Gate valves

The gate valves manufactured by PGNiG Technologie S.A. have gained acclaim in all application types: pipelines, Christmas trees, wellheads and manifolds. They meet or exceed the API 6A and API Q1 requirements. The basic component of a gate valve is a soild gate that assures a reliable seal over a wide range of operating pressures, bore sizes and operating conditions, including corrosive and erosive environments.

The slab style gate design is easy to maintain and provides a perfectly sure seal in both low and high pressure ranges where solids deposited by the medium would cause sealing problems. The slab style gates are used in type K and E valves. All gate valve models available from PGNiG Technologie S.A. are available as hydraulically actuated or manually operated.

Gate valve features:

  • API Spec. 6A compliant design ,

  • full-bore flanged or threaded end connections,

  • metal-metal seals: gate to seat, body to bonnet, and stem to bonnet,

  • stellite finished and parallel working surfaces of the seats and the gate,

  • hot servicing: gland replacement,

  • gate valve inner lubrication,

  • bearing lubrication,

Gate valve type K

Features:

  • API Spec. 6A compliant design ,

  • standard version with flanged conncetions, available with threaded ends or integrated in the solid block tree body,

  • available sizes: 1-13/16 to 9” x 8”; available pressure ratings: 2,000, 3,000, 5,000, 10,000, 15,000 psi,

  • two-directional medium flow for versatility of operation and extended service life,

  • metal-metal seals: gate to seat, body to bonnet, and stem to bonnet,

  • the design assures seal at low and high operating pressures,

  • the simple and reliable gate and seat design streamlines servicing,

  • gate valve control: manually operated or with a hydraulic actuator,

  • the stem seal is designed for the full range of operating pressures, temperatures and media,

  • easy closing and sealing without excessive force,

  • emergency sealability (during hot operation) of the bonnet to stem void,

  • gate valve internal and stem seal chamber can be lubricated,

  • easy lubrication of bearings,

  • easy mounting and removal of the control wheel with a snap-lock,

  • safe control wheel design without pointed details.

Gate valve type E

Features:

API Spec. 6A compliant design ,

standard version with flanged ends, available with threaded ends or integrated in the solid block tree body,

available sizes: 1-13/16 ” to 9” x 8”; available pressure ratings: 2,000, 3,000, 5,000, 10,000 psi,

two-directional medium flow for versatility of operation and extended service life,

metal-metal seals: gate to seat, body to bonnet, and stem to bonnet,

the design assures seal at low and high operating pressures,

the simple and reliable gate and seat design streamlines servicing,

gate valve control: mamually operated or with a hydraulic actuator,

the stem seal is designed for the full range of operating pressures, temperatures and media,

emergency sealability (during hot operation) of the bonnet to stem void,

gate valve internal and stem seal chamber can be lubricated,

easy lubrication of bearings,

easy mounting and removal of the control wheel with a snap-lock,

safe control wheel design without pointed details.

Gate valve build versions

The gate valves with threaded ends are manufactured as an alternative to flanged-ends.

The hydraulic actuators are installed on reverse-action gate valves. Installed as a part of the valve safety system, the hydraulic actuator automatically closes the gate valve when its control pressure is removed. When reconnected to the supply pressure, the actuator reopens the gate valve. The solution is recommended for large bores and high pressure values.

Wellheads are desinged for suspension of casing strings and sealing of annulus according to API Spec. 6A and customer requirements. The wellheads manufactured by PGNiG Technologie S.A. meet or exceed the requirements of API Spec. 6A and ISO 10423. Thanks to the wide variety of design solutions, the wellheads enjoy numerous application in the oil and gas industry, as well as in geothermal wells.

Sealing is the critical structural component of wellheads. The sealing selection depends on the deposit parameters, i.e. the operating pressure, temperature and medium type. The sealing optimum configuration and types of seals are selected according to customer needs.

Four types of casing string seals are used and designed to the entire range of operating pressures, temperatures and media present in the oil and gas industry. The wellheads are available in single- and multi-body versions, with the casing diameter range from 4 1/2” to 20”. The bottom body to casing connections are available in three versions: threaded (e.g. BC thread), welded or bolted. The Oil & Gas Infrastructure Production Division has also developed the Slip Loc System, a bolted connection with a double energised seal which significantly reduces the make-up time by eliminating welding. The wellheads from our Production Division save time on assembly and reduce the servicing costs.

