CN205139381U - Nearly drill bit bump seismic source nipple joint in gas drilling shaft bottom - Google Patents
Nearly drill bit bump seismic source nipple joint in gas drilling shaft bottom Download PDFInfo
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- CN205139381U CN205139381U CN201520985386.6U CN201520985386U CN205139381U CN 205139381 U CN205139381 U CN 205139381U CN 201520985386 U CN201520985386 U CN 201520985386U CN 205139381 U CN205139381 U CN 205139381U
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Abstract
The utility model relates to a nearly drill bit bump seismic source nipple joint in gas drilling shaft bottom, it includes the short circuit body, the cylinder block, piston (3) and distributing device, the cylinder block is installed in shell (1), install in the cylinder block piston (3), set up down inlet channel (8) between cylinder block and shell (1), form between piston (3) lower extreme and shell (1) inner wall lower chamber (2), inlet channel (8) communicate with lower chamber (2) down, be equipped with on the cylinder block bottom (7) inlet channel (9), form between piston (3) upper end and the cylinder block upper chamber (6), go up inlet channel (9) and upper chamber (6) intercommunication, distributing device sets up at cylinder deck. Near nearly drill bit in shaft bottom is used to the seismic source of this seismic source nipple joint in with seismic prospecting, combines linear (Chirp) the scanning technique of controlled source with the mini -SOSIE technique, makes the seismic source inspire linear trace pulse signal to the underground through the pulse code technique, the improvement seismic wave arouse the quality.
Description
Technical field
The utility model relates to oil, gas drilled hole equipment technology field, be specifically related to the nearly drill bit bump in a kind of gas drilling shaft bottom focus pipe nipple, this bump focus pipe nipple is mainly used in nearly drill bit place, gas drilling shaft bottom and produces seismic event, and the seismic event Information Availability of acquisition is in the prediction with brill formation information and bit location.
Background technology
Often the phenomenon that drill bit departs from wellbore trace can be there is in recent years, the design error that the reason causing this phenomenon to occur normally produces in well track design process in the process with gas horizontal well drilling, long horizontal traverse well.For solving the problem, the location of seismic event realization to bit trajectory vibrating generation near the drill bit of shaft bottom can be utilized during drilling well, and time update well track.As when drilled straight well, utilization places the vibration near at the bottom of the mode received well of wave detector at nearly drill bit place, shaft bottom and earth's surface, and the seismic event information received is processed, real-time formation parameter can be obtained, the position of drill bit front rock type, formation pore pressure, formation water output interval, zone of interest and the special interval of stress can be predicted according to the formation parameter obtained, reduce the waste of the resource material resources of drilling process; Meanwhile, also largely avoid the generation of drilling failure.
At present, the down-hole vibration source of above-mentioned drilling earthquake be utilize drill bit axial impact to produce vibration as focus, utilize the contact on drill bit gear and stratum to stratum Transmitted station, receive by the mode of placing wave detector on well head and earth's surface the seismic event that stratum reflects, and carry out process come predicting formation information and bit trajectory to receiving seismic event information.In use there is following problem in this mode: (1) is only applicable to tooth-wheel bit, cannot be used for PDC drill bit; (2) vibration of drill bit be random, impact energy is less; (3) rotation of shaft bottom drill bit can affect the reception of shaft bottom reflection wave, and meanwhile, the vibration of bottom hole assemblies also can have an impact to the vibration of drill bit; (4) downhole drill bit vibration is not suitable for soft formation, deep-well section and lateral segment, and the reflected wave information decay that earth's surface gathers in inclined shaft and extended reach well is large.Therefore this mode is unfavorable for the prediction to downhole formation information and bit trajectory.
