High Quality Stage Collar 3-1/2, Open Bomb 3-1/2, Stage Collar Opening Bomb Suppliers in China

Home > Products > manifold gauge set > 3-1/2 " stage collar opening bomb, closing plug

3-1/2 " stage collar opening bomb, closing plug

  • 3-1/2 " stage collar opening bomb, closing plug
  • 3-1/2 " stage collar opening bomb, closing plug
  • 3-1/2 " stage collar opening bomb, closing plug
  • 3-1/2 " stage collar opening bomb, closing plug

3-1/2 " stage collar opening bomb, closing plug

    Unit Price: 3650.79 USD
    Min. Order: 50 Piece/Pieces
    Packaging: wooden box
    Productivity: 60pcs one day
    Brand: eastlong
    Transportation: Ocean,Land,Air,Express
    Place of Origin: china puyang
    Supply Ability: 60 pcs one day
    Certificate: API AND ISO
    HS Code: 8431431000
    Port: tianjin port ,shanghai port ,qingdao port

Product Description


3-1/2”Drilling stage cementing tool is a special equipment which divided the cementing job for twice. Its mainly used for the following condition.

1. A large amount of cement

2. The stratum cannot bear too much fluid column pressure

3. Seal off special horizon

4. Prevent air channeling after cementing

5. The temperature difference is too big between interval isolation ,cement slurry performance is not easy to adjust.


3-1/2 ˝Ф88.9stage cementing tool is mainly composed by two stage collar(body)

Flexible plugflexible plug seat(bump pressure seat)gravity type open plug and closing plug.

三、Performance feature

1.The open plug seat and closing plug sleeve with left-hand to connect the threads, in case of rotating when drilling the open plug seat

2.Special organization prevent closing seat closed ahead of time.

3.closing seat have a special organization, after the closing seat close the circulation hole, the special organization prevent closing seat retrogress, to achieve permanent close.

4.Carrying out the opening and closing, there is no small cavity liquid compression.

四、Technical parameters

1(sheet 1)



Open pressure ,Mpa


Close pressureMPa


Seal abilityMPa


Connect Thread Size


Ontology maximum overall diametermm


Ontology boremm


Flexible plug lengthmm


Close plug lengthmm


Total lengthmm


五、Operating principle

1.Discontinuous graded cementing operating type

After the first level cementing, release the flexible plug, replace the mud, when the Flexible plug touch the pressure release the wellhead pressure, and put gravity type open plug in. open pump to give pressure after the gravity open type plug sit by the free fall into the seat, open the shear cut and the plug seat and going down with closing sleeve and closing plug seat to open the loop hole, build cycle and loop out the needless mud adhering the 2stage cementing collar

After the two-stage cementing, release the closing plug to replace the mud. Keeping pressure after the closing plug down to the seat, the closed shear pin cut and go down with closing sleeve, the open plug seat, closing plug seat to close loop hole. Keeping pressure to 12 mpa, close the plug will cut short shear and go down with gravity plug, the special organization prevent closing seat retrogress, to achieve permanent close.

六、 Delivery state

The 3-1/2 "stage collar is packed in double boxes. One packing case contains stage collar body, the Other packing case contains stage collar accessory flexible plug, gravity type open plug and closing plug, etc.

Note: (1) The user has no special requirements, the accessories well equipped out of factory according to the operating type of Non-continuous stage cementing.

七、Warehousing, transportation and maintenance

1. The products should be stored in a flat, dry warehouse, the parts should be properly kept, prevent the rain, sun and sea water erosion;

2. Before using the product please not open the box as much as possible, do not tear the plastic bags;

3Handle with care when transporting prohibited throw, hit, bruised body to prevent the two-stage hoop deformation;

4.Product storage time should not exceed 1 year.

八、Recommended operating procedures and matters needing attention


1. Check the two-stage cementing device and its accessories carefully , especially the body up and down the seals threaded and accessories

2.The casing pipe must according to standard size.

According to the order well casing string cementing design structure: float shoe +float collar+ Landing Collarincluding flexible plug seat) + casing +Centralizer +Stage Collar +Centralizer +Casing+ cement head.

Note: Flexible plug seat placed inside the collar, no length

Two stage cementing device ontology sleeve length should be not less than 80 m below

Two stage cementing device location should choose the rules of formation stability, caliper, not easy to collapse

(二)Down casing pipe and stage tool

1.According to the order into the casing and accessories, according to the standard on enough torque. Accessories and grading ring and the casing pipe connection should wear thread binder.

2.Appropriate control casing lowering speed, every 10 root tube filling full set under the mud.

3.The grading ring fluctuation should be continuous and elastic 3 ~ 5 joints of casing centralizer.

4.When hanging on the rig note that prevent bump stage collar

Note: Do not use a crowbar penetration inside the two-stage cementing be moving or lifting

5.When stage collar devolved into the well please slowly to prevent the wellhead and other devices for two-stage cementing body squeeze and collision.

