CN115370302B - Passive magnetic steering while drilling system and method - Google Patents
Passive magnetic steering while drilling system and method Download PDFInfo
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- CN115370302B CN115370302B CN202210997452.6A CN202210997452A CN115370302B CN 115370302 B CN115370302 B CN 115370302B CN 202210997452 A CN202210997452 A CN 202210997452A CN 115370302 B CN115370302 B CN 115370302B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Abstract
The invention discloses a passive magnetic steering while drilling system and a passive magnetic steering while drilling method, wherein the system comprises the following steps: the device comprises a drill rod, a non-magnetic component, a screw drill, a drill bit, a discharge system and a passive magnetic guide measurement system; the armored cable is connected with the wet connector female head, and the wet connector male head, the torpedo connector, the discharging system, the horse head and the passive magnetic guide measurement system are sequentially connected; the passive magnetic steering measurement system is fixed in the nonmagnetic component; when the passive magnetic steering measurement operation is needed in the drilling process, a bypass short circuit is installed at the top of the drill rod, the armored cable penetrates out of the interior of the drill rod through a bypass port of the bypass short circuit, the wet joint female head and the connection structure of the wet joint female head are conveyed to the underground through the pumping mode, and the wet joint female head is connected with the wet joint male head in the underground drill rod. The invention can meet the operation of highly deviated wells and horizontal wells, achieve the full coverage of all well types, reduce the tripping and drifting time by measurement while drilling and save the cost; and the passive magnetic steering system while drilling is arranged in the drilling tool, so that the drilling sticking risk can be reduced compared with the conventional open hole well logging.
Description
Technical Field
The invention relates to the technical field of well logging, in particular to a passive magnetic steering while drilling system and a passive magnetic steering while drilling method.
Background
Along with rescue of high-pressure blowout out-of-control wells, plugging of complicated old wells of gas storage reservoirs, scrapping of abandoned wells of old oil zone sleeves, gradual exposure of production requirements of environmental protection well treatment and the like, the domestic technology is also iteratively upgraded from an active magnetic steering drilling technology to a passive magnetic steering drilling technology.
The existing passive magnetic steering tool adopts a cable running-in mode, is limited to open hole measurement, needs to be run in by gravity after being pulled out and drifting, is complex in process and long in running-out operation time, and cannot be used for operation in highly deviated wells (the well inclination angle is larger than 40 degrees) and horizontal wells. In the prior art, no passive magnetic guiding tool while drilling exists, so that a passive magnetic guiding method and a passive magnetic guiding system while drilling are needed to be invented, the requirements of special well type operation are met, and all well types are fully covered.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art and provides a passive magnetic guiding while drilling system and a passive magnetic guiding method.
In order to solve the technical problem, the invention provides a passive magnetic guiding while drilling system, which comprises: the device comprises an armored cable, a wet joint female head, a wet joint male head, a torpedo joint, a discharge system, a horse head, a passive magnetic guide measurement system and a drilling tool assembly; the drilling tool assembly comprises a drilling rod, a transition short joint, a non-magnetic component, a screw drilling tool and a drill bit which are connected in sequence; the wet joint male head is fixed in the transition short circuit, and the passive magnetic steering measurement system is fixed in the non-magnetic component and is arranged close to the screw drilling tool.
The armored cable is connected with the wet connector female head, and the wet connector male head, the torpedo connector, the discharging system, the horse head and the passive magnetic guide measurement system are sequentially connected; or the armored cable, the torpedo joint, the discharging system and the wet joint female joint are sequentially connected, and the wet joint male joint, the horse tap and the passive magnetic guide measurement system are sequentially connected.
When passive magnetic steering measurement operation is needed in the drilling process, a bypass short circuit is installed at the top of the drill rod, the armored cable penetrates out of the interior of the drill rod through a bypass port of the bypass short circuit, the wet joint female head and the connection structure of the wet joint female head are conveyed to the underground in a pumping mode, and the wet joint female head is connected with a wet joint male head in the underground drill rod.
