CN1711404B - Roller assembly and rotary roller reamer using same - Google Patents
Roller assembly and rotary roller reamer using same Download PDFInfo
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- CN1711404B CN1711404B CN200380102814.6A CN200380102814A CN1711404B CN 1711404 B CN1711404 B CN 1711404B CN 200380102814 A CN200380102814 A CN 200380102814A CN 1711404 B CN1711404 B CN 1711404B
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- depression
- reamer
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Abstract
The invention relates to a roller assembly (20) for a rotary roller reamer (10). The roller assembly (20) includes a roller pin (22) and a crushing roller (24). The crushing roller (24) is arranged to be mounted on the rolle r pin (22) and to rotate thereabout. The roller assembly (20) is connected together so as to form a single cartridge which can be inserted into a pocke t (18) of the rotary roller reamer (10) and secured thereto using a single fastener device.
Description
Technical field
The present invention relates to a kind of improved rotary roller reamer and to the improvement of its various elements.
Background technology
In drilling operation, drill bit is worn, and therefore the size of boring will change in time.Size in order to ensure boring keeps accurately rotary roller reamer being positioned on the drill string, and being used for boring is expanded to the size of needs.Rotary roller reamer is included in and makes drill bit can use the long time cycle on the drill string and needn't change, and this has prevented expensive downtime.
The working environment of rotary roller reamer is very abominable.As a result, the element of rotary roller reamer needs often maintenance, maintenance or changes.Because it is huge to shut down the maintenance cost, so the working life that preferably prolongs rotary roller reamer, thereby reduces because the downtime of maintenance.Preferably also can make the roll assembly that uses in the rotary roller reamer from the reamer body, take out and to change fast and easily in their depressions separately.
The present invention will provide a kind of improved rotary roller reamer and various element thereof.
The present invention also will provide a kind of pressure-equalizing device that is used for equipment.
Summary of the invention
According to a first aspect of the invention, provide a kind of rotary roller reamer, comprise having the reamer body that at least one is used to receive roll assembly, wherein said roll assembly comprises a plurality of elements that can insert the single integration member in the described depression that are joined together to form.
Preferably, described integration member is fixed in the described depression by single fastening apparatus.
According to a second aspect of the invention, a roll assembly that is used for rotary roller reamer is provided, the breaker roll that described roll assembly comprises the roller pin and is arranged to be installed on the described roller pin and rotates around described roller pin, wherein roll assembly links together so that form single integration member in the depression that can be inserted into rotary roller reamer.
Preferably, this integration member is arranged to be fixed to depression by single fastening apparatus.
Preferably, described roll assembly further comprises and is used for described roller pin is remained on first holding device in the described depression, described first holding device comprises first connector, this first connector is arranged to be connected to the roller pin, so that roller pin, breaker roll and first connector form the described single integration member in the depression that can be inserted into rotary roller reamer.
Preferably, first connector has the first surface that first end with the roller pin is complementary, with the second surface that is arranged to the engagement of the sidewall of described depression, the described sidewall of described depression and the described second surface of described first connector are configured to, when with described fastening apparatus roll assembly being fixed to described depression, first connector is pulled in the depression.
Preferably, roll assembly further comprises second holding device.
Preferably, between first end of roller pin and breaker roll, provide first thrust ring, and between second end of breaker roll and described second holding device, provide second thrust ring.Preferably, first and second thrust rings are to sacrifice thrust ring, are arranged to regulate the thrust load that is applied to breaker roll in the rotary roller reamer use.
Preferably, the first end complementation of the first surface of first connector and roller pin.Preferably, first end of roller pin is formed with the head of expansion.
Preferably, the roller pin comprises and wherein is formed with central longitudinal with second end that leads to the roller pin bar to blind hole.This hole forms lubricant reservoir.The lateral opening that is substantially perpendicular to it and extends is led in this hole, and leads to elementary lubricant dispense groove.Preferably, elementary lubricant dispense groove is basically along the longitudinal extension of roller pin, and can adopt various structures, for example, and " 8 font " structure.
In roller pin rotary course, sliding agent can be provided to the elementary lubricant dispense groove from the storage pond by lateral opening at breaker roll.Along with breaker roll rotates around the roller pin, lubricant dispense is to the bar of roller pin.
Preferably, between the bar of breaker roll and roller pin, provide sealing device, leak to prevent sliding agent.
Preferably, in the hole of roller pin, provide pressure-equalizing device.Pressure between the sliding agent that this pressure-equalizing device is arranged to comprise in the hole of drilling slurry around the body of balanced rotation roller reamer and roller pin.Pressure-equalizing device can comprise strainer, for example, and sintered metal filter.
In a preferred embodiment, first connector forms the truncated cone with bottom and top.Preferably, the center longitudinal axis that has with respect to it of the truncated cone is less than or equal to 7 ° angle.Preferably, this angle is about 3 °.The bottom of first connector is arranged to be located on the position of the topmost in the depression.The bottom has the external diameter less than the external diameter at top.
Preferably, the bottom of first connector has the bottom surface that forms with the engagement of the mating part of depression.Preferably, the mating part of depression comprises the cylinder with the screwed hole of centre that can be screwed into securing member.
Preferably, first connector comprises that the securing member of sidewall that leads to first connector and the bottom of also leading to first connector receives cavity.This cavity is constructed such that securing member can pass the opening on the sidewall and is positioned at wherein.In this position, the front end of securing member extends through the opening in the bottom.By this way, the front end of securing member can be screwed into the screwed hole that forms in the cylinder of depression.
Preferably, first connector also comprises the long spiro nail mouth of connecting trough that is formed on its sidewall.The screw mouth of connecting trough is configured to receive the head of screw of the head of the expansion that is connected to the roller pin.
