CN204941397U - String cleaner - Google Patents
String cleaner Download PDFInfo
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- CN204941397U CN204941397U CN201520627410.9U CN201520627410U CN204941397U CN 204941397 U CN204941397 U CN 204941397U CN 201520627410 U CN201520627410 U CN 201520627410U CN 204941397 U CN204941397 U CN 204941397U
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Abstract
The string cleaner that the application provides comprises: the body with first end and the second end that lengthwise extends, and first end can be connected with tubing string, and the second end can be connected with mud motor; Be opened in the first chamber between first end and the second end in body, the first chamber can be communicated with tubing string, and the sidewall of body offers the first through hole with the first chamber.The application by offering the first through hole of connection first chamber on the sidewall of body, first chamber can be communicated with tubing string, thus linked up tubing string and annular space, formation can for the flushing channel of cleaning fluid circulation, this flushing channel can change the flow direction of cleaning fluid, realize ground squeeze into cleaning fluid, down-hole cleaning tubing string, complete cleaning cleaning fluid on the object in ground return face, overcome that prior art wastes time and energy in the face of tubing string carries out cleaning on ground, complex procedures, affect the deficiency of construction progress, greatly improve cleaning efficiency.
Description
Technical field
The application belongs to petroleum gas drilling and repairing well technical field, particularly relates to a kind of string cleaner.
Background technology
In drilling and repairing well process, tubing string, as drilling fluid transfer passage, can provide fluid power for mud motor.
At present, using more in engineering is helicoid hydraulic motor, and the stator of helicoid hydraulic motor adopts rubber mostly.But rubber bearing capacity is more weak, and drilling fluid is easily missed, fluid power is caused to decline, drilling tool power loss; And the heat resistance of rubber is poor, easily aging and tear; In addition, under the acting in conjunction of the gentle oil well hydrocarbon of well, it is swelling to there is corrosion in rubber, and this swelling in addition may be uneven because of the anisotropy of elastomeric material, stator profile is changed.Therefore, when ask for something height fluid power, well temperature is higher or hole condition complicated condition such as down-hole exists corrosive gas or liquid, usually adopt the power drilling tool with the relatively high metal stator of intensity.
Metal stator can overcome the above-mentioned deficiency of elastomer stator.Compared with elastomeric material, metal can keep higher strong hardness at a relatively high temperature, therefore the shape of metal stator can not change because of the change of external condition such as temperature, pressure easily, and metal stator can keep better assembly relation with rotor in relatively long construction period.Also just so, the power drilling tool with metal stator is also higher to the purity requirements of drilling fluid.Otherwise if containing impurity in drilling fluid, gently then impurity may be cut to pieces and hinders metal stator and rotor surface, and then stress may be produced concentrate cutting to pieces injury, affect application life; The possible clamping stagnation of heavy then impurity, between metal stator and rotor, makes power drilling tool by brake hard, construction accident occurs.The impurity product that mainly drilling fluid and metal tubing string generation chemical reaction generate accumulates formation for a long time.Therefore, before use has the power drilling tool of metal stator or other mud motors higher to the purity requirements of drilling fluid carry out drilling and repairing well operation, generally need to clean tubing string, during to remove front subjob, be retained in the impurity in tubing string.
In prior art, usually clean tubing string is carried to ground, then will enter in the sleeve pipe of Oil/gas Well under tubing string; For longer tubing string, also need under normal circumstances to carry out segmented cleaning by after tubing string segmentation fractionation; Not only waste time and energy, and complex procedures, affect construction speed.In addition, ground environment is poor, completes tubing string cleaning, is undertaken in assembling process, other dirts such as earth or harder stone still may be had tubing string and mud motor to mix and enter tubing string, the pollution again after causing tubing string to clean.
Utility model content
The object of the application's embodiment is to provide a kind of device that can carry out fully cleaning in down-hole quickly and easily to tubing string.
For solving the problems of the technologies described above, the application provides a kind of string cleaner, and it comprises: lengthwise extend body, described body have back to first end and the second end, described first end can be connected with tubing string, and described second end can be connected with mud motor; Be opened in the first chamber in described body, described first chamber is between described first end and described second end, and described first chamber can be communicated with described tubing string, and the sidewall of described body offers the first through hole with described first chamber.
In an embodiment, axle is provided with in described first chamber, the second chamber is offered in described axle, the sidewall of described axle offers the second through hole with described second chamber, and described axle has the opening that can be communicated with described first chamber and described second chamber near the end opens of described first end; Described axle has first duty that described first through hole can be made to be connected with described second through hole with described first chamber, to stagger the second duty be communicated with making described first through hole and described second through hole.
