each reaming bullet heavy explosion in moment reaming rifle, the blind hole on reaming rifle
It is blown, the shock wave for generation of exploding causes the formation rock of this section of circle to crush and rupture in rock of borehole, from
And achieve the effect that reaming；Then slush pump is opened to operational discharge capacity, landwaste caused by explosion reaming is carried out into ground, so
Hole diameter is detected by cable tripping in caliper logging tool afterwards, judges whether to meet scheduled reaming requirement.The centre bore of supporting positive cover is in
Up-small and down-big structure, convenient for the insertion of primacord；The structure of detonating primer is simpler, so that propagation of explosion component is easier for installation
Fast.The device do not need rotary tools and start other power-equipments, no down-hole equipment risk, may be implemented fixed point, quickly,
Safe and efficient, inexpensive down-hole, and it is easy to operate.
As the improvement of the utility model, the reaming bullet includes shell case, and the shell case is directed toward the inner end of reaming gun axis line
Head is in truncated cone, and the inner termination of the shell case is equipped with shell case propagation of explosion centre bore, is filled with expansion in the shell case propagation of explosion centre bore
Hole bullet booster explosive, the inner cavity of the shell case are equipped with cavity liner, the cavity liner be taper and with the shell case coaxial line, the medicine
Type cover is the axis that the vertex of a cone is perpendicularly oriented to reaming rifle, and the main dress of reaming bullet is filled between the cavity liner and the inner wall of the shell case
Medicine, the vertex of a cone of the reaming bullet main charge are connected to each other with the reaming bullet booster explosive.Primacord ignites reaming bullet booster explosive, expands
Hole bullet booster explosive ignites reaming bullet main charge, cavity liner is blown, the shock wave for generation of exploding fries the blind hole on reaming rifle
It opens, and acts in rock of borehole, realize the purpose of reaming.
As the improvement of the utility model, the pressure blasting device includes being located at reaming top connection inner cavity lower part
Perforated baffle and striker, the perforated baffle are located at the lower section of the reaming top connection box thread, and the striker is located at described open
The lower section of hole baffle and extended downwardly along the centre bore of the reaming top connection, the periphery of the striker by O-ring with it is described
Reaming top connection centre bore realizes sealing；The lower end of the striker is inserted into the inner cavity of the reaming lower contact, the striker
Shear pin is plugged on lower circumferential, the external end head of the shear pin is inlaid in striker bushing, the lower end of the striker bushing
It is supported on the step of the reaming lower contact, the upper end of the striker bushing is resisted against under the lower end surface of the reaming top connection
Side；The lower end tip of the striker is directed at the upper end center of the initiator.Striker is fixed on striker bushing and expansion by shear pin
In the centre bore of hole top connection, striker bushing be fixed on reaming top connection lower end surface and reaming lower contact interior step it
Between, prevent striker during going into the well since gravity moves down；Shear pin have certain intensity in case pipe string vibration when
Damage, and can reliably be cut under the shear pressure of design.When slush pump is forced into setting value to drilling rod inner cavity, shear pin
It is cut, striker fast downlink, the lower end tip high-speed impact initiator of striker, which is ignited, generates shock wave.
As a further improvement of the utility model, the bore seal of the initiator be filled with detonating charge, described
The upper end of quick-fried device is located in the centre bore of the reaming lower contact, and the lower end of the initiator is plugged in the counterbore of plug screw, institute
The periphery for stating plug screw is screwed in the lower end screw hole of the reaming lower contact, and the bottom centre of the plug screw is equipped with plug screw centre bore
It connects with the plug screw counterbore.Plug screw is screwed in the screw hole of reaming lower contact upwards from below and fixes initiator, detonation
Device, which is under pressure after the striker impact of priming device, to be ignited, detonating primer of the shock wave from the plug screw centre bore of plug screw bottom downwards
Transmitting.