Preferably, form the hole at the top of first connector, and this hole is arranged such that instrument can therefrom pass, thereby securing member can be screwed in the hole of cylinder.
In a kind of particularly preferred form, this securing member is a socket head fastener, and this socket head fastener is arranged to be positioned at the top that securing member receives cavity.The top of cavity is configured to, and when in the cylinder that securing member is screwed into depression, first connector can be pulled into depression, and when back-outing securing member, first connector can be proposed depression.
Preferably, second holding device comprises second connector that forms the truncated cone.Preferably, this truncated cone has and is less than or equal to 7 ° angle with respect to its center longitudinal axis.Preferably about 3 ° of angle.This second connector has bottom, top and sidewall.This bottom has the external diameter bigger than top external diameter, and is arranged to be positioned in the depression on the position of below.
In second connector, be formed with the hole of the vertical central axis that is substantially perpendicular to second connector.The hole is arranged to receive second end of roller pin.Preferably, the size in this hole can be slidingly matched with second end of roller pin.
Preferably, also on the sidewall of second connector, provide an aperture.This aperture is arranged to help to be included in pressure between the mud that surrounds roll assembly in sliding agent in the lubricant reservoir and the use for balanced.
Projection stretches out from the sidewall of second connector.Projection is arranged to be meshed with the groove of complementary shape in the part that is formed on depression.
According to a preferred embodiment of the present invention, each depression of rotary roller reamer comprises inferior pyramidal slot, elementary cavity, secondary cavity and upper conical slot.Preferably, this upper conical slot is positioned at the last bore ends of rotary roller reamer, and inferior pyramidal slot preferred orientation is in the following bore ends of rotary roller reamer.
Upper conical slot is arranged to receive first holding device.This upper conical slot comprises and has the vertical axis that shows slot relatively that the axle of the longitudinal axis of rotary roller reamer (that is, perpendicular to) is less than or equal to semicircle truncated cone-shaped of 7 ° of angles.Preferably about 3 ° of this angle.This slot is taper, thus the part than minor diameter formation depression bottom surface of slot.What be tangential to conical seat is the inlet gathering sill with side of the bullet that is used to mate conical seat.This seat extends about 270 ° of arc length, and the remainder of arc length opens wide to secondary cavity.This seat preferably extends greater than 180 ° of arc length.
Cylinder is located substantially on the center of upper conical slot, and the securing member preferred arrangement of first connector is fixed in this cylinder.
Preferably, elementary cavity (or roller cavity) is constructed to the breaker roll that is installed on the roller pin provides operating clearance.Elementary cavity is compared the formation constriction with the external diameter of reamer body.This causes elementary cavity to have in the degree of depth perpendicular to the y direction of reamer body, and this degree of depth is less than the degree of depth of upper and lower taper slot.
Preferably, it is trapezoidal that secondary cavity forms the side that narrows down in the bottom surface of cavity.Secondary cavity is formed for the seat of the head of roller pin.
Preferably, the inferior pyramidal slot is arranged to receive second holding device.The inferior pyramidal slot comprises with respect to the axle of the longitudinal axis of rotary roller reamer (that is, perpendicular to) of the vertical axis of slot and is less than or equal to semicircle truncated cone-shaped of 7 ° of angles.Preferably about 3 ° of angle.Slot is taper, thus the part than major diameter formation depression bottom surface of slot.
On the position of the sidewall sections of inferior pyramidal slot, form the groove or the convex of the fixedly projection that is arranged to receive second connector.This groove or convex are preferably half moon-shaped basically.
According to a third aspect of the invention we, a kind of breaker roll that is used for rotary roller reamer is provided, described breaker roll comprises middle body and first and second part, and middle body has the external diameter greater than the external diameter of first and second ends, and wherein central authorities, first and second parts are covered with projection arrangement.
Preferably, projection arrangement is arranged in middle body, so as projection arrangement with by the contact zone overlaid of the part of the drill hole wall of reaming.Projection arrangement can be arranged at least one helix around the middle body of breaker roll.Helix is preferably left-handed twist.This layout plays the effect that reduces the thrust load on the vertical plane in the breaker roll use.
Preferably, each projection arrangement comprises the button that is installed in the hole that forms in the breaker roll.The preferably semicircular tungsten carbide buttons of button.
According to a preferred form, the button on the middle body is arranged to four rows, eight of every rows, and be arranged on left-handed 3.31699 " on the pitch helix.Every row is separated with 90 ° angular displacement, and the starting point of every row begins with the incremental steps that equals 0.125 * 1/9 helix datum curve length.1/9 of each projection arrangement interval helical length.
Preferably, between the row of each spiral spacer, be the groove that is created on the helix reference path identical with projection arrangement.Groove is arranged to provide the mud circulation roller of increase, and increases the gap that the residue from reamer passes through.
According to a forth aspect of the invention, a kind of rotary roller reamer is provided, comprise and have the reamer body that at least one is used to receive the depression of roll assembly, described roll assembly comprises pin, be arranged to be installed in the sealing device between breaker roll, pin and the breaker roll on the described pin and be used for pin is remained on the device of described depression, wherein pin comprises having the hole that is positioned at pressure-equalizing device wherein, and pressure-equalizing device is used for the pressure on the balanced sealing device basically.
Preferably, pressure-equalizing device is used for the drilling slurry around the balanced use rotary roller reamer body and is included in pressure between the sliding agent in the hole of roller pin.
Preferably, breaker roll is arranged to rotate around the roller pin.
Pressure-equalizing device can comprise strainer, for example, and sintered metal filter.
