WO2018018712A1 - 一种近钻头随钻测量系统 - Google Patents
一种近钻头随钻测量系统 Download PDFInfo
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- WO2018018712A1 WO2018018712A1 PCT/CN2016/098445 CN2016098445W WO2018018712A1 WO 2018018712 A1 WO2018018712 A1 WO 2018018712A1 CN 2016098445 W CN2016098445 W CN 2016098445W WO 2018018712 A1 WO2018018712 A1 WO 2018018712A1
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- drilling
- measuring
- measurement
- motor
- bit
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- 238000005553 drilling Methods 0.000 title claims abstract description 135
- 238000005259 measurement Methods 0.000 title claims abstract description 68
- 230000005540 biological transmission Effects 0.000 claims abstract description 95
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 230000002265 prevention Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 6
- 238000012937 correction Methods 0.000 abstract description 5
- 238000011084 recovery Methods 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 7
- 239000000523 sample Substances 0.000 description 5
- 239000010410 layer Substances 0.000 description 4
- 230000002708 enhancing effect Effects 0.000 description 3
- 238000000691 measurement method Methods 0.000 description 3
- 230000008054 signal transmission Effects 0.000 description 3
- 230000000703 anti-shock Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/02—Determining slope or direction
- E21B47/024—Determining slope or direction of devices in the borehole
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B17/03—Couplings; joints between drilling rod or pipe and drill motor or surface drive, e.g. between drilling rod and hammer
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B17/20—Flexible or articulated drilling pipes, e.g. flexible or articulated rods, pipes or cables
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/02—Determining slope or direction
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/06—Deflecting the direction of boreholes
- E21B7/068—Deflecting the direction of boreholes drilled by a down-hole drilling motor
Definitions
- the invention belongs to the field of drilling technology.
- directional well technology is an important technology to improve oil recovery and stabilize oilfield production. Especially for complex oil and gas reservoirs, the drilling rate and well trajectory control have always been the main factors restricting the reduction of drilling and production costs. Accurate measurement of the formation information of the bit while drilling is decisive for improving the drilling rate and well trajectory control.
- geological tracking and guiding technology has become indispensable in the development of directional wells.
- the directional well geosteering tracking technology uses the actual geological features of the well to determine and control the well trajectory and accurately control the target level of the downhole drilling tool.
- the directional well drills the best target horizon, that is, the effective reservoir.
- the key technology is controlled in the well trajectory to ensure that the drill bit travels through the effective reservoir, and the interlayer is avoided as much as possible.
- the conventional measurement while drilling measurement method is set on the upper part of the motor.
- the measurement position is more than 10 meters away from the lower end surface of the motor system.
- the formation data of the position of the drill bit cannot be accurately measured in real time because it is far away from the drill bit.
- the information causes the drill bit to pass through the reservoir, especially the thin oil and gas reservoirs.
- the use of the conventional near-drill-while-drilling measurement method can overcome the shortcomings of not being able to accurately measure the formation data information of the drill bit in real time. It is that the near-bit drill-while-drilling measurement sub-section is placed in the lower part of the motor system and directly connected to the drill bit to make the measurement position. Close to the drill bit, but because the measurement of the short section while drilling between the drill bit and the motor system lengthens the distance between the drill bit and the motor bending point, thereby reducing the controllability of the drill bit and increasing the friction of the drill at the bottom of the well. And torque and vibration when the drill bit is working.
- the conventional near-bit drilling measurement method increases the near-bit drill while measuring the short section, the mechanical structure of the downhole drilling assembly changes, resulting in a change in the mechanical properties of the drilling tool, thereby reducing the drilling ability of the drilling tool, resulting in the drilling tool to the well trajectory
- the control ability is insufficient, and the correction is often too long due to the hysteresis of the well trajectory control.
- the impact of the vibration of the drill bit while working at the bottom of the well exacerbates damage to downhole tools such as drill bits.
- the wireless transmitting signal must pass through the obstacle of the screw drilling system, the transmission distance is long, and the stability and reliability of the signal transmission are poor.
- the object of the present invention is to provide a method for measuring the formation data near the drill bit in order to more accurately obtain the data information of the bit location layer and the well trajectory parameter in real time in real time in view of the above problems in the field of drilling.
