CN103485751B - Modular bullet holder device - Google Patents
Modular bullet holder device Download PDFInfo
- Publication number
- CN103485751B CN103485751B CN201310447859.2A CN201310447859A CN103485751B CN 103485751 B CN103485751 B CN 103485751B CN 201310447859 A CN201310447859 A CN 201310447859A CN 103485751 B CN103485751 B CN 103485751B
- Authority
- CN
- China
- Prior art keywords
- bullet
- supporting plate
- perforating
- holder support
- support plate
- 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.)
- Active
Links
Abstract
The invention discloses a kind of Modular bullet holder device, relate to perforating oil gas well completion practice technical field, comprise bullet supporting plate, lower bullet supporting plate and two bullet holder support plates, described upper bullet supporting plate and lower bullet supporting plate have the shell hole for matching with perforating bullet external diameter, described bullet holder support plate is relied on to be connected and fixed between upper bullet supporting plate and lower bullet supporting plate, described bullet holder support plate is connected with hinge and chute pin, bullet holder support plate is also processed with at least one calibration fixing hole, hinge is positioned on the bullet holder support plate of lower bullet supporting plate, calibration fixed hole position is on the bullet holder support plate near upper bullet supporting plate, chute pin is between hinge and calibration fixing hole.The present invention changes original fixed form of perforating bullet, is conducive to adjusting the inclination angle fracture reservoir that perforating bullet transmit direction aims at Oil/gas Well on high-dip structure band, solves separate modular locking and the support problem of perforating bullet.
Description
Technical field
The present invention relates to perforating oil gas well completion practice technical field, exactly relate to a kind of Modular bullet holder device.
Background technology
The conventional gas and oil of each Exploration Prospect of Giant Oilfields exploitation in the current world is hidden, occur that a direction reservoir intrinsic fracture of part Oil/gas Well on high-dip structure band is very grown, but under the perforator condition in conventional helical cloth hole, carry out operation, intrinsic fracture is seldom aimed in perforation tunnel, make Oil/gas Well single well productivity not high, sand output well also with seriously shaking out, can bring larger well head operation pressure also to follow-up well stimulation, not reach effect of increasing production.
Publication number is CN202381054U, publication date is that the Chinese patent literature on August 15th, 2012 discloses a kind of perforating oil gas well with containing the holder of energy bullet, with solve existing perforating bullet deposit easily loosen, easily come off going into the well in course of conveying, and the nonadjustable problem of the height of burst of perforating bullet.It comprises perforating bullet holder, is arranged with compression fastener above described perforating bullet holder, and described perforating bullet holder is also provided with draw-in groove, and described draw-in groove is provided with elastic component, is provided with boss in described perforating bullet holder.The utility model structure is simple, and interworking exchanges strong adaptability, and cost is low; Structure diversification; Can replace synergistic perforating medicine cake, be saving space, perforator inside; The height of burst that boss can control perforating bullet is provided with in perforating bullet holder.The utility model can replace the effect of composite medicine cake completely, is applicable to all kinds of gun perforation process and the application of all kinds of perforating bullet type.
But with the prior art that above-mentioned patent document is representative, still there is following technical problem:
1, existing bullet rest device, fixed form is unsatisfactory, and the whole bullet holder surrounding perforating bullet is unfavorable for adjusting the inclination angle fracture reservoir that perforating bullet transmit direction aims at Oil/gas Well on high-dip structure band.
2, existing bullet rest device is applied on perforator, Oil/gas Well orientating function targetedly cannot be realized.
3, the perforating bullet jet direction in existing bullet rest device is perpendicular to Oil/gas Well axis, is fixing, can not carry out angle operation.
Summary of the invention
The present invention is intended to for the defect existing for above-mentioned prior art and deficiency, a kind of Modular bullet holder device is provided, adopts the present invention, the jet direction of perforator can be made to have orientating function on the one hand, on the other hand, perforating bullet jet direction can the controlled and varied angle regulatory function had in a big way.Change original fixed form of perforating bullet, be conducive to adjusting the inclination angle fracture reservoir that perforating bullet transmit direction aims at Oil/gas Well on high-dip structure band, solve separate modular locking and the support problem of perforating bullet.
