CN103174402A - Longitudinal absorber for reducing perforation instantaneous shock vibration force - Google Patents
Longitudinal absorber for reducing perforation instantaneous shock vibration force Download PDFInfo
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- CN103174402A CN103174402A CN2011104370678A CN201110437067A CN103174402A CN 103174402 A CN103174402 A CN 103174402A CN 2011104370678 A CN2011104370678 A CN 2011104370678A CN 201110437067 A CN201110437067 A CN 201110437067A CN 103174402 A CN103174402 A CN 103174402A
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Abstract
The invention relates to a longitudinal absorber for reducing perforation instantaneous shock vibration force. The longitudinal absorber comprises a pressure guide tube, an inner sleeve sleeved outside the pressure guide tube and an outer sleeve sleeved outside the inner sleeve; two ends of the pressure guide tube are respectively connected with an upper connector and a lower connector, a connection position between the pressure guide tube and the upper connector is fixed through threads, an internal cavity of the pressure guide tube is always communicated with that of the upper connector, and the pressure guide tube penetrates through an internal cavity of the lower connector to be communicated with the outside; a spring is further sleeved outside the inner sleeve, the spring and the outer sleeve are arranged in parallel, and an outer casing is sleeved outside the spring; and sealing pieces are arranged at the connecting position of the upper connector and the pressure guide tube and at the connecting position of the upper connector and the inner sleeve, and the sealing pieces are further arranged at the connecting position of the inner sleeve and the outer sleeve and at the connecting position of the lower connector and the pressure guide tube. The longitudinal absorber effectively solves the problem that a motive seal of a conventional perforation absorber is easy to damage, weakens the perforation instantaneous shock vibration force, changes the liquid compression vibration attenuation environment, improves safe reliability and is simple and reasonable in structural design and strong in operability.
Description
Technical field
The present invention relates to the perforating oil gas well damping technology, specifically a kind of longitudinal shock absorber that reduces perforation moment impact vibration force.
Background technology
At present, perforating oil gas well mainly contains hydraulic pressure, mechanical dual mode with vibration damping, is mainly used in perforating test connection and does in construction protection to testing tool.Along with further developing of perforating technology, particularly Shengli Oil Field perforation laboratory is found, the pressure of perforation moment changes with perforating effect and has close relationship, and perforation larger surge pressure of moment has brought challenge to existing oscillation damping method.At first now use the exterior and interior axle sleeves slipper seal hydraulic performance decline of shock absorber; Secondly the internal compression structure makes initiator bear instantaneous pressure, and the quick-fried phenomenon of mistake easily occurs; Be full of the liquid of identical pressure during due to pressurization in shock absorber, make shock absorber lose damping elastomer, make its original damping property all gone.
On-the-spot use and laboratory proofing the existing defective that exists with shock absorber, movable sealing is in the regular damage of seal in temperature, pressure influence lower compression, extensional motion process, excessive mainly due to slipper seal place diameter, cause friction area to increase, increased the possibility that seal damages.Simultaneously, in compression process, its inner liquid is squeezed, in case compression process is too fast, internal liquid excretion is untimely certainly will may be occurred building the pressure, and has increased the risk that the pressure blasting device of its underpart is detonated by mistake.
The present invention is directed to perforation moment impact ripple and vibration force to the impact of lower well tool and tubing string, belong to damping shear pin buffering, spring-compressed cooperation, hydraulic flow-limiting discharging and the vibration damping category of finding time.
In view of this, for the problems referred to above, propose a kind of reasonable in design and effectively improve the longitudinal shock absorber of the reduction perforation moment impact vibration force of above-mentioned disappearance.
Summary of the invention
The object of the present invention is to provide a kind of longitudinal shock absorber that reduces perforation moment impact vibration force, the present invention for the defective of present existence, carries out the important technology structural change, and has effectively got rid of risk on the basis of design in the past.Efficiently solve the flimsy defective of conventional perforation shock absorber movable sealing, weakened the impact shock power of perforation moment, changed liquid compression vibration damping environment, improved its security reliability, the structure design advantages of simple, workable.
