CN201574731U - Combined type pipe string with functions of perforation, fracturing and non-well-killing pumping of oil wells - Google Patents
Combined type pipe string with functions of perforation, fracturing and non-well-killing pumping of oil wells Download PDFInfo
- Publication number
- CN201574731U CN201574731U CN2009202773475U CN200920277347U CN201574731U CN 201574731 U CN201574731 U CN 201574731U CN 2009202773475 U CN2009202773475 U CN 2009202773475U CN 200920277347 U CN200920277347 U CN 200920277347U CN 201574731 U CN201574731 U CN 201574731U
- Authority
- CN
- China
- Prior art keywords
- sleeve
- screw
- sliding sleeve
- core bar
- thread
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Abstract
The utility model relates to the technical field of combined type devices with the functions of perforation, fracturing and non-well-killing pumping of oil wells for the commissioning and return of oilfields, in particular to a combined type pipe string with the functions of perforation, fracturing and non-well-killing pumping of oil wells. The pipe string comprises a perforation gun, an oil pipe pup joint, a special perforation sand blower, a depth correction pup joint, a stopper adapting cylinder, a stopper working cylinder, a rod pump working cylinder, a stopper rod capable of working with the stopper working cylinder to close an oil pipe channel, and a rod pump plunger capable of being fixedly connected at the lower end of a pumping rod and working with the rod pump working cylinder for oil pumping. The utility model with reasonable and compact structure and convenient use can fulfill perforation, fracturing, non-well-killing pumping and other operations through one-time running of the pipe string, effectively protect the oil layer and a casing pipe, prevent the second pollution of the oil layer and the washout damage of the casing pipe due to the fracturing construction, and realize non-well-killing pump descending, thereby shortening the commissioning period of a new well, saving operation costs, and achieving the characteristics of safety, labor conservation, simplicity, convenience, high efficiency, economization and environmental friendliness.
Description
One, technical field
The utility model relate to the oil field be used to go into operation, on oil well perforation, pressure break, the not kill-job returned change and take out the device technique field that connection is done, be that a kind of not kill-job of oil well perforation, fracturing is changeed and taken out connection and make tubing string.
Two, background technology
Present existing perforating oil gas well, pressure break, commentaries on classics are smoked technology and are separated, and want to finish above-mentioned three technologies, usually need be connected through washing operations such as kill-job, lower tubular column, and three casing strings carry out to need promptly to adopt that perforation, pressure break, commentaries on classics are taken out etc.So both had security risk, efficient is low, expense is high but also may bring secondary pollution problems to reservoir.
Three, summary of the invention
The utility model provides a kind of not kill-job of oil well perforation, fracturing to change to take out connection makes tubing string, its solved existing perforating oil gas well, pressure break, commentaries on classics take out technology because of complex process bring have security risk, efficiency of construction is low, operating cost is high, easily cause the reservoir secondary pollution problem.
The technical solution of the utility model realizes by following measure: a kind of not kill-job of oil well perforation, fracturing commentaries on classics is taken out connection and is made tubing string, comprise that the special-purpose sandblaster of perforating gun, tubing nipple, perforation, the dark pipe nipple in school, blanking plug accept tube, blanking plug seating nipple and insert pump seating nipple, also comprise to be used with the blanking plug seating nipple and to close the bott stick of oil pipe passage, and can be fixedly connected on the lower end of sucker rod and be used the insert pump plunger of oil pumping with the insert pump seating nipple; The upper end of perforating gun and the lower end of tubing nipple are fixedly installed togather, the lower end of the special-purpose sandblaster of the upper end of tubing nipple and perforation is fixedly installed togather, the upper end of the special-purpose sandblaster of perforation is fixedly installed togather by the lower end of the dark pipe nipple of oil pipe and school, the lower end that the upper end of the dark pipe nipple in school and blanking plug are accepted tube is fixedly installed togather, the lower end of upper end by oil pipe and blanking plug seating nipple that blanking plug is accepted tube is fixedly installed togather, and the lower end of the upper end of blanking plug seating nipple and insert pump seating nipple is fixedly installed togather.
Be further optimization and/or improvements below to above-mentioned utility model technical scheme:
The special-purpose sandblaster of above-mentioned perforation can comprise central tube and sheath; Last connecting thread is arranged at the top of central tube, following connecting thread is arranged at the bottom of central tube, there is sheath at the middle part of central tube, the upper end and the central tube of sheath are fixed together, the lower end of sheath and central tube have the annular space that is connected with the tube chamber of sheath between the outside, there is spray hole the position at corresponding sheath middle part on the central tube, and the tube chamber of central tube is connected with the tube chamber of sheath by spray hole.
The sandblast top connection can be arranged at the top of above-mentioned central tube, the top connection screw thread is arranged at the top of sandblast top connection, the lower contact screw thread that matches with the last connecting thread of central tube is arranged at the bottom of sandblast top connection, and the bottom of sandblast top connection and the top of central tube are fixed together by lower contact screw thread and last connecting thread and keep sealing; There is screwed hole the upper end of sheath, there is the sheath retaining thread in the outside, middle part of central tube, sheath is fixedly mounted on the middle part of central tube by screwed hole and sheath retaining thread, be fixed with bushing pipe on the lumen wall of sheath, there is annular slot in the central tube outside of sheath retaining thread upper end, be equipped with in the annular slot and can limit the snap ring that moves on the sheath, the lower surface of snap ring holds out against on the upper surface of sheath, on the jacket inner wall of screwed hole lower end annular groove is arranged, on the position of the corresponding annular groove in the outside, central tube middle part annular boss is arranged, the upper surface of annular boss holds out against on the upper surface of annular groove, and there is the sheath seal groove that is no less than in the outside, the middle part of annular boss and sealing ring is installed; Spray hole is the slotted hole or the slotted eye of above-below direction, and the upper end of spray hole is lower than the lower end of screwed hole, and the lower end of spray hole is higher than the upper end of annular space.
Above-mentioned blanking plug is accepted tube and can be comprised cylinder sleeve, accepts top connection, accepts lower contact and accept ring; The top and bottom of cylinder sleeve are fixedly connected with respectively to accept top connection and accept lower contact and also can keep sealing in the junction, the inside of accepting top connection and accepting lower contact have respectively tube chamber and with the intracavity inter-connection of cylinder sleeve, be equipped with in the inner chamber of cylinder sleeve and accept ring, the lower surface of accepting ring is sitting on the upper surface of accepting lower contact.
