CN103015892A - Variable-diameter stabilizer and variable-diameter stabilizer system - Google Patents
Variable-diameter stabilizer and variable-diameter stabilizer system Download PDFInfo
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- CN103015892A CN103015892A CN2012105831869A CN201210583186A CN103015892A CN 103015892 A CN103015892 A CN 103015892A CN 2012105831869 A CN2012105831869 A CN 2012105831869A CN 201210583186 A CN201210583186 A CN 201210583186A CN 103015892 A CN103015892 A CN 103015892A
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Abstract
The invention provides a variable-diameter stabilizer. The variable-diameter stabilizer comprises a housing, an upper mandrel and a lower mandrel, wherein an upper high-pressure mud cavity is formed in the upper mandrel in the direction of the axial line of a housing, a lower high-pressure mud cavity is formed in the lower mandrel in the direction of the axial line of the housing, the variable-diameter stabilizer further comprises a mud pressure changing device, the mud pressure changing device comprises a mushroom head assembly and a center hole, the center hole is formed in the upper end of the upper mandrel, the diameter of the upper end of the center hole is larger than that of the lower end, and the center hole is communicated with the upper high-pressure mud cavity; the mushroom head assembly is arranged above the center hole and fixed on the inner wall of the housing; and when the variable-diameter stabilizer is positioned in a working state, the area of passage of mud at the mushroom head assembly and the center hole is maximum, the pressure born by the variable-diameter stabilizer in the working state can be effectively reduced, and the variable-diameter stabilizer is safe and reliable. The invention further provides a variable-diameter stabilizer system, which can effectively reduce the pressure born by the variable-diameter stabilizer in the working state, and the variable-diameter stabilizer is safe and reliable.
Description
Technical field
The present invention relates to oil, geological drilling equipment technical field, relate in particular to a kind of tapered stabilizer and system thereof.
Background technology
As everyone knows, when oil exploitation or geological prospecting, often need to carry out drilling well to underground with drill bit.Because when some oil exploitations or geological prospecting, its drilling depth can reach several kms.In drilling process, in order to guarantee the quality of drilling well, guarantee simultaneously the safety of drill bit and drilling rod, often need the hole angle of the well of drilling well is controlled in certain scope, guarantee that namely drill bit is by boring under the default track.
At present, people often install tapered stabilizer at the top of drill bit in order to guarantee the hole angle of well, utilize tapered stabilizer and drilling well inwall to fit, thereby guarantee that drill bit is by boring under the default course bearing.
Concrete, a kind of drilling remote control tapered stabilizer is disclosed such as Chinese patent literature CN2854043Y, it is provided with upper spindle and lower spindle in housing, and form a high-pressure slurry chamber that connects in the inside of upper spindle and lower spindle along axis direction, it is socketed with dummy piston and silently at the lower end of lower spindle outer wall, and form a low pressure mud chamber at dummy piston and silently, be formed with a through hole at the housing that is positioned at place, low pressure mud chamber simultaneously; When mud enters into the high-pressure slurry chamber through drilling rod, because area of passage reduces, thereby control upper spindle and lower spindle move down in housing, utilize simultaneously the open and close of slush pump, the cam body that is equipped with and cam pin, so that upper spindle rests on three different operating positions with lower spindle, simultaneously so that the radial piston that arranges on the drilling remote control tapered stabilizer is positioned at three different operating positions, thereby realize the reducing of drilling remote control tapered stabilizer, the final control that realizes hole angle.
But because when drilling well, this drilling remote control tapered stabilizer is positioned at dark underground of several kms, so which kind of operating position the radial piston on the how to confirm tapered stabilizer is in and just becomes technological difficulties.For this reason, also be provided with the mud pressure variations device among the Chinese patent literature CN2854043Y, be used for changing the pressure of mud, thereby judge the residing duty of tapered stabilizer; Specifically adopt and below lower spindle, locate to arrange orifice plate assembly and mushroom head assembly, it utilizes upper spindle and lower spindle when moving down, distance changes between orifice plate assembly and the mushroom head assembly, so that mud is through the variation of the area of passage between orifice plate assembly and the mushroom head assembly, thereby change the pressure of mud, utilize the variation of mud pressure to realize the operating position of upper spindle and lower spindle is judged, finally realized the operating position of piston is radially judged, and then realized remote-control diameter-variable.
