CN105353404B - A kind of nearly drill bit bump focus pipe nipple in gas drilling shaft bottom - Google Patents
A kind of nearly drill bit bump focus pipe nipple in gas drilling shaft bottom Download PDFInfo
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- CN105353404B CN105353404B CN201510871209.XA CN201510871209A CN105353404B CN 105353404 B CN105353404 B CN 105353404B CN 201510871209 A CN201510871209 A CN 201510871209A CN 105353404 B CN105353404 B CN 105353404B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/02—Generating seismic energy
- G01V1/133—Generating seismic energy using fluidic driving means, e.g. highly pressurised fluids; using implosion
- G01V1/137—Generating seismic energy using fluidic driving means, e.g. highly pressurised fluids; using implosion which fluid escapes from the generator in a pulsating manner, e.g. for generating bursts, airguns
Abstract
The present invention relates to a kind of nearly drill bit bump focus pipe nipple in gas drilling shaft bottom, it includes short circuit body, cylinder block, piston（3）And air distributing device, cylinder block is installed in shell（1）It is interior, piston（3）In cylinder block, cylinder block and shell（1）Between lower inlet channel is set（8）, piston（3）Lower end and shell（1）Lower chamber is formed between inwall（2）, lower inlet channel（8）With lower chamber（2）Connection, cylinder block bottom（7）It is provided with upper air passage（9）, piston（3）Upper chamber is formed between upper end and cylinder block（6）, upper air passage（9）With upper chamber（6）Connection, air distributing device is arranged on cylinder deck.Be applied to focus in seismic prospecting near the nearly drill bit in shaft bottom by the focus pipe nipple, and controlled source is linear（Chirp）Scanning technique is combined with Mini SOSIE technologies, focus is inspired linear scan pulse signal to underground by pulse coding technique, and that improves seismic wave excites quality.
Description
Technical field
The present invention relates to oil, gas drilling equipment technology field, and in particular to a kind of nearly drill bit in gas drilling shaft bottom
Bump focus pipe nipple, the bump focus pipe nipple is mainly used in producing seismic wave at the nearly drill bit in gas drilling shaft bottom, obtains
The seismic wave information for taking can be used for the prediction for boring formation information and bit location.
Background technology
Drill bit can occur often during with gas horizontal well drilling, high angle hole in recent years and deviate showing for wellbore trace
As the design error typically produced in well track design process the reason for cause the phenomenon to occur.To solve the above problems,
The seismic wave that generation is vibrated near the drill bit of shaft bottom can be utilized the positioning to bit course, and time update is realized during drilling well
Well track.Such as in drilled straight well, placed near the mode received well bottom of wave detector with earth's surface using at the nearly drill bit in shaft bottom
Vibration, and seismic wave information to receiving processes, and real-time formation parameter can be obtained, according to the stratum ginseng for obtaining
Number can predict that drill bit front rock type, formation pore pressure, formation water output interval, the position of target zone and stress are special
Interval, reduce drilling process resource material resources waste；Meanwhile, also largely avoid the generation of drilling failure.
At present, the down-hole vibration source of above-mentioned drilling earthquake be the vibration produced by the use of drill bit axial impact as focus, utilize
Contact of the drill bit gear with stratum receives stratum to stratum Transmitted station by way of placing wave detector in well head and earth's surface
The seismic wave for reflecting, and processed to predict formation information and bit course to receiving seismic wave information.This side
There is problems with use in formula：（1）It is only applicable to rock bit, it is impossible to for PDC drill bit；（2）The vibration of drill bit
It is smaller random, impact energy；（3）The rotation of shaft bottom drill bit can influence the reception of shaft bottom back wave, meanwhile, bottomhole group
The vibration of conjunction also can produce influence to the vibration of drill bit；（4）Downhole drill bit vibration is not suitable for soft formation, deep-well section and horizontal well
Section, the reflected wave information decay of the earth's surface collection in inclined shaft and extended reach well is big.Therefore this mode is unfavorable for downhole formation
The prediction of information and bit course.