Based on the deficiency of above-mentioned drill bit source, consider seismic exploration seismic source to be used near the drill bit of shaft bottom, produce seismic event.Simultaneously; vibrate for avoiding bottom hole assemblies and bit on the impact of shaft bottom epicenter excitation and reception; near the drill bit of shaft bottom, focus excites to measure with seismic signal and must be arranged in drilling well and suspend or carry out under carrying out the relative quietly situation such as other operation; do not disturb normal drilling well work, do not take rig time.Existing conventional seismic exploration seismic source comprises the polytypes such as sparker source, air gun, Dinoseis and weight focus.Wherein, sparker source and air gun are applicable to offshore operation, are not suitable in During Air Drilling; Dinoseis is that inflammable gas is imported explosion chamber, then ignited by electric spark, the pulse that explosion time produces reaches underground by explosion chamber base plate, this focus reacting force is larger to be required high to the pressure of the drill, also high to the requirement of strength of explosion chamber, affect drilling safety, and single-impact excitation energy is low, needs repeatedly to excite; Weight focus requires that the quality of weight is large, is not easy for borehole operation, and the finite energy of single-impact, consistance is poor.
In addition, air forging hammer used in During Air Drilling produces Pulse Source by piston bump tup, mud stream in runner to be cut off rapidly by self-driven diverting valve thus is produced pulse jarring by frequency sweep waterpower pulse shock sub, although air forging hammer and frequency sweep waterpower pulse shock sub can be used as down-hole vibration source, these two kinds of focus also can be met difficulty in the application.First, expect the stochastic distribution of impact speed, need hundreds of time even thousands of secondary number of shocks, time of reception can reach a few minutes usually, conventional seismologic record instrument cannot meet the demands, and needs special seismologic record instrument to realize, and also reduces exploration operating efficiency because the attack time is very long, add construction cost, impact is created on activity duration of drilling well and security.Secondly, although number of shocks is a lot, because the inherent limitations of air forging hammer and frequency sweep waterpower pulse shock sub is difficult to obtain the random series under a real meaning, therefore, serious correlation noise can produce considerable influence to the signal to noise ratio (S/N ratio) of seismologic record.Because gas exists high-compressibility, frequency sweep waterpower pulse shock sub is not also suitable for produces down-hole vibration source in gas drilling.
Based on above-mentioned various focus Problems existing, consider the bump focus pipe nipple adopting band valve, linear for vibroseis (Chirp) scanning technique and Mini-SOSIE technology (using battering ram as focus) are combined, produce by the impact of low frequency to high frequency, the sequence of impacts randomness formed is good, and number of shocks can significantly reduce.Focus is made to inspire linear sweep pulse signal to underground by pulse coding technique, and the seismologic record that the single macro-energy adopting decoding technique the original seismic data of little for this continuous several times energy excitation situation to be converted to equivalence excites, correlation noise can be suppressed, improve the signal to noise ratio (S/N ratio) of seismologic record, thus realize more reliably, accurately predicting downhole formation information and bit trajectory.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art and defect, the nearly drill bit bump in a kind of gas drilling shaft bottom focus pipe nipple is provided, the seismic event that the utility model can be utilized when drilled straight well to produce is to predict formation lithology, formation pore pressure, the formation water output interval in drill bit front, location bit location, optimize casing setting depth, reduce the risk of boring and meeting dangerous interval; The seismic event utilizing the utility model to produce at horizontal well drilling Duan Shike, to detect the distance of drill bit to reservoir top bottom boundaries, ensures that drill bit creeps in the optimum position of reservoir; And can be used for the detection of offset well anti-collision.
