CN1008384B - Rotary-track clamping-bush type packer - Google Patents
Rotary-track clamping-bush type packerInfo
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- CN1008384B CN1008384B CN 87106083 CN87106083A CN1008384B CN 1008384 B CN1008384 B CN 1008384B CN 87106083 CN87106083 CN 87106083 CN 87106083 A CN87106083 A CN 87106083A CN 1008384 B CN1008384 B CN 1008384B
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Abstract
The present invention relates to an improved rotary track slip type packer for oil and gas wells, particularly to a rotary track slip type packer using a casing pipe with the outer diameter of 139.7 millimeters, which is composed of a packing sealing device, a slip anchor, a locking device and a track steering device. The packer of the present invention is characterized in that the number, thickness, width, slip insert face length and other main design parameters of the slips of the slip anchor simultaneously reach the optimal design values; slip supports have combined structure, the slip anchor is assembled sheet by sheet but not assembled integrally, and a novel locking device and improved J-shaped sliding grooves are provided.
Description
The present invention relates to improved oil, gas well rotary-track clamping-bush type packer, the rotary-track clamping-bush type packer when particularly using external diameter to be 139.7 millimeters sleeve pipes.
Slip-type packer is one of oily, that the gas field is used important downhole tool, and its various performances are directly connected to oil, gas field technological transformation.Slip-type packer can prevent moving axially of tubing string, and used packing element is a compression, generally all by transferring certain tubing string weight seat card and setting.The oil of Zhongyuan Oil Field, gas bury deeply, permeability is low, the oil production technology complexity.What adopted in a large number in the oil field at present is Shengli Oil Field product SL251-6 type slip-type packer, because design is reasonable inadequately, so safe seating sealing load is little, Chang Yi causes the slips anchor with casing collapse the deep-well for about three kms of Zhongyuan Oil Field, operating difficulties, the accident that often causes the down-hole to block, break, take off.The slip-type packer of the companies such as Halliburton that employing is once introduced also often is stuck in the down-hole equally and rises to come out.
Oily at present, the used slip-type packer in gas field, the slips holder of its slips anchor is monolithic, and the slips anchor is made up of stop collar, sphenoid, slips and slips holder.It is four that the sheet of slips is counted great majority, also has the minority product to adopt six chip architectures, but for the necessary attenuate of the thickness that adapts to its six chip architectures slips of assembly relation.Under whole assembling form, no matter the sheet number of slips is four or six, the Breadth Maximum of slips must not be when assembling with sphenoid each slip groove of sphenoid end face limit the length of side of minimum n-shaped (N=4-6) of the formation of slips, therefore this integral installation distribution structure has following shortcoming: (1) needs certain special assembling tool, otherwise is difficult to assembling; (2) major parameter mutual restriction such as the sheet number of slips, thickness, width, facing length, they can't reach the optimal design value simultaneously, thereby cause the slips anchor not reach main design performance.Analyze theoretically, after the packer carrying, the stress distribution on the casing wall and slips sheet number, facing length, width and thickness have direct relation, and especially the sheet number of slips has the greatest impact.The slips anchor of prior art because its structure is limit, makes every design parameters can not reach the decision design value simultaneously, so the supporting capacity of this class packer itself is low.The stress distribution of casing wall is extremely inhomogeneous, is one of major reason that causes down-hole accident.
The slips holder of prior art slips anchor is an overall structure, its assemble sequence is: slips is all packed in the T type groove in the slips holder, and the N limit shape that slips is formed remains on the minimum inscribed circle diameter, from axial direction was all packed slips into the dovetail groove of sphenoid from top to bottom, this overall structure made the main design parameters of slips can not reach the optimal design value simultaneously then.
