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1. WO2020109840 - SYSTÈME DE BOBINE D'ESSAI D'OBTURATEUR ANTI-ÉRUPTION

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

Claims l to 13

1. Blow-out preventer BOP test spool system (1), comprising:

a test spool (10) to be mounted between a wellhead (30) and a blow-out preventer (40);

the test spool (10) having an inner cylindrical hole (12) extending in vertical direction (Z) of the test spool (1);

the inner cylindrical hole (12) in vertical direction (Z) comprising an upper section (13) and a lower section (14), wherein the lower section (14) comprises a smaller inner diameter (D14) than the inner diameter (D13) of the upper section (13); and

a test plug (20), insertable into the inner cylindrical hole (12) of the test spool (10), the test plug (20) having a cylindrical outer shape with an outer diameter (D23) that is smaller than the inner diameter (D13) of the upper section (13) and is larger than the inner diameter (D14) of the lower section (14), such that the plug (20) can abut a loading shoulder (15) between the upper (13) and lower section (14) and the plug (20) is not able to move further down within the test spool (1).

2. Blow-out preventer test spool system according to claim 1, wherein the loading shoulder (15) comprises a ring-shaped surface tapered in vertical downward direction (Z).

3. Blow-out preventer test spool system according to claim 1 or 2, wherein the test spool (10) comprises lock down screws (17) that are radially arranged in the upper section (13) of the test spool (10) and are able to engage into the inner cylindrical hole (12) from the outside and to abut the test plug (20) in order to prevent vertical movement of the test plug (20).

4. Blow-out preventer test spool system according to one of claims 1 - 3, further comprising radially arranged side outlets (19) in the lower section (14) of the test spool (10).

5. Blow-out preventer test spool system according to one of claims 1 - 4, wherein the test plug (20) comprises an upper part (23) and a lower part (24), wherein the lower part (24) has a smaller outer diameter (D24) than the upper part (23) and extends downwards into the lower section (14) of the blow-out preventer test spool (1).

6. Blow-out preventer test spool system according to one of claims 1 - 5, wherein the blow-out preventer test spool system (1) is designed such that, with the test plug (20) inserted in the test spool (10), a communication between side outlets (19) and wellbore below the test plug (20) is available, wherein the side outlets (19) are selectively closed by control barriers (50).

7. Blow-out preventer test spool system according to one of claims 1 - 6, wherein the test plug (20) comprises a central threaded hole (22) extending throughout the center line of the test plug (20).

8. Blow-out preventer test spool system according to claim 7, wherein the central threaded hole (22) of the test plug (20) can be closed by a blind plug (28).

9. Blow-out preventer test spool system according to claim 7 or 8, wherein the test plug (20) comprises inner threads (27) in the central threaded hole (22) at its upper end and outer or inner threads (29) at its lower end.

10. Blow-out preventer test spool system according to one of claims 7 - 9, wherein the test plug (20) comprises radial sideway channels (25) going downwards inclined from the outer circumference at the upper end towards the central threaded hole (22).

11. Blow-out preventer test spool system according to one of claims 1 - 10, further comprising a wear bushing (50) insertable into the upper and (13) of the test spool (10), wherein the wear bushing (50) can fit in place instead of the test plug (20), for protecting the test spool’s (10) sealing area during a drilling operation.

12. Method of testing a blow-out preventer (40), the method comprising the steps:

providing a blow-out preventer test spool system (1) in-between a wellhead (30) and a blow-out preventer (40), wherein the blow-out preventer test spool system

(1) comprises a test spool (10) and a test plug (20);

inserting the test plug (20) into the blow-out preventer test spool (10) and arranging the test plug (20) on a loading shoulder (15) inside the test spool (10); and

testing the blow-out preventer (40) by applying pressure to the blow-out preventer (40) above the test spool (10).

13. Method according to claim 12, further comprising the step of locking the test plug (20) in the test spool (10) by engaging and abutting lock down screws (17) to the test plug (20) in order to secure the test plug (20) in place.