ZZ TOP designs and manufactures spacer spool having API-6A end connection. Spacer spools are suitable for wellhead extension, BOP installation, choke & kill manifold spools and production manifold.

Common end connections are flanged, hub and studded. Some customers use names like "riser spool" or "surface riser spools". Customer should specify the length according to stack height. Each spool is Pressure, drift and dimensionally tested before shipment. Drift testing is done to ensure that access to the well-bore is not restricted.

Body and flanges are manufactured from low alloy steel like AISI 4130,Application of CRA (AISI 316L or Nickel alloy 625) enhance the corrosion resistance ability of ring groove, thus in turn, enhance the product life. Lifting pad-eye is well capable of handling the weight of the spool. Spools are either single piece forged or welded construction, which depends on criticality and customer requirement.

When "minimum height or length" is specified, ZZ TOP Spacer Spools have corresponding appropriate height (or length) with adequate clearance to accommodate studs, nuts, wrenches, and clamps as applicable. Spacer spools can be designed with lifting lug in accordance with the case.

ZZ TOP is the professional manufacturer of the drill stem testing tools for cased hole & open hole, as well as wellhead equipment.

As the manufacturer, we produce below items:

-DST tools- Full bore retrievable (RTTS) packer, retrievable(RTTS) circulating valve, Retrievable (RTTS) Safety joint, Select tester valve, LPR - N valve, OMNI Valve, Rupture Disk safety circulating valve, RD circulating valve, RD Sampler, Round mandrel Slip Joint, Tubing String Testing Valve ( TST valve), Gauge Carrier, Hydraulic circulating valve, MFE, IPO valve,

-Surface well testing equipment -  Flowhead, SSV, ESD,Separator etc.

-Wellhead equipment such as BOP, X-mas tree, Choke manifold, kill manifold, drilling spool, casing head and other valve & flanges

-Downhole tools such as stabilizer, stabilizer forging, reamer, X-over sub and  etc

As the distributor, we are working with large rig companies and heavy equipment manufacturers for the below products:

-Rig parts from RG,BOMCO,SJ,Hong Hua,KR etc,such as mud pump,rotary table, hook & block, swivel, crown block and consumable parts

- BOP and wellhead parts from Rongsheng,Shenkai

- Pipe- Tubing, Casing, seamless pipe

- Handling tools and Fishing tools