Inside BOP-Kelly check valve is a constant-open type blowout protection assembly in drilling tool, as well kick happens, it can be closed and prevent fluid under ground from gushing up through the water hole in drilling column. In well control operation, if hose and high-pressure manifold is damaged, it can be replaced in safety under the valve being closes.
Upper check adopts left hand thread but the lower adopts right hand thread, and they are identical in structure of ball valve.
Appliances
The rated working pressure of Kelly check valve should be equal to the rated pressure of BOP, the ID of check should be larger than (or equal to) the ID of Kelly rod, Max working pressure and test pressure should be tested according the requirement listed in the below table, Holding pressure for 3 minutes without leakage is considered as a qualified sealing test, appliance for check is up to 82 Deg. C. And the check wrench should stay the available/usable position.
Feature
Upper check valve consists of valve body, upper/lower seat, ball body, rotary-block, retainer, spring and non-metal seals etc.
Valve body is ASTM4140 forging, and the machinery properties after heat treatment can meet the requirementof API Spec 7.
Valve seat and ball body are made of heat-resistant stainless steel with abrasion and corrosion resistance.
The valve is single direction seal, as the valve is closed, under the co-reaction of fluid pressure under well and pre-load spring pressure, the ball body approaches to the back-seat quickly so as to create a seal. As for the sealing face of back-seat adds a PTFE nonmetal ring and reduce the compact of ball body to valve seat, So that it should have more reliable performance.
The surface of the valve body stamped with visiblesign of " open" or " close' indicates the open/close station of check valve obviously
| Parts List: |
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| Item | Component | Qty | Material |
| 1 | Handle | 1 | 1045 |
| 2 | Rotary-Block | 1 | 4130 |
| 3 | O-Ring | 1 | NBR |
| 4 | Body | 1 | 4130 |
| 5 | Spring | 8 | 1566 |
| 6 | Lower Seat | 1 | 410 |
| 7 | Ball | 1 | 410 |
| 8 | Lower Retainer | 1 | 410 |
| 9 | O-Ring | 1 | NBR |
| 10 | Upper Seat | 1 | 410 |
| 11 | Upper Retainer | 1 | 4130 |
| 12 | Retainer | 1 | 410 |
| 13 | Circlip | 1 | 1566 |
CHANCE DOOR INTERNATIONAL specializes in the supply of equipment and service solutions to the international oil and gas industry. We guarantee quality goods, competitive price, and timely delivery.
Our range of equipment and service solutions include;
Rig Equipment and tools, Service and spares
Wellhead: Annular & RAM type BOP, Chrimstmas Tree, Manifold, Valves & parts under API Standard
Oilfield associated services
Chemicals
Laboratory supplies
Safety products
CHANCE DOOR International has the personnel and experience to ensure that our Rig and equipment packages are manufactured to international standards, and can start up and operate with maximum uptime in the field. With a long history of operating and maintaining onshore and offshore rigs our personnel are well equipped to assist our customers optimize their rig packages to save operational time during drilling and moving activities.
Manufacturing
Through experience, CHANCE DOOR International has established a list of approved vendors that have all the relevant API & ISO certification required as well as proven commitment to quality. During manufacturing of equipment packages CHANCE DOOR International are on site, contributing to the quality of the end product, and its ability to perform in the field. In addition CHANCE DOOR International has developed its own acceptance testing standards that exceed conventional Factory Acceptance Testing.
All of our efforts during manufacturing are aimed at provided the Customer with the peace of mind that when the equipment arrives on location, it is ready to go to work, and it will perform reliably.
CHANCE DOOR International provides comprehensive after sales service, including equipment installation and rig up support, operational training, warranty interface, and supply of technical service and spare parts.