- Drilling measurement system to improve drill bit drilling rate and maintain high drilling tool guiding control ability, enhance wellbore trajectory controllability, increase production rate and reduce drilling cost.
- a near bit drilling while drilling measuring system comprising a motor system, a measuring transmission system, a wireless receiving system, a non-magnetic shorting
- the motor system is composed of an outer casing and an inner rotating part, and the non-magnetic shorting is arranged in the Above the motor system, and the non-magnetic shorting is directly connected or connected to the drilling or shorting between the motor system, the internal rotating part of the motor system is internally provided with a hole, and the measuring transmission system includes the measurement of the collecting and measuring data.
- the launching device is disposed at an upper portion of the inner rotating portion of the motor system and extends into the non-magnetic inner cavity to measure the transmission system phase
- the rotating part of the motor system is fixed and can rotate with the rotating part together with the outer casing of the motor system;
- the wireless receiving device of the wireless receiving system is disposed in the non-magnetic shorting and is fixed relative to the non-magnetic short circuit, when the motor system is working, The measurement transmission system rotates relative to
- the measuring device is disposed within a distance of 1.5 meters from the lower end surface of the motor system. As a further preferred, the measuring device is disposed within a distance of 1 meter from the lower end surface of the motor system.
- the motor system is a screw drilling system.
- the screw drilling system provides high torque and speed, excellent pilot drilling capability, and is an excellent motor tool for directional drilling.
- the screw drilling tool system has a compact structure and is suitable for directional wells and slave wells. Together with the measurement while drilling system, it can accurately perform the inclination, orientation and rectification, which can improve the engineering quality and reduce the drilling cost.
- the rotating portion of the screw drilling tool system includes at least a transmission shaft, a flexible shaft and a screw motor rotor, and the measuring device is disposed inside the transmission shaft of the screw drilling system, fixed relative to the transmission shaft, and can be coupled with the transmission shaft Turn.
- the drive shaft of the screw drilling system is directly connected to the drill bit, and the measuring device is close to the drill bit, which can more accurately measure the data information of the ground layer where the drill bit is located in real time.
- the measuring device is arranged inside the transmission shaft without increasing the distance between the drill bit and the bending point of the motor, thereby enhancing the guiding controllability of the drill bit and reducing the increase of the drilling tool due to the addition of short joints (tools) between the drill bit and the motor.
- the drilling tool maintains high inclination and correction ability, ensures the quality of the well trajectory, reduces the drilling cost, increases the recovery rate, reduces the drilling pressure transmission resistance, improves the drilling efficiency, and reduces the impact force of the drill bit at the bottom of the well, thereby Reduce damage caused by vibration shocks of downhole tools such as drill bits.
- the launching device is disposed at an upper portion of the screw motor rotor, fixed relative to the screw motor rotor, and rotatable with the screw motor rotor.
- the transmitting device is disposed at an upper portion of the screw motor rotor to bring the transmitting device close to the receiving device of the wireless receiving system, and the signal transmission between the transmitting device and the receiving device is unobstructed, and the entire measuring transmission system can effectively protect the measurement along with the bit rotation. Transmission system.
- the power supply device of the measurement transmission system is disposed within the bore of the inner rotating portion of the motor system and between the measuring device and the launching device, relatively closer to the launching device.
- the power supply unit provides a reliable energy supply for the measurement transmission system and ensures continuous and stable operation of the measurement transmission system.
- the measuring device includes an azimuth gamma sensor that acquires azimuth gamma data and a well slanting sensor that measures well deviation data.
- the azimuth gamma data and the well deviation data of the drill bit location are the main and most important basic data in the drilling. It directly determines the quality of the wellbore trajectory and the drill bit rate, which affects the production rate and drilling cost.
- an anti-drop assembly is disposed between the motor system and the non-magnetic shorting, the anti-drop assembly includes a short-circuit prevention and a anti-drop cap, and the anti-drop cap center has an axial through hole Provided in an upper portion of the inner rotating portion of the motor system and fixed, the transmitting device of the measuring transmission system passes through the through hole in the middle of the anti-drop cap and protrudes into the non-magnetic anti-shocking inner cavity, the anti-drop
- the short connecting portion is connected to the outer casing of the motor system, the upper portion is connected to the non-magnetic shorting connection, and the lower end inner wall is provided with a limiting shoulder; the upper end outer wall of the anti-drop cap is provided with a flange, and the flange is provided Abutting at the limiting shoulder when the lower casing is broken.