In order to reach above-mentioned purpose, the invention provides a kind of longitudinal shock absorber that reduces perforation moment impact vibration force, the outer sleeve that comprises connecting pipe, is enclosed within the inner sleeve in the connecting pipe outside and is enclosed within the inner sleeve outside; Described connecting pipe two ends connect respectively top connection and lower contact, are fixing by screw thread with the top connection junction and connecting pipe and top connection internal cavities keep being communicated with, and connecting pipe passes the lower contact inner chamber and is communicated to the external world; The described inner sleeve outside also cover spring is arranged and with outer sleeve for being set up in parallel, overlapping in the spring outside has shell body; Described inner sleeve is connected with top connection by screw thread; Described outer sleeve is connected with lower contact by screw thread; A shell body wherein end is connected with top connection by screw thread, and the other end is threaded connection retainer ring and is fixed on outer sleeve by retainer ring; Described top connection is provided with seal with connecting pipe and inner sleeve connection respectively, and described inner sleeve and outer sleeve junction and lower contact and connecting pipe connection are provided with seal equally.
Described top connection left end inside is cavity, and the right-hand member inwall offers to connect the internal thread of outer sleeve and connecting pipe, and also offers to seal two road sealing grooves of inner sleeve and the sealing surface that is used for sealing connecting pipe on inwall; The length of described cavity satisfies the compression travel length of connecting pipe.
Described connecting pipe left end arranges external screw thread, this external screw thread position of turning right arranges the two seals groove, and the connecting pipe left outer is thick right thin, and the taper end outside diameter is small in lower contact inner channel diameter, and the taper end outside diameter is 20-24mm, and the connecting pipe inboard arranges flow-guiding channel.
Described inner sleeve left end arranges external screw thread, and the inner sleeve outside diameter is small in outer sleeve body inside diameter, and the inner sleeve inside diameter is less than connecting pipe tubbiness outside diameter.
Described spring outside diameter is slightly less than the shell body inside diameter, and the spring inside diameter is less than the inner sleeve outside diameter, and its compression travel is 0-80mm.
Described shell body left and right end all arranges internal thread and top wire hole, and the shell body left side arranges position, one group of four directions to be advanced/drain hole, and the shell body right side arranges two groups of four azimuth antihunt shear pin holes that are used for installing the damping shear pin, and shell body inside is cavity.
Described outer sleeve left end arranged outside two seals groove, the outer sleeve outside diameter of turning right is slightly little, and twice are set become 180 degree install to place the anti-rotation grooves of antirotation keys, the outer sleeve right-hand member arranges external screw thread, one group of Three-bearing outage is set on outer sleeve, outer sleeve left end inboard arranges seal groove, and outer sleeve inboard and intracavity diameter are little greater than the inner sleeve outside diameter.
Described retainer ring right-hand member arranges external screw thread, and retainer ring inner chamber inboard arranges twice and becomes 180 degree that the anti-rotation grooves of antirotation keys are installed, retainer ring arranged outside annular knurl, and the retainer ring inside diameter is small in the outer sleeve outside diameter.
Described lower contact left end arranges internal thread, and right-hand member arranges external screw thread, and lower contact right-hand member inner chamber inboard arranges the three seals groove, on the interior cavity wall of position, sealing surface is set inward at seal groove.
Compared to prior art, the present invention reduces the longitudinal shock absorber of perforation moment impact vibration force, movable sealing design defect for the existence of conventional perforation shock absorber, and the low problem of structure design security risk, redesign vibration-proof structure and technique connect method, weaken the perforation vibratory impulse power of moment, guarantee the realization of the gun perforation process such as perforating test connection work, dynamic negative-pressure.When pressurizeing from well head, pressure is transmitted on the pressure blasting device by the connecting pipe in the perforation shock absorber, when perforating gun detonates, moment produces huge impact force action on the pipe string, and perforation resistance of shock absorber shear pin is cut off, and promotes outer sleeve and moves upward, spring plays the alleviation impact force action, liquid around spring is discharged suction by drain hole simultaneously, and the liquid of outer sleeve inner chamber is discharged suction by outage, effectively subdues the vibration of spring itself.The present invention efficiently solves the flimsy defective of conventional perforation shock absorber movable sealing, has weakened the impact shock power of perforation moment, has changed liquid compression vibration damping environment, has improved its security reliability.