The present invention realizes by adopting following technical proposals:
A kind of Modular bullet holder device, it is characterized in that: comprise bullet supporting plate, lower bullet supporting plate and two bullet holder support plates, described upper bullet supporting plate and lower bullet supporting plate have the shell hole for matching with perforating bullet external diameter, described bullet holder support plate is relied on to be connected and fixed between upper bullet supporting plate and lower bullet supporting plate, described bullet holder support plate is connected with hinge and chute pin, bullet holder support plate is also processed with at least one calibration fixing hole, hinge is positioned on the bullet holder support plate of lower bullet supporting plate, calibration fixed hole position is on the bullet holder support plate near upper bullet supporting plate, chute pin is between hinge and calibration fixing hole.
Calibration fixing hole on described bullet holder support plate is two.
The top playing the perforating bullet in rest device is cylindric, and bottom is inverted cone mesa-shaped, and the perforating bullet bottom of circular cone shape is provided with step and stopper slot, and lower bullet supporting plate embeds in described stopper slot.
Compared with prior art, the beneficial effect that the present invention reaches shows:
1, in the present invention, the bullet rest device structure that have employed supporting plate type holds up and entangles perforating bullet firm, change original fixed form of perforating bullet, be conducive to adjusting the inclination angle fracture reservoir that perforating bullet transmit direction aims at Oil/gas Well on high-dip structure band, solve separate modular locking and the support problem of perforating bullet.
Bullet holder support plate is connected with hinge and chute pin, is convenient to coordinate with directed steel structure, hinge is used for realizing rotating function with directed steel structure, and chute pin is used for coordinating with directed steel structure realizing swinging positioning function;
Bullet holder support plate is also processed with at least one calibration fixing hole, and calibration fixing hole is used for after swinging to desired location, the holder of modularization bullet is fixed.
2, in the present invention, the calibration fixing hole on bullet holder support plate is two, such form of structure, is convenient to Modular bullet holder device and in the angular range of 0-180 degree, makes trickleer angle adjustment and fix.
3, in the present invention, the top of perforating bullet is cylindric, bottom is inverted cone mesa-shaped, the perforating bullet bottom of circular cone shape is provided with step and stopper slot, lower bullet supporting plate embeds in described stopper slot, so specific form of structure, is convenient to coordinate with Modular bullet holder device, thus makes the fixing convenient, firm of perforating bullet.
Accompanying drawing explanation
Below in conjunction with specification drawings and specific embodiments, the present invention is described in further detail, wherein:
Fig. 1 is the overall structure schematic diagram of variable firing angle perforator;
Fig. 2 is the front view of Modular bullet holder device;
Fig. 3 is the top view of Modular bullet holder device;
Fig. 4 is the right view of Modular bullet holder device;
Fig. 5 is the structural representation of upper bullet supporting plate;
Fig. 6 is the structural representation of lower bullet supporting plate;
Fig. 7 is the structural representation of bullet holder support plate;
Fig. 8 is the structural representation of hinge;
Fig. 9 is the structural representation of chute pin;
Figure 10 is the structural representation of perforating bullet;
Figure 11 is the structural representation of directed steel structure;
Figure 12 is the structural representation of directed side's structure;
Figure 13 is the front view of retainer ring;
Figure 14 is the top view of retainer ring;
Figure 15 is the right view of retainer ring;
Figure 16 is the front view of gasket ring;
Figure 17 is the top view of gasket ring;
Figure 18 is the right view of gasket ring.