Więźba rurowa jednokadłubowa

Więźba rurowa dwukadłubowa

Wellheads: casing seals

Wellheads may have four types of casing seals. The seal type depends on the operating pressure, temperature and medium type.

Seal type W

This is an independent seal assembly installed over the slip hanger. Components:

  • metal ring,

  • plasticizer engaged energised seal at the casing contact,

  • double O-ring seal with supports between the metal ring and the wellhead body.

This seal is mounted after trimming the casing.

Seal type W

Seal type DC

The so-called thrust seal features two metal rings, a rubber gasket and a set of fastening bolts which engage the seal. This seal type is bolted to the hanger slip housing, which prevents the seal upward movement under pressure acting from the bottom.

This solution is maintenance-free and does not require resealing with plasticizers during the service life.

Seal type DC

Seal type CR

The type CR seal is engaged by the very weight of the casing. The seal is located under the casing string hanger and features a square-section elastomer ring with a metal ring underneath.

Seal type CR

Seal type D

The type D seal, or a double-lip seal, features an elastomer gasket and two thrust rings, one on the top and one on the bottom of the gasket. This seal is installed over the slip hanger. This seal is mounted after trimming the casing.

Seal type D

Wellheads: Slip Loc solution

The Slip Loc System is a bolted connection with a double positive seal. With the need for welding eliminated, the system greatly reduces the make-up time and can be an excellent alternative to the standard solutions, especially when assembly can be difficult.

The solution:

The wellhead lower body is usually connected with the first casing using threaded or welded connection. An alternative for both connection styles is the Slip Loc System.

Wellhead and Christmas tree

This compact version of the equipment manufactured by the Oil & Gas Infrastructure Production Division of PGNiG Technologie S.A. meets API Spec. 6A and is a part o the time-saving system for maximum speed of borehole make-up work, reduction of work accident risks to the operators, and major cost-efficiency.

Key advantages:

  • the BOP assembly/disassembly stage is eliminated, which reduces the risk to the operators: the design allows the next two drilling stages to be carried out without removing the BOP,

  • the 2-7/8” tubing hanger is inserted through 5-1/8” gate valves,

  • the 2-7/8” tubing hanger can rest on support pins.

The design enables great time and cost savings. The work on a single borehole can be reduced by 2 full days.

The Company carries a wide range of basic and special versions of Christmas trees. Available Christmas tree types:

  • solid block tree,

  • dual bore tree,

  • leaching tree,

  • for undergound gas storage facilities with injection line, for feeding various substances into the casing string annulus,

  • brine tree,

  • geothermal tree,

  • special equipment tree, e.g. with a cage choke for NG flow control,

  • ESP equipped for well development where a downhole pump is required.

The trees can be configured with manually controlled or hydraulic-powered gate valves. The Christmas trees manufactured by the Production Division meet or exceed API Spec. 6A and ISO 10423 requirements.

A number of seal types are applied for the tubing hanger body. The seal type is selected for each specific case and depending on the operating pressure, material class and size of the tubing. The configuration and detailed solution requirements are individually agreed with the customer according to their needs and to API Spec. 6A.

Standard trees

Application

The trees are manufactured in two versions, i.e. as the standard Christmas trees, and the compact solid block trees. The latter version has the gate valves integrated within the tree body, which reduces the overall weight.

The trees feature a number of design solutions adjusted to specific customer requirements. The trees are manufactured in the material class range from AA to FF, the operating pressure range from 2,000 to 15,000 psi, and the bore diameter range from 2 1/6” to 9”.

Dual bore tree

Application

The dual bore tree is applied in production of oil or gas from two horizons. The Christmas tree features a COH hanger for suspension of two tubing strings next to each other.

The hanger body has elastomer seals.

Leaching tree

Application

The leaching tree is designed for leaching off storage chambers in underground NG facilities. The design enables simultaneous injection of water and reception of brine.

Injection line tree

Application

The design features an injection line for feeding various substances into the tubing annulus, e.g. corrosion and oxidation inhibitors, paraffin solvents, etc. The injection can be done at the desired depth. Moreover, the tree can also accommodate a control line for operation of the subsurface safety valve. The tree features a CTH hanger with the pin-engaged elastomer seal. The hanger neck has a metal-metal seal of both the injection and control lines.

