CN202090881U - Hydraulic drive double-flashboard BOP (blowout preventer) with integral-type totally-enclosed flashboard - Google Patents
Hydraulic drive double-flashboard BOP (blowout preventer) with integral-type totally-enclosed flashboard Download PDFInfo
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- CN202090881U CN202090881U CN2011202119163U CN201120211916U CN202090881U CN 202090881 U CN202090881 U CN 202090881U CN 2011202119163 U CN2011202119163 U CN 2011202119163U CN 201120211916 U CN201120211916 U CN 201120211916U CN 202090881 U CN202090881 U CN 202090881U
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- well head
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Abstract
A hydraulic drive double-flashboard BOP (blowout preventer) with an integral-type totally-enclosed flashboard comprises a casing, an upper-layer flashboard system and a lower-layer flashboard system, wherein the upper-layer flashboard system is parallel to the lower-layer flashboard system. The hydraulic drive double-flashboard BOP is characterized in that upper-layer flashboards in the upper-layer flashboard system are two pieces of symmetrical semi-seal flashboards, and a symmetrical hydraulic drive and hand-operated lock mechanism is adopted to seal and prevent the blowout from the two side of a well head channel in the casing to the middle; a lower-layer flashboard in the lower-layer flashboard system is the integral-type totally-enclosed flashboard, and an asymmetrical full hydraulic drive mechanism is adopted to seal and prevent the blowout from one side of the well head channel in the casing to the other side of the well head channel; the two symmetrical upper-layer flashboards are composite flashboards made of iron steel parts and rubber parts, and the rubber parts are in soft contact and seal with the casing and a drill rod or an oil pipe; and the lower-layer flashboard is an integral structural alloy steel part and is in hard contact and seal with elastic valve seats above and below the well head channel in the casing. The hydraulic drive double-flashboard BOP with the integral-type totally-enclosed flashboard has the characteristics of small volume, novel structure, easiness in control, good sealing performance, long service lift and the like.
Description
Affiliated technical field
The utility model relates to petroleum machinery, the innovative design of " double ram type preventer " in the wellhead equipment.
Background technology
In oilfield drilling and workover treatment process, in order to prevent blowout or well kick accident, must preventer be installed, to guarantee the safety in production of oil gas field at well head." ram preventer " has single disc and double disc two major types, wherein: " double ram type preventer " with its can the shutoff well head in the annular space of band drilling rod or oil pipe, can seal the dual-use function of whole well head entirely again, and be subjected to vast oil gas field client's favor.But present " double ram type preventer " the one, volume is big, size is high, is unfavorable for and other drilling-production equipment supporting operation; The 2nd, upper and lower two-layer flashboard all is combined type flashboards of steel and iron parts folder rubber parts, and its rubber parts is very easily damaged under high pressure, corrosivity and impure oil-gas reactivation, influences the application life of product; The 3rd, the upper and lower two-layer flashboard that is used to seal well head all is two of symmetry, from the relative motion shutoff blowout prevention of well head both sides; The contact slit of two shoe brake plates in the middle of well head is easy under the effect of high-pressure oil gas separately, thereby loses the blowout prevention function.Therefore, also must design be equipped with baroque manual-lock, increase the manufacturing cost of product and the complexity of operation.
Summary of the invention
The purpose of this utility model is to design two kinds of encapsulating methods of a kind of employing, and volume is less, control convenience, dependable performance, longer double ram type preventer of life-span.
The utility model is made up of housing, the upper strata flashboard system that is parallel to each other and flashboard system of lower floor, its difference is: the upper strata flashboard in the housing in the flashboard system of upper strata be two symmetries partly seal flashboard, adopt the hydraulic-driven and the manual locking mechanism of both sides symmetry commonly used, shutoff blowout prevention in the middle of two side direction of well head passage in the housing; Lower floor's flashboard in the flashboard system of lower floor is a monolithic blind rams, adopts the asymmetric full hydraulic drive of side mechanism, and a side direction opposite side of well head passage carries out the shutoff blowout prevention in the housing; Wherein: the upper strata flashboard of two symmetries all is combined type flashboards of steel and iron parts folder rubber parts, relies on to be clipped in flashboard top and middle rubber parts, with upper strata flashboard recreation room and drilling rod in the well head passage or the soft contact seal of oil pipe in the housing; Lower floor's flashboard is whole structural alloy steel part, be installed in the housing lower floor's flashboard recreation room with above the well head passage intersection with two following hard contact seals of elastic seat.
