CN108979537A - Enhanced static state pushing type rotary steerable tool - Google Patents
Enhanced static state pushing type rotary steerable tool Download PDFInfo
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- CN108979537A CN108979537A CN201810937467.7A CN201810937467A CN108979537A CN 108979537 A CN108979537 A CN 108979537A CN 201810937467 A CN201810937467 A CN 201810937467A CN 108979537 A CN108979537 A CN 108979537A
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- rotary steerable
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- 230000003068 static effect Effects 0.000 title claims abstract description 41
- 230000007246 mechanism Effects 0.000 claims abstract description 155
- 230000000694 effects Effects 0.000 claims abstract description 14
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000005611 electricity Effects 0.000 claims description 4
- 238000005553 drilling Methods 0.000 abstract description 28
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 4
- 239000003345 natural gas Substances 0.000 abstract description 2
- 239000003208 petroleum Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 210000002105 tongue Anatomy 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 241001074085 Scophthalmus aquosus Species 0.000 description 3
- 208000002925 dental caries Diseases 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/06—Deflecting the direction of boreholes
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- Engineering & Computer Science (AREA)
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- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to petroleum, the drilling tool of natural gas drilling field, are a kind of enhanced static pushing type rotary steerable tools.Technical problem: increase deflecting effect.Technical characteristic: including, mandrel, biasing mechanism A, biasing mechanism B, outer cylinder, pedestal；Biasing mechanism A includes scalable rib, and three sets of biasing mechanism A are uniformly arranged on outer tube rear end periphery；The rear end biasing mechanism B is rotatable to be socketed with outer cylinder front end；Biasing mechanism B includes interior camcylinder, outer camcylinder, retaining mechanism, driving cylinder, driving mechanism；Interior camcylinder is rotatable to be socketed on mandrel；Outer camcylinder is rotatable to be socketed on interior camcylinder；Driving cylinder is fixedly connected with interior camcylinder, and the rotatable socket of outer cylinder front end drives cylinder；Driving mechanism can controlled driving outer cylinder and the relative rotation of interior camcylinder.The utility model has the advantages that increasing the angle of drill bit offset by two groups of front and back biasing mechanism, guiding purpose is realized.
Description
Technical field
The present invention relates to the drilling tools of the drilling fields such as petroleum, natural gas, are a kind of enhanced static pushing type rotations
Steering tool.
Background technique
With ultradeep well, high-leveled and difficult directional well, cluster well, horizontal well, extended reach well, Multilateral Wells and 3 D complex structure well
Development, for rotary steerable tool because effect of hole cleaning is more preferable, wellbore trajectory control precision is higher, and displacement extension ability is stronger,
Gradually instead of traditional slide-and-guide tool.However, a key technology index -- the deflecting of existing rotary steerable tool
Rate -- opposite conventional slip guide drilling tool does not have advantage, so, in some well sections, such as horizontal well inclination section, horizontal well
Ladder section, distinguishingly interval equipotential, which are set, has to continue to use conventional slip guide drilling tool to increase slope.
So inventing new rotary steerable tool, increase deflecting effect, needed for when being.
Summary of the invention
The present invention for the technical issues of be: how to increase deflecting effect and the deficiencies in the prior art.
The technical solution adopted by the present invention is that: use two groups of biasing mechanisms, front and back setting, to increase unilateral build angle rate.
The technical characteristic that the present invention includes has: enhanced static state pushing type rotary steerable tool, including, mandrel biases machine
Structure A, outer cylinder, pedestal.
Pedestal rear end is fixedly connected with drill string, for the enhanced static pushing type rotary steerable tool to be connected to drill string
On；Core back-end is fixedly connected with pedestal, and mandrel front end is fixedly connected with drill bit, and the torque for generating drill string rotating is transmitted to brill
Head realizes the cutting to rock stratum.
Outer cylinder is rotatable to be socketed on mandrel；For wrapping up inside the enhanced static pushing type rotary steerable tool
Component, outer cylinder can be laterally static (not rotating relative to the borehole wall) relative to the borehole wall by rubbing, and provide bearing for mandrel rotation.