Brine tree

Application

This tree type is used in saline chamber leaching processes.

ESP tree

Application

This tree design is used for production from boreholes where a downhole pump is required. This solution has the tree hanger equipped with a special port for admission of the supply line through the hanger. The joints within the hanger body are sealed with a special sealing kit.

Coiled tubing Christmas tree connector

Application

This is a connection for hanging of the tube used in the coiled tubing operation. The solution enables several operations to be done on a borehole, e.g. running of downhole tooling, acid treatment, deposit zone treatment, and injection of production boosting substances.

Accessories

VR 2-1/16” - NU 1.9 plug

The plug stops and seals the side ports of the wellhead or tree for hot (pressurised) replacement of a (emergency) gate valve directly bolted to the body. Available material classes: MC = AA and EE.

BPV - H

The plug closes the hanger bore and allows replacement of the emergency gate valve.

Tester - protector running tool

A universal tool. Available material classes: MC = AA and EE.

Protector

The protector is installed in the wellheads to protect the sealing faces and mating faces of the slips from mechanical damage caused by drilling.

Chokes are applied to control the medium flow. The chokes manufactured by the Oil & Gas Infrastructure Production Division are available in positive and adjustable versions, in the dimensional range from 1 13/16” to 4 1/16”, and the operating pressures of 2,000, 3,000, 5,000 and 10,000 psi.

The manifolds are commonly used to control the medium flow rate. The usual components of a manifold include a set of gate valves, a positive choke and/or an adjustable choke.

The manifolds are designed strictly to customer requirements.

For many years, PGNiG Technologie S.A.’s Production Division has been designing and manufacturing a whole range of instruments, equipment and installations for oil and natural gas production, treatment and transmission.

The Company has the required production floors, engineering equipment, experience and highly qualified staff for end-to-end construction of oil field and gas field facilities, from well development to transmission stations.

The Company cooperates with several renowned design engineering businesses on conceptual and design stages and during project execution. This results in continuous improvement of the design and quality of our instruments.

Pre-separators and horizontal & vertical separators

Pre-separators

Application and operating principle:

The raw gas is fed into the separator for pre-treatment. When the gas passes an assembly of lamellar labyrinths, the deposit water and other mechanical impurities are stripped from the stream. The separator features connection ports for pressure gauges, thermometers, controls, level indication and a liquid gauge. The bottom chamber is heated and thermally insulated.

The separators can be delivered, on customer request, complete with fittings and the control and measuring instrumentation, as agreed on an individual basis. Each separator is subject to acceptance by a Notified Body.

Vertical separators

The two-phase separator is designed for pre-separation of gas following pressure reduction and into two fractions: the NG and the formation fluid. In order to improve the separation performance, the top section of the separator features a labyrinth insert where the liquid is condensed. The separated formation fluid flows down through a manifold pipe to the separator bottom section and leaves the assembly via a drain port into the drainage installation, becomes degassed and enters its storage tank. The separator features connection ports for pressure gauges, thermometers, level indicators, and a manual and automatic liquid drain port.

The separators are also available with a heating coil. The bottom part of the vessel is thermally insulated. The device is designed for vertical orientation of installation. The separators can be delivered, on customer request, complete with fittings and the control and measuring instrumentation, as agreed on an individual basis. Each separator is subject to acceptance by a Notified Body.

Horizontal separators

Application and operating principle:

The horizonstal separator is designed for pre-separation of gas following pressure reduction and into two fractions: the NG and the formation fluid. In order to improve the separation performance, the equipment features a labyrinth insert where the liquid is condensed. The inclined design of the separator forces the flow of the entrapped liquid into its bottom sections, which the liquid leaves via a drain port, into the installation that feeds the storage tank. The separator features connection ports for pressure gauges, thermometers, level control (indicator).

The horizontal separators are available with a heating coil. The horizontal separator vessel is entirely clad in thermal insulation and subject to acceptance by a Notified Body.

Filter separators

Application and operating principle:

A filter separator precisely separates water and solid particles from gas. The raw gas is forced into the filter separator, inside of which its flow passes the filter candles on which the water is condensed. The purified gas is released for downstream processing, and the removed water is drained into a degasifier unit, followed by the formation water tank. The filter separator has a quick release cover for running maintenance of the filter candles.