Because upper strata of the present utility model flashboard system and the parallel distribution in housing of flashboard system of lower floor are so thickness is limited, volume is less.Lower floor's flashboard is the blind rams of an integral body, from a side well head passage is carried out shutoff, therefore can not separate from the centre under the effect of high-pressure oil gas; So do not need manual locking mechanism, do not need the hydraulic drive mechanism of both sides yet, simplify product structure, reduced cost of production.Upper and lower two elastic seats and lower floor's flashboard in the flashboard system of lower floor all adopt the manufacturing of alloy structure steel, through Quenching Treatment; So the combined type flashboard than steel and iron parts folder rubber parts in the like product is more wear-resistant, the life-span is longer.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing:
Fig. 1 is an overall structure full section schematic diagram of the present utility model.
Fig. 2 is positive facial contour of the utility model and hydraulic oil pore size distribution (shown in the dotted line) schematic diagram.
Fig. 3 is A-A among the utility model Fig. 1 (housing side) cross-sectional schematic.
Fig. 4 is B-B among the utility model Fig. 1 (lower floor's flashboard horizontal plane) cross-sectional schematic.
Component title in the accompanying drawing shown in the label is as follows:
1, housing, 2, the upper strata flashboard, 3, the stiff rod piston, 4, the upside door-plate, 5, hydraulic cylinder, 6, lock shaft, 7, cylinder cap, 8, thread connector, 9, sealing ring, 10, thick bolt, 11, the downside door-plate, 12, bolt, 13, wavy spring, 14, lower floor's flashboard, 15, elastic seat, 16, Sealing shield ring, 17, fixed piston, 18, side door support, 19, the fuel feeding end cap, 20, piece together jack panel, 21, long thread connector, 22, steel oil pipe, 23, the oil nozzle flange, 24, stove bolt, 25, oilhole.
The specific embodiment
Among Fig. 1, Fig. 2 and Fig. 3, the utility model is installed with upper strata flashboard system and flashboard system of lower floor abreast based on housing (1).The main body of housing (1) is a rectangle, and the position, center of upper and lower surface is the porose flange that protrudes, use with above the well head and following miscellaneous equipment link; In the middle of the housing (1) is the well head passage that connects from top to bottom, is used for down-hole drilling operation; The two sides, the left and right sides of housing (1), dividing two-layer up and down is the flashboard recreation room of two parallel perforations and tens screwed holes that periphery is symmetrically distributed, and is respectively applied for upper strata flashboard system and the flashboard system of lower floor of installing.Two main shafts of the upper and lower two-layer flashboard recreation room in the housing (1) all intersect vertically with the main shaft of well head passage, to guarantee the accuracy of upper and lower two-layer flashboard system to the well head channel seal.It is oblate that the cross section of the upper strata flashboard recreation room of housing (1) is, and the cross section of lower floor's flashboard recreation room is rectangle, so as with upper strata flashboard (2) and lower floor's flashboard (14) cooperating of respective cross-section profile.Four oil nozzle flanges (23) are being fixed with tens stove bolts (24) in the front of housing (1), respectively with housing (1) in vertical the communicating of four oilholes (25), and link with external conduit under fluid pressure.Wherein: the top is used for two oilholes (25) of upper strata flashboard system drive, through the two sides, the left and right sides of housing (1); The below is used for two oilholes (25) of lower floor's flashboard system drive, only is positioned at a side of housing (1), passes its left side or the right side.