The quantity of biasing mechanism A is three sets, is uniformly arranged on outer tube rear end periphery；Biasing mechanism A includes scalable rib；
The borehole wall for the backup direction initialization that the rib of three sets of biasing mechanism A can be set, to cause drill bit to deviate, to increase drill bit
Unilateral cutting realizes the control to drill bit drilling direction, achievees the purpose that guiding.
The enhanced static pushing type rotary steerable tool further includes biasing mechanism B, the rotatable set of biasing mechanism B
It connects on mandrel, the rear end biasing mechanism B is rotatable to be socketed with outer cylinder front end；Specifically, biasing mechanism B includes interior camcylinder,
Outer camcylinder, retaining mechanism drive cylinder, driving mechanism.
Interior camcylinder is rotatable to be socketed on mandrel；Outer camcylinder is rotatable to be socketed on interior camcylinder,
For can produce bias effect；Retaining mechanism is set between interior camcylinder and outer camcylinder, can outer camcylinder with
Interior camcylinder is locked together；Driving cylinder is fixedly connected with interior camcylinder, drives that cylinder is rotatable is socketed in mandrel
On, outer cylinder front end is rotatable to be socketed on driving cylinder；Driving mechanism is set between outer cylinder and driving cylinder, controlled can be driven
Dynamic outer cylinder and interior camcylinder relatively rotate, and the biasing for adjusting biasing mechanism B is directed toward.Pass through interior camcylinder and outer bias
The relative rotation of cylinder, driving biasing mechanism B are protruded to the direction of setting with the backup borehole wall, deviate drill bit, to increase brill
The unilateral cutting of head, realizes the deflecting of any direction.It is bored when the enhanced static pushing type rotary steerable tool is in hold angle
State is crept into state or deflecting, biasing mechanism B is locked by retaining mechanism to maintain the relatively interior camcylinder of outer camcylinder
Position is constant.In addition, biasing mechanism B may deviate the biased direction of setting during directional drilling, by driving outer cylinder with
Biasing mechanism B is relatively rotated, and biasing mechanism B can be maintained to be directed toward the biased direction of setting always.
The quantity of biasing mechanism is two groups, that is, biasing mechanism A, biasing mechanism B, for enhancing bias effect.
In the prior art, rotary steerable tool (such as static pushing type rotary steerable tool) is usually using one group of biasing machine
Structure, the angle that drill bit offsets to one side is too small, causes insufficient in some well section build angle rates, it has to continue to use conventional slip and lead
To drilling tool to increase build angle rate.This programme can increase what drill bit offseted to one side by using two groups of front and back biasing mechanism
Angle, to increase build angle rate.
In the application, the front end refers to close to one end of drill bit；The rear end refers to one end close to drill string, and preceding
End corresponds to.In the application, one word of setting refers to setting in advance, determines.
Further, the biasing mechanism B further includes round buss；The round buss is rotatable to be socketed in outer camcylinder
On；When the biasing for adjusting biasing mechanism B is directed toward, outer camcylinder needs to rotate, when outer camcylinder is directly exposed to the borehole wall,
Frictional resistance is big therebetween, and outer camcylinder is difficult to rotate；Round buss effect is frictional resistance when reducing the rotation of outer camcylinder.
Further, retaining mechanism can be friction-type retaining mechanism；Friction-type retaining mechanism include cavity, thrust mechanism,
Friction block, rubbing surface；Thrust mechanism can move back and forth in the cavity, and friction block is pushed to squeeze or be detached from rubbing surface, for realizing
Locking or unlocked state.
Further, thickest position is arranged in outer camcylinder cylinder in the cavity of retaining mechanism, including rubbing surface setting
Camcylinder barrel corresponding position periphery；Cavity setting is beneficial to increase structural strength in thickest position.
Further, retaining mechanism is also possible to wedged type retaining mechanism, and wedged type retaining mechanism includes cavity, thrust machine
Structure, movable block tongue, card slot；Thrust mechanism can move back and forth in the cavity, and promotion activity block tongue inserts or pull out card slot, for real
Now locking or unlocked state.
