US4067387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Subsurface well apparatus having flexing means and method of using same
Assignee: Hydril LLC
•
Filing: 1976-06-07
•
Granted: 1978-01-10
•
Expires: 1996-06-07
Abstract
Abstract A surface-controlled subsurface safety valve apparatus and method of utilizing the safety valve to through-the-flowline serviced wells. Both the valve frame and valve operator are provided with ball and socket universal joints to enable passage of the safety valve past restrictions in the flowline resulting from bends and curves in the flowline by flexing the safety valve in moving to and from the subsurface operating location.
Inventors
- 👤 James D. Mott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:09
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/08; E21B31/00; E21B31/12; E21B31/20; E21B34/00; E21B34/06; E21B34/10; E21B34/105; E21B2200/00; E21B2200/04
Claims Analysis
Total Claims: 53
Claim 1
Independent Claim
290 words
A safety valve apparatus adapted for movement through the bore of a well tubing to a desired subsurface location in a well for controlling flow of well fluids through the bore of the well tubing at the subsurface location in response to control signals communicated to the safety valve from a remote location, including: tubular frame means for movement through the bore of the well tubing to and from the desired subsurface location; means with said frame means operable for releasably securing said tubular frame means with the well tubing against relative longitudinal movement thereto at the desired subsurface location; bore closure means mounted with said frame means for movement relative to said frame means to and from an open position enabling flow of well fluids through the bore of the well tubing and a closed position for blocking flow of well fluids through the bore of the well tubing; said tubular frame means forming a downwardly facing annular seat for sealing engagement with said bore closure means for blocking flow of well fluids through the bore of the well tubing; tubular operator means movable relative to said frame means for effecting movement of said bore closure means to and from the open and closed positions, said operator means moving relative to said frame means in response to control signals transmitted to said operator means independently of the well tubing from the remote location for moving said bore closure means; and said tubular frame means having first and second tubular portions and means for connecting said first and second portions for enabling limited angular movement of said first tubular portion relative to said second tubular portion wherein said frame means flexes in moving to and from the desired subsurface location.
Claim 2
Dependent Claim
290 words
A safety valve apparatus adapted for movement through the bore of a well tubing to a desired subsurface location in a well for controlling flow of well fluids through the bore of the well tubing at the subsurface location in response to control signals communicated to the safety valve from a remote location, including: tubular frame means for movement through the bore of the well tubing to and from the desired subsurface location; means with said frame means operable for releasably securing said tubular frame means with the well tubing against relative longitudinal movement thereto at the desired subsurface location; bore closure means mounted with said frame means for movement relative to said frame means to and from an open position enabling flow of well fluids through the bore of the well tubing and a closed position for blocking flow of well fluids through the bore of the well tubing; said tubular frame means forming a downwardly facing annular seat for sealing engagement with said bore closure means for blocking flow of well fluids through the bore of the well tubing; tubular operator means movable relative to said frame means for effecting movement of said bore closure means to and from the open and closed positions, said operator means moving relative to said frame means in response to control signals transmitted to said operator means independently of the well tubing from the remote location for moving said bore closure means; and said tubular frame means having first and second tubular portions and means for connecting said first and second portions for enabling limited angular movement of said first tubular portion relative to said second tubular portion wherein said frame means flexes in moving to and from the desired subsurface location.
Claim 3
Dependent Claim
75 words
The apparatus as set forth in claim 1, wherein: said first tubular portion and said second tubular portion forming a substantially concentric bore through said frame means within said downwardly facing annular seat for providing a flow passage for well fluids; and said means for connecting comprising a spherical head formed on one of said tubular portions with said spherical head received and secured in a socket formed by the other of said tubular portions.
Claim 4
Dependent Claim
32 words
The apparatus as set forth in claim 2, wherein: said first tubular frame portion carries said means for releasably securing said frame means with the well tubing against longitudinal relative movement therebetween.
Claim 5
Dependent Claim
106 words
The apparatus as set forth in claim 2, wherein: said bore closure means includes a rotatable ball-type closure element having a ball opening formed therethrough and a spherical sealing surface engaging said annular seat; and said operator means includes means for rotating said ball-type closure element to and from the open position while sealingly engaging said annular seat by placing said ball opening in communication with said bore by said frame means through said annular seat for enabling flow of well fluids and closed position for placing said ball opening out of communication with said bore of said frame means for blocking flow of well fluids.
