downhole safety valve quotation

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There are many uses of valves - mainly controlling the flow of fluids and pressure. Some examples include regulating water for irrigation, industrial uses for controlling processes, and residential piping systems. Magnetic valves like those using the solenoid, are often used in a range of industrial processes. Whereas backflow preventers are often used in residential and commercial buildings to ensure the safety and hygiene of the water supplies. Whether you are designing a regulation system for irrigation or merely looking for a new replacement, you will be able to find whatever type of subsurface safety valve that you need. Our products vary from check valves to pressure reducing valves, ball valves, butterfly valves, thermostatic mixing valves, and a lot more.

The Super Safety Valve is a sort of Fail Safe Safety Valve for well testing from a land or jack-up rig. The SSV is normally run inside or below the Blow Out Preventer (BOP) and is used to control well flow. The ID is 3.0 in., OD is 8.0 in., and the working pressure of Super safety valve is 15,000 psi. This safety valve has a port for chemical injection downhole or to control a subsurface safety valve. It is capable of cutting wireline and coiled tubing using the nitrogen charge or by application of balance line pressure.

* With two hydraulic lines and a chemical injection port, the super safety valve is designed to close by spring force but has a nitrogen charge chamber to quicken the closing time.

Typically, the nitrogen charge chamber of the valve is charged with nitrogen to 1000 to 1500 psi. This charge is sufficient to cut 7/32 inch mono-conductor cable, but it is not adequate to cut coiled tubing. The valve can be charged with nitrogen sufficient to cut coiled tubing, but this raises the required hold open pressure. The tool is capable of cutting 1.50 inch OD x 0.125 inch wall thickness coiled tubing by application of balance line pressure. Halliburton T&T Engineering should be consulted whenever coiled tubing cutting is anticipated.

*Drill stem testing tools: RTTS packer, circulating valve, safety joint, select tester valve, omni valve, hydraulic jar, shock absorber, RD safety circulating valve, high pressure retrievable packer with bypass, IPO valve, tubing string test valve, and so on.

*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.

Our downhole safety valves provide your testing operations with fail-safe sustained control downhole in the event of an emergency or to facilitate test procedures.

PLUSCO 621-622 Safety Valve Sealant will improve the overall performance of the safety valve by insuring a continuous seal for extended operation. It eliminates line leaks, improves the hydraulic pump performance, maintains tighter seals and valve seating and reduces fluid friction in the system. The benefits of sealing, lubricity and operations efficiency are provided by PLUSCO 621-622 Safety Valve Sealant. Safety Valve Sealant will insure a continuous flow of the gas well without interruption or unnecessary shutdown.PLUSCO 621-622 Safety Valve Sealant is available in two grades depending on the severity of the leak in the system.

PLUSCO 621-622 Safety Valve Sealant is a high tech safety valve additive specifically designed for sealing hydraulic controlled surface or subsurface safety valves.PLUSCO 621 is designed for slow weeping leaks while PLUSCO 622 is for heavy pinhole type leaks.

The WellStar® tubing-retrievable safety valve is a general production, hydraulically operated, downhole TRSV. The rugged hydraulic actuator of the WellStar safety valve provides durability and isolates the internal workings from well fluids through its unique construction. The metal-to-metal (MTM) sealing integrity in the body joints and closure mechanism places it in a premium valve category while featuring an economical price. Proven through years of installations, the simple, compact design enhances the valve’s overall reliability and provides for trouble-free operation.

Surface Controlled Subsurface Safety Valve failure data from 14 North Sea fields have been collected and failure rates for the various valve types and makes calculated. Failure rates have been compared to well data in order to identify critical well parameters and give guidance to operators when selecting valves for new fields.

Finally, models are developed for calculating well safety and production availabilities. Input to these models is failure rates, testing and maintenance routines, frequency of other well service operations etc.

Most people involved in production of oil and gas from high pressure reservoirs will probably agree that the Down Hole Safety Valve is one of the most important components for controlling blowout risk. In particular this is the case offshore where one platform may be producing from more than 30 wells. In such situations it is very important to be able to shut off the wells with a down hole device if a hazardous situation should arise on the platform.