The upper and lower of above-mentioned cylinder sleeve can have respectively go up to connect internal thread with under be connected internal thread, the top of accepting top connection has top connection that screw thread is installed, the bottom of accepting top connection have can with on be connected the top connection external screw thread that internal thread matches, the top of accepting lower contact has and can be connected the lower contact external screw thread that internal thread matches with following, and the bottom of accepting lower contact has lower contact that screw thread is installed; Accept top connection and be fixedly mounted on the cylinder sleeve by last connection internal thread and top connection external screw thread, accept lower contact by under connect internal thread and the lower contact external screw thread is fixedly mounted on the cylinder sleeve; Accept to be uniformly distributed with along the circumference on the inwall of ring and be no less than three projection, the upper end of accepting ring is up-small and down-big boss; Accept top connection and be positioned at the externally threaded upper end position of top connection and have and be no less than one groove and sealing ring is installed, accept lower contact and be positioned at the externally threaded lower end position of lower contact and be equipped with and be no less than one groove and lower seal is installed.
Above-mentioned blanking plug seating nipple can comprise upper bush, lower sleeve and sliding sleeve; Have on the upper end of upper bush to go up screw thread is installed, have on the lower end of lower sleeve screw thread is installed down, it is the annular boss of the up big and down small conical surface that the upper surface is arranged on the upper tube cavity wall of upper bush, and sliding sleeve is installed on the lumen wall of lower sleeve and can falls because of cutting off from the lower ending opening of lower sleeve of shear screw by shear screw; Connecting thread in the sleeve is arranged at the bottom of upper bush, and the outer connecting thread of sleeve is arranged at the top of lower sleeve, and upper bush and lower sleeve are fixed together by connecting thread in the sleeve and the outer connecting thread of sleeve, and the tube chamber of upper bush and the tube chamber of lower sleeve are connected; On the lower sleeve upper tube cavity wall annular stop boss is arranged, the outside, upper end of sliding sleeve holds out against on the lower surface of annular stop boss, and there is the up big and down small sliding sleeve conical surface at the tube chamber upper end open place of sliding sleeve; Sleeve shear pin screw is arranged on the lower sleeve, and there is sliding sleeve shear pin hole the position of the corresponding sleeve shear pin screw in the sliding sleeve outside, and the outer end of shear screw is installed in the sleeve shear pin screw, and the inner of shear screw is installed in the sliding sleeve shear pin hole.
Above-mentioned bott stick can comprise switch core bar, following switch core bar and monodirectional locking device; The lock dog groove is arranged at the bottom of last switch core bar, be equipped with in the lock dog groove and can be stuck on the annular boss lower surface to place restrictions on the monodirectional locking device that moves on switch core bar and the following switch core bar, there is the annular round platform that can be sitting in the sliding sleeve upper end in the outside, lower end of last switch core bar, there is the up big and down small core bar conical surface that can match with the sliding sleeve conical surface lower end of annular round platform, the bottom center of last switch core bar has the core bar that is connected with the lock dog groove to be connected screw, the top of following switch core bar has lower beam to connect double-screw bolt, the upper end that lower beam connects double-screw bolt is up-small and down-big lower beam taper seat, there is following core bar boss in the outside, bottom of following switch core bar to the position that the sliding sleeve bottom should be arranged and can be sleeved in the tube chamber of sliding sleeve by following core bar boss, the outside of following core bar boss has and is no less than one following core bar seal groove and sealing ring is installed, and last switch core bar and following switch core bar are connected screw by core bar and are connected double-screw bolt with lower beam and are fixed together; The monodirectional locking device comprises left lock dog, right lock dog, steady pin and torque spring, the middle part of left side lock dog and right lock dog is hinged on the last switch core bar at lock dog groove middle part by steady pin, the upper end that can make left lock dog and the right lock dog torque spring away from last switch core bar axis is installed between a left side lock dog and the right lock dog, the middle part of torque spring is sleeved on the steady pin, the left end of torque spring is fixedly mounted on the left lock dog, and the right-hand member of torque spring is fixedly mounted on the right lock dog; The outside, upper end of left side lock dog and right lock dog extend out to the outside of switch core bar by the lock dog groove and can be pressed on the lumen wall of upper bush, and the inboard, lower end of left lock dog and right lock dog is pressed on respectively on the lower beam taper seat.
Can there be anti-turn screw the junction of above-mentioned upper bush and lower sleeve, on the upper bush of connecting thread below the anti-rotation screw is arranged in the sleeve, there is lock hole the position of corresponding anti-rotation screw on the lower sleeve, and the outer end of anti-turn screw is installed in the anti-rotation screw, and the inner of anti-turn screw is installed in the lock hole; The sleeve seal groove that is no less than one can be arranged and sealing ring is installed on the upper bush lumen wall of connecting thread top in the sleeve, can there be the sliding sleeve seal groove that is no less than in the outside of sliding sleeve and sealing ring is installed.
The utility model reasonable and compact in structure; easy to use; only can finish perforation, pressure break, not kill-job and change and multi-mode operation such as take out by being lowered to tubing string; can effectively protect oil reservoir to prevent that the secondary pollution of oil reservoir and protective casing from preventing the erosion damage of pressing crack construction to sleeve pipe; can also realize not pressing down-hole pump; thereby shorten the cycle that brings in a well, save operating cost, have the characteristics of safety labor-saving, simple and effective, economic environmental protection.
Four, description of drawings
Accompanying drawing 1 is looked the sectional structure simplified schematic diagram for the master of the utility model most preferred embodiment.
Master when accompanying drawing 2 is in the pressure break duty for the utility model looks the sectional structure simplified schematic diagram.
Master when accompanying drawing 3 is in insert pump under the not kill-job state for the utility model looks the sectional structure simplified schematic diagram.
Master when accompanying drawing 4 is opened oil pipe production channel status for the utility model is in looks the sectional structure simplified schematic diagram.
Master when accompanying drawing 5 is in the oil pumping state for the utility model looks the sectional structure simplified schematic diagram.
Accompanying drawing 6 partly cuts open the structure for amplifying schematic diagram for the master of the special-purpose sandblaster of the perforation in the accompanying drawing 1 looks.