Claim 6
Dependent Claim
34 words
The apparatus as set forth in claim 4, wherein: said rotatable ball-type closure element sealing surface having a spherical diameter substantially equal to the outer diameter of said tubular portions of said frame means.
Claim 7
Dependent Claim
90 words
The apparatus as set forth in claim 42, wherein: said first tubular portion carries said means for releasably securing said frame means with the well tubing against relative longitudinal movement therebetween; and said second tubular portion forming a cage means surrounding said ball-type closure element for operably connecting with said ball-type closure element to maintain said spherical surface of said ball-type closure element in sealing engagement with said annular seat formed by said tubular frame means when said ball-type closure element rotates to and from the open and closed position.
Claim 8
Dependent Claim
30 words
The apparatus as set forth in claim 6, wherein: said rotatable ball-type closure element sealing surface having a spherical diameter substantially equal to the outer diameter of said cage means.
Claim 9
Dependent Claim
285 words
A safety valve apparatus adapted for movement through the bore of a well tubing to a desired subsurface location in a well for controlling flow of well fluids through the bore of the well tubing at the subsurface location in response to control signals communicated to the safety valve from a remote location, including: tubular frame means for movement through the bore of the well tubing to and from the desired subsurface location; means with said frame means operable for releasably securing said frame means with the well tubing at the desired location; bore closure means mounted with said frame means for movement relative to said frame means to and from an open position enabling flow of well fluids through the bore of the well tubing and a closed position for blocking flow of well fluids through the bore of the well tubing; said tubular frame means forming a downwardly facing annular seat for sealing engagement with said bore closure means for blocking flow of well fluids through the bore of the well tubing; operator means movable relative to said frame means for effecting movement of said bore closure means to and from the open and closed position, said operator means moving relative tos aid frame means in response to control signals transmitted to said operator means independently of the well tubing from the remote location for moving said bore closure means; and said tubular frame means having first and second tubular portions and universal joint means for connecting said first tubular portion and said second tubular portion for enabling limited angular movement therebetween while blocking longitudinal movement therebetween wherein said frame means flexes while maintaining said first and second portions in fixed longitudinal relationship.
Claim 10
Dependent Claim
285 words
A safety valve apparatus adapted for movement through the bore of a well tubing to a desired subsurface location in a well for controlling flow of well fluids through the bore of the well tubing at the subsurface location in response to control signals communicated to the safety valve from a remote location, including: tubular frame means for movement through the bore of the well tubing to and from the desired subsurface location; means with said frame means operable for releasably securing said frame means with the well tubing at the desired location; bore closure means mounted with said frame means for movement relative to said frame means to and from an open position enabling flow of well fluids through the bore of the well tubing and a closed position for blocking flow of well fluids through the bore of the well tubing; said tubular frame means forming a downwardly facing annular seat for sealing engagement with said bore closure means for blocking flow of well fluids through the bore of the well tubing; operator means movable relative to said frame means for effecting movement of said bore closure means to and from the open and closed position, said operator means moving relative tos aid frame means in response to control signals transmitted to said operator means independently of the well tubing from the remote location for moving said bore closure means; and said tubular frame means having first and second tubular portions and universal joint means for connecting said first tubular portion and said second tubular portion for enabling limited angular movement therebetween while blocking longitudinal movement therebetween wherein said frame means flexes while maintaining said first and second portions in fixed longitudinal relationship.
Claim 11
Dependent Claim
75 words
The apparatus as set forth in claim 8, wherein: said first tubular portion and said second tubular portion forming a substantially concentric bore through said frame means within said downwardly facing annular seat for providing a flow passage for well fluids; and said means for connecting comprising a spherical head formed on one of said tubular portions with said spherical head received and secured in a socket formed by the other of said tubular portions.
Claim 12
Dependent Claim
32 words
The apparatus as set forth in claim 9, wherein: said first tubular frame portion carries said means for releasably securing said frame means with the well tubing against longitudinal relative movement therebetween.