In an embodiment, described body has the 3rd chamber with described first chamber, and described 3rd chamber is between described first chamber and described second end; The sidewall of described body offers the third through-hole with described 3rd chamber.
In an embodiment, offer passage along longitudinally, described passage and described 3rd chamber in described body sidewall, described 3rd chamber can be communicated with described power drilling tool; Described mandrel sidewall offers the fourth hole connecting described first chamber and described passage, and described fourth hole is between described second through hole and described opening.
In an embodiment, described axle is fixedly installed in described first chamber by the pin with predetermined shear strength; Along longitudinally, the size of described first chamber is greater than the size of described axle, and the distance between described second through hole and described fourth hole is greater than the size of described axle.
In an embodiment, described 3rd chamber is greater than the section area near described second end away from the section area of described second end.
In an embodiment, be provided with one way valve in described third through-hole, the liquid that described one way valve can limit in described 3rd chamber flows out.
In an embodiment, described one way valve comprises: can be jammed in the plug in described third through-hole, and described plug offers the fifth hole be communicated with described third through-hole; The valve ball on described fifth hole can be set; Spring, the solid described valve ball in top, one end of described spring, the other end and described body affixed.
By above technical scheme, the beneficial effects of the utility model are:
By offering the first through hole being communicated with described first chamber on the sidewall of described body, first chamber can be communicated with described tubing string, thus linked up described tubing string and described annular space, formation can for the flushing channel of cleaning fluid circulation, this flushing channel can change the flow direction of cleaning fluid, realize ground squeeze into cleaning fluid, down-hole cleaning tubing string, complete cleaning cleaning fluid on the object in ground return face, overcome that prior art wastes time and energy in the face of tubing string carries out cleaning on ground, complex procedures, affect the deficiency of construction progress, greatly improve cleaning efficiency.
In addition, the string cleaner of present embodiment can realize the down-hole cleaning of tubing string, therefore, enters other dirts and causes even if mix in tubing string when ground-mounted and again pollute, and also can clean pollutant again, ensure cleaning fully and effectively.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the Facad structure schematic diagram of the string cleaner of the utility model embodiment;
Fig. 2 is the structural representation when string cleaner shown in Fig. 1 is in the first duty;
Fig. 3 is the side structure schematic diagram of the string cleaner of the utility model embodiment;
Fig. 4 is the structural representation when string cleaner shown in Fig. 3 is in the second duty;
Fig. 5 is the structural representation of the one way valve of the utility model embodiment.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
In the description of the application; it will be appreciated that; term " on ", D score, " interior ", the indicating position such as " outward " or position relationship be based on the orientation shown in Figure of description or position; only the application and simplified characterization for convenience of description; instead of indicate or imply that the device of indication or parts must have specific orientation or position; or carry out constructing or operating with specific orientation or position, therefore can not be interpreted as the restriction to the application's protection domain.
Refer to Fig. 1 and Fig. 2.The string cleaner 100 that the application provides comprises: the body 1 that lengthwise extends, described body 1 have back to first end 10 and the second end 20, described first end 10 can be connected with tubing string 30, described tubing string 30 can provide transfer passage for drilling fluid, described second end 20 can be connected with mud motor 40, and described mud motor 40 can work under the hydraulic drive of drilling fluid.Be opened in the first chamber 11 in described body 1, described first chamber 11 is between described first end 10 and described second end 20, described first chamber 11 can be communicated with described tubing string 30, and the sidewall of described body 1 offers the first through hole 21 be communicated with described first chamber 11.
In present embodiment, body 1 can be cylindricality along its longitudinally, and the cross section of this cylindricality can be polygon, such as, can be quadrangle or hexagon, and now body 1 global shape is quadrangular or six prisms; The cross section of this cylindricality can also also be preferably circular, and now body 1 global shape is cylindric.Body 1 according to realistic well condition demand, can select suitable material.Such as, in order to meet down-hole hot conditions, the material require preparing body 1 meets certain intensity and Properties of High Temperature Creep; Under when entering in Oil/gas Well, body 1 may scratch with the sleeve pipe of Oil/gas Well or clash into, and in order to make to scratch or clash into the surface not damaging body 1, this material also should meet certain hardness requirement; Mud motor 40 may produce impact when operation repaiied by brill, and this material should meet certain toughness and the requirement of resistance to shock loads; May be there is corrosive liquid or gas in down-hole, this material should meet certain resistance to corrosion.Because Steel material plasticity is better, easily shape; Cost is low, is easy to get; Can be able to be such as that carburizing, modulation or Quenching Treatment improve its strong hardness, Properties of High Temperature Creep, toughness and resistance to shock loads performance through certain Technology for Heating Processing, and these techniques be simple to operation.Therefore, Steel material can meet above-mentioned needs substantially.In addition, can at the external surface coating anti-corrosion coating of steel body to meet requirement against corrosion.