- the anti-drop assembly can prevent the drilling system system from falling to the bottom of the well when it is broken, thereby increasing the salvage cost, reducing the risk of drilling and improving the safety
- the non-magnetic shorting is a non-magnetic drill collar, and when the non-magnetic shorting is directly connected to the motor system, the launching device of the measuring transmission system extends into the inner cavity of the non-magnetic drill collar.
- the wireless transmission signal between the transmitting device and the receiving device of the patent has a magnetic short circuit that interferes with and affects the stable and reliable transmission of the wireless signal.
- the non-magnetic drill collar can be used as a part of the drill string, which has a righting effect and does not affect the transmission of wireless signals.
- the beneficial effects of the present invention the near-bit drill-while-drilling measurement system of the present invention, by providing a measuring device in a portion of the motor system close to the drill bit, enables the drill bit to more accurately measure the real-time data information of the formation where the drill bit is located during the drilling process and The well trajectory parameters and wirelessly transmit the measured data information to the receiving device of the wireless receiving system in a stable and reliable manner in real time.
- the measurement while drilling system is placed inside the motor system to maintain the high skew and skew correction capability of the drill.
- the measuring position is within 2 meters (or even shorter, within 1.5 meters and 1 meter) of the lower end surface of the motor system and is close to the drill bit, and the position of the drill bit can be accurately measured in real time during the drilling process.
- the formation data information can effectively prevent the drill bit from penetrating the oil and gas reservoirs, especially the thin oil and gas reservoirs, greatly improving the oil layer drilling rate and describing the well trajectory without lag.
- the measuring device is arranged between the drill bit and the oblique point, and does not affect the drilling.
- the distance between the head and the bend (no need to add any shorts or tools between the drill bit and the motor, the distance between the drill and the motor and the bend does not increase), thus enhancing the controllability of the drill bit and reducing the drill bit and the motor
- the addition of short joints (tools) increases the friction and torque of the drill at the bottom of the well and reduces the vibration of the drill bit during operation.
- the drilling tool maintains high inclination and correction ability, ensures the quality of the well trajectory, reduces the drilling cost and improves the recovery rate; reduces the drilling pressure transmission resistance, improves the drilling efficiency, and reduces the vibration impact force of the drill bit at the bottom of the well, thereby Reduce damage caused by vibration shocks of downhole tools such as drill bits.
- the wireless signal does not need to pass through the screw drilling tool system, but directly passes through the transmission device of the measuring transmission system (wired transmission)
- the transmitting device is transmitted to the receiving device near the receiving device of the wireless receiving system, and then wirelessly transmitted to the receiving device, so that the wireless transmission distance of the data is greatly shortened and the transmission channel is unobstructed, thereby enhancing the stability and reliability of the signal transmission.
- the near-bit drill-while-drilling measurement system of the invention has a compact structure, and the measurement transmission system is disposed inside the motor system, and the data information and the well trajectory parameters of the bit layer of the drill bit are accurately obtained in real time without changing the structure of the drill assembly.
- the problem is to improve the drill bit drilling rate and maintain a high drill guiding control ability, enhance the controllability of the well trajectory, increase the recovery rate, and reduce the drilling cost.
- the proximity transmission wireless communication transmission between the transmitting device of the measurement transmission system and the receiving device of the receiving system is realized, the near-measurement near-transmission of the measurement data is realized, and the stability and reliability of the data transmission are improved.
- the measuring device of the invention is close to the drill bit, and the closer the measuring device is to the drill bit, the more accurately the drill bit can measure the real-time data information and the well trajectory parameters of the formation at the position of the drill bit during the drilling process, the drill bit drilling rate and the mining rate. The higher.
- Embodiment 1 is a schematic structural view of Embodiment 1 of the present invention.
- FIG. 2 is a schematic view of a transmission shaft assembly of a near-bit drilling while drilling measuring system according to Embodiment 3 of the present invention.
- FIG 3 is a schematic view of a cardan shaft assembly of a near-bit drilling while drilling measuring system according to Embodiment 4 of the present invention.