Upper strata flashboard system and existing like product are similar, its upper strata flashboard (2) be two symmetries partly seal flashboard, the outside is connected with manual locking mechanism with the monosymmetric hydraulic-driven of housing (1) by " ⊥ " shape groove; Accompany rubber seal in the middle semicircle breach and in the arc groove of top, in the middle of two side direction of the interior well head passage of housing (1), the annular space of well head passage and drilling rod or oil pipe is carried out the shutoff blowout prevention.Hydraulic-driven in the flashboard system of upper strata and manual locking mechanism are made up of stiff rod piston (3), upside door-plate (4), hydraulic cylinder (5), lock shaft (6), cylinder cap (7), thread connector (8), many sealing rings (9) and thick bolt (10).The center of upside door-plate (4) is the through hole that the two seals groove is arranged, and has cut a circle seal groove on the smooth medial surface; Center position has the big pit of a band oilhole (25) on the lateral surface, and the outward flange of big pit is several screwed holes, and a side of big pit also has the small rut of a band oilhole (25); Around the upside door-plate (4) is several bolts hole, is fixed in several thick bolts (10) above the both sides of housing (1), and the upper strata flashboard recreation room in the housing (1) is sealed.Bar one end that has of stiff rod piston (3) passes the centre bore of upside door-plate (4), and its end is connected with " ⊥ " shape groove in upper strata flashboard (2) outside; Stiff rod piston (3) other end is a disk, has cut the two seals groove on the circumference of disk, and the center of end face is processed with a step-like tapped blind hole.The centre of lock shaft (6) is the boss platform, and half is a screw rod, and second half is cylindrical polished rod, hexagonal or four jiaos of holes in being processed with on the end face of cylindrical polished rod; Screw portion is connected with the stairstepping tapped blind hole of stiff rod piston (3), and cylindrical polished rod is connected with the centre bore of cylinder cap (7).The center of cylinder cap (7) is the through hole that the two seals groove is arranged, and there is the pit of small one and large one two band oilholes (25) inboard, and the outside is the sleeve pipe of perforate on the tube wall, and several bolts hole are arranged around the spacer flanger.The inboard of the outside of upside door-plate (4) and cylinder cap (7), with its small one and large one two the band oilholes (25) pits, block the two ends of the hydraulic cylinder (5) that is enclosed within on stiff rod piston (3) the disk cylindrical and parallel with it steel oil pipe (22), with number deputy thread connector (8), be solidified as a whole by the bolt hole on screwed hole on the side door plate (4) and cylinder cap (7) spacer flanger.After the cylindrical polished rod of lock shaft (6) passes the centre bore of cylinder cap (7), interior hexagonal on its end face or four jiaos of holes, under the rotation of external manual hexagonal or four jiaos of spanners, after making the inboard plane contact of middle boss platform of axle and cylinder cap (7), can promote the relative locking of stiff rod piston (3) of both sides, prevent that two upper strata flashboards (2) from separating under the effect of high-pressure oil gas in the middle of the well head passage with upper strata flashboard (2).
Housing (1) top drives two hydraulic pressure oilholes (25) of upper strata flashboard system: one enters in the hydraulic cylinder (5) through oil nozzle flange (23), housing (1), upside door-plate (4), steel oil pipe (22) and cylinder cap (7), promotes the stiff rod piston (3) and the inside motion shutoff of upper strata flashboard (2) while of both sides.Another enters in the hydraulic cylinder (5) through oil nozzle flange (23), housing (1) and upside door-plate (4), under the situation of removing manual locking, can promote stiff rod piston (3) the outwards motion simultaneously of both sides, opens upper strata flashboard (2).The junction of each part, each part oilhole (25) and its relative motion place all with 1 or 2 sealing ring (9) reinforced seals that acrylonitrile-butadiene rubber is manufactured, prevent oil gas or hydraulic fluid leak in hydraulic-driven and manual locking mechanism.