But when adopting above-mentioned mud pressure variations device, when tapered stabilizer was in the drilling well duty, the distance between the centre bore in the orifice plate assembly and the mushroom head assembly was minimum, and mud pressure is relatively the highest; Therefore meeting is so that tapered stabilizer is in high pressure conditions, and because tapered stabilizer need to be in the drilling well duty for a long time, therefore easily so that tapered stabilizer damage, even damage, thereby so that the terrestrial operation personnel can not be by the pressure meter monitoring of slush pump and the mud pressure in the record slush pump, can't accurately learn the duty of tapered stabilizer, and then drilling well work is impacted.
Summary of the invention
The object of the present invention is to provide a kind of tapered stabilizer and system thereof, it has avoided descending in working order tapered stabilizer to bear too high pressure effectively.
A kind of tapered stabilizer provided by the invention, comprise housing, upper mandrel and lower mandrel, the inside of described upper mandrel is formed with upper high-pressure slurry chamber along the axis direction of described housing, the inside of described lower mandrel is formed with lower high-pressure slurry chamber along the axis direction of described housing, the lower end of described upper mandrel and the upper end of described lower mandrel are connected and fixed, and described upper high-pressure slurry chamber and the connection of described lower high-pressure slurry chamber;
Also comprise the mud pressure variations device, described mud pressure variations device is comprised of mushroom head assembly and centre bore, described centre bore is arranged on the top of described upper mandrel, and the upper end diameter of described centre bore is greater than lower end diameter, and described centre bore is communicated with described upper high-pressure slurry chamber; Described mushroom head assembly is arranged on the top of described centre bore and is fixed on the inwall of described housing.
Optionally, be evenly equipped with at least three aerofoils on the outer wall of described housing, and described aerofoil extends twist along the axis direction of described housing, on each described aerofoil along being evenly equipped with at least four piston putting holes on its spiral extension direction, and the quantity of the described piston putting hole that arranges on each described aerofoil is all identical, is placed with radial piston in the described piston putting hole;
Axis direction along described shell on the outer wall of described lower mandrel is socketed with at least four clinohedrals successively, and the quantity of the described radial piston that arranges on the quantity of described clinohedral and each described aerofoil equates;
The outer wall of described clinohedral is evenly equipped with at least three inclined plane parts, and the quantity of the described inclined plane part that arranges on each described clinohedral equates with the quantity of described aerofoil;
Described radial piston is corresponding one by one with described inclined plane part, and the base abuts of described radial piston is on described inclined plane part.
Optionally, the quantity of described aerofoil is three, and the quantity of the described inclined plane part that arranges on each described inclined plane part is three.
Optionally, be evenly equipped with five described piston putting holes on each described aerofoil, the quantity of described clinohedral is five.
Optionally, described housing comprises upper body, central enclosure and lower case, and the bottom of described upper body and the top of described central enclosure are affixed, and the bottom of described central enclosure and the top of described lower case are affixed.
Optionally, the bottom of described upper body is threaded with the top of described central enclosure, and the bottom of described central enclosure and the top of described lower case are threaded.
Optionally, described upper mandrel and described mushroom head assembly are placed in the described upper body, and described aerofoil is arranged on the outer wall of described central enclosure.
Optionally, be provided with T-shaped groove or the dovetail groove that is connected for the bottom with described radial piston on the described inclined plane part.
A kind of tapered stabilizer system that the present invention also provides comprises in computer and the above-mentioned tapered stabilizer any;
Be provided with electronic pressure transmitter on the described mushroom head assembly, described electronic pressure transmitter links to each other with described computer by sender unit.
Optionally, described sender unit is impulse sender.