- FIG. 4 is a schematic view of a screw motor assembly of a near-bit drilling while drilling measuring system according to Embodiment 5 of the present invention.
- FIG. 5 is a schematic diagram of the anti-drop assembly of the near-bit drill while drilling measurement system according to Embodiment 6 of the present invention.
- a near bit while drilling measurement system 10 includes a motor system 20, a measurement transmission system 6, a wireless receiving system 5, and a non-magnetic shorting 7.
- the motor system 20 is composed of an outer casing and an inner rotating portion, the non-magnetic shorting 7 is disposed above the motor system 20, and the non-magnetic shorting 7 and the motor system 20 are directly connected or connected to the drill or Shortly, the inside of the inner rotating portion of the motor system 20 is provided with a hole, and the measuring transmission system 6 includes measuring means 61 for collecting and measuring data, and transmitting the data of the measuring device 61 to the transmitting device 64 of the wireless receiving system 5.
- the data of the measuring device 61 is transmitted to the transmitting device 62 of the transmitting device 64, and the power device 63 for supplying power to the measuring device 61 and the transmitting device 64, and the measuring device 61 and the transmitting device 62 of the measuring transmission system 6 are disposed in the motor system Within the bore of the inner rotating portion of the 20, wherein the measuring device 61 is disposed within the lower 1/3 position of the motor system 20 and within 2 meters of the lower end surface of the motor system 20; the launching device of the measurement transmission system 6 64 is disposed at an upper portion of the inner rotating portion of the motor system 20 and extends into the non-magnetic inner cavity, and the measuring transmission system 6 is fixed relative to the rotating portion of the motor system 20, and is rotatable relative to the outer casing of the motor system 20 along with the rotating portion;
- the wireless receiving device 51 of the wireless receiving system 5 is disposed in the non-magnetic shorting 7 and fixed relative to the non-magnetic shorting 7.
- the measuring device 61 is disposed within a distance of 1.5 meters from the lower end surface of the motor system 20. As a further preference, the measuring device 61 is disposed within a distance of 1 m from the lower end surface of the motor system 20.
- the motor system 20 is a screw drilling system.
- the rotating portion of the screw drilling tool system includes at least a transmission shaft 11, a cardan shaft 22 and a screw motor rotor 32.
- the measuring device 61 is disposed inside the transmission shaft 11 of the screw drilling system, and is fixed relative to the transmission shaft 11. It can rotate with the drive shaft 11.
- the launching device 64 is disposed at an upper portion of the screw motor rotor 32, fixed relative to the screw motor rotor 32, and rotatable with the screw motor rotor 32.
- the power supply unit 63 of the measurement transmission system 6 is disposed in the hole of the internal rotating portion of the motor system 20 and between the measuring device 61 and the transmitting device 64, relatively closer to the transmitting device 64, and is a measuring device. 61 and transmitting device 64 provide electrical energy.
- the measuring device 61 comprises an azimuth gamma sensor that acquires azimuth gamma data and a well slanting sensor that measures the slanting data.
- the non-magnetic shorting 7 is a non-magnetic drill collar.
- the transmitting device 64 of the measuring transmission system 6 projects into the inner cavity of the non-magnetic drill collar.
- a near-bit drill-while-drilling measurement system 10 is substantially the same as Embodiment 1, except that it includes a motor system 20, a measurement transmission system 6, a wireless receiving system 5, and a non-magnetic shorting 7.
- the non-magnetic shorting 7 is a non-magnetic drill collar
- the motor system 20 is a screw drilling system, as shown in FIG. 1 , comprising a transmission shaft assembly 1 , a cardan shaft assembly 2 , a motor assembly 3 and Anti-drop assembly 4 composition.
- the inner part of the inner rotating part is designed as a through hole, which not only transmits the power of breaking the rock to the bit but also It also serves as a carrier for the measurement transmission system 6.
- the non-magnetic drill collar is threaded onto the upper end of the outer casing of the motor system 20.
- the transmission shaft assembly 1 of the screw drilling tool system (motor system 20) in the near-bit drilling while drilling measuring system 10 includes a transmission shaft.