Flashboard system of lower floor is a unique design of the present utility model: lower floor's flashboard (14) is a monolithic blind rams, adopts an asymmetric side full hydraulic drive mechanism, carries out the shutoff blowout prevention from a side direction opposite side of the interior well head passage of housing (1).In housing (1) lower floor's flashboard recreation room and above the well head passage intersection and below, all be processed with the annular distance step, in adorn two elastic seats (15), with the top and following hard contact seal of lower floor's flashboard (14).Two elastic seats (15) all adopt structural alloy steel tubing to manufacture, and the one end has all been cut the round platform rank, have all cut the two seals groove on its outer circumference surface; The wavy spring (13) that ring-type all is equipped with at place, round platform rank all is equipped with sealing ring (9) in the two seals groove, make it to have certain elasticity distance and sealing performance.Under the effect of down-hole high pressure oil gas, lower floor's flashboard (14) of shutoff can be close to top elastic seat (15), even without locking mechanism, also can not separate or slippage from the centre.Among Fig. 4, lower floor's flashboard (14) adopts the rectangle material of a structural alloy steel to make; On the plane of length direction one end, cut the breach of circular arc, the diameter of breach is more than or equal to the diameter of well head passage; At the end face center of the length direction other end, be drilled with bright and clean piston blind hole, use with fixed piston (17) movingly; The place, aperture of piston blind hole is processed with one section internal thread, is used for installing Sealing shield ring (16).The width of lower floor's flashboard (14) is greater than the diameter of the interior well head passage of housing (1), less than the length in the interior lower floor of housing (1) flashboard recreation room rectangle cross section; The thickness of lower floor's flashboard (14) is less than the height in the interior lower floor of housing (1) flashboard recreation room rectangle cross section; Make it can activity freely, can guarantee sealing performance again.Full hydraulic drive mechanism in the flashboard system of lower floor is made up of Sealing shield ring (16), fixed piston (17), side door support (18), fuel feeding end cap (19), assembly jack panel (20), many sealing rings (9) and the secondary stock thread connector of number (21).The butt end of fixed piston (17) is inserted in the piston blind hole of lower floor's flashboard (14), and the import department of piston blind hole is with Sealing shield ring (16) sealing; The other parts end of fixed piston (17) passes the middle hole of Sealing shield ring (16), side door support (18) and fuel feeding end cap (19), and it is fixing to piece together jack panel (20) with two; Side door support (18) and fuel feeding end cap (19) are passed its peripheral bolt hole by the secondary stock thread connector of number (21), are fixed on the side that housing (1) lower floor flashboard recreation room has oilhole (25).The opposite side of lower floor's flashboard recreation room in housing (1), fixing a downside door-plate (11) that only has a sealing ring (9) with several bolts (12), lower floor's flashboard recreation room, lower floor's flashboard (14), Sealing shield ring (16) and fixed piston (17) in the housing (1) is being in the environment of a sealing works.Fixed piston (17) inwardly begins from the end face of butt end, is drilled with two parallel long oil holes; On fixed piston (17) other end inserts part circumference in the fuel feeding end cap (19), be drilled with two with the vertical short oil hole that communicates of parallel long oilhole, as the import of hydraulic oil; On the end face of the butt end of fixed piston (17), an outlet in two parallel long oilholes is blocked, on the circumference on its butt end opposite side next door, bore a short oil hole that vertically communicates with it as outlet, make two parallel long oil hole oil-outs lay respectively at the both sides of the butt end of fixed piston (17).
Drive two hydraulic circuits of flashboard system of lower floor, all by oilhole (25) and oil groove in oil nozzle flange (23), housing (1), side door support (18), fuel feeding end cap (19) body, the parallel long oilhole in fixed piston (17) enters in the piston blind hole of lower floor's flashboard (14) again; When the end face oilhole of the butt end of fixed piston (17) is fuel-displaced, can promotes lower floor's flashboard (14) and deviate from fixed piston (17) motion, the well head passage in the shutoff housing (1); When the vertical short oil hole on the butt end opposite side circumference of fixed piston (17) is fuel-displaced, can promote lower floor's flashboard (14) towards fixed piston (17) motion, open the interior well head passage of housing (1) with the circular arc cutaway on lower floor's flashboard (14).Equally, the junction of each part, each part oilhole (25) and its relative motion place all with 1 or 2 sealing ring (9) reinforced seals that acrylonitrile-butadiene rubber is manufactured, prevent oil gas or hydraulic fluid leak in flashboard system of lower floor.
