CN201883991U - Compensation type multi-purpose annular blowout preventer - Google Patents
Compensation type multi-purpose annular blowout preventer Download PDFInfo
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- CN201883991U CN201883991U CN2010206588495U CN201020658849U CN201883991U CN 201883991 U CN201883991 U CN 201883991U CN 2010206588495 U CN2010206588495 U CN 2010206588495U CN 201020658849 U CN201020658849 U CN 201020658849U CN 201883991 U CN201883991 U CN 201883991U
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- 238000007789 sealing Methods 0.000 claims abstract description 69
- 239000012530 fluid Substances 0.000 claims abstract description 4
- 206010057071 Rectal tenesmus Diseases 0.000 claims description 21
- 208000012271 tenesmus Diseases 0.000 claims description 21
- 229910000831 Steel Inorganic materials 0.000 claims description 18
- 239000010959 steel Substances 0.000 claims description 18
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 230000008676 import Effects 0.000 claims description 5
- 238000002955 isolation Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 238000003801 milling Methods 0.000 abstract 1
- 239000003129 oil well Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 32
- 230000002265 prevention Effects 0.000 description 18
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000013536 elastomeric material Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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Abstract
The utility model relates to a blowout preventer for sealing the wellhead of an oil well of an oil field, in particular to a compensation type multi-purpose annular blowout preventer which is used for sealing the annulus between the tubing and the casing of a wellhead and preventing blowout during the tubing-tripping and casing-milling operations of an oil and water well or an oil and gas well. The blowout preventer comprises an upper flange, a lower flange and a sealing cylinder, and the sealing cylinder consists of two parts, i.e. an inner sealing body and an outer sealing body. The blowout preventer is characterized in that: a cavity structure is formed between the outer sealing body and the inner sealing body, the upper end of the outer sealing body is connected with the upper flange, and the lower end of the outer sealing body is connected with the lower flange; when fluid medium is injected into the cavity between the outer sealing body and the inner sealing body, the inner sealing body is shrunk inward so as to tightly hold a tubing or a cable or close a barren hole, and thereby the upper and the lower ends of the tubing fixed by the sealing bodies can be sealed and isolated. The blowout preventer is light, and is convenient to mount and operate, the tubing can be tripped under pressure, the range of tubings and wells is wide, and the effect of sealing under pressure is good.
Description
Technical field
The utility model relates to the preventer of oilfield well head sealing, is exclusively used in particularly that oil-water well, oil gas well remove oil pipe, the compensation multipurpose annular blowout hookup of well head oil pipe and casing annulus sealing and blowout prevention when cover is worn away operation.
Background technology
When oil field well workover, test jobs, on the one hand in order to prevent that oil pipe and casing annulus profit gas from gushing or prevent that the well head junk from falling into the well from well head, must adorn preventer at well head.On the other hand,, prevent the unexpected generation of blowout, also need adorn preventer at well head in order to scrape off the good casing annulus of oil-pipe external wall greasy dirt and fast sealing.
Existing flashboard class preventer has following several weak point: one, to hold tightly at ram block under the situation of oil pipe, and oil pipe can not carry out rountrip; Its two, ram preventer, a pair of flashboard can only be held a kind of tubing of shape tightly, can not difform tubing of the many specifications of simultaneous adaptation such as cylindric, cubic, hexagonal kelly class instrument; Its three, flashboard class preventer will realize oil pipe, cable, wire rope, these several functions of pass empty well, just must adopt triple ram preventer, and the triple ram preventer complexity, volume is big, the cost height.
Summary of the invention
The purpose of this utility model provides a kind ofly to be had light weight, installation and easy to operate, oil pipe and can be with and press rountrip, pipe well scope wide, a kind of compensation multipurpose annular blowout hookup that the band means of press seals is effective.
The technical solution of the utility model is achieved in that compensation multipurpose annular blowout hookup, it comprises upper flange, lower flange, sealed cylinder block, sealed cylinder block is made of interior seal and external seal body two parts, it is characterized in that: form cavity structure between external seal body and the interior seal, external seal body upper end is connected with upper flange, and external seal body lower end is connected with lower flange; When outwards the cavity between seal and the interior seal injected fluid media (medium), interior seal inwardly shrank, thereby seal is held oil pipe or cable tightly or closed empty well in making, and made the fixing oil pipe pipeline of seal carry out seal isolation in two ends up and down.