The master that accompanying drawing 7 is accepted tube for the blanking plug in the accompanying drawing 1 looks and partly cuts open the structure for amplifying schematic diagram.
Accompanying drawing 9 is looked broken section structure for amplifying schematic diagram for the blanking plug seating nipple in the accompanying drawing 1 with master after bott stick matches.
Coding in the accompanying drawing is respectively: 1 is perforating gun, and 2 is tubing nipple, and 3 is the special-purpose sandblaster of perforation, 4 is the dark pipe nipple in school, and 5 accept tube for blanking plug, and 6 is the blanking plug seating nipple, 7 is the insert pump seating nipple, 8 is bott stick, and 9 is sucker rod, and 10 is the insert pump plunger, 11 is central tube, 12 is sheath, and 13 is last connecting thread, and 14 are following connecting thread, 15 is annular space, 16 is spray hole, and 17 are the sandblast top connection, and 18 are the top connection screw thread, 19 are the lower contact screw thread, 20 is screwed hole, and 21 is the sheath retaining thread, and 22 is bushing pipe, 23 is annular slot, 24 is snap ring, and 25 is annular groove, and 26 is annular boss, 27 is the sheath seal groove, 28 is cylinder sleeve, and 29 for accepting top connection, and 30 for accepting lower contact, 31 for accepting ring, 32 is last connection internal thread, and 33 for connecting internal thread down, and 34 are top connection installation screw thread, 35 are the top connection external screw thread, 36 are the lower contact external screw thread, and 37 are lower contact installation screw thread, and 38 is projection, 39 is boss, 40 is last sealing ring, and 41 is lower seal, and 42 is upper bush, 43 is lower sleeve, 44 is sliding sleeve, and 45 is last installation screw thread, and 46 for installing screw thread down, 47 is annular boss, 48 is shear screw, and 49 is connecting thread in the sleeve, and 50 is the outer connecting thread of sleeve, 51 is the annular stop boss, 52 is the sliding sleeve conical surface, and 53 is sleeve shear pin screw, and 54 is sliding sleeve shear pin hole, 55 is last switch core bar, 56 are following switch core bar, and 57 is the lock dog groove, and 58 is annular round platform, 59 is the core bar conical surface, 60 for core bar connects screw, and 61 for lower beam connects double-screw bolt, and 62 is the lower beam taper seat, 63 are following core bar boss, 64 are following core bar seal groove, and 65 is left lock dog, and 66 is right lock dog, 67 is steady pin, 68 is torque spring, and 69 is anti-turn screw, and 70 is the anti-rotation screw, 71 is lock hole, 72 is the sleeve seal groove, and 73 is the sliding sleeve seal groove, and H is a upper lifting pipe post height.
Five, the specific embodiment
The utility model is not subjected to the restriction of following embodiment, can determine concrete embodiment according to the technical solution of the utility model and actual conditions.
Below in conjunction with most preferred embodiment and accompanying drawing the utility model is further described:
Shown in accompanying drawing 1,2,3,4,5, this not kill-job of oil well perforation, fracturing is changeed and is taken out connection and comprise that as tubing string perforating gun 1, tubing nipple 2, the special-purpose sandblaster 3 of perforation, the dark pipe nipple 4 in school, blanking plug accept tube 5, blanking plug seating nipple 6 and insert pump seating nipple 7, also comprise to be used with blanking plug seating nipple 6 and to close the bott stick 8 of oil pipe passage, and can be fixedly connected on the lower end of sucker rod 9 and be used the insert pump plunger 10 of oil pumping with insert pump seating nipple 7; The lower end of the upper end of perforating gun 1 and tubing nipple 2 is fixedly installed togather, the lower end of the special-purpose sandblaster 3 of the upper end of tubing nipple 2 and perforation is fixedly installed togather, the upper end of the special-purpose sandblaster 3 of perforation is fixedly installed togather by the lower end of the dark pipe nipple 4 of oil pipe and school, the lower end that the upper end of the dark pipe nipple 4 in school and blanking plug are accepted tube 5 is fixedly installed togather, blanking plug is accepted the lower end of tube 5 upper end by oil pipe and blanking plug seating nipple 6 and is fixedly installed togather, and the lower end of the upper end of blanking plug seating nipple 6 and insert pump seating nipple 7 is fixedly installed togather.Like this, only can finish perforation, pressure break, not kill-job and change and multi-mode operation such as take out by being lowered to tubing string, can carry out perforating job by perforating gun 1, can carry out fracturing work by the special-purpose sandblaster 3 of perforation, can form blanking plug by bott stick 8 and 6 cooperations of blanking plug seating nipple, insert pump plunger 10 and insert pump seating nipple 7 cooperate can form insert pump, takes out operation thereby carry out not kill-job commentaries on classics.
Can connection be taken out in above-mentioned not kill-job of oil well perforation, fracturing commentaries on classics made further optimization and/or improvements according to actual needs as tubing string:
As shown in Figure 6, the special-purpose sandblaster 3 of perforation comprises central tube 11 and sheath 12; Last connecting thread 13 is arranged at the top of central tube 11, following connecting thread 14 is arranged at the bottom of central tube 11, there is sheath 12 at the middle part of central tube 11, the upper end of sheath 12 and central tube 11 are fixed together, between the lower end of sheath 12 and central tube 11 outsides annular space 15 that is connected with the tube chamber of sheath 12 is arranged, there is spray hole 16 position at corresponding sheath 12 middle parts on the central tube 11, and the tube chamber of central tube 11 is connected by the tube chamber of spray hole 16 with sheath 12.Fracturing fluid and fracturing sand enter the tube chamber of sheath 12 in the tube chamber of central tube 11 by spray hole 16; flow down by annular space 15 at last; so just avoided fracturing fluid and fracturing sand directly to impact on production string, thereby protected production string and prolonged its application life.