Deficiency based on above-mentioned drill bit source, it is considered to be used to seismic exploration seismic source produce earthquake near the drill bit of shaft bottom
Ripple.Meanwhile, to avoid bottom hole assemblies from vibrating with bit to shaft bottom epicenter excitation and the influence for receiving, shaft bottom drill bit is attached
Near earthquake source excite and seismic signal measurement must be arranged in drilling well pause or carry out other operations etc. relatively quietly in the case of
Carry out, do not disturb normal drilling well to work, be not take up drilling time.Existing conventional seismic exploration seismic source shakes including electric spark
The polytypes such as source, air gun, Dinoseis and weight focus.Wherein, spark source and air gun are applied to
Operation on the sea, is not suitable in During Air Drilling；Dinoseis is that fuel gas is imported into explosion chamber, is then drawn by electric spark
Quick-fried, the pulse that explosion time is produced reaches underground by explosion chamber base plate, and the focus reaction force is larger high to the pressure of the drill requirement, to blast
The intensity requirement of room is also high, influences drilling safety, and single-impact excitation energy is low, it is necessary to repeatedly excite；The requirement of weight focus
The quality of weight is big, is not readily used for underground work, and single-impact finite energy, uniformity is poor.
Additionally, pneumatic hammer used in During Air Drilling produces Pulse Source, frequency sweep by piston bump tup
Waterpower pulse bumper jar is cut off so as to produce pulse jarring rapidly the mud stream in runner by self-driven flow divider, although empty
Pneumatic hammer and frequency sweep waterpower pulse bumper jar can be used as down-hole vibration source, but both focus can also run into the application it is tired
It is difficult.First, the random distribution of impact speed is expected, it is necessary to hundreds of even thousands of secondary number of shocks, receive the time logical
Chang Keda a few minutes, conventional earthquake record instrument cannot meet requirement, it is necessary to special earthquake record instrument could be realized, and
And exploration efficiency of construction is also reduced because the attack time is very long, construction cost is increased, activity duration and safety to drilling well
Property generates influence.Secondly, although number of shocks is a lot, because the inherent limitations of pneumatic hammer and frequency sweep waterpower pulse bumper jar is difficult
To obtain the random sequence under a real meaning, therefore, serious correlated noise the signal to noise ratio of earthquake record can be produced compared with
Big influence.Because gas has high-compressibility, frequency sweep waterpower pulse bumper jar is not particularly suited for producing underground in gas drilling
Focus.
Based on the problem that above-mentioned various focus are present, it is considered to the bump focus pipe nipple with valve is used, by controllable shake
Source is linear（Chirp）Scanning technique and Mini-SOSIE technologies（Using battering ram as focus）With reference to generation is by low frequency to high frequency
Impact, the sequence of impacts randomness of formation is good, and number of shocks can be substantially reduced.Focus is made to ground by pulse coding technique
Under inspire linear scan pulse signal, and using decoding technique by the original earthquake of the small energy excitation situation of this continuous several times
Record is converted to the earthquake record of the big energy excitation of single of equivalence, can suppress correlated noise, improves the noise of earthquake record
Than so as to realize relatively reliable to downhole formation information and bit course, accurate prediction.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art and defect, there is provided a kind of nearly drill bit in gas drilling shaft bottom connects
Continuous impact origin pipe nipple, the seismic wave of present invention generation can be utilized in drilled straight well come predict formation lithology in front of drill bit,
Formation pore pressure, formation water output interval, position bit location, optimize casing setting depth, reduce the wind for boring and meeting dangerous interval
Danger；Drill bit to the distance of reservoir top bottom boundaries can be detected in horizontal well drilling section using the seismic wave of present invention generation, it is ensured that
Drill bit creeps into the optimum position of reservoir；And can be used for the detection of offset well anti-collision.