Mark in figure:
1, retainer ring, 2, Modular bullet holder device, 3, directed steel structure, 4, hinge, 5, steady pin, 6, gasket ring, 7, perforating bullet, 8, jump ring, 9, lower bullet supporting plate, 10, bullet holder support plate, 11, chute pin, 12, calibration fixing hole, 13, upper bullet supporting plate, 14, square groove, 15, horizontal edge, 16, circular arc, 17, shell hole, 18, vertical edge, 19, upper horizontal edge, 20, lower horizontal edge, 21, middle vertical edge, 22, upper vertical edge, 23, lower vertical edge, 24, the counter sink of bearing pin is installed, 25, the counter sink of chute pin is installed, 26, the upper face of cylinder, 27, the lower face of cylinder, 28, screw thread, 29, the face of cylinder, 30, the conical surface, 31, step, 32, stopper slot, 33, orientation side's structure, 34, side's structure counter sink, 35, regulate chute, 36, hinge axis hole, 37, index hole, 38, head, 39, fixed head, 40, pin-and-hole, 41, groove.
Detailed description of the invention
Embodiment 1
As the present invention one better embodiment, the invention discloses a kind of Modular bullet holder device, comprise bullet supporting plate 13, lower bullet supporting plate 9 and two bullet holder support plates 10, upper bullet supporting plate 13 and lower bullet supporting plate 9 have the shell hole 17 for matching with perforating bullet 7 external diameter, bullet holder support plate 10 is relied on to be connected and fixed between upper bullet supporting plate 13 and lower bullet supporting plate 9, bullet holder support plate 10 is connected with hinge 4 and chute pin 11, bullet holder support plate 10 is also processed with at least one calibration fixing hole 12, hinge 4 is positioned on the bullet holder support plate 10 of lower bullet supporting plate 9, calibration fixing hole 12 is positioned on the bullet holder support plate 10 of upper bullet supporting plate 13, chute pin 11 is between hinge 4 and calibration fixing hole 12,
This Modular bullet holder device is applied on variable firing angle perforator, the directed steel structure 3 that variable firing angle perforator comprises Modular bullet holder device 2 and coordinates with Modular bullet holder device 2, perforating bullet 7 is installed in Modular bullet holder device 2;
The directed steel structure 3 coordinated with Modular bullet holder device comprises the directed side's structure 33 of two orientation side's structures 33, retainer ring 1 and gasket ring 6, two and is arranged in parallel, and one end of two directed side's structures 33 is all connected with retainer ring 1, and the other end is all connected with gasket ring 6; Orientation side's structure 33 is processed with hinge axis hole 36, regulates multiple index holes 37 of chute 35 and the distribution in arcuation, regulate chute 35 between index hole 37 and hinge axis hole 36; Modular bullet holder device 2 is installed between two directed side's structures 33, and the hinge 4 of Modular bullet holder device 2 coordinates with the hinge axis hole 36 on orientation side's structure 33, and chute pin 11 coordinates with adjustment chute 35, and calibration fixing hole 12 coordinates with index hole 37.
Embodiment 2
As another better embodiment of the present invention, on the basis of embodiment 1, hinge axis hole 36 on orientation side's structure 33, adjustment chute 35 and arcuation index hole 37 are that the perforating bullet 7 perforation direction in the Modular bullet holder device 2 between two adjacent groups is contrary and adjustable in the distribution of group shape.The index hole 37 that orientation side's structure 33 is arranged is two rows.Orientation side's structure 33 is sheet material shape.
Retainer ring 1 comprises circular head 38, the head 38 of circle is provided with two pieces of fixed heads be arranged in parallel 39, two pieces of fixed heads 39 are vertical with head 38 and one-body molded, two pieces of fixed heads 39 are processed with pin-and-hole 40, two fixed heads 39 are fixed respectively at two directed side's structures 33 through steady pin 5, and the head 38 of circle is provided with step.
Gasket ring 6 comprises circular head 38, the head 38 of circle is provided with two pieces of fixed heads be arranged in parallel 39, two pieces of fixed heads 39 are vertical with head 38 and one-body molded, and two pieces of fixed heads 39 are processed with pin-and-hole 40, and two fixed heads 39 are fixed respectively at two directed side's structures 33 through steady pin 5.
Embodiment 3
As another better embodiment of the present invention, on the basis of embodiment 2, the calibration fixing hole 12 on bullet holder support plate 10 is two.The top of perforating bullet 7 is cylindric, and bottom is inverted cone mesa-shaped, and perforating bullet 7 bottom of circular cone shape is provided with step 31 and stopper slot 32, and lower bullet supporting plate 9 embeds in stopper slot 32.