According to a fifth aspect of the invention, a kind of rotary roller reamer is provided, comprise and have the reamer body that at least one is used to receive the depression of roll assembly, described roll assembly comprises roller pin and the breaker roll that is arranged to be installed on the described roller pin, wherein the reamer body has away from elementary external diameter in the zone of breaker roll and the secondary external diameter in the zone of contiguous breaker roll, wherein compare with elementary external diameter, secondary external diameter reduces, so that stress release is provided.
According to a sixth aspect of the invention, a kind of pressure-equalizing device that is used for equipment is provided, described equipment has the sealing device that the sliding agent between at least one first and second member that are used to seal described equipment is supplied with, described pressure-equalizing device is arranged and is installed on the described equipment, and be arranged to make it to be used for the pressure that the balanced lubrication agent is applied to first side of described at least one sealing device, with the fluid pressure on second side that is applied at least one sealing device.
Description of drawings
Below with reference to accompanying drawing, only, embodiments of the invention are described in illustrational mode, wherein:
Fig. 1 is the sectional view of rotary roller reamer according to an embodiment of the invention;
Figure 1A is the zoomed-in view of the middle body (that is, depression and roll assembly) of the rotary roller reamer shown in Fig. 1;
Fig. 2 is the partial assembly drawing of adjacent with the reamer body with a plurality of depressions according to one embodiment of present invention roll assembly;
Fig. 3 is mounted in the central longitudinal sectional drawing of roll assembly shown in Fig. 2 in the depression of rotation roller;
Fig. 3 A is the part sectioned view along an end of the roll assembly of the line of a center line that departs from rotary roller reamer;
Fig. 4 is the longitudinal sectional drawing of the depression of the rotary roller reamer shown in Fig. 3;
Fig. 5 to 8 is phantom drawings of first holding device according to an embodiment of the invention;
Fig. 9 to 11 is phantom drawings of second holding device according to an embodiment of the invention;
Figure 12 is the lateral view of breaker roll according to an embodiment of the invention;
Figure 13 is the longitudinal sectional drawing of the breaker roll shown in Figure 12;
Figure 14 is the end-view of the breaker roll shown in Figure 12;
Figure 15 to 17 is views of roller pin according to an embodiment of the invention;
Figure 18 shows the sectional drawing that first holding device is connected to the attachment screw that extends from the enlarged head of roller pin;
Figure 19 shows to keep connector to be inserted into sectional drawing in the attachment screw notch of first holding device;
Figure 20 shows roller integration member (that is the roll assembly that, assembles) is inserted into part sectioned view in the depression of rotary roller reamer;
Figure 21 is the phantom drawing in stabilized zone shown in Figure 1A;
Figure 22 is the front elevation drawing in stabilized zone shown in Figure 21; With
Figure 23 is the lateral view in stabilized zone shown in Figure 21.
The specific embodiment
Fig. 1 and 1A show rotary roller reamer 10 according to an exemplary embodiment of the present invention.Rotary roller reamer 10 has male end 12 and female end 14.Rotary roller reamer 10 is arranged to be connected to the drill string (not shown).As shown in this embodiment, male end 12 is positioned at the following nose end of rotary roller reamer 10, and female end 14 is positioned at the last nose end of rotary roller reamer 10.Obviously the structure or the character that should be appreciated that each end of rotary roller reamer 10 can change.
Fig. 2 shows the depression 18 that forms better in reamer body 16.This figure also shows cut-out or the mud road 17 that is formed between the adjacent depression 18.
Fig. 2 shows the roll assembly 20 under the decomposition condition.Roll assembly 20 comprises roller pin 22, breaker roll 24, first holding device 26, second holding device 28, keeps screw 29, first thrust ring 30, second thrust ring 32, pair of seal members 34a and 34b, pressure-equalizing device 36, securing member 38, a pair of self-lock pin 38a, attachment screw 70 and keeps connector 72.
When the element of roll assembly 20 was fitted together, they formed single integration member, and this integration member can utilize securing member 38 to be fixed in the depression 18 of rotary roller reamer 10.In use, breaker roll 24 is arranged to around roller pin 22 rotation, so that utilize its to enlarge the sidewall of the boring that rotary roller reamer 10 passes.Illustrate in greater detail each element and the performance that is formed on the depression 18 in the reamer body 16 of roll assembly 20 now.
Fig. 3,3A and 4 show the structure of each depression 18 and roll assembly 20 best in its engagement in depression 18 separately.Each depression 18 comprises inferior pyramidal slot 40, elementary cavity 42, secondary cavity 44 and upper conical slot 46.Inferior pyramidal slot 40 is positioned at the following nose end of rotary roller reamer 10, and upper conical slot 46 is positioned at the last nose end of rotary roller reamer 10.Arrange inferior pyramidal slot 40 receiving second holding device 28, and arrange that upper conical slot 46 is to receive first holding device 26.Arrange that elementary cavity 42 is to receive roller pin 22 and the breaker roll 24 that is installed on the roller pin.Design the size and the structure of elementary cavity 42, so that the operating clearance of the breaker roll 24 in rotary roller reamer 10 uses to be provided.The head 22a that secondary cavity 44 is a roller pin 22 forms a seat.
Inferior pyramidal slot 40 comprises that has the truncated cone-shaped seat of semicircle that vertical axis with respect to depression 18 axle of the longitudinal axis of rotary roller reamer 10 (that is, perpendicular to) is less than or equal to 7 ° of angles.As shown in the figure, this angle is about 3 °.The diameter of inferior pyramidal slot 40 diminishes gradually, so as slot 40 form the part of the bottom surface 18a of depression 18 than major diameter.That be tangential to conical seat is the inlet gathering sill 40a with side that the taper with conical seat is complementary.