Further, thickest position is arranged in outer camcylinder cylinder in the cavity of retaining mechanism, inclined including card slot setting
Heart cylinder barrel corresponding position periphery, pocket numbers are two, and one is arranged in interior camcylinder barrel thickest position, can
Deflecting state drilling is maintained for drill bit；One setting can be used for drill bit maintenance in interior camcylinder barrel minimum wall thickness (MINI W.) position
Hold angle state drilling；Cavity setting is beneficial to increase structural strength in thickest position.
Further, interior camcylinder barrel minimum wall thickness (MINI W.) is equal with outer camcylinder barrel minimum wall thickness (MINI W.)；And interior off-centre operation
Cylinder barrel thickest is equal with outer camcylinder barrel thickest；For enhanced static pushing type rotary steerable tool
Periphery each point is equal to mandrel axial line distance, with angle holding drilling.In addition, camcylinder barrel minimum wall thickness (MINI W.), thickest in only
The sum of it is equal with the sum of outer camcylinder barrel minimum wall thickness (MINI W.), thickest, can also realize that enhanced static pushing type rotation is led
Periphery each point to tool is equal to mandrel axial line distance, but structural strength wants poor.
Further, biasing mechanism A use is driven by electricity；Biasing mechanism B use is driven by electricity.
For example, power supply can be located on the drill string, it is arranged in mandrel, interior camcylinder, outer camcylinder and outer cylinder conductive sliding
Electric current is introduced biasing mechanism A, retaining mechanism, driving mechanism by ring；Electric current can also be introduced into locking machine by wireless induction
Structure, driving mechanism.
Further, biasing mechanism A is driven using mud；Biasing mechanism B is driven using mud.
For example, being provided with controllable opening on mandrel, it is arranged in interior camcylinder, outer camcylinder and outer cylinder corresponding
Pipeline introducing biasing mechanism A, retaining mechanism and driving mechanism that mud is controllable, and in mandrel, interior camcylinder, outer off-centre operation
Sealing device is arranged in cylinder and the outer cylinder place of being correspondingly connected with, for avoiding mud loss.
The present invention also provides a kind of drill assembly, are provided with the enhanced static pushing type rotary steerable tool, described
Enhanced static state pushing type rotary steerable tool rear end connects drill string, and front end connects drill bit.
Because this programme increases the angle of drill bit offset, by the different biasing mechanism in two groups of front and back to realize guiding mesh
, so, it is enhanced static pushing type rotary steerable tool, simple, accurate, image by this programme name definition.
In the present invention, according to the well-known technique of engine art, necessary component, unit is set in necessary place or are
System.Such as power supply is set on drill string, control system is set on drill string, bearing is set at necessity, is arranged at necessity close
Interior camcylinder, outer camcylinder position detecting mechanism is arranged in sealing at necessity.
The beneficial effects of the present invention are as follows: 1) increase the angle of drill bit offset by two groups of front and back biasing mechanism, guiding is realized
Purpose；2) the independent rib backup borehole wall of use, two groups of front and back biasing mechanism, the angle of offset are bigger compared with the prior art；3) it ties
Structure is compact, internal cavities are few, is beneficial to reduce the requirement to material, improves the work of enhanced static pushing type rotary steerable tool
Make the service life.
Detailed description of the invention
The enhanced static pushing type rotary steerable tool structural schematic diagram of Fig. 1.
Fig. 2 whipstock theory schematic diagram.
Fig. 3 biasing mechanism A structure and distribution schematic diagram.
Fig. 4 biasing mechanism B structure schematic diagram.
Fig. 5 driving mechanism structure schematic diagram.
Fig. 6 friction-type locking mechanism structure schematic diagram.
Fig. 7 wedged type locking mechanism structure schematic diagram.
In figure, 1 drill bit, 2 drill strings, 3 mandrels, 4 pedestals, 5 deviation angles, 7 boreholes wall, 10 biasing mechanism A, 12 ribs, 14
Plunger, 16 shafts, 18 reset springs, 20 biasing mechanism B, camcylinder in 22,24 driving cylinders, 26 outer camcylinders, 28
Round buss, 32 driving mechanisms, 34 first parts, 36 second parts, 40 outer cylinders, 50/60 retaining mechanism, 52 cavitys, 54 push away
Force mechanisms, 56 friction blocks, 58 rubbing surfaces, 62 cavitys, 64 thrust mechanisms, 66 movable block tongues, 68 card slots.