Claims (8)
1. the double ram type preventer that surges of a monolithic blind rams, formed by housing, the upper strata flashboard system that is parallel to each other and flashboard system of lower floor, its difference is: the upper strata flashboard (2) in the flashboard system of the interior upper strata of housing (1) be two symmetries partly seal flashboard, adopt the hydraulic-driven and the manual locking mechanism of both sides symmetry commonly used, from the middle shutoff blowout prevention of two side direction of the interior well head passage of housing (1); Lower floor's flashboard (14) in the flashboard system of lower floor is a monolithic blind rams, adopts the asymmetric full hydraulic drive of side mechanism, carries out the shutoff blowout prevention from a side direction opposite side of the interior well head passage of housing (1); Wherein: the upper strata flashboard (2) of two symmetries all is combined type flashboards of steel and iron parts folder rubber parts, and dependence is clipped in flashboard top and middle rubber parts, with upper strata flashboard recreation room and interior drilling rod or the soft contact seal of oil pipe of well head passage in the housing (1); Lower floor's flashboard (14) is whole structural alloy steel part, be installed in housing (1) interior lower floor flashboard recreation room with above the well head passage intersection with following two elastic seats (15) contact seal firmly.
2. the double ram type preventer that surges according to claim 1, it is characterized in that: the main body of housing (1) is a rectangle, the position, center of upper and lower surface is the porose flange that protrudes, in the middle of the housing (1) is the well head passage that connects from top to bottom, the two sides, the left and right sides of housing (1), dividing two-layer up and down is the flashboard recreation room of two parallel perforations and tens screwed holes that periphery is symmetrically distributed; It is oblate that the cross section of the upper strata flashboard recreation room of housing (1) is, and the cross section of lower floor's flashboard recreation room (1) is rectangle.
3. the double ram type preventer that surges according to claim 1 is characterized in that: four oil nozzle flanges (23) are being fixed with tens stove bolts (24) in the front of housing (1), respectively with interior vertical the communicating of four oilholes (25) of housing (1); Wherein: the top is used for two oilholes (25) of upper strata flashboard system drive, through the two sides, the left and right sides of housing (1); The below is used for two oilholes (25) of lower floor's flashboard system drive, only is positioned at a side of housing (1), passes its left side or the right side.
4. the double ram type preventer that surges according to claim 1 is characterized in that: be installed in two elastic seats (15) of housing (1) interior lower floor flashboard recreation room and well head passage intersection, all adopt structural alloy steel tubing to manufacture; The one end has all been cut the round platform rank, has all cut the two seals groove on its outer circumference surface; The wavy spring (13) that ring-type all is equipped with at place, round platform rank all is equipped with sealing ring (9) in the two seals groove.
5. the double ram type preventer that surges according to claim 1 is characterized in that: lower floor's flashboard (14) adopts the rectangle material of a structural alloy steel to make; On the plane of length direction one end, cut the breach of circular arc, the diameter of breach is more than or equal to the diameter of well head passage; At the end face center of the length direction other end, be drilled with bright and clean piston blind hole, the place, aperture of piston blind hole is processed with one section internal thread; The width of lower floor's flashboard (14) is greater than the diameter of the interior well head passage of housing (1), less than the length in the interior lower floor of housing (1) flashboard recreation room rectangle cross section; The thickness of lower floor's flashboard (14) is less than the height in the interior lower floor of housing (1) flashboard recreation room rectangle cross section.
6. the double ram type preventer that surges according to claim 1, it is characterized in that: the full hydraulic drive mechanism in the flashboard system of lower floor, be made up of Sealing shield ring (16), fixed piston (17), side door support (18), fuel feeding end cap (19), assembly jack panel (20), many sealing rings (9) and the secondary stock thread connector of number (21); The butt end of fixed piston (17) is inserted in the piston blind hole of lower floor's flashboard (14), and the import department of piston blind hole is with Sealing shield ring (16) sealing; The other parts end of fixed piston (17) passes the middle hole of Sealing shield ring (16), side door support (18) and fuel feeding end cap (19), and it is fixing to piece together jack panel (20) with two; Side door support (18) and fuel feeding end cap (19) are passed its peripheral bolt hole by the secondary stock thread connector of number (21), are fixed on the side that housing (1) lower floor flashboard recreation room has oilhole (25); The opposite side of lower floor's flashboard recreation room in housing (1) is being fixed a downside door-plate (11) that only has a sealing ring (9) with several bolts (12).