The purpose of the present invention is achieved through the following technical solutions：A kind of nearly drill bit bump focus in gas drilling shaft bottom
Pipe nipple, it includes short circuit body, cylinder block, piston and air distributing device；Short circuit body is formed by connecting by shell and top connection, cylinder
Body is arranged in shell, and cylinder block includes cylinder block outer wall, the gentle cylinder base of cylinder block inwall, and piston coordinates installed in cylinder
Between the gentle inboard wall of cylinder block of external wall, piston can be moved back and forth in cylinder block；Set between cylinder block outer wall and outer casing inner wall
Lower inlet channel, forms lower chamber between piston and outer casing inner wall, lower inlet channel is connected with lower chamber, cylinder block bottom
On be provided with upper air passage, upper chamber is formed between piston upper end and cylinder block, upper air passage is connected with upper chamber；Distribution
Device includes gas distribution plate, stepper motor A, distribution base and flow valve, and described gas distribution plate is arranged on cylinder block top, gas distribution plate
Also coordinate and be arranged in distribution base, described gas distribution plate is connected with the output shaft of stepper motor A, constitute electric-controlled switch valve, match somebody with somebody
Gas base engagement is arranged in shell, and distribution chamber is formed between gas distribution plate and distribution base, and the top of distribution base is provided with
Distribution base air inlet, flow valve is provided with distribution base air inlet.Flow valve controls the air inflow of distribution base air inlet,
Gas is set to enter distribution chamber with certain flow, stepper motor A drives gas distribution plate to rotate to an angle, makes the gas in air distribution cavity room
Body enters upper chamber, lower chamber by different air inlets respectively, drives piston to move reciprocatingly.
Preferably, described shell and top connection is connected through a screw thread.
Preferably, described screw thread is taper thread.Taper thread connection can effectively improve connection sealing energy.
Preferably, it is provided with sealing ring at described outer casing inner wall and piston cooperation.
Preferably, several enterprising gas ports and air inlet under several are along the circumferential direction respectively arranged with described gas distribution plate
Mouthful, enterprising gas port is arranged in the interior annular of gas distribution plate, and lower air inlet is arranged in the outer toroid of gas distribution plate, described upper air
Mouth is corresponding with upper air passage；Described lower air inlet is corresponding with lower inlet channel.
When the piston movement inside pipe nipple is not needed, stepper motor A drives gas distribution plate to rotate to an angle, and makes upper air
Mouth aligns with upper air passage, and gas is directly entered the fluid passage at pipe nipple center by upper chamber, finally enters through bit nozzle
Enter annular space.
When drill bit runs into special formation needs to carry out drilling earthquake exploration, stop drilling well and enough brills simultaneously are applied to drill bit
Pressure, prevents drill bit decoupled with stratum in the presence of piston strong impact power.Stepper motor A drives gas distribution plate to rotate so that match somebody with somebody
Lower air inlet in gas disk outer toroid aligns with lower inlet channel, and lower chamber starts air inlet, promotes piston upwards, works as piston
When moving to certain distance, lower chamber starts exhaust, and piston is continued up in the presence of inertia；Move a segment distance
Afterwards, drive gas distribution plate to rotate to an angle by stepper motor A and cause that the enterprising gas port in gas distribution plate interior annular leads to upper air
Road aligns, and upper chamber starts air inlet, and piston first does retarded motion, then accelerates the chopping block inside impact pipe nipple downwards, while logical
Crossing stepper motor A drives the enterprising gas port of gas distribution plate rotary closing, upper chamber to start exhaust, said process is circulated successively, makes piston
Move back and forth the frequency and amplitude for producing and meeting seismic prospecting needs.Although upper chamber starts air inlet, into upper chamber
Gas can flow into lower inlet channel, but because lower inlet channel is closing, so not interfering with upper chamber air inlet promotes piston
Move downward.Stop boring and receive that seismic wave allows for downhole drill bit rotation and the vibration of DHA is excited to seismic wave
The earthquake reflected wave quality received with the influence for receiving, raising.Hard stratum is run into, it is necessary to improve the broken rock of drill bit when boring
During ability, chopping block of the piston inside the reciprocating motion bump pipe nipple under gas effect can also improve the broken rock energy of drill bit
Power, so as to improve bit speed.
Preferably, described stepper motor A output ends set installation axle, and installation axle is arranged on the center of gas distribution plate.
Preferably, described flow valve is automatically controlled flow valve, described automatically controlled flow valve include seal rubber plug, adjusting rod,
Valve body, stepper motor B and control system；Described valve body is arranged on distribution base, and valve body lower end is provided with valve body air inlet,
Valve body air inlet is connected with distribution base air inlet, and adjusting rod coordinates in valve body, and the lower end of adjusting rod is provided with sealing
Plug, the inner surface at the maximum gauge of seal rubber plug with valve body is in sealing contact, the upper end of adjusting rod and the output of stepper motor B
End connection, adjusting rod moves up and down to realize the work of accurate adjustment gas flow under the drive of stepper motor B in valve body
With；Valve body top sets location division, the distance that location division control adjusting rod is moved down, when the top bottom surface of adjusting rod touches
During location division, the continuing to be selected into of adjusting rod is obstructed, and stepper motor B experiences stress and is automatically stopped operation, plays zero effect.Its
In, stepper motor B is bolted on valve body, and stepper motor B is also connected with control system.