Specific embodiment
It should be noted that in the absence of conflict, the technical characteristic in embodiment and embodiment in the present invention can
To be combined with each other.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Below with reference to Fig. 1 to Fig. 7, the preferred embodiment of the present invention is described in further detail.
The enhanced static pushing type rotary steerable tool section of 3 axis of mandrel is crossed when as shown in Figure 1, being deflecting state.
4 rear end of pedestal is fixedly connected with drill string 2, for the enhanced static pushing type rotary steerable tool to be connected to brill
On column 2；3 rear end of mandrel is fixedly connected with pedestal 4, and 3 front end of mandrel is fixedly connected with drill bit 1, the torque for generating the rotation of drill string 2
It is transmitted to drill bit 1, realizes the cutting to rock stratum.
Outer cylinder 40 is rotatable to be socketed on mandrel 3；For wrapping up the enhanced static pushing type rotary steerable tool
Internal component, outer cylinder 40 can be lateral static (not rotating relative to the borehole wall 7) relative to the borehole wall 7 by friction, provide branch for the rotation of mandrel 3
It holds.
The quantity of biasing mechanism is two groups, that is, biasing mechanism A10, biasing mechanism B20, for enhancing bias effect.
Biasing mechanism A10 can be such, comprising: rib 12, plunger 14, shaft 16, reset spring 18；Rib 12
It is rotatably arranged in biasing mechanism A10 by shaft 16, plunger 14 is set on the inside of a movable end of rib 12, plunger
14 are telescopically disposed in 14 cylinder of plunger, rib 12 can be pushed protruding with the backup borehole wall 7, reset spring 18 is arranged in the wing
On the inside of another movable end of rib 12, for resetting rib 12；Plunger 14 is driven by hydraulic oil and servo motor.
Biasing mechanism B20 is rotatable to be socketed on mandrel 3, and the rear end biasing mechanism B20 is rotatable with 40 front end of outer cylinder
Socket；Specifically, biasing mechanism B20 includes interior camcylinder 22, outer camcylinder 26, retaining mechanism 50, driving cylinder 24, drive
Motivation structure 32.
Interior camcylinder 22 is rotatable to be socketed on mandrel 3；Outer camcylinder 26 is rotatable to be socketed in interior off-centre operation
On cylinder 22, for can produce bias effect；Retaining mechanism 50 is set between interior camcylinder 22 and outer camcylinder 26, can be
Outer camcylinder 26 is locked together with interior camcylinder 22；Driving cylinder 24 is fixedly connected with interior camcylinder 22, driving circle
Cylinder 24 is rotatable to be socketed on mandrel 3, and 40 front end of outer cylinder is rotatable to be socketed on driving cylinder 24；Driving mechanism 32 is arranged
Between outer cylinder 40 and driving cylinder 24, can controlled driving outer cylinder 40 relatively rotated with interior camcylinder 22, biased for adjusting
The biasing of mechanism B20 is directed toward.By the relative rotation of interior camcylinder 22 and outer camcylinder 26, driving biasing mechanism B20 to
The direction protrusion of setting deviates drill bit 1, to increase the unilateral cutting of drill bit 1, is realized any direction with the backup borehole wall 7
Deflecting.When the enhanced static pushing type rotary steerable tool is in angle holding drilling state or deflecting drilling state, biasing machine
Structure B20 is locked by retaining mechanism 50 to maintain relatively interior 22 position of camcylinder of outer camcylinder 26 constant.In addition, orienting
In drilling process, biasing mechanism B20 may deviate the biased direction of setting, opposite with biasing mechanism B20 by driving outer cylinder 40
Rotation, can maintain biasing mechanism B20 to be directed toward the biased direction of setting always.
In the prior art, such as static pushing type rotary steerable tool of rotary steerable tool is usually using one group of biasing mechanism
A10, the angle 5 that offsets to one side of drill bit 1 is too small, causes insufficient in some well section build angle rates, it has to continue to use conventional slip
Guide drilling tool is to increase build angle rate.This programme can be increased drill bit 1 and be offseted to one side by using two groups of front and back biasing mechanism
Angle 5, to increase build angle rate.