Claim 13
Dependent Claim
107 words
The apparatus as set forth in claim 9, wherein: said bore closure means includes a rotatable ball-type closure element having a ball opening formed therethrough and a spherical sealing surface engaging said annular seat; and said operator means includes means for rotating said ball-type closure element to and from the open position while sealingly engaging said annular seat by placing said ball opening in communication with said bore of said frame means through said annular seat for enabling flow of well fluids and the closed position for placing said ball opening out of communication with said bore of said frame means for blocking flow of well fluids.
Claim 14
Dependent Claim
34 words
The apparatus as set forth in claim 11, wherein: said rotatable ball-type closure element sealing surface having a spherical diameter substantially equal to the outer diameter of said tubular portions of said frame means.
Claim 15
Dependent Claim
90 words
The apparatus as set forth in claim 11, wherein: said first tubular portion carries said means for releasably securing said frame means with the well tubing against relative longitudinal movement therebetween; and said second tubular portion forming a cage means surrounding said ball-type closure element for operably connecting with said ball-type closure element to maintain said spherical surface of said ball-type closure element in sealing engagement with said annular seat formed by said tubular frame means when said ball-type closure element rotates to and from the open and closed position.
Claim 16
Dependent Claim
30 words
The apparatus as set forth in claim 13, wherein: said rotatable ball-type closure element sealing surface having a spherical diameter substantially equal to the outer diameter of said cage means.
Claim 17
Dependent Claim
216 words
A safety valve apparatus adapted for movement through the bore of a well tubing to a desired subsurface location in a well for controlling flow of well fluids through the bore of the well tubing at the subsurface location in response to control signals communicated to the safety valve from a remote location, including: frame means for movement through the bore of the well tubing to and from the desired subsurface location; means with said frame means for releasably securing said frame means with the well tubing at the desired subsurface location; bore closure means mounted with said frame means for movement relative to said frame means to and from an open position enabling flow of well fluids through the bore of the well tubing and a closed position for blocking flow of well fluids through the bore of the well tubing; operator means movable relative to said frame means for effecting movement of said bore closure means to and from the open and closed positions responsive to control signals transmitted to said operator means from the remote location; and said operator means having first and second portions and means for connecting said first and second portions for enabling limited angular movement of said first portion relative to said second portion wherein said operator means flexes.
Claim 18
Dependent Claim
216 words
A safety valve apparatus adapted for movement through the bore of a well tubing to a desired subsurface location in a well for controlling flow of well fluids through the bore of the well tubing at the subsurface location in response to control signals communicated to the safety valve from a remote location, including: frame means for movement through the bore of the well tubing to and from the desired subsurface location; means with said frame means for releasably securing said frame means with the well tubing at the desired subsurface location; bore closure means mounted with said frame means for movement relative to said frame means to and from an open position enabling flow of well fluids through the bore of the well tubing and a closed position for blocking flow of well fluids through the bore of the well tubing; operator means movable relative to said frame means for effecting movement of said bore closure means to and from the open and closed positions responsive to control signals transmitted to said operator means from the remote location; and said operator means having first and second portions and means for connecting said first and second portions for enabling limited angular movement of said first portion relative to said second portion wherein said operator means flexes.
Claim 19
Dependent Claim
48 words
The apparatus as set forth in claim 15, wherein: one of said first and second portions includes means actuatable upon initial closing of said bore closure means for modifying the operator means to assure positive bore closure operation by adjusting for dimensional changes of the safety valve apparatus.
Claim 20
Dependent Claim
70 words
The apparatus as set forth in claim 15, wherein: said first portion and said second portion comprise tubular portions forming a substantially concentric bore through said operator means for providing a flow passage for well fluids; and said means for connecting comprising a spherical head formed on one of said tubular portions with said spherical head received and secured in a socket formed by the other of said tubular portions.
Claim 21
Dependent Claim
36 words
The apparatus as set forth in claim 17, wherein: said first tubular portion carries means for releasably securing said operator means with a movable control member for moving said first tubular portion with the control member.
Claim 22
Dependent Claim
107 words
The apparatus as set forth in claim 15, wherein: said bore closure means includes a rotatable ball-type closure element having a ball opening formed therethrough and a spherical sealing surface sealingly engaging an annular seat ring means having a central opening; and said operator means includes means for rotating said ball-type closure element to and from the open position placing said ball opening in communication with said central opening of said seat ring means for enabling flow of well fluids and the closed position for placing said ball opening out of communication with said central opening of said seat ring means for blocking flow of well fluids.