In spite of this importance, there are still endless arguments regarding what kind of safety valve to use, e.g. from which manufacturer, flapper or ball valve, or maybe to install two valves in series. No clear cut criteria for selecting valves for various types of fields and uses exists. The study documented this paper was aiming at recommending such criteria, based on an investigation of past safety valve performance in North Sea fields. In this area only surface Controlled Subsurface-Safety Valves (SCSSV) are used, and the study is therefore restricted to this type of valves.

The selection criteria that were sought, should reflect both well safety and production availability. Disregarding one of these factors will inevitably result in suboptimal solutions.DATA COLLECTION

To obtain a reasonably correct picture of past SCSSV performance, all major operators in the North Sea area were contacted, and asked to participate in the study by releasing their data regarding valve failure statistics and field parameters. Fortunately, most operators were willing to release their data, provided the information was published in a pooled manner. The information necessary wasValve type, make and dimensions

Field data (e.g. reservoir type, pressure, temp., H2S and CO2 content, GOR, oil gravity) From the 10 operators supplying data from a total of 14 fields, it was possible to obtain a sufficient amount of data for the following valvesWire line Retrievable (WR) valves:–

A surface-controlled subsurface safety valve (SCSSSV) system without external wires or hydraulic lines needed for the valve"s operation is now available to the petroleum industry. Any of the current down-hole safety valves, such as Hydril, Otis, Camco or Baker, can be fitted to the valve operator. This is a totally fail-safe valve system, which can be overridden manually at the operator"s choice to accomplish a number of different modes. The valve"s operator is acoustically controlled by the operator"s predetermined settings at the surface. The predetermined settings at the surface. The receiver, translator, and valve actuator are packaged and placed in a special mandrel that is packaged and placed in a special mandrel that is run as a part of the tubing string. The hydraulic valve operator is mounted on a length of production tubing between the mandrel and valve. The full-flow valve is at the bottom of the down-hole string. Any length of production tubing may be run below the valve. Hookwall hangers can be run in as may be needed.

With the movement of the oil industry into the more or less hostile environment of offshore operations, it was apparent immediately to the oil operators that an automatic "fail-safe" valve was needed for the producing oil or gas "flow string".

A valve was produced that would respond to changes in flow rate either above or below levels preset into the valve. The first valve to be so adapted and so employed was the differential pressure, spring-loaded valve. Abnormal increases in the flow rate across the valve caused it to close. This valve was very simple in construction, could be set in the production string and removed by means of a production string and removed by means of a wireline. The differential pressure valve and its "sister" valve, the ambient pressure valve, which closed automatically if the rate of flow or resultant pressure across the valve dropped below a preset valve. These safety valves became known to the oil industry as "storm chokes", but actually the term "storm choke" is a registered patent term; therefore, such valves should only be referred to as down-hole production string safety valves. production string safety valves.

Intermediate spool inserted below the Chrtistmas tree; spool provides a profile for landing the control line hanger and hydraulic penetration to allow control on WCS Safety Valve

Weatherford’s Brian Marr, Scott Carline and Scott Deyoung discuss how the Renaissance WDCL system enabled the retrofitting of a new control line inside existing tubing to reestablish connection with a surface-controlled subsurface safety valve (SCSSV). The installation, which was performed without a workover rig, improved production at a significant cost savings.

The well, an offshore oil producer in the Middle East, was required by law to include a SCSSV. Like all downhole safety valves, SCSSVs act as a failsafe to prevent the uncontrolled release of reservoir fluids in the event that surface wellhead integrity is lost. These valves are popular well control options in the industry due to their ease of operation, which consists of hydraulic control from the surface. Hydraulic pressure is applied down a control line connecting the valve to surface. During normal well operation, the continuous application of this hydraulic pressure keeps the valve open. When hydraulic pressure is removed during a wellhead integrity event, the valve is forced shut, thus acting as a failsafe to isolate the wellbore.

However, SCSSVs are prone to malfunction, which is commonly caused by piston failures, leaks within the valve body or some type of control line failure such as crushing, leaking or blocking by an obstruction. Such a control line failure occurred in the offshore Middle East well, which forced the valve closed and shut in production.