The invention has the beneficial effects that: the method can meet the operation of highly deviated wells and horizontal wells, achieve full coverage of all well types, reduce the tripping and drifting time by measurement while drilling and save the cost; meanwhile, the passive magnetic steering while drilling system is arranged in the drilling tool, so that the risk of sticking the drill bit is reduced compared with the conventional open hole well logging.
Furthermore, the discharge system comprises a discharge electrode, and an insulating joint and an insulating cable which are symmetrically arranged at the upper end and the lower end of the discharge electrode, wherein the discharge electrode is arranged in the drill rod.
The beneficial effect of adopting above-mentioned further scheme is that, the insulating joint and the insulating cable of both ends symmetrical arrangement about the discharge electrode can prevent effectively that electric current from flowing along the axial, avoid secondary induction electromagnetic field.
Furthermore, the upper part of a drill rod internally carrying the discharge electrode is connected with an upper insulating short circuit of the electrode, and the lower part of the drill rod is connected with a lower insulating short circuit of the electrode.
Adopt above-mentioned further scheme's beneficial effect is, the insulating short circuit is all connected to the lower part on the drilling rod that carries the discharge electrode, can prevent effectively that the electric current from flowing along the axial, avoids secondary induction electromagnetic field.
Further, no magnetism component is including the insulating short circuit in magnetism direction upper portion, no magnetism pipe fitting and the insulating short circuit in magnetism direction lower part that connect gradually.
Adopt above-mentioned further scheme's beneficial effect to be, provide no magnetism environment for no magnetism direction measurement system through the insulating short circuit in magnetism direction upper portion, no magnetism pipe fitting and the insulating short circuit in magnetism direction lower part, improve and measure the accuracy.
Further, the drilling tool assembly further comprises a weighted drill rod, and the weighted drill rod is connected between the electrode lower portion insulation short circuit and the magnetic guide upper portion insulation short circuit.
Further, the drilling tool assembly further comprises a float valve and an MWD measurement while drilling instrument, wherein the float valve and the MWD measurement while drilling instrument are installed between the magnetic guide lower insulation short circuit and the screw drilling tool.
The further scheme has the advantages that the floating valve is added to prevent the drilling fluid from being sprayed upwards, and the MWD measurement while drilling instrument can measure the drilling related data while drilling.
Furthermore, the non-magnetic pipe fitting adopts a non-magnetic drill collar, a non-magnetic casing, a non-magnetic drill rod or a non-magnetic sieve tube.
Adopt above-mentioned further scheme's beneficial effect be, be fixed in no magnetism pipe fitting with passive magnetic guide measurement system, avoided passive magnetic guide measurement system during operation, to signal interference.
Furthermore, the passive magnetic steering measurement system comprises a non-magnetic shell, and a measurement probe tube is arranged in the non-magnetic shell.
Furthermore, a gyro probe is fixed in the nonmagnetic shell.
In order to solve the technical problem, the invention provides a passive magnetic steering while drilling method, which is realized by the passive magnetic steering while drilling system based on the technical scheme, and comprises the following steps: when passive magnetic steering measurement operation is needed in a drilling process, a bypass short circuit is installed at the top of the drill rod, an armored cable penetrates out of the interior of the drill rod through a bypass port of the bypass short circuit, and a wet joint female head is conveyed to the underground in a pumping mode and is connected with a wet joint male head in the underground drill rod; and transferring current serving as a signal to a discharge electrode, instantaneously exciting polarization and injecting the polarization into a stratum, measuring a target well magnetic field signal through a passive magnetic steering measurement system, and transmitting the measured signal to a wellhead.