Description of drawings
Fig. 1 is the sectional view that the present invention reduces the longitudinal shock absorber embodiment of perforation moment impact vibration force:
Fig. 2 is the structural representation that the present invention reduces the top connection in the longitudinal shock absorber of perforation moment impact vibration force:
Fig. 3 is the structural representation that the present invention reduces the connecting pipe in the longitudinal shock absorber of perforation moment impact vibration force:
Fig. 4 is the structural representation that the present invention reduces the inner sleeve in the longitudinal shock absorber of perforation moment impact vibration force:
Fig. 5 is the structural representation that the present invention reduces the spring in the longitudinal shock absorber of perforation moment impact vibration force:
Fig. 6 is the structural representation that the present invention reduces the shell body in the longitudinal shock absorber of perforation moment impact vibration force:
Fig. 7-1 reduces the structural representation of the inner sleeve in the longitudinal shock absorber of perforation moment impact vibration force for the present invention:
Fig. 7-2 are the A-A sectional view of Fig. 7-1;
Fig. 8-1 reduces the structural representation of the retainer ring in the longitudinal shock absorber of perforation moment impact vibration force for the present invention;
Fig. 8-2 are that the A of Fig. 8-1 is to view;
Fig. 9 is the structural representation that the present invention reduces the lower contact in the longitudinal shock absorber of perforation moment impact vibration force.
[critical element symbol description]
1, top connection;
11, external screw thread; 12, seal groove; 13, sealing surface; 14, internal thread; 15, sealing surface; 16, internal thread; 17, internal thread; 18, cavity;
2, connecting pipe;
21, external screw thread; 22, seal groove; 23, the connecting pipe outside; 24, flow-guiding channel;
3, inner sleeve;
31, external screw thread; 32, the inner sleeve outside; 330, inner sleeve is inboard;
4, spring;
41, the spring outside; 42, spring is inboard;
5, shell body;
51, internal thread; 52, internal thread; 53, shell body is inboard; 54, top wire hole; 55, damping shear pin hole; 56, advance/drain hole; 57, cavity;
6, outer sleeve;
61, seal groove; 62, seal groove; 63, the outer sleeve left end outside; 64, the outer sleeve right-hand member outside; 65, outage; 66, external screw thread; 67, anti-rotation groove; 68, outer sleeve is inboard; 69, outer sleeve inner chamber;
7, retainer ring;
71, external screw thread; 72, retainer ring is inboard; 73, anti-rotation groove; 74, retainer ring inner chamber;
8, lower contact;
81, internal thread; 82, external screw thread; 83, inner channel; 84, sealing surface; 85, lower contact inner chamber;
91, jackscrew; 92, damping shear pin; 93, seal.
The specific embodiment
Relevant detailed description of the present invention and technology contents coordinate description of drawings as follows, yet accompanying drawing only provides the use of reference with explanation, and the present invention is limited.
referring to Fig. 1, the present invention reduces the structure of longitudinal shock absorber of perforation moment impact vibration force by top connection 1, connecting pipe 2, inner sleeve 3, spring 4, shell body 5, outer sleeve 6, retainer ring 7, lower contact 8, seal 93, jackscrew 91 and damping shear pin 92 form, its inboard is connecting pipe 2, be socketed successively outward inner sleeve 3, spring 4, outer sleeve 6, outermost end is shell body 5 and retainer ring 7, two ends, left and right, the outside connect respectively top connection 1 and lower contact 8, seal 93 is arranged in corresponding seal groove, jackscrew 91 and damping shear pin 92 are arranged in shell body corresponding duct.
Referring to Fig. 2, described top connection 1 right-hand member arranges external screw thread 11, and the inboard arranges two seals groove 12, sealing surface 13, internal thread 14, sealing surface 15, internal thread 16 inward, and left end arranges internal thread 17 and cavity 18.The length of cavity 18 satisfies the compression travel length of connecting pipe 2.The space is provided for many longitudinal shock absorbers are flexible.
Referring to Fig. 3, Fig. 9, described connecting pipe 2 left ends arrange external screw thread 21, and turning right arranges two seals groove 22, the body outside 23 is left thick right thin, the taper end outside diameter is small in lower contact 8 inner channel 83 diameters, and the taper end outside 23 diameters are 20-24mm, and connecting pipe 2 inboards arrange flow-guiding channel 24.
Referring to Fig. 4, Fig. 7-1, Fig. 7-2, Fig. 3, described inner sleeve 3 left ends arrange external screw thread 31, and outside body, 32 diameters are small in inboard 68 diameters of outer sleeve 6 bodies, and inboard 33 diameters of body are less than 23 diameters outside connecting pipe 2 tubbiness, and its compression travel is 0-80mm.
Referring to Fig. 5, Fig. 6, Fig. 4, described spring 4 outside 41 diameters are slightly less than inboard 53 diameters of shell body 5, and inboard 42 diameters are less than inner sleeve 3 outside 32 diameters, and its compression travel is 0-80mm.