The center bore inner wall of the reaming top connection is equipped with top connection inner ring as a further improvement of the utility model,
Slot, the top connection inner groove are looped around the top periphery of the striker, are symmetrically arranged with and connect in the reaming top connection
Head radial hole connects with the top connection inner groove.When striker is in non-unlocked state, drilling fluid, that is, mud of drilling rod inner cavity
It is sealed up by the O-ring of striker periphery；When slush pump is forced into setting value, shear pin is cut, and striker fast downlink is hit
Initiator, top connection radial hole exposes at this time, and the drilling fluid of drilling rod inner cavity is flowed out from top connection inner groove and top connection radial hole,
There are big ups and downs in the pressure of slush pump, and construction personnel learns that explosion has been realized in underground by the fluctuation of mud pump pressure on well
Reaming.
Countersunk head spiral shell is symmetrically screwed on the top circumference of the reaming lower contact as a further improvement of the utility model,
Nail, the inner termination of the sunk screw are respectively inserted into the annular recess of the reaming top connection periphery wall.Sunk screw can
To prevent reaming top connection and reaming lower contact from loosening during going into the well.
As a further improvement of the utility model, on the gun barrel of the reaming rifle every meter be equipped with 120 blind holes, respectively
Multi-head spiral line of the blind hole along gun barrel surface is uniformly distributed, and number of phases of the blind hole on gun barrel is 18, same cross section
On two neighboring blind hole between phase angle be 140 °.It is close using superelevation hole on gun barrel, it ensure that penetration depth and perforation hole
Diameter；Blind hole and reaming bullet are distributed along multi-head spiral line, and the phase angle between two neighboring blind hole is 140 °, solve charge interference
The problem of.
The upper and lower ends of the firing mount are separately fixed at the center of positioning disk as a further improvement of the utility model,
Gun barrel inner wall clearance fit of the periphery of the positioning disk respectively at the reaming rifle, the upper and lower ends point of the reaming rifle inner wall
The hole retaining ring of axially position She You not be carried out to positioning disk, it is fixed to be fixed with respectively by screw on the outer end face of the positioning disk
Bit slice, the external end head of the locating plate are embedded in respectively in the inboard wall groove of the reaming rifle.The positioning disk of upper and lower ends ensures bullet
Frame and reaming rifle coaxial line, hole carry out axially position to firing mount with retaining ring, and locating plate carries out radial positioning to firing mount, it is ensured that every
A reaming bullet and blind hole coaxial line corresponding on gun barrel, so that explosion wave plays maximum reaming effect.
The cone-apex angle of the cavity liner is 38 ° ~ 52 ° as a further improvement of the utility model, the wall of the cavity liner
Thickness is 0.5 ~ 3mm；The diameter of the shell case propagation of explosion centre bore is Φ 2.5mm ~ Φ 5mm, and length is 20mm ~ 30mm.
Detailed description of the invention
Fig. 1 is the main view of the utility model drilling well close reamer in high hole.
Fig. 2 is the enlarged drawing at pressure blasting device position in Fig. 1.
Fig. 3 is the cross-sectional view of reaming bullet in Fig. 1.
Fig. 4 is the enlarged drawing at the position A in Fig. 1.
In figure: 1. reaming top connections；1a. reaming top connection box thread；1b. top connection inner groove；1c. top connection is radial
Hole；2. reaming lower contact；2a. sunk screw；3. transmission detonation joint；4. reaming rifle；4a. firing mount；4b. primacord；4c. positioning disk；
4d. locating plate；5. gun breech；6. pressure blasting device；6a. perforated baffle；6b. striker；6c. shear pin；6d. striker bushing；7.
Initiator；8. plug screw；8a. plug screw centre bore；9. detonating primer；10. supporting positive cover；11. reaming bullet；11a. shell case；11b. reaming bullet
Booster explosive；11c. reaming bullet main charge；11d. cavity liner.