Compared with prior art, tapered stabilizer provided by the invention, the mud pressure variations device that it arranges by the place, top at upper mandrel, utilize slush pump to start and stop to drive mandrel and lower mandrel is subjected to displacement downwards, thereby change mud through the area of passage of mushroom head assembly and central hole, and then change mud pressure, realized the state of tapered stabilizer is judged, and when tapered stabilizer is in running order, mud is maximum through the area of passage of mushroom head assembly and central hole, thereby effectively reduced the pressure that descends in working order tapered stabilizer to bear, guaranteed the safe and reliable of tapered stabilizer.
In further technical scheme, by uniform at least three aerofoils on the outer wall of housing, and at least four radial pistons of each aerofoil setting, thereby effectively improved the stability of tapered stabilizer when the control well track, guarantee hole angle control within the specific limits.
In further technical scheme, housing adopts split-type structural, is comprised of upper body, central enclosure and lower case, thereby is convenient to processing, is conducive to guarantee the machining accuracy of housing, is convenient to simultaneously installing component in housing.
In further technical scheme, be used for being connected with the bottom of radial piston by T-shaped groove and dovetail groove are set at inclined plane part, thereby effectively improved the stability that radial piston is installed.
Compared with prior art, tapered stabilizer provided by the invention system, the mud pressure variations device that it arranges by the place, top at upper mandrel, utilize slush pump to start and stop to drive mandrel and lower mandrel is subjected to displacement downwards, thereby change mud through the area of passage of mushroom head assembly and central hole, and then change mud pressure, realized the state of tapered stabilizer is judged, and when tapered stabilizer is in running order, mud is maximum through the area of passage of mushroom head assembly and central hole, thereby effectively reduced the pressure that descends in working order tapered stabilizer to bear, guaranteed the safe and reliable of tapered stabilizer.
Simultaneously, its utilization arranges electronic pressure transmitter at the mushroom head assembly, and by sender unit electronic pressure transmitter is obtained pressure signal and be sent to computer, then by the software on the computer pressure signal is decoded, and then read accurately the minor variations of mud pressure, thus can the whole mud pressure that reduces tapered stabilizer inside, thereby so that the safety of tapered stabilizer is higher, also can reduce simultaneously the power of slush pump, reduce energy consumption.
In further technical scheme, sender unit adopts impulse sender, but the efficiency of transmission of Effective Raise pressure signal and reliability reduce the loss of pressure signal in transmission course.
Description of drawings
In order to be illustrated more clearly in the specific embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in the specific embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The front view of the tapered stabilizer that Fig. 1 provides for the embodiment of the invention one;
The internal construction schematic diagram of the tapered stabilizer that Fig. 2 provides for the embodiment of the invention one;
Fig. 3 is that A-A among Fig. 2 is to sectional view;
The structural representation of the tapered stabilizer convexity wheel body that Fig. 4 provides for the embodiment of the invention one;
The structural representation of the tapered stabilizer system that Fig. 5 provides for the embodiment of the invention two.
Description of drawings:
The 1-housing, 11-upper body, 12-central enclosure, 13-lower case;
The upper mandrel of 2-, the upper high-pressure slurry of 21-chamber, 22-back-moving spring, 23-Access Division, 24-spring base;
Mandrel under the 3-, high-pressure slurry chamber under the 31-, the 32-clinohedral, 321-inclined plane part, 322-T type groove, 33-cam body, 34-cam pin, 35-dummy piston, 36-silently, 37-low pressure mud chamber, the 38-through hole, 39-controls chute;
4-mud pressure variations device, 41-mushroom head assembly, 42-centre bore;
The 5-aerofoil, 51-piston putting hole, 52-radial piston;
The 6-electronic pressure transmitter; The 7-computer.
The specific embodiment
For making the purpose, technical solutions and advantages of the present invention clearer; the below will carry out clear, complete description to technical scheme of the present invention; based on the specific embodiment among the present invention; those of ordinary skills are resulting all other embodiments under the prerequisite of not making creative work, all belong to the scope that the present invention protects.