Additional aspects of the invention and its advantages will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic structural diagram of a passive magnetic steering while drilling system provided in embodiment 1 of the present invention;
fig. 2 is a schematic diagram of an internal structure of a passive magnetic steering while drilling system according to embodiment 1 of the present invention;
FIG. 3 is a schematic structural diagram of a passive magnetic steering while drilling system provided in embodiment 2 of the present invention;
fig. 4 is a schematic view of an internal structure of a passive magnetic steering while drilling system provided in embodiment 2 of the present invention;
FIG. 5 is a schematic diagram of a vertical well measurement of a passive magnetic steering while drilling system according to an embodiment of the present invention;
fig. 6 is a horizontal well measurement schematic diagram of the passive magnetic steering while drilling system according to the embodiment of the invention.
Detailed Description
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure of the present disclosure. It is to be understood that the described embodiments are merely some embodiments of the disclosure, and not all embodiments. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the disclosure, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
Example 1
As shown in fig. 1, a passive magnetic steering while drilling system provided by an embodiment of the present invention includes: the device comprises an armored cable 14, a wet joint female head 15, a wet joint male head 16, a torpedo joint 17, a discharge system, a bridle 19, a passive magnetic guide measurement system 20 and a drilling tool assembly; the drilling tool assembly comprises: the drilling tool comprises a drilling rod 1, a bypass short circuit 2, a transition short circuit 3, an electrode upper insulating short circuit 4, an electrode lower insulating short circuit 5, a weighted drilling rod 6, a magnetic guide upper insulating short circuit 7, a non-magnetic drill collar 8, a magnetic guide lower insulating short circuit 9, a float valve 10, an MWD measurement while drilling instrument 11, a screw drilling tool 12 and a drilling bit 13, wherein the drilling tool combination can also be one of the parts.
The internal structure of the passive magnetic guiding system while drilling is divided into an upper part and a lower part, the butt joint is realized through a wet joint female head 15 and a wet joint male head 16, and the upper part and the lower part are divided into two modes as shown in fig. 2 and fig. 4.
As shown in fig. 2, the upper member in this embodiment includes an armored cable 14 and a wet joint female 15 connected in series. The lower component comprises a wet joint male head 16, a torpedo joint 17, a discharge system, a halyard 19 and a passive magnetic guide measurement system 20 which are connected in sequence. The wet joint male head 16 is fixedly arranged in the transition short circuit 3, and the lower lead is connected with the discharge system through a torpedo joint 17. The passive magnetic steering measurement system 20 is installed inside the non-magnetic drill collar 9 and is arranged close to the screw drill 12, and the non-magnetic drill collar 8 can also adopt a non-magnetic casing pipe, a non-magnetic drill rod, a non-magnetic sieve pipe and other non-magnetic pipe fittings. The passive magnetic guide measurement system 20 includes a non-magnetic casing, a measurement probe is disposed in the non-magnetic casing, and a gyro probe can be fixed in the non-magnetic casing.
The discharge electrode 18 is arranged at the upper end of the passive magnetic guide measurement system 20 and is arranged in the drill rod 1, and the discharge electrode 18 can also be arranged in other tools such as sieve tubes and the like according to the requirements of different operation scenes. Wherein the discharge electrode 18 is arranged in the middle of the discharge system, and in order to prevent the current from flowing along the axial direction, the upper and lower ends of the discharge electrode 18 are sequentially and symmetrically provided with insulating joints and insulating cables. The upper part of a drill rod carrying a discharge electrode 18 is connected with an electrode upper part insulation short circuit 4, the lower part of the drill rod is connected with an electrode lower part insulation short circuit 5, axial current flowing is shielded, and a secondary induction electromagnetic field is avoided. The lower insulating cable of the discharge system is connected with a passive magnetic steering measurement system 20 through a bridle 19, the upper part of the discharge system is connected with an underground armored cable through a torpedo connector 17, and the underground armored cable on the ground is connected with the underground cable through a wet connector female head 15 and a wet connector male head 16.