- the drive shaft housing 13 is coupled to the cardan shaft housing 24 by upper end threads and is part of the outer housing of the motor system 20, the primary function of which is to transmit the weight-on-bit and protect the internal equipment.
- the bearing set 12 is disposed between the drive shaft 11 and the drive shaft housing 13 and functions mainly to transmit radial and axial loads received by the drive shaft assembly 1 and to ensure torque transmission of the drive shaft 11.
- the support ring 14 is disposed in the inner hole of the transmission shaft 11 near the lower end surface of the transmission shaft 11, and functions to stabilize the measuring device 61 (well inclination, azimuth gamma measurement short circuit), and prevent the measuring device 61 (well inclination, orientation gamma) The measurement is short-circuited or shaken with the drive shaft 11.
- the universal shaft assembly 2 of the screw drilling tool system (motor system 20) in the near-bit drilling while drilling measuring system 10 includes a guide.
- the side wall of the flow guiding joint 21 has a mud passage penetrating through the inner hole thereof for introducing the mud into the inner hole of the propeller shaft 11.
- the upper end and the lower end of the flexible shaft 22 are respectively inserted into the lower end of the rotor joint 23 and the upper end of the flow guiding joint 21 and riveted.
- the flow guiding joint 21, the flexible shaft 22 and the rotor joint 23 have through holes penetrating each other for use as a passage for measuring the transmission system 6.
- the cardan shaft housing 24 is coupled to the drive shaft housing 13 via a lower end of the thread, and the upper end is threadedly coupled to the screw motor stator 31 as part of the outer housing of the motor system 20.
- the main function of the cardan shaft assembly 2 is to convert the eccentric motion of the screw motor rotor 32 into a coaxial rotation, which transmits torque and rotational speed downward. Channels and protection are provided for the transmission device 62 of the measurement transmission system 6.
- the motor assembly 3 of the screw drilling tool system (motor system 20) in the near-bit drilling while drilling measuring system 10 includes a screw motor stator. 31 and a screw motor rotor 32, the lower end of the screw motor stator 31 is screwed to the upper end of the cardan shaft housing 24, and the upper end is threadedly connected to the anti-drop joint 41 of the anti-drop assembly 4, so that the screw motor stator 31 becomes a motor.
- the inner wall of the stator 31 is a rubber bushing having a spatial geometrical parameter such that the screw motor stator 31 and the screw motor rotor 32 located therein constitute the motor assembly 3.
- the screw motor rotor 32 has a spiral curved surface with a certain spatial geometric parameter, and forms a conjugate pair with the rubber bushing of the inner wall of the screw motor stator 31. Under the driving of the drilling fluid, the screw motor rotor 32 performs planetary motion in the screw motor stator 31 to Output speed and torque.
- the screw motor rotor 32 is coupled to the rotor joint 23 of the cardan shaft assembly 2 via the lower end of the thread so that the screw motor rotor 32 can transmit the output speed and torque to the flex shaft 22 via the rotor joint 23.
- the outer diameter of the upper end of the screw motor rotor 32 is screwed to the anti-drop cap 42 of the anti-drop assembly 4, and the inner diameter of the upper end is connected to the transmitting device 64 of the measurement transmission system 6.
- the screw motor rotor 32 has a hollow structure for internally placing the transmission device 62 of the measurement transmission system 6 and the power supply unit 63.
- the anti-drop assembly 4 of the screw drilling tool system (motor system 20) in the near-bit drilling while drilling measuring system 10 includes anti-drop prevention. Short the 41 and the anti-drop cap 42.
- the lower end of the anti-skid stub 41 is connected to the screw motor stator 31 by a screw thread, and the upper end is connected to the non-magnetic drill collar 7 by a screw thread to constitute an outer casing portion of the motor system 20.
- the inner portion of the anti-shock stub 41 has a launching device 64 for measuring the transport system 6, so that its material and function are the same as those of the non-magnetic drill collar 7.
- the center of the anti-drop cap 42 has an axially penetrating through hole, and the lower end is connected to the screw motor rotor 32 by a screw thread to constitute an inner rotating portion of the motor system 20.
- the outer wall of the upper end of the anti-drop cap 42 is provided with a flange, and the inner wall of the lower end of the anti-shock 41 is provided with a limiting shoulder.