The purpose of this utility model is achieved through the following technical solutions: the nearly drill bit bump in a kind of gas drilling shaft bottom focus pipe nipple, and it comprises short circuit body, cylinder block, piston and air distributing device; Short circuit body is formed by connecting by shell and top connection, cylinder block is installed in the enclosure, cylinder block comprises cylinder block outer wall, the gentle cylinder base of cylinder block inwall, and piston coordinates and is arranged between the gentle inboard wall of cylinder block of cylinder block outer wall, and piston can to-and-fro movement in cylinder block; Lower inlet channel is set between cylinder block outer wall and outer casing inner wall, form lower chamber between piston and outer casing inner wall, lower inlet channel is communicated with lower chamber, is provided with upper air passage on bottom cylinder block, form upper chamber between piston upper end and cylinder block, upper air passage is communicated with upper chamber; Air distributing device comprises gas distribution plate, stepper motor A, distribution base and flow valve, described gas distribution plate is arranged on cylinder block top, gas distribution plate also coordinates and is arranged in distribution base, described gas distribution plate is connected with the output shaft of stepper motor A, composition electric-controlled switch valve, distribution base engagement is installed in the enclosure, forms distribution chamber between gas distribution plate and distribution base, the top of distribution base is provided with distribution base air intake opening, and distribution base air intake opening place is provided with flow valve.Flow valve controls the air inflow of distribution base air intake opening, gas is made to enter distribution chamber with certain flow, stepper motor A drives gas distribution plate to rotate to an angle, and make the gas of air distribution cavity indoor enter upper chamber, lower chamber respectively by different air intake openings, driven plunger moves reciprocatingly.
Preferably, described shell and top connection are threaded connection.
Preferably, described screw thread is taper thread.Taper thread connects can effectively improve connection sealing energy.
Preferably, described outer casing inner wall and piston cooperation place are provided with O-ring seal.
Preferably, described gas distribution plate is along the circumferential direction respectively arranged with several enterprising gas ports and air intake opening under several, enterprising gas port is arranged on the interior annulus of gas distribution plate, and lower air intake opening is arranged in the outer toroid of gas distribution plate, and described enterprising gas port is corresponding with upper air passage; Described lower air intake opening is corresponding with lower inlet channel.
When not needing the piston movement of pipe nipple inside, stepper motor A drives gas distribution plate to rotate to an angle, and enterprising gas port is alignd with upper air passage, and gas directly enters the fluid passage at pipe nipple center through upper chamber, finally enters annular space through bit nozzle.
When drill bit run into special formation need to carry out drilling earthquake exploration time, stop drilling well also to apply enough the pressure of the drill to drill bit, prevent drill bit under the effect of the powerful impulsive force of piston with ground pull-up coupling.Stepper motor A drives gas distribution plate to rotate, and the lower air intake opening in gas distribution plate outer toroid is alignd with lower inlet channel, and lower chamber starts air inlet, promote piston upwards, when piston movement is to certain distance, lower chamber starts exhaust, continues to move upward at the effect lower piston of inertia; Move after a segment distance, driving gas distribution plate to rotate to an angle by stepper motor A makes the enterprising gas port in gas distribution plate on annulus align with upper air passage, upper chamber starts air inlet, piston first does retarded motion, then accelerate the chopping block impacting pipe nipple inside downwards, drive the enterprising gas port of gas distribution plate rotary closing by stepper motor A, upper chamber starts exhaust simultaneously, circulate said process successively, makes reciprocating motion of the pistons produce frequency and the amplitude of seismic exploration needs contentedly.Time although upper chamber starts air inlet, the gas entering upper chamber can flow into lower inlet channel, because lower inlet channel is closed, so can not affect upper chamber air inlet to promote moving downward of piston.Stopping boring reception seismic event is the impact considering that the vibration of downhole drill bit rotation and DHA excites seismic event and receives, and improves the earthquake reflected wave quality received.When brill runs into hard stratum, when needing the rock breaking capacity improving drill bit, the chopping block of the to-and-fro movement bump pipe nipple inside of piston under gas effect can also improve the rock breaking capacity of drill bit, thus improves bit speed.
Preferably, described stepper motor A output terminal arranges installation shaft, and installation shaft is arranged on the center of gas distribution plate.