Claim 23
Dependent Claim
39 words
The apparatus as set forth in claim 19, wherein: said rotatable ball-type closure element sealing surface having a spherical diameter substantially equal to the outer diameter of said tubular portion of said operator means rotating said bore closure means.
Claim 24
Dependent Claim
87 words
The apparatus as set forth in claim 19, wherein: said first tubular portion carries said means for releasably securing said operator means with a movable control member for moving said first tubular portion with the control member; and said second tubular portion forming means surrounding said ball-type closure element for operably connecting with said ball-type closure element to rotate said ball-type closure element to and from the open and closed positions upon movement of said first tubular portion and said second tubular portion by the control member.
Claim 25
Dependent Claim
32 words
The apparatus as set forth in claim 21, wherein: said rotatable ball-type closure element sealing surface having a spherical diameter substantially equal to the outer diameter of said second tubular portion means.
Claim 26
Dependent Claim
226 words
A safety valve apparatus adapted for movement through the bore of a well tubing to a desired subsurface location in a well for controlling flow of well fluids through the bore of the well tubing at the subsurface location in response to control signals communicated to the safety valve from a remote location, including: frame means for movement through the bore of the well tubing to and from the desired subsurface location; means with said frame means for releasably securing said frame means with the well tubing at the desired subsurface location; bore closure means mounted with said frame means for movement relative to said frame means to and from an open position enabling flow of well fluids through the bore of the well tubing and a closed position for blocking flow of well fluids through the bore of the well tubing; operator means movable relative to said frame means for effecting movement of said bore closure means to and from the open and closed positions responsive to control signals transmitted to said operator means from the remote location; and said operator means having first and second portions and universal joint means for connecting said first and second portions for enabling limited angular movement therebetween while blocking longitudinal movement therebetween wherein said frame means flexes while maintaining said first and second portions in fixed longitudinal relationship.
Claim 27
Dependent Claim
226 words
A safety valve apparatus adapted for movement through the bore of a well tubing to a desired subsurface location in a well for controlling flow of well fluids through the bore of the well tubing at the subsurface location in response to control signals communicated to the safety valve from a remote location, including: frame means for movement through the bore of the well tubing to and from the desired subsurface location; means with said frame means for releasably securing said frame means with the well tubing at the desired subsurface location; bore closure means mounted with said frame means for movement relative to said frame means to and from an open position enabling flow of well fluids through the bore of the well tubing and a closed position for blocking flow of well fluids through the bore of the well tubing; operator means movable relative to said frame means for effecting movement of said bore closure means to and from the open and closed positions responsive to control signals transmitted to said operator means from the remote location; and said operator means having first and second portions and universal joint means for connecting said first and second portions for enabling limited angular movement therebetween while blocking longitudinal movement therebetween wherein said frame means flexes while maintaining said first and second portions in fixed longitudinal relationship.
Claim 28
Dependent Claim
48 words
The apparatus as set forth in claim 23, wherein: one of said first and second portions includes means actuatable upon initial closing of said bore closure means for modifying the operator means to assure positive bore closure operation by adjusting for dimensional changes of the safety valve apparatus.
Claim 29
Dependent Claim
70 words
The apparatus as set forth in claim 23, wherein: said first portion and said second portion comprise tubular portions forming a substantially concentric bore through said operator means for providing a flow passage for well fluids; and said means for connecting comprising a spherical head formed on one of said tubular portions with said spherical head received and secured in a socket formed by the other of said tubular portions.
Claim 30
Dependent Claim
36 words
The apparatus as set forth in claim 25, wherein: said first tubular portion carries means for releasably securing said operator means with a movable control member for moving said first tubular portion with the control member.
Claim 31
Dependent Claim
106 words
The apparatus as set forth in claim 25, wherein: said bore closure means includes a rotatable ball-type closure element having ball opening formed therethrough and a spherical sealing surface sealingly engaging an annular seat ring means having a control opening; and said operator means includes means for rotating said ball-type closure element to and from the open position placing said ball opening in communication with said central opening of said seat ring means for enabling flow of well fluids and the closed position for placing said ball opening out of communication with said central opening of said seat ring means for blocking flow of well fluids.