Specific embodiment
As shown in Figures 1 to 4, the drilling well of the utility model includes the reaming top connection being mutually screwed on the close reamer in high hole
1 and reaming lower contact 2, the inner cavity top of reaming top connection 1 is equipped with reaming top connection box thread 1a, the lower end of reaming lower contact 2
It is screwed with transmission detonation joint 3, the lower end of transmission detonation joint 3 is screwed with the reaming rifle 4 extended downwardly, and the lower end of reaming rifle 4 is screwed with rifle
The lower end of tail 5, gun breech 5 is equipped with taper guide head；Multiple blind holes are evenly distributed on the gun barrel of reaming rifle 4, in 4 inner cavity of reaming rifle
The heart is equipped with firing mount 4a, and the reaming bullet 11 with blind hole one-to-one correspondence and coaxial line on reaming rifle 4, bullet are evenly distributed on firing mount 4a
The center of frame 4a is equipped with the primacord 4b for igniting each reaming bullet 11, and the lower end of primacord 4b is fixed on the lower end of firing mount 4a, leads quick-fried
In the centre bore of the upper end insertion transmission detonation joint 3 of rope 4b；The inner cavity of transmission detonation joint 3 is equipped with the detonating primer 9 that can ignite primacord 4b,
The inner cavity lower part of reaming lower contact 2 is equipped with the initiator 7 for igniting detonating primer 9, and the inner cavity of reaming top connection 1, which is equipped with, to hit
The pressure blasting device 6 of initiator 7.
Pressure blasting device 6 includes the perforated baffle 6a and striker 6b positioned at 1 inner cavity lower part of reaming top connection, perforated baffle
6a is located at the lower section of reaming top connection box thread 1a, and striker 6b is located at the lower section of perforated baffle 6a and along reaming top connection 1
Heart hole extends downwardly, and the periphery of striker 6b is realized by O-ring and reaming top connection centre bore to be sealed；The lower end of striker 6b is inserted into
In the inner cavity of reaming lower contact 2, shear pin 6c is plugged on the lower circumferential of striker 6b, the external end head of shear pin 6c, which is inlaid in, to be hit
In Needle sleeve 6d, the lower end of striker bushing 6d is supported on the step of reaming lower contact 2, and the upper end of striker bushing 6d is resisted against expansion
Below the lower end surface of hole top connection 1；The upper end center of the lower end tip alignment initiator 7 of striker 6b.
Striker 6b is fixed in striker bushing 6d and the centre bore of reaming top connection 1 by shear pin 6c, striker bushing 6d quilt
Be fixed between the lower end surface of reaming top connection 1 and the interior step of reaming lower contact 2, prevent striker 6b during going into the well due to
Gravity moves down；Shear pin 6c has certain intensity in order to avoid damaging in the vibration of pipe string, and can be in the shearing pressure of design
It is reliably cut under power.When slush pump is forced into setting value to drilling rod inner cavity, shear pin 6c is cut, striker 6b fast downlink,
The lower end tip high-speed impact initiator 7 of striker 6b, which is ignited, generates shock wave.
The bore seal of initiator 7 is filled with detonating charge, and the upper end of initiator 7 is located at the centre bore of reaming lower contact 2
In, the lower end of initiator 7 is plugged in the counterbore of plug screw 8, and the periphery of plug screw 8 is screwed in the lower end screw hole of reaming lower contact 2,
The bottom centre of plug screw 8 is equipped with plug screw centre bore 8a and connects with plug screw counterbore.Plug screw 8 is screwed under reaming upwards from below and connects
It is in first 2 screw hole that initiator 7 is fixed, initiator 7 be under pressure priming device 6 striker 6b hit after ignite, shock wave from
The detonating primer 9 of the plug screw centre bore 8a of 8 bottom of plug screw downwards transmits.
The center bore inner wall of reaming top connection 1 is equipped with top connection inner groove 1b, and top connection inner groove 1b is looped around striker 6b
Top periphery, be symmetrically arranged with top connection radial hole 1c and top connection inner groove 1b in reaming top connection 1 and connect.Striker
When 6b is in non-unlocked state, drilling fluid, that is, mud of drilling rod inner cavity is sealed up by the O-ring of the periphery striker 6b；When slush pump plus
When being depressed into setting value, shear pin 6c is cut, striker 6b fast downlink percussion primer 7, and top connection radial hole 1c exposes at this time,
The drilling fluid of drilling rod inner cavity is flowed out from top connection inner groove 1b and top connection radial hole 1c, and violent wave occurs in the pressure of slush pump
Dynamic, construction personnel learns that explosion reaming has been realized in underground by the fluctuation of mud pump pressure on well.