At first, before the narration specific embodiment, in embodiment provided by the invention, regulation is along the direction of boring under the drill bit, and an end on close ground is the upper end, and an end of close drill bit is the lower end.
Embodiment one:
As depicted in figs. 1 and 2, the tapered stabilizer that provides in the present embodiment, comprise housing 1, upper mandrel 2 and lower mandrel 3, the inside of upper mandrel 2 is formed with upper high-pressure slurry chamber 21 along the axis direction of housing 1, the inside of lower mandrel 3 is formed with lower high-pressure slurry chamber 31 along the axis direction of housing 1, the upper end of the lower end of upper mandrel 2 and lower mandrel 3 is connected and fixed, and upper high-pressure slurry chamber 21 and 31 connections of lower high-pressure slurry chamber; Also comprise mud pressure variations device 4, mud pressure variations device 4 is comprised of mushroom head assembly 41 and centre bore 42, centre bore 42 is arranged on the top of mandrel 2, and the upper end diameter of centre bore 42 is greater than lower end diameter, and centre bore 42 is communicated with upper high-pressure slurry chamber 21; Mushroom head assembly 41 is arranged on the top of centre bore 42 and is fixed on the inwall of housing 1.
The mud pressure variations device 4 that it arranges by the place, top at upper mandrel 2, utilize slush pump to start and stop to drive mandrel 2 and lower mandrel 3 is subjected to displacement downwards, thereby change the distance between mushroom head assembly 41 and the centre bore 42, and then so that mud change through the area of passage of mushroom head assembly 41 with centre bore 42 places, so that mud pressure changes, and then realized the state of tapered stabilizer is judged, and when tapered stabilizer is in running order, mud is maximum with the area of passage at centre bore 42 places through mushroom head assembly 41, thereby effectively reduced the pressure that descends in working order tapered stabilizer to bear, guaranteed safe and reliable under tapered stabilizer in working order.
In the present embodiment, it is emphasized that, because when tapered stabilizer is in running order, to press close to mutually with the inwall of well by the radial piston 52 that arranges on it, thereby in drilling process, play the effect of hole trajectory control, position and the quantity of the radial piston 52 that therefore, arranges on it can play deciding factor to the control of well track.For this reason, be evenly equipped with at least three aerofoils 5 on the outer wall of preferred housing 1, and aerofoil 5 extends twist along the axis direction of housing 1, on each aerofoil 5 along being evenly equipped with at least four piston putting holes 51 on its spiral extension direction, and the quantity of the piston putting hole 51 that arranges on each aerofoil 5 is all identical, is placed with radial piston 52 in the piston putting hole 51; Axis direction along shell on the outer wall of lower mandrel 3 is socketed with at least four clinohedrals 32 successively, and the quantity of the radial piston 52 that arranges on the quantity of clinohedral 32 and each aerofoil 5 equates; The outer wall of clinohedral 32 is evenly equipped with at least three inclined plane parts 321, and the quantity of the inclined plane part 321 that arranges on each clinohedral 32 equates with the quantity of aerofoil 5; Radial piston 52 is corresponding one by one with inclined plane part 321, and the base abuts of radial piston 52 is on inclined plane part 321.
It is by uniform at least three spirality aerofoils 5 on the outer wall of housing 1, and at least four radial pistons 52 of each aerofoil 5 setting, utilize a plurality of radial pistons 52 from diverse location the inwall of well to be pressed close to, the outer wall that guarantees housing 1 all has radial piston 52 and the inwall of well to fit everywhere on one week, and guarantee that radial piston 52 is mutually corresponding, thereby guarantee the inwall stressed precision that evenly further improves hole trajectory control everywhere to well, guarantee drilling quality.
Further, for the ease of understanding, the below further is provided by structure and the course of work thereof of the tapered stabilizer that provides in the present embodiment.
Extremely shown in Figure 4 such as Fig. 2, be evenly equipped with at least three aerofoils 5 on the outer wall of housing 1, and aerofoil 5 extends twist along the axis direction of housing 1, on each aerofoil 5 along being evenly equipped with at least four piston putting holes 51 on its spiral extension direction, and the quantity of the piston putting hole 51 that arranges on each aerofoil 5 is all identical, is placed with radial piston 52 in the piston putting hole 51.
