CN2123599U - Short-curvature radius horizontal well screw arbor drilling tool - Google Patents
Short-curvature radius horizontal well screw arbor drilling tool Download PDFInfo
- Publication number
- CN2123599U CN2123599U CN 92206525 CN92206525U CN2123599U CN 2123599 U CN2123599 U CN 2123599U CN 92206525 CN92206525 CN 92206525 CN 92206525 U CN92206525 U CN 92206525U CN 2123599 U CN2123599 U CN 2123599U
- Authority
- CN
- China
- Prior art keywords
- fittings body
- articulated joint
- short
- hydraulic motor
- drilling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The utility model is applicable to drilling short-curvature radius horizontal well. The adoption of 2-3 short screw arbor drilling tools under the well can create large enough torsional moment to cause the drill head to realize effective drilling. A hinged joint between the screw arbor drilling tools can cause the screw arbor drilling tools to successfully pass through a crooked well hole drilled by the drill head with a curvature of 3 DEG-5 DEG / meter, and can effectively convey the drilling pressure and the torsional moment. At the same time, the cooperation with a stabilizer causes the complete set of drilling tool to have the functions of building angle and maintaining angle. A flexible drilling stem adopts a combined type two-way or universal hinged joint. An inclination testing joint connected with the screw drilling tool is cooperated with a testing device, can accurately test the well inclination and the orientation, and ensures the accuracy of the well hole track.
Description
The utility model relates to a kind of down-hole helicoid hydraulic motor that is used for the drilling short radius curvature horizontal well.
Horizontal well is usually with by radius of curvature and the build angle rate of vertical boreholes to the bending section of horizontal hole, be divided into long, in, short turning radius horizontal well.The typical radius of curvature of short turning radius horizontal well is a 6-12 rice, be that build angle rate is 1.5-3 °/0.3 meter, drilling tool is finished in the bending section of 16-18 rice by vertical drilling process to level, and creeps into needed length in the horizontal direction with the rock stratum of achieving the goal according to a certain hole deviation and an orientation.This just requires the design of drilling tool and drilling technology should satisfy above-mentioned requirements.
What at present, the Short Radius Horizontal Wells drilling equipment adopted mostly is the short radius rotary system.It is mainly to creep into guider around rotoflector not and hinged tubing string designs.Tubing string is hinged, to bear the alternating stresses that rotation is produced.This system provides power from ground by power swivel or rotating disk.With recyclable whipstock and packer combination carrying out deflecting.This system is not directed guiding.Behind the beginning deflecting, can not change the well orientation.The kick off orientation can only be controlled in-20 ° the direction.This can not be applicable to a lot of actual conditions certainly.Secondly, the horizontal well horizontal section length that this system obtained generally is no more than 120 meters, and major part is about 60 meters.Because dynamical system on the ground, the down-hole is during by the very little change bent portions of hole curvature radius, and the load that hinged tubing string bore is very large, even has surpassed safe service load allowable, and this point makes horizontal section length be restricted again.The drilling efficiency that uses this kind drilling tool is very low; Total drilling speed average is 20% of a vertical drilling speed.Also drilling efficiency is even lower because of making a trip.Except the above-mentioned this short radius rotation drilling tool that gives power by ground power swivel or rotating disk, also a large amount of at present adopt well dynamic motors (helicoid hydraulic motor or turbodrill) to be positioned at the above rotation drilling tool of kickoff point (KOP) both at home and abroad.Because this drilling tool is to need hinged tubing string to rotate in bending section equally, so it exists and the power similar problem of rotation drilling tool on the ground.
Problem at drilling tool existence discussed above, the purpose of this utility model is to provide a kind of short turning radius horizontal well helicoid hydraulic motor, have make that drill string does not rotate, well dynamic be positioned at kickoff point (KOP) following and also bore lean on load little, have that deflecting performance, higher orientation precision, drilling efficiency height, level are crept into distance, used reliable characteristics preferably.Thereby overcome the defective that prior art exists.