Electric-controlled switch valve, automatically controlled flow valve and control system are installed inside pipe nipple, are to ensure swashing for every Secondary Shocks
Hair energy stabilization, the excitation energy uniformity of repeat impact is good；And impact interval can be with controlled linearly increasing；The letter of generation
Number bandwidth, its low-frequency component penetrating capacity is strong, can penetrate thicker coating, and radio-frequency component being capable of finer resolution coating
In small impedance layer, can be used for high-resolution exploration.
Preferably, described control system is arranged on the inwall of shell, and control system outside is provided with outside control system
Shell.
Preferably, the cooperation mounting surface of described adjusting rod Yu valve body is screw thread mating surface.Controlled with the pitch revolved
Adjusting rod it is upper and lower, further control seal rubber plug it is upper and lower, reach the purpose of accurate flow control.
The present invention has advantages below：
1st, seismic signal good combination property, is easy to reliability, predicts downhole formation information and bit course, operation exactly
Mode is simple and direct, economical, safe and reliable：Domestic and international existing drilling earthquake exploration engineering, is mostly faint using rock bit
Random vibration, generation seismic wave, jitter, this brings and is difficult to what is overcome to collection, treatment and the explanation of surface seismic ripple
Difficulty, causes drilling earthquake technology to be difficult to apply in informed drilling decisions.Focus pipe nipple of the invention is linear by controlled source
（Chirp）Scanning technique and Mini-SOSIE technologies（Using battering ram as focus）With reference to making focus by pulse coding technique
Controllable linear scan pulse signal is inspired to underground, excitation energy stabilization of the focus per Secondary Shocks, repeat impact is excited
Energy coincidence is good；And can in the case where the drillng operation time is not disturbed, according to geological prospecting the need for, it is automatically controlled by adjusting
Flow valve and electric-controlled switch valve set different impactor frequency and amplitudes, are spaced impact controlled linearly increasing；Produce
Raw signal band is wide, and its low-frequency component penetrating capacity is strong, can penetrate thicker coating, and radio-frequency component being capable of finer resolution
Small impedance layer in coating, can be used for high-resolution exploration.By at the nearly drill bit in shaft bottom and earth's surface place wave detector side
Formula receives the seismic wave that reflects of stratum, and seismic wave information to receiving is processed.
By above scheme, problems with can be effectively solved：（1）Obtain more precisely when deeply convince seismic chart before breath and drill bit
Picture, the accurate borehole position for determining to pass through multiple reservoirs；（2）With pore pressure prediction result before drill bit, drilling well danger is avoided, with
And short range salt body is measured in real time；（3）Geologic horizon according to the observation, bit location is determined on surface seismic section, makes to trap
Pipe depth and coring depth selection are more accurate；（4）If installing wave detector collection bed boundary on focus pipe nipple to reflect
Ripple, horizontal well drilling section when can also determine drill bit to the distance of reservoir top bottom boundaries, for offset well anti-collision monitoring, it is ensured that brill
Head creeps into the optimum position of reservoir.
2nd, noise is suppressed, it is to avoid interference：Focus pipe nipple of the invention is linear by controlled source（Chirp）Scanning technique with
Mini-SOSIE technologies（Using battering ram as focus）With reference to making focus excite cutting edge aligned sweeping to underground by pulse coding technique
Pulse signal is retouched, the original seismic data of the small energy excitation situation of this continuous several times is converted to by equivalence using decoding technique
The earthquake record of the big energy excitation of single, can suppress correlated noise, it is to avoid influence of the noise to signal acquisition, and collection signal is more
Accurately, it is reliable.
3rd, influence of the gas medium to ripple is overcome：The focus pipe nipple is connected between drill bit and well dynamic instrument, is passed through
The incoming stratum of vibration wave can be overcome decay of the gas medium to ripple, and gas and ground stratum boundary by contact of the drill bit with earthquake
Influence of the larger reflectance factor in face to seismic wave.