- the outer diameter of the flange of the anti-dropping cap 42 is larger than the inner diameter of the limiting shoulder of the short-circuiting 41.
- Embodiment 1-6 is basically the same as Embodiment 1-6, except that the measurement transmission system 6 in the near-bit drilling while drilling measurement system 10 shown in FIG. 1 is composed of a measuring device 61, a transmission device 62, a power supply device 63, and a transmitting device. 64 composition.
- the measuring device 61 is a well inclined/azimuth gamma measuring short section disposed in the driving shaft 11 of the screw drilling tool system (motor system 20), and the distance from the lower end surface of the screw drilling tool system is within 1 meter.
- the measuring device 61 (well inclination/azimuth gamma measurement short circuit) includes an azimuth gamma sensor, an azimuth gamma circuit module, a well inclination sensor, a well deviation circuit module, a probe tube, wherein the probe tube is disposed in a support ring in the transmission shaft 11 14 and relatively fixed.
- the lower portion of the probe tube is a solid hole, and the upper end is screwed to the transmission device 62 to protect the internal sensor and the circuit module and serve as a power interface for the measuring device 61 (well slant/azimu gamma measurement short circuit).
- the azimuth gamma sensor, the azimuth gamma circuit module, the well inclination sensor and the well deviation circuit module are sequentially disposed in the probe tube, and the azimuth gamma sensor is a sensor for measuring the natural gamma of the formation, and the collected data is transmitted to the azimuth gamma circuit module.
- azimuth gamma circuit module consists of various electronic components and circuit boards, the main processing
- the formation azimuth gamma data collected by the gamma sensor; the well inclination sensor and the well deviation circuit module are used for measuring and calculating the inclination data, wherein the inclination data measured by the inclination sensor includes a well angle and a well inclination azimuth.
- the transmitting device 64 of the measuring transmission system 6 is disposed at the upper portion of the screw motor rotor 32 of the screw drilling tool system, and passes through the through hole in the middle of the anti-dropping cap 42 through the inner cavity of the anti-drop shorting 41 that protrudes into the anti-drop assembly 4.
- the lower end is connected to the power supply device 63 by a thread, and is used for wirelessly transmitting the well inclination data and the azimuth gamma data measured by the near bit to the receiving device 51 of the wireless receiving system 5;
- the lower end of the transmission device 62 of the measurement transmission system 6 is screwed to the probe tube, the upper end is screwed to the power supply unit 63, and provides a passage for the transmission of measurement data information and the transmission of the measurement transmission system 6 power; the measurement transmission system 6 is located at the transmission shaft
- the through holes of the assembly 1, the cardan shaft assembly 2 and the inner rotating portion of the motor assembly 3 are fixed relative to the rotating portion of the motor system 20, and are rotatable relative to the outer casing of the motor system 20 with the rotating portion;
- the lower end of the power supply device 63 of the measurement transmission system 6 is screwed to the transmission device 62, and the upper end is screwed to the transmitting device 64, relatively closer to the transmitting device 64, to supply electrical energy to the measuring device 61 and the transmitting device 64;
- This embodiment is basically the same as the embodiment 1-7, and the difference is that the non-magnetic shorting 7 (non-magnetic drill collar) in the near-bit drill-while-drilling measurement system 10 is set in the anti-drop assembly 4 and The upper part is connected between the drill strings, and the lower part is screwed with the anti-drop short 41 of the anti-drop assembly 4, and the upper part is screwed with the drill string.
- Both the transmitting device 64 of the measuring transmission system 6 and the receiving device 51 of the wireless receiving system 5 are disposed in the non-magnetic drill collar 7, but the anti-drop shorting 41 of the anti-drop assembly 4 may be free of non-magnetic material.
- This embodiment is basically the same as Embodiments 1-7, except that the non-magnetic shorting 7 (non-magnetic drill collar) in the near-bit drilling while measuring system 10 is disposed between the motor system 20 and the upper connecting drill string ( There is no anti-drop assembly 4), the lower part is screwed to the screw motor stator 31 of the motor assembly 3, and the upper part is screwed to the drill string.
- the transmitting device 64 of the measuring transmission system 6 and the receiving device 51 of the wireless receiving system 5 are both disposed in the non-magnetic drill collar 7.
