CN110374528A - ECD drilling well liquid jetting device is reduced in a kind of deepwater drilling - Google Patents
ECD drilling well liquid jetting device is reduced in a kind of deepwater drilling Download PDFInfo
- Publication number
- CN110374528A CN110374528A CN201910693274.6A CN201910693274A CN110374528A CN 110374528 A CN110374528 A CN 110374528A CN 201910693274 A CN201910693274 A CN 201910693274A CN 110374528 A CN110374528 A CN 110374528A
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- China
- Prior art keywords
- drilling
- drilling fluid
- feed mechanism
- rod
- deepwater
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/001—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor specially adapted for underwater drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
Abstract
The invention discloses ECD drilling well liquid jetting device is reduced in a kind of deepwater drilling, controller of the invention can automatically adjust relative rotation speed of the outer control pivoted housing relative to the drilling rod according to the drilling well revolving speed of drilling rod, in this way, the rate of discharge to drilling fluid lower part drilling cuttings can effectively be improved, effectively reduce gathering for drilling cuttings, in order to reduce the ECD of drilling fluid, simultaneously, the present invention uses the helical groove structure of the round helicla flute of upper half and dirty waterline helicla flute to link together, the expulsion efficiency to various shape drilling cuttings may be implemented, improve chip removal ability, prevent blocking catching phenomenon；Controller of the invention can automatically adjust the ratio for the drilling fluid rate that the first drilling fluid feed mechanism and the second drilling fluid feed mechanism are supplied according to the drilling well revolving speed of drilling rod, by realizing the adjusting to solid phase ratio in drilling fluid, effectively equivalent circulating density can be controlled, while guaranteeing the efficiency of deepwater drilling, the reliability of drilling well is improved.
Description
Technical field
The present invention relates to deepwater drilling technical field, ECD drilling well liquid jetting device is reduced in specifically a kind of deepwater drilling.
Background technique
Borehole pressure control is key link in drilling process, especially for deepwater drilling, in drilling well, is needed pair
Pressure is effectively controlled, wherein in controling effectively to pressure, equivalent circulating density (abbreviation ECD) is control well
The important parameter of bottom pressure, under normal circumstances, reducing equivalent circulating density tool can solve the ring due to caused by friction loss
The increase of empty Fluid pressure can also solve landwaste loading problem by reducing hydrostatic pressure head summation.
In drilling well, it is however generally that, in drilling rod when being drilled with speed increase, the ECD of drilling fluid can significantly increase, and
Drilling rod be drilled with revolving speed increase when, the difficulty that chip removal often becomes can also aggravate the increase of ECD, this in deepwater drilling especially
Significantly, therefore, it in order to guarantee the safety of drilling well, needs effectively control effectively to the ECD of drilling fluid.
Therefore, the present invention provides ECD drilling well liquid jetting device is reduced in a kind of deepwater drilling, to solve above-mentioned background skill
The problem of being proposed in art.
Summary of the invention
The purpose of the present invention is to provide ECD drilling well liquid jetting device is reduced in a kind of deepwater drilling, to solve above-mentioned back
The problem of being proposed in scape technology.
To achieve the above object, the invention provides the following technical scheme: reducing the injection of ECD drilling fluid in a kind of deepwater drilling
Device, including the first drilling fluid feed mechanism, the second drilling fluid feed mechanism, jet bit, drilling rod, outer control pivoted housing, wherein
For the drilling rod by drilling well driving equipment drive shaft, the bottom of the drilling rod, which is fixedly connected, is provided with the jet bit, described
Drilling rod is the hollow structure with hollow hole, and the upper end of the drilling rod and the first drilling fluid feed mechanism, the second drilling well
Liquid feed mechanism connection, which is characterized in that the outside of the drilling rod is also relatively turnable to be arranged with the outer control pivoted housing, institute
The periphery for stating the top of outer control pivoted housing is provided with helical flute；
Solid phase particles concentration is greater than second drilling fluid in the drilling fluid that the first drilling fluid feed mechanism is supplied
Solid phase particles concentration in the drilling fluid that feed mechanism is supplied；
It further include controller, the controller can automatically adjust the outer control according to the drilling well revolving speed of the drilling rod
Relative rotation speed of the pivoted housing relative to the drilling rod, and described first can be automatically adjusted according to the drilling well revolving speed of the drilling rod and bored
The ratio for the drilling fluid rate that well liquid feed mechanism and the second drilling fluid feed mechanism are supplied.
Further, preferably, the controller structure is set as, so that described second bores when the rod rotation speed increases
The drilling fluid rate of well liquid feed mechanism supply increases, and the drilling fluid rate of the first drilling fluid feed mechanism supply subtracts
It is small；When the rod rotation speed reduces, the drilling fluid rate of the second drilling fluid feed mechanism supply reduces, and described first
The drilling fluid rate of drilling fluid feed mechanism supply increases.
