10 Doedijns Controls Oil Gas Sampling

June 26, 2018 | Author: Carlos Juárez | Category: Pipeline Transport, Petroleum, Liquefied Petroleum Gas, Valve, Oil Refinery
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Short Description

Oil Gas Sampling...

Description

Oil and Gas Sampling

DOEDIJNS

DOEDIJNS

Introduction

Scope of supply

Automatic sampling is an established method for providing a representative

Doedijns

sample of a pipeline transfer for the determination of bulk properties,

comprehensive range of sampling products and

especially water content, gravity and light ends for fiscal calculations,

systems.

scope

of

supply

now

covers

a

allocations and loss control. Products:

The main applications are for crude oils including HVP crudes, gas

• Pipeline mixing system.

condensates and associated liquids at production centres, export terminals

• Liquid and gas take- off probes, retractable

and refineries. Other applications include residual fuels, LPG and chemicals.

and fixed. • Direct in the line grab samplers.

Doedijns manufactures a range of automatic sampling equipment designed

• By-pass loop grab samplers.

originally with BP for sampling liquids in pipelines. This equipment is renowned

• High and low pressure sample vessels.

for its durability, proven by its decades of trouble free use on the North Sea

• Sample vessel mixing systems.

production platforms. Doedijns also has the capability to design and engineer

• Weighing systems.

complete sampling systems to meet the customer’s specific requirements

• Sample controllers.

and internationally accepted methods for accurate automatic sampling of hydrocarbon products. These methods are detailed in the standards:

Service and maintenance

ISO 3171, IP 6.2, API chapter 8.2 and Gost.

The service activities of Doedijns are supported worldwide. Working onsite, the service engineers

Systems:

of Doedijns ensure that technical challenges

• Inline sampling systems.

will be handled competently within the planed

• Fast-loop sampling systems.

schedule.

• Composite gas sampling systems. All service personnel have the relevant and required safety training to perform their tasks both on- and offshore.

Pipeline mixing 

Sampling probes

The energy available during pipeline transfer maybe enough to disperse

Doedijns designs and manufactures a range of

and homogenise the product sufficiently to enable representative sampling.

standard retractable gas and liquid probes, fixed

However, extra mixing will often be required. Doedijns supplies mixing

probes, and multi-point profiling probes.

solutions such as static and power mixers to increase the mixing energy required for representative sampling. These mixers are selected to meet the

Features:

C1/C2 mixing requirements found in ISO 3171.

• Suitable for pipelines from 4” NB. • Pipeline pressures up to 149 bar (Class 900). • Retractable under full line pressure. • Variable positioning of probe inlet. • Optional choice of materials. • Vortex Shedding calculations are applied to all probes. • Designed to fully meet ISO 3171, API 8.2 standards.

fixed probe 

static mixer  retractable probe 

DOEDIJNS

Receiver vessels The integrity of the sample during sampling operations is of the utmost importance. Portable receivers, when designed correctly, can provide the most reliable solution. Design of the receiver should take into account the medium to be sampled and the ability to easily mix the contents when connected to an external mixing system. Doedijns manufactures and supplies a range of low and high pressure receivers with various sizes typically from 0.5 to 20 litre.

Receiver mixing system Due to the lapse of time between taking a sample and the actual analysis, which maybe several hours, heavier components such as water can drop out and separate. It is therefore necessary that the contents of the receiver are sufficiently mixed in order to obtain a homogenous product before taking a sub sample for analysis. Doedijns manufactures mixing systems, either for permanent installation in sampling systems or as stand-alone units for use in laboratories.

1000 cc constant  pressure cylinder 

RMS 2O receiver mixing system 

PSR 10 / 10 ltr receiving can 

Liquid samplers 804 inline sampler

The 804 sampler extracts a fixed size sample of liquid directly from pipelines with diameters of 4 – 52 inches at pressures up to 149 bar. Manufactured in 100% stainless steel the sampler can be used on crude oils, 804m retractable sampler 

NGL, LPG, and residual fuels and chemicals. Dual sealing gives extended operating life. Available with an integral retractor device to enable positive extraction and

810 cell sampler

insertion in a live line.