The first end 10 of string cleaner 100 and the second end 20 can be provided with screw thread, are removably connected with tubing string 30 and mud motor 40 to realize string cleaner 100.For the ease of connecting, first end 10 and the shape of the second end 20 in installation position can adapt with tubing string 30 and mud motor 40, such as can offer the groove 101 of predetermined length on first end 10, the inwall of groove 101 arranges the internal thread that can screw mutually with external screw thread on tubing string 30; Second end 20 can be arranged to be roughly round table-like, concrete, as shown in Figure 1, the cross section of this second round table-like end 20 diminishes from top to bottom gradually, and the circumference with the second round table-like end 20 arranges the external screw thread that can screw mutually with the internal thread of mud motor 40.Certainly, tubing string 30 with mud motor 40 is arranged contrary with foregoing description for the screw thread be connected with the string cleaner 100 of the application's embodiment, the screw thread on first end 10 and the second end 20 also can adaptations.
Tubing string 30 can choose suitable existing structure according to actual requirement of engineering, and mud motor 40 includes but not limited to power drilling tool or other mud motors higher to the purity requirements of drilling fluid with metal stator.
First chamber 11 is mainly used in being communicated with tubing string 30, and the first through hole 21 by being communicated with it, by outside to body 1 for the liquid guide flow transported by tubing string 30, or by the liquid guide flow by body 1 outside in tubing string 30.First chamber 11 can be an airtight chamber between first end 10 and the second end 20, its internal chamber space and space outerpace is linked up by the first through hole 21 be communicated with it, can by arranging a through hole at first end 10 to be communicated with the first chamber 11 and tubing string 30.But be preferably the first chamber 11 apical grafting first end 10, be convenient to shaping of the first chamber 11 like this, such as can by the end face of the solid first end 10 in the drill bit top of boring bar tool carries out boring formation first chamber 11.The cross section of the first chamber 11 can be polygon, such as, can be quadrangle or hexagon; But preferably identical with runner 31 cross section of tubing string 30, such as, when the cross section of runner 31 is circular, the cross section of the first chamber 11 is the circle that radial dimension is identical with it; Along body 1 longitudinally, the first chamber 11 can be notch cuttype, also can be preferably straight hole shape.As above, cross section is circular and is shaped for the first chamber 11 of straight pass is convenient to time processing; First position of chamber 11 in body 1 preferably can align with runner 31.So, after first end 10 is connected with tubing string 30, the runner 31 of tubing string 30 simply can align with the first chamber 11 and be communicated with, and can obtain maximum area of passage.
The sidewall that first through hole 21 runs through body 1 is communicated with the first chamber 11.The cross section of the first through hole 21 can be polygon, such as, can be quadrangle or hexagon, is preferably circular.And in order to increase liquid communication area, the sidewall that can run through body 1 forms multiple first through hole 21, and the plurality of first through hole 21 can be uniformly distributed setting in the mode of annular array, when can make liquid overcurrent so comparatively evenly and steadily.
When utilizing the string cleaner 100 of present embodiment to carry out washing and cleaning operation, connect tubing string 30, string cleaner 100 and mud motor 40 successively, and three is lowered in the sleeve pipe 6 of Oil/gas Well.When string cleaner 100, tubing string 30 identically can such as be circle with the cross section of mud motor 40, the outside dimension of three is preferably identical, and so can form straight annular space 7 between three and sleeve pipe 6, annular space 7 is communicated with the first through hole 21.Certainly, cross section and the radial dimension of string cleaner 100, tubing string 30 and mud motor 40 are not limited to identical situation, three's shape of cross section and radial dimension can be chosen according to actual requirement of engineering, but the radial dimension of three all should be less than the internal diameter size of sleeve pipe 6, annular space 7 can be formed.Tubing string 30, first chamber 11, first through hole 21 be communicated with successively and annular space 7 are formed can for the flushing channel of cleaning fluid circulation, this flushing channel can change the flow direction of cleaning fluid, realize ground squeeze into cleaning fluid, down-hole cleaning tubing string, complete cleaning cleaning fluid on the object in ground return face.Concrete, refer to Fig. 2.Such as, cleaning fluid can be entered by annular space 7, enters tubing string 30 and cleans tubing string 30 successively through the first through hole 21, first chamber 11, and cleaning fluid and the impurity under cleaning finally can return discharge by tubing string 30.Cleaning fluid also can be entered by tubing string 30, and the cleaning fluid after cleaning tubing string 3 and the impurity under cleaning enter annular space 7 through the first chamber 11, first through hole 21 successively, and finally can return discharge by annular space 7.Certainly, the above-mentioned two kinds of cleaning ways provided can also hocket.