Described upper flange is an annular, there is inner via hole the centre of upper flange, the upper end sidewall of inner via hole has first internal thread, the upper surface of upper flange has steel ring slot, the upper flange lower middle position has annular groove, there is a seal groove on the last plane of annular groove, and the upper flange upper end has around upper flange annulus one all equally distributed upper flange bolts hole.
The cylindrical size of described upper flange is consistent with supporting wellhead flange, and the outer thickness of upper flange is 40mm～70mm.
Described first internal thread is used to connect two halves formula pressure ring or is used to connect self-sealing blowout preventer or is used to connect two halves formula seal rubber sleeve.
Seal is a hollow cylindrical in described, interior seal endoporus top in the interior seal is the fall horn mouth of upper port greater than lower port, interior seal has tenesmus sealing strip edge at the top cylindrical, the tenesmus sealing strip has seal boss along upper surface, the tenesmus end on tenesmus sealing strip edge is the tenesmus sealed circular ring, annulus main body cylindrical has certain clearance in the middle of tenesmus sealed circular ring and the interior seal, and the side, bottom of interior seal is fixed with steel frame.
The type of falling the carnival hat structure that described external seal body is the bottom uncovered, there is penetrating external seal body bolt hole the outer, top of external seal body, there is the annular seal projection upper end, outer of external seal body, external seal body top inner chamber has interior seal boss, sealed groove in forming between interior seal boss and the intracavity sidewall, external seal body bottom outer wall has the external seal extracorporeal thread, there is one or two sealing medium import the both sides, middle part of external seal body, and there is a seal groove lower surface, seal bottom outside.
Described lower flange is the penetrating cirque structure in middle part, and boss is arranged in the middle of the top of lower flange, and circle has second internal thread in the boss, below second internal thread, a plane step is arranged, and lower flange has around lower flange annulus one all equally distributed lower flange bolts hole.
Described lower flange can be connected with well head lower flange or preventer flange or well head big four flange by the lower flange bolt hole, the external diameter of lower flange and the well head lower flange that links to each other or preventer flange or well head big four flange outer diameter are consistent, the lower flange lower plane, a lower flange steel ring slot is arranged, and the ring gasket groove on the well head lower flange that the size of lower flange steel ring slot and lower flange connect, preventer flange, the well head big four flange is consistent.
The beneficial effects of the utility model are: the utility model not only has the function of preventer, and also has the characteristics that ram preventer did not have.One is held tightly under the situation of oil pipe at interior seal (blowout prevention gum cover), and oil pipe can carry out rountrip in the same old way; Its two because gum cover has high strength, high resiliency, so a kind of gum cover can be held cylindric tubing or four directions, hexagonal kelly class instrument tightly.Particularly cooperate two halves formula seal rubber sleeve 7, instruments such as all right hermetically-sealed cable, wire rope, sucker rod.These 2 is the characteristics that other ram preventer does not possess.In addition, the utility model can also be used with self-sealing blowout preventer, do not having under the situation of hydraulic coupling, utilize self-styled gum cover self to hold the characteristic of oil pipe tightly, oil pipe and casing annulus are carried out low pressure seal, or when annular space had well to press in well, self-styled gum cover bottom was held oil pipe tightly and is played self sealing action.
The utility model compare with existing technology have light weight, installation and easy to operate, oil pipe can be with the pressure rountrip, applied widely, the band means of press seals is effective.Annular blowout prevention gum cover adopts elastomeric material wear-resisting and that intensity is high, can effectively increase the service life and improves the blowout prevention burst accident.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples:
Fig. 1 is the utility model example structure schematic diagram;
Fig. 2 is that the utility model and self-sealing blowout preventer are used connection layout;
Structure scheme of installation when Fig. 3 is the utility model hermetically-sealed cable, wire rope;
Fig. 4 is an annular upper flange structural representation;
Fig. 5 is a two halves formula circular cover generalized section;
Fig. 6 is a two halves formula circular cover vertical view;
Fig. 7 is interior seal (annular blowout prevention gum cover) structural representation;
Fig. 8 is an external seal housing structure schematic diagram;
Fig. 9 is an annular preventer lower flange structural representation;
Figure 10 is the self-sealing blowout preventer structural representation;
Figure 11 is two halves formula seal rubber sleeve structural representation Fig. 1;
Figure 12 is two halves formula seal rubber sleeve structural representation Fig. 2;
Figure 13 is the utility model and formation testing preventer connection diagram;
Figure 14 is the utility model and well head lower flange connection diagram;
Figure 15 is the utility model and well head big four connection diagram.