Four carbide abaculus 18b are installed in the part of bottom surface 18a of inferior pyramidal slot 40, so that be positioned at the head 22a below of roller pin 22.Provide carbide abaculus 18b to prevent in rotary roller reamer 10 uses because the motion of head 22a causes the bottom surface 18a wearing and tearing of depression 18.
As clear illustrating among Fig. 4, to compare with the external diameter of reamer body 16, elementary cavity 42 forms constriction.In addition, the bottom surface 18a of elementary cavity 42 progressively reduces towards the direction of reamer body 16 center lines.Therefore, elementary cavity 42 has the degree of depth of the working clearance that is enough to provide breaker roll 24 on perpendicular to y direction.In addition, compare with the external diameter of reamer body 16 in the zone that is close to lower and upper taper slot 40,46, reamer body 16 reduces or " constriction " at this regional external diameter.This constriction of reamer body 16 is constructed the stress release in this zone that depression 18 is provided.
Upper conical slot 46 comprises having the truncated cone-shaped seat of semicircle that is less than or equal to 7 ° of angles with respect to the vertical axis of slot 46.As shown in the figure, this angle is about 3 °.The diameter of last slot 46 diminishes gradually, so as slot 46 form the part of the bottom surface 18a of depression 18 than minor diameter.This seat extends about 270 ° of arc length, and the remainder of arc length leads to secondary cavity 44.Column 52 is positioned at the center of upper conical slot 46 substantially.Column 52 comprises and forms screw thread so that can receive the hole 54 of securing member 38.As selection, as shown in the figure, screw thread abaculus 54a can be positioned in the hole 54.
Fig. 5 to 8 shows first holding device 26.First holding device 26 forms first connector 26, and is arranged to be received in the upper conical slot 46.First connector 26 forms the truncated cone.The center longitudinal axis that this truncated cone has with respect to it is less than or equal to 7 ° angle, and comprises bottom 26a and top 26b.As shown in the figure, this truncated cone has about 3 ° angle.Bottom 26a is arranged to be positioned at the foot of inferior pyramidal slot 46.Bottom 26a has the external diameter less than the external diameter of top 26b.The bottom surface of bottom 26a forms the shape that is meshed with the bottom surface 18a of depression 18 in this zone of upper conical slot 46.More particularly, the shape of bottom 26a formation makes it to mate with column 52.
Form a pair of hole that is arranged to be received from lock pin 38a at the top 26b of first connector 26.Self-lock pin 38a is configured to that securing member is suitably located and be locked in to securing member 38 and receives in the cavity 26c.
The sidewall 26d of first connector 26 also comprises a microscler attachment screw notch 26f, and this attachment screw notch 26f can be connected to the attachment screw 70 that stretches out from the enlarged head 22a of roller pin 22 with first connector 26.Attachment screw notch 26f comprises the screw thread top 26f ' that is arranged to receive screw thread maintenance connector 72 (Figure 19).Before receiving maintenance connector 72, the size that screw thread top 26f ' forms can make the head 70a of attachment screw 70 therefrom pass.By this way, the head 70a of attachment screw 70 can be inserted among the attachment screw notch 26f, the bar portion of screw 70 can move along the length of notch 26f then.Being connected and illustrating in greater detail afterwards between screw 70 and first connector 26.
As illustrating best among Fig. 3, securing member 38 is socket head fastener.The header arrangement of securing member 38 becomes to be positioned at the top of cavity 26c, thereby when securing member 38 is screwed into column 52, first holding device 26 can be pulled in the inferior pyramidal slot 46, and when back-outing securing member 38, first holding device 26 can be lifted out upper conical slot 46.The shape of the sidewall structure of inferior pyramidal slot 46 and the head 22a of roller pin 22 helps this action of first holding device 26.When first holding device 26 (first connector 26) when being connected to roller pin 22, the motion of the upper conical slot 46 of first connector, 26 turnover causes the motion of whole roller integration member 20 turnover depressions 18.
Fig. 9 to 11 shows second holding device 28.Second holding device 28 or second connector form the truncated cone.This truncated cone has and is less than or equal to 7 ° angle with respect to its center longitudinal axis.As shown in the figure, this angle is about 3 °.Second connector 28 has bottom 28b, top 28c and sidewall 28d.Bottom 28b has the external diameter bigger than top 28c, and is arranged to be positioned at the foot in the upper conical slot 40.Planar section at the sidewall 28d of second connector 28 is formed with a hole 28e.Hole 28e is basically perpendicular to its center longitudinal axis and extends.Hole 28e is arranged to receive the second end 22b of roller pin 22.The size of hole 28e makes it to be slidingly matched with the second end 22b of roller pin 22.
Bottom 28b at second connector 28 is formed with screwed hole 28f.Screwed hole 28f is arranged to receive the second end 22b with roller pin 22 and is positioned at maintenance screw 29 in second connector 28.Keep the screw 29 and the engagement of roller pin 22 to illustrate in greater detail below.
In the sidewall 28d of second connector 28, be formed with aperture 28j.The function of aperture 28j will be in following explanation.
As mentioned above, second connector 28 has the projection 28k that is formed on its underpart.Projection 28k is arranged to be meshed with the fixed groove 40b of formation in the inferior pyramidal slot 40.This engagement is used for better roll assembly 20 being remained on depression 18.