7. the double ram type preventer that surges according to claim 1 is characterized in that: fixed piston (17) inwardly begins from the end face of butt end, is drilled with two parallel long oil holes; On fixed piston (17) other end inserts part circumference in the fuel feeding end cap (19), be drilled with two with the vertical short oil hole that communicates of parallel long oilhole, as the import of hydraulic oil; On the end face of the butt end of fixed piston (17), an outlet in two parallel long oilholes is blocked, on the circumference on butt end opposite side next door, bore a short oil hole that vertically communicates with it as outlet, make two parallel long oil hole oil-outs lay respectively at the both sides of the butt end of fixed piston (17).
8. the double ram type preventer that surges according to claim 1 is characterized in that: the junction of each part, each part oilhole (25) and its relative motion place in flashboard system of lower floor, and all with 1 or 2 sealing ring (9) reinforced seals that acrylonitrile-butadiene rubber is manufactured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202119163U CN202090881U (en) | 2011-06-15 | 2011-06-15 | Hydraulic drive double-flashboard BOP (blowout preventer) with integral-type totally-enclosed flashboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202119163U CN202090881U (en) | 2011-06-15 | 2011-06-15 | Hydraulic drive double-flashboard BOP (blowout preventer) with integral-type totally-enclosed flashboard |
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| Publication Number | Publication Date |
|---|---|
| CN202090881U true CN202090881U (en) | 2011-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202119163U Expired - Fee Related CN202090881U (en) | 2011-06-15 | 2011-06-15 | Hydraulic drive double-flashboard BOP (blowout preventer) with integral-type totally-enclosed flashboard |
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| CN (1) | CN202090881U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422039A (en) * | 2015-12-16 | 2016-03-23 | 常熟市虹桥铸钢有限公司 | Blowout preventer shell |
| WO2018129620A1 (en) * | 2017-01-16 | 2018-07-19 | Dreco Energy Services Ulc | Multifunction blowout preventer |
| US10597968B2 (en) | 2015-07-09 | 2020-03-24 | Dreco Energy Services Ulc | Modified stuffing box |
| CN111188589A (en) * | 2020-01-07 | 2020-05-22 | 姜兴安 | Ram blowout preventer for well control device |
| US10900313B2 (en) | 2016-07-26 | 2021-01-26 | Dreco Energy Services Ulc | Method and apparatus for production well pressure containment for blowout |
| US10920887B2 (en) | 2016-02-10 | 2021-02-16 | Dreco Energy Services Ulc | Anti-extrusion seal arrangement and ram-style blowout preventer |
| US10941628B2 (en) | 2017-09-25 | 2021-03-09 | Dreco Energy Services Ulc | Adjustable blowout preventer and methods of use |
-
2011
- 2011-06-15 CN CN2011202119163U patent/CN202090881U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10597968B2 (en) | 2015-07-09 | 2020-03-24 | Dreco Energy Services Ulc | Modified stuffing box |
| CN105422039A (en) * | 2015-12-16 | 2016-03-23 | 常熟市虹桥铸钢有限公司 | Blowout preventer shell |
| US10920887B2 (en) | 2016-02-10 | 2021-02-16 | Dreco Energy Services Ulc | Anti-extrusion seal arrangement and ram-style blowout preventer |
| US10900313B2 (en) | 2016-07-26 | 2021-01-26 | Dreco Energy Services Ulc | Method and apparatus for production well pressure containment for blowout |
| WO2018129620A1 (en) * | 2017-01-16 | 2018-07-19 | Dreco Energy Services Ulc | Multifunction blowout preventer |
| US11035198B2 (en) | 2017-01-16 | 2021-06-15 | Dreco Energy Services Ulc | Multifunction blowout preventer |
| US10941628B2 (en) | 2017-09-25 | 2021-03-09 | Dreco Energy Services Ulc | Adjustable blowout preventer and methods of use |
| CN111188589A (en) * | 2020-01-07 | 2020-05-22 | 姜兴安 | Ram blowout preventer for well control device |
| CN111188589B (en) * | 2020-01-07 | 2022-01-14 | 濮阳市轮通机械设备修造有限公司 | Ram blowout preventer for well control device |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111228 Termination date: 20200615 |
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| CF01 | Termination of patent right due to non-payment of annual fee |