Task of the present utility model is achieved in that by driving shaft that is connected with drill bit and bearing assembly assembly 1, near-bit centralizer 2, helicoid hydraulic motor stator articulated joint 3, rotor articulated joint 4, power transmission shaft and stator connect pipe nipple 5, first order down-hole helicoid hydraulic motor 6, by-pass valve assembly 7, deviational survey joint 8, the two-way articulated system 9 of flex-stem, short drill pipe 10, flex-stem universal hinging joint 11, short drill pipe etc. are formed short turning radius horizontal well drilling well helicoid hydraulic motor, and its characteristics are: 1. it can fully satisfy deflecting in the short turning radius horizontal well drilling process, the requirement of hold angle and drop angle; 2. horizontal segment drilling well distance; Power drilling tool is near the drill bit place, and whole drill string does not rotate in well; 3. the load that acts on the drill string is little; 4. helicoid hydraulic motor stator and rotor articulated joint, the requirement of deflecting, hold angle and the drop angle of short turning radius horizontal well can be fully satisfied in the flex-stem articulated joint, and can make whole drilling tool waltz through the crooked hole section of deep camber (3-5 °/meter); 5. the moment of torsion that helicoid hydraulic motor produces can be stablized, reliably and effectively be transmitted to the articulated joint of helicoid hydraulic motor rotor; 6. articulated joint of helicoid hydraulic motor stator and flex-stem articulated joint can fully be satisfied the requirement of transmitting the pressure of the drill and bearing reaction torque, tension, compressive strength height, good seal performance and long service life.
Fig. 1. be helicoid hydraulic motor structural representation of the present utility model
Fig. 2. helicoid hydraulic motor stator articulated joint structural representation
Fig. 3. helicoid hydraulic motor rotor articulated joint structural representation
Fig. 4. the two-way articulated joint structural representation of flex-stem
Fig. 5. flex-stem universal hinging joint design schematic diagram
Describe the utility model in detail below in conjunction with accompanying drawing:such as accompanying drawing 1; described in the utility model a kind of for short-curvature radius horizontal well screw arbor drilling tool, a whole set of drilling tool adopts following manner to connect and compose: the driving shaft that is connected with drill bit and bearing assembly assembly 1 connect near-bit centralizer 2 connecting screw rod drilling tool stator articulated joints 3 and rotor articulated joint 4 connection for transmission axles and stator and connect 5346347891011……。
Such as accompanying drawing 2, fittings body 21 1 ends of screw drilling tool stator articulated joint 3 of the present utility model and screw drilling tool stator or driving shaft and bearing assembly assembly shell link to each other. Fittings body 29 1 ends link to each other with upper level screw drilling tool stator transition pipe nipple or by-passing valve assembly shell, and 4-6 blade arranged on it. Fittings body 21 is connected by two bearing pins 7 by spherical articulated manner with fittings body 29. Have 1-2 seal groove on the interior sphere of fittings body 29, be placed with " O " RunddichtringO 28 in the groove, symmetrically arranged two bearing pins make fittings body 21 and fittings body 29 that relative swing take bearing pin as the axle center be arranged in same plane, can be by 0-15 °, the size of its amplitude of fluctuation is come 22 restrictions by stop; Stop 22 links to each other with fittings body 29 by screw thread, and has the interior sphere corresponding with the spherical outside surface of fittings body 21. Have seal groove on the sphere in this, be placed with " O " RunddichtringO 24 in the groove, bearing pin 27 is lived by the back of the body female 25 and packing ring 26 block.
As accompanying drawing 3, helicoid hydraulic motor rotor of the present utility model articulated joint 4, its fittings body 31 1 ends are connected with the helicoid hydraulic motor rotor.Its fittings body 35 1 ends can link to each other with screw drill transmission shaft by spline.Fittings body 31 is connected by a hinged ball 32 and 4 bearing pins 34 with fittings body 35.Ring washer 33 can prevent coming off of bearing pin.Two fittings bodies are respectively the axle center with the bearing pin, swing 0-15 ° with respect to axis in two orthogonal planes.Fittings body 31 and hinged ball 32 are the round lobe shape with the axis symmetry of being shaped as of hinged place.