Embodiment 4
With reference to Figure of description 1-4 and 11, the example of the embody rule of variable firing angle perforator is:
1. the parallel framework orientating function of directed steel structure 3, two ends employing steady pin 5 is fastened on retainer ring 1 and makes directed side's structure 33 parallel, realize 0 °, phase place, 180 ° of orientations, be set up design hinge axis hole 36, arcuation index hole 37 at the reasonable hole mil of two pieces of directed steel structures 3 and regulate chute 35.2. establish Modular bullet holder device 2 according to perforating bullet 7 dimensional requirement structure, steel plate cuts two blocks of suitable bullet supporting plates and two pieces of bullet holder supports, play supporting plate by both sides support welding together; Both sides support is attacked chute pin 11 hole, hinge axis hole 36 and calibration fixing hole 12; Chute pin 11, hinge 4 are welded on the support of both sides.3. on perforating bullet 7, stopper slot 32 is designed, with jump ring 8, it is spacing in Modular bullet holder device 2.4. directed side's structure 33 is combined with Modular bullet holder device 2, located with the hinge 4 in Modular bullet holder device 2 by the hinge axis hole 36 on orientation side's structure 33, chute pin 11 inserts and regulates chute 35, hinge 4 to be screwed on screws tighten, the out of phase of adjustment module bullet holder is also fixing, realizes single perforating bullet 7 angle directed; 5. retainer ring 1, gasket ring 6 are fixed shaping with orientation side's structure 33 by steady pin 5.
Modular bullet holder device 2 connects as follows: load in the circular hole of both sides bullet holder support plate 10 by hinge 4, chute pin 11, firm welding; Lower bullet supporting plate 9 and upper bullet supporting plate 13 snap in two pieces of bullet holder support plate 10 square grooves 14, firm welding; Perforating bullet 7 is inserted in bullet supporting plate 13 and lower bullet supporting plate 9, in the stopper slot 32 snapping in perforating bullet 7 with jump ring 8 and block firm.
Directed steel structure 3 connects as follows: by two pieces of orientation side's structure 33 contraposition retainer rings 1 and gasket ring 6, then connected by eight steady pins 5, and tighten up.
Variable firing angle perforator connects as follows: the hinge axis hole 36 hinge 4 of Modular bullet holder device 2 and chute pin 11 being placed in directed side's structure 33, with in adjustment chute 35, to be screwed on bolt at hinge 4; According to angle requirement, stir the chute pin 11 of modularization bullet holder, and angle overlaps with arcuation index hole 37 on orientation side's structure 33, spacer pin of screwing on; Retainer ring 1, gasket ring 6 are snapped in location side's structure, two steady pins 5 of respectively screwing on.
Embodiment 5
With reference to Figure of description 5-10, the preferred example of Modular bullet holder device 2 is:
As shown in Figure 5, upper bullet supporting plate 13 adopts the cutting of 32# steel plate to be formed, and has symmetry.Square cuts out vertical edge 18, horizontal edge 15, square steel plate cuts fillet and forms circular arc 16, cut out a shell hole 17 in square middle position, horizontal edge 15 cuts out square groove 14.
As shown in Figure 6, lower bullet supporting plate 9 adopts the cutting of 32# steel plate to be formed, and has symmetry.Square cuts out horizontal edge 15, square steel plate cuts fillet and forms circular arc 16, cut out a shell hole 17 in square middle position, horizontal edge 15 cuts out square groove 14.
As shown in Figure 7, bullet holder support plate 10 adopts the cutting of 32# steel plate to be formed.Horizontal edge 19, middle vertical edge 21, lower horizontal edge 20 on square cuts out, then cut out vertical edge 22, lower vertical edge 23, and square steel plate cuts two calibration fixing holes 12, cuts out one and install the counter sink 24 of bearing pin and the counter sink of an installation chute pin 11.
As shown in Figure 8, hinge 4 adopts the turning of 45# round steel to be formed.The face of cylinder 26, the lower face of cylinder 27 on round steel is got on the bus out, tap out 28 on axis of symmetry.