When passive magnetic steering measurement operation is needed in a drilling process, the bypass short circuit 2 is installed at the top of the drill rod 1, the armored cable 14 penetrates out of the interior of the drill rod 1 through a bypass port of the bypass short circuit 2, the wet joint female head 15 and the connection structure of the wet joint female head are conveyed to the underground in a pumping mode, and the wet joint female head is connected with a wet joint male head 16 in the underground drill rod. The power is supplied to the discharge electrode 18 of the discharge system, and the power supply and the communication between the passive magnetic guide measurement system and the ground are realized.
As shown in fig. 5 and fig. 6, during measurement, for different lithologic strata and different fluid media, current serving as a signal is sequentially transmitted to the discharge electrode 18 through the ground armored cable, the wet joint female head, the wet joint male head, the underground armored cable, the torpedo joint, the insulated cable and the insulated joint, polarization is excited instantly, the current is injected into the strata efficiently, long-distance low-frequency periodic discharge of ferromagnetic substances in a target well is realized by crossing the strata in a short time, the resistance of the target well is low, an induced electromagnetic field can be generated by the current flowing in the target well, a passive magnetic steering measurement system 20 can measure a magnetic field signal of the target well, and the measured signal is transmitted to a wellhead through the cable.
The upper drill string adopts an existing structure or an alternative structure (including but not limited to a communication drill rod and a coiled tubing) to realize the functions of signal transmission, discharge and the like.
In one embodiment, the passive magnetic steering while drilling system comprises a drill bit 13, a screw drill 12, a MWD11, a float valve 10, a magnetic steering lower insulating short circuit 9, a non-magnetic drill collar 8 with a built-in passive magnetic steering measurement system 20 and a bridle 19, a magnetic steering upper insulating short circuit 7, a weighted drill pipe 6, an electrode lower insulating short circuit 5, an electrode upper insulating short circuit 4, a transition short circuit 3 with a built-in wet joint male head 16, a built-in discharge electrode 18 and a drill pipe 1 with a torpedo joint 17 in sequence from bottom to top. During the drilling process, along with the rotation of a drill bit 13, a screw drill 12, an MWD11, a float valve 10, a magnetic guide lower insulation short circuit 9, a non-magnetic drill collar 8, a magnetic guide upper insulation short circuit 7, a weighted drill rod 6, an electrode lower insulation short circuit 5, an electrode upper insulation short circuit 4, a transition short circuit 3 and a drill rod 1, a passive magnetic guide measuring system 20, a bridle 19, a discharging system, a torpedo joint 17 and a wet joint male joint 16 connected with the passive magnetic guide measuring system move along with the rotation. When passive magnetic steering measurement operation is needed in the drilling process, a bypass short section 2 is connected into a well mouth, the bypass short section is opened, a wet joint female head 15 and an armored cable 14 are placed into a well mouth drill rod 1, the wet joint female head 15 is driven by the ground armored cable 14 to be sent underground in a pumping mode, the wet joint female head is connected with a wet joint male head 16 in the underground drill rod 1, the underground passive magnetic steering measurement system 20 is achieved, the discharge system is integrally communicated with a ground system, measurement operation is finally achieved, after measurement is completed, the ground armored cable 14 is recovered through a measurement winch, and the wet joint female head 15 is also recovered synchronously.