As accompanying drawing 4, two-way articulated joint 9 of the present utility model, two ends link to each other with short drill pipe respectively.Fittings body 41 is identical with the form of structure of fittings body 47.The hinge portion of fittings body 41 and fittings body 47 is two round lobe shapes with the axial line symmetry.Hinged ball 43 is positioned at the centre of fittings body.The spherical outside surface of spheroid is corresponding with the Internal Spherical Surface of fittings body 41,47, and being connected by hinged ball 43 and 4 bearing pins 46 of fittings body 41 and fittings body 47 realizes, in order to prevent getting loose of bearing pin, blocked by the back of the body female 44 and packing ring 45.Be provided with a blade at each circle lobe shape outer wall, its center line parallel is in the axial line of fittings body.After two fittings bodies are hinged, can bearing pin 44 be that the center is swung 0 °-15 ° in orthogonal plane.Respectively have 1-2 seal groove on the two fittings body Internal Spherical Surface, " O " RunddichtringO 42 places in the groove.Fittings body 41,47 and hinged ball 43 inside have the flow channel that satisfies mud displacement that drilling well requires.As accompanying drawing 5, universal hinging joint 11 of the present utility model, two ends link to each other with short drill pipe respectively.Fittings body 51 is connected by articulated joint 52, intermediate 54 and screw 55 with fittings body 57.Articulated joint 52 is connected with fittings body 51.Intermediate 54 and fittings body 57 are ball-joints with articulated joint 52.Fittings body 57 and intermediate 54 are by being threaded.The Internal Spherical Surface of intermediate 54 and fittings body 57 is corresponding with the spherical outside surface of articulated joint 52 sphericals, and fittings body 51 and intermediate 54 have interlaced tooth embedding, and the tooth embedding number on two bodies is respectively 3-6.Have seal groove on the Internal Spherical Surface of the Internal Spherical Surface of intermediate 54 and fittings body 57, " O " RunddichtringO 53 places in the groove, and screw 55 and packing ring 56 play the effect that prevents that intermediate 54 and fittings body 57 from getting loose.Fittings body 51, articulated joint 52 and fittings body 57 have the flow channel that satisfies mud displacement that drilling well requires along axis.
Embodiment: when using the utility model drilling short radius curvature horizontal well, the ground slush pump carries the mud of certain pressure to drive the down-hole helicoid hydraulic motor, makes it produce certain moment of torsion and passes to drill bit.At horizontal well deflecting section start, force drill bit to pierce the stratum by deflecting finder to desired direction with 7-9 ° of angle of slope, realize sidetracking.After piercing this stratum, drill bit, near-bit centralizer and the articulated joint of first segment positive displacement drill bearing group are made up as 3 deflectings, on the plane of directional bearing, realize creeping into of arc track, get out curvature and be 3-5 °/meter well.Guarantee that by above-mentioned each articulated joint whole drilling tool can waltz through the well of the curvature of boring and transmit the pressure of the drill and moment of torsion.When being up to the standard when position layer, the utility model can keep certain hole deviation and orientation to carry out level creeping into and achieve the goal.Creep into finish after, can successfully from well, be proposed.Be connected by two bearing pins 7 by the globular hinge mode with fittings body 29 according to fittings body 21, two bearing pins have the effect of bearing moment of torsion and transmitting the pressure of the drill simultaneously.Have 1-2 seal groove on the Internal Spherical Surface of fittings body 29, be placed with " O " RunddichtringO 28 in the groove, the mud of high pressure leaks to annular space to prevent to have very by articulated joint in drilling process.Symmetrically arranged two bearing pins have with the bearing pin fittings body 21 and fittings body 29 in same plane be the relative swing in axle center.The desired deflecting curvature of short turning radius horizontal well can be fully satisfied in helicoid hydraulic motor stator articulated joint with this structure and connected mode, transmits the pressure of the drill and bear moment of torsion effectively, fully satisfies deflecting, hold angle, drop angle and turns round the requirement in orientation.This helicoid hydraulic motor stator articulated joint has the characteristics of excellent sealing.The requirement of short turning radius horizontal well build angle rate can be fully satisfied in the helicoid hydraulic motor rotor articulated joint of said structure.Transfer torque reliably, and have the characteristics of intensity height, reliable operation.When work, mud passes through with certain pressure, and " O " RunddichtringO plays the effect of sealing, guarantees that mud does not leak to annular space.。The effect of transfer torque was played in engagement when fittings body 51 and intermediate 54 mutual teeth were embedded in work, and can make fittings body 51 and fittings body 57 on 360 ° whole direction, produce 0-15 ° swing mutually, thereby satisfy the requirement that makes drill string pass through the short turning radius horizontal well well smoothly.The tension of this joint, compressive strength height can transmit the pressure of the drill, long service life, good seal performance effectively.