Secondly, the syndeton of the centralizer of prior art and slips anchor all adopts whole coordinated type, the shortcoming of this structure is as follows: when the track pin of centralizer moves back and forth between the top dead-centre of J-shaped groove and bottom dead centre, the slips holder of drive slips anchor accompanies with it and moves, so also action together thereupon of slips.Because the ramp effect of the dovetail keyway of sphenoid makes the design size of slips can not get guaranteeing.The radial design size of slips is guaranteed in order to scurry on centralizer, and unique way is with the slips reduced thickness, and the consequence of doing like this is that slips ruptures easily or comes off, and slip insert face length degree is reduced.Therefore must transform the whole linkage structure of this centralizer and slips anchor.
The 3rd, domestic each oil field of China's use at present and the Halliburton of introduction, the Bake, the packer that the various rotations of Ka Moke set, because their J type rail groove all adopts the blind slot type of J type, it sets mode and all adopts traditional mode, promptly will carry on the tubing string to seating sealing height earlier, just make track pin be in J type groove bottom dead centre, transfer tubing string then while rotating, make the movement locus of track pin become a kind of resultant motion, track pin sets be imported into J type track flute length rail under resultant motion after, because this rail groove top dead-centre is blind slot type, quite difficulty, the particularly operation of the deep-well of Zhongyuan Oil Field are just difficult more in the operation setting.Also because the axial effective travel of track pin resultant motion is not more than 50 millimeters, axially transfer in the process at these 50 millimeters, in case not harmony of resultant motion, just easily make track pin import J type groove top dead-centre, thereby can not set successfully, in a single day this situation takes place, and only way is that tubing string is mentioned, repeat aforementioned process again, set up to generation.Particularly in the heavy duty service of Zhongyuan Oil Field, under so little axial effective travel situation, produce setting of surely leaning on and be and be difficult to guaranteedly, also promptly both difficultly determine rotating cycle; Be difficult to guarantee suitable seating sealing load again, sometimes even can't set.Also have abroad and adopt J type chute-type track steering structure, this J type chute-type, because of setting the short track top dead-centre that track pin is in J type chute, can make the resultant motion that sets operation be decomposed into the substep operation, rotation is earlier transferred again, its prerequisite is to make sliding surface 39 big as much as possible, the sliding surface angle [alpha] guarantees between 10-15 ° (referring to accompanying drawing 9) as far as possible, otherwise track pin produces wriggling and distortion soon because of the tubing string lowering velocity easily, enter in the long track 41 thereby skid off sliding surface 39 automatically, so that produce mistake seat (referring to accompanying drawing 9).US Patent specification 4524825 provides by the syndeton of packing sealing, slips anchor, centralizer and slips anchor and J type chute-type track knuckle section to be formed.Because the connected mode of its slips anchor and centralizer is whole coordinated type, so the rail groove of this J type chute-type still has the basic shortcoming of this integral body linkage type.The J type groove sliding surface of this invention itself just is in a kind of contradiction state, because of the sliding surface of this J type groove also is the track inclined-plane simultaneously, its sliding surface and vertical line angle are difficult to find out optimum value, if this angle is bigger, easily pin is skidded off when then setting, but the ability that automatically resets is just very poor; If this angle is less, then reset capability improves, but track pin just is difficult to skid off when setting, and it is big that the axial distance of J type rail groove also will become, this J type chute-type packer the time also needs enough dextrorotation number of turns in operation, as seen its operating reliability also be difficult to guaranteed.
The object of the present invention is to provide a kind of improved rotation slip-type packer, the novel slips anchor structure and the locking partition type structure and the improved J type chute-type rail groove of slips anchor and centralizer particularly are provided, to improve the stress of sleeve pipe, the fracture that prevents slips with come off, raising simultaneously sets success rate, alleviates labor strength.
Through years of researches, by theoretic calculating, according to optimum implementation of the present invention, above-mentioned purpose reaches fully.The present invention seeks to reach like this: the invention provides a kind of slips anchor of new structure, reach the optimal design value simultaneously with the main design parameters that guarantees slips; The present invention has also designed new type of locking device, changes the syndeton of centralizer and slips anchor into the locking partition type from whole coordinated type, reaches the optimal design value simultaneously with each important parameter of further assurance slips anchor; J type rail groove is improved to novel J type sliding tray, thereby a kind of improved rotary-track clamping-bush type packer is provided.