Sunk screw 2a is symmetrically screwed on the top circumference of reaming lower contact 2, the inner termination of sunk screw 2a is inserted respectively
Enter in the annular recess of 1 periphery wall of reaming top connection.Sunk screw 2a can prevent reaming top connection 1 and reaming lower contact 2
It is loosened during going into the well.
The inner cavity of transmission detonation joint 3 is equipped with supporting positive cover 10, and the centre bore top of supporting positive cover 10 is equipped with detonating primer 9, supporting positive cover
10 centre bore presents small lower big structure, and the centre bore of the upper end insertion supporting positive cover 10 of primacord 4b is connected with detonating primer 9.Righting
The centre bore of set 10 presents small lower big structure, convenient for the insertion of primacord 4b；The structure of detonating primer 9 is simpler, so that propagation of explosion
Component it is easier for installation quick.
Reaming bullet 11 includes shell case 11a, and the inner termination that shell case 11a is directed toward reaming gun axis line is in truncated cone, shell case 11a's
Inner termination is equipped with shell case propagation of explosion centre bore, is filled with reaming bullet booster explosive 11b, the inner cavity of shell case 11a in shell case propagation of explosion centre bore
Equipped with cavity liner 11d, cavity liner 11d be taper and with shell case 11a coaxial line, cavity liner 11d is that the vertex of a cone is perpendicularly oriented to reaming rifle 4
Axis, reaming bullet main charge 11c, the cone of reaming bullet main charge 11c are filled between cavity liner 11d and the inner wall of shell case 11a
Top is connected to each other with reaming bullet booster explosive 11b.Primacord 4b ignites reaming bullet booster explosive 11b, and reaming bullet booster explosive 11b is by reaming
It plays main charge 11c to ignite, cavity liner 11d be blown, the shock wave for generation of exploding blows the blind hole on reaming rifle 4, and makees
With the purpose in rock of borehole, realizing reaming.
The upper and lower ends of firing mount 4a are separately fixed at the center of positioning disk 4c, and the periphery of positioning disk 4c is respectively at reaming rifle 4
Gun barrel inner wall clearance fit, the upper and lower ends of reaming rifle inner wall be respectively equipped with to positioning disk 4c carry out axially position hole keeps off
It encloses, locating plate 4d is fixed with by screw respectively on the outer end face of positioning disk 4c, the external end head of locating plate 4d is embedded in reaming respectively
In the inboard wall groove of rifle 4.The positioning disk 4c of upper and lower ends ensures firing mount 4a and 4 coaxial line of reaming rifle, and hole retaining ring is to firing mount 4a
Axially position is carried out, locating plate 4d carries out radial positioning to firing mount 4a, it is ensured that each reaming bullet 11 and blind hole corresponding on gun barrel
Coaxial line, so that explosion wave plays maximum reaming effect.
120 blind holes are equipped with for every meter on the gun barrel of reaming rifle 4, and multi-head spiral line of each blind hole along gun barrel surface uniformly divides
Cloth, number of phases of the blind hole on gun barrel are 18, and the phase angle between two neighboring blind hole on same cross section is 140 °.Rifle
It is close using superelevation hole on pipe, it ensure that penetration depth and piercing aperture；Blind hole and reaming bullet 11 are distributed along multi-head spiral line, adjacent
Phase angle between two blind holes is 140 °, solves the problems, such as charge interference.
The cone-apex angle of cavity liner 11d is 38 ° ~ 52 °, and the wall thickness of cavity liner 11d is 0.5 ~ 3mm；Shell case propagation of explosion centre bore
Diameter is Φ 2.5mm ~ Φ 5mm, and length is 20mm ~ 30mm.
