7 1/16″ - 21 1/4″ Shaffer Annular Bop Oil Well Drilling
What is annular bop
Annular preventers are the most versatile well-control equipment and many names are referring to it as bag preventers or spherical preventers. The annular preventers can seal around several sizes of drill pipe/drill collar, work string, wireline, tubing, etc. There are some models which can utilize wellbore pressure to provide the additional sealing capability.
An annular blowout preventer helps keep the oil well-sealed to prevent disastrous blowouts. It operates differently from the ram blowout preventers.
Main components
Lower housing, upper housing, piston, adapter ring, and packing element. All components are designed and built for ease of maintenance and ultimate reliability.
How the annular preventers work
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.
Annular vs RAM Blowout Preventer
The annular blowout preventer performs several functions in drilling operations. It seals the annular space between the tubing, casing, and drill pipes. It also helps maintain the seal when the casing, tubing, or drill pipes are out of the drill hole. Unlike RAM blowout preventers, annular BOPs can seal various pipes of different sizes.
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 |
Product Tags:
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3000psi Shaffer Annular Bop Annular Preventer Bop For Oil Well Drilling Images
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