When using external diameter to be 139.7 millimeters sleeve pipes, make each design parameters of slips reach the optimal design value simultaneously, promptly the slips sheet is 6, and slips thickness is 23 millimeters, and the slips width is the 28-34 millimeter, and slip insert face length degree is the 78-108 millimeter; The size of the slips block of combined type slips holder is divided big young waiter in a wineshop or an inn's kind, and the syndeton of said centralizer and slips anchor is the locking device as the partition type structure; Said J type chute-type structure is two symmetrical J type grooves leaving on central tube 11, its sliding surface length is 35 millimeters, the sliding surface horizontal sextant angle is 10-15 °, and the angle on J type track inclined-plane is 30-40 °, and the short track top dead-centre of J type rail groove and the center to center distance of bottom dead centre are 52 millimeters.
The slips block of said combined type slips holder is made up of three lesser calorie eaves tile pieces and three kilocalorie eaves tile pieces, form a complete cylindrical surface by these six slips blocks, form two T type grooves by one of them kilocalorie eaves tile piece and two lesser calorie eaves tile pieces that are adjacent, the radial location anchor ring of said six slips blocks all is assemblied in the radial location cannelure of connecting ring, by fastening bolt the screw of connecting ring and these six slips blocks is tightened.
Said locking device as the partition type structure is made up of the lock ball annular groove on guard shield, four lock balls, lock ring covers, block cover, the central tube, guard shield and lock ball cover connect as one by internal and external threads, four lock ball holes evenly distribute on the face of cylinder of lock ball cover, there is flange lock ball cover lower end, block to overlap on the inner cylinder face lock ball annular groove is arranged, its lower end and centralizer link into an integrated entity, one lock ball annular groove is arranged on the central tube, and four lock balls are contained in respectively in lock ball hole and the central tube lock ball annular groove.
The diameter of lock ball is advisable with 14 millimeters.
Below in conjunction with accompanying drawing packer of the present invention is elaborated.
Accompanying drawing 1 is a packer schematic diagram of the present invention; Accompanying drawing 2 be when the cover external diameter of pipe be 139.7 millimeters, casing thickness is 6.2 millimeters, when seating sealing load was 100,000 Ns, the slips number was the slips facing half-angle θ of three kinds of slips anchors of 3,4,6
kWith circumferential stress σ on the casing section annular
θThe relation curve that changes; Accompanying drawing 3 is slips facing half-angle θ
kSchematic diagram; Accompanying drawing 4 is slips anchor schematic diagrames; Accompanying drawing 5 is slips anchor slips part A-A cross-sectional views; Accompanying drawing 6 is B-B cross-sectional views of slips holder connecting ring part; Accompanying drawing 7 be packer slip anchor of the present invention and other like product under the same conditions, the comparison that distributes in the circumferential stress of internal surface of sleeve pipe, sleeve outer wall; Accompanying drawing 8 is the tight lock partition type structural representations that connect centralizer and slips anchor; Accompanying drawing 9 is J type sliding tray schematic diagrames of the present invention.
Packer of the present invention is seen accompanying drawing 1, turns to four parts to form by packing sealing, slips anchor, locking device and track.The packing hermetic unit is made up of top sub 1, long packing element type 3,7, short rubber cylinder 5, spacer ring 4 etc.Slips anchor part is made up of wedge shape cap 8, sphenoid 10, slips 17, combination slips holder 14,19,20,21.Locking device is 14 millimeters by guard shield 22, lock ball 23(diameter), block cover 29, central tube lock ball annular grooves 24 of 37, four in lock ball cover form.Track commutation part is made up of brake pad 31, compression spring 32, centralizer 30, track pin 34, orbit centre pipe 11.