Referring to Fig. 6, described shell body 5 left and right ends all arrange internal thread 51,52 and top wire hole 54, and the body left side arranges position, one group of four directions to be advanced/drain hole 56, and advance/drain hole is by the jackscrew shutoff, can leave and take according to design; The body right side arranges two group of four azimuth antihunt shear pin hole 55, and the damping pin is installed quantity can be according to the design of perforation moment impact vibration simulation, and body interior is cavity 57.
Referring to Fig. 7-1, Fig. 7-2, Fig. 4, outside described outer sleeve 6 left ends, 63 arrange two seals groove 61, the outside 64 diameters of turning right are slightly little, and twice are set become 180 degree anti-rotation groove 67(to install to place antirotation keys), right-hand member arranges external screw thread 66, turning left arranges one group of Three-bearing outage 65, and the left end inboard arranges seal groove 62, its inboard 68 and inner chamber 69 diameters little greater than the inner sleeve 3 bodies outsides 32 diameters.
Referring to Fig. 8-1, Fig. 8-2, Fig. 7, described retainer ring 7 right-hand members arrange external screw thread 71, inner chamber 74 inboards 72 arrange anti-rotation groove 73(that twice become 180 degree coordinate antirotation keys are installed), the arranged outside annular knurl, inboard 72 diameters are small in the outer sleeve 6 bodies outsides 64 diameters.
Referring to Fig. 9, described lower contact 8 left ends arrange internal thread 81, and right-hand member arranges external screw thread 82, and right-hand member inner chamber 85 inboards arrange three seals groove 84, and sealing surface 84 is set inward.
Assembling instruction: at first top connection 1 seal groove 12 and connecting pipe 2 seal grooves 22 are installed seal 93; The left end external screw thread 21 of connecting pipe 2 is connected with top connection 1 internal thread 16; Inner sleeve 3 external screw threads 31 are connected with top connection 1 internal thread 14; The inner sleeve 3 bodies outsides 32 are inserted in spring 4 inboards 42; Outer sleeve 6 seal grooves 62 are installed seals 93, and anti-rotation groove 67 is installed antirotation keys, and outer sleeve 6 inboards 68 are enclosed within inner sleeve 3 outsides 32; Shell body 5 internal threads 52 are connected with retainer ring 7 external screw threads 71, and integral body inboard 53 is enclosed within outer sleeve 6 and spring 4 outsides 41, and the anti-rotation groove 73 of retainer ring 7 is snapped on the antirotation keys of outer sleeve 6, and left end internal thread 51 is connected with top connection 1 external screw thread 11; Lower contact 8 seal grooves 84 are installed seal 93, and its internal thread 81 is connected with the external screw thread 66 of outer sleeve 6, and outside while connecting pipe 2 right-hand members, 23 pass lower contact 8 inner chambers, and stretch out certain distance; At top wire hole 54, jackscrews 91, damping shear pin hole 55 is installed respectively at last damping shear pins 92 are installed.
During use, at first according to on-site actual situations, keep the number of damping shear pin 92, unnecessary removal.often two these shock absorbers are connected in on-the-spot the use, the top connection internal thread 17 of first shock absorber is connected with the lower contact external screw thread 82 of second shock absorber, integral body is connected into perforation pipe string, general upper end is packer, the lower end is oil pipe and pressure blasting device, and by seal 93 isolating seals, connecting pipe 2 right-hand member external diameters are little with extraneous for inner connecting pipe 2, only have the 20-24mm left and right, effectively reduce the infringement probability of three seals groove 84 inner seal liners 93, on original perforation shock absorber outer sleeve 6, outage 65 is not set, and without independent connecting pipe 2, run into drilling string not well braked during lower brill, percussion drill outer sleeve 6 damping shear pins are cut off backward upper motion in advance, Compress Spring 4 and the interior liquid of inner chamber 69, in a single day compressed liquid is drained untimely, its pressure will act directly on the pressure blasting device of below, cause mistake perforation accident, the present invention arranges outage 65 on outer sleeve 6, and loading connecting pipe 2, connecting pipe 2 and lower contact 8 relative motion in compression and elongation process, and sealing, connecting pipe 2 outside liquid are discharged by outer sleeve 6 outages.Completely cut off and cut through the pressure pipe road, effectively avoided the mistake risk of detonating, improved the security performance of shock absorber.