4th, rock breaking capacity is improved, accelerates bit speed：The focus pipe nipple can not only produce linear scan pulse signal, together
When can also as pneumatic hammer, bump stratum improve drill bit rock fracture in dynamic indentation ability, accelerate bit speed.
5th, reciprocating motion of the pistons is good：The focus pipe nipple can overcome pneumatic hammer to there is dead band during horizontal well drilling
Problem, so-called dead-time problem is that the piston of the pneumatic hammer during horizontal well drilling can not normally move reciprocatingly.
6th, have a wide range of application：The focus pipe nipple is applicable not only to rock bit, is also applied for PDC drill bit and produces linear scan
Pulse signal.
Brief description of the drawings
Fig. 1 is a kind of general assembly structural representation of the nearly drill bit bump focus pipe nipple in gas drilling shaft bottom of the invention；
Fig. 2 is a kind of structural representation of the nearly drill bit bump focus pipe nipple lower chamber air inlet in gas drilling shaft bottom of the invention
Figure；
Fig. 3 is a kind of structural representation of the nearly drill bit bump focus pipe nipple upper chamber air inlet in gas drilling shaft bottom of the invention
Figure；
Fig. 4 is the semi-cutaway of automatically controlled flow valve front view in the present invention；
Fig. 5 is the semi-cutaway and A- of front view when gas distribution plate is not installed between cylinder block bottom and distribution base in the present invention
A cross section views；
Fig. 6 is the top view of gas distribution plate in the present invention；
In figure：1- shells, 2- lower chambers, 3- pistons, 4- cylinder block outer walls, 5- cylinder block inwalls, 6- upper chambers, 7- cylinders
Body bottom, inlet channel under 8-, 9- upper air passages, 10- distribution bases, 11- distribution base air inlets, 12- seal rubber plugs,
13- adjusting rods, 14- location divisions, 15- valve bodies, 16- stepper motors B, 17- top connection, 18- sealing rings, 19- stepper motors A, 20-
Installation axle, 21- gas distribution plates, the enterprising gas ports of 22-, 23- distribution chambers, 24- valve body air inlets, 25- control systems, 26- controls system
System shell, air inlet under 27-.
Specific embodiment
The present invention will be further described below in conjunction with the accompanying drawings, but protection scope of the present invention is not limited to following institute
State.
As shown in Figure 1, Figure 2 and Figure 3, the nearly drill bit bump focus pipe nipple in a kind of gas drilling shaft bottom, it includes short circuit
Body, cylinder block, piston 3 and air distributing device.Short circuit body is formed by connecting by shell 1 and top connection 17, described connected mode
It is taper thread, is connected using taper thread, good seal performance can effectively prevents gas from leaking.
Cylinder block is arranged in shell 1, and cylinder block includes cylinder block outer wall 4, the gentle cylinder base 7 of cylinder block inwall 5, living
Plug 3 coordinates between the gentle inboard wall of cylinder block 5 of cylinder block outer wall 4, and piston 3 can be reciprocal in cylinder block in the presence of gas
Motion.
Lower inlet channel 8, shape between the lower end of piston 3 and the inwall of shell 1 are set between cylinder block outer wall 4 and the inwall of shell 1
Being provided with sealing ring 18 into lower chamber 2, at the inwall of shell 1 and the lower end cooperation of piston 3 prevents gas from leaking, lower inlet channel 8 with
Lower chamber 2 is connected；Upper air passage 9 is provided with cylinder block bottom 7, upper chamber 6 is formed between the upper end of piston 3 and cylinder block,
Upper air passage 9 is connected with upper chamber 6, concrete structure as shown in Figure 1, Figure 2, shown in Fig. 3 and Fig. 5.
Air distributing device includes gas distribution plate 21, stepper motor A19, distribution base 10 and flow valve.Described gas distribution plate 21 is pacified
Mounted in cylinder block top, gas distribution plate 21 also coordinates in distribution base 10, and distribution base 10 coordinates in shell 1,
Distribution chamber 23 is formed between gas distribution plate 21 and distribution base 10, the top of distribution base 10 is provided with distribution base air inlet
11, it is provided with flow valve at distribution base air inlet 11.Described stepper motor A19 output ends set installation axle 20, gas distribution plate
Square mounting hole is set, and installation axle 20 is arranged in the square mounting hole of gas distribution plate 21, stepper motor A19 and gas distribution plate 21 on 21
Composition electric-controlled switch valve.