As shown in Figure 6, sandblast top connection 17 is arranged at the top of central tube 11, top connection screw thread 18 is arranged at the top of sandblast top connection 17, the lower contact screw thread 19 that matches with the last connecting thread 13 of central tube 11 is arranged at the bottom of sandblast top connection 17, and the top of the bottom of sandblast top connection 17 and central tube 11 is fixed together by lower contact screw thread 19 and last connecting thread 13 and keeps sealing; There is screwed hole 20 upper end of sheath 12, there is sheath retaining thread 21 in the outside, middle part of central tube 11, sheath 12 is fixedly mounted on the middle part of central tube 11 by screwed hole 20 and sheath retaining thread 21, be fixed with bushing pipe 22 on the lumen wall of sheath 12, there is annular slot 23 in central tube 11 outsides of sheath retaining thread 21 upper ends, be equipped with in the annular slot 23 and can limit the snap ring 24 that moves on the sheath 12, the lower surface of snap ring 24 holds out against on the upper surface of sheath 12, on sheath 12 inwalls of screwed hole 20 lower ends annular groove 25 is arranged, on the position of the corresponding annular groove 25 in the outside, central tube 11 middle parts annular boss 26 is arranged, the upper surface of annular boss 26 holds out against on the upper surface of annular groove 25, and there is the sheath seal groove 27 that is no less than in the outside, the middle part of annular boss 26 and sealing ring is installed; Spray hole 16 is the slotted hole or the slotted eye of above-below direction, and the upper end of spray hole 16 is lower than the lower end of screwed hole 20, and the lower end of spray hole 16 is higher than the upper end of annular space 15.By sandblast top connection 17 the special-purpose sandblaster 3 of perforation is linked together more easily with the pipe fitting of top, sheath 12 is fixedly mounted on by screw thread is convenient to maintenance and replacing more on the central tube 11, bushing pipe 22 preferably adopts high-abrasive material to make and adopt the mode and the sheath 12 of spraying or welding to be fixed together, can prolong the application life of sheath 12, snap ring 24 and annular boss 26 can prevent that sheath 2 from getting loose because of the rotation of reasons such as shock and vibration.In addition, can also spray hole 16 be increased by increasing the length of central tube 11 and sheath 12, thus the velocity of discharge of quickening fracturing fluid and fracturing sand.
Shown in accompanying drawing 7,8, blanking plug is accepted tube 5 and is comprised cylinder sleeve 28, accepts top connection 29, accepts lower contact 30 and accept ring 31; The top and bottom of cylinder sleeve 28 are fixedly connected with respectively to accept top connection 29 and accept lower contact 30 and also can keep sealing in the junction, the inside of accepting top connection 29 and accepting lower contact 30 have respectively tube chamber and with the intracavity inter-connection of cylinder sleeve 28, be equipped with in the inner chamber of cylinder sleeve 28 and accept ring 31, the lower surface of accepting ring 31 is sitting on the upper surface of accepting lower contact 30.Accept bott stick 8 by accepting ring 31, can increase oil pipe fluid course area, thereby improve oil well pump efficient.
Shown in accompanying drawing 7,8, the upper and lower of cylinder sleeve 28 have respectively go up to connect internal thread 32 with under be connected internal thread 33, the top of accepting top connection 29 has top connection that screw thread 34 is installed, the bottom of accepting top connection 29 have can with on be connected the top connection external screw thread 35 that internal thread 32 matches, the top of accepting lower contact 30 has and can be connected the lower contact external screw thread 36 that internal thread 33 matches with following, and the bottom of accepting lower contact 30 has lower contact that screw thread 37 is installed; Accept top connection 29 and be fixedly mounted on the cylinder sleeve 28 by last connection internal thread 32 and top connection external screw thread 35, accept lower contact 30 by under connect internal thread 33 and lower contact external screw thread 36 is fixedly mounted on the cylinder sleeve 28; Accept on ring 31 the inwall and be uniformly distributed with the projection 38 that is no less than three along the circumference, the upper end of accepting ring 31 is up-small and down-big boss 39; Accepting upper end position that top connection 29 is positioned at top connection external screw thread 35 has and is no less than one groove and sealing ring 40 is installed, and accepts lower end position that lower contact 30 is positioned at lower contact external screw thread 36 and is equipped with and is no less than one groove and lower seal 41 is installed.By top connection screw thread 34 and lower contact being installed installs screw thread 37 and blanking plug can be accepted the oil pipe etc. of tube 5 and top and the bottom and link together.Accept top connection 29 with accept lower contact 30 by on be connected internal thread 32, top connection external screw thread 35, connect internal thread 33 down and lower contact external screw thread 36 is fixed together with cylinder sleeve 28, the junction promptly firmly is convenient to the dismounting maintenance again.Also can will accept top connection 29, accept lower contact 30 and cylinder sleeve 28 and be welded together and make the junction guarantee sealing.The outside, lower end that projection 38 and boss 39 can block bott stick 8 stops it to fall, and makes the fluid course area of oil pipe reach maximum as far as possible simultaneously again.Last sealing ring 40 and lower seal 41 can guarantee the sealing of junction.
As shown in Figure 9, blanking plug seating nipple 6 comprises upper bush 42, lower sleeve 43 and sliding sleeve 44; Have on the upper end of upper bush 42 to go up screw thread 45 is installed, have on the lower end of lower sleeve 43 screw thread 46 is installed down, it is the annular boss 47 of the up big and down small conical surface that the upper surface is arranged on the upper tube cavity wall of upper bush 42, and sliding sleeve 44 is installed on the lumen wall of lower sleeve 43 and can falls because of cutting off from the lower ending opening of lower sleeve 43 of shear screw 48 by shear screw 48; Connecting thread 49 in the sleeve is arranged at the bottom of upper bush 42, the outer connecting thread 50 of sleeve is arranged at the top of lower sleeve 43, upper bush 42 and lower sleeve 43 are fixed together by connecting thread in the sleeve 49 and the outer connecting thread 50 of sleeve, and the tube chamber of the tube chamber of upper bush 42 and lower sleeve 43 is connected; On the lower sleeve 43 upper tube cavity walls annular stop boss 51 is arranged, the outside, upper end of sliding sleeve 44 holds out against on the lower surface of annular stop boss 51, and there is the up big and down small sliding sleeve conical surface 52 at the tube chamber upper end open place of sliding sleeve 44; Sleeve shear pin screw 53 is arranged on the lower sleeve 43, and there is sliding sleeve shear pin hole 54 position of sliding sleeve 44 outsides corresponding sleeve shear pin screw 53, and the outer end of shear screw 48 is installed in the sleeve shear pin screw 53, and the inner of shear screw 48 is installed in the sliding sleeve shear pin hole 54.Only need bott stick 8 just can be finished the oil pipe shutoff from the upper end open input by blanking plug seating nipple 6: be sheared the sliding sleeve 44 that screw 53 is fixed in the blanking plug seating nipple and stoped bott stick 8 to move down, take place to move because of the promotion of bottom pressure and limited bott stick 8 by annular boss 47.When needs are opened oil pipe, only need to suppress from top, make bott stick 8 promote sliding sleeves 44 and move down when cutting off shear screw 53, sliding sleeve 44 and bott stick 8 free-fallings and the upper end open of blanking plug seating nipple 6 is communicated with lower ending opening, thereby easy to operate simply.Blanking plug seating nipple 6 is divided into upper bush 42 and lower sleeve 43, can shorten pipe range, is convenient to make processing more, deposits transportation and assembling use, and is also easy to replace and maintain.