In packer is gone into the well process, track pin 34 is in short orbital position 38, when the seating sealing height of packer down to the design well depth, and rotation pipeline post 1-2 circle, make track pin 34 change to long track 41 automatically, transfer tubing string again, track commutation part is slided relatively along long track 41, discharges locking device automatically, the slips anchor is anchored on the internal surface of sleeve pipe, continue to transfer tubing string again, because the weight of tubing string compression packing element 3,5,7, thereby the sealing oil sets annular space.Packer of the present invention can be used for hydraulic piston and recovers the oil, blocks water blockoff, water detection, gas-lift production, gas anchor, separate stratum fracfturing, formation testing by layer etc. down.The used casing inner diameter of packer of the present invention is the 118.6-127.3 millimeter, particularly 127.3 millimeters.
The present invention has studied the main design parameters of slips theoretically, it the results are shown in accompanying drawing 2, and accompanying drawing 2 is the cover external diameter of pipe to be 139.7 millimeters, and casing thickness is 6.2 millimeters, when seating sealing load was 100,000 Ns, the slips number was 3,4 or the slips facing half-angle θ of 6 three kind of slips anchor
kVariation and the casing section annulus on circumferential stress σ
θThe graph of a relation that changes.Wherein: the slips number is that 3 outer wall stress curve is 310, and the slips number is that 3 inboard wall stress curve is 320; The slips number is that 4 the wall stress curve of locating is 410, and the slips number is that 4 inboard wall stress curve is 420; The slips number is that 6 outer wall stress curve is 610, and the slips number is that 6 inboard wall stress is 620.The unit degree of being of slips facing half-angle; And stress σ
θUnit be kg/cm.Half-angle θ about the slips facing
kSchematic diagram see accompanying drawing 3, b for the pipe outer wall radius, δ is a casing wall thickness, a is the radius of internal surface of sleeve pipe, q is the radial load that unit slips facing contacts with internal surface of sleeve pipe.From each curves contrast of accompanying drawing 2 as seen, circumferential stress maximum during N=3, and circumferential stress minimum during N=6, when circumferential stress is big easily with casing collapse, so big more σ of N
θMore little, under accompanying drawing 2 situations, can unlikely being squeezed of protective casing ruin with N=6.It seems from the contrast of inside and outside wall stress curve, in the left side of two equal inside and outside wall stress intersections of complex curve of N, along with θ
kReduce, outer wall circumferential stress slope of a curve increases gradually; And the inwall circumferential stress slope of curve reduces gradually, and therefore, the intersection point of inside and outside wall circumferential stress curve is exactly θ
kThe lowest critical value of value.θ
kValue is the function that sleeve pipe inside radius a, sleeve pipe outer radius b, casing wall thickness δ, slips sheet count N, i.e. θ
k=f(a, b, δ, N), as with above-mentioned each functional value substitution θ
kOptimize formula, just can calculate corresponding θ
kAt this moment minimum value has also just determined the minimum widith of slips facing under certain condition.
According to above-mentioned theory, design a kind of novel packer slip anchor, this slips anchor mainly is made up of wedge shape cap 8, sphenoid 10, caging bolt 12, fastening bolt 14, slips 17, lesser calorie eaves tile piece 19, kilocalorie eaves tile piece 20, connecting ring 21 8 parts, sees accompanying drawing 4.Accompanying drawing 5 is slips anchor slips part A-A cross-sectional views, and accompanying drawing 6 is B-B cross-sectional views of slips holder connecting ring part.The main design load of slips anchor has all satisfied each optimal design value, mainly embodies following main aspect:
1, N sheet (N=4-6) slips of new slips anchor is identical in the diameter phi of the forward and backward interior N limit shape inscribed circle of forming of assembling, see accompanying drawing 5, thereby can guarantee that its thickness reaches the optimal design value under a fixed structure, when using external diameter to be 139.7 millimeters sleeve pipes, the slips Optimization and design of thickness value of slips anchor is 23 millimeters.
2, when the inclined-plane of dovetail keyway 49 that the thickness of new slips anchor slips reaches optimal value and sphenoid 10 under a fixed structure during for certain value, can make the Design of length of slips facing reach optimal value, when using external diameter to be 139.7 millimeters sleeve pipes, slips anchor slips facing length optimization design load of the present invention is the 78-108 millimeter.