Figure 12 to 14 shows breaker roll 24.Breaker roll 24 is formed the hollow circular cylinder member with centre bore, and the size of this centre bore can receive the bar portion of roller pin 22.Breaker roll 24 has the diameter parts that reduces that is used for elementary engagement between breaker roll 24 and borehole wall at every end.Secondary engagement diameter is formed between the elementary mate, and a plurality of buttons 60 (not shown among Figure 12 to 14) that distributing.The preferably semicircular tungsten carbide buttons of button 60, each tungsten carbide buttons is installed in the hole 62.According to a preferred embodiment, carbide buttons 60 is arranged to four lines, eight of every row, and be arranged on left-handed 3.31699 " on the pitch helix.Every row is separated with 90 ° angular displacement, and the starting point of every row begins with the incremental steps that equals 0.125 * 1/9 helix datum curve length.Each button 60 is 1/9 helical curve length at interval.
Those skilled in the art should be appreciated that the above-mentioned layout of button 60 provides very effectively using of carbonization field button on the breaker roll 24, thereby significantly reduce the use of carbide.Expect that also the minimizing of carbide consumption can reduce the torque loads on the drill string.Should further be understood that, also can use the arrangement form of other carbide buttons on the breaker roll.Preferably arrange carbide buttons like this, make in use them that covering fully to the extended wall part of well or boring can be provided.That is to say the extended part overlaid of the contact zone of each carbide buttons and boring.
Between the row of each pitch of button is groove 64.Four grooves 64 are arranged, and they generate on the helix reference path identical with hole 62.Arrange groove 64 so that the slurry flows that increases is crossed breaker roll 24, and increase the gap that to pass through from the crushing residua of rotary roller reamer 10.
The elementary engagement diameter of respectively holding 24a, 24b to comprise at breaker roll 24 makes rotary roller reamer 10 can two-wayly use (that is, using in hole and the following hole) thereon.In each elementary diameter, have seven and be used to embed the hole 62a that strengthens domed tungsten carbide buttons 60a.Hole 62a is equally spaced, and on circumference is drilled in surface perpendicular to the roller central axis.
As shown in Figure 12, on each elementary engagement diameter, be formed with the enhancing hole 62b that brill leads to centre bore thoroughly.Each hole 62b is processed with internal thread, and is arranged to receive pressure plug 63.Each hole 62b has the dual-use function of lubrication oil inlet and Butterworth Hatch.The use of pressure plug 63 will illustrate in greater detail afterwards.
As shown in Figure 13, be formed with pair of seal members and keep groove 66 in the hole wall of the center of breaker roll 24, this maintenance groove is arranged to receive corresponding seal 34a, 34b.As shown in the figure, seal 34a, 34b are simple O shape rings.But, also can use the seal of other type.
As shown in Figure 13, has the cannelure of enhancing 24c in the centre at the two ends in the hole of breaker roll 24.Each groove 24c is arranged to receive stabilized zone 75.As illustrating better among Figure 21, each stabilized zone 75 is bands that disconnect at an A, so that provide the gap between corresponding end 75a, the 75b of band.End 75a, 75b stops with about 45 ° angle (seeing Figure 23).Can suspect with other angle and stop.
The size that designs each stabilized zone 75 to be providing the minimum loose fit around the bar of roller pin 22, and floats in the groove 24c of correspondence.Therefore, stabilized zone 75 can be rotated with roller pin 22, or rotates with breaker roll 24.
Preferably, this stabilized zone 75 is with having the material manufacturing of rational hardness with relative low friction factor.This material can be from E.I.Du Pont Company's manufacturing, with Teflon (TEFLON)
A kind of fluoropolymer polymer of selecting in the polytetrafluoroethylene (PTFE) series that trade mark is sold on market.But, be more preferably, by adding the filler-reinforced this material such as glass, bronze or nickel.The PTFE that adds bronze is optimal material.
With this form, stabilized zone 75 will help roller pin 22 to rotate around its longitudinal axis with along its whole length basicly stablely.In this respect, in some cases, end-to-end the beating of seal 34a, 34b possibility pair roller pin 22 is responsive, and for example, what the surge of the general reasonable intensity that is subjected to owing to roll assembly 20 in operating process caused beats.Therefore, increase the quiet run that the stabilized zone 75 of using this general type helps roll assembly 20.
Figure 15 to 18 shows roller pin 22.Roller pin 22 comprises the hole 22c of longitudinal center (as illustrating best in Fig. 3 and 15) that leads to lower end 22b.Hole 22c in the bar of roller pin 22 forms lubricant reservoir.Lateral opening 22d extends between lubricant reservoir 22c and elementary lubricant dispense groove 22e.Elementary lubricant dispense groove 22e is along the longitudinal extension of roller pin 22.As illustrating best in Figure 16 and 17, elementary lubricant dispense groove 22e forms " 8 font " structure.
Should be known in that lubricant reservoir 22c can make lubricant reservoir in roller pin 22, and at breaker roll 24 in roller pin 22 rotary courses, supply to distributing trough 22e continuously through lateral opening 22d.Along with breaker roll 24 rotates around roller pin 22, lubricant dispense is to the bar of roller pin 22. Seal 34a, 34b remain on sliding agent on the bar of roller pin 22.
The second lateral opening 22i is positioned on the position of the second end 22b of contiguous roller pin 22, and intersects with lubricant reservoir 22c.Lateral opening 22i leads to groove 22j.The function of groove 22j and lateral opening 22i will illustrate afterwards.
Position at the second end 22b that is close to roller pin 22 also is formed with horizontal maintenance notch 22g.Arrange to keep notch 22g, make that the maintenance screw 29 in second holding device 28 can be positioned among the maintenance notch 22g.By this way, roller pin 22 can be with respect to second holding device, 28 orientations.Keep the use of notch 22g to make roller pin 22 after being connected to first connector 28, can carry out limited rotation.
