CN205117286U - Forcefully opening tool for subsurface safety valve - Google Patents

Forcefully opening tool for subsurface safety valve Download PDF

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Publication number
CN205117286U
CN205117286U CN201520911176.2U CN201520911176U CN205117286U CN 205117286 U CN205117286 U CN 205117286U CN 201520911176 U CN201520911176 U CN 201520911176U CN 205117286 U CN205117286 U CN 205117286U
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CN
China
Prior art keywords
safety valve
urceolus
central tube
lock dog
sealing
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
Application number
CN201520911176.2U
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Chinese (zh)
Inventor
董世超
刘志龙
刘海英
崔超
邹剑
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China National Offshore Oil Corp CNOOC
CNOOC Energy Technology and Services Ltd
CNOOC China Co Ltd Tianjin Branch
Original Assignee
China National Offshore Oil Corp CNOOC
CNOOC Energy Technology and Services Ltd
CNOOC China Co Ltd Tianjin Branch
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Filing date
Publication date
Application filed by China National Offshore Oil Corp CNOOC, CNOOC Energy Technology and Services Ltd, CNOOC China Co Ltd Tianjin Branch filed Critical China National Offshore Oil Corp CNOOC
Priority to CN201520911176.2U priority Critical patent/CN205117286U/en
Application granted granted Critical
Publication of CN205117286U publication Critical patent/CN205117286U/en
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Abstract

The utility model relates to an instrument of mine such as oil well, gas well downhole safety valve discloses a forcefully opening tool for subsurface safety valve, main drags for device and sealing device including throwing, throws to drag for the device and mainly comprise fishing head, center tube, urceolus, is equipped with the elastic claw between center tube and the urceolus and is used for fixing, and locking piece and the shell fragment that is used for locking the relief valve is installed to the urceolus, sealing device includes seating nipple, top connection and lower clutch down, the two -way seal structure of twice about lower seating nipple is provided with. When the downhole safety valve can't normally be opened, go into down forcefully opening tool for subsurface safety valve and open the downhole safety valve, throw the locking piece that drags for the device after opening with relief valve go into operation by force utensil and downhole safety valve relatively fixed, sealing device's the two -way seal structure of upper and lower twice on with the downhole safety valve lower extreme sealed, guarantee that oil pipe is inside to keep apart with downhole safety valve parts and sleeve pipe, consequently the utility model discloses simplify the borehole operation procedure, improve the operating efficiency, increase the operation security.