As shown in Figure 9, bott stick 8 comprises switch core bar 55, following switch core bar 56 and monodirectional locking device; Lock dog groove 57 is arranged at the bottom of last switch core bar 55, be equipped with in the lock dog groove 57 and can be stuck on annular boss 47 lower surfaces to place restrictions on the monodirectional locking device that moves on switch core bar 55 and the following switch core bar 56, there is the annular round platform 58 that can be sitting in sliding sleeve 44 upper ends in the outside, lower end of last switch core bar 55, there is the up big and down small core bar conical surface 59 that can match with the sliding sleeve conical surface 52 lower end of annular round platform 58, the bottom center of last switch core bar 55 has the core bar that is connected with lock dog groove 57 to be connected screw 60, the top of following switch core bar 56 has lower beam to connect double-screw bolt 61, the upper end that lower beam connects double-screw bolt 61 is up-small and down-big lower beam taper seat 62, there is following core bar boss 63 in the outside, bottom of following switch core bar 56 to the position that sliding sleeve 44 bottoms should be arranged and can be sleeved in the tube chamber of sliding sleeve 44 by following core bar boss 63, the outside of following core bar boss 63 has and is no less than one following core bar seal groove 64 and sealing ring is installed, and last switch core bar 55 and following switch core bar 56 are connected screw 60 by core bar and are connected double-screw bolt 61 with lower beam and are fixed together; The monodirectional locking device comprises left lock dog 65, right lock dog 66, steady pin 67 and torque spring 68, the middle part of left side lock dog 65 and right lock dog 66 is hinged on the last switch core bar 55 at lock dog groove 57 middle parts by steady pin 67, the upper end that can make left lock dog 65 and right lock dog 66 torque spring 68 away from last switch core bar 55 axis is installed between a left side lock dog 65 and the right lock dog 66, the middle part of torque spring 68 is sleeved on the steady pin 67, the left end of torque spring 68 is fixedly mounted on the left lock dog 65, and the right-hand member of torque spring 68 is fixedly mounted on the right lock dog 66; The outside, upper end of left side lock dog 65 and right lock dog 66 extend out to the outside of switch core bar 55 by lock dog groove 57 and can be pressed on the lumen wall of upper bush 42, and the inboard, lower end of left lock dog 65 and right lock dog 66 is pressed on respectively on the lower beam taper seat 62.Bott stick 8 is divided into switch core bar 55 and following switch core bar 56, and can to shorten bar long, is convenient to make processing more, deposits transportation and assembles use, also easy to replace and maintain.The monodirectional locking device that left side lock dog 65, right lock dog 66, steady pin 67 and torque spring 68 are formed was both solid and reliable, and simple in structure again being convenient to safeguarded, also provides cost savings.When the upper end of sliding sleeve 44 is suppressed, the cooperation of the core bar conical surface 59 and the sliding sleeve conical surface 52 can guarantee the favorable sealing property of switch core bar 55 and sliding sleeve 44 contact positions, thereby shear screw 48 can be cut off suppressing under the pressure He in the stipulated time of requiring.Lower beam taper seat 62 and torque spring 68 have cooperated position-limiting action, and 66 of left lock dog 65 and right lock dogs are rotated around steady pin 67 in the angular range that requires.
As shown in Figure 9, there is anti-turn screw 69 junction of upper bush 42 and lower sleeve 43, on the upper bush 42 of connecting thread 49 belows anti-rotation screw 70 is arranged in the sleeve, there is lock hole 71 position of corresponding anti-rotation screw 70 on the lower sleeve 43, the outer end of anti-turn screw 69 is installed in the anti-rotation screw 70, and the inner of anti-turn screw 68 is installed in the lock hole 71; The sleeve seal groove 72 that is no less than one is arranged and sealing ring is installed on upper bush 42 lumen walls of connecting thread 49 tops in the sleeve, there is the sliding sleeve seal groove 73 that is no less than in the outside of sliding sleeve 44 and sealing ring is installed.Anti-turn screw 69 can prevent from because of vibration makes upper bush 42 rotate relative to lower sleeve 43 with impact screw thread to be got loose, and the sealing ring of installing in sleeve seal groove 72 and the sliding sleeve seal groove 73 can improve sealing performance.
Above technical characterictic has constituted most preferred embodiment of the present utility model, and it has stronger compliance and best implementation result, can increase and decrease non-essential technical characterictic according to actual needs, satisfies the demand of different situations.