Be formed with Access Division 23 on the outer wall of upper mandrel 2, the below that is positioned at Access Division 23 on the outer wall of upper mandrel 2 is socketed with spring base 24, spring base 24 is slidingly matched with upper mandrel 2, and the inwall of the outer wall of spring base 24 and housing 1 is affixed, be provided with back-moving spring 22 between the top of the bottom of Access Division 23 and spring base 24, and back-moving spring 22 is socketed on the outer wall of mandrel 2.
Be socketed with successively cam body 33, at least four clinohedrals 32, dummy piston 35 and silently 36 on the outer wall of lower mandrel 3 from top to bottom.
Be formed with the control chute 39 of bending on the outer wall of cam body 33, be provided with cam pin 34 on the inwall of housing 1, the end of cam pin 34 stretches in the control chute 39 (as shown in Figure 4).
The quantity of the radial piston 52 that arranges on the quantity of clinohedral 32 and each aerofoil 5 equates, the outer wall of clinohedral 32 is evenly equipped with at least three inclined plane parts 321, and the quantity of the inclined plane part 321 that arranges on each clinohedral 32 equates with the quantity of aerofoil 5, radial piston 52 is corresponding one by one with inclined plane part 321, and the base abuts of radial piston 52 is on inclined plane part 321.
Dummy piston 35 and silently be formed with low pressure mud chamber 37 between 36 be provided with through hole 38 on the housing 1, and through hole 38 is at dummy piston 35 and silently between 36.
It in use, the lower end of housing 1 links to each other with drill bit, when drill bit creeps into downwards, ground slush pump starts, high-pressure slurry is fed through in the housing 1 by drilling rod, when high-pressure slurry enters into upper high-pressure slurry chamber 21 and lower high-pressure slurry chamber 31 when interior from the inside of housing 1, because upper high-pressure slurry chamber 21 reduces to some extent compared to the area of passage of housing 1, therefore meeting is so that upper mandrel 2 is subject to downward pressure P1, then high-pressure slurry enters in the drill bit via upper high-pressure slurry chamber 21 and lower high-pressure slurry chamber 31, then the fluid hole from the drill bit is discharged, thereby reach the cooling drill bit, lubricated drill bit, take away the effect of sandstone and the support borehole wall, thereby after flowing out in the mud drill bit, mud can form low pressure mud between tapered stabilizer and the borehole wall, and low pressure mud can enter in the low pressure mud chamber 37 by through hole 38, thereby so that dummy piston 35 is subject to pressure P2 upwards, when the pressure that the pressure that is subject to when upper mandrel 2 is subject to greater than dummy piston 35 and the elastic force of back-moving spring 22, upper mandrel 2 and lower mandrel 3 begin to move down.
When upper mandrel 2 and lower mandrel 3 were begun to move down by original position, the cam body 33 on the lower mandrel 3 also began to move down thereupon, also began to move down with the clinohedral 32 on the mandrel 3 at present thereupon, and its concrete motion process is:
When upper mandrel 2 and lower mandrel 3 are positioned at original position (upper limit position), cam pin 34 is positioned at the C1 place (as shown in Figure 4) of control chute 39, in this simultaneously, the bottom of radial piston 52 is positioned at the minimum point place of inclined plane part 321, the top of radial piston 52 is positioned at piston putting hole 51, be convenient to this moment upwards pull out of hole this duty trip-out duty.
When slush pump starts for the first time, upper mandrel 2 and lower mandrel 3 begin to move down, cam pin 34 is motionless simultaneously, and cam body 33 rotates with respect to cam pin 34, cam pin 34 slides into the B1 place (as shown in Figure 4) in the control chute 39, this moment, cam pin 34 leant with control chute 39, cam body 33 no longer moves down, clinohedral 32 also no longer moves down simultaneously, in this simultaneously, the bottom of radial piston 52 moves to centre one desired location of inclined plane part 321, and it is concordant with the oral area of piston putting hole 51 that radial piston 52 protrudes outwardly to the top of radial piston 52, and namely the top of radial piston 52 is mutually concordant with aerofoil 5.
