ISO BV SGS DST Tool HPHT Cased Hole RD Safety Circulation Valve 3 7/8"

Introudction of 3 7/8" RD safety circulating valve

The 3 7/8" rupture disk RD safety circulating valves are applied the drill stem testing operation in slim hole with both safety valve function and circulating valve function. If the ball section is removed, the RD safety circulating valve will become rupture disk circulating valve. The 3 7/8" rupture disk safety circulating valve i

Features of Ful-Flo DST Tools

* The 3 7/8" RD safety circulating valve is the full opening type, which allows perforating gun pass through
* The 3 7/8" RD safety circulating valve is used in slim hole.
* It is easy to install and mainten the 3 7/8" RD safety circulating valve


Specification of the Ful-flo DST tool string for 3 7/8" Cased hole

How to Operate the RD safety circulating valve

When used as the primary reversing valve, the RD Safety Circulating Valve is run above the tester valve in the tool string. When the RD Safety Circulating Valve is run in this position, formation fluids become
trapped between its ball valve and the ball valve in the tool string’s test valve. A drain valve should be
placed between these tools so that any trapped pressure can be safely vented at the surface. Place a drain valve below the RD Safety Circulating Valve when a closed valve is run below this tool.

And the operation pressure of the ruptrue disk in the RD safety circulating must be calculated for selecting the proper rupture disk before using the RD safety circulating valve. To work out the pressure, it will require information of mud weight, testing depth, bottom hole temperature, and maximum annulus pressure.

Advantage of the Techcore Oil Tools

Techcore Oil Tools expertise in manufacture of the Drill Stem Testing Tools for more than Ten years, the professional Reserch and Development (R&D) department improves the advanced technology in design of the Drill stem testing tools for well testing service.

We will design and choose the raw material of DST tools according to the customers' oil well condition, and make all our effort to supply the cost effective well testing tools to satisfy the customer.

Techcore insist on the traceability of each Drill stem testing tools and related DST parts
from the raw material to the finished products to meet on requirements of onshore and offshore standards.

Welcome to contact us for more information about the DST Tools!!

ZZ Top Oil Tools Co.,Ltd as head office registered in Xi’an City in 2010, and in 2016, ZZ TOP OIL TOOLS enlarged the downhole oil tools factory under the Brand - TECHCORE in Baoji, which engages in designing and manufacturing the downhole oil tools including DST tools, Coiled tubing tools etc.

As one group, ZZ TOP provides the clients highly efficient & expertise service as well as more comprehensive products to meet the customers' requirements during the work, and insists on "Traceability, Serialization" for each tools and related parts

Equipments List

Techcore specialized in design, manufacture and sales of the oil well downhole tools as below:

* Drill stem testing tools for cased hole,  open hole and slim hole:

Retrievable packer, circulating valve,safety joint, downhole tester valve,LPR- N Valve, multi-cycle circulating valve, hydraulic jar, shock absorber, RD safety circulating valve,CHAMP packer, IPO valve, tubing string test valve, drain valve,RD sampler, super safety valve etc.

* Coiled Tubing Tools: Double slip connector, roll on connector, roll on x thread connector, double flapper check valve, motor head, dual function circulating valve, hydraulic jar, fishing tools etc.

* Perforating tools: Various perforator & perforating gun system, Shaped Charge Body

 *Oil well completion tools include: Subsurface safety valve, wireline retrievable subsurface safety valve, single string production packer, dual strings production packer, ESP packer, mechanical set packer, permanent packer, compensation device, bridge plug, sliding sleeve, nipples etc. 

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