The biasing mechanism B20 further includes round buss 28；The round buss 28 is rotatable to be socketed in outer camcylinder
On 26；When the biasing for adjusting biasing mechanism B20 is directed toward, outer camcylinder 26 needs to rotate, when outer camcylinder 26 is directly naked
It is exposed to the borehole wall 7, frictional resistance is big therebetween, and outer camcylinder 26 is difficult to rotate；The effect of round buss 28 is to reduce outer camcylinder 26
The frictional resistance of rotation.
As shown in Fig. 2, the top of figure is the static pushing type rotary steerable tool of the prior art in figure, biased in single group
Mechanism A10's pushes down against the borehole wall 7, and 2 front end of drill string is offset up, and produces a lesser deviation angle 5, results in drill bit
1 increases the unilateral cutting to the upside borehole wall 7, achievees the purpose that guiding；The lower part of figure is the enhanced static backup of this programme
Formula rotary steerable tool, the biasing mechanism A10 of rear end push upward against the borehole wall 7, and 2 rear end of drill string is more close to side borehole wall 7, front end
Biasing mechanism B20 push down against the borehole wall 7,2 front end of drill string is then offset up, 2 rear end of drill string in conjunction with caused by biasing mechanism A10
Close to side borehole wall 7, a bigger deviation angle 5 is just produced, results in the unilateral cutting of 1 pair of upside borehole wall 7 of drill bit
Angle increases, and has achieved the effect that generate bigger build angle rate.
As shown in figure 3, for A-A section in Fig. 1；The quantity of biasing mechanism A10 is three sets, is uniformly arranged on 40 rear end of outer cylinder
Periphery；Under the promotion of each plunger 14, the borehole wall 7 of three selectable backup direction initializations of rib 12 causes drill bit 1 to deviate,
To increase the unilateral cutting of drill bit 1, realizes the control to 1 drilling direction of drill bit, achieve the purpose that guiding.
As shown in figure 4, being described to the structure of biasing mechanism B20, interior 22 barrel of camcylinder is minimum for B-B section in Fig. 1
Position is corresponding with outer 26 barrel minimum position of camcylinder, interior 22 barrel maximum position of camcylinder and outer 26 barrel of camcylinder
Maximum position is corresponding, and 28 center deviation mandrel of round buss, 3 center is downwardly projecting；Retaining mechanism 50 is in locking state, for tieing up
It is downwardly projecting to hold biasing mechanism B20.It should be noted that biasing mechanism B20 is in non-bias state in Fig. 1, machine is biased in Fig. 4
Structure B20 is in biased downward state.
Interior 22 barrel minimum wall thickness (MINI W.) of camcylinder is equal with outer 26 barrel minimum wall thickness (MINI W.) of camcylinder；And interior camcylinder
22 barrel thickests are equal with outer 26 barrel thickest of camcylinder；For enhanced static pushing type rotary steerable tool
Periphery each point it is equal to 3 axial line distance of mandrel, with angle holding drilling.In addition, 22 barrel minimum wall thickness (MINI W.) of camcylinder, maximum in only
The sum of wall thickness is equal with the sum of outer 26 barrel minimum wall thickness (MINI W.) of camcylinder, thickest, can also realize enhanced static pushing type
The periphery each point of rotary steerable tool is equal to 3 axial line distance of mandrel, but structural strength wants poor.
As shown in figure 5, for C-C section in Fig. 1；Driving mechanism 32 is set between outer cylinder 40 and driving cylinder 24, can be by
Control driving outer cylinder 40 and driving cylinder 24 relatively rotate.Driving mechanism 32 can be such, including first part 34 and second
Part 36, such as motor stator of first part 34 are fixed in outer cylinder 40, such as rotor fixing sleeve of second part 36
It connects on driving cylinder 24, first part 34 and the cooperation rotation of second part 36 drive outer cylinder 40 and opposite turn of driving cylinder 24
It is dynamic.During directional drilling, biasing mechanism B20 may deviate the biased direction of setting, be justified by driving outer cylinder 40 and driving
Cylinder 24 relatively rotates, and biasing mechanism B20 can be maintained to be directed toward the biased direction of setting always.In directional drilling and two kinds of angle holding drilling
It when state is converted, needs to relatively rotate between outer camcylinder 26 and interior camcylinder 22, be unlocked by retaining mechanism 50, drive
Mechanism 32 drives interior camcylinder 22 to rotate, and outer camcylinder 26 is motionless, it can be achieved that directional drilling and two kinds of shapes of angle holding drilling
State is mutually converted.When directional drilling and angle holding drilling two states are converted, can outer camcylinder 26 and round buss 28 it
Between be arranged a locking device that can be unlocked so that outer camcylinder 26 is motionless.