Description

A kind of forcible unlocking tool of downhole safety valve
Technical field
The utility model relates to a kind of instrument for the down-hole such as oil well, gas well safety valve, specifically, relates to a kind of forcible unlocking tool of downhole safety valve.
Background technology
Storm valve be a kind of for preventing blowout, well overflows, and ensures the instrument of Oil/gas Well normal operation.In case of emergency storm valve is closed, and when normally producing, storm valve is opened.Because subsurface environment is severe, storm valve may break down and cannot normally open, and needs to mention tubing string under regular situation, takes out storm valve, wastes time and energy.And apply forcible unlocking tool of downhole safety valve above-mentioned situation can be avoided to occur.
Forcible unlocking tool of downhole safety valve is mainly used in situation about cannot open after storm valve breaks down, and it can ensure Oil/gas Well normal production operation, have safe and reliable, sealing is strong, the advantage such as with low cost.
Such as the patent document of Chinese notification number 102409999A proposes a kind of forcible unlocking tool of downhole safety valve, and comprise seating portion and the body of integrative-structure, wherein body is hollow structure, is provided with hydrophthalmia hole; Seating portion is provided with 11/16 of band salvaging footpath " UN10 joint.It is lightweight, is convenient to manpower and carries out steel wire jarring operation, successfully can drive safety valve by force; Safety is high, and operating risk is little.
But the above safety valve tool that goes into operation by force only has and opens function by force, and do not have sealing device, also do not have retaining mechanism, the tool that safety valve cannot be gone into operation by force is fixed on the well section broken down.
Utility model content
To be solved in the utility model is that the existing safety valve tool that goes into operation by force does not have the technical problem of lock sealing function, provide a kind of forcible unlocking tool of downhole safety valve, can realize sealing at tubing string internal locking, under fixed tubular column prerequisite, oil well is normally produced, simplify underground work program, improve operating efficiency, increase operational security.
In order to solve the problems of the technologies described above, the utility model is achieved by following technical scheme:
A kind of forcible unlocking tool of downhole safety valve, comprises pulling device (1) and sealing device (2);
Described pulling device (1) comprises central tube (1-3), and central tube (1-3) upper end is connected with fishing head (1-1), and lower end is connected with the lower seating nipple (2-5) of sealing device (2); Central tube (1-3) is set with urceolus (1-7), and is fixed by urceolus (1-7) by the first shear pin (1-6); Central tube (1-3) top is fixed with elastic claw (1-8) by the second shear pin (1-9), and urceolus (1-7) offers upper and lower two square notches corresponding to elastic claw (1-8), respectively in order to be connected with its bullet pawl under different operating state; Urceolus (1-7) apertured is to install lock dog (1-4), and lock dog (1-4) is fixed on urceolus (1-7) by shell fragment (1-5); Central tube (1-3) is provided with shoulder, to be ejected by lock dog (1-4) when central tube (1-3) moves downward relative to urceolus (1-7) in the position of lock dog (1-4) top; And when central tube (1-3) moves upward relative to urceolus (1-7), lock dog (1-4) loses the active force of central tube (1-3) shoulder, shell fragment (1-5) makes lock dog (1-4) retract;
Sealing device (2) comprises lower seating nipple (2-5), lower seating nipple (2-5) connects top connection (2-1) and lower contact (2-9) in two ends up and down respectively, the upper and lower of lower seating nipple (2-5) is respectively arranged with one Bidirectional seal structure, and this twice Bidirectional seal structure is fixed by top connection (2-1) and lower contact (2-9) respectively.
Wherein, described Bidirectional seal structure comprises support ring (2-2), spacer ring (2-3), V-type circle (2-4), gasket ring (2-6), dump bolt (2-7), tightening pin (2-8); Spacer ring (2-3) is fixed on lower seating nipple (2-5) by dump bolt (2-7), and spacer ring (2-3) two ends are symmetrical is respectively disposed with V-type circle (2-4), support ring (2-2) and gasket ring (2-6); It is protruding that spacer ring (2-3) two ends have the V-arrangement matched with V-type circle (2-4), and the end face that support ring (2-2) is relative with V-type circle (2-4) has the v-depression matched with V-type circle (2-4).
The beneficial effects of the utility model are:
The utility model freely can go into the well and proposes in well, when storm valve cannot normally be opened, under enter a kind of forcible unlocking tool of downhole safety valve storm valve opened, after opening, the lock dog of the pulling device tool that gone into operation by force by safety valve is relative with storm valve fixing, and guarantee producing well normally carries out; The elastic claw structure of pulling device can to ensure that when normal work the safety valve tool that goes into operation by force cannot move; Storm valve upper and lower side seals by the Bidirectional seal structure of twice up and down of sealing device, ensures oil pipe inside and downhole safety valve member and casing off; Therefore the utility model safety is high, and operating risk is little.
Accompanying drawing explanation
Fig. 1 is the structural representation of forcible unlocking tool of downhole safety valve provided by the utility model;
Fig. 2 is the structural representation of pulling part in Fig. 1;
Fig. 3 is the structural representation of hermetic unit in Fig. 1;
Fig. 4 is the working state figure of forcible unlocking tool of downhole safety valve provided by the utility model;
Fig. 5 is the structural representation of pulling part in Fig. 4;
Fig. 6 is the structural representation of lock dog;
Fig. 7 is the structural representation of shell fragment.