6.After casing down to connect cement head and cementing pipelines, flow rate circulation from small to large to prevent leakage strata hold.

(三)The cementing operation

A.When using non-continuous construction stage cementing ways:

1.The flexible plug installed in the cement head.

2.After the end of the cycle according to the design requirements for the first stage of cementing cementing operations.

3.Pressure flexible plug, touch pressure to replace the mud.

(Note: To prevent malfunctions of the float collar, float shoe resulting in mud reflux, replace with the high density mud below the Stage collar)

4.Stop the pump, the pressure is released from the wellhead, the gravity-type open cast plugs (usually falling speed 60m/min), will close the plug installed in the cement head.

5.When the plug is expected to sit on the gravity grading plug hoop open seat, pump pressure - open graded hoop establishment of recycling.

Note: The opening pressure may have errors. If failed, generally due to the gravity open plug is not sit on the seat, release the pressure, wait. If the gravity open plug has been sit on the seat, still can not open, gradually increase the pressure until opened.

6.Circulating wellbore.

7.For the second stage cementing operations as the cementing design requirements

8.Pressure closing plug(Press the close plug with a 0.5-1m3 mud to making up the leak proofness of two-stage collar) to replacing mud, touch pressure. Gauge pressure shall be the final cycle pressure + additional pressure. Additional pressure should be stage collar closed pressure +2.0 MPa.

Note: Under conditions allow additional, increase the closed additional pressure to facilitate stage collar off.

9.Stop the pump, release the pressure from the wellhead, check the closing sleeve has been closed or not. If back-flow continued, keeping closing. The second additional pressure should be greater than the first 3 ~ 5Mpa. If still fail, then close the well and wait for coagulation.

10.Unloading manifold , cementing finished.

Henan Dongfanglong Machine Manufacture Co., Ltd

  • 1
  • 2
  • 3
  • 4
  • 5

Henan Dongfanglong Machine Manufacture Co., Ltd. was founded in 1999, mainly engaged in oil pipes and pipe fittings, oil special drilling and production tools and oil automation equipments. The company is named as national integration and standard implementation enterprise, a national science and technology-based small and medium-sized enterprise. With honors of"Henan enterprise technology center", "Henan postdoctoral innovation practice base", the company hold 35 senior engineers, engineers and technicians, and has successively obtained ISO9001 Quality system certificates, API 5CT certificate authorized by American Petroleum Institute and BV Quality supplier evaluation certificate issued by company of France. Owing more than 30 independent intellectual property rights, forming an industrial chain integrating design, development, manufacturing, testing and experiment of numerical control automation equipment for petroleum machinery products, which can meet customers' demand for products Full cycle service.

The company has established the [Dong Fang Yunlong E-commerce Trading Platform" with oil drilling and production equipment and tools as the radiation point, improved the ability of Internet cross-border e-commerce, and completed the transformation of enterprise from internal operation to building industry alliance. It has built an intelligent workshop, expanded the support of intelligent manufacturing for enterprise operation, created a new intelligent manufacturing mode with high efficiency and flexibility, and improved the core competitiveness of the enterprise. And successfully registered production and sales companies in the Netherlands, opening a new starting point for overseas investment and development.

In the future, Dongfanglong will closely focus on national policy orientation and innovation driven development strategy, formulate sustainable development transformation strategy, keep forging ahead, take creating world famous brand and winning honor for the nation as the goal, work together with people of insight from all walks of life for win-win cooperation, and build up the dream of oil equipment manufacturing.

Api 5ct 08379b5eb7920a089a1761cdc6d7436844e97d70f99a7eebbd21c9f9a32ea2b160c0fe9b3f47f7efcdf4d6a4b8f018f94

Company Info

  • Company Name: Henan Dongfanglong Machine Manufacture Co., Ltd
  • Representative: Bie Xinyun
  • Product/Service: Tubing&Casing Coupling , API 5CT PUP Joint , X-over Crossover , Down Hole Tools , Packer , Sucker Rod Couplings
  • Capital (Million US $): 53,860,000RMB
  • Year Established: 1999
  • Total Annual Sales Volume (Million US $): US$10 Million - US$50 Million
  • Export Percentage: 41% - 50%
  • Total Annual Purchase Volume (Million US $): US$10 Million - US$50 Million
  • No. of Production Lines: 10
  • No. of R&D Staff: 11 -20 People
  • No. of QC Staff: 11 -20 People
  • OEM Services Provided: yes
  • Factory Size (Sq.meters): 30,000-50,000 square meters
  • Factory Location: At the Intersection of 106 National Highway and Jintian Road,Puyang,Henan
  • Contact Person: Mr. HE QINGLEI
  • Tel: 0393-5399123
Email to this supplier
  • *Subject:
  • To:

  • *Messages:
    Your message must be between 20-8000 characters