In sum, short-curvature radius horizontal well screw arbor drilling tool described in the utility model, have in the past rotating disk horizontal well drilling and conventional screw drilling tool power in the incomparable advantage of the system more than the crooked hole: drill string need not to rotate in well, like this drilling tool intensity is required to reduce, level is crept into distance thus. Also have the high characteristics of directional drilling and drilling efficiency. Have the intensity height, the characteristics that sealing property is good fully satisfy the drilling well requirement of short turning radius horizontal well. The utility model can also be promoted practical in medium radius horizontal well drilling well and other relevant fields. The utility model is specially adapted to the short turning radius horizontal well drilling well. Adopt 2-3 joint down-hole short screw drilling tool can produce enough big moment of torsion, make drill bit realize effectively creeping into. Articulated joint between the helicoid hydraulic motor, the curvature that helicoid hydraulic motor is waltzed through got out by drill bit is 3-5 °/meter crooked hole, and can effectively transmit the pressure of the drill and moment of torsion. Match with stabilizer simultaneously, make a whole set of drilling tool have the function of deflecting, hold angle. What flex-stem adopted is that combined type is two To or universal articulated joint. The deviational survey joint that links to each other with helicoid hydraulic motor matches with testing arrangement, can measure exactly hole deviation and orientation, guarantees the precision of well track.
Claims (5)
1, a kind of short turning radius horizontal well helicoid hydraulic motor, comprise driving shaft and bearing assembly assembly, near-bit centralizer, driving-shaft assembly and deviational survey joint, by-pass valve assembly, stabilizer, formations such as short screw brill is characterized in that: driving shaft that is connected with drill bit and bearing assembly assembly [1] connection near-bit centralizer [2] connecting screw rod drilling tool stator articulated joint [3] and rotor articulated joint [4] connection power transmission shaft and stator connection pipe nipple [5] connecting screw rod drilling tool connect articulated joint [3] and rotor articulated joint [4] connection first order down-hole screw drill [6] connecting screw rod drilling tool stator articulated joint [3] and rotor articulated joint [4] connection power transmission shaft and stator connection pipe nipple connecting screw rod drilling tool stator articulated joint and rotor articulated joint connection down-hole, second level screw drill connecting screw rod drilling tool stator articulated joint connection by-pass valve assembly [7] connection deviational survey joint [8] the connection two-way articulated joint of flex-stem [9] connection short drill pipe [10] connection flex-stem universal hinging joint [11] connection short drill pipe connection rig surely.
2, short turning radius horizontal well helicoid hydraulic motor according to claim 1 is characterized in that: fittings body ［ 21 ］ one ends of helicoid hydraulic motor stator articulated joint ［ 3 ］ and helicoid hydraulic motor stator or driving shaft and bearing assembly assembly shell link to each other; Fittings body ［ 29 ］ one ends link to each other with upper level helicoid hydraulic motor stator transition pipe nipple or by-pass valve assembly shell, and 4-6 blade arranged on it; Fittings body ［ 21 ］ is connected by two bearing pins ［ 7 ］ by the globular hinge mode with fittings body ［ 29 ］.Have 1-2 seal groove on the Internal Spherical Surface of fittings body ［ 29 ］, be placed with " O " RunddichtringO ［ 28 ］ in the groove, it is that the relative swing in axle center can be by 0-15 ° with the bearing pin in same plane that symmetrically arranged two bearing pins make fittings body ［ 21 ］ and fittings body ［ 29 ］, and the size of its amplitude of fluctuation is limited by stop ［ 22 ］; Stop ［ 22 ］ is connected with fittings body ［ 29 ］, and have and the corresponding Internal Spherical Surface of spherical outside surface of fittings body ［ 21 ］, have seal groove on this Internal Spherical Surface, be placed with " O " RunddichtringO ［ 24 ］ in the groove, bearing pin ［ 27 ］ is lived by the back of the body female ［ 25 ］ and packing ring ［ 26 ］ block.
3, short turning radius horizontal well helicoid hydraulic motor according to claim 1, it is characterized in that: helicoid hydraulic motor rotor articulated joint ［ 4 ］, its fittings body ［ 31 ］ one ends are connected with the helicoid hydraulic motor rotor, and its fittings body ［ 35 ］ one ends link to each other with screw drill transmission shaft; Fittings body ［ 31 ］ is connected by a hinged ball ［ 32 ］ and 4 bearing pins ［ 34 ］ with fittings body ［ 35 ］; Ring washer ［ 33 ］ can prevent coming off of bearing pin; Two fittings bodies are respectively the axle center with the bearing pin, swing 0-15 ° with respect to axis in two orthogonal planes; Fittings body ［ 31 ］ and hinged ball ［ 32 ］ hinged place be shaped as round lobe shape with the axis symmetry.