As shown in Figure 9, hinge 4 adopts the turning of 45# round steel to be formed.The face of cylinder 26, the lower face of cylinder 27 on round steel is got on the bus out.
As shown in Figure 10, perforating bullet 7 adopts the turning of 45# round steel to be formed.Flat two ends on round steel, car goes out the face of cylinder 29, and car goes out the conical surface 30, to get on the bus out step 31 and stopper slot 32 at the conical surface 30.
Modular bullet holder device 2 connects as follows: load in the circular hole of both sides bullet holder support plate 10 by hinge 4, chute pin 11, firm welding; Lower bullet supporting plate 9 and upper bullet supporting plate 13 snap in two pieces of bullet holder support plate 10 square grooves 14, firm welding; Perforating bullet 7 is inserted in bullet supporting plate 13 and lower bullet supporting plate 9, in the stopper slot 32 snapping in perforating bullet 7 with jump ring 8 and block firm.
Embodiment 6
With reference to Figure of description 11-18, the embody rule example of directed steel structure 3 is:
As shown in figure 11, the structural concept that directed steel structure 3 adopts directed side's structure 33, retainer ring 1, gasket ring 6, steady pin 5 to combine, realizes variable firing angle perforation function.
As shown in figure 12, directed side's structure 33 is special with two block of material 32# steel plates, two ends is respectively attacked two square structure counter sinks 34, cut out adjustment chute 35, cut out hinge axis hole 36, the index hole 37 of arcuation is arranged in tapping two, regulates chute 35, hinge axis hole 36 and index hole 37 jointly to realize varied angle function; Directed two ends adopt screw fastening on retainer ring 1, make directed side's structure 33 parallel, realize 0 °, phase place, 180 ° of orientations.
As illustrated in figs. 13-15, retainer ring 1 adopts 45# steel car to go out cylindrical, and then mills out step 31, then mills out groove 41, finally on two pieces of fixed heads 39, gets out two pin-and-holes 40 respectively.
As shown in figs. 16-18, gasket ring 6 adopts 45# steel car to go out cylindrical, and then mills out step, then mills out groove 41, finally gets out two pin-and-holes 40 respectively at two pieces of fixed heads 39.
Directed steel structure 3 connects as follows: by two pieces of orientation side's structure 33 contraposition retainer rings 1 and gasket ring 6, then connected by eight steady pins 5, and tighten up.
Claims (3)
1. a Modular bullet holder device, it is characterized in that: comprise bullet supporting plate (13), lower bullet supporting plate (9) and two bullet holder support plates (10), described upper bullet supporting plate (13) and lower bullet supporting plate (9) have the shell hole (17) for matching with perforating bullet (7) external diameter, described bullet holder support plate (10) is relied on to be connected and fixed between upper bullet supporting plate (13) and lower bullet supporting plate (9), described bullet holder support plate (10) is connected with hinge (4) and chute pin (11), bullet holder support plate (10) is also processed with at least one calibration fixing hole (12), hinge (4) is positioned on the bullet holder support plate (10) of lower bullet supporting plate (9), calibration fixing hole (12) is positioned on the bullet holder support plate (10) of upper bullet supporting plate (13), chute pin (11) is positioned between hinge (4) and calibration fixing hole (12).
2. Modular bullet holder device according to claim 1, is characterized in that: the calibration fixing hole (12) on described bullet holder support plate (10) is two.