After the drill bit 13 and the screw drill 12 are installed and are put into a wellhead, the non-magnetic drill collar 8 with the built-in passive magnetic guide measurement system 20, the bridle 19 and part of the insulated cables is connected with the float valve 10 through the upper shackle system, the non-magnetic drill collar 8 is put into the wellhead through the lower operation system, the drill rod 1 with the built-in insulated cables, the built-in insulated nipples and the built-in discharge electrodes 18 is connected and put into a tool string through the upper shackle system and the lower operation system, and after the lower operation is finished, the drill rod required for normal drilling is connected and drilling is started. When the magnetic steering measurement operation needs to be started after the drilling is carried out to the specified depth, the drilling is stopped, the circulation of the drilling fluid is stopped, the drill string does not need to be pulled down, only a wellhead bypass valve needs to be opened, the wet joint female head 15 and the ground armored cable 14 are placed into a wellhead drill rod, the circulation of the drilling fluid is started, the wet joint female head 15 is driven by the ground armored cable 14 to be put into the underground in a pumping mode under the pushing of the drilling fluid until the wet joint female head 15 is in butt joint with the wet joint male head 16, and the integral communication of the passive magnetic steering system is completed. And starting to perform discharging operation and measuring operation, finishing the measuring operation of the magnetic guide system, pulling out the ground armored cable 14 and the wet joint female head 15, closing the bypass, and continuing drilling according to the operation instruction of the magnetic guide until the target is finished.
Example 2
As shown in fig. 3, this embodiment differs from the embodiment shown in fig. 1 in that: the transition short circuit 3 is connected between the magnetic guide upper insulation short circuit 7 and the non-magnetic drill collar 8. As shown in fig. 4, this embodiment differs from the embodiment shown in fig. 2 in that: the upper component comprises an armored cable 14, a torpedo joint 17, a discharging system and a wet joint female head 15 which are sequentially connected, and the lower component comprises a wet joint male head 16, a bridle 19 and a passive magnetic guide measuring system 20 which are sequentially connected; the wet joint male head 16 is fixedly arranged in the transition short circuit 3, and the lower lead is connected with a passive magnetic guide measurement system 20 through a horse head 19; the passive magnetic steering measurement system 20 is installed inside the non-magnetic drill collar 9 and arranged close to the screw drill, and the non-magnetic drill collar 8 can also adopt a non-magnetic casing pipe, a non-magnetic drill rod, a non-magnetic sieve pipe and other non-magnetic pipe fittings.
Wherein discharge electrode 18 arranges in discharge system middle part, for preventing that the electric current from flowing along the axial, symmetrical arrangement insulating joint and insulating cable in proper order in discharge electrode 18 upper and lower both ends, carry the drilling rod upper end and the lower extreme of discharge electrode 18 and arrange insulating short circuit respectively, shield the axial current flow, avoid secondary induction electromagnetic field. The upper insulating cable of the discharging system is connected with the armored cable 14 through a torpedo connector 17, the lower insulating cable is connected with a wet connector female head 15, and a wet connector male head 16 is connected with a passive magnetic guide measuring system 20 through a horse head 19.
When passive magnetic steering measurement operation is needed in a drilling process, the bypass short circuit 2 is installed at the top of the drill rod 1, the armored cable 14 penetrates out of the interior of the drill rod 1 through a bypass port of the bypass short circuit 2, the wet joint female head 15 and the connection structure of the wet joint female head are conveyed to the underground in a pumping mode, and the wet joint female head is connected with a wet joint male head 16 in the underground drill rod. The power is supplied to the discharge electrode 18 of the discharge system, and the power supply and the communication between the passive magnetic guide measurement system and the ground are realized.