4, short turning radius horizontal well helicoid hydraulic motor according to claim 1 is characterized in that: the two-way articulated joint of flex-stem ［ 9 ］, and its two ends link to each other with short drill pipe respectively, and fittings body ［ 41 ］ is identical with the form of structure of fittings body ［ 47 ］; The hinge portion of fittings body ［ 41 ］ and fittings body ［ 47 ］ is two round lobe shapes with the axial line symmetry; Hinged ball ［ 43 ］ is positioned at the centre of fittings body; The spherical outside surface of spheroid is corresponding with the Internal Spherical Surface of fittings body ［ 41 ］, ［ 47 ］, and being connected by hinged ball ［ 43 ］ and 4 bearing pins ［ 46 ］ of fittings body ［ 41 ］ and fittings body ［ 47 ］ realizes that bearing pin is lived by the back of the body female ［ 44 ］ and packing ring 45 block.Be provided with a blade at each circle lobe shape outer wall pin-and-hole place, the hinged back of two fittings bodies is that the axle center is swung 0-15 ° in orthogonal plane with bearing pin ［ 44 ］; Respectively have 1-2 seal groove on the two fittings body Internal Spherical Surface, " O " RunddichtringO ［ 42 ］ places in the groove; Fittings body ［ 41 ］, ［ 47 ］ and hinged ball ［ 43 ］ inside have the flow channel that satisfies mud displacement that drilling well requires.
5, Short Radius Horizontal Wells helicoid hydraulic motor according to claim 1 is characterized in that: flex-stem universal hinging joint ［ 11 ］, and two ends link to each other with short drill pipe respectively; Fittings body ［ 51 ］ is connected by articulated joint ［ 52 ］, intermediate ［ 54 ］ and screw ［ 55 ］ with fittings body ［ 57 ］; Articulated joint ［ 52 ］ and fittings body ［ 51 ］ are by being threaded; Intermediate ［ 54 ］ and fittings body ［ 57 ］ are ball-joints with articulated joint ［ 52 ］; Fittings body ［ 57 ］ and intermediate ［ 54 ］ are by being threaded; The Internal Spherical Surface of intermediate ［ 54 ］ and fittings body ［ 57 ］ is corresponding with the spherical outside surface of articulated joint ［ 52 ］ spherical, and fittings body ［ 51 ］ and intermediate ［ 54 ］ have interlaced tooth embedding, and the tooth embedding number on two bodies is respectively 3-6; Have seal groove on the Internal Spherical Surface of the Internal Spherical Surface of intermediate ［ 54 ］ and fittings body ［ 57 ］, " O " RunddichtringO ［ 53 ］ places in the groove; Screw ［ 55 ］ and packing ring ［ 56 ］ can prevent that intermediate ［ 54 ］ and fittings body ［ 57 ］ from getting loose; Fittings body ［ 51 ］, articulated joint ［ 52 ］ and fittings body ［ 57 ］ have the flow channel that satisfies mud displacement that drilling well requires along axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92206525 CN2123599U (en) | 1992-04-13 | 1992-04-13 | Short-curvature radius horizontal well screw arbor drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92206525 CN2123599U (en) | 1992-04-13 | 1992-04-13 | Short-curvature radius horizontal well screw arbor drilling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2123599U true CN2123599U (en) | 1992-12-02 |
Family
ID=4952455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92206525 Granted CN2123599U (en) | 1992-04-13 | 1992-04-13 | Short-curvature radius horizontal well screw arbor drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2123599U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832105A (en) * | 2010-04-28 | 2010-09-15 | 李孝勇 | Method for well drilling and cementing of radial horizontal well with ultra-short radius and equipment thereof |
| CN104775758A (en) * | 2015-05-05 | 2015-07-15 | 德州联合石油机械有限公司 | Angle holding screw drilling tool for extended-reach directional well |
| CN106869775A (en) * | 2017-03-08 | 2017-06-20 | 李文新 | A kind of arc pile auger of municipal pile foundation engineering |
| CN107013164A (en) * | 2017-06-01 | 2017-08-04 | 奥瑞拓能源科技股份有限公司 | Underground double motor equipment |
| CN109854174A (en) * | 2019-04-02 | 2019-06-07 | 大庆井泰石油工程技术股份有限公司 | Short radius drilling tool and drilling method |