As illustrating best in Fig. 3 and 20, pressure-equalizing device 36 is arranged to still near on the position that is formed on the countersunk among the lubricant reservoir 22c.When being positioned at roller integration member 20 in the depression 18, lubricant reservoir 22c leads to the hole 28e of second connector 28 facing to the part on pressure-equalizing device 36 right sides (as shown in Figure 3).The second lateral opening 22i of roller pin 22 leads to groove 22j (Figure 20), groove 22j again be formed on second connector 28 in aperture 28j aim at.The aperture 28j of second connector 28 leads to around the zone of breaker roll 24.Therefore, should be known in have from around the zone of breaker roll 24 to the pressure flow path of this static pressure-equalizing device 36.
The effect of pressure-equalizing device 36 is to guarantee in the ream operation process, the pressure of the sliding agent in the bearing bore (that is the gap between roller pin 22 and the breaker roll 24) equates basically with the pressure that surrounds the drilling slurry of rotary roller reamer 10 in the ream operation process fully.Balanced this pressure is to prevent that seal 34a, 34b explosion from being crucial.
As shown, pressure-equalizing device is a rigid filter 36.In one embodiment, strainer 36 is sintered metal filters.Sintered metal filter can have the alloy composition of the tin of 68% copper, 27% nickel and 5%, and micron is caught, and to equal or about be 30 μ m.Strainer 36 can adopt other composition.
As illustrating best among Fig. 3,18 and 19, the shape of the head 22a of roller pin 22 cooperates with the sidewall 26b of first connector 26.Therefore, head 22a is configured to the trapezoidal solid structure in side that external surface has cone cut.
Second thrust ring has the inside O-shape seal 32a of a small amount of shock absorbing between the bar of the internal diameter that is arranged to provide thrust ring 32 and roller pin 22.O-shape seal 32a also plays the effect that stops drilling slurry to flow.
Preferably elastomeric compounds makes by fluoridizing for O- shape seal 32a, 30a.
The assembling process of roll assembly 20 is as follows.Along the bar of roller pin 22 first thrust ring 30 that slides, up to its head 22a near roller pin 22.Then, will have seal 34a, 34b and the stabilized zone 75 that is in place and the breaker roll 24 that has assembled carbide tip 60 slided on the bar of roller pin 22, up to the first end 24a of breaker roll 24 near first thrust ring 30.Then, strainer 36 is installed on the countersunk of lubricant reservoir 22c.
In this stage, one (" the first hole 62b ") in via hole 62b is injected into lubrication oil in the breaker roll 24.Inject lubrication oil flows through another elementary engagement diameter of breaker roll 24 up to lubrication oil hole 62b (" the second hole 62b ").Then, setting pressure connector 63 is to seal up the second hole 62b.
Continue to inject lubrication oil, flow through lubricant reservoir 22c up to lubrication oil, and flow through equal press filtration device 36.At this point, take off the lubrication oil injection device, and pressure plug 63 is assembled among the first hole 62b.
Then, second thrust ring 32 is located on the bar of roller pin 22, up to its second end 24b near breaker roll 24.At last, second connector 28 is slided on the end of roller pin 22, so that make the end of second thrust ring 32 be in the concordant position of aiming at of planar section with the sidewall 28d of second connector 28.Then, will keep pack into screwed hole 28f and inwardly tightening of screw 29, thereby it is positioned among the maintenance notch 22g that forms in the bar of roller pin 22.
Then, the securing member that securing member 38 is inserted first connector 26 receives cavity 26c, and by self-lock pin 38a fix in position.
Then, steel ball 71 is put into blind hole 22f.Next, attachment screw 70 is screwed into hole 22f, withstands steel ball 71 securely up to it.This operation has guaranteed the constant depth of the engagement of first connector, 26 pair roller pins 22.Then, the head 70a of attachment screw 70 is passed the top 26f ' of the attachment screw notch 26f in first connector 26.By keeping connector 72 to insert the screw thread top 26f ' of attachment screw notch 26f, keep being connected between first connector 26 and the roller pin 22.Keep connector 72 to prevent that the head 70a of attachment screw 70 from by mistake extracting out from attachment screw notch 26f.
Show the location of attachment screw 70 among Figure 18 best at the attachment screw notch 26f of first connector 26.Show best among Figure 19 and keep the insertion of connector 72 in the 26f ' of the screw thread top of attachment screw notch 26f.
Such as will become apparent, make the connector 26 of winning can be with respect to limited hinged of roller pin 22 being connected between the head 22a of roller pin 22 and first connector 26, connector 26 be with respect to the suitable aligning of roller pin 22 in the time of still guaranteeing in the depression 18 that roller integration member 20 is assembled to rotary roller reamer 10 simultaneously.
In case assemble the element of roll assembly 20, as will be described, this roller integration member forms the single integration member in the depression 18 that is inserted into rotary underreamer 10 easily.
Then, a hex(agonal)screw cutter is passed hole 26d be inserted in first connector 26, and securing member 38 is screwed in the screwed hole 54 of the cylinder 52 among the bottom surface 18a that is formed on depression 18.When being screwed into securing member 38 in the hole 54, first connector 26 is pulled in the upper conical slot 46.Figure 20 shows the roller integration member 20 in the depression 18 that is assembled to rotary roller reamer 10.
Those skilled in the art should be known in the depression 18 that varying number can be provided on reamer body 16.In addition, although depression 18 is described as is around the circumference of reaming body equally spacedly at interval,, do not need always this situation.For example, can be they are spaced apart by index or logarithm value.
Should be known in that also breaker roll 24 can comprise elementary engagement diameter (that is, can adopt the form of a plurality of steps), carbide buttons, groove and the helix of different layouts and quantity.