In figure: 1: pulling part; 2: hermetic unit; 3: pin; 1-1: fishing head; 1-2: fixing pin; 1-3: central tube; 1-4: lock dog; 1-5: shell fragment; 1-6: the first shear pin; 1-7: urceolus; 1-8: elastic claw; 1-9: the second shear pin; 2-1: top connection; 2-2: support ring; 2-3: spacer ring; 2-4:V type circle; 2-5: lower seating nipple; 2-6: gasket ring; 2-7: dump bolt; 2-8: tightening pin; 2-9: lower contact.
Detailed description of the invention
For content of the present utility model, feature and effect can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
As shown in Figure 1, present embodiments provide a kind of forcible unlocking tool of downhole safety valve, mainly comprise pulling device 1 and sealing device 2 two parts, pulling device 1 makes sealing device 2 action.
As shown in Figure 2, described pulling device 1 is made up of fishing head 1-1, fixing pin 1-2, central tube 1-3, lock dog 1-4, shell fragment 1-5, the first shear pin 1-6, urceolus 1-7, elastic claw 1-8, the second shear pin 1-9.Central tube 1-3 two ends are provided with external screw thread, and upper end is used for being connected with fishing head 1-1, and lower end is used for being connected with lower seating nipple 2-5.Fishing head 1-1 and central tube 1-3 is threaded connection, and is fixed by fixing pin 1-2.The outer surface of revolution of central tube 1-3 offers two symmetrical grooves, in order to install elastic claw 1-8; Have bullet pawl bottom elastic claw 1-8, top is fixed by the second shear pin 1-9 and central tube 1-3.Urceolus 1-7 is set in outside the middle and lower part of central tube 1-3, is connected and fixed by the first shear pin 1-6 and central tube 1-3.Urceolus 1-7 corresponds to elastic claw 1-8 and offers square notch and lower square notch, is connected respectively in order to two operating positions at elastic claw 1-8 with its bullet pawl.Also offer two symmetrical square openings in the middle part of urceolus 1-6, in order to install lock dog 1-4, lock dog 1-4 has cross notch with mounting elastic sheet 1-5, and shell fragment 1-5 end is inserted urceolus 1-7 thus by its elastic force, lock dog 1-4 is fixed on urceolus 1-7.The position of central tube 1-3 above lock dog 1-4 is provided with shoulder, lock dog 1-4 can be ejected when central tube 1-3 moves downward relative to urceolus 1-7, thus storm valve and forcible unlocking tool of downhole safety valve is fixed by lock dog 1-4.And when central tube 1-3 moves upward relative to urceolus 1-7, after lock dog 1-4 loses central tube 1-3 shoulder active force, shell fragment 1-5 can make lock dog 1-4 retract, unlock.
As shown in Figure 3, described sealing device 2 is made up of top connection 2-1, support ring 2-2, spacer ring 2-3, V-type circle 2-4, lower seating nipple 2-5, gasket ring 2-6, dump bolt 2-7, tightening pin 2-8, lower contact 2-9.Lower seating nipple 2-5 upper end is provided with internal thread, in order to connect central tube 1-3, is fixed further by pin 3 with central tube 1-3 simultaneously.The lower upper and lower two ends of seating nipple 2-5 are respectively arranged with external screw thread, respectively in order to connect top connection 2-1 and lower contact 2-9; Lower contact 2-9 is provided with four screwed holes makes itself and lower seating nipple 2-5 fix for installing tightening pin 2-8.The upper and lower of lower seating nipple 2-5 is respectively arranged with one Bidirectional seal structure, and Bidirectional seal structure is fixed by top connection 2-1 and lower contact 2-9 respectively.Bidirectional seal structure specifically comprises support ring 2-2, spacer ring 2-3, V-type circle 2-4, gasket ring 2-6, dump bolt 2-7.Spacer ring 2-3 is fixed on the outer surface of revolution of lower seating nipple 2-5 by dump bolt 2-7, and spacer ring 2-3 two ends are symmetrical is respectively disposed with V-type circle 2-4, support ring 2-2 and gasket ring 2-6; Spacer ring 2-3 two ends have the V-arrangement projection matched with V-type circle 2-4, and the end face that support ring 2-2 is relative with V-type circle 2-4 has the v-depression matched with V-type circle 2-4, thus forms two way seal function, form stable, good seal.
As shown in Figure 4 and Figure 5, the operating principle of a kind of forcible unlocking tool of downhole safety valve of the present utility model is as follows:
This forcible unlocking tool of downhole safety valve G.I.H, stop descending after urceolus 1-7 outer shoulder place contacts with storm valve instrument, fishing head 1-1, central tube 1-3 and sealing device 2 continue descending, the first shear pin 1-6 for connecting central tube 1-3 and urceolus 1-7 is cut off, elastic claw 1-8 is in company with central tube 1-3 downward movement together, the bullet pawl of elastic claw 1-8 enters lower square notch by the upper square notch of urceolus 1-7, lock dog 1-4 also ejects and locks with storm valve instrument under the effect of central tube 1-3 shoulder simultaneously, sealing device is about to safety valve valve plate for 2 times and is opened, and by its upper and lower Bidirectional seal structure, safety valve upper and lower port is sealed, oil well carries out normal oil extraction operation.
When this forcible unlocking tool of downhole safety valve is proposed well head by needs, fishing head 1-1, central tube 1-3 and sealing device 2 are up, now lock dog 1-4 and storm valve instrument and urceolus 1-7 are fixed together, central tube 1-3 is fixed on by the second shear pin 1-9 in elastic claw 1-8 top, and the bullet pawl of elastic claw 1-8 bottom is fixed on the lower square notch of urceolus 1-7.When fishing head 1-1 and central tube 1-3 carry, the the second shear pin 1-9 connecting elastic claw 1-8 and central tube 1-3 cuts off by upper lifting force, and central tube 1-3 moves, and lock dog 1-4 also retracts under shell fragment 1-5 effect, central tube 1-3 carries on continuing, then proposed from pit shaft by forcible unlocking tool of downhole safety valve.
Although be described preferred embodiment of the present utility model by reference to the accompanying drawings above; but the utility model is not limited to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; do not departing under the ambit that invention aim and claim protect, can also make the concrete conversion of a lot of form, these all belong within protection domain of the present utility model.