Since the inscribed circle diameter φ that N sheet (N=4-6) slips of 3 new slips anchors is joined the forward and backward N limit shape of forming in peace is identical, then when guaranteeing slips thickness, also can make the length of side maximum of the N limit shape of N sheet slips composition, see accompanying drawing 5, that is to say that the width of slips is issued to the optimal design value in certain structure.When using external diameter to be 139.7 millimeters sleeve pipes, the optimal design value of the width of slips anchor slips of the present invention is the 28-34 millimeter.
4, when the slips sheet number that with external diameter is 139.7 millimeters sleeve pipes, new slips anchor is 6,2 analysis as seen with reference to the accompanying drawings, along with the increase that the slips sheet is counted N, the circumferential stress on the casing wall is more little to be tending towards even distribution with circumferential stress, but the minimum widith of slips is subjected to slips facing half-angle θ again
kCritical restriction, thereby under a fixed structure, the sheet number of slips can not unrestrictedly increase, when being 139.7 millimeters sleeve pipes with external diameter, it is optimum value that the sheet of slips is counted N=6, when being 177.8-219.1 millimeter sleeve pipe with external diameter, the sheet number of slips can reach 8.
Table 1 shows the embodiment and the similar products at home and abroad of the main design parameters of packer slip anchor slips of the present invention: the comparison of Shengli Oil Field SL251-6, U.S. Halliburton Company, U.S. Baker Co., Ltd, from wherein as seen, the slips of slips anchor of the present invention is when being 139.7 millimeters sleeve pipes with external diameter, the sheet of slips several 6 is an optimum value, at this moment slips thickness is 23 millimeters, all thicker than other like product, thereby slips of the present invention easy fracture or come off least; The slips angle of wedge is 15 °, if angle is excessive, then slip insert face length degree is shorter, and promptly the contact area of slips and sleeve pipe is little, and sleeve stress is not in good state, if angle too small, though then slip insert face length degree is long, vertically moving of slips is big, stressed also inhomogeneous; Slip insert face length degree is that 78-108 millimeter and slips width are that the 28-34 millimeter all can cause the stress of slips and sleeve pipe to be the best, this shows the superiority of slips anchor of the present invention.
Table 1
Design parameters slips anchor of the present invention SL
251 Halliburton Bakes
Embodiment-6 type
The slips sheet several pieces 6464
15 ° 15 ° 12 ° 20 ° of slips angle of wedge degree
Slip insert face length degree millimeter 90 62 53 58
It is under the condition of 139.7 millimeters, wall thickness δ=7.72 millimeter at seating sealing load Q＞19.6 thousand N, cover external diameter of pipe OD that accompanying drawing 7 shows packer slip anchor of the present invention, with the SL251-6(Shengli Oil Field), Halliburton Company's like product is at the circumferential stress distribution σ of internal surface of sleeve pipe (ID), sleeve outer wall (OD)
θComparison, longitudinal axis stress σ
θUnit be kg/cm, transverse axis for the degree.With 11 and the 12(thick line) represent the circumferential stress distribution curve of the present invention respectively at internal surface of sleeve pipe and sleeve outer wall, with 21 and 22(in thick line) represent the circumferential stress distribution curve of U.S. Halliburton Company product at internal surface of sleeve pipe and sleeve outer wall; With 31 and the 32(fine rule) expression Shengli Oil Field SL251-6 product is at the distribution curve of circumferentially should being engaged in of internal surface of sleeve pipe and sleeve outer wall.Circumferential stress on the inside and outside wall of sleeve pipe of the present invention as seen from the figure is minimum and distribute the most evenly, ruins thereby sleeve pipe is not squeezed by the slips anchor.