The string cleaner 100 of present embodiment by offering the first through hole 21 of connection first chamber 11 on the sidewall of body 1, first chamber 11 can be communicated with tubing string 30, thus linked up tubing string 30 and annular space 7, formation can for the flushing channel of cleaning fluid circulation, this flushing channel can change the flow direction of cleaning fluid, realize ground and squeeze into cleaning fluid, down-hole cleaning tubing string, the object in ground return face on the cleaning fluid completing cleaning, overcome prior art to waste time and energy in the face of tubing string carries out cleaning on ground, complex procedures, affect the deficiency of construction progress, greatly improve cleaning efficiency.
In addition, the string cleaner 100 of present embodiment can realize the down-hole cleaning of tubing string, therefore, enters other dirts and causes even if mix in tubing string when ground-mounted and again pollute, also can clean pollutant again, ensure cleaning fully and effectively.
In an embodiment, axle 2 is provided with in described first chamber 11, the second chamber 12 is offered in described axle 2, the sidewall of described axle 2 offers the second through hole 22 be communicated with described second chamber 12, and described axle 2 has the opening 3 that can be communicated with described first chamber 11 and described second chamber 12 near the end opens of described first end 10.Described axle 2 has first duty that described first through hole 21 can be made to be connected with described second through hole 22 with described first chamber 11, to stagger the second duty be communicated with making described first through hole 21 and described second through hole 22.
In present embodiment, the shape of axle 2 and the cavity shape of the first chamber 11 suitable, such as, when the first chamber 11 for cross section is the straight pass of polygon or circle, axle 2 is polygon prism or cylindric accordingly.Axle 2 according to realistic well condition demand, can select suitable material.The material selection of axle 2 requires to can refer to the above-mentioned description to body 1, does not repeat them here.In addition, sealing ring can be set between the outer wall of axle 2 and the inwall of the second chamber 12, to prevent fluid seepage.Concrete, such as can by offering conduit on the outer wall of axle 2, the mode arranging O-ring seals in conduit seals.
Second chamber 12 can be an airtight chamber, its internal chamber space and space outerpace is linked up by the second through hole 22 be communicated with it, and link up the first chamber 11 by opening 3, by the liquid guide flow in the first chamber 11 to its internal chamber space, or by liquid guide flow to the first chamber 11 in its internal chamber space.The cross section of the second chamber 12 can be polygon, such as, can be quadrangle or hexagon; But preferably identical with runner 31 cross section of tubing string 30, such as, when the cross section of runner 31 is circular, the cross section of the second chamber 12 is also circular.Along body 1 longitudinally, the second chamber 12 can be notch cuttype, also can be preferably straight hole shape, and as above, the second chamber 12 of straight pass is convenient to time processing and is shaped.
The sidewall that second through hole 22 runs through axle 2 is communicated with the second chamber 12.The cross section of the second through hole 22 can be polygon, such as, can be quadrangle or hexagon, is preferably circular.And in order to increase liquid communication area, the sidewall correspondence that can run through axle 2 forms multiple second through holes 22 identical with the first through hole 21 quantity; And, the plurality of second through hole 22 is uniformly distributed setting in the mode of the annular array identical with the first through hole 21, therefore, when axle 2 and the first chamber 11 are in the first duty, the plurality of second through hole 22 can be communicated with by identical with quantity multiple first through hole 21 one_to_one corresponding respectively, and when can make liquid overcurrent comparatively evenly and steadily.