3. Modular bullet holder device according to claim 1, it is characterized in that: the top of the perforating bullet (7) in Modular bullet holder device is cylindric, bottom is inverted cone mesa-shaped, perforating bullet (7) bottom of circular cone shape is provided with step (31) and stopper slot (32), and lower bullet supporting plate (9) embeds in described stopper slot (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310447859.2A CN103485751B (en) | 2013-09-27 | 2013-09-27 | Modular bullet holder device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310447859.2A CN103485751B (en) | 2013-09-27 | 2013-09-27 | Modular bullet holder device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103485751A CN103485751A (en) | 2014-01-01 |
| CN103485751B true CN103485751B (en) | 2015-08-19 |
Family
ID=49826298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310447859.2A Active CN103485751B (en) | 2013-09-27 | 2013-09-27 | Modular bullet holder device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103485751B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105222659B (en) * | 2015-09-18 | 2017-10-31 | 西北核技术研究所 | Centring type angle of attack bullet support before and after a kind of Balance Gun |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2096639U (en) * | 1991-08-31 | 1992-02-19 | 西安石油勘探仪器总厂 | Cue torr |
| US7740059B1 (en) * | 2008-09-09 | 2010-06-22 | Spencer William A | Well casing perforator |
| CN201574736U (en) * | 2009-10-09 | 2010-09-08 | 中国兵器工业第二一三研究所 | Firing angle adjusting charge carrier for perforating gun |
| CN102493792A (en) * | 2011-12-23 | 2012-06-13 | 甘肃省化工研究院 | Energetic perforating bullet holder for oil and gas well |
| CN202381054U (en) * | 2011-12-23 | 2012-08-15 | 甘肃省化工研究院 | Energy containing bullet support for oil-gas well perforation |
-
2013
- 2013-09-27 CN CN201310447859.2A patent/CN103485751B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2096639U (en) * | 1991-08-31 | 1992-02-19 | 西安石油勘探仪器总厂 | Cue torr |
| US7740059B1 (en) * | 2008-09-09 | 2010-06-22 | Spencer William A | Well casing perforator |
| CN201574736U (en) * | 2009-10-09 | 2010-09-08 | 中国兵器工业第二一三研究所 | Firing angle adjusting charge carrier for perforating gun |
| CN102493792A (en) * | 2011-12-23 | 2012-06-13 | 甘肃省化工研究院 | Energetic perforating bullet holder for oil and gas well |
| CN202381054U (en) * | 2011-12-23 | 2012-08-15 | 甘肃省化工研究院 | Energy containing bullet support for oil-gas well perforation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103485751A (en) | 2014-01-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201127968Y (en) | Perforating die for conveniently adjusting | |
| CN103485751B (en) | Modular bullet holder device | |
| CN103485749B (en) | The variable perforator of perforating oil gas well firing angle | |
| CN203499656U (en) | Variable firing angle perforator | |
| CN203499657U (en) | Modular bomb device | |
| CN102031895B (en) | Assembly tool of tongue piece clamping fence | |
| CN201526667U (en) | Quick opening flange fixing structure | |
| CN203499655U (en) | Directional steel structure | |
| CN201748653U (en) | Burner assembly of gas water heater | |
| CN201874305U (en) | Tongue piece clamping type fence and assembling tool | |
| CN103801734A (en) | Drill jig structure for machining plunger hole | |
| CN203062874U (en) | Blanking die structure with movable positioning pin | |
| CN102240916A (en) | Metal part tool | |
| CN202344098U (en) | Three-cutting-torch device for flame cutting machine groove cutting flame | |
| CN201455304U (en) | Multi-edge boring cutter | |
| CN207392773U (en) | Installation support for insulation board locking structure | |
| CN202380420U (en) | Greening guardrail modified from common guardrail | |
| CN206647696U (en) | The device of height and level can preferably be adjusted | |
| CN201789066U (en) | Rotary fixed seat device for satellite antenna | |
| CN202726095U (en) | Multi-height transformation turning tool | |
| CN201739319U (en) | Movable nut assembly structure | |
| CN220551355U (en) | Locking bolt capable of limiting | |
| CN103507231A (en) | Valve needle cushion block | |
| CN203888143U (en) | Valve pin spacer | |
| CN204934679U (en) | Aircraft is disassembled component reset and is installed Quick drilling tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200917 Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Chuanqing Drilling Engineering Co.,Ltd. Address before: The 1 section of No. 3 company Chuanqing Drilling Technology Information Office Chenghua District Green Road 610051 Chengdu City, Sichuan Province Patentee before: CNPC Chuanqing Drilling Engineering Co.,Ltd. |
|
| TR01 | Transfer of patent right |