| CN114352201A (en) * | 2022-03-18 | 2022-04-15 | 合力（天津）能源科技股份有限公司 | Movable bent angle mechanism of ultra-short radius screw drill |
| CN114673444A (en) * | 2022-03-31 | 2022-06-28 | 中国石油大学(北京) | Flexible screw drilling tool and drilling method |
| CN115030654A (en) * | 2022-06-15 | 2022-09-09 | 大庆市佰昂石油科技有限公司 | Adjustable flexible screw drill |
-
1992
- 1992-04-13 CN CN 92206525 patent/CN2123599U/en active Granted
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832105A (en) * | 2010-04-28 | 2010-09-15 | 李孝勇 | Method for well drilling and cementing of radial horizontal well with ultra-short radius and equipment thereof |
| CN104775758A (en) * | 2015-05-05 | 2015-07-15 | 德州联合石油机械有限公司 | Angle holding screw drilling tool for extended-reach directional well |
| CN104775758B (en) * | 2015-05-05 | 2017-08-04 | 德州联合石油机械有限公司 | A kind of hold angle helicoid hydraulic motor for extended reach directional well |
| CN106869775A (en) * | 2017-03-08 | 2017-06-20 | 李文新 | A kind of arc pile auger of municipal pile foundation engineering |
| CN107013164A (en) * | 2017-06-01 | 2017-08-04 | 奥瑞拓能源科技股份有限公司 | Underground double motor equipment |
| CN109854174A (en) * | 2019-04-02 | 2019-06-07 | 大庆井泰石油工程技术股份有限公司 | Short radius drilling tool and drilling method |
| CN109854174B (en) * | 2019-04-02 | 2024-03-26 | 大庆井泰石油工程技术股份有限公司 | Short radius drilling tool and drilling method |
| CN114352201A (en) * | 2022-03-18 | 2022-04-15 | 合力（天津）能源科技股份有限公司 | Movable bent angle mechanism of ultra-short radius screw drill |
| CN114673444A (en) * | 2022-03-31 | 2022-06-28 | 中国石油大学(北京) | Flexible screw drilling tool and drilling method |
| CN114673444B (en) * | 2022-03-31 | 2024-02-13 | 中国石油大学(北京) | Flexible screw drilling tool and drilling method |
| CN115030654A (en) * | 2022-06-15 | 2022-09-09 | 大庆市佰昂石油科技有限公司 | Adjustable flexible screw drill |
| CN115030654B (en) * | 2022-06-15 | 2024-01-12 | 大庆市佰昂石油科技有限公司 | Adjustable flexible screw drilling tool |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU635509B2 (en) | Directional drilling apparatus and method | |
| AU690334B2 (en) | Directional drilling | |
| CA1157005A (en) | Tool for drilling curved sections of well holes | |
| US5617926A (en) | Steerable drilling tool and system | |
| US5542482A (en) | Articulated directional drilling motor assembly | |
| CN112832681A (en) | Controllable-track lateral drilling tool and method | |
| CN105143589A (en) | Adjustable bend assembly for a downhole motor | |
| CN102913131A (en) | Dynamic point-the-bit rotary steering drilling tool | |
| CN114439371B (en) | Controlled ultra-short radius guiding drilling system and drilling method | |
| CN2123599U (en) | Short-curvature radius horizontal well screw arbor drilling tool | |
| CN111827884A (en) | Short-radius side-drilling universal drill rod | |
| CN108678668A (en) | A kind of barefoot laterally drilling horizontal well deflecting tool | |
| CN2278757Y (en) | Flexible pipe drilling tool for super-short radium horizontal drilling | |
| CN110485924A (en) | Coiled tubing drilling power drill head controlling device and its application method | |
| CN1854455A (en) | Guide rail spline oriented drilling tool | |
| CN2825915Y (en) | Oriented well drilling tool with guide rail and spline | |
| RU2600248C1 (en) | Equal angular velocities connecting assembly for drill column | |
| CN109083593A (en) | A kind of waterpower backup drill bit directional type guide drilling tool | |
| CN2391001Y (en) | Whipstock for horizontal well drilling | |
| CN107724960A (en) | A kind of controllable guiding pipe nipple of electrodrill | |
| CN2252878Y (en) | Bit guider | |
| CN210370525U (en) | Directional composite drilling tool for geothermal well construction | |
| WO2023284901A1 (en) | Flexible branch drilling tool | |
| CN217976084U (en) | Mechanical rotary guide capable of reducing friction resistance and supporting pressure | |
| CN2291496Y (en) | Centralising device for drilling tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |