CN106150393B - A kind of rotatable drill stem type slipping drilling pipe nipple - Google Patents
A kind of rotatable drill stem type slipping drilling pipe nipple Download PDFInfo
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- CN106150393B CN106150393B CN201510178348.4A CN201510178348A CN106150393B CN 106150393 B CN106150393 B CN 106150393B CN 201510178348 A CN201510178348 A CN 201510178348A CN 106150393 B CN106150393 B CN 106150393B
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Abstract
The present invention provides a kind of rotatable drill stem type slipping drilling pipe nipple, belong to directional well, horizontal well track control field.The rotatable drill stem type slipping drilling pipe nipple includes drilling fluid displacement controlling switch assembly and driving-shaft assembly；The drilling fluid displacement controlling switch assembly includes outer barrel, and inner cylinder, roller, switchs sliding block, the first spring, second spring and drilling fluid baffle arrangement；The driving-shaft assembly includes interior hollow shaft；The upper end of the interior hollow shaft is inserted into the inner cavity of inner cylinder, and is connected with the inner wall lower end of inner cylinder, can be rotated with inner cylinder.
Description
Technical field
The invention belongs to directional well, horizontal well track control field, and in particular to a kind of rotatable drill stem type slides
Pipe nipple is crept into, is suitable for the hole trajectory control that common long horizontal sections horizontal well is developed in unconventionaloil pool field, can strengthen
Rate of penetration is improved while control ability.
Background technology
The shortcomings that to solve slipping drilling, various technologies are developed both at home and abroad：Using advanced rotary steerable tool, due to
Rotatable drill string during guiding, rotary steering overcome the deficiency of slide-and-guide technology, and load transfer is smooth, and rate of penetration is high, well
Eye quality is good.
On the premise of hole trajectory control ability is kept, by studying big bent angle screw rod Applications of Complex Drilling Techniques, reduce and slide
Dynamic drilling machine ratio, improves bit speed；The configuration tool and measure of the screw rod steering drilling tools such as variable gauge stabilizer are applied in research, to the greatest extent
Performance of conventional steering drilling tool etc. may be improved；
It is changed by driving program to top, in slipping drilling, top drives and rotates forward certain number of turns first, then inverts identical
The number of turns, continue the reciprocal above process, the drill string of certain length is to be subject to persistently positive and negative concussion effect, can reduce drill string and well
Frictional force between wall, the rotating number of turns will be limited in the range of certain numerical value.
Patent " drilling water forced oscillation device " (CN201310732942) is mainly short by power section, valve shaft system and vibration
Section part forms, and power tool under conventional well is combined with special valve, and drilling fluid kinetic energy is converted into along drilling tool axial direction
Vibration mechanical energy, and conventional rotation broken rock mode made into the revolution broken rock of the soft change of the pressure of the drill, drilling tool is in the borehole wall
Dynamic friction state, reduces frictional resistance, reduces viscous card possibility, increases the pressure of the drill, so as to further improve efficiency of breaking rock, but influences model
Small overall resistance reducing effect unobvious are enclosed, and waterpower pressure consumption is big.
A kind of patent " above turning downslide drilling well antifriction drop torsion instrument " (CN201220454297), it is proposed that work for drag reduction
Tool, by using the control mode put above is put, there are violent axial vibration in actual drilling process, it may appear that controls difficulty
Problem；Substantially the design of running part is not directed to, for bearing the pipe nipple of 100KN or so axial forces, will appear from comparatively fast grinding
Damage, therefore poor practicability.
Long horizontal sections horizontal well can expand wellbore and the contact area of reservoir, be the unconventionaloil pools such as exploitation shale gas
Hide, and the important technical of hypotonic oil gas field, but since very big frictional resistance, tool-face are put tired during long horizontal sections drilling well
Difficulty causes hole trajectory control difficult, and backing pressure seriously causes rate of penetration low.