5, in order to satisfy the condition of design, change whole slips holder the holder of into combination slips, slips holder after the improvement is by three lesser calorie eaves tile pieces 19, three kilocalorie eaves tile pieces 20, connecting ring 21 and nine fastening bolts 14 are formed (seeing accompanying drawing 4,5), by a kilocalorie eaves tile piece and two adjacent lesser calorie eaves tile pieces forms two complete T type grooves 18, concrete size is decided through big or small on T-slot and central axis.The assembling mode of new slips anchor is as follows: in the dovetail keyway 49 of the sphenoid 10 of earlier slips 17 all being packed into, then from radial direction is all packed three big blocks 20 of slips and three little blocks 19 of slips into the T type groove of being made up of two adjacent card tilings 18, again the radial location anchor ring 47 of six slips blocks is all packed in the radial location cannelure of connecting ring 21, again fastening bolt 14 is passed the circular hole 13 of connecting ring 21 and the screw 50 of six slips blocks and tighten.
The centralizer of packer of the present invention (seeing accompanying drawing 8) is made up of centralizer body 30,31,36 compressions of six brake pads spring 32, two track pins 34, pressure caps 35.The locking device of packer of the present invention is by guard shield 22, block and overlap 29, four lock ball 23(diameters are 14 millimeters), lock ball cover 37, central tube lock ball annular groove 24 is formed, guard shield 22 and lock ball cover 37 are by internal and external threads 15,16 connect as one, four lock ball holes 25 evenly distribute on the face of cylinder of lock ball cover 37, lock ball overlaps 37 lower ends has a flange 44 cover that can prevent to block 29 to come off, block to overlap on 29 inner cylinder faces lock ball annular groove 28 is arranged, its lower end and centralizer connect as one, there are 24, four lock balls 23 of a lock ball annular groove to be contained in respectively in lock ball hole 25 and the central tube lock ball annular groove 24 on the central tube 11.The assemble sequence of locking device is as follows: lock ball cover 37 is contained on the central tube 11, and loads onto lock ball 23 after lock ball hole 25 on the lock ball cover 37 is aligned with lock ball annular groove 24, the cover 29 of will blocking again is contained on the lock ball cover 37.Because lock ball overlaps the effect of 37 upper flanges 44 cover 29 of blocking can not be come off, by screw thread 16 guard shield 22 and lock ball cover 37 are connected together, screw thread 15 links together guard shield 22 and connecting ring 21 again, and screw thread 45 cover 37 of will blocking again connects as one with centralizer.When the track pin 34 of centralizer is mobile between the top dead-centre 38 of J type rail groove 33 short grooves and bottom dead centre 40 (seeing accompanying drawing 9), the drive cover 29 of blocking is done relative motion with lock ball cover 37, and its displacement L is not enough so that the annular groove 28 on the cover 29 of blocking matches with locking hole 25 on the lock ball cover 37.Under the effect on the face of cylinder 27 of cover on 29 of blocking, make lock ball 23 can not withdraw from lock ball annular groove 24 on the central tube 11, thereby lock ball cover 37 moving axially and move with centralizer not.Since the 37 not releases of lock ball cover, thus guarantee that combination slips holder (14,19,20,21) is not moving thereupon, and the radial design size of slips can be guaranteed the optimum value under a fixed structure as a result, and the main optimal design parameter of slips anchor is further guaranteed.The locking partition type structure of this connection slips anchor and centralizer is the present invention and other key character of prior art phase region, because the prior art packer is whole linkage structure, do not have this structure of locking device, therefore this structures shape the important design parameter of prior art slips anchor slips can not reach the optimal design value simultaneously.Tubing string dextrorotation when packer of the present invention, the elongated slot 41(that the track pin 34 of while centralizer slips into J type rail groove 33 sees Fig. 9) time, transfer the tubing string (see figure 9), because the brake pad 31 of centralizer produces a kind of frictional force under the effect of compression spring 32 and between the casing wall, stop centralizer to be transferred, make the cover 29 of blocking produce relative motion significantly with lock ball cover 37 with oil pipe.The annular groove 28 of cover on 29 of blocking matched with lock ball hole 25 becomes possibility, in case coincide, lock ball 23 withdraws from the lock ball annular groove 24 on the central tube 11, and lock ball overlaps 37 releases, and this moment, the interior upper surface 46 of guard shield 22 was continued the prevention cover 29 of blocking up.Because the effect of the frictional force between centralizer brake pad 31 and the casing wall makes central tube 11 and slips anchor produce relative motion, under the effect of sphenoid 10 slips is strutted, and reaches the purpose that sets.Though this locking device is a usual means, but using and improving packer performance on the packer still is that the present invention initiates, locking device makes the major parameter of slips anchor reach the optimal design value simultaneously and is further guaranteed, and cooperate with improved J type chute, make packer performance of the present invention reach the optimal design requirement.