Among the figure: 1, upper flange; 2, two halves formula pressure ring; 3, interior seal; 4, external seal body; 5, lower flange; 6, self-sealing blowout preventer; 7, two halves formula seal rubber sleeve; 8, first internal thread; 9, inner via hole; 10, steel ring slot; 11, upper flange bolt hole; 12, seal groove; 13, external screw thread; 14, seal boss; 15, fall horn mouth; 16, annular gum cover endoporus middle and lower part inner surface; 17, tenesmus sealing strip edge; 18, tenesmus sealed circular ring; 19, the inconsistent cylindrical of blowout prevention gum cover; 20, blowout prevention gum cover skeleton; 21, " Y " shape sealing ring; 22, " O " shape sealing ring; 23, external seal body bolt hole; 24, annular seal projection; 25, seal groove in the sealing outer cylinder body; 26, seal boss in the sealing outer cylinder body; 27, sealing medium import; 28, sealing outer cylinder body bottom connecting thread; 29, sealing outer cylinder body lower surface " O " type circle seal groove; 30, sealing outer cylinder body inner surface; 31, lower flange bolt hole; 32, boss in the middle of the lower flange; 33, lower flange and sealing outer cylinder body connecting thread; 34, sealing plane; 35, steel ring slot; 36, the outer connecting thread of self-styled gum cover; 37, self-styled gum cover skeleton; 38, endoporus spigot surface on the self-styled gum cover; 39, self-styled gum cover seal section; 40, the outer garden of self-styled gum cover face; 41, spigot surface under the self-styled gum cover; 42, two halves formula seal rubber sleeve top connecting thread; 43, two halves formula seal rubber sleeve skeleton; 44, two halves formula seal rubber sleeve inner via hole; 45, the outer round recessed of two halves formula seal rubber sleeve; 46, formation testing ram preventer; 47, well head lower flange; 48, well head big four.
The specific embodiment
Embodiment 1
The structural representation of this compensation multipurpose annular blowout hookup as shown in Figure 1, which comprises at least upper flange 1, lower flange 5, sealed cylinder block, sealed cylinder block is made of interior seal 3 and external seal body 4 two parts, form cavity structure between external seal body 4 and the interior seal 3, external seal body 4 upper ends are connected with upper flange 1 with bolt, external seal body 4 lower ends are connected with lower flange 5 with screw thread, and the flange hole of upper flange 1 communicates up and down with the flange hole of lower flange 5; When outwards the cavity between seal 4 and the interior seal 3 injected fluid media (medium), interior seal 3 inwardly shrank, thereby seal 3 is held oil pipe or cable tightly or closed empty well in making, and made the fixing oil pipe pipeline of seal carry out seal isolation in two ends up and down.
Embodiment 2
Upper flange 1 among the embodiment 1 as shown in Figure 4, upper flange 1 is an annular, the cylindrical size of upper flange 1 is consistent with supporting wellhead flange, the outer thickness of upper flange 1 is 40mm～70mm, there is inner via hole 9 centre of upper flange 1, inner via hole 9 is via holes of oil pipe or instrument, and the upper end sidewall of inner via hole 9 has first internal thread 8.
The upper surface of upper flange 1 has a steel ring slot 10, can cooperate steel ring to play sealing function with supporting well head upper flange.The upper flange lower middle position has annular groove, there is a seal groove 12 on the last plane of annular groove, the outer, top of seal 3 in annular groove is used for fixing, and seal by 12 pairs of link positions of seal groove, upper flange 1 upper end has around upper flange 1 annulus one all equally distributed upper flange bolts hole 11, present embodiment is 12 upper flange bolts hole 11, can be connected with the well head upper flange.