Subsequently, slush pump stops for the first time, pressure drop in the high-pressure slurry chamber, under the effect of back-moving spring 22, upper mandrel 2 and lower mandrel 3 move up, at this moment, cam pin 34 slides into the C2 place (as shown in Figure 4) in the control chute 39, and in this simultaneously, the bottom of radial piston 52 moves to the minimum point place of inclined plane part 321, the top of radial piston 52 is positioned at piston putting hole 51, namely recovers above-mentioned trip-out duty.
When slush pump started for the second time, upper mandrel 2 and lower mandrel 3 began to be moved downward to the lower position, and cam pin 34 is motionless simultaneously, and cam body 33 rotates with respect to cam pin 34, and cam pin 34 slides into first the B in the control chute 39
2The place slides into the A in the control chute 39 again
2Place's (as shown in Figure 4), this moment, cam pin 34 leant with control chute 39, cam body 33 no longer moves down (namely arriving the lower position), clinohedral 32 also no longer moves down simultaneously, in this simultaneously, the bottom of radial piston 52 moves to the peak place of inclined plane part 321, radial piston 52 protrudes outwardly to extreme position, it is the outside that the top of radial piston 52 is positioned at piston putting hole 51, the top of radial piston 52 is higher than aerofoil 5, utilizes radial piston 52 and the inwall of well to press close to mutually, thereby plays the effect of hole trajectory control in drilling process, only however termination of pumping just can creep into always, this state is the drilling well duty.
Subsequently, slush pump stops for the second time, pressure drop in the high-pressure slurry chamber, under the effect of back-moving spring 22, upper mandrel 2 and lower mandrel 3 move up, the bottom of radial piston 52 moves to the minimum point place of inclined plane part 321 again, and the top of radial piston 52 is positioned at piston putting hole 51, returns to the trip-out duty.
Thereby the startup by slush pump and stopping just can be controlled tapered stabilizer, thereby make it be in different duties.
Synchronous, the specific works engineering of mushroom head assembly 41 and centre bore 42 is: when upper mandrel 2 and lower mandrel 3 are positioned at original position, distance between centre bore 42 and the mushroom head assembly 41 is minimum, start slush pump this moment, when mud flow to centre bore 42 from mushroom head assembly 41, its area of passage is minimum, so mud pressure is relatively the highest, can judge that the bottom of radial piston 52 is positioned at the minimum point place of inclined plane part 321 this moment, the top of radial piston 52 is positioned at piston putting hole 51, and namely tapered stabilizer is in the trip-out duty.
When slush pump starts for the first time, upper mandrel 2 and lower mandrel 3 begin to move down, distance between centre bore 42 and the mushroom head assembly 41 becomes large gradually, when this moment, mud flow to centre bore 42 from mushroom head assembly 41, it is large that its area of passage becomes gradually, so the mud pressure relative reduce is to certain value, can judge that the bottom of radial piston 52 moves to the centre position of inclined plane part 321 this moment, it is concordant with the oral area of piston putting hole 51 that radial piston 52 protrudes outwardly to the top of radial piston 52, and namely the top of radial piston 52 is mutually concordant with aerofoil 5.
When slush pump starts for the second time, upper mandrel 2 and lower mandrel 3 are moved downward to the lower position, distance between centre bore 42 and the mushroom head assembly 41 is maximum, when this moment, mud flow to centre bore 42 from mushroom head assembly 41, its area of passage is maximum, so mud pressure is relatively minimum, can judge that the bottom of radial piston 52 moves to the peak place of inclined plane part 321 this moment, radial piston 52 protrudes outwardly to extreme position, it is the outside that the top of radial piston 52 is positioned at piston putting hole 51, the top of radial piston 52 is higher than aerofoil 5, and namely tapered stabilizer is in the drilling well duty.