In one embodiment, the passive magnetic steering while drilling system comprises a drill bit 13, a screw drill 12, a MWD11, a float valve 10, a magnetic steering lower insulating short circuit 9, a non-magnetic drill collar 8 with a built-in passive magnetic steering measurement system 20 and a bridle 19, a transition short circuit 3 with a built-in wet joint male head 16, a magnetic steering upper insulating short circuit 7, a weighted drill rod 6, an upper electrode lower insulating short circuit 5, an upper electrode insulating short circuit 4, a drill rod 1 with a built-in discharge electrode 18 and a torpedo joint 17 in sequence from bottom to top. In the drilling process, along with the rotation of a drill bit 13, a screw drill 12, an MWD11, a floating valve 10, a magnetic guide lower insulation short circuit 9, a non-magnetic drill collar 8, a transition short circuit 3, a magnetic guide upper insulation short circuit 7, a weighted drill rod 6, an electrode lower insulation short circuit 5, an electrode upper insulation short circuit 4 and a drill rod 1, a passive magnetic guide measuring system 20, a bridle 19 and a wet joint male head 16 also move along with the rotation. When passive magnetic steering measurement operation is needed in a drilling process, a well mouth is connected with a bypass short section, the bypass short section is opened, a wet joint female head 15 is provided with a discharge system, a torpedo joint 17 and a ground armored cable 14 are placed into a well mouth drill rod, the wet joint female head 15 is provided with the discharge system in a pumping mode, the torpedo joint 17 and the ground armored cable 14 are sent to the underground, the wet joint female head 16 in the underground drill rod is connected, the integral communication of the underground passive magnetic steering system 20 and the discharge system and the ground system is realized, the measurement operation is finally realized, after the measurement is completed, the ground armored cable 14 is recovered through a measurement winch, and the torpedo joint 17, the discharge system and the wet joint female head 15 are also synchronously recovered.
The passive magnetic guiding system while drilling provided by the embodiment is arranged in the drilling tool, so that the drilling and drifting are not required during measurement, and the cost is saved; the magnetic steering tool can be used in highly deviated wells (the well inclination angle is more than 40 degrees) and horizontal wells, and the application range of the magnetic steering tool is expanded; insulating joints and insulating cables are symmetrically arranged at the upper end and the lower end of the discharge electrode 18, and insulating short sections are arranged at radial positions, so that the problem of current conduction up and down along a drill string is effectively solved through double-insulation arrangement; in the normal drilling process, the passive magnetic steering measurement system is arranged in the drilling tool, so that normal drilling is not influenced, and the drilling fluid can flow in a hollow space formed by the passive magnetic steering measurement system and the drilling tool; the passive magnetic steering measurement system is arranged in the drilling tool, and compared with the conventional open hole well logging, the risk of sticking the drill bit can be reduced.
The embodiment of the invention provides a passive magnetic steering while drilling method, which is realized by the passive magnetic steering while drilling system based on the technical scheme and comprises the following steps: when passive magnetic steering measurement operation is needed in a drilling process, a bypass short circuit 2 is installed at the top of a drill rod 1, an armored cable 14 penetrates out of the interior of the drill rod 1 through a bypass opening of the bypass short circuit 2, a wet joint female head 15 is conveyed to the underground in a pumping mode and is connected with a wet joint male head 16 in the underground drill rod; the current is transmitted as a signal to the discharge electrode 18, momentarily induced polarization is injected into the formation, a target well magnetic field signal is measured by the passive magnetic steering measurement system 20, and the measured signal is transmitted to the wellhead.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A passive-while-drilling magnetic steering system, comprising: the device comprises an armored cable (14), a wet joint female head (15), a wet joint male head (16), a torpedo joint (17), a discharge system, a bridle head (19), a passive magnetic guide measurement system (20) and a drilling tool assembly; the drilling tool assembly comprises a drilling rod (1), a transition short joint (3), a non-magnetic component, a screw drilling tool (12) and a drill bit (13) which are connected in sequence; the wet joint male head (16) is fixed in the transition short circuit (3), and the passive magnetic guide measurement system (20) is fixed in a non-magnetic component and is arranged close to the screw drilling tool (12);
the armored cable (14) is connected with the wet joint female head (15), and the wet joint male head (16), the torpedo joint (17), the discharging system, the bridle head (19) and the passive magnetic guide measuring system (20) are sequentially connected; or the armored cable (14), the torpedo joint (17), the discharging system and the wet joint female head (15) are sequentially connected, and the wet joint male head (16), the faucet (19) and the passive magnetic guide measuring system (20) are sequentially connected;
when passive magnetic steering measurement operation is needed in the drilling process, a bypass short circuit (2) is installed at the top of the drill rod (1), the armored cable (14) penetrates out of the drill rod (1) through a bypass port of the bypass short circuit (2), the wet joint female head (15) and the connection structure of the wet joint female head are conveyed to the underground in a pumping mode, and the wet joint female head is connected with a wet joint male head (16) in the underground drill rod.