The above embodiment of the present invention has beneficial effect, because:
1. utilize single locking device (for example, bolt 38) that each roller integration member 20 is remained in its corresponding depression 18.
2. because roller integration member 20 is assembled into independent " one " assembly, each roller integration member 20 can easily be assembled to the depression 18 of its correspondence and take out from corresponding depression.This makes it possible to roller integration member 20 be inserted depression 18 apace and take out from depression 18, therefore, helps to be reduced to as far as possible maintenance rotary underreamer 10 required downtime.
3. the layout of first holding device (first connector) 26 makes tightening of securing member 38 first holding device 26 can be pulled in the depression 18, and unclamping of securing member can mention first holding device 26, thereby whole roll assembly 20 is proposed depressions 18.When this has guaranteed that even condition is the poorest at the scene, also can take out roller integration member 20.
4. the neck down portions of reamer body 16 contiguous breaker rolls 24 helps the release of torsional stress, otherwise this torsional stress is concentrated in this zone of reamer body 16.Neck down portions also makes more mud to flow through to be clipped in the elementary mud road between the depression 18, and by with cross depression 18.When neck down portions also has any one mud road to stop up, provide the unidirectional path that connects each mud road in rotary roller reamer 10 uses.
5. the layout of carbide buttons 60,60a has reduced the quantity of the carbide that uses on the breaker roll 24, and has kept necessary performance.In addition, the layout that it is contemplated that carbide buttons can reduce the torque loads in the drill string.
6. described equal compress is put and the particularly use of lubricant cavity 22c middle filtrator 36, has improved the operation lifetime of roll assembly 20.
7. the load force on the rotary roller reamer in fact all is longitudinally, rather than horizontal.This causes the more long service live of rotary roller reamer.
8. in use, rotary roller reamer is to right rotation (that is clockwise direction when looking down wellhole).Breaker roll 24 will be to anticlockwise when meshing with wellhole.Along with the drill bit on the drill string end reduces diameter by the normal running wearing and tearing, reamer surpassing in the cycle of drill bit ability, guarantees the integrality of well diameter specification by its roll-in and fragmentation, with the hole gauge lattice that keep requiring.Therefore, reduced to take out the frequency of drill string fully from wellhole according to the use of the roller reamer of the embodiment of the invention for bit change more.
9. can provide roller integration member 20 at the scene, prepare at any time to use, and without any need for further element assembling.
Embodiment only describes in illustrational mode, and various modification comprises within the spirit and scope of the present invention.
Claims (28)
1. roll assembly that is used for rotary roller reamer, described roll assembly comprises the roller pin, is arranged to be installed to roller, first holding device and second holding device on the described roller pin, it is characterized in that,
Described roller pin has the head and the end that is arranged to be received in the hole that forms that is arranged to be hingedly connected to described first holding device in this second holding device, described end relies on fastening devices to be fixed to described second holding device, wherein said roller pin, roller, first holding device and second holding device are arranged to link together, so that form the integration member can be inserted in the depression that is formed in the described rotary roller reamer and to be fixed to described depression, this integration member is arranged to and is fixed to described depression by means of securing member.
2. roll assembly according to claim 1, wherein said first holding device comprises first connector, this first connector has the first surface that matches with the head of roller pin, with the second surface that is arranged to be meshed with the sidewall of described depression, the described sidewall of described depression and the described second surface of described first connector are configured to, when using described securing member by the engagement with described first connector integration member to be fixed to described depression, first connector is pulled in the depression.
3. the securing member that roll assembly according to claim 2, wherein said first connector have by the sidewall of first connector and bottom receives cavity, and this securing member receives cavity and is arranged to receive securing member.
4. roll assembly according to claim 3, wherein said first connector further comprises microscler screw mouth of connecting trough, described screw mouth of connecting trough is configured to receive the head of the screw that is arranged to be connected to roller pin head.
5. roll assembly according to claim 4, the head of wherein said screw can move to be provided at being articulated and connected between described roller pin head and described first connector along described screw mouth of connecting trough.
6. roll assembly according to claim 5 further comprises the maintenance connector, and this maintenance connector is in the described screw mouth of connecting trough to prevent that described screw head breaks away from unintentionally among described notch.
7. according to the described roll assembly of arbitrary claim among the claim 2-6, wherein first connector further comprises the hole of leading to described securing member reception cavity, this hole is arranged such that instrument can therefrom pass, so that securing member can be screwed into and be fixed to the mating part of described depression.
8. according to the described roll assembly of arbitrary claim among the claim 2-6, further comprise first thrust ring between first end of roller pin and roller, and at second end of roller and second thrust ring between described second holding device.
9. roll assembly according to claim 8, wherein first and second thrust rings are to sacrifice thrust ring.
10. roll assembly according to claim 8, the wherein first end complementation of the first surface of first connector and roller pin.
11. roll assembly according to claim 10, its central roll pin comprises bar, this bar have be formed on second end in the bar, that lead to the roller pin central longitudinal to blind hole.
12. roll assembly according to claim 11, wherein this blind hole forms lubricant reservoir, and this blind hole comprises the lateral opening that is substantially perpendicular to the blind hole extension and leads to elementary lubricant dispense groove.
13. roll assembly according to claim 12, wherein this elementary lubricant dispense groove is basically along the longitudinal extension of roller pin.
14. roll assembly according to claim 11 further comprises the sealing device between the bar that is provided at breaker roll and roller pin.
15. according to the described roll assembly of arbitrary claim among the claim 2-6, wherein first connector comprises the bottom, this bottom has the bottom surface that forms the shape that is meshed with the mating part of the depression of rotary roller reamer.