Operating principle: when pressurizeing from well head, pressure is transmitted on the pressure blasting device by the connecting pipe 2 in the perforation shock absorber, when perforating gun detonates, moment produces huge impact force action on the pipe string, perforation resistance of shock absorber shear pin 92 is cut off, promoting outer sleeve 6 moves upward, spring 4 plays the alleviation impact force action, liquid around spring 4 is discharged by drain hole 56 and is sucked simultaneously, the liquid of outer sleeve 6 inner chambers 69 is discharged by outage 65 and is sucked, the vibration of effectively subduing spring itself.
The above is only preferred embodiment of the present invention, and non-in order to limit the scope of the claims of the present invention, other use the equivalence of patent spirit of the present invention to change, and all should all belong to the scope of the claims of the present invention.
Claims (9)
1. a longitudinal shock absorber that reduces perforation moment impact vibration force, is characterized in that, the outer sleeve that comprises connecting pipe, is enclosed within the inner sleeve in the connecting pipe outside and is enclosed within the inner sleeve outside; Described connecting pipe two ends connect respectively top connection and lower contact, are fixing by screw thread with the top connection junction and connecting pipe and top connection internal cavities keep being communicated with, and connecting pipe passes the lower contact inner chamber and is communicated to the external world; The described inner sleeve outside also cover spring is arranged and with outer sleeve for being set up in parallel, overlapping in the spring outside has shell body; Described inner sleeve is connected with top connection by screw thread; Described outer sleeve is connected with lower contact by screw thread; A shell body wherein end is connected with top connection by screw thread, and the other end is threaded connection retainer ring and is fixed on outer sleeve by retainer ring; Described top connection is provided with seal with connecting pipe and inner sleeve connection respectively, and described inner sleeve and outer sleeve junction and lower contact and connecting pipe connection are provided with seal equally.
2. a kind of longitudinal shock absorber that reduces perforation moment impact vibration force as claimed in claim 1, it is characterized in that, described top connection left end inside is cavity, the right-hand member inwall offers to connect the internal thread of outer sleeve and connecting pipe, and also offers to seal two road sealing grooves of inner sleeve and the sealing surface that is used for sealing connecting pipe on inwall; The length of described cavity satisfies the compression travel length of connecting pipe.
3. a kind of longitudinal shock absorber that reduces perforation moment impact vibration force as claimed in claim 1, it is characterized in that, described connecting pipe left end arranges external screw thread, this external screw thread position of turning right arranges the two seals groove, the connecting pipe left outer is thick right thin, the taper end outside diameter is small in lower contact inner channel diameter, and the taper end outside diameter is 20-24mm, and the connecting pipe inboard arranges flow-guiding channel.
4. a kind of longitudinal shock absorber that reduces perforation moment impact vibration force as claimed in claim 1, it is characterized in that, described inner sleeve left end arranges external screw thread, and the inner sleeve outside diameter is small in outer sleeve body inside diameter, and the inner sleeve inside diameter is less than connecting pipe tubbiness outside diameter.
5. a kind of longitudinal shock absorber that reduces perforation moment impact vibration force as claimed in claim 1, is characterized in that, described spring outside diameter is slightly less than the shell body inside diameter, and the spring inside diameter is less than the inner sleeve outside diameter, and its compression travel is 0-80mm.
6. a kind of longitudinal shock absorber that reduces perforation moment impact vibration force as claimed in claim 1, it is characterized in that, described shell body left and right end all arranges internal thread and top wire hole, the shell body left side arranges position, one group of four directions and advances/drain hole, the shell body right side arranges two groups of four azimuth antihunt shear pin holes that are used for installing the damping shear pin, and shell body inside is cavity.
7. a kind of longitudinal shock absorber that reduces perforation moment impact vibration force as claimed in claim 1, it is characterized in that, described outer sleeve left end arranged outside two seals groove, the outer sleeve outside diameter of turning right is slightly little, and the anti-rotation groove that twice become 180 degree installation placement antirotation keys is set, the outer sleeve right-hand member arranges external screw thread, and one group of Three-bearing outage is set on outer sleeve, outer sleeve left end inboard arranges seal groove, and outer sleeve inboard and intracavity diameter are little greater than the inner sleeve outside diameter.
8. a kind of longitudinal shock absorber that reduces perforation moment impact vibration force as claimed in claim 1, it is characterized in that, described retainer ring right-hand member arranges external screw thread, retainer ring inner chamber inboard arranges twice and becomes 180 degree that the anti-rotation groove of antirotation keys is installed, retainer ring arranged outside annular knurl, the retainer ring inside diameter is small in the outer sleeve outside diameter.