Opening 3 may be used for communication first chamber 11 and the second chamber 12, and the liquid in two chambers can be flowed in intercommunication.When axle 2 and the first chamber 11 are in the first duty, the trench bottom of the groove 101 that opening 3 can be offered lower than first end 10; But it is concordant with the trench bottom of groove 10 to be preferably opening 3, so, liquid in tubing string 30 can directly enter in the second chamber 12 through opening 3, or the liquid in the second chamber 12 can directly enter in tubing string 30 through opening 3, thus can alleviate the sealing load between axle 2 and the first chamber 11.Opening 3 is preferably circular, and when the cross section of the second chamber 12 is circular, the radial dimension of circular opening 3 is preferably equal with the radial dimension of the second chamber 12, is convenient to shaping of the second chamber 12 like this.Such as can carry out boring formation second chamber 12 by an end of the solid axle 2 in the drill bit top of boring bar tool, the straight hole shape chamber that the second chamber 12 utilizing the method to be formed is cross section is circle, this cross section is that the second chamber 12 upper end of the straight hole shape of circle can be concordant with the trench bottom of groove 10.
In present embodiment, when axle 2 and the first chamber 11 are in the first duty, the first through hole 21 is connected with the second through hole 22.When opening 3 is concordant with the trench bottom of the groove 10 that first end 10 is offered, annular space 7, first through hole 21, second through hole 22, second chamber 12, opening 3 and the tubing string 30 that are communicated with successively are formed can for the flushing channel of cleaning fluid circulation, this flushing channel can change the flow direction of cleaning fluid, realize ground squeeze into cleaning fluid, down-hole cleaning tubing string, complete cleaning cleaning fluid on the object in ground return face.Concrete, refer to Fig. 2.Such as, cleaning fluid can be entered by annular space 7, enters tubing string 30 and cleans tubing string 30 successively through the first through hole 21, second through hole 22, second chamber 12, opening 3, and cleaning fluid and the impurity under cleaning finally can return discharge by tubing string 30.Cleaning fluid also can be entered by tubing string 30, successively through opening 3, second chamber 12, second through hole 22, first through hole 21 enters annular space 7 after cleaning to tubing string 3, and finally can return discharge by annular space 7.Certainly, the above-mentioned two kinds of cleaning ways provided can also hocket.
When completing the cleaning to tubing string 30, tubing string need be stopped to clean, when maybe needing to enter drilling and repairing well operation, when axle 2 and the first chamber 11 can be made to be in the second duty, now the first through hole 21 staggers with the second through hole 22 and is communicated with, for next step operation is prepared.Concrete, as shown in Figure 2, make the first through hole 21 and the second through hole 22 mode be communicated with that staggers can be along longitudinally, by the size being greater than axle 2 that the size of the first chamber 11 is arranged, axle 2 can move up and down in the first chamber 11, when axle 2 moves down certain distance, the first through hole 21 can be made to stagger with the second through hole 22 and to be communicated with.The application's embodiment, after completing tubing string cleaning, can carry out drilling and repairing well operation immediately, hereinafter will be described in detail.
Refer to Fig. 2, when being greater than the size of axle 2 along the size of longitudinally first chamber 11, the cleaning fluid meeting center roller 2 entered in the second chamber 12 applies the fluid power P to the second end 20
2, make axle 2 be subject to unidirectional force effect.This unidirectional force center roller 2 with the whole process of washing and cleaning operation causes continued extension effect, easily causes the damage of axle 2.Therefore, in order to compensate for this unidirectional force to reduce the infringement of its center roller 2, in an embodiment of the application, the 3rd chamber the 13, three chamber 13 that is communicated with the first chamber 11 can be offered in body 1 between the first chamber 11 and the second end 20; The sidewall of body 1 offers the third through-hole 23 be communicated with the 3rd chamber 13.
In present embodiment, the 3rd chamber 13 can be communicated with between the first chamber 11.Concrete, as shown in Figure 1, have between the first chamber 11 and the 3rd chamber 13 one for separate two chambers every platform 33, run through and offer one for being communicated with the duct 34 of the first chamber 11 and the 3rd chamber 13 every platform 33.Annular space 7, third through-hole 23, the 3rd chamber 13 are communicated with successively with the first chamber 11, form hydraulic resistance balance passage, cleaning fluid in annular space 7 enters in the 3rd chamber 13 through third through-hole 23, duct 34 can be used for the cleaning fluid in the 3rd chamber 13 to enter in the first chamber 11, more specifically, the cleaning fluid entering into the first chamber 11 through duct 34 is positioned at the bottom of axle 2, and this part cleaning fluid can produce and fluid power P by center roller 2
2reverse fluid power P
1, thus can to fluid power P
2compensate for, reduce the infringement of unidirectional force possibility center roller 2.
The sidewall that third through-hole 23 runs through body 1 is communicated with the 3rd chamber 13.The cross section of third through-hole 23 can be polygon, such as, can be quadrangle or hexagon, can also be preferably circular.And in order to increase liquid communication area, the sidewall that can run through body 1 forms multiple third through-hole 23; Further, the plurality of third through-hole 23 can be uniformly distributed setting in the mode of annular array, when can make liquid overcurrent so comparatively evenly and steadily.