Preferably, described flow valve is automatically controlled flow valve, and described automatically controlled flow valve comprises seal rubber plug, adjuster bar, valve body, stepper motor B and control system; Described valve body is arranged on distribution base, valve body lower end is provided with valve body air intake opening, valve body air intake opening is communicated with distribution base air intake opening, adjuster bar cooperation is arranged in valve body, the lower end of adjuster bar is provided with seal rubber plug, the maximum gauge place of seal rubber plug seals with the inside surface of valve body and contacts, and the upper end of adjuster bar is connected with the output terminal of stepper motor B, and adjuster bar moves up and down the effect realizing fine adjustment gas flow under the drive of stepper motor B in valve body; Valve body top arranges location division, the distance that location division regulating and controlling bar moves down, and when the bottom surface, top of adjuster bar touches location division, the continuing to be selected into of adjuster bar is obstructed, and it is automatically out of service that stepper motor B experiences stress, plays zero effect.Wherein, stepper motor B is bolted on valve body, and stepper motor B is also connected with control system.
Installing electric-controlled switch valve, automatically controlled flow valve and control system in pipe nipple inside, is that the excitation energy consistance of repeat impact is good in order to ensure that the excitation energy of every Secondary Shocks is stablized; And impact the linear increase that can there be control at interval; The signal band produced is wide, and its low-frequency component penetrating capacity is strong, can penetrate thicker overlayer, and radio-frequency component can little impedance layer in finer resolution overlayer, can be used for high-resolution exploration.
Preferably, described control system is arranged on the inwall of shell, and control system arranged outside has control system shell.
Preferably, described adjuster bar is threaded engagement face with the installed surface that coordinates of valve body.Carry out the upper and lower of regulating and controlling bar with revolved pitch, control the upper and lower of seal rubber plug further, reach the object of accurate flow control.
The utility model has the following advantages:
1, seismic signal good combination property, be convenient to reliably, exactly predict downhole formation information and bit trajectory, operating type is simple and direct, economical, safe and reliable: domestic and international existing drilling earthquake exploration engineering, the random vibration utilizing tooth-wheel bit faint mostly, produce seismic event, jitter, this brings the difficulty being difficult to overcome to the collection of surface seismic ripple, process and explanation, causes drilling earthquake technology to be difficult to be applied in informed drilling decisions.Linear for vibroseis (Chirp) scanning technique and Mini-SOSIE technology (using battering ram as focus) combine by focus pipe nipple of the present utility model, focus is made to inspire controlled linear sweep pulse signal to underground by pulse coding technique, the excitation energy of the every Secondary Shocks of focus is stablized, and the excitation energy consistance of repeat impact is good; And when not disturbing the drilling operation time, according to the needs of geologic prospecting, by regulating automatically controlled flow valve and electric-controlled switch valve to arrange different knocker frequencies and amplitude, the linear increase being separated with control between impact can be made; The signal band produced is wide, and its low-frequency component penetrating capacity is strong, can penetrate thicker overlayer, and radio-frequency component can little impedance layer in finer resolution overlayer, can be used for high-resolution exploration.The mode of placing wave detector by drill bit place near in shaft bottom and earth's surface receives the seismic event that stratum reflects, and processes the seismic event information received.
By above scheme, can effectively solve following problem: deeply convince seismic image before breath and drill bit when (1) obtains more definite, accurately determine the borehole position of passing through multiple reservoir; (2) by pore pressure prediction result before drill bit, avoid drilling well danger, and measure short range salt body in real time; (3) geologic horizon according to the observation, surface seismic section determines bit location, casing point and coring depth is selected more accurate; (4) if install the wave detector locality ripple that reflects of bed interface on focus pipe nipple, the distance of drill bit to reservoir top bottom boundaries can also be determined when horizontal well drilling section, for the monitoring of offset well anti-collision, ensure that drill bit creeps in the optimum position of reservoir.
2, noise is suppressed, avoid interference: linear for vibroseis (Chirp) scanning technique and Mini-SOSIE technology (using battering ram as focus) combine by focus pipe nipple of the present utility model, focus is made to inspire linear sweep pulse signal to underground by pulse coding technique, the seismologic record that the single macro-energy adopting decoding technique the original seismic data of little for this continuous several times energy excitation situation to be converted to equivalence excites, correlation noise can be suppressed, avoid noise on the impact of signals collecting, collection signal more accurately, reliably.