Claims (2)

1. a forcible unlocking tool of downhole safety valve, is characterized in that, comprises pulling device (1) and sealing device (2);
Described pulling device (1) comprises central tube (1-3), and central tube (1-3) upper end is connected with fishing head (1-1), and lower end is connected with the lower seating nipple (2-5) of sealing device (2); Central tube (1-3) is set with urceolus (1-7), and is fixed by urceolus (1-7) by the first shear pin (1-6); Central tube (1-3) top is fixed with elastic claw (1-8) by the second shear pin (1-9), and urceolus (1-7) offers upper and lower two square notches corresponding to elastic claw (1-8), respectively in order to be connected with its bullet pawl under different operating state; Urceolus (1-7) apertured is to install lock dog (1-4), and lock dog (1-4) is fixed on urceolus (1-7) by shell fragment (1-5); Central tube (1-3) is provided with shoulder, to be ejected by lock dog (1-4) when central tube (1-3) moves downward relative to urceolus (1-7) in the position of lock dog (1-4) top; And when central tube (1-3) moves upward relative to urceolus (1-7), lock dog (1-4) loses the active force of central tube (1-3) shoulder, shell fragment (1-5) makes lock dog (1-4) retract;
Sealing device (2) comprises lower seating nipple (2-5), lower seating nipple (2-5) connects top connection (2-1) and lower contact (2-9) in two ends up and down respectively, the upper and lower of lower seating nipple (2-5) is respectively arranged with one Bidirectional seal structure, and this twice Bidirectional seal structure is fixed by top connection (2-1) and lower contact (2-9) respectively.
2. a kind of forcible unlocking tool of downhole safety valve according to claim 1, it is characterized in that, described Bidirectional seal structure comprises support ring (2-2), spacer ring (2-3), V-type circle (2-4), gasket ring (2-6), dump bolt (2-7), tightening pin (2-8); Spacer ring (2-3) is fixed on lower seating nipple (2-5) by dump bolt (2-7), and spacer ring (2-3) two ends are symmetrical is respectively disposed with V-type circle (2-4), support ring (2-2) and gasket ring (2-6); It is protruding that spacer ring (2-3) two ends have the V-arrangement matched with V-type circle (2-4), and the end face that support ring (2-2) is relative with V-type circle (2-4) has the v-depression matched with V-type circle (2-4).
CN201520911176.2U 2015-11-16 2015-11-16 Forcefully opening tool for subsurface safety valve Active CN205117286U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520911176.2U CN205117286U (en) 2015-11-16 2015-11-16 Forcefully opening tool for subsurface safety valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520911176.2U CN205117286U (en) 2015-11-16 2015-11-16 Forcefully opening tool for subsurface safety valve

Publications (1)

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CN205117286U true CN205117286U (en) 2016-03-30

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Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109209249A (en) * 2018-10-16 2019-01-15 中国海洋石油集团有限公司 A kind of flow string, drilling tool and producing well

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109209249A (en) * 2018-10-16 2019-01-15 中国海洋石油集团有限公司 A kind of flow string, drilling tool and producing well

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Legal Events

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C14 Grant of patent or utility model
GR01 Patent grant
CP01 Change in the name or title of a patent holder
CP01 Change in the name or title of a patent holder

Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing

Co-patentee after: CNOOC Energy Development Co., Ltd.

Patentee after: China Offshore Oil Group Co., Ltd.

Co-patentee after: Tianjin Branch of China Sea Prtroleum (China) Co., Ltd.

Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing

Co-patentee before: CNOOC Energy Development Co., Ltd.

Patentee before: China National Offshore Oil Corporation

Co-patentee before: Tianjin Branch of China Sea Prtroleum (China) Co., Ltd.