Under the guiding neck eye effect of gun breech 5, reaming rifle 4 is lowered with drilling rod to scheduled reaming position, is then turned on
Slush pump pressurizes to drilling rod inner cavity, and the pressure of drilling fluid unlocks pressure blasting device 6, hits the initiator 7 of lower section, initiator
The shock wave initiation detonating primer 9 and primacord 4b of 7 outputs, the built-in insensitiveness high explosive of primacord 4b, explosion velocity are up to 7800m/s, wink
Between each 11 heavy explosion of reaming bullet in reaming rifle 4, the blind hole on reaming rifle 4 blown, and the shock wave for generation of exploding exists
In rock of borehole, the formation rock of this section of circle is caused to crush and rupture, to achieve the effect that reaming；Then by slush pump
It opens to operational discharge capacity, landwaste caused by explosion reaming is carried out into ground, is then detected by cable tripping in caliper logging tool
Hole diameter judges whether to meet scheduled reaming requirement.The device does not need rotary tools and starts other power-equipments, no underground
Fixed point, quick, safe and efficient, inexpensive down-hole may be implemented in drilling tool risk, and easy to operate.
The crust of primacord 4b is special plastic, and built-in high explosive is a kind of high explosion velocity primacord, and explosion velocity is up to 7800m/
s；The high explosive can be applied to downhole temperature no more than 160 DEG C, and down-hole pressure is no more than 70MPa, and the underground construction time does not surpass
It crosses in the environment of 48h；It is same that reaming bullet booster explosive 11b and reaming bullet main charge 11c flies performance.
The foregoing is merely the preferable possible embodiments of the utility model, patent that is non-therefore limiting to the utility model
Protection scope.In addition to the implementation, the utility model can also have other embodiments.It is all to use equivalent replacement or equivalent change
The technical solution to be formed is changed, is all fallen in the protection scope of the requires of the utility model.Technology of the utility model without description is special
Sign can realize that details are not described herein by or using the prior art.
Claims (9)
1. a kind of drilling well close reamer in high hole, including the reaming top connection and reaming lower contact being mutually screwed on, in the reaming
The inner cavity top of connector is equipped with reaming top connection box thread, it is characterised in that: the lower end of the reaming lower contact is screwed with propagation of explosion
Connector, the lower end of the transmission detonation joint are screwed with the reaming rifle extended downwardly, and the lower end of the reaming rifle is screwed with gun breech, described
The lower end of gun breech is equipped with taper guide head；Multiple blind holes, reaming rifle inner cavity are evenly distributed on the gun barrel of the reaming rifle
Center is equipped with firing mount, and the reaming with blind hole one-to-one correspondence and coaxial line on the reaming rifle is evenly distributed on the firing mount
Bullet, the center of the firing mount are equipped with the primacord for igniting each reaming bullet, and the lower end of the primacord is fixed under the firing mount
End, the upper end of the primacord is inserted into the centre bore of the transmission detonation joint；The inner cavity of the transmission detonation joint is equipped with to ignite and lead
The detonating primer of quick-fried rope, the inner cavity lower part of the reaming lower contact are equipped with the initiator for igniting the detonating primer, in the reaming
The inner cavity of connector is equipped with the pressure blasting device that can hit the initiator；The inner cavity of the transmission detonation joint is equipped with supporting positive cover,
The centre bore top of the supporting positive cover is equipped with the detonating primer, and the centre bore of the supporting positive cover presents small lower big structure, described
The centre bore that the supporting positive cover is inserted into the upper end of primacord is connected with the detonating primer.
2. the drilling well according to claim 1 close reamer in high hole, it is characterised in that: the reaming bullet includes shell case, institute
Stating shell case and being directed toward the inner termination of reaming gun axis line is in truncated cone, and the inner termination of the shell case is equipped with shell case propagation of explosion centre bore, institute
It states and is filled with reaming bullet booster explosive in shell case propagation of explosion centre bore, the inner cavity of the shell case is equipped with cavity liner, and the cavity liner is cone
Shape and with the shell case coaxial line, the cavity liner is that the vertex of a cone is perpendicularly oriented to the axis of reaming rifle, the cavity liner and the bullet
Reaming bullet main charge is filled between the inner wall of shell, the vertex of a cone of the reaming bullet main charge is opposite with the reaming bullet booster explosive
It connects.