The 810 Cell sampler is designed to be

Important advantages:

mounted in a standard 1 inch by-pass loop, with

• Enhanced safety when inserting or extracting.

pressures up to 149 bar. Also manufactured

• No need for special extended nozzles.

in 100% stainless steel, this grab sampler has

• Accurate dynamic positioning of

excellent durability. Its dual sealing system

the probe head.

makes it the most reliable sampler available

• Retractor device is always available.

even for wet and dirty crude oils. Designed

• Wetted parts available in

for simple maintenance, the top-works can be

other materials.

removed whilst the cell body remains in the loop. Replacement of the top works takes place in a matter of minutes. All samplers meet the ISO and API requirements for automatic hydrocarbon sampling. Doedijns can supply electrical or hydraulic samplers for locations where instrument air is not available.

810 cell sam pler 

DOEDIJNS

Sampling Systems

The systems are designed to meet international

With over 14 years experience of manufacturing sampling systems we are

standards such as: ISO, API, ASTM. The systems

able to supply custom built solutions to meet our client’s specific sampling

generally fall into two categories: In-line and

requirements.

Fast-loop.

When designing a system careful attention is given to a number of key areas, for example: ambient and process conditions, available space, piping class, hazardous area requirements, material traceability, testing, and documentation. We are also able to supply fully ATEX-certified systems.

Optional inline instruments BS&W / Density 

Isolation valve 804 In Line Sampler

Return

Auto-change system

810 cell sampler Flow indicator Flow control valve

  r   e   x    i   m   c    i    t   a    t    S

Auto-change system

Constant pressure cylinders

Pump Outlet

Pre-charge gas Fixed sample probe PSR 10/20 portable sample receiver cans Optional weighing system Flow

In-line sampling system 

Flow

Fast-loop sampling system 

In-line Sampling System

Fast-loop Sampling System

A cost effective method of extracting a representative sample directly from the

Where higher accuracy is required, such as in

pipeline is the In-line Sampling System. The system can be used for a broad

custedy transfer, then a fast-loop system is

range of refined and unrefined hydrocarbon products. Our model 804 sample

recommended. A representative sample is taken

probes have a range of lengths which are selected for a given pipeline diameter.

from the centre of the pipeline using our scooped

Extraction and insertion can be done manually or at full line pressure using our

take-off probe. The system is designed to maintain

extracting devices. The samples are typically collected in either atmospheric

isokenetic and homogenous flow throughout the

receivers or constant pressure cylinders. Both sampler and receiver vessels are

system. Our 810 bypass cell sampler extracts

housed in stainless steel or GRP enclosures with the following typical optional

a standard 1 cc sample and deposits this into

extras: insulation, heating, weighing system, automatic can-change system and

either atmospheric receivers or constant pressure

sample controllers.

cylinders. Some of the major advantages of this type of system apart from the higher accuracy are the ease of maintenance, reduced dead volume in the sample lines and the ability to accommodate other measuring devices such as water-cut (BS&W) monitors or densitometers. Housed in stainless steel or GRP enclosures, these systems may include many optional features as mentioned for the inline systems.

Gas Sampling Systems Doedijns also manufactures composite gas sampling

systems

in

accordance

customer’s specific requirements.

Fast-loop sampling system 

with

the

Doedijns Hydraulics B.V. Member of Doedijns International

Doedijns Hydraulics B.V. Member of Doedijns International

| Coenecoop 103 - 105 | 2741 PH Waddinxveen | The Netherlands | P.O. Box 179 | 2740 AD Waddinx veen | The Netherlands | t. +31 [0] 182 30 28 88 | f. +31 [0] 182 30 27 77 | [email protected] | w ww.doedijns.com

| Australieweg 10 | 9407 TE Assen | The Netherlands | t. +31 [0] 592 40 50 70 | f. +31 [0] 592 40 55 70 | [email protected] | www.doedijns.com

Doedijns International B.V.

Doedijns Asia Sdn. Bhd. (701989-P) Member of Doedijns International

| Coenecoop 103 - 105 | 2741 PH Waddinxveen | The Netherlands | P.O. Box 179 | 2740 AD Waddinx veen | The Netherlands | t. +31 [0] 182 30 28 88 | f. +31 [0] 182 30 27 77 | [email protected] | w ww.doedijns.com

| 11A Jalan PJS 7/19 | Taman Bandar Sunway  | 46150 Petaling Jaya | Selangor D E | Malaysia | t. +60 [0]3 5631 6733 | f. +60 [0]3 5632 6733 | [email protected] | www.doedijns.com

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