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FQXZ-159, Tool Roundness Vent Pressure Check Valve, Drilling Security tools

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Mr. George Zhao Tel:86--13901031016

Address: Room 1210, YiShang building, Xicheng Qu, Ma Liandao Rd. #11, Beijing, P.R.China, 100055

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FQXZ-159, Tool Roundness Vent Pressure Check Valve, Drilling Security tools

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FQXZ-159, Tool Roundness Vent Pressure Check Valve, Drilling Security tools
Product Details:
Place of Origin: China
Brand Name: HaoAn
Certification: MA、A、Lac-MRA、CNAS
Model Number: FQXZ-159
Payment & Shipping Terms:
Minimum Order Quantity: 1
Price: Order
Packaging Details: Wood, Export Packaging
Delivery Time: EXW, FOB, CIF, 45-60 days
Payment Terms: T/T, The 50% First payment, 40% before shipment, 10% within 30 days after shipment.
Supply Ability: 50 per month
Description

QXZ Tool Roundness Vent Pressure Check Valve. Oil and Gas Well Drilling Security tools. 

(China National Invention:200710020822.6;China National Patent:200720036338.8)

Flooding uncontrol in high pressure oil gas well causes serious blowout, and its consequence is disaster. It causes the great wastage of oil and gas, serious pollution of environmental, and also threaten personnel’s health who works in field, even causes the great wastage of life and proporty.

   Flooding uncontrol in high pressure oil gas well always occurs during drilling operation. In order to prevent blowout which causes by flooding uncontrol, Petroluem and gas drilling well-control specification which authorized by CNPC specifies: one blowout control single pipe(with fitting joint and check valve which meets drill pipe or drill collar’s connection thread). Recently, sagittate check valve is adopted on drilling, When the pressure becomes greater under the earth,and the serious flow or blow occur, the failure  of releasing the pressure by sagittate check valve will result in the difficult of screwing, even lost. it could not do kill well operation.

QXZ tool roundness vent pressure check valve is a newly blowout prevention tool of drilling tools which would be employed during oil drilling well-control operation. It has three functions of pressure relief (ball valve is open as thread connecting with drill pipe or drill collar in wellhead), blowout (after connecting with wellhead drill tools, close ball valve, it could countinue tripping to kill well depth) and cycle kill well(adopt weighting drilling fluid circulation to rebuild well bore pressure balance ).

   The valve is float ball valve which equivalent to down plug cock of kelly, but the difference is ball vlalve is float and could be rotate. When blowout occurs,close wellhead BOP, open restriction valve, force to connect the valve(ball valve always open) on drill pipe or drill collar. Because of releasing pressure, reduce wellhead drag force as connecting thread. It’s easy to face-to-face button and fasten. After thread connection successful, close ball valve(isolate oil and gas in drilling). It could continue tripping to the depth which needs kill well to operation. Ball valve activates circulation path under fuild flow pressure when killing well. It closes automatic when pump stops.

   The valve gots over disadvatages of which other kinds check valve could not releas pressure at wellhead(outflow of oil and gas causes resistance, so thread connection fail, and be out of control outflow ), it also eliminates defect which kelly could not circulation kill well after rotate into well.

   It is easy for two people uplift to fasten at wellhead that two symmetric control levers should be installed on the valve for wellhead operation.In order to prevent corrosion,rust, all the inter-parts of tools should adopt anti-corrosion material.

      The valve which both side connections are designed torelevant connection screw thread could be utility, because of different drill pipe sizes and its connected drill collar sizes.

  

The specification and technology parameter of

QXZ Tool Roundness Vent Pressure Check Valve(reference)

Mode

Outside diameter (mm)

Drift diameter (mm)

Rated working pressure

(Mpa)

Length

(mm)

Quality (kg)

Inner screw button

(up)

Outside screw button(down)

FQXZ-121

121

48

35/70

640

60

NC-38

NC-38

FQXZ-159

159

55

35/70

460

54

NC-46

NC-46

FQXZ-168

168

62

70/105

665

75

NC-50

NC-50

FQXZ-178

178

68

70/105

500

55

5½"FH

5½"FH

Note: outside screw button could be collected by customers when ordering.

Other about
Contact Us
Mr. George Zhao
  • Room 1210, YiShang building, Xicheng Qu, Ma Liandao Rd. #11, Beijing, P.R.China, 100055
  • Tel:86--13901031016
  • Fax:86-10-51938005
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