Claim 32
Dependent Claim
39 words
The apparatus as set forth in claim 27, wherein: said rotatable ball-type closure element sealing surface having a spherical diameter substantially equal to the outer diameter of said tubular portion of said operator means rotating said bore closure means.
Claim 33
Dependent Claim
87 words
The apparatus as set forth in claim 27, wherein: said first tubular portion carries said means for releasably securing said operator means with a movable central member for moving said first tubular portion with the central member; and said second tubular portion forming means surrounding said ball-type closure element for operably connecting with said ball-type closure element to rotate said ball-type closure element to and from the open and closed positions upon movement of said first tubular portion and said second tubular portion by the control member.
Claim 34
Dependent Claim
32 words
The apparatus as set forth in claim 29, wherein: said rotatable ball-type closure element sealing surface having a spherical diameter substantially equal to the outer diameter of said second tubular portion means.
Claim 35
Dependent Claim
276 words
A safety valve apparatus adapted for movement through the bore of a well tubing to a desired subsurface location in a well for controlling flow of well fluids through the bore of the well tubing at the subsurface location in response to control signals communicated to the safety valve from a remote location, including: frame means for movement through the bore of the well tubing to and from the desired subsurface location, said frame means having a first frame portion and a second frame portion and means for connecting said first and second portions for enabling limited angular movement of said first frame portion relative to said frame portion wherein said frame means flexes; means with said frame means for releasably securing said frame means with the well tubing at the desired subsurface location; bore closure means mounted with said frame means for movement relative to said frame means to and from an open position enabling flow of well fluids through the bore of the well tubing and a closed position for blocking flow of well fluids through the bore of the well tubing; and operator means operably connected with said bore closure means for effecting movement of said bore closure means to and from the open and closed positions responsive to control signals transmitted to said operator means from the remote location, said operating means having a first operating portion and a second operating portion and means for connecting said first and second portions for enabling limited angular movement of said operating portion relative to said second operating portion wherein said safety valve apparatus may flex in moving to and from the desired subsurface location.
Claim 36
Dependent Claim
276 words
A safety valve apparatus adapted for movement through the bore of a well tubing to a desired subsurface location in a well for controlling flow of well fluids through the bore of the well tubing at the subsurface location in response to control signals communicated to the safety valve from a remote location, including: frame means for movement through the bore of the well tubing to and from the desired subsurface location, said frame means having a first frame portion and a second frame portion and means for connecting said first and second portions for enabling limited angular movement of said first frame portion relative to said frame portion wherein said frame means flexes; means with said frame means for releasably securing said frame means with the well tubing at the desired subsurface location; bore closure means mounted with said frame means for movement relative to said frame means to and from an open position enabling flow of well fluids through the bore of the well tubing and a closed position for blocking flow of well fluids through the bore of the well tubing; and operator means operably connected with said bore closure means for effecting movement of said bore closure means to and from the open and closed positions responsive to control signals transmitted to said operator means from the remote location, said operating means having a first operating portion and a second operating portion and means for connecting said first and second portions for enabling limited angular movement of said operating portion relative to said second operating portion wherein said safety valve apparatus may flex in moving to and from the desired subsurface location.
Claim 37
Dependent Claim
72 words
The apparatus as set forth in claim 31, wherein: said first frame portion and said second frame portion comprise tubular portions forming a substantially concentric bore through said frame means for providing a flow passage for well fluids; and said means for connecting comprising a spherical head formed on one of said tubular portions with said spherical head received and secured in a socket formed by the other of said tubular portions.
Claim 38
Dependent Claim
27 words
The apparatus as set forth in claim 32, wherein: said first tubular frame portion carries said means for releasably securing said frame means with the well tubing.
Claim 39
Dependent Claim
92 words
The apparatus as set forth in claim 32, wherein: said bore closure means includes a rotatable ball-type closure element having a ball opening formed therethrough and a spherical sealing surface; and said operator means includes means for rotating said ball-type closure element to and from the open position placing said ball opening in communication with said bore of said frame means for enabling flow of well fluids and the closed position for placing said ball opening out of communication with said bore of said frame means for blocking flow of well fluids.