Complete the cleaning to tubing string 30, need to proceed to drilling and repairing well operation.Refer to Fig. 3 and Fig. 4, some embodiment of the application is achieved in that the sidewall of described body 1 is interior and offers passage 14 along longitudinally, and described passage 14 is communicated with described 3rd chamber 13, and described 3rd chamber 13 can be communicated with described power drilling tool 40.The sidewall of described axle 2 offers the fourth hole 24 connecting described first chamber 11 and described passage 14, and described fourth hole 24 is between described second through hole 22 and described opening 3.In addition, described axle 1 is fixedly installed in described first chamber 11 by the pin 8 with predetermined shear strength.And along longitudinally, the size of described first chamber 11 is greater than the size of described axle 2, and the distance between described second through hole 22 and described fourth hole 24 is greater than the size of described axle 2.
In present embodiment, passage 14 can be parallel in the sidewall being arranged at body 1 of longitudinally, also can be that roughly direction is in the sidewall being arranged at body 1 of longitudinally, as long as it can be communicated with the 3rd chamber 13, and the sidewall not running through body 1 be communicated with the space outerpace of body 1.The cross section of passage 14 can be polygon, such as, can be quadrangle or hexagon, can also be preferably circular; And along longitudinally, passage 14 can be straight pass, also can be notch cuttype.And in order to increase liquid communication area, can multiple passage 14 be set in the sidewall of body 1, and the plurality of passage 14 can be uniformly distributed setting in the mode of annular array, when can make drilling fluid overcurrent so comparatively evenly and steadily.In addition, it is to be understood that passage 14 is the inside of the sidewall being opened in body 1, with the first through hole 21, second through hole 22 and third through-hole 23 unlike, passage 14 does not run through the sidewall of body 1.
Fourth hole 24 is for linking up the first chamber 11 and passage 14.The cross section of fourth hole 24 can be polygon, such as, can be quadrangle or hexagon, can also be preferably circular.And in order to increase liquid communication area, the multiple fourth holes 24 identical with passage 14 quantity can be set, and, the plurality of fourth hole 24 is uniformly distributed setting in the mode of the annular array identical with passage 14, so, multiple passages 14 one_to_one corresponding that the plurality of fourth hole 24 can be identical with quantity is respectively communicated with; And comparatively evenly with steady when can make liquid overcurrent.
One end on pin 8 can be provided with screw thread, and the sidewall of body 1 is offered the hole can passed for pin 8 accordingly, the aperture in this hole suitably can be greater than the external diameter of pin 8, or this hole also can be provided with the internal thread that can screw mutually with the screw thread on pin 8; Correspondingly on the sidewall of axle 2 offer blind hole, the internal thread that can screw mutually with the screw thread on pin 8 in this blind hole, can be provided with.So, by pin 8, axle 2 is fixed in the first chamber 11, is in the first duty to make axle 2 and the first chamber 11.
Along longitudinally, the size of the first chamber 11 is greater than the size of axle 2.Concrete, as Fig. 2, along the vertical direction, the length dimension of the first chamber 11 is greater than the length dimension of axle.Therefore, when making the pin 8 with predetermined shear strength be cut off under the effect in external force, axle 2 can move down in the first chamber 11.
Along longitudinally, the distance between the second through hole 22 and fourth hole 24 is greater than the size of axle 2, concrete, and as shown in Figure 2, along the vertical direction, the distance between the second through hole 22 and fourth hole 24 is greater than the length dimension of axle 2.Fourth hole 24 is between the second through hole 22 and opening 3, concrete, and as shown in Figure 2, fourth hole 24 is positioned at the top of the second through hole 22.Therefore, when axle 2 and the first chamber 11 are in the first duty, first through hole 21 is communicated with the second through hole 22, fourth hole 24 is blocked by axle 2, and owing to sealing between axle 2 and the first chamber 11 inwall, therefore can ensure that the cleaning fluid of tubing string 30 can enter annular space 7 through the second through hole 22 and the first through hole 21 successively, or the cleaning fluid in annular space 7 can enter tubing string 30 through the first through hole 21 and the second through hole 22 successively, to carry out washing and cleaning operation, and cleaning fluid can not be made to flow out through fourth hole 24.