As shown in fig. 6, retaining mechanism 50 can be friction-type retaining mechanism 50；Friction-type retaining mechanism 50 includes cavity
52, thrust mechanism 54, friction block 56, rubbing surface 58；Thrust mechanism 54 can move back and forth in cavity 52, push being attached thereto
Friction block 56 squeezes or is detached from rubbing surface 58, for realizing locking or unlocked state.
As shown in fig. 7, retaining mechanism 60 is also possible to wedged type retaining mechanism 60, wedged type retaining mechanism 60 includes cavity
62, thrust mechanism 64, movable block tongue 66, card slot 68；Thrust mechanism 64 can move back and forth in cavity 62, push being attached thereto
Movable block tongue 66 inserts or pull out card slot 68, for realizing locking or unlocked state.
Working method of the invention has: 1) directional drilling mode, the 12 backup side borehole wall 7 of rib of biasing mechanism A10, partially
It sets mechanism B20 to protrude to the other side borehole wall 7 of relative direction, drill bit 1 is caused to add to the angle of the unilateral cutting of the side borehole wall 7
Greatly, achieve the effect that generate bigger build angle rate；Wherein, the 22 barrel minimum position of interior camcylinder of biasing mechanism B20 and outer
26 barrel minimum position of camcylinder is corresponding, interior 22 barrel maximum position of camcylinder and outer 26 barrel maximum position of camcylinder
Corresponding, retaining mechanism 50 is locked, and such as Fig. 4, biasing mechanism B20 are in bias state, and outer cylinder 40 is laterally static with respect to the borehole wall 7； 2)
Angle holding drilling mode, the 22 barrel minimum position of interior camcylinder of biasing mechanism B20 and outer 26 barrel maximum position of camcylinder
Corresponding, interior 22 barrel maximum position of camcylinder is corresponding with outer 26 barrel minimum position of camcylinder, and retaining mechanism 50 is locked, partially
It sets the center mechanism B20 to be overlapped with 2 axis of drill string, is in non-bias state；The rib 12 of three sets of biasing mechanism A10 does not stretch out,
In non-bias state；It can angle holding drilling.
The above is only presently preferred embodiments of the present invention, but it is understood that, the invention is not limited to disclosed
Embodiment and component, on the contrary, it is intended to cover including that various within the spirit and scope of appended claims change
Type, feature combination, equivalent device and equivalent component.In addition, there is the size of the feature of each component in the accompanying drawings simultaneously
It is not limiting, wherein the size of each component can be different from the size of component of description in the accompanying drawings.Therefore, the present invention uses
In covering to remodeling of the invention and deformation, as long as they are in the range of appended claims and their equivalent scheme
Within.
Claims (10)
1. a kind of enhanced static pushing type rotary steerable tool, including, mandrel (3), biasing mechanism A(10), outer cylinder (40), base
Seat (4)；
Pedestal (4) rear end is fixedly connected with drill string (2)；Mandrel (3) rear end is fixedly connected pedestal (4), and mandrel (3) front end is fixedly connected
Drill bit (1)；Outer cylinder (40) is rotatable to be socketed on mandrel (3)；Biasing mechanism A(10) quantity be three sets, be uniformly arranged on
Outer cylinder (40) rear end periphery；Biasing mechanism A(10) it include scalable rib (12)；
It is characterized by: the enhanced static pushing type rotary steerable tool further includes biasing mechanism B(20), biasing mechanism B
(20) rotatable to be socketed on mandrel (3), biasing mechanism B(20) rear end is rotatable and outer cylinder (40) front end is socketed；Tool
Body, biasing mechanism B(20) it include interior camcylinder (22), outer camcylinder (26), retaining mechanism (50) drives cylinder (24),
Driving mechanism (32)；
Interior camcylinder (22) is rotatable to be socketed on mandrel (3)；Outer camcylinder (26) is rotatable to be socketed in interior bias
On cylinder (22)；Retaining mechanism (50) is set between interior camcylinder (22) and outer camcylinder (26), can be outer off-centre operation
Cylinder (26) is locked together with interior camcylinder (22)；
Driving cylinder (24) is fixedly connected with interior camcylinder (22), drives that cylinder (24) are rotatable is socketed on mandrel (3),
Outer cylinder (40) front end is rotatable to be socketed in driving cylinder (24)；Driving mechanism (32) is set to outer cylinder (40) and driving cylinder
It (24), can controlled driving outer cylinder (40) and interior camcylinder (22) relative rotation between.