16. according to the described roll assembly of arbitrary claim among the claim 1-6, wherein second holding device comprises second connector, this second connector has the center longitudinal axis that is substantially perpendicular to second connector and the macropore that forms, and described macropore is arranged to receive the end of roller pin.
17. roll assembly according to claim 16, wherein second connector further comprises aperture, and this aperture has first end that leads to described macropore and lead to second end around the zone of roller when roll assembly is mounted in the rotary roller reamer.
18. roll assembly according to claim 17, wherein second connector further comprises projection, and this projection is arranged to and the engagement that is formed on the complementary shape in the part of depression.
19. roll assembly according to claim 18, wherein second connector further comprises the hole, and this hole is arranged to receive the described fastening devices that is used for the end of roller pin is fixed on second connector.
20. roll assembly according to claim 19, wherein this fastening devices comprises the maintenance screw.
21. roll assembly according to claim 17, its central roll pin are included in the lateral opening that extends between the aperture in the lubricant reservoir and second connector.
22. according to the described roll assembly of arbitrary claim among the claim 1-6, wherein said roller comprises core and first and second end parts, this core has the external diameter greater than the external diameter of first and second parts, and wherein core, first and second parts are covered with projection arrangement.
23. roll assembly according to claim 22, wherein projection arrangement is around this core location, a part of overlaid of wall that makes the contact zone of projection arrangement and extended boring.
24. roll assembly according to claim 23, wherein core upper process device is arranged to four lines, eight of every row, and be arranged on left-handed 3.31699 " on the pitch helix; each row is separated with 90 ° angular displacement; the starting point of every row begins with the incremental steps that equals 0.125 * 1/9 spiral reference length of curve, and each projection arrangement at interval helical curve length 1/9.
25. roll assembly according to claim 24, its further groove are between the row of each spiral spacer, the row of spiral spacer is created on the spiral reference path identical with projection arrangement.
26. according to the described roll assembly of arbitrary claim among the claim 1-6, wherein said roller comprises at least one lubricant entry hole and is used to stop up the plug-in device in described lubricant entry hole that described lubricant entry hole is arranged to sliding agent to be provided to the roller pin.
27. a rotary roller reamer comprises the reamer body and according to described at least one roll assembly of arbitrary claim among the claim 1-6, wherein said reamer body has at least one depression that is used to receive described at least one roll assembly.
28. rotary roller reamer according to claim 27, wherein each described roll assembly is fixed to its corresponding depression by single fastener.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2002952522 | 2002-11-07 | ||
| AU2002952522A AU2002952522A0 (en) | 2002-11-07 | 2002-11-07 | An Improved Rotary Roller Reamer |
| AU2003900650A AU2003900650A0 (en) | 2003-02-13 | 2003-02-13 | An improved rotary roller reamer |
| AU2003900650 | 2003-02-13 | ||
| AU2003902189A AU2003902189A0 (en) | 2003-05-07 | 2003-05-07 | Seal for a roller assembly |
| AU2003902189 | 2003-05-07 | ||
| PCT/AU2003/001485 WO2004042184A1 (en) | 2002-11-07 | 2003-11-07 | An improved rotary roller reamer |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010140082.1A Division CN101956532B (en) | 2002-11-07 | 2003-11-07 | Rotary roller reamer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1711404A CN1711404A (en) | 2005-12-21 |
| CN1711404B true CN1711404B (en) | 2010-10-06 |
Family
ID=28795912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200380102814.6A Expired - Fee Related CN1711404B (en) | 2002-11-07 | 2003-11-07 | Roller assembly and rotary roller reamer using same |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1711404B (en) |
| AU (1) | AU2002952522A0 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0904791D0 (en) * | 2009-03-20 | 2009-05-06 | Turbopower Drilling Sal | Downhole drilling assembly |
| GB2511964B8 (en) | 2011-12-27 | 2017-01-18 | Nat Oilwell Dht Lp | Downhole cutting tool |
| US11441360B2 (en) | 2020-12-17 | 2022-09-13 | National Oilwell Varco, L.P. | Downhole eccentric reamer tool and related systems and methods |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4182425A (en) * | 1977-05-23 | 1980-01-08 | Smith International, Inc. | Reamer |
| AU5843580A (en) * | 1980-05-15 | 1981-11-19 | Spelts, W.R. | Reamer stabilizer |
| US4561508A (en) * | 1980-08-01 | 1985-12-31 | Hughes Tool Company | Roller-reamer |
| US5381868A (en) * | 1993-10-08 | 1995-01-17 | Triumph*Lor Inc | Sealed bearing roller reamer |
| GB2349658A (en) * | 1999-04-14 | 2000-11-08 | Darron Oil Tools Ltd | A replaceable reamer assembly |
-
2002
- 2002-11-07 AU AU2002952522A patent/AU2002952522A0/en not_active Abandoned
-
2003
- 2003-11-07 CN CN200380102814.6A patent/CN1711404B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4182425A (en) * | 1977-05-23 | 1980-01-08 | Smith International, Inc. | Reamer |
| AU5843580A (en) * | 1980-05-15 | 1981-11-19 | Spelts, W.R. | Reamer stabilizer |
| US4561508A (en) * | 1980-08-01 | 1985-12-31 | Hughes Tool Company | Roller-reamer |
| US5381868A (en) * | 1993-10-08 | 1995-01-17 | Triumph*Lor Inc | Sealed bearing roller reamer |
| GB2349658A (en) * | 1999-04-14 | 2000-11-08 | Darron Oil Tools Ltd | A replaceable reamer assembly |
Non-Patent Citations (1)
| Title |
|---|
| US 4182425 A,全文. |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1711404A (en) | 2005-12-21 |
| AU2002952522A0 (en) | 2002-11-21 |
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