First internal thread 8 is used to connect two halves formula pressure ring 2, see Fig. 1, on the cylindrical of two halves formula pressure ring 2 external screw thread 13 is arranged, the no screw thread of interior circle, see Fig. 5, Fig. 6, be connected with first internal thread 8 at inner via hole 9 places in the middle of the annular upper flange 1 by external screw thread 13, two halves formula pressure ring 2 plays a guard ring effect, and the purpose of two halves is to be convenient to be installed to when the situation of oil pipe is arranged in the circular upper flange upper internal threaded; Play protective action, avoid the internal thread of oil pipe, instrument collision upper flange.
First internal thread 8 can also be used to connect self-sealing blowout preventer 6, sees Fig. 2, or is used to connect two halves formula seal rubber sleeve 7, sees Fig. 3.
Circle has second internal thread 33 in the boss 32 of lower flange 5, be threaded by the external seal extracorporeal thread 28 of second internal thread 33 with external seal body 4 bottom outer walls, below second internal thread 33, a plane step 34 is arranged, plane step 34 contacts with the lower surface of external seal body 4, and plane step 34 forms a sealing ring seal cavity with the seal groove 29 of external seal body 4 bottoms.
At lower flange 5 lower planes, a lower flange steel ring slot 35 is arranged, the ring gasket groove on the well head lower flange 47 that the size of lower flange steel ring slot 35 and lower flange connect, preventer 46 flanges, well head big four 48 flanges is consistent.
Self-sealing blowout preventer 6 among the embodiment 2 as shown in figure 10, self-sealing blowout preventer 6 is made of self-styled gum cover and outer link 36 two parts of self-styled gum cover, self-styled gum cover is divided into endoporus guide section 38, seal section 39, following endoporus guide section 41, last endoporus guide section 38 is fixedlyed connected by the outer link 36 of self-styled gum cover skeleton 37 and self-styled gum cover, there is external screw thread in outer link 36 outsides of self-styled gum cover, self-sealing blowout preventer 6 is connected with first internal thread 8 of upper flange 1 by external screw thread, form the gap between the self-styled gum cover periphery 40 in seal section 39 outsides and the interior seal 3, certain borehole pressure can be sealed, and oil pipe can be set upright, prevent that well head smallclothes object from falling in the well.
Two halves formula seal rubber sleeve 7 among the embodiment 2 when hermetically-sealed cable, wire rope, installs to preventer middle part with two halves formula seal rubber sleeve 7 as shown in figure 11, and two halves formula seal rubber sleeve is merged into one when cylindric, and its outside diameter is not more than interior seal 3 diameter of bores.
There is two halves formula seal rubber sleeve skeleton 43 on the top of two halves formula seal rubber sleeve 7, two halves formula seal rubber sleeve skeleton 43 sidepieces have two halves formula seal rubber sleeve external screw thread 42, be connected with first internal thread 8 of upper flange 1 by two halves formula seal rubber sleeve external screw thread 42, two halves formula seal rubber sleeve home position has two halves formula seal rubber sleeve through hole 44, see Figure 12, two halves formula seal rubber sleeve sidepiece has the outer round recessed 45 of two halves formula seal rubber sleeve, under the situation of this preventer seal 3 in not changing, by increasing two halves formula seal rubber sleeve 7 with regard to salable cable, wire rope and sucker rod etc.
In operation process, in case the well kick phenomenon takes place in the well, need blowout prevention gum cover sealing oil pipe or when sealing entirely, outside can provide annular that hydraulic oil forms between seal 3 and the external seal body 4 in entering in liquid space, inwardly shrink at extruding open flow gum cover 3 middle parts, and then make the blowout prevention gum cover hold oil pipe tightly, play the effect of Sealed casing pipe annular space.
Seal or only seal under the situation that oil pipe is half envelope entirely at interior seal 3, the bottom of seal 3 in borehole pressure can upwards be pushed, like this, interior seal moves on 3 bottoms, and the ring-like space between interior seal 3 and the external seal body 4 will be reduced, and the liquid in the annular space is squeezed, gum cover will further be held oil pipe tightly, even externally not continuing provides under the situation of pressure to preventer, only depend on the lifting of borehole pressure just can increase the preventer enclasping pressure indirectly simultaneously, play compensating action.