J groove track groove of the present invention is that J type chute-type (seeing accompanying drawing 9) is characterized in that, on central tube 11, have the J type groove of two symmetries that add as shown in Figure 9, the length of its sliding surface 39 is 35 millimeters, sliding surface horizontal sextant angle α is 10-15 °, the angle 43 on J type track inclined-plane 42 is 30-40 °, is 52 millimeters apart from L in the heart in the top dead-centre 38 of the short track of J type rail groove and the bottom dead centre 40.
The longer speed of transferring owing to oil pipe that more can prevent effectively of the length of sliding surface 39 produces wriggling soon and twists by mistake setting of being caused midway.α is excessive as the sliding surface horizontal sextant angle, and then in setting operating process during the dextrorotation tubing string, the sliding association process of track pin 34 is caused excessive resistance, thereby be difficult to realize that this sets operating process, even failure; Too small as the sliding surface horizontal sextant angle, then in the normal operation process, be easy to generate midway and sit by mistake.Angle 43 as J type track inclined-plane 42 is excessive, then the performance that automatically resets of track pin 34 is destroyed; As too small, will make the length of sliding surface 39 less than normal again, in J type chute of the present invention, angle 43 is located between 30-40 ° and suits.
The present invention is by the main design parameters of preferred slips anchor, the Slips anchor is provided, the slips that has solved anchor packer squeezes the key issue of ruining sleeve pipe, make the slips anchor after grappling, improving the stress in the sleeve pipe, reach and improve the anti-purpose of squeezing the maximum safe seating sealing load of ruining of sleeve pipe, is example with grade of steel J-55 sleeve pipe, can make anti-the squeezing of sleeve pipe ruin load and reach 294,000 Ns, and Halliburton's packer is 121.4 thousand Ns.The slips holder of slips anchor of the present invention is knockdown, when assembling, need not special assembling tool on the one hand; Make the main design parameters of slips reach the optimal design value simultaneously on the one hand.The present invention also at first uses locking device on packer, the setting of this locking device makes the linkage structure of slips anchor and centralizer change locking partition type structure into, thereby makes the radial design size of slips can guarantee optimum size under a fixed structure.The present invention has also solved the appropriate design problem of J type rail groove, not only prevent from effectively to sit midway by mistake, and changed up hill and dale traditional type on carry tubing string behind seating sealing height, transfer the mode that sets while rotating, after the architecture advances, can determine the rotating cycle under the normal condition, only can guarantee certain seating sealing load, guarantee in 3500 meters under the well depth situation, only rotate the 1-2 circle on ground and can produce the stable effect that sets, this effect is given prominence to, thereby improves gas, oil well operation quality and efficient, alleviates the labour intensity of operating worker.Up to the present, rotary-track clamping-bush type packer of the present invention has stood the inferior test of field trial 171 wells, accomplish that all only rotating 1-2 on ground encloses, once set successfully, thereby never find the crowded sleeve pipe accident of not coming out of ruining of slips, these tests prove reasonability, high degree of flexibility and the operational reliability that the present invention designs fully.
Some embodiments of the present invention below only have been described, many different changes and improvement also can have been arranged, should be appreciated that these changes and improve the scope that all belongs to claim of the present invention according to inventive concept.