3, the impact of gas medium on ripple is overcome: this focus pipe nipple is connected between drill bit and well dynamic instrument, by the contact of drill bit and earthquake, vibration wave is imported into stratum, can overcome the decay of gas medium to ripple, and gas and the larger reflection coefficient of bed boundary are on the impact of seismic event.
4, improve rock breaking capacity, accelerate bit speed: this focus pipe nipple not only can produce linear sweep pulse signal, simultaneously can also as air forging hammer, the rock fracture in dynamic indentation ability of drill bit is improved on bump stratum, accelerates bit speed.
5, reciprocating motion of the pistons is good: this focus pipe nipple can overcome the problem that air forging hammer exists dead band in horizontal well drilling process, so-called dead-time problem namely in horizontal well drilling process the piston of air forging hammer can not move reciprocatingly normally.
6, applied range: this focus pipe nipple is not only applicable to tooth-wheel bit, is also applicable to PDC drill bit and produces linear sweep pulse signal.
Accompanying drawing explanation
Fig. 1 is the general assembly structural representation of the nearly drill bit bump in a kind of gas drilling of the utility model shaft bottom focus pipe nipple;
Fig. 2 is the structural representation of the nearly drill bit bump in a kind of gas drilling of the utility model shaft bottom focus pipe nipple lower chamber air inlet;
Fig. 3 is the structural representation of the nearly drill bit bump in a kind of gas drilling of the utility model shaft bottom focus pipe nipple upper chamber air inlet;
Fig. 4 be in the utility model automatically controlled flow valve front view partly cut open figure;
Fig. 5 be when gas distribution plate is not installed bottom cylinder block and between distribution base in the utility model front view partly cut open figure and A-A cross section view;
Fig. 6 is the vertical view of gas distribution plate in the utility model;
In figure: 1-shell, 2-lower chamber, 3-piston, 4-cylinder block outer wall, 5-cylinder block inwall, 6-upper chamber, bottom 7-cylinder block, inlet channel under 8-, 9-upper air passage, 10-distribution base, 11-distribution base air intake opening, 12-seal rubber plug, 13-adjuster bar, 14-location division, 15-valve body, 16-stepper motor B, 17-top connection, 18-O-ring seal, 19-stepper motor A, 20-installation shaft, 21-gas distribution plate, the enterprising gas port of 22-, 23-distribution chamber, 24-valve body air intake opening, 25-control system, 26-control system shell, air intake opening under 27-.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described, but protection domain of the present utility model is not limited to the following stated.
As shown in Figure 1, Figure 2 and Figure 3, the nearly drill bit bump in a kind of gas drilling shaft bottom focus pipe nipple, it comprises 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, and described connected mode is taper thread, utilizes taper thread to connect, good seal performance, effectively can prevent Leakage Gas.
Cylinder block is arranged in shell 1, and cylinder block comprises cylinder block outer wall 4, the gentle cylinder base 7 of cylinder block inwall 5, and piston 3 cooperation is arranged between the gentle inboard wall of cylinder block 5 of cylinder block outer wall 4, can to-and-fro movement in cylinder block at the effect lower piston 3 of gas.
Arrange lower inlet channel 8 between cylinder block outer wall 4 and shell 1 inwall, form lower chamber 2 between piston 3 lower end and shell 1 inwall, shell 1 inwall and cooperation place, piston 3 lower end are provided with O-ring seal 18 and prevent Leakage Gas, and lower inlet channel 8 is communicated with lower chamber 2; Be provided with upper air passage 9 on 7 bottom cylinder block, form upper chamber 6 between piston 3 upper end and cylinder block, upper air passage 9 is communicated with upper chamber 6, concrete structure as shown in Figure 1, Figure 2, shown in Fig. 3 and Fig. 5.