2. The passive magnetic while drilling steering system according to claim 1, wherein the discharge system comprises a discharge electrode (18), and an insulated joint and an insulated cable, wherein the upper end and the lower end of the discharge electrode (18) are symmetrically arranged, and the discharge electrode (18) is arranged in a drill rod.
3. The passive while drilling magnetic steering system according to claim 2, wherein the upper part of the drill pipe carrying the discharge electrode (18) inside is connected with the upper electrode insulation short circuit (4), and the lower part is connected with the lower electrode insulation short circuit (5).
4. The passive while drilling magnetic steering system according to claim 3, wherein the non-magnetic member comprises a magnetic steering upper insulating short circuit (7), a non-magnetic pipe (8) and a magnetic steering lower insulating short circuit (9) which are connected in sequence.
5. The passive while drilling magnetic steering system according to claim 4, wherein the drilling assembly further comprises a weighted drill pipe (6), the weighted drill pipe (6) connected between the lower electrode insulating sub (5) and the upper magnetic steering insulating sub (7).
6. The passive while drilling magnetic steering system according to claim 5, wherein the drilling assembly further comprises a float valve (10) and an MWD while drilling gauge (11), the float valve (10) and MWD while drilling gauge (11) being secured between the magnetic steering lower insulation short (9) and the screw drill (12).
7. The passive-while-drilling magnetic steering system according to claim 4, wherein the non-magnetic pipe fitting (8) adopts a non-magnetic drill collar, a non-magnetic casing, a non-magnetic drill pipe or a non-magnetic screen pipe.
8. The passive magnetic steering while drilling system according to any one of claims 1 to 7, wherein the passive magnetic steering measurement system (20) comprises a nonmagnetic housing with a measurement probe built-in.
9. The passive while drilling magnetic steering system of claim 8, wherein a gyro probe is further secured within the nonmagnetic housing.
10. A passive-magnetic-while-drilling steering method, which is realized based on the passive-magnetic-while-drilling steering system of any one of claims 1 to 9, and comprises the following steps:
when passive magnetic steering measurement operation is needed in a drilling process, a bypass short circuit (2) is installed at the top of a drill rod (1), an armored cable (14) penetrates out of the drill rod (1) through a bypass port of the bypass short circuit (2), a wet joint female head (15) is conveyed to the underground in a pumping mode and is connected with a wet joint male head (16) in the underground drill rod;
the current as a signal is transmitted to a discharge electrode (18) of a discharge system, the instantaneous induced polarization is injected into the formation, a target well magnetic field signal is measured by a passive magnetic steering measurement system (20), and the measured signal is transmitted to the wellhead.
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| CN101713286B (en) * | 2009-11-04 | 2013-05-01 | 中国石油大学(北京) | Electromagnetic system for detecting distance between adjacent wells while drilling |
| CN102536204B (en) * | 2012-01-11 | 2015-02-18 | 中国地质大学（武汉） | Method for increasing transmitting efficiency of electromagnetic wave wireless measurement-while-drilling system by aid of multiple insulation short pieces |
| CN106014391B (en) * | 2016-07-26 | 2023-03-28 | 奥瑞拓能源科技股份有限公司 | Near-bit measurement while drilling system |
| CN109057780B (en) * | 2018-07-12 | 2024-04-05 | 东营市创元石油机械制造有限公司 | Electromagnetic wave measurement while drilling system with wired communication in petroleum drilling |
| CN210343256U (en) * | 2019-07-11 | 2020-04-17 | 中国石油集团渤海钻探工程有限公司 | Multifunctional drilling tool combination for petroleum drilling |
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