Claim 40
Dependent Claim
39 words
The apparatus as set forth in claim 34, wherein: said rotatable ball-type closure element sealing surface having a spherical diameter substantially equal to the outer diameter of said tubular portion of said frame means mounting said bore closure means.
Claim 41
Dependent Claim
67 words
The apparatus as set forth in claim 35, wherein: said first tubular frame portion carries said means for releasably securing said frame means with the well tubing; and said second tubular frame portion forming a cage means surrounding said ball-type closure element for operably connecting with said ball-type closure element to maintain said spherical surface of said ball-type closure element in sealing engagement with said frame means.
Claim 42
Dependent Claim
30 words
The apparatus as set forth in claim 36, wherein: said rotatable ball-type closure element sealing surface having a spherical diameter substantially equal to the outer diameter of said cage means.
Claim 43
Dependent Claim
74 words
The apparatus as set forth in claim 31, wherein: said first operator portion and said second operator portion comprise tubular portions forming a substantially concentric bore through said operator means for providing a flow passage for well fluids; and said means for connecting comprising a spherical head formed on one of said tubular operator portions with said spherical head received and secured in a socket formed by the other of said tubular operator portions.
Claim 44
Dependent Claim
37 words
The apparatus as set forth in claim 38, wherein: said first tubular operator portions carries means for releasably securing said operator means with a movable control member for moving said first tubular portion with the control member.
Claim 45
Dependent Claim
107 words
The apparatus as set forth in claim 38, wherein: said bore closure means includes a rotatable ball-type closure element having a ball opening formed therethrough and a spherical sealing surface sealing engaging an annular seat ring means having a central opening; and said operator means includes means for rotating said ball-type closure element to and from the open position placing said ball opening in communication with said central opening of said seat ring means for enabling flow of well fluids and the closed position for placing said ball opening out of communication with said central opening of said seat ring means for blocking flow of well fluids.
Claim 46
Dependent Claim
39 words
The apparatus as set forth in claim 40, wherein: said rotatable ball-type closure element sealing surface having a spherical diameter substantially equal to the outer diameter of said tubular portion of said operator means rotating said bore closure means.
Claim 47
Dependent Claim
87 words
The apparatus as set forth in claim 40, wherein: said first tubular portion carries said means for releasably securing said operator means with a movable control member for moving said first tubular portion with the control member; and said second tubular portion forming means surrounding said ball-type closure element for operably connecting with said ball-type closure element to rotate said ball-type closure element to and from the open and closed position upon movement of said first tubular portion and said second tubular portion by the control member.
Claim 48
Dependent Claim
32 words
The apparatus as set forth in claim 42, wherein: said rotatable ball-type closure element sealing surface having a spherical diameter substantially equal to the outer diameter of said second tubular portion means.
Claim 49
Dependent Claim
74 words
The apparatus as set forth in claim 40, wherein: said first frame portion and said second frame portion comprise tubular portions forming a substantially concentric bore through said frame means for providing a flow passage for well fluids; and said means for connecting comprising a spherical head formed on one of said tubular frame portions with said spherical head received and secured in a socket formed by the other of said tubular frame portions.
Claim 50
Dependent Claim
27 words
The apparatus as set forth in claim 44, wherein: said first tubular frame portion carries said means for releasably securing said frame means with the well tubing.
Claim 51
Dependent Claim
40 words
The apparatus as set forth in claim 44, wherein: said rotatable ball-type closure element sealing surface having a spherical diameter substantially equal to the outer diameter of said tubular portion of said tubular frame portion mounting said bore closure means.
Claim 52
Dependent Claim
68 words
The apparatus as set forth in claim 44, wherein: said first tubular frame portion carries said means for releasably securing said frame means with the well tubing; and said second tubular frame portion forming a cage means surrounding said ball-type closure element for operably connecting with said ball-type closure element to maintain said spherical surface of said ball-type closure element in sealing engagement with said seat ring means.
Claim 53
Dependent Claim
30 words
The apparatus as set forth in claim 47, wherein: said rotatable ball-type closure element sealing surface having a spherical diameter substantially equal to the outer diameter of said cage means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-09 | 1981-07-11 | 1982-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-09 | 1985-07-11 | 1986-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-09 | 1989-07-11 | 1990-01-10 | $7700.00 | Window Closed / Lapsed |