Air distributing device comprises gas distribution plate 21, stepper motor A19, distribution base 10 and flow valve.Described gas distribution plate 21 is arranged on cylinder block top, gas distribution plate 21 also coordinates and is arranged in distribution base 10, distribution base 10 cooperation is arranged 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 intake opening 11, and distribution base air intake opening 11 place is provided with flow valve.Described stepper motor A19 output terminal arranges installation shaft 20, and gas distribution plate 21 arranges square mounting hole, and installation shaft 20 is arranged in the square mounting hole of gas distribution plate 21, and stepper motor A19 and gas distribution plate 21 form electric-controlled switch valve.
As shown in Figure 6, inner periphery is arranged described gas distribution plate 21 on four enterprising gas ports 22, excircle and arrange four lower air intake openings 27, enterprising gas port 22 is in the same size with upper air passage 9, and lower air intake opening 27 is in the same size with lower inlet channel 8.Flow valve controls the air inflow of distribution base air intake opening 11, gas is made to enter distribution chamber 23 with certain flow, stepper motor A19 drives gas distribution plate 21 to rotate to an angle, make the gas in distribution chamber 23 enter upper chamber 6 and lower chamber 2 respectively by enterprising gas port 22 and lower air intake opening 27, driven plunger 3 moves reciprocatingly.
As shown in Figure 1, when not needing the piston 3 of pipe nipple inside to move, stepper motor A19 drives gas distribution plate 21 to rotate to an angle, and enterprising gas port 22 is alignd with upper air passage 9, gas directly enters the fluid passage at pipe nipple center through upper chamber 6, finally enters annular space through bit nozzle.
As shown in Figures 2 and 3, when drill bit run into special formation need to carry out drilling earthquake exploration time, stop drilling well also to apply enough the pressure of the drill to drill bit, prevent drill bit under the effect of the powerful impulsive force of piston with ground pull-up coupling.Stepper motor A19 drives gas distribution plate 21 to rotate, lower air intake opening 27 on gas distribution plate 21 in outer toroid is alignd with the lower inlet channel 8 on bottom cylinder block, lower chamber 2 starts air inlet, promote piston 3 to move upward, when piston 3 moves to certain distance, lower chamber 2 starts exhaust, continues to move upward at the effect lower piston 3 of inertia; Move after a segment distance, by stepper motor A19 drive gas distribution plate 21 rotate to an angle the enterprising gas port 22 in gas distribution plate 21 on annulus is alignd with the upper air passage 9 bottom cylinder block time, upper chamber 6 starts air inlet, piston 3 first does retarded motion, then the chopping block impacting pipe nipple inside is downwards accelerated, drive the enterprising gas port 22 of gas distribution plate 21 rotary closing by stepper motor A19 simultaneously, upper chamber 6 starts exhaust, circulate said process successively, makes piston 3 to-and-fro movement produce frequency and the amplitude of seismic exploration needs contentedly.Time although upper chamber 6 starts air inlet, the gas entering upper chamber 6 can flow into lower inlet channel 8, because lower inlet channel 8 is closed, so can not affect upper chamber 6 air inlet to promote moving downward of piston 3.Stopping boring reception seismic event is the impact considering that the vibration of downhole drill bit rotation and DHA excites seismic event and receives, and improves the earthquake reflected wave quality received.
When brill runs into hard stratum, when needing the rock breaking capacity improving drill bit, the chopping block of the to-and-fro movement bump pipe nipple inside of piston 3 under gas effect can also improve the rock breaking capacity of drill bit, thus improves bit speed.