The conventional remediation method calls for bringing in a workover rig to pull the tubing, replace the blocked control line and then redeploy downhole. While this option is relatively cost-effective and easy to implement in an onshore well, the logistics, cost and complexity of performing a workover offshore make this a time-consuming and expensive operation. Even a relatively simple workover of an offshore well in the Middle East might cost upwards of US$6 million, according to estimates from the operator. Weatherford collaborated with the operator to develop an alternative process— an intervention that would restore functionality to the SCSSV by retrofitting a new control line and inserting a new valve within the existing well architecture. The operator required the intervention to be performed without killing the well, pulling the tubing or incurring the time delays and costs that commonly come with a major workover.

Upon review of the well parameters and intervention requirements, the operator decided to deploy Weatherford’s Renaissance WDCL system, a wirelineretreivable subsurface safety valve that allows both the control line and the safety valve to be replaced in a straightforward retrofit procedure. The system has a modified packing mandrel and wet connection, and a valve-and-lock assembly that can be installed in an existing tubing-mounted safety valve or safety-valve landing nipple. A capillary line is then run from the surface inside the tubing and connected to the valve to provide control. The retrofit process for this offshore well was performed from a jackup rig, and began by modifying the wellhead to provide the correct profile for the capillary hanger and gain access for the new capillary control line. A wireline crew set plugs in the well to keep the well isolated, after which the tree was pulled and a spool piece containing a hanger profile was installed. The tree was then reinstalled and after the wellhead was pressure tested, the wireline crew went back in and pulled the plugs.

Another trip downhole was conducted to lock open the existing tubing-retrievable safety valve, after which a new subsurface safety valve was deployed and landed inside the previous valve. Once the new valve was set, the capillary control line was run down the center of the tubing to a pod on the valve.

A weighted and centralized stinger placed at the end of the capillary string was used to join the capillary to a mating connection on the valve. This was a wet-connect assembly, which was hydraulically locked in place by applying pressure to the capillary string. The wet connect contains unique design features, including the ability to be mated and unmated should the capillary need to be removed, and dual-back check valves that prevent backflow through the capillary line as an additional safety feature.

The top end of the capillary was then landed into the new spool piece below the tree through a specially designed, 4-in. control-line hanger. A Type-H profile was provided above the hanger to allow for the installation of a backpressure valve, which would be required to secure the well during future wellhead maintenance.

Picture of the WDCL Subsurface Safety Valve in the closed position (flapper shown in gold), the blue highlights the flow path of hydraulic fluid to function the valve.

The Renaissance WDCL was installed without incident, allowing the operator to bring the well back to full production quickly, while adhering to offshore safety regulations in the region.

A new spool piece was placed below the lower master valve on the wellhead. The spool piece was custom-built with a profile to lock the control line hanger in place, and polished bores for the seals.

A safety valve is a valve that acts as the protector of your equipment. Safety valves can prevent damage to your pressure vessels and even prevent explosions at your facility when installed in pressure vessels.

A safety valve is a type of valve that automatically actuates when the pressure of the inlet side of the valve increases to a predetermined pressure, to open the valve disc and discharge the fluid. The safety valve system is designed to be a fail-safe so that a wellbore can be isolated in the event of any system failure or damage to the surface production-control facilities.

In most cases, it is mandatory to have a means of closure for all wells capable of natural flow to the surface. The installation of a subsurface safety valve (SSSV) will provide this emergency closure capability. Safety systems may be operated on a fail-safe principle from a control panel located on the surface that was custom-built by PHC.

The SCSSV is controlled by a ¼” stainless steel control line that is attached to the outside of the well tubing string and installed when the production tubing is installed. Depending on the wellhead pressure, it may be necessary to keep as much as 10,000 psi on the control line to keep the valve open. PHC control panels feature the proven Haskel pump line that generates the required hydraulic pressure for optimal valve control.

The TSS series subsurface safety valves are tubing retrievable surface controlled subsurface safety valves. Compared with the TS series, the safety valve features super slim outer diameter design. The control line connects the valve to the surface, and the pressurization from surface on the control line controls the opening and closing of the flapper. This series of products includes self-equalizing and non-equalizing types.