Large gate, usually fitted with a ram type blowout preventer operation to form a sealed annular space between the tubing string and the wellbore in the well, baa case of a column-plugging can also be done individually, but used several times to die, and does not allow the use of long-term shut-in.
Lower housing, upper housing, piston, adapter ring, and packing element. All components are designed and built for ease of maintenance and ultimate reliability.
Close – When the hydraulic oil is pumped into the extended port, the element inside will be lifted and squeezed into the pipe/tubular.
Open – On the other hand, if the hydraulic fluid is pumped into the retract port, the element will be pushed down resulting in releasing the tubular.
Shaffer bop specs
| Item | Specification for Annular BOP | |||||||||
| Size and model |
7 1/16″ -3000psi |
7 1/16″ -5000psi |
9″ -3000psi |
9″ -5000psi |
11″ -3000psi |
11″ -5000psi |
13 5/8″ -3000psi |
13 5/8″ -5000psi |
20 3/4″ -3000psi |
21 1/4″ -5000psi |
| mm/in Bore (mm/in.) |
179.4 7 1/16 |
179.4 7 1/16 |
228.6 9 |
228.6 9 |
279.4 11 |
279.4 11 |
346.1 13 5/8 |
346.1 13 5/8 |
527 20 3/4 |
539.8 21 1/4 |
| Rated working pressure (MPa/psi) |
21 3,000 |
35 5,000 |
21 3,000 |
35 5,000 |
21 3,000 |
35 5,000 |
21 3,000 |
35 5,000 |
21 3,000 |
35 5,000 |
| Hydrostatic pressure testing pressure (MPa/psi) |
42 6,000 |
70 10,000 |
42 6,000 |
70 10,000 |
42 6,000 |
70 10,000 |
42 6,000 |
70 10,000 |
31.5 4,500 |
70 10,000 |
| Hydraulic-controlled rated working pressure (MPa/psi) | 21/3,000 | |||||||||
| Recommended hydraulic working pressure seal pipe (MPa/psi) | 1,218～1,522psi | |||||||||
| Max. working pressure seal well without a pipe in (MPa/psi) |
10.5 1,500 |
17.5 2,500 |
10.5 1,500 |
17.5 2,500 |
10.5 1,500 |
17.5 2,500 |
10.5 1,500 |
17.5 2,500 |
10.5 1,500 |
17.5 2,500 |
| Recommended hydraulic working pressure seal well without a pipe in (MPa/psi) | ≤10 .5/1,500 | |||||||||
| Open Max. oil volume (L) | 15 | 15 | 22.8 | 33 | 39 | 56 | 69 | 69 | 110 | 181 |
| Close Max. oil volume (L) | 21 | 21 | 34 | 42 | 50 | 72 | 94 | 94 | 173 | 241 |
| Lift weight by two lifting rings (t) | 16 | 16 | 16 | 25 | 25 | 25 | 32 | 32 | 32 | 64 |
| The outlet of hydraulic oil | NPT 1” | |||||||||
| Temperature grade of metal | T-20/250(-29℃～121℃) | |||||||||
| Temperature grade of non-metal | BAB (-18℃~66℃~93℃) | |||||||||
| Medium material contact with well liquid | Per to NACE MR-01-75, meet API 16A 4th Edition Standard | |||||||||