As shown in Figure 1 and Figure 4, described flow valve is automatically controlled flow valve, and it comprises seal rubber plug 12, adjuster bar 13, valve body 15, stepper motor B16 and control system 25.Described valve body 15 is arranged on distribution base 10, valve body 15 lower end is provided with valve body air intake opening 24, valve body air intake opening 24 is communicated with distribution base air intake opening 11, adjuster bar 13 cooperation is arranged in valve body 15, the upper end of adjuster bar 13 is connected with the output terminal of stepper motor B16, and adjuster bar 13 moves up and down the effect realizing fine adjustment gas flow under the drive of stepper motor B16 in valve body 15.Adjuster bar 13 is threaded engagement face with the installed surface that coordinates of valve body 15, the lower end of adjuster bar 13 is provided with seal rubber plug 12, the maximum gauge place of seal rubber plug 12 seals with the inside surface of valve body 15 and contacts, and controls the upper and lower of seal rubber plug 12, reach the object of accurate flow control with revolved pitch.Valve body 15 top is also provided with location division 14, the distance that location division 14 regulating and controlling bar 13 moves down, when the bottom surface, top of adjuster bar 13 touches location division 14, the continuing to be selected into of adjuster bar 13 is obstructed, it is automatically out of service that stepper motor B16 experiences stress, 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 control system 25 arranged outside has control system shell 26.
At pipe nipple inner installation control system 25, automatically controlled flow valve and electric-controlled switch valve, be that the excitation energy consistance of repeat impact is good in order to ensure that the excitation energy of the every Secondary Shocks of focus is stablized; And make to impact the linear increase that can there be control at interval; The signal band produced is wide, and its low-frequency component penetrating capacity is strong, can penetrate thicker overlayer, and radio-frequency component can little impedance layer in finer resolution overlayer, can be used for high-resolution exploration.
During concrete use the utility model, bump focus pipe nipple is connected between drill bit and mud motor, and with drill bit together with DHA in lower going-into-well.When drilling prospection new district, tectonic structure, the stress distinguishingly interval on unclear stratum to be drilled, need before with brill prospecting borehole section piercing, need according to well depth, well type, hole diameter, reservoir pressure, the power of air compressor, gas inject pressure, the in-situ data such as drill bit structure, the pressure of the drill that drilling well section uses, arranges the vibration frequency and the amplitude that produce seismic exploration needs contentedly with brill vibroseis generator.
Finally should illustrate; above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted; those of ordinary skill in the art should be appreciated that the amendment that do not depart from technical solutions of the utility model essence or replaces on an equal basis, all belongs to protection domain of the present utility model.
Claims (9)
1. the nearly drill bit bump in a gas drilling shaft bottom focus pipe nipple, it is characterized in that: it comprises 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), cylinder block is arranged in shell (1), cylinder block comprises cylinder block outer wall (4), cylinder block inwall (5) gentle cylinder base (7), piston (3) cooperation is arranged between cylinder block outer wall (4) gentle inboard wall of cylinder block (5), piston (3) can to-and-fro movement in cylinder block, lower inlet channel (8) is provided with between cylinder block outer wall (4) and shell (1) inwall, lower chamber (2) is formed between piston (3) lower end and shell (1) inwall, lower inlet channel (8) is communicated with lower chamber (2), (7) are provided with upper air passage (9) bottom cylinder block, piston (3) forms upper chamber (6) between upper end and cylinder block, upper air passage (9) is communicated with upper chamber (6), air distributing device comprises gas distribution plate (21), stepper motor A(19), distribution base (10) and flow valve, described gas distribution plate (21) is arranged on cylinder block top, gas distribution plate (21) also coordinates and is arranged in distribution base (10), described gas distribution plate (21) and stepper motor A(19) output shaft be connected, gas distribution plate (21) and stepper motor A(19) form electric-controlled switch valve, distribution base (10) cooperation is arranged 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 intake opening (11), distribution base air intake opening (11) place is provided with flow valve.
2. the nearly drill bit bump in a kind of gas drilling shaft bottom according to claim 1 focus pipe nipple, is characterized in that: described shell (1) and top connection (17) are threaded connection.
3. the nearly drill bit bump in a kind of gas drilling shaft bottom according to claim 2 focus pipe nipple, is characterized in that: described screw thread is taper thread.