In sum, when tapered stabilizer is in running order, mud is maximum with the area of passage at centre bore 42 places through mushroom head assembly 41, thereby effectively reduced the pressure that descends in working order tapered stabilizer to bear, and has guaranteed safe and reliable under tapered stabilizer in working order.
In the present embodiment, as shown in Figures 2 and 3, preferred, the quantity of aerofoil 5 is three, and the quantity of the inclined plane part 321 that arranges on each inclined plane part 321 on the other side also is three.
In the present embodiment, preferred as shown in Figure 2, be evenly equipped with five piston putting holes 51 on each aerofoil 5, the quantity of clinohedral 32 on the other side is five.
In the present embodiment, because the housing 1 interior numerous devices of placement that need, and the housing 1 whole long processing that also is unfavorable for, therefore, preferably, housing 1 comprises upper body 11, central enclosure 12 and lower case 13, and the top of the bottom of upper body 11 and central enclosure 12 is affixed, and the top of the bottom of central enclosure 12 and lower case 13 is affixed.Because housing 1 adopts split-type structural, formed by upper body 11, central enclosure 12 and lower case 13, thereby be convenient to processing, be conducive to guarantee the machining accuracy of housing 1, be convenient to simultaneously at housing 1 interior installing component, and can effectively reduce production costs.
Further preferred, the bottom of upper body 11 is threaded with the top of central enclosure 12, and the top of the bottom of central enclosure 12 and lower case 13 is threaded.Thereby more be convenient to install, and the overall construction intensity that can guarantee to install back casing 1.
In the present embodiment, for the ease of installation and the overall package of all parts in housing 1, therefore upper mandrel 2 and mushroom head assembly 41 can be placed in the upper body 11, and aerofoil 5 can be arranged on the outer wall of central enclosure 12.
In the present embodiment, for so that radial piston 52 clinohedral 32 lay more firm, can not break away from the inefficacy that causes tapered stabilizer from clinohedral 32 because of radial piston 52, for this reason, can be provided with the T-shaped groove 322(that is connected for the bottom with radial piston 52 as shown in Figure 3 at inclined plane part 321) or dovetail groove; Utilize T-shaped groove 322 or dovetail groove that the bottom of inclined plane part 321 with radial piston 52 closely is connected, thereby prevent that radial piston 52 breaks away from from inclined plane part 321; Guarantee the normal operation of tapered stabilizer.
Embodiment two:
Because tapered stabilizer when judging its duty, is normally observed the variation of the number of degrees of slush pump pressure gauge.But because tapered stabilizer carries out operation in the position of several kms of below ground usually, the pressure conduction in the tapered stabilizer can occur to decay significantly during to ground.For example, when the pressure of mud about 2MPa changed, its pressure signal all can be so that the terrestrial operation personnel can't accurately read manometric pressure variation in the strong vibration effect of uploading decay and rig floor.Therefore in order directly to observe on ground the variation of the pressure meter number of degrees, often need slush pump to strengthen the pressure that mud injects, thus the impact that the offset pressure decay causes.So, mud pressure tends to exceed drilling well and normally uses a lot of times of mud pressures in the tapered stabilizer, and then so that tapered stabilizer and well system bear very large mud pressure, also can greatly improve the requirement of the structural strength of tapered stabilizer and well system.
For this reason, as shown in Figure 5, the tapered stabilizer system that present embodiment provides comprises the tapered stabilizer in computer 7 and above-described embodiment one; Be provided with electronic pressure transmitter 6 on the mushroom head assembly 41, electronic pressure transmitter 6 links to each other with computer 7 by sender unit.
Its utilization arranges electronic pressure transmitter 6 at mushroom head assembly 41, can read accurately the minor variations of mud pressure, and pass through the sender unit fast transport to computer 7, and by computer 7 data decodes and show, the accuracy of its data is high, and can effectively reduce the mud pressure of tapered stabilizer inside and well system, thereby so that the safety of tapered stabilizer and well system is higher, also can reduce simultaneously the power of slush pump, reduce energy consumption.