Compensation multipurpose annular blowout prevention method is with respect to little, in light weight, the good sealing effect, of many uses, easy to operate of ram preventer volume of routine, and cost reduces greatly.
Compensation multipurpose annular blowout prevention method not only has the function of ram preventer, and, also have the characteristics that ram preventer did not have; One is held tightly at the blowout prevention gum cover under the situation of oil pipe, and oil pipe can carry out rountrip in the same old way; Its two because gum cover has high strength, high resiliency, so can hold cylindric tubing or four directions, hexagonal kelly class instrument tightly.Particularly cooperate two halves formula seal rubber sleeve 7, instruments such as all right hermetically-sealed cable, wire rope, sucker rod.These 2 is the characteristics that any ram preventer does not possess.In addition, compensation multipurpose annular blowout prevention method can also be used (as Fig. 2) with self-sealing blowout preventer 6, do not have under the situation of hydraulic coupling in compensation multipurpose annular blowout prevention method inside, utilize self-styled gum cover self to hold the characteristic of oil pipe tightly, oil pipe and casing annulus are carried out low pressure seal, or when annular space had well to press in well, self-styled gum cover bottom was held oil pipe tightly and is played self sealing action.
The utility model is compared with existing technology, compensation type multi-purpose annular blowout prevention method is lighter than ram preventer quality, installation and easy to operate, can rountrip with pressure, also applied widely than self-sealing well device, good sealing effect with pressure. Annular blowout prevention gum cover adopts elastomeric material wear-resisting and that intensity is high, can effectively increase the service life and improves the blowout prevention burst accident.
Claims (8)
1. compensation multipurpose annular blowout hookup, it comprises upper flange (1), lower flange (5), sealed cylinder block, sealed cylinder block is made of interior seal (3) and external seal body (4) two parts, it is characterized in that: form cavity structure between external seal body (4) and the interior seal (3), external seal body (4) upper end is connected with upper flange (1), and external seal body (4) lower end is connected with lower flange (5); When outwards the cavity between seal (4) and the interior seal (3) injects fluid media (medium), interior seal (3) inwardly shrinks, thereby make interior seal (3) hold oil pipe or cable or pass empty well tightly, make the fixing oil pipe pipeline of seal carry out seal isolation in two ends up and down.
2. compensation multipurpose annular blowout hookup according to claim 1, it is characterized in that: described upper flange (1) is an annular, there is inner via hole (9) centre of upper flange (1), the upper end sidewall of inner via hole (9) has first internal thread (8), the upper surface of upper flange (1) has steel ring slot (10), the upper flange lower middle position has annular groove, there is a seal groove (12) on the last plane of annular groove, and upper flange (1) upper end has around upper flange (1) annulus one all equally distributed upper flange bolts hole (11).
3. compensation multipurpose annular blowout hookup according to claim 2, it is characterized in that: the cylindrical size of described upper flange (1) is consistent with supporting wellhead flange, and the outer thickness of upper flange (1) is 40mm～70mm.
4. compensation multipurpose annular blowout hookup according to claim 2, it is characterized in that: described first internal thread (8) is used to connect two halves formula pressure ring (2) or is used to connect self-sealing blowout preventer (6) or is used to connect two halves formula seal rubber sleeve (7).
5. compensation multipurpose annular blowout hookup according to claim 1, it is characterized in that: seal (3) is a hollow cylindrical in described, interior seal endoporus (16) top in the interior seal (3) is the horn mouth (15) of upper port greater than lower port, interior seal (3) has the tenesmus sealing strip along (17) at the top cylindrical, the tenesmus sealing strip has seal boss (14) along (17) upper surface, the tenesmus sealing strip is a tenesmus sealed circular ring (18) along the tenesmus end of (17), tenesmus sealed circular ring (18) has certain clearance with the middle annulus main body cylindrical of interior seal (3) (19), and the side, bottom of interior seal (3) is fixed with steel frame (20).