Long horizontal sections control Technology for Borehole Trajectory mainly has two classes：First, common steerable motor, by slipping drilling with
Compound drilling alternately realizes TRAJECTORY CONTROL, but frictional resistance is big during slipping drilling, and drilling speed is low, and tool-face puts difficulty, causes to bore
Well efficiency is low, of high cost, and long drilling time is also possible to trigger the down-hole accidents such as borehole well instability and injury reservoir；Second, make
With advanced rotary steerable tool, rotatable drill string during due to being oriented to, load transfer is smooth, and rate of penetration is high, and hole quality is good,
But since rotary steerable tool is mechanical-electrical-hydraulic integration equipment, use and maintenance cost are expensive, are unfavorable for the reduction of shaft building cost.
The potentiality for fully excavating conventional steering tool technology are important research directions both at home and abroad at present, domestic each research institute
Colleges and universities are on the basis of bottom drilling assembly theoretical research and field experience are summarized, to the position of stabilizer, diameter and stratum
The factors such as drillability are studied and summarize to the affecting laws of build angle rate, improve the drilling depth ratio of compound drilling/slipping drilling
Example so that conventional steering drilling tool horizontal well drilling length constantly extends.
On the premise of hole trajectory control ability is kept, by studying big bent angle screw rod Applications of Complex Drilling Techniques, reduce and slide
Dynamic drilling machine ratio, improves bit speed, but the failure frequency rise such as its fracture, abrasion during big elbow screw drilling tool compound drilling；
The configuration tool and measure of the screw rod steering drilling tools such as variable gauge stabilizer are applied in research, improve the property of conventional steering drilling tool as far as possible
Can etc.；Be changed by driving program to top, in slipping drilling, by persistently positive and negative concussion drill string reduce drill string and the borehole wall it
Between frictional force, but shake limited length, and there are the risk of shackle；Hydroscillator is researched and developed, makes brill using hydraulic energy
Column produces axial concussion, reduces the frictional force between column and the borehole wall, but the hydraulic energy consumed is very big.
All kinds of instruments researched and developed at present, are currently promoted the use of, but all there are shortcoming, therefore there is an urgent need to one kind at present
Based on conventional steering tool, while can be with rotary drilling during guide digging smoothly to transmit the pressure of the drill, and can effectively control work
The instrument in tool face.
The content of the invention
It is an object of the invention to solve above-mentioned problem existing in the prior art, there is provided a kind of rotatable drill stem type slides
Pipe nipple is crept into, is used cooperatively with helicoid hydraulic motor, in helicoid hydraulic motor slipping drilling, drill string can rotate forward, and can solve to slide
Dynamic drilling machine takes off the problems such as pressure, rate of penetration be low.
The present invention is achieved by the following technical solutions：
A kind of rotatable drill stem type slipping drilling pipe nipple, including drilling fluid displacement controlling switch assembly and driving-shaft assembly；
The drilling fluid displacement controlling switch assembly includes outer barrel, and inner cylinder, roller, switchs sliding block, the first spring, the second bullet
Spring and drilling fluid baffle arrangement；
The driving-shaft assembly includes interior hollow shaft；
The upper end of the interior hollow shaft is inserted into the inner cavity of inner cylinder, and is connected with the inner wall lower end of inner cylinder, can be with interior
Cylinder rotates together.
Inner cylinder step is equipped with the inner wall of inner cylinder, one end of second spring is fixed on inner cylinder step, and the other end is with boring
One end connection of well liquid baffle arrangement, the other end of drilling fluid baffle arrangement are connected with roller；The telescopic direction of second spring with
The axial direction of inner cylinder is parallel；
At least two circumferentially uniformly distributed through holes are provided with inner cylinder, step is equipped with each through hole, in each institute
State and the switch sliding block is installed in through hole, the end face of the inner cavity side of each switch inward-facing cylinder of sliding block is inclined-plane, institute
Stating roller can roll along the inclined-plane；
The first spring is equipped with the step of the through hole, one end of the first spring is fixed on step, and the other end is with opening
Sliding block connection is closed, the telescopic direction of the first spring is parallel with the radial direction of inner cylinder.
Four circumferentially uniformly distributed through holes are provided with inner cylinder, switch sliding block is equipped with each through hole.
Groove is equipped with the inner wall of outer barrel；When liquid-driving drilling fluid baffle arrangement, second spring elongation, roller edge
Inclined-plane rolls, and the first spring is compressed, and switch sliding block, which is pressed into the groove of outer tube inner wall, to be blocked, and inner cylinder and outer barrel pass through switch
Sliding block connects, and drill string drives inner cylinder and the interior hollow shaft being connected with inner cylinder to rotate by outer barrel；
When the axial force that drilling fluid baffle arrangement produces is less than the pulling force of second spring, drilling fluid baffle arrangement is second
Retracted under the action of spring, roller is retracted therewith, and switch sliding block is sprung back under the action of the first spring, switchs sliding block from outer barrel
Exited in groove, inner cylinder and outer barrel separation.
The outer barrel includes sequentially connected three parts, respectively upper outer barrel, middle outer barrel and lower outer barrel；
The driving-shaft assembly includes cod and journal bearing；The cod is installed on the lower section of inner cylinder；Institute
State the lower section that journal bearing is installed on the cod；
The upper outer sleeve is in the outside of inner cylinder, and middle outer sleeve is in the outside of cod, and lower outer sleeve is in journal bearing
Outside；
The cod is installed between middle outer barrel and interior hollow shaft；
The journal bearing is installed between lower outer barrel and interior hollow shaft.
The rotatable drill stem type slipping drilling pipe nipple includes female connector, the female connector 1 is API standard button-type；
The upper end of female connector can connect drilling tool, and lower end is inserted into outer barrel, be connected with the upper end of the upper outer barrel.
Connector is equipped with the bottom of interior hollow shaft, drilling tool can be connected.
Compared with prior art, the beneficial effects of the invention are as follows：When being crept into using rotatable drill stem type slipping drilling pipe nipple,
Since the reaction torque of helicoid hydraulic motor is supported by the frictional force between the drill string and the borehole wall below rotatable drill stem type slipping drilling pipe nipple
Disappear and keep tool-face to stablize, drill string more than pipe nipple rotates under the driving that ground turntable or top drive, and can thus protect
On the premise of holding hole trajectory control ability, the rotation of most of drill string is kept, axial weight on bit is reduced and transmits resistance, machine can be improved
2-5 times of tool drilling speed.A kind of rotatable drill stem type slipping drilling pipe nipple, applied to directional well, horizontal well track control field,
It is particularly suitable for the hole trajectory control that common long horizontal sections horizontal well is developed in unconventionaloil pool field, can be in the energy that tightens control
Rate of penetration is improved while power.
Brief description of the drawings
The rotatable drill stem type slipping drilling pipe nipple structure diagrams of Fig. 1；
A-A views in Fig. 2 Fig. 1；
Partial enlarged view at the first springs of Fig. 36.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings：
As shown in Figure 1, a kind of rotatable drill stem type slipping drilling pipe nipple, including the control of female connector, drilling fluid displacement are opened
Assembly, driving-shaft assembly three parts are closed, wherein, female connector 1 is API standard button-type；Drilling fluid displacement controlling switch assembly
Including the outer barrel 2 being connected with female connector, inner cylinder 3, roller 4, switchs sliding block 5, the first spring 6, second spring 9, drilling fluid gear
Harden structure 10；Driving-shaft assembly includes cod 7, interior hollow shaft 8 and journal bearing 11 with pin thread.
Inner cylinder 3 is connected with interior hollow shaft 8 by common button-type, can be rotated at the same time；One end of baffle arrangement 10 connects with spring 9
Connect, the other end is connected with roller 4, and when drilling fluid passes through drilling fluid baffle arrangement 10 with certain flow, baffle can produce necessarily
Axial force moved by 4 pull switch sliding block 5 of roller and (because sliding block 5 is equipped with inclined-plane, when liquid-driving baffle 10, keep off
Strip is moved roller 4 and is moved along the inclined-plane of sliding block 5, and then radially promotes sliding block 5), roller 4, which primarily serves, to be reduced frictional force, subtracts
The effect of less wear.Cod 7 be positioned between outer barrel 2 and interior hollow shaft 8 (outer barrel 2 include sequentially connected three
Point, respectively upper outer barrel, middle outer barrel and lower outer barrel, three parts can be connected through a screw thread, upper outer sleeve in the outside of inner cylinder 3,
Middle outer sleeve is in the outside of cod 7, and lower outer sleeve is in the outside of journal bearing 11.), when pipe nipple connect drilling tool when, it is necessary to
When being subject to responsive to axial force, it can freely rotate and reduce abrasion, reduce frictional force, journal bearing 11 is then mainly used for lowering footpath
To abrasion and frictional force.
Rotatable drill stem type slipping drilling pipe nipple can connect drilling tool respectively up and down and be crept into, and screw drill is included in drilling tool
Tool, when needing hole trajectory control, is contrasted according to current well track and designed path first, required for calculating
Helicoid hydraulic motor tool-face, produce certain axial force using larger displacement circulation of drilling fluid, drilling fluid baffle arrangement 10 at this time
Moved by 4 pull switch sliding block 5 of roller, switch sliding block enters the groove of outer barrel 2, and inner/outer tube is connected by switching sliding block, can
Drive mutually mutually rotating.Turn dynamic drill string using turntable or top on ground at this time, drill string by outer barrel drive inner cylinder and with
The interior axle 8 that inner cylinder is connected rotates, and interior axle 8 drives the drill string rotating of helicoid hydraulic motor included below.Rotate to required instrument
Face, stops rotating immediately, and recovers to smaller drilling fluid displacement, and the axial force that drilling fluid baffle arrangement 10 produces is less than the second bullet
The pulling force of spring 9, drilling fluid baffle arrangement 10 back retreat, and switch sliding block 5 is in 6 (as shown in Figures 2 and 3, the first bullet of the first spring
6 one end of spring is connected with sliding block 5, and the other end is connected with inner cylinder 3, and sliding block 5 and inner cylinder 3 all machined the position for placing spring.When
Roller 4 is retracted when not pushing down sliding block 5, and sliding block 5 can rebound) under the action of spring back, exit the groove of outer barrel 2, it is inside and outside
Cylinder separation.Gradually apply the pressure of the drill in ground rotary drill column again at this time, start normal drilling.
Sliding block number has relation with sliding block material intensity and size, and 4 sliding blocks are evenly arranged in Fig. 2 except proof strength
Outside, also help and operate steadily.Second spring 9 and baffle 10 can use the structure of a whole circle.
The drill string of certain length is connected between rotatable drill stem type slipping drilling pipe nipple and helicoid hydraulic motor, its length is by spiral shell
Frictional force between the reaction torque and this length drill string and the borehole wall of bar drill tool determines.During normal drilling, due to helicoid hydraulic motor
Reaction torque is offset by the frictional force between the drill string and the borehole wall below rotatable drill stem type slipping drilling pipe nipple and keeps tool-face
Stablize, drill string more than pipe nipple rotates under the driving that ground turntable or top drive, and can thus keep hole trajectory control
On the premise of ability, the rotation of most of drill string is kept, reduces load transfer resistance, improves rate of penetration.
Transmission shaft totally primarily serves guaranteeing role, when pipe nipple works normally, is subject to 10 or so huge axial forces, laterally
Stress at the same time, under the action of above two power, will keep outer barrel to rotate, inner cylinder is motionless, it is necessary to use cod 7 and footpath
To bearing 11, to play the role of reducing abrasion and frictional force, the flexible and reliability of pipe nipple is improved.
When specifically used, first according to the friction coefficient between drill string specification, drill string and the borehole wall, helicoid hydraulic motor reaction torque with
And the pressure of the drill calculates the length between rotatable drill stem type slipping drilling pipe nipple and helicoid hydraulic motor, its length is by the anti-of helicoid hydraulic motor
Frictional force between moment of torsion and this length drill string and the borehole wall determines.In lower brill, pipe nipple is pacified according to the length of calculating
Dress.
Under when being drilled into shaft bottom, rotary drilling well liquid measures current hole angle, azimuth and tool face azimuth.According to wellbore rail
The requirement of mark control, calculates required tool face azimuth.Then gradually increase drilling fluid displacement, inner/outer tube are connected by switching sliding block
Connect, can drive mutually mutually rotating.Dynamic drill string is turned using turntable or top on ground at this time, drives helicoid hydraulic motor included below
Drill string rotating.Rotation is stopped rotating, and recover to smaller drilling fluid displacement, drilling fluid baffle immediately to required tool-face
The axial force that structure produces is less than the pulling force of spring, and drilling fluid baffle arrangement back retreats, and switch sliding block is under the action of the spring
Rebound, releases the groove of outer barrel, inner/outer tube separation.Gradually apply the pressure of the drill in ground rotary drill column again at this time, start normal bore
Into.Since frictional force counteracts the reaction torque of helicoid hydraulic motor so that helicoid hydraulic motor tool face azimuth is stablized, therefore drilling tool can be according to setting
Meter realizes the target of hole trajectory control.In conventional orientation process, whole drill string cannot rotate, the huge friction mechanical resistance in axial direction
Hinder load transfer, reduce rate of penetration；And after rotatable drill stem type slipping drilling pipe nipple is installed, pipe nipple can be revolved with upper drill
Turn, rotate and overcome most frictional force, frictional force very little in axial direction, the pressure of the drill can be transmitted smoothly, and rate of penetration is significantly
Degree improves.
By one section of drilling, well track design object is had reached, it is necessary into angle holding drilling, then increases discharge capacity to opening
Start or stop is moved, and ground turntable or top drive and drive whole drill string rotating, will since helicoid hydraulic motor bent angle is no longer point to a direction
Realize angle holding drilling, since whole drill string is in rotation, effectively reduces backing pressure effect, improve rate of penetration.
The present invention has used for reference the structure of screw drive assembly, mature and reliable.Switching mechanism uses displacement control.The present invention can
So that ground to the drill string between the present invention rotates, the drill string of rotation accounts for the ratio of whole drill string more than 90%, therefore can be notable
Reduce axial friction.The process not inverted, there is no the risk of shackle.
The rotatable drill stem type slipping drilling pipe nipple of the present invention, including female connector, drilling fluid displacement controlling switch assembly, biography
Moving axis assembly three parts.When using larger displacement circulation of drilling fluid, drilling fluid baffle arrangement produces certain axial force and leads to
Roller pull switch slide block movement is crossed, switch sliding block enters the groove of outer barrel, and inner/outer tube is connected by switching sliding block, can mutual facies tract
Dynamic mutually rotating, ground is turned dynamic drill string and can be driven the drill string rotating of helicoid hydraulic motor included below using turntable or top.Recover extremely
Smaller drilling fluid displacement, switch sliding block move back the groove of outer barrel, inner/outer tube separation.At this time again below ground rotary drill column, pipe nipple
Drill string does not rotate, and realizes the slide-and-guide drilling under drill string rotating operating mode.Backing pressure effect can be effectively reduced, improves rate of penetration
Above-mentioned technical proposal is one embodiment of the present invention, for those skilled in the art, at this
On the basis of disclosure of the invention application process and principle, it is easy to make various types of improvement or deformation, be not limited solely to this
Invent the described method of above-mentioned embodiment, therefore previously described mode is simply preferable, and and without limitation
The meaning of property.
Claims (5)
- A kind of 1. rotatable drill stem type slipping drilling pipe nipple, it is characterised in that：The rotatable drill stem type slipping drilling pipe nipple bag Include drilling fluid displacement controlling switch assembly and driving-shaft assembly；The drilling fluid displacement controlling switch assembly includes outer barrel, inner cylinder, roller, switchs sliding block, the first spring, second spring and Drilling fluid baffle arrangement；The driving-shaft assembly includes interior hollow shaft；The upper end of the interior hollow shaft is inserted into the inner cavity of inner cylinder, and is connected with the inner wall lower end of inner cylinder, can be with inner cylinder one Play rotation；Inner cylinder step is equipped with the inner wall of inner cylinder, one end of second spring is fixed on inner cylinder step, the other end and drilling fluid One end connection of baffle arrangement, the other end of drilling fluid baffle arrangement are connected with roller；The telescopic direction and inner cylinder of second spring Axial direction it is parallel；At least two circumferentially uniformly distributed through holes are provided with inner cylinder, step is equipped with each through hole, each described logical The switch sliding block is installed, the end face of the inner cavity side of each switch inward-facing cylinder of sliding block is inclined-plane, the rolling in hole Wheel can be rolled along the inclined-plane；The first spring is equipped with the step of the through hole, one end of the first spring is fixed on step, and the other end is slided with switch Block connects, and the telescopic direction of the first spring is parallel with the radial direction of inner cylinder；Groove is equipped with the inner wall of outer barrel；When liquid-driving drilling fluid baffle arrangement, second spring elongation, roller is along inclined-plane Roll, the first spring is compressed, and switch sliding block, which is pressed into the groove of outer tube inner wall, to be blocked, and inner cylinder and outer barrel are by switching sliding block Connection, drill string drive inner cylinder and the interior hollow shaft being connected with inner cylinder to rotate by outer barrel；When the axial force that drilling fluid baffle arrangement produces is less than the pulling force of second spring, drilling fluid baffle arrangement is in second spring Under the action of retract, roller is retracted therewith, switch sliding block sprung back under the action of the first spring, switch groove of the sliding block from outer barrel In exit, inner cylinder and outer barrel separation.
- 2. rotatable drill stem type slipping drilling pipe nipple according to claim 1, it is characterised in that：It is provided with inner cylinder in circle Four uniformly distributed through holes, are equipped with switch sliding block in each through hole on week.
- 3. rotatable drill stem type slipping drilling pipe nipple according to claim 1, it is characterised in that：The outer barrel is included successively The three parts of connection, respectively upper outer barrel, middle outer barrel and lower outer barrel；The driving-shaft assembly includes cod and journal bearing；The cod is installed on the lower section of inner cylinder；The footpath The lower section of the cod is installed on to bearing；The upper outer sleeve is in the outside of inner cylinder, and middle outer sleeve is in the outside of cod, and lower outer sleeve is in the outer of journal bearing Portion；The cod is installed between middle outer barrel and interior hollow shaft；The journal bearing is installed between lower outer barrel and interior hollow shaft.
- 4. rotatable drill stem type slipping drilling pipe nipple according to claim 3, it is characterised in that：The rotatable drill stem type Slipping drilling pipe nipple includes female connector, the female connector is API standard button-type；The upper end of female connector can connect brill Tool, lower end is inserted into outer barrel, is connected with the upper end of the upper outer barrel.
- 5. rotatable drill stem type slipping drilling pipe nipple according to claim 4, it is characterised in that：In the most lower of interior hollow shaft End is equipped with connector, can connect drilling tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510178348.4A CN106150393B (en) | 2015-04-15 | 2015-04-15 | A kind of rotatable drill stem type slipping drilling pipe nipple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510178348.4A CN106150393B (en) | 2015-04-15 | 2015-04-15 | A kind of rotatable drill stem type slipping drilling pipe nipple |
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| CN106150393A CN106150393A (en) | 2016-11-23 |
| CN106150393B true CN106150393B (en) | 2018-04-20 |
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| CN201510178348.4A Active CN106150393B (en) | 2015-04-15 | 2015-04-15 | A kind of rotatable drill stem type slipping drilling pipe nipple |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108179981A (en) * | 2018-01-05 | 2018-06-19 | 江小三 | A kind of rotational slide boring means |
| CN108019172A (en) * | 2018-01-10 | 2018-05-11 | 中国石油大学(华东) | A kind of deep water rotation control pipe nipple inner cylinder hydraulic locking apparatus |
| CN111255433B (en) * | 2020-03-02 | 2021-07-27 | 北京四利通控制技术股份有限公司 | Anti-sticking anti-drag automatic torsional pendulum control method for well drilling sliding drilling |
| CN112814580B (en) * | 2021-01-07 | 2023-07-25 | 铁正检测科技有限公司 | Concrete core machine drilling rod for road detection |
| CN113073938B (en) * | 2021-03-19 | 2022-01-11 | 四川宏华石油设备有限公司 | Rotary guide tool |
| CN114876367B (en) * | 2022-05-11 | 2024-01-23 | 西南石油大学 | Displacement controlled drill string composite drilling function controller |
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| WO2007138314A1 (en) * | 2006-05-01 | 2007-12-06 | Geolink (Uk) Limited | Rotary steerable tool |
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| CN106150393A (en) | 2016-11-23 |
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