Further, preferably, being additionally provided with direct driving motor, the straight drive between the drilling rod and the outer control pivoted housing
Outer control pivoted housing rotation described in motor driven.
Further, preferably, the outer control pivoted housing includes lower limit section, drive section and upper spiral section, wherein described
Fixing sleeve is equipped with limit sleeve on the bottom limit base of drilling rod, and the lower limit section protrudes into and axial limiting is in the limit sleeve,
The direct driving motor is arranged in drive section, and the upper end of the drive section and the upper spiral section use ladder connector fixing sleeve
If connection, is additionally provided with rolling bearing between the drive section and the outer wall of the drilling rod.
Further, preferably, the helical flute on the upper spiral section includes the round helicla flute of upper half and down-flow water
Line helicla flute, wherein the cross section of the round helicla flute of upper half be semicircular structure, the dirty waterline helicla flute it is transversal
Face is pipeline-type groove structure, and the round helicla flute of the upper half and dirty waterline helicla flute spiral link together.
Further, preferably, be additionally provided with below the helical flute of the upper spiral section be radially therefrom it is interior lateral
The auxiliary chip-removal hole that outside and in the axial direction inclined upward extend, the permission part drilling fluid that the auxiliary chip-removal hole is capable of interval are straight
Connect the discharge upwards inside the drilling rod.
Further, preferably, the auxiliary chip-removal hole is the multiple of circumference laying, and in each auxiliary chip-removal hole
It is provided with control opening and closing valve.
Further, preferably, the bottom side of the wall of the jet bit is provided with drilling well sword, and the bottom of the jet bit
Portion's surrounding is provided with multiple spray-holes extended obliquely downward.
Further, preferably, removably being connected between the jet bit and the drilling rod.
Further, preferably, the top of the drilling rod is provided centrally with drilling fluid supply joint, the drilling fluid is supplied
Be connected to connector with the first drilling fluid feed mechanism, the second drilling fluid feed mechanism, and the drilling fluid supply joint with it is described
Rotatably it is arranged between drilling rod.
Compared with prior art, the beneficial effects of the present invention are:
(1) ECD drilling well liquid jetting device is reduced in deepwater drilling of the present invention, controller can be according to the drilling well revolving speed of drilling rod
Outer relative rotation speed of the control pivoted housing relative to the drilling rod is automatically adjusted, in this way, can effectively improve to drilling fluid lower part
The rate of discharge of drilling cuttings effectively reduces gathering for drilling cuttings, in order to reduce the ECD of drilling fluid, meanwhile, the present invention uses upper half
The helical groove structure of round helicla flute and dirty waterline helicla flute to link together, may be implemented the row to various shape drilling cuttings
Efficiency out improves chip removal ability, prevents blocking catching phenomenon；
(2) controller of the invention can automatically adjust the first drilling fluid supply machine according to the drilling well revolving speed of drilling rod
The ratio for the drilling fluid rate that structure and the second drilling fluid feed mechanism are supplied, by realizing the tune to solid phase ratio in drilling fluid
Section, can effectively control equivalent circulating density, while guaranteeing the efficiency of deepwater drilling, improve the reliable of drilling well
Property.
Detailed description of the invention
Fig. 1 is the overall structure diagram that ECD drilling well liquid jetting device is reduced in a kind of deepwater drilling；
Fig. 2 is the outer control pivoted housing position partial enlargement knot reduced in ECD drilling well liquid jetting device in a kind of deepwater drilling
Structure schematic diagram；
Fig. 3 is that debris slot structure schematic diagram in ECD drilling well liquid jetting device is reduced in a kind of deepwater drilling.
Specific embodiment
It please refers to Fig. 1~3, in the embodiment of the present invention, reduces ECD drilling well liquid jetting device in a kind of deepwater drilling, including
First drilling fluid feed mechanism 1, the second drilling fluid feed mechanism 2, jet bit 10, drilling rod 8, outer control pivoted housing 6, wherein institute
Drilling rod is stated by drilling well driving equipment drive shaft, the bottom of the drilling rod, which is fixedly connected, is provided with the jet bit 10, described
Drilling rod is the hollow structure with hollow hole, and the upper end of the drilling rod and the first drilling fluid feed mechanism 1, the second drilling well
Liquid feed mechanism 2 is connected to, which is characterized in that and the outside of the drilling rod is also relatively turnable to be arranged with the outer control pivoted housing 6,
The periphery on the top of the outer control pivoted housing 6 is provided with helical flute 4；
Solid phase particles concentration is greater than second drilling fluid in the drilling fluid that the first drilling fluid feed mechanism 1 is supplied
Solid phase particles concentration in the drilling fluid that feed mechanism 2 is supplied；
It further include controller, the controller can automatically adjust the outer control according to the drilling well revolving speed of the drilling rod
Relative rotation speed of the pivoted housing 6 relative to the drilling rod, and described first can be automatically adjusted according to the drilling well revolving speed of the drilling rod
The ratio for the drilling fluid rate that drilling fluid feed mechanism 1 and the second drilling fluid feed mechanism 2 are supplied.