2. enhanced static pushing type rotary steerable tool according to claim 1, it is characterised in that: biasing mechanism B
It (20) further include round buss (28)；The round buss (28) is rotatable to be socketed on outer camcylinder (26).
3. enhanced static pushing type rotary steerable tool according to claim 1 or 2, it is characterised in that: retaining mechanism
It (50) is friction-type retaining mechanism (50)；Friction-type retaining mechanism (50) includes cavity (52), thrust mechanism (54), friction block
(56), rubbing surface (58)；Thrust mechanism (54) can move back and forth in cavity (52), push friction block (56) to squeeze or be detached from and rub
Wiping face (58).
4. enhanced static pushing type rotary steerable tool according to claim 3, it is characterised in that: retaining mechanism (50)
Cavity (52) be arranged in outer camcylinder (26) cylinder thickest position, rubbing surface (58) be arranged in interior camcylinder (22)
Barrel corresponding position periphery.
5. enhanced static pushing type rotary steerable tool according to claim 1 or 2, it is characterised in that: retaining mechanism
It (60) is wedged type retaining mechanism (60), wedged type retaining mechanism (60) includes cavity (62), thrust mechanism (64), movable block tongue
(66), card slot (68)；Thrust mechanism (64) can move back and forth in cavity (62), and promotion activity block tongue (66) inserts or pull out card
Slot (68).
6. enhanced static pushing type rotary steerable tool according to claim 5, it is characterised in that: retaining mechanism (60)
Cavity (62) be arranged in outer camcylinder (26) cylinder thickest position, card slot (68) be arranged in interior camcylinder (22) cylinder
Wall corresponding position periphery, card slot (68) quantity are two, and one is arranged in interior camcylinder (22) barrel thickest position；One
It is a to be arranged in interior camcylinder (22) barrel minimum wall thickness (MINI W.) position.
7. according to claim 1,2,4,6 described in any item enhanced static pushing type rotary steerable tools, it is characterised in that:
Interior camcylinder (22) barrel minimum wall thickness (MINI W.) is equal with outer camcylinder (26) barrel minimum wall thickness (MINI W.)；And interior camcylinder (22)
Barrel thickest is equal with outer camcylinder (26) barrel thickest.
8. enhanced static pushing type rotary steerable tool according to claim 7, it is characterised in that: biasing mechanism A
(10) use is driven by electricity；Biasing mechanism B(20) use is driven by electricity.
9. enhanced static pushing type rotary steerable tool according to claim 7, it is characterised in that: biasing mechanism A
(10) it is driven using mud；Biasing mechanism B(20) it is driven using mud.
10. a kind of drill assembly, it is characterised in that: including the described in any item enhanced static pushing type rotations of claim 1-9
Turn steering tool, enhanced static pushing type rotary steerable tool rear end connection drill string (2), front end connects drill bit (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810937467.7A CN108979537A (en) | 2018-08-17 | 2018-08-17 | Enhanced static state pushing type rotary steerable tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810937467.7A CN108979537A (en) | 2018-08-17 | 2018-08-17 | Enhanced static state pushing type rotary steerable tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110043188A (en) * | 2019-06-04 | 2019-07-23 | 中国石油大学(华东) | The offset guide mechanism and control method of static guiding type rotary steering drilling tool |
| CN111927340A (en) * | 2020-06-29 | 2020-11-13 | 北京贝威通石油科技有限公司 | Guiding drilling device |
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Application publication date: 20181211 |