As shown in fig. 6, set on inner periphery on described gas distribution plate 21 setting four on four enterprising gas ports 22, excircle
Lower air inlet 27, enterprising gas port 22 is in the same size with upper air passage 9, the size one of lower air inlet 27 and lower inlet channel 8
Cause.The air inflow of flow valve control distribution base air inlet 11, makes gas enter distribution chamber 23, stepper motor with certain flow
A19 drives gas distribution plate 21 to rotate to an angle, and the gas in distribution chamber 23 is passed through enterprising gas port 22 and lower air inlet respectively
27 enter upper chamber 6 and lower chamber 2, drive piston 3 to move reciprocatingly.
As shown in figure 1, when not needing the piston 3 inside pipe nipple to move, stepper motor A19 drives the rotation of gas distribution plate 21 one
Determine angle, enterprising gas port 22 is alignd with upper air passage 9, gas leads to by the fluid that upper chamber 6 is directly entered pipe nipple center
Road, finally enters annular space through bit nozzle.
As shown in Figures 2 and 3, when drill bit runs into special formation needs to carry out drilling earthquake exploration, drilling well is stopped simultaneously right
Drill bit applies enough the pressure of the drill, prevents drill bit decoupled with stratum in the presence of piston strong impact power.Stepper motor A19 drives
Gas distribution plate 21 is rotated so that the lower inlet channel 8 pairs on lower air inlet 27 and cylinder block bottom on gas distribution plate 21 in outer toroid
Together, lower chamber 2 starts air inlet, promotes piston 3 to move upwards, and when piston 3 moves to certain distance, lower chamber 2 starts exhaust,
Piston 3 is continued up in the presence of inertia；After moving a segment distance, gas distribution plate 21 is driven to revolve by stepper motor A19
When turning certain angle so that the enterprising gas port 22 in the interior annular of gas distribution plate 21 aligns with the upper air passage 9 of cylinder block bottom, on
Air chamber 6 starts air inlet, and piston 3 first does retarded motion, then accelerates the chopping block inside impact pipe nipple downwards, while by stepping electricity
Machine A19 drives the enterprising gas port 22 of the rotary closing of gas distribution plate 21, upper chamber 6 to start exhaust, said process is circulated successively, makes piston 3
Move back and forth the frequency and amplitude for producing and meeting seismic prospecting needs.Although upper chamber 6 starts air inlet, into upper chamber
6 gas can flow into lower inlet channel 8, but because lower inlet channel 8 is closing, so not interfering with the air inlet of upper chamber 6 promotion
Piston 3 is moved downward.Stop brill reception seismic wave and allow for downhole drill bit rotation and the vibration of DHA to earthquake
The influence that ripple is excited and received, the earthquake reflected wave quality that raising is received.
Hard stratum is run into, it is necessary to when improving the rock breaking capacity of drill bit when boring, reciprocal fortune of the piston 3 under gas effect
Chopping block inside dynamic bump pipe nipple can also improve the rock breaking capacity of drill bit, so as to improve bit speed.
As shown in Figure 1 and Figure 4, described flow valve is automatically controlled flow valve, and it includes seal rubber plug 12, adjusting rod 13, valve
Body 15, stepper motor B16 and control system 25.Described valve body 15 is arranged on distribution base 10, and the lower end of valve body 15 is provided with
Valve body air inlet 24, valve body air inlet 24 is connected with distribution base air inlet 11, and adjusting rod 13 coordinates in valve body 15, is adjusted
The upper end of pole 13 is connected with the output end of stepper motor B16, and adjusting rod 13 is under the drive of stepper motor B16 in valve body 15
Move up and down to realize the effect of accurate adjustment gas flow.Adjusting rod 13 is screw thread cooperation with the cooperation mounting surface of valve body 15
Face, the lower end of adjusting rod 13 is provided with seal rubber plug 12, and the inner surface at the maximum gauge of seal rubber plug 12 with valve body 15 is sealed
Contact, the upper and lower of seal rubber plug 12 is controlled with the pitch revolved, and reaches the purpose of accurate flow control.The top of valve body 15 also sets
Location division 14 is equipped with, the distance that the control adjusting rod 13 of location division 14 is moved down is determined when the top bottom surface of adjusting rod 13 touches
During the portion 14 of position, the continuing to be selected into of adjusting rod 13 is obstructed, and stepper motor B16 experiences stress and is automatically stopped operation, plays zero effect.