3. the drilling well according to claim 1 close reamer in high hole, it is characterised in that: the pressure blasting device includes position
Perforated baffle and striker in reaming top connection inner cavity lower part, the perforated baffle are located at the reaming top connection box thread
Lower section, the striker is located at the lower section of the perforated baffle and extends downwardly along the centre bore of the reaming top connection, described
It is realized and is sealed by O-ring and the reaming top connection centre bore in the periphery of striker；The reaming is inserted into the lower end of the striker
In the inner cavity of lower contact, shear pin is plugged on the lower circumferential of the striker, the external end head of the shear pin is inlaid in striker
In bushing, the lower end of the striker bushing is supported on the step of the reaming lower contact, the upper end of the striker bushing against
Below the lower end surface of the reaming top connection；The lower end tip of the striker is directed at the upper end center of the initiator.
4. the drilling well according to claim 1 close reamer in high hole, it is characterised in that: the bore seal of the initiator is filled out
Filled with detonating charge, the upper end of the initiator is located in the centre bore of the reaming lower contact, and the lower end of the initiator is inserted
It connects in the counterbore of plug screw, the periphery of the plug screw is screwed in the lower end screw hole of the reaming lower contact, the bottom of the plug screw
Portion center is equipped with plug screw centre bore and connects with the plug screw counterbore.
5. the drilling well according to claim 3 close reamer in high hole, it is characterised in that: the centre bore of the reaming top connection
Inner wall is equipped with top connection inner groove, and the top connection inner groove is looped around the top periphery of the striker, in the reaming
Top connection radial hole is symmetrically arranged on connector to connect with the top connection inner groove.
6. the drilling well according to claim 1 close reamer in high hole, it is characterised in that: the top circle of the reaming lower contact
Sunk screw is symmetrically screwed on week, the inner termination of the sunk screw is respectively inserted into the ring of the reaming top connection periphery wall
In shape groove.
7. the drilling well according to claim 1 close reamer in high hole, it is characterised in that: every meter on the gun barrel of the reaming rifle
Equipped with 120 blind holes, multi-head spiral line of each blind hole along gun barrel surface is uniformly distributed, phase of the blind hole on gun barrel
Number is 18, and the phase angle between two neighboring blind hole on same cross section is 140 °.
8. the drilling well according to claim 1 close reamer in high hole, it is characterised in that: the upper and lower ends of the firing mount are distinguished
It is fixed on the center of positioning disk, gun barrel inner wall clearance fit of the periphery of the positioning disk respectively at the reaming rifle, the expansion
The upper and lower ends of hole rifle inner wall are respectively equipped with the hole retaining ring that axially position is carried out to positioning disk, on the outer end face of the positioning disk
Locating plate is fixed with by screw respectively, the external end head of the locating plate is embedded in respectively in the inboard wall groove of the reaming rifle.
9. the drilling well according to claim 2 close reamer in high hole, it is characterised in that: the cone-apex angle of the cavity liner is
38 ° ~ 52 °, the wall thickness of the cavity liner is 0.5 ~ 3mm；The diameter of the shell case propagation of explosion centre bore is Φ 2.5mm ~ Φ 5mm, long
Degree is 20mm ~ 30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820851011.4U CN208456507U (en) | 2018-06-04 | 2018-06-04 | The drilling well close reamer in high hole |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112228015A (en) * | 2020-10-26 | 2021-01-15 | 大庆油田有限责任公司 | Intelligent and safe perforator for cleaning pore |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112228015A (en) * | 2020-10-26 | 2021-01-15 | 大庆油田有限责任公司 | Intelligent and safe perforator for cleaning pore |
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