In present embodiment, complete the cleaning of tubing string, when need carry out drilling and repairing well operation, pitching 9 can be entered 30 times by tubing string, pitching 9 sets on the opening 3 of axle 2, and the contact surface that opening 3 and pitching 9 are located can be arranged to the indent arc-shaped that pitching 9 agrees with mutually, and function class is like ball seat.So, pitching 9 sets on opening 3, thus can to the lower space of tubing string 30 as the first chamber 11 and the second chamber 12 form seal pack.In tubing string 30, suppress drilling fluid, the fluid power of drilling fluid acts on pin 8 by pitching 9; When the fluid power of drilling fluid continues to increase to the shear strength exceeding pin 8, pin 8 is cut off, and axle 2 moves to the second end 20 direction in the first chamber 11, until support the interior bottom of solid first chamber 11.First through hole 21 and the second through hole 22 stagger, and namely now axle 2 and the first chamber 11 are in the second duty.And due to along longitudinally, distance between second through hole 22 and fourth hole 24 is greater than the size of axle 2, therefore when axle 2 moves to bottom in solid first chamber 11, axle 2 removes blocking fourth hole 24, thus fourth hole 24 is communicated with the first chamber 11, and then link up the first chamber 11 and the 3rd chamber 13, the drilling fluid entering into the first chamber 11 through tubing string 30 arrives the 3rd chamber 13 through passage 14, and finally enter the mud motor 40 be communicated with the 3rd chamber 13, provide driving fluid power for it carries out the brill work of repairing.
The cross section of the 3rd chamber 13 can be polygon, such as, can be quadrangle or hexagon, can also be preferably circular; And along longitudinally, the 3rd chamber 13 can be straight pass, but be preferably the notch cuttype being greater than the section area near the second end 20 away from the section area of the second end 20, concrete, up big and down small notch cuttype as shown in Figure 2.So, according to flow law of conservation, the flow velocity of drilling fluid can be increased by the area of passage reducing drilling fluid, and then reach the flow velocity that improves and enter the drilling fluid of mud motor 40 to increase the rotating speed of mud motor 40, promote the object that efficiency repaiied by brill.
After utilizing the string cleaner 100 of present embodiment to complete washing and cleaning operation, when needing to proceed to drilling and repairing well operation, the lower space transferring pitching 9 pairs of tubing strings 30 carries out seal pack, the fluid power of drilling fluid acts on pin 8 by pitching 9 and is cut off, enter drilling fluid in the first chamber 11 under the communication of passage 14, enter the 3rd chamber 13, and finally enter mud motor 40, thus realize the quick joining of tubing string cleaning, drilling and repairing well, shorten construction period, increase work efficiency.
In addition, the hydraulic resistance balance passage that the annular space 7 of cleaning fluid through being communicated with successively, third through-hole 23, the 3rd chamber 13 are formed finally enters into the 3rd chamber 13 institute and to produce and fluid power P
2reverse fluid power P
1act in axle 2, thus can to fluid power P
2compensate for, fluid power P can be reduced
1to the shear action of pin 8, prevent pin 8 from being cut off in advance and cause the cleaning of tubing string 30 insufficient.
In an embodiment, be provided with one way valve 5 in described third through-hole 23, the liquid that described one way valve 5 can limit in described 3rd chamber 13 flows out.When needs by hydraulic resistance balance passage to fluid power P
2when compensating for, the one way valve 5 be arranged in third through-hole 23 can prevent the cleaning fluid backflow having entered into the 3rd chamber 13, thus ensures that can there be the fluid power of suitably enough pressure the lower end of axle 2.In addition, when carrying out drilling and repairing well operation, one way valve 5 can also prevent from entering drilling liquid flow in the 3rd chamber 13 in annular space 7, ensures that the fluid power of drilling fluid is not suffered a loss.
Refer to Fig. 5, in a preferred embodiment, described one way valve 5 comprises: can be jammed in the plug 51 in described third through-hole 23, and described plug 51 offers the fifth hole 25 be communicated with described third through-hole 23; Can set the valve ball 52 on described fifth hole 25, the contact surface that fifth hole 25 and valve ball 52 are located can be arranged to valve ball 52 to the indent arc-shaped of agreeing with, and function class like ball seat, thus can ensure sealing effectiveness preferably; All the time be in the spring 53 of compressive state, the solid described valve ball 52 in top, one end of described spring 53, the other end and described body 1 affixed.When the pressure acted on valve ball 52 of the cleaning fluid in annular space 7 be greater than spring 53 put on the bias voltage of valve ball 52 time, valve ball 52 depart from contact with setting of fifth hole 25, cleaning fluid can enter in the 3rd chamber 13; When the Pressure Drop acted on valve ball 52 of the cleaning fluid in annular space 7 be low to moderate be less than spring 53 put on the bias voltage of valve ball 52 time, valve ball 52 is biased on fifth hole 25 by spring 53, thus make to be isolated between annular space 7 and the 3rd chamber 13, prevent the cleaning fluid in the 3rd chamber 13 to be back in annular space 7.In addition, when carrying out drilling and repairing well operation, the drilling fluid entering into the 3rd chamber 13 has certain hydraulic coupling, and the hydraulic coupling of drilling fluid can act on valve ball 52.Under the hydraulic coupling of drilling fluid and the acting in conjunction of spring 53 bias voltage, what valve ball 52 can be good sets on fifth hole 25, prevents drilling liquid flow in the 3rd chamber 13 in annular space 7, thus can ensure that the fluid power of drilling fluid is not suffered a loss.