The use of the utility model most preferred embodiment is: at first, as shown in Figure 1, perforating gun 1, tubing nipple 2, the special-purpose sandblaster 3 of perforation, the dark pipe nipple 4 in school, blanking plug are accepted tube 5, blanking plug seating nipple 6 and insert pump seating nipple 7 and assembled the back with in the oil pipe lower going-into-well, under put that to carry out the school by the dark pipe nipple 4 in school dark in the back in place, adjust the height and position of perforating gun 1 according to the dark result in school; Secondly, by suppressing from oil pipe or caber is ignited perforating gun 1 and carried out perforating job, if oil well behind the perforation is then directly blowing production of energy blowing, oil gas enters oil pipe by the spray hole 16 of the both sides, central tube 11 middle part of the special-purpose sandblaster 3 of perforation, can directly tubing string in carry out if want to carry out pressure measurement work this moment; Then, as shown in Figure 2, if will carry out fracturing work to the perforated zone, the height that then makes top, perforating gun 1 distance from bottom perforated zone is that upper lifting pipe post height H is more than 10 meters, directly carry out fracturing work by common infusion program, fracturing fluid is accepted the central tube 11 that tube 5 and the dark pipe nipple 4 in school enter the special-purpose sandblaster 3 of perforation by insert pump seating nipple 7, blanking plug seating nipple 6, blanking plug from top to bottom successively, be diverted to annular space from the spray hole 16 of both sides, central tube 11 middle part, enter the stratum and carry out pressure break; Then, if oil well behind the pressing crack construction is then blowing production of energy blowing, if can not blowing then as shown in Figure 3, in oil pipe, drop into bott stick 8 from lubricator, after closing oil pipe Deng bott stick 8, be lowered to insert pump plunger 10 by sucker rod 9, after the insert pump plunger puts in place for 10 times and bumps pump, insert pump plunger 10 is proposed insert pump seating nipple 7, suppress from oil pipe; At last, as shown in Figure 4, suppress and make bott stick 8 promotion sliding sleeves 44 move down and cut off shear screw 48, the blanking plug that sliding sleeve 44 and bott stick 8 breaks away from blanking plug seating nipples 6 and fall into the bottom is accepted in the tube 5, blanking plug seating nipple 6 recovers unimpeded, promptly finish not kill-job commentaries on classics this moment and taken out operation, as shown in Figure 5, can carry out follow-up normal oil pumping production.
Claims (10)
1. not kill-job of an oil well perforation, fracturing commentaries on classics is taken out connection and is made tubing string, it is characterized in that comprising that the special-purpose sandblaster of perforating gun, tubing nipple, perforation, the dark pipe nipple in school, blanking plug accept tube, blanking plug seating nipple and insert pump seating nipple, also comprise to be used with the blanking plug seating nipple and to close the bott stick of oil pipe passage, and can be fixedly connected on the lower end of sucker rod and be used the insert pump plunger of oil pumping with the insert pump seating nipple; The upper end of perforating gun and the lower end of tubing nipple are fixedly installed togather, the lower end of the special-purpose sandblaster of the upper end of tubing nipple and perforation is fixedly installed togather, the upper end of the special-purpose sandblaster of perforation is fixedly installed togather by the lower end of the dark pipe nipple of oil pipe and school, the lower end that the upper end of the dark pipe nipple in school and blanking plug are accepted tube is fixedly installed togather, the lower end of upper end by oil pipe and blanking plug seating nipple that blanking plug is accepted tube is fixedly installed togather, and the lower end of the upper end of blanking plug seating nipple and insert pump seating nipple is fixedly installed togather.
2. not kill-job of oil well perforation, fracturing commentaries on classics according to claim 1 is taken out connection and is made tubing string, it is characterized in that the special-purpose sandblaster of perforation comprises central tube and sheath; Last connecting thread is arranged at the top of central tube, following connecting thread is arranged at the bottom of central tube, there is sheath at the middle part of central tube, the upper end and the central tube of sheath are fixed together, the lower end of sheath and central tube have the annular space that is connected with the tube chamber of sheath between the outside, there is spray hole the position at corresponding sheath middle part on the central tube, and the tube chamber of central tube is connected with the tube chamber of sheath by spray hole.
3. not kill-job of oil well perforation, fracturing commentaries on classics according to claim 2 is taken out connection and is made tubing string, the sandblast top connection is arranged at the top that it is characterized in that central tube, the top connection screw thread is arranged at the top of sandblast top connection, the lower contact screw thread that matches with the last connecting thread of central tube is arranged at the bottom of sandblast top connection, and the bottom of sandblast top connection and the top of central tube are fixed together by lower contact screw thread and last connecting thread and keep sealing; There is screwed hole the upper end of sheath, there is the sheath retaining thread in the outside, middle part of central tube, sheath is fixedly mounted on the middle part of central tube by screwed hole and sheath retaining thread, be fixed with bushing pipe on the lumen wall of sheath, there is annular slot in the central tube outside of sheath retaining thread upper end, be equipped with in the annular slot and can limit the snap ring that moves on the sheath, the lower surface of snap ring holds out against on the upper surface of sheath, on the jacket inner wall of screwed hole lower end annular groove is arranged, on the position of the corresponding annular groove in the outside, central tube middle part annular boss is arranged, the upper surface of annular boss holds out against on the upper surface of annular groove, and there is the sheath seal groove that is no less than in the outside, the middle part of annular boss and sealing ring is installed; Spray hole is the slotted hole or the slotted eye of above-below direction, and the upper end of spray hole is lower than the lower end of screwed hole, and the lower end of spray hole is higher than the upper end of annular space.
4. change according to claim 1 or 2 or 3 described not kill-jobs of oil well perforation, fracturing and take out connection and make tubing string, it is characterized in that blanking plug accepts tube and comprise cylinder sleeve, accept top connection, accept lower contact and accept ring; The top and bottom of cylinder sleeve are fixedly connected with respectively to accept top connection and accept lower contact and also can keep sealing in the junction, the inside of accepting top connection and accepting lower contact have respectively tube chamber and with the intracavity inter-connection of cylinder sleeve, be equipped with in the inner chamber of cylinder sleeve and accept ring, the lower surface of accepting ring is sitting on the upper surface of accepting lower contact.
5. not kill-job of oil well perforation, fracturing commentaries on classics according to claim 4 is taken out connection and is made tubing string, the upper and lower that it is characterized in that cylinder sleeve have respectively go up connect internal thread with under be connected internal thread, the top of accepting top connection has top connection that screw thread is installed, the bottom of accepting top connection have can with on be connected the top connection external screw thread that internal thread matches, the top of accepting lower contact has and can be connected the lower contact external screw thread that internal thread matches with following, and the bottom of accepting lower contact has lower contact that screw thread is installed; Accept top connection and be fixedly mounted on the cylinder sleeve by last connection internal thread and top connection external screw thread, accept lower contact by under connect internal thread and the lower contact external screw thread is fixedly mounted on the cylinder sleeve; Accept to be uniformly distributed with along the circumference on the inwall of ring and be no less than three projection, the upper end of accepting ring is up-small and down-big boss; Accept top connection and be positioned at the externally threaded upper end position of top connection and have and be no less than one groove and sealing ring is installed, accept lower contact and be positioned at the externally threaded lower end position of lower contact and be equipped with and be no less than one groove and lower seal is installed.