In the present embodiment, the controller structure is set as, so that when the rod rotation speed increases, second drilling fluid
The drilling fluid rate that feed mechanism 2 supplies increases, and the drilling fluid rate of the first drilling fluid feed mechanism 1 supply reduces；
When the rod rotation speed reduces, the drilling fluid rate that the second drilling fluid feed mechanism 2 supplies reduces, and described first bores
The drilling fluid rate that well liquid feed mechanism 1 supplies increases.
As preferred embodiment, it is additionally provided with direct driving motor 5 between the drilling rod and the outer control pivoted housing 6, it is described
The direct driving motor driving outer control pivoted housing rotation.
Wherein, the outer control pivoted housing 6 includes lower limit section, drive section and upper spiral section 40, wherein the bottom of the drilling rod
Fixing sleeve is equipped with limit sleeve 15 on portion's limit base 7, and the lower limit section protrudes into and axial limiting is in the limit sleeve, described straight
It drives motor 5 to be arranged in drive section, the upper end of the drive section is arranged with the upper spiral section using the fixation of ladder connector 14
Connection, is additionally provided with rolling bearing 13 between the drive section and the outer wall of the drilling rod.
As preferred embodiment, the helical flute 4 on the upper spiral section 40 includes the round helicla flute of upper half under
Assembly line helicla flute 42, wherein the cross section of the round helicla flute of upper half is semicircular structure, the dirty waterline helicla flute
42 cross section is pipeline-type groove structure, and the round helicla flute of the upper half and dirty 42 spiral of waterline helicla flute are connected to
Together.
Wherein, the lower section of the helical flute 4 of the upper spiral section, which is additionally provided with, is radially therefrom Inside To Outside and to axis
The auxiliary chip-removal hole 44 of extension is tilted upwards, and the auxiliary chip-removal hole 44 is capable of the permission part drilling fluid of interval directly from institute
State discharge upwards inside drilling rod.
In the present invention, the auxiliary chip-removal hole 44 is the multiple of circumference laying, and in each auxiliary chip-removal hole 44
It is provided with control opening and closing valve 43.
The bottom side of the wall of the jet bit 10 is provided with drilling well sword 12, and the bottom surrounding of the jet bit is provided with
Multiple spray-holes 11 extended obliquely downward.It is removably connected between the jet bit and the drilling rod.
Wherein, the top of the drilling rod is provided centrally with drilling fluid supply joint 3, the drilling fluid supply joint 3 with
First drilling fluid feed mechanism 1, the connection of the second drilling fluid feed mechanism 2, and the drilling fluid supply joint 3 and the drilling rod it
Between be rotatably arranged.
In deepwater drilling of the present invention reduce ECD drilling well liquid jetting device, controller can according to the drilling well revolving speed of drilling rod come
Relative rotation speed of the outer control pivoted housing of automatic adjustment relative to the drilling rod, bores drilling fluid lower part in this way, can effectively improve
The rate of discharge of bits effectively reduces gathering for drilling cuttings, in order to reduce the ECD of drilling fluid, meanwhile, the present invention uses upper semi-circle
The helical groove structure of type helicla flute and dirty waterline helicla flute to link together, may be implemented the discharge to various shape drilling cuttings
Efficiency improves chip removal ability, prevents blocking catching phenomenon；Controller of the invention can be according to the drilling well revolving speed of drilling rod come automatic
The ratio for adjusting the drilling fluid rate that the first drilling fluid feed mechanism and the second drilling fluid feed mechanism are supplied, passes through reality
Now to the adjusting of solid phase ratio in drilling fluid, effectively equivalent circulating density can be controlled, guarantee the effect of deepwater drilling
While rate, the reliability of drilling well is improved.