Wherein, stepper motor B16 is bolted on valve body 15, and stepper motor B16 is also connected with control system 25.
Described control system 25 is arranged on the inwall of shell 1, and the outside of control system 25 is provided with control system shell
26。
Installation control system 25, automatically controlled flow valve and electric-controlled switch valve inside pipe nipple, are to ensure that focus is rushed every time
The excitation energy stabilization hit, the excitation energy uniformity of repeat impact is good；And cause that impact interval can be with controlled linear increasing
Plus；The signal band of generation is wide, and its low-frequency component penetrating capacity is strong, can penetrate thicker coating, and radio-frequency component can be thin
Cause to differentiate the small impedance layer in coating, can be used for high-resolution exploration.
When specifically used of the invention, bump focus pipe nipple is connected between drill bit and mud motor, and with brill
Head and DHA are together in lower going-into-well.At drilling prospection new district, it is unclear that the geological structure on stratum to be drilled, stress are special
Different stratomere, it is necessary to according to well depth, well type, hole diameter, strata pressure, air compressor before needs are pierced with brill exploration well section
Power, gas injection pressure, the in-situ data such as drilling well section drill bit structure, the pressure of the drill for using sets and produce with boring vibroseis generator
Life meets the vibration frequency and amplitude of seismic prospecting needs.
It is last it should be noted that embodiments above is merely illustrative of the technical solution of the present invention and unrestricted, this area
It is to be appreciated by one skilled in the art that not departing from the modification or equal replacement of technical solution of the present invention essence, the present invention is belonged to
Protection domain.
Claims (7)
1. the nearly drill bit bump focus pipe nipple in a kind of gas drilling shaft bottom, it is characterised in that：It includes short circuit body, cylinder
Body, piston（3）And air distributing device, short circuit body is by shell（1）And top connection（17）It is formed by connecting, cylinder block is arranged on shell
（1）Interior, cylinder block includes cylinder block outer wall（4）, cylinder block inwall（5）Gentle cylinder base（7）, piston（3）Cooperation is arranged on
Cylinder block outer wall（4）Gentle inboard wall of cylinder block（5）Between, piston（3）Can be moved back and forth in cylinder block, cylinder block outer wall（4）With
Shell（1）Lower inlet channel is provided between inwall（8）, piston（3）Lower end and shell（1）Lower chamber is formed between inwall（2）,
Lower inlet channel（8）With lower chamber（2）Connection, cylinder block bottom（7）On be provided with upper air passage（9）, piston（3）Upper end with
Upper chamber is formed between cylinder block（6）, upper air passage（9）With upper chamber（6）Connection, air distributing device includes gas distribution plate（21）、
Stepper motor A（19）, distribution base（10）And flow valve, described gas distribution plate（21）Installed in cylinder block top, gas distribution plate
（21）Also coordinate and be arranged on distribution base（10）Interior, described gas distribution plate（21）With stepper motor A（19）Output shaft connection, match somebody with somebody
Gas disk（21）With stepper motor A（19）Composition electric-controlled switch valve, distribution base（10）Coordinate and be arranged on shell（1）It is interior, gas distribution plate
（21）With distribution base（10）Between formed distribution chamber（23）, distribution base（10）Top be provided with distribution base air inlet
（11）, distribution base air inlet（11）Place is provided with flow valve；
Described gas distribution plate（21）On be along the circumferential direction respectively arranged with several enterprising gas ports（22）With several lower air inlets
（27）, described enterprising gas port（22）With upper air passage（9）Corresponding, described lower air inlet（27）With lower inlet channel
（8）It is corresponding；
Described flow valve is automatically controlled flow valve, and described automatically controlled flow valve includes seal rubber plug（12）, adjusting rod（13）, valve body
（15）, stepper motor B（16）And control system（25）, described valve body（15）Installed in distribution base（10）On, valve body（15）
Lower end is provided with valve body air inlet（24）, valve body air inlet（24）With distribution base air inlet（11）Connection, adjusting rod（13）Match somebody with somebody
Close and be arranged on valve body（15）It is interior, adjusting rod（13）Upper end and stepper motor B（16）Output end connection, adjusting rod（13）Under
End is provided with seal rubber plug（12）, valve body（15）Top sets location division（14）, location division（14）Control adjusting rod（13）Downwards
Mobile distance, stepper motor B（16）Also with control system（25）Connection.