- This embodiment is basically the same as the embodiment 1-9, and the difference is that the wireless receiving device 51 of the wireless receiving system 5 in the near-bit drilling while drilling measuring system 10 is disposed in the upper part of the anti-drop assembly 4 as shown in FIG.
- the connected non-magnetic drill collar 7 is fixed relative to the non-magnetic drill collar 7, and when the motor system 20 is in operation, the measurement transmission system 6 is rotated relative to the wireless receiving device 51, and the wireless receiving device 51 of the wireless receiving system 5 and the measurement transmission system 6 are transmitted.
- Device 61 is wirelessly transmitted Transmission signal.
- the wireless receiving device 51 transmits the received measurement data information to the ground.
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Abstract
Description
Claims (10)
- 一种近钻头随钻测量系统,包括马达系统、测量传输系统、无线接收系统、无磁短接,所述马达系统由外部壳体和内部转动部分组成,所述无磁短接设置在所述马达系统上方,且无磁短接与马达系统之间直接连接或连接钻具或短接,其特征在于:所述马达系统的内部转动部分的内部设置有孔,所述测量传输系统包括采集、测量数据的测量装置,将测量装置的数据发射给无线接收系统的发射装置,将测量装置的数据传输给发射装置的传输装置,以及为测量装置和发射装置提供电能的电源装置,测量传输系统的测量装置和传输装置设置在所述马达系统的内部转动部分的孔内,其中测量装置设置在所述马达系统的下1/3位置以内,且距马达系统的下端面的距离在2米以内;测量传输系统的发射装置设置在马达系统的内部转动部分的上部并伸入无磁内腔中,测量传输系统相对所述马达系统转动部分固定,能随转动部分一起相对马达系统的外部壳体转动;无线接收系统的无线接收装置设置在无磁短接内且相对无磁短接固定,马达系统工作时,测量传输系统相对无线接收系统转动,无线接收装置与发射装置通过无线传输的方式传输信号。
- 如权利要求1所述的近钻头随钻测量系统,其特征在于:所述测量装置设置在距马达系统的下端面1.5米的距离以内。
- 如权利要求2所述的近钻头随钻测量系统,其特征在于:所述测量装置设置在距马达系统的下端面1米的距离以内。
- 如权利要求1、2或3所述的近钻头随钻测量系统,其特征在于:所述马达系统为螺杆钻具系统。
- 如权利要求4所述的近钻头随钻测量系统,其特征在于:螺杆钻具系统的转动部分至少包括传动轴,挠轴和螺杆马达转子,所述测量装置设置于所述螺杆钻具系统的传动轴内部,相对传动轴固定,能随传动轴一起转动。
- 如权利要求5所述的近钻头随钻测量系统,其特征在于:所述发射装置设置于所述螺杆马达转子的上部,相对螺杆马达转子固定,能随螺杆马达转子一起转动。
- 如权利要求1所述的近钻头随钻测量系统,其特征在于:所述测量传输系统的电源装置设置在所述马达系统的内部转动部分的孔内,并位于测量装置与发射装置之间,相对更靠近发射装置。
- 如权利要求1所述的近钻头随钻测量系统,其特征在于:所述测量装置包括方位伽马传感器和井斜传感器,所述方位伽马传感器采集方位伽马数据,所述井斜传感器测量井斜数据。
- 如权利要求1所述的近钻头随钻测量系统,其特征在于:所述马达系统与无磁短接之间设有防掉总成,所述防掉总成包括防掉短接和防掉帽,所述防掉帽中心具有轴向贯通的通孔,设置在马达系统的内部转动部分的上部并固定,所述测量传输系统的发射装置从防掉帽中间 的通孔穿过并伸入无磁的防掉短接内腔中,所述防掉短接下部与所述马达系统的外部壳体连接,上部与无磁短接相连,且下端内壁上设有限位台肩;所述防掉帽的上端外壁设有凸缘,所述凸缘用于在下部壳体断裂时抵接于所述限位台肩处。
- 如权利要求1所述的近钻头随钻测量系统,其特征在于:无磁短接为无磁钻铤,且当无磁短接与马达系统之间直接连接时,测量传输系统的发射装置伸入无磁钻铤内腔中。
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