Claims (4)
1, a kind of rotary-track clamping-bush type packer, has the packing sealing, the slips anchor, the syndeton of centralizer and slips anchor and track turn to four parts, said slips anchor is by wedge shape cap 8, sphenoid 10, slips 17, the slips holder is formed, said slips holder is by fastening bolt 14, connecting ring 21 and slips block are formed, said track knuckle section is a J type chute-type structure, it is characterized in that, said slips 17 is when using external diameter to be 139.7 millimeters sleeve pipes, following design parameters reaches the optimal design value simultaneously: slips sheet number is 6, slips thickness is 23 millimeters, the slips width is the 28-34 millimeter, slip insert face length degree is the 78-108 millimeter, said slips holder is a fabricated structure, its slips block size is divided big young waiter in a wineshop or an inn's kind, the syndeton of said centralizer and slips anchor is the locking device as the partition type structure, said J type chute-type structure is two symmetrical J type grooves leaving on central tube 11, the length of its sliding surface 39 is 35 millimeters, sliding surface horizontal sextant angle α is 10-15 °, the angle 43 on J type track inclined-plane 42 is 30-40 °, and the top dead-centre 38 of the short track of J type rail groove is 52 millimeters with the center to center distance L of bottom dead centre 40.
2, according to the described rotary-track clamping-bush type packer of claim 1, it is characterized in that: the slips block of said combined type slips holder is made up of three lesser calorie eaves tile pieces 19 and three kilocalorie eaves tile pieces 20, form a complete cylindrical surface by said six slips blocks, wherein form two complete T type grooves 18 by a kilocalorie eaves tile piece 20 and two little slips link stoppers 19 that are adjacent, the radial location anchor ring 47 of said six slips blocks all is assemblied in the radially sizing of connecting ring 21 in the cannelure of location, by fastening bolt the connecting ring 21 and the screw 50 of said six slips blocks is tightened.
3, according to the said rotary-track clamping-bush type packer of claim 1, it is characterized in that: said locking device as the partition type structure is by guard shield 22, four lock balls 23, lock ring cover 37, block and overlap 29, lock ball annular groove 24 on the central tube 11 is formed, guard shield 22 and lock ball cover 37 are by internal and external threads 15,16 connect as one, four lock ball holes 25 evenly distribute on the face of cylinder of lock ball cover 37, lock ball overlaps 37 lower ends the flange 44 that cover comes off that prevents to block, block to overlap on 29 inner cylinder faces lock ball annular groove 28 is arranged, its lower end and centralizer link into an integrated entity, having 24, four lock balls of a lock ball annular groove to divide on the central tube 11 is contained in lock ball hole 25 and the central tube lock ball annular groove 24 in addition.
4, according to the said rotary-track clamping-bush type packer of claim 3, it is characterized in that: the diameter of said lock ball 23 is 14 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87106083 CN1008384B (en) | 1987-09-04 | 1987-09-04 | Rotary-track clamping-bush type packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87106083 CN1008384B (en) | 1987-09-04 | 1987-09-04 | Rotary-track clamping-bush type packer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1031742A CN1031742A (en) | 1989-03-15 |
| CN1008384B true CN1008384B (en) | 1990-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87106083 Expired CN1008384B (en) | 1987-09-04 | 1987-09-04 | Rotary-track clamping-bush type packer |
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| CN (1) | CN1008384B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2876250B1 (en) * | 2012-07-23 | 2018-01-17 | Starse Energy and Technology (Group) Co., Ltd. | Liner hanger top packer |
| CN103982153B (en) * | 2014-05-30 | 2017-02-08 | 四机赛瓦石油钻采设备有限公司 | Ball injecting de-blocking hydraulic tubing anchor |
| CN106285514A (en) * | 2016-10-18 | 2017-01-04 | 裴绪建 | A kind of drill string rotating pressurizing tool |
| CN113914812B (en) * | 2020-07-10 | 2023-11-24 | 中国海洋石油集团有限公司 | High-temperature-resistant double-sealing packer and application method thereof |
| CN117108240A (en) * | 2023-09-27 | 2023-11-24 | 武汉齐达康能源装备有限公司 | Fracturing open flow device |
-
1987
- 1987-09-04 CN CN 87106083 patent/CN1008384B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1031742A (en) | 1989-03-15 |
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