It is above-described, it is merely preferred embodiments of the present invention, but protection scope of the present invention is not limited to
This, anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention
And its inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (10)
1. reducing ECD drilling well liquid jetting device, including the first drilling fluid feed mechanism (1), the second drilling well in a kind of deepwater drilling
Liquid feed mechanism (2), jet bit (10), drilling rod (8), outer control pivoted housing (6), wherein the drilling rod is by drilling well driving equipment
Drive shaft, the bottom of the drilling rod, which is fixedly connected, to be provided with the jet bit (10), and the drilling rod is with hollow hole
Hollow structure, and the upper end of the drilling rod and the first drilling fluid feed mechanism (1), the second drilling fluid feed mechanism (2) are even
It is logical, which is characterized in that the outside of the drilling rod is also relatively turnable to be arranged with the outer control pivoted housing (6), the outer control
The periphery on the top of pivoted housing (6) is provided with helical flute (4)；
Solid phase particles concentration is supplied greater than second drilling fluid in the drilling fluid that the first drilling fluid feed mechanism (1) is supplied
Solid phase particles concentration in the drilling fluid supplied to mechanism (2)；
It further include controller, the controller can automatically adjust the outer control pivoted housing according to the drilling well revolving speed of the drilling rod
(6) relative rotation speed relative to the drilling rod, and described first can be automatically adjusted according to the drilling well revolving speed of the drilling rod and bored
The ratio for the drilling fluid rate that well liquid feed mechanism (1) and the second drilling fluid feed mechanism (2) are supplied.
2. reducing ECD drilling well liquid jetting device in a kind of deepwater drilling according to claim 1, which is characterized in that described
Controller structure is set as, so that when the rod rotation speed increases, the drilling well liquid speed of the second drilling fluid feed mechanism (2) supply
Rate increases, and the drilling fluid rate of the first drilling fluid feed mechanism (1) supply reduces；When the rod rotation speed reduces,
The drilling fluid rate of second drilling fluid feed mechanism (2) supply reduces, and the first drilling fluid feed mechanism (1) supplies
Drilling fluid rate increase.
3. reducing ECD drilling well liquid jetting device in a kind of deepwater drilling according to claim 1, which is characterized in that described
It is additionally provided with direct driving motor (5) between drilling rod and the outer control pivoted housing (6), the direct driving motor drives the outer control pivoted housing
Rotation.
4. reducing ECD drilling well liquid jetting device in a kind of deepwater drilling according to claim 1, which is characterized in that described
Outer control pivoted housing (6) includes lower limit section, drive section and upper spiral section (40), wherein on the bottom limit base (7) of the drilling rod
Fixing sleeve is equipped with limit sleeve (15), and the lower limit section protrudes into and axial limiting is in the limit sleeve, the direct driving motor (5)
It is arranged in drive section, the upper end of the drive section is connect with the upper spiral section using ladder connector (14) fixed be arranged,
Rolling bearing (13) are additionally provided between the drive section and the outer wall of the drilling rod.
5. reducing ECD drilling well liquid jetting device in a kind of deepwater drilling according to claim 4, which is characterized in that described
Helical flute (4) on upper spiral section (40) includes the round helicla flute of upper half and dirty waterline helicla flute (42), wherein described
The cross section of the round helicla flute of upper half is semicircular structure, and the cross section of the dirty waterline helicla flute (42) is that pipeline-type is recessed
Slot structure, and the round helicla flute of the upper half and dirty waterline helicla flute (42) spiral link together.
6. reducing ECD drilling well liquid jetting device in a kind of deepwater drilling according to claim 4, which is characterized in that described
Be additionally provided with below the helical flute (4) of upper spiral section be radially therefrom Inside To Outside and in the axial direction inclined upward extend
Assist chip-removal hole (44), auxiliary chip-removal hole (44) be capable of the permission part drilling fluid of interval directly inside the drilling rod to
Upper discharge.
7. reducing ECD drilling well liquid jetting device in a kind of deepwater drilling according to claim 6, which is characterized in that described
Assisting chip-removal hole (44) is the multiple of circumference laying, and control opening and closing valve is provided in each auxiliary chip-removal hole (44)
(43)。
8. reducing ECD drilling well liquid jetting device in a kind of deepwater drilling according to claim 6, which is characterized in that described
The bottom side of the wall of jet bit (10) is provided with drilling well sword (12), and the bottom surrounding of the jet bit is provided with multiple inclinations
The spray-hole (11) extended downwardly.
9. reducing ECD drilling well liquid jetting device in a kind of deepwater drilling according to claim 8, which is characterized in that described
It is removably connected between jet bit and the drilling rod.
10. reducing ECD drilling well liquid jetting device in a kind of deepwater drilling according to claim 8, which is characterized in that described
The top of drilling rod is provided centrally with drilling fluid supply joint (3), and the drilling fluid supply joint (3) and the first drilling fluid supply
Mechanism (1), the connection of the second drilling fluid feed mechanism (2), and can be rotated between the drilling fluid supply joint (3) and the drilling rod
Setting.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910693274.6A CN110374528B (en) | 2019-07-29 | 2019-07-29 | Drilling fluid injection device for reducing ECD in deep water drilling |
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| CN201910693274.6A CN110374528B (en) | 2019-07-29 | 2019-07-29 | Drilling fluid injection device for reducing ECD in deep water drilling |
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