6. change according to claim 1 or 2 or 3 described not kill-jobs of oil well perforation, fracturing and take out connection and make tubing string, it is characterized in that the blanking plug seating nipple comprises upper bush, lower sleeve and sliding sleeve; Have on the upper end of upper bush to go up screw thread is installed, have on the lower end of lower sleeve screw thread is installed down, it is the annular boss of the up big and down small conical surface that the upper surface is arranged on the upper tube cavity wall of upper bush, and sliding sleeve is installed on the lumen wall of lower sleeve and can falls because of cutting off from the lower ending opening of lower sleeve of shear screw by shear screw; Connecting thread in the sleeve is arranged at the bottom of upper bush, and the outer connecting thread of sleeve is arranged at the top of lower sleeve, and upper bush and lower sleeve are fixed together by connecting thread in the sleeve and the outer connecting thread of sleeve, and the tube chamber of upper bush and the tube chamber of lower sleeve are connected; On the lower sleeve upper tube cavity wall annular stop boss is arranged, the outside, upper end of sliding sleeve holds out against on the lower surface of annular stop boss, and there is the up big and down small sliding sleeve conical surface at the tube chamber upper end open place of sliding sleeve; Sleeve shear pin screw is arranged on the lower sleeve, and there is sliding sleeve shear pin hole the position of the corresponding sleeve shear pin screw in the sliding sleeve outside, and the outer end of shear screw is installed in the sleeve shear pin screw, and the inner of shear screw is installed in the sliding sleeve shear pin hole.
7. not kill-job of oil well perforation, fracturing commentaries on classics according to claim 4 is taken out connection and is made tubing string, it is characterized in that the blanking plug seating nipple comprises upper bush, lower sleeve and sliding sleeve; Have on the upper end of upper bush to go up screw thread is installed, have on the lower end of lower sleeve screw thread is installed down, it is the annular boss of the up big and down small conical surface that the upper surface is arranged on the upper tube cavity wall of upper bush, and sliding sleeve is installed on the lumen wall of lower sleeve and can falls because of cutting off from the lower ending opening of lower sleeve of shear screw by shear screw; Connecting thread in the sleeve is arranged at the bottom of upper bush, and the outer connecting thread of sleeve is arranged at the top of lower sleeve, and upper bush and lower sleeve are fixed together by connecting thread in the sleeve and the outer connecting thread of sleeve, and the tube chamber of upper bush and the tube chamber of lower sleeve are connected; On the lower sleeve upper tube cavity wall annular stop boss is arranged, the outside, upper end of sliding sleeve holds out against on the lower surface of annular stop boss, and there is the up big and down small sliding sleeve conical surface at the tube chamber upper end open place of sliding sleeve; Sleeve shear pin screw is arranged on the lower sleeve, and there is sliding sleeve shear pin hole the position of the corresponding sleeve shear pin screw in the sliding sleeve outside, and the outer end of shear screw is installed in the sleeve shear pin screw, and the inner of shear screw is installed in the sliding sleeve shear pin hole.
8. not kill-job of oil well perforation, fracturing commentaries on classics according to claim 5 is taken out connection and is made tubing string, it is characterized in that the blanking plug seating nipple comprises upper bush, lower sleeve and sliding sleeve; Have on the upper end of upper bush to go up screw thread is installed, have on the lower end of lower sleeve screw thread is installed down, it is the annular boss of the up big and down small conical surface that the upper surface is arranged on the upper tube cavity wall of upper bush, and sliding sleeve is installed on the lumen wall of lower sleeve and can falls because of cutting off from the lower ending opening of lower sleeve of shear screw by shear screw; Connecting thread in the sleeve is arranged at the bottom of upper bush, and the outer connecting thread of sleeve is arranged at the top of lower sleeve, and upper bush and lower sleeve are fixed together by connecting thread in the sleeve and the outer connecting thread of sleeve, and the tube chamber of upper bush and the tube chamber of lower sleeve are connected; On the lower sleeve upper tube cavity wall annular stop boss is arranged, the outside, upper end of sliding sleeve holds out against on the lower surface of annular stop boss, and there is the up big and down small sliding sleeve conical surface at the tube chamber upper end open place of sliding sleeve; Sleeve shear pin screw is arranged on the lower sleeve, and there is sliding sleeve shear pin hole the position of the corresponding sleeve shear pin screw in the sliding sleeve outside, and the outer end of shear screw is installed in the sleeve shear pin screw, and the inner of shear screw is installed in the sliding sleeve shear pin hole.
9. not kill-job of oil well perforation, fracturing commentaries on classics according to claim 8 is taken out connection and is made tubing string, it is characterized in that bott stick comprises switch core bar, following switch core bar and monodirectional locking device; The lock dog groove is arranged at the bottom of last switch core bar, be equipped with in the lock dog groove and can be stuck on the annular boss lower surface to place restrictions on the monodirectional locking device that moves on switch core bar and the following switch core bar, there is the annular round platform that can be sitting in the sliding sleeve upper end in the outside, lower end of last switch core bar, there is the up big and down small core bar conical surface that can match with the sliding sleeve conical surface lower end of annular round platform, the bottom center of last switch core bar has the core bar that is connected with the lock dog groove to be connected screw, the top of following switch core bar has lower beam to connect double-screw bolt, the upper end that lower beam connects double-screw bolt is up-small and down-big lower beam taper seat, there is following core bar boss in the outside, bottom of following switch core bar to the position that the sliding sleeve bottom should be arranged and can be sleeved in the tube chamber of sliding sleeve by following core bar boss, the outside of following core bar boss has and is no less than one following core bar seal groove and sealing ring is installed, and last switch core bar and following switch core bar are connected screw by core bar and are connected double-screw bolt with lower beam and are fixed together; The monodirectional locking device comprises left lock dog, right lock dog, steady pin and torque spring, the middle part of left side lock dog and right lock dog is hinged on the last switch core bar at lock dog groove middle part by steady pin, the upper end that can make left lock dog and the right lock dog torque spring away from last switch core bar axis is installed between a left side lock dog and the right lock dog, the middle part of torque spring is sleeved on the steady pin, the left end of torque spring is fixedly mounted on the left lock dog, and the right-hand member of torque spring is fixedly mounted on the right lock dog; The outside, upper end of left side lock dog and right lock dog extend out to the outside of switch core bar by the lock dog groove and can be pressed on the lumen wall of upper bush, and the inboard, lower end of left lock dog and right lock dog is pressed on respectively on the lower beam taper seat.