4. the nearly drill bit bump in a kind of gas drilling shaft bottom according to claim 1 focus pipe nipple, is characterized in that: described shell (1) inwall and piston (3) cooperation place, lower end are provided with O-ring seal (18).
5. the nearly drill bit bump in a kind of gas drilling shaft bottom according to claim 1 focus pipe nipple, it is characterized in that: described gas distribution plate (21) is along the circumferential direction respectively arranged with several enterprising gas ports (22) and several lower air intake openings (27), described enterprising gas port (22) is corresponding with upper air passage (9), and described lower air intake opening (27) is corresponding with lower inlet channel (8).
6. the nearly drill bit bump in a kind of gas drilling shaft bottom according to claim 1 focus pipe nipple, is characterized in that: described stepper motor A(19) output terminal arranges installation shaft (20), and installation shaft (20) is arranged on the center of gas distribution plate (21).
7. the nearly drill bit bump in a kind of gas drilling shaft bottom according to claim 1 focus pipe nipple, it is characterized in that: described flow valve is automatically controlled flow valve, described automatically controlled flow valve comprises seal rubber plug (12), adjuster bar (13), valve body (15), stepper motor B(16) and control system (25), described valve body (15) is arranged on distribution base (10), valve body (15) lower end is provided with valve body air intake opening (24), valve body air intake opening (24) is communicated with distribution base air intake opening (11), adjuster bar (13) cooperation is arranged in valve body (15), upper end and the stepper motor B(16 of adjuster bar (13)) output terminal be connected, the lower end of adjuster bar (13) is provided with seal rubber plug (12), valve body (15) top arranges location division (14), the distance that location division (14) regulating and controlling bar (13) moves down, stepper motor B(16) be also connected with control system (25).
8. the nearly drill bit bump in a kind of gas drilling shaft bottom according to claim 7 focus pipe nipple, it is characterized in that: described control system (25) is arranged on the inwall of shell (1), and control system (25) arranged outside has control system shell (26).
9. the nearly drill bit bump in a kind of gas drilling shaft bottom according to claim 7 focus pipe nipple, is characterized in that: described adjuster bar (13) is threaded engagement face with the installed surface that coordinates of valve body (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520985386.6U CN205139381U (en) | 2015-12-02 | 2015-12-02 | Nearly drill bit bump seismic source nipple joint in gas drilling shaft bottom |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520985386.6U CN205139381U (en) | 2015-12-02 | 2015-12-02 | Nearly drill bit bump seismic source nipple joint in gas drilling shaft bottom |
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| CN205139381U true CN205139381U (en) | 2016-04-06 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353404A (en) * | 2015-12-02 | 2016-02-24 | 西南石油大学 | Gas drilling shaft bottom near-bit continuous impact focus nipple |
| CN107544088A (en) * | 2017-11-02 | 2018-01-05 | 西南石油大学 | A kind of gas drilling underground controlled source pipe nipple |
| CN108375787A (en) * | 2018-03-02 | 2018-08-07 | 西南石油大学 | It is a kind of to bore the preceding nearly drill bit source pipe nipple detected for gas drilling |
-
2015
- 2015-12-02 CN CN201520985386.6U patent/CN205139381U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353404A (en) * | 2015-12-02 | 2016-02-24 | 西南石油大学 | Gas drilling shaft bottom near-bit continuous impact focus nipple |
| CN107544088A (en) * | 2017-11-02 | 2018-01-05 | 西南石油大学 | A kind of gas drilling underground controlled source pipe nipple |
| CN107544088B (en) * | 2017-11-02 | 2024-01-23 | 西南石油大学 | Underground controllable seismic source nipple for gas drilling |
| CN108375787A (en) * | 2018-03-02 | 2018-08-07 | 西南石油大学 | It is a kind of to bore the preceding nearly drill bit source pipe nipple detected for gas drilling |
| CN108375787B (en) * | 2018-03-02 | 2023-11-14 | 西南石油大学 | Near-bit seismic source nipple for detection before gas drilling |
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