6. compensation multipurpose annular blowout hookup according to claim 1, it is characterized in that: described external seal body (4) is the type of falling the carnival hat structure of bottom uncovered, there is penetrating external seal body bolt hole (23) outer, top of external seal body (4), there is annular seal projection (24) upper end, outer of external seal body (4), external seal body (4) top inner chamber has interior seal boss (26), sealed groove (25) in forming between interior seal boss (26) and the intracavity sidewall, external seal body (4) bottom outer wall, external seal extracorporeal thread (28) is arranged, there is one or two sealing medium import (27) both sides, middle part of external seal body (4), and there is a seal groove (29) lower surface, seal (4) bottom outside.
7. compensation multipurpose annular blowout hookup according to claim 1, it is characterized in that: described lower flange (5) is the penetrating cirque structure in middle part, boss (32) is arranged in the middle of the top of lower flange (5), circle has second internal thread (33) in the boss (32), in second internal thread (33) below, a plane step (34) is arranged, and lower flange (5) has around lower flange (5) annulus one all equally distributed lower flange bolts hole (31).
8. compensation multipurpose annular blowout hookup according to claim 7, it is characterized in that: described lower flange (5) can be connected with well head lower flange (47) or preventer (46) flange or well head big four (48) flange by lower flange bolt hole (31), the external diameter of lower flange (5) and the well head lower flange (47) that links to each other or preventer (46) flange or well head big four (48) flange outer diameter are consistent, lower flange (5) lower plane, a lower flange steel ring slot (35) is arranged, the well head lower flange (47) that the size of lower flange steel ring slot (35) is connected with lower flange, preventer (46) flange, ring gasket groove unanimity on well head big four (48) flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206588495U CN201883991U (en) | 2010-12-14 | 2010-12-14 | Compensation type multi-purpose annular blowout preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206588495U CN201883991U (en) | 2010-12-14 | 2010-12-14 | Compensation type multi-purpose annular blowout preventer |
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| Publication Number | Publication Date |
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| CN201883991U true CN201883991U (en) | 2011-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206588495U Expired - Lifetime CN201883991U (en) | 2010-12-14 | 2010-12-14 | Compensation type multi-purpose annular blowout preventer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061901A (en) * | 2010-12-14 | 2011-05-18 | 雷宽成 | Compensation type multi-purpose annular blowout preventer |
| CN109184611A (en) * | 2018-08-29 | 2019-01-11 | 曲睿婕 | Four ram preventer of coiled tubing, half seal apparatus |
-
2010
- 2010-12-14 CN CN2010206588495U patent/CN201883991U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061901A (en) * | 2010-12-14 | 2011-05-18 | 雷宽成 | Compensation type multi-purpose annular blowout preventer |
| CN102061901B (en) * | 2010-12-14 | 2016-01-06 | 雷宽成 | Compensation type multi-purpose annular blowout preventer |
| CN109184611A (en) * | 2018-08-29 | 2019-01-11 | 曲睿婕 | Four ram preventer of coiled tubing, half seal apparatus |
| CN109184611B (en) * | 2018-08-29 | 2020-11-06 | 徐州企润食品有限公司 | Coiled tubing four-ram blowout preventer semi-sealing device |
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Legal Events
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: XI'AN YUXING PETROLEUM MACHINERY OF NEW TECHNOLOGY Effective date: 20120516 Owner name: CHUANQING DRILLING ENGINEERING CO., LTD. CHANGQING Free format text: FORMER OWNER: LEI KUANCHENG Effective date: 20120516 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 710032 XI'AN, SHAANXI PROVINCE TO: 710018 XI'AN, SHAANXI PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20120516 Address after: 710018 Shaanxi province Xi'an Weiyang Changqing Changqing prosperous Park District Building Room 1207 Co-patentee after: XI'AN YUXING PETROLEUM MACHINERY OF NEW TECHNOLOGY DEVELOPMENT Co.,Ltd. Patentee after: CHINA NATIONAL PETROLEUM CORPORATION CHUANQING DRILLING ENGINEERING COMPANY LIMITED CHANGQING DOWNHOLE TECHNOLOGY Co. Co-patentee after: Lei Kuancheng Address before: 710032 Xi'an, Zhejiang Province, Qin Road, No. 9, No. Patentee before: Lei Kuancheng |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110629 |