10. not kill-job of oil well perforation, fracturing commentaries on classics according to claim 9 is taken out connection and is made tubing string, there is anti-turn screw the junction that it is characterized in that upper bush and lower sleeve, on the upper bush of connecting thread below the anti-rotation screw is arranged in the sleeve, there is lock hole the position of corresponding anti-rotation screw on the lower sleeve, the outer end of anti-turn screw is installed in the anti-rotation screw, and the inner of anti-turn screw is installed in the lock hole; The sleeve seal groove that is no less than one is arranged and sealing ring is installed on the upper bush lumen wall of connecting thread top in the sleeve, there is the sliding sleeve seal groove that is no less than in the outside of sliding sleeve and sealing ring is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202773475U CN201574731U (en) | 2009-12-29 | 2009-12-29 | Combined type pipe string with functions of perforation, fracturing and non-well-killing pumping of oil wells |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202773475U CN201574731U (en) | 2009-12-29 | 2009-12-29 | Combined type pipe string with functions of perforation, fracturing and non-well-killing pumping of oil wells |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201574731U true CN201574731U (en) | 2010-09-08 |
Family
ID=42694607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202773475U Expired - Lifetime CN201574731U (en) | 2009-12-29 | 2009-12-29 | Combined type pipe string with functions of perforation, fracturing and non-well-killing pumping of oil wells |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201574731U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102383760A (en) * | 2011-07-22 | 2012-03-21 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Design method of sliding sleeve switch |
| CN103477026A (en) * | 2011-02-07 | 2013-12-25 | 克雷麦克控股有限公司 | Wellbore injection system |
| CN103967469A (en) * | 2013-01-25 | 2014-08-06 | 中国石油化工股份有限公司 | Oil-gas well fracturing string |
| CN105089530A (en) * | 2015-08-12 | 2015-11-25 | 新疆华隆油田科技股份有限公司 | Flowback preventing control valve device capable of washing well |
| CN107271304A (en) * | 2016-04-08 | 2017-10-20 | 中国石油化工股份有限公司 | Throttle sanding machine erosion test device and method |
| CN113047804A (en) * | 2020-12-29 | 2021-06-29 | 新疆华油油气工程有限公司 | Throwing and fishing type double-acting blanking plug |
| CN113445912A (en) * | 2020-03-25 | 2021-09-28 | 中国石油天然气股份有限公司 | Displacement compensation device for hydraulic jet drilling and operation pipe column |
-
2009
- 2009-12-29 CN CN2009202773475U patent/CN201574731U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103477026A (en) * | 2011-02-07 | 2013-12-25 | 克雷麦克控股有限公司 | Wellbore injection system |
| CN102383760A (en) * | 2011-07-22 | 2012-03-21 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Design method of sliding sleeve switch |
| CN103967469A (en) * | 2013-01-25 | 2014-08-06 | 中国石油化工股份有限公司 | Oil-gas well fracturing string |
| CN105089530A (en) * | 2015-08-12 | 2015-11-25 | 新疆华隆油田科技股份有限公司 | Flowback preventing control valve device capable of washing well |
| CN105089530B (en) * | 2015-08-12 | 2017-11-14 | 新疆华隆油田科技股份有限公司 | Anti- return of washing well tells control valve gear |
| CN107271304A (en) * | 2016-04-08 | 2017-10-20 | 中国石油化工股份有限公司 | Throttle sanding machine erosion test device and method |
| CN107271304B (en) * | 2016-04-08 | 2023-09-01 | 中国石油化工股份有限公司 | Erosion testing device and method for throttle sand blaster |
| CN113445912A (en) * | 2020-03-25 | 2021-09-28 | 中国石油天然气股份有限公司 | Displacement compensation device for hydraulic jet drilling and operation pipe column |
| CN113445912B (en) * | 2020-03-25 | 2023-06-30 | 中国石油天然气股份有限公司 | Displacement compensation device for hydraulic jet drilling and operation pipe column |
| CN113047804A (en) * | 2020-12-29 | 2021-06-29 | 新疆华油油气工程有限公司 | Throwing and fishing type double-acting blanking plug |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201574731U (en) | Combined type pipe string with functions of perforation, fracturing and non-well-killing pumping of oil wells | |
| CN101761323B (en) | Alliance method of oil well perforation, fracturing and snubbing transferring pumping | |
| CN201078206Y (en) | Mechanical and hydraulic pressure double-acting releasing tool | |
| CN202325440U (en) | Ball seat type ejector | |
| CN202047789U (en) | Reservoir isolating valve | |
| CN103470214B (en) | Multistage hydraulic bridging plug seating and sealing unit | |
| CN104329073A (en) | Delay-to-open sliding sleeve | |
| CN206129240U (en) | Multi -functional wall instrument of scraping of hydraulic pressure | |
| CN204299558U (en) | Delayed start-up sliding sleeve | |
| CN205445548U (en) | Outer sliding sleeve formula hydraulic pressure bleeder | |
| CN107165604B (en) | Liquid-proof fluctuation drainage device and its application method | |
| CN202946129U (en) | High-stability pressure-differential type sliding bushing | |
| CN201007186Y (en) | Lifting safety joint | |
| CN101824965A (en) | Hydraulic pulse cavitating jet generation device | |
| CN103806882B (en) | Liquid method and device is adopted in a kind of gaslift | |
| CN203412563U (en) | Drillable slide sleeve | |
| CN210087274U (en) | Sand-flushing hydraulic cutting knife | |
| CN201930634U (en) | Automatic back washing filter | |
| CN205089285U (en) | Prevent flowing backward control valve and layering and prevent flowing backward combination tubular column with adopting | |
| CN104100206A (en) | Drill bit with stabilizer | |
| CN208885242U (en) | A kind of drainage device | |
| CN103437742A (en) | Sand-replenishing tool for rapidly opening and closing filling channel | |
| CN204060657U (en) | A kind of layered fracturing pipe string | |
| CN202017605U (en) | Multifunctional oil-well pump | |
| CN103321620B (en) | With brill gel injection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100908 |
|
| CX01 | Expiry of patent term |