2. the nearly drill bit bump focus pipe nipple in a kind of gas drilling shaft bottom according to claim 1, it is characterised in that：Institute
The shell stated（1）And top connection（17）It is connected through a screw thread.
3. the nearly drill bit bump focus pipe nipple in a kind of gas drilling shaft bottom according to claim 2, it is characterised in that：Institute
The screw thread stated is taper thread.
4. the nearly drill bit bump focus pipe nipple in a kind of gas drilling shaft bottom according to claim 1, it is characterised in that：Institute
The shell stated（1）Inwall and piston（3）Sealing ring is provided with the cooperation of lower end（18）.
5. the nearly drill bit bump focus pipe nipple in a kind of gas drilling shaft bottom according to claim 1, it is characterised in that：Institute
The stepper motor A for stating（19）Output end sets installation axle（20）, installation axle（20）Installed in gas distribution plate（21）Center.
6. the nearly drill bit bump focus pipe nipple in a kind of gas drilling shaft bottom according to claim 1, it is characterised in that：Institute
The control system stated（25）Installed in shell（1）Inwall on, control system（25）Outside is provided with control system shell（26）.
7. the nearly drill bit bump focus pipe nipple in a kind of gas drilling shaft bottom according to claim 1, it is characterised in that：Institute
The adjusting rod stated（13）With valve body（15）Cooperation mounting surface be screw thread mating surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN108375787B (en) * | 2018-03-02 | 2023-11-14 | 西南石油大学 | Near-bit seismic source nipple for detection before gas drilling |
| CN109031405B (en) * | 2018-06-19 | 2024-04-12 | 吉林大学 | Seismic source driving device and seismic wave generating equipment |
| CN109541678B (en) * | 2018-12-21 | 2023-12-12 | 中国铁建重工集团股份有限公司 | Earthquake source device for continuously adjusting impact frequency by earthquake method |
| CN109441354A (en) * | 2018-12-22 | 2019-03-08 | 西南石油大学 | A kind of pulsating cyclic shock wave auxiliary rock device |
| CN109541679B (en) * | 2019-01-15 | 2024-03-15 | 康会峰 | Novel artificial seismic source |
| CN111307836B (en) * | 2019-12-10 | 2022-04-15 | 西南石油大学 | PE pipe performance testing device under seismic wave load |
| CN112731516A (en) * | 2020-12-18 | 2021-04-30 | 四川京航天程科技发展有限公司 | Pneumatic artificial seismic source device without open fire |
| CN113700433B (en) * | 2021-09-09 | 2023-05-12 | 西南石油大学 | Self-generating wind pressure electromagnetic combined impact autorotation type air hammer and use method thereof |
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| US4852669A (en) * | 1988-05-09 | 1989-08-01 | Walker Thomas A | Directional downhole drill apparatus |
| KR200294253Y1 (en) * | 2002-07-10 | 2002-11-04 | 임병덕 | hammer bit hitting apparatus for digging |
| CN201016269Y (en) * | 2007-01-30 | 2008-02-06 | 新疆石油管理局钻井工艺研究院 | Air jump bit for oil gas drilling well |
| US7832502B2 (en) * | 2008-02-08 | 2010-11-16 | Javins Corporation | Methods and apparatus for drilling directional wells by percussion method |
| AU2009202750A1 (en) * | 2008-07-10 | 2010-01-28 | Bernard Lionel Gien | Pneumatic drill |
| CN202745682U (en) * | 2012-09-20 | 2013-02-20 | 瑞安市八达工程机械有限公司 | Large-diameter DTH (down the hole) hammer impactor |
| CN205139381U (en) * | 2015-12-02 | 2016-04-06 | 西南石油大学 | Nearly drill bit bump seismic source nipple joint in gas drilling shaft bottom |
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