In addition, in washing and cleaning operation process, in order to prevent the cleaning fluid in annular space 7 from entering shaft bottom, in the below of one way valve 5, packing is carried out to annular space 7, such as, sliding sleeve switch the latter packer can be adopted to carry out packing to annular space 7.Be prior art owing to carrying out packing to annular space 7 and more easily realize, not repeating them here.
These are only several embodiment of the present utility model, those skilled in the art can carry out various change or modification to the utility model embodiment according to content disclosed in application documents and not depart from spirit and scope of the present utility model.
Claims (8)
1. string cleaner, is characterized in that, it comprises:
Lengthwise extend body, described body have back to first end and the second end, described first end can be connected with tubing string, and described second end can be connected with mud motor;
Be opened in the first chamber in described body, described first chamber is between described first end and described second end, and described first chamber can be communicated with described tubing string, and the sidewall of described body offers the first through hole with described first chamber.
2. device as claimed in claim 1, is characterized in that:
Axle is provided with in described first chamber, the second chamber is offered in described axle, the sidewall of described axle offers the second through hole with described second chamber, and described axle has the opening that can be communicated with described first chamber and described second chamber near the end opens of described first end;
Described axle has first duty that described first through hole can be made to be connected with described second through hole with described first chamber, to stagger the second duty be communicated with making described first through hole and described second through hole.
3. device as claimed in claim 2, is characterized in that:
Described body has the 3rd chamber with described first chamber, and described 3rd chamber is between described first chamber and described second end;
The sidewall of described body offers the third through-hole with described 3rd chamber.
4. device as claimed in claim 3, is characterized in that:
Offer passage along longitudinally, described passage and described 3rd chamber in described body sidewall, described 3rd chamber can be communicated with described power drilling tool;
Described mandrel sidewall offers the fourth hole connecting described first chamber and described passage, and described fourth hole is between described second through hole and described opening.
5. device as claimed in claim 4, is characterized in that:
Described axle is fixedly installed in described first chamber by the pin with predetermined shear strength;
Along longitudinally, the size of described first chamber is greater than the size of described axle, and the distance between described second through hole and described fourth hole is greater than the size of described axle.
6. the device as described in claim 4 or 5, is characterized in that: described 3rd chamber is greater than the section area near described second end away from the section area of described second end.
7. device as claimed in claim 6, is characterized in that: be provided with one way valve in described third through-hole, and the liquid that described one way valve can limit in described 3rd chamber flows out.
8. device as claimed in claim 7, it is characterized in that, described one way valve comprises:
Can be jammed in the plug in described third through-hole, described plug offers the fifth hole be communicated with described third through-hole;
The valve ball on described fifth hole can be set;
Spring, the solid described valve ball in top, one end of described spring, the other end and described body affixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520627410.9U CN204941397U (en) | 2015-08-19 | 2015-08-19 | String cleaner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520627410.9U CN204941397U (en) | 2015-08-19 | 2015-08-19 | String cleaner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204941397U true CN204941397U (en) | 2016-01-06 |
Family
ID=55008838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520627410.9U Withdrawn - After Issue CN204941397U (en) | 2015-08-19 | 2015-08-19 | String cleaner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204941397U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114016A (en) * | 2015-08-19 | 2015-12-02 | 中国石油天然气集团公司 | Tubular column cleaning device |
-
2015
- 2015-08-19 CN CN201520627410.9U patent/CN204941397U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114016A (en) * | 2015-08-19 | 2015-12-02 | 中国石油天然气集团公司 | Tubular column cleaning device |
| CN105114016B (en) * | 2015-08-19 | 2017-12-05 | 中国石油天然气集团公司 | String cleaner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160106 Effective date of abandoning: 20171205 |