The filter separator can be delivered, on customer request, complete with fittings and the control and measuring instrumentation, as agreed on an individual basis. Each instrument is subject to acceptance by a Notified Body.

Gas filters

Application and operating principle:

The gas filter is designed to thoroughly scrub natural gas from water and solid particles. The raw gas is forced into the filter, inside of which its flow passes the filter candles on which the water is condensed. The dry gas is released for downstream processing, and the removed water enters a degasifier unit, followed by the formation water tank. The gas filter features a quick release access cover for running maintenance of the filter candles. The gas filter is designed for operation in the horizontal orientation.

Each instrument is subject to acceptance by a Notified Body.

Application and operating principle:

The gas dehydration column is intended for fine removal of low water levels from natural gas at the final NG gas drying stage before introduction to an industrial pipeline. The dehydrator applied in the unit is DEG or TEG. The complete equipment of this unit includes: a gas distributor, Tarflen (PTFE) demisters, a contact infill, a DEG/TEG distributor, a heating coil, and consoles for access platform installation.

The column features connection ports for temperature and pressure measurement, a liquid gauge and a level control. The gas dehydration column technical specification and sizing are chosen individually at the design stage depending on the deposit produced and production facility parameters. The gas dehydration column is designed for maintenance-free operation and each unit is subject to acceptance by a Notified Body.

Application and operating principle:

The mercury sorbent traps scrub mercury vapours from NG. The raw gas is forced into the trap tank and passes a layer of carbon sorbent that is installed between the internal grating and absorbs the mercury vapours. The scrubbed NG is then transmitted for downstream processing. The sorbent trap features two handling hatches for filling and removal of the carbon on the grating.

The mercury sorbent trap features connection ports for pressure gauges, thermometers, level indicators and liquid drainage. The mercury sorbent traps can be delivered, on customer request, complete with fittings and the control and measuring instrumentation, as agreed on an individual basis. Each column is subject to acceptance by a Notified Body.

Heat exchangers

Application and operating principle:

The heat exchangers are designed for heating processed NG with TEG, steam or gas. The units are intended for horizontal installation and clad in thermal insulation. The heat exchangers are subject to acceptance by the Office of Technical Inspection. The standard delivery version does not include accessories or thermal insulation. The commercial names of the heat exchangers are WTG, WPG, WGG or WTT exchangers. The abbreviations designate the operating media used for heat exchange.

Heaters

Application and operating principle:

NG treatment requires increasing the temperature of the medium. Most often the heaters operated with steam as the heating medium are used to accomplish this. This way the NG transmitted from pre-separators for downstream processing is heated. Steam is also used to heat the gasoline drain from expansion separators. The heater technical specification and sizing are chosen individually at the design stage depending on the deposit produced and production facility parameters. Each instrument is subject to acceptance by a Notified Body.

The Production Division also manufactures a whole gamut of tanks and vessels for various applications essential for oil and gas treatment plants. These include:

  • deposit water tanks,

  • condensate tanks, also complete with degasifiers,

  • methanol tanks,

  • TEG storage and drainage tanks,

  • gasoline tanks,

  • chelate tanks, etc.

  • low pressure double shell tanks,

  • non-pressure double shell tanks.

The tank technical specification and equipment are chosen according to the individual requirements of specific plants. The tanks may be thermally insulated, outfitted with heating systems, made in one or two shells, and for standalone or buried installation.

  • Elements produced in PGNiG Technologie SA operate on offshore platforms in various parts of the world, mainly in China, Korea and India but also in Brasil and Ireland.

  • Offshore equipment is mostly produced based on client documentation but our engineers have a significant contribution to the product improvement process.

  • large steel structures

  • single- and multi-member steel masts,

  • with lacing and latticework

  • truss girders, plate girders and box girders

  • solid wall, openwork and laces support beams

  • steel hall structures

  • steel support structures for steel tanks

  • highly processed steel structures

  • platforms, stairways, ladders, railings, barriers, steps,

  • access doors and guards

  • skids, frames and containers

  • gantry crane trestles

  • support crossbars

  • handling and loading slings

  • silos, chutes and pressure tanks

  • civil and machinery structures

  • welded sections and shapes

  • welded structures for coal mining as well as oil & gas industry

  • steel structures for oil platforms

RANGE OF PRODUCTS & SERVICES

See what we offer