9. a kind of longitudinal shock absorber that reduces perforation moment impact vibration force as claimed in claim 1, it is characterized in that, described lower contact left end arranges internal thread, right-hand member arranges external screw thread, lower contact right-hand member inner chamber inboard arranges the three seals groove, on the interior cavity wall of position, sealing surface is set inward at seal groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104370678A CN103174402A (en) | 2011-12-23 | 2011-12-23 | Longitudinal absorber for reducing perforation instantaneous shock vibration force |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104370678A CN103174402A (en) | 2011-12-23 | 2011-12-23 | Longitudinal absorber for reducing perforation instantaneous shock vibration force |
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| CN103174402A true CN103174402A (en) | 2013-06-26 |
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| CN2011104370678A Pending CN103174402A (en) | 2011-12-23 | 2011-12-23 | Longitudinal absorber for reducing perforation instantaneous shock vibration force |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104818951A (en) * | 2015-04-29 | 2015-08-05 | 中国海洋石油总公司 | Perforating string bidirectional damping device |
| CN107035346A (en) * | 2016-02-04 | 2017-08-11 | 中石化石油工程技术服务有限公司 | One kind is used for cable transfer perforation damper |
| CN107100598A (en) * | 2017-06-30 | 2017-08-29 | 中国石油大学(北京) | Perforation dampening arrangement |
| CN108319765A (en) * | 2018-01-16 | 2018-07-24 | 中国石油大学(北京) | A kind of damping processing method and processing device for cannula type packer |
| CN111140202A (en) * | 2020-01-13 | 2020-05-12 | 中国石油天然气股份有限公司 | Deep well and ultra-deep well integrated production completion pipe string and operation method thereof |
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| CN2182877Y (en) * | 1994-03-17 | 1994-11-16 | 大庆石油管理局采油工艺研究所 | Oscillator for perforator |
| US6412614B1 (en) * | 1999-09-20 | 2002-07-02 | Core Laboratories Canada Ltd. | Downhole shock absorber |
| CN200975252Y (en) * | 2006-12-06 | 2007-11-14 | 西安通源石油科技股份有限公司 | Buffering device of testing system for oil gas well perforation |
| CN201588626U (en) * | 2009-10-14 | 2010-09-22 | 中国石油化工集团公司 | Double-system longitudinal shock absorber |
| CN202493247U (en) * | 2011-12-23 | 2012-10-17 | 中国石油化工股份有限公司 | Longitudinal vibration damper reducing impact vibratory force in perforation moment |
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2011
- 2011-12-23 CN CN2011104370678A patent/CN103174402A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2182877Y (en) * | 1994-03-17 | 1994-11-16 | 大庆石油管理局采油工艺研究所 | Oscillator for perforator |
| US6412614B1 (en) * | 1999-09-20 | 2002-07-02 | Core Laboratories Canada Ltd. | Downhole shock absorber |
| CN200975252Y (en) * | 2006-12-06 | 2007-11-14 | 西安通源石油科技股份有限公司 | Buffering device of testing system for oil gas well perforation |
| CN201588626U (en) * | 2009-10-14 | 2010-09-22 | 中国石油化工集团公司 | Double-system longitudinal shock absorber |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104818951A (en) * | 2015-04-29 | 2015-08-05 | 中国海洋石油总公司 | Perforating string bidirectional damping device |
| CN107035346A (en) * | 2016-02-04 | 2017-08-11 | 中石化石油工程技术服务有限公司 | One kind is used for cable transfer perforation damper |
| CN107100598A (en) * | 2017-06-30 | 2017-08-29 | 中国石油大学(北京) | Perforation dampening arrangement |
| CN107100598B (en) * | 2017-06-30 | 2018-06-29 | 中国石油大学(北京) | Perforation dampening arrangement |
| CN108319765A (en) * | 2018-01-16 | 2018-07-24 | 中国石油大学(北京) | A kind of damping processing method and processing device for cannula type packer |
| CN108319765B (en) * | 2018-01-16 | 2020-06-19 | 中国石油大学(北京) | Shock absorption treatment method and device for intubation type packer |
| CN111140202A (en) * | 2020-01-13 | 2020-05-12 | 中国石油天然气股份有限公司 | Deep well and ultra-deep well integrated production completion pipe string and operation method thereof |
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Application publication date: 20130626 |