In the present embodiment, preferred, sender unit is impulse sender.But utilize the efficiency of transmission of impulse sender Effective Raise pressure signal, reduce the loss of pressure signal in transmission course, further improve accuracy, the reliability of data.
It should be noted that at last: above embodiment and embodiment only in order to technical scheme of the present invention to be described, are not intended to limit; Although with reference to aforementioned embodiments and embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned embodiments or embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence disengaging embodiment of the present invention of appropriate technical solution or the spirit and scope of embodiment technical scheme.
Claims (10)
1. tapered stabilizer, it is characterized in that, comprise housing, upper mandrel and lower mandrel, the inside of described upper mandrel is formed with upper high-pressure slurry chamber along the axis direction of described housing, the inside of described lower mandrel is formed with lower high-pressure slurry chamber along the axis direction of described housing, the lower end of described upper mandrel and the upper end of described lower mandrel are connected and fixed, and described upper high-pressure slurry chamber and the connection of described lower high-pressure slurry chamber;
Also comprise the mud pressure variations device, described mud pressure variations device is comprised of mushroom head assembly and centre bore, described centre bore is arranged on the upper end of described upper mandrel, and the upper end diameter of described centre bore is greater than lower end diameter, and described centre bore is communicated with described upper high-pressure slurry chamber; Described mushroom head assembly is arranged on the top of described centre bore and is fixed on the inwall of described housing.
2. tapered stabilizer according to claim 1, it is characterized in that, be evenly equipped with at least three aerofoils on the outer wall of described housing, and described aerofoil extends twist along the axis direction of described housing, on each described aerofoil along being evenly equipped with at least four piston putting holes on its spiral extension direction, and the quantity of the described piston putting hole that arranges on each described aerofoil is all identical, is placed with radial piston in the described piston putting hole;
Axis direction along described shell on the outer wall of described lower mandrel is socketed with at least four clinohedrals successively, and the quantity of the described radial piston that arranges on the quantity of described clinohedral and each described aerofoil equates;
The outer wall of described clinohedral is evenly equipped with at least three inclined plane parts, and the quantity of the described inclined plane part that arranges on each described clinohedral equates with the quantity of described aerofoil;
Described radial piston is corresponding one by one with described inclined plane part, and the base abuts of described radial piston is on described inclined plane part.
3. tapered stabilizer according to claim 2 is characterized in that, the quantity of described aerofoil is three, and the quantity of the described inclined plane part that arranges on each described inclined plane part is three.
4. tapered stabilizer according to claim 2 is characterized in that, is evenly equipped with five described piston putting holes on each described aerofoil, and the quantity of described clinohedral is five.
5. according to claim 1 to 4 each described tapered stabilizers, it is characterized in that, described housing comprises upper body, central enclosure and lower case, the bottom of described upper body and the top of described central enclosure are affixed, and the bottom of described central enclosure and the top of described lower case are affixed.
6. tapered stabilizer according to claim 5 is characterized in that, the bottom of described upper body is threaded with the top of described central enclosure, and the bottom of described central enclosure and the top of described lower case are threaded.
7. tapered stabilizer according to claim 5 is characterized in that, described upper mandrel and described mushroom head assembly are placed in the described upper body, and described aerofoil is arranged on the outer wall of described central enclosure.
8. according to claim 2 to 4 each described tapered stabilizers, it is characterized in that, be provided with the T-shaped groove or the dovetail groove that are connected for the bottom with described radial piston on the described inclined plane part.
9. a tapered stabilizer system is characterized in that, comprises computer and the claims 1 to 7 each described tapered stabilizer;
Be provided with electronic pressure transmitter on the described mushroom head assembly, described electronic pressure transmitter links to each other with described computer by sender unit.
10. tapered stabilizer according to claim 9 system, described sender unit is impulse sender.
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| CN201210583186.9A CN103015892B (en) | 2012-12-27 | 2012-12-27 | Tapered stabilizer and system thereof |
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