Operations for Layflat Hose in Oilfield Water Applications

API RECOMMENDED PRACTICE 15WT FIRST EDITION, DECEMBER 2019

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Contents

Page

1. Scope 1

2. Normative References 1

3. Terms and Definitions 1

4. Acronyms and Abbreviations 4

5. Pre-Job Planning 5

   1. Risk Assessment Guidelines 5

   2. Route Selection General Guidelines 5

   3. Road Crossings Design 5

   4. Water Way Crossings 8

   5. Boring Designs 8

   6. Hose Assembly System Design 9

   7. Pressures 10

   8. Calibration 11

   9. Alarm Systems 11

   10. Automatic Shutdown Devices 12

   11. Restart after Shutdown 12

   12. Signage for Water Transfer 12

   13. Weather Effects 12

   14. Community Relations 12

6. Handling and Storage of Layflat Hose 13

   1. General 13

   2. Layflat Hose Storage 13

   3. Retrieval and Respooling 14

7. General Layflat Hose Deployment 17

   1. General Guidelines 17

   2. Pulling a Layflat Hose 18

   3. Layflat Hose Under Pressure 18

   4. Moving the Hose During a Job 18

8. Water Transfer Operations 19

   1. General 19

   2. Pump Connections and Other Fittings 19

   3. Extended Shutdowns 20

   4. Environmental and Weather Limitations 20

   5. Operational Monitoring 21

   6. Operational Documentation 22

9. Pre-Job Testing 22

   1. General 22

   2. Hydrostatic Leak Test 23

10. Spill Response 24

    1. Spill Response Plan 24

    2. Spill Response Kit 24

Contents

Page

Annex A (informative) Layflat Hose Marking 26

Annex B (Informative) Lay Flat Hose Assembly Tracking 27

Bibliography 28

Figures

1 Ski Rope Example 18

Operations for Layflat Hose in Oilfield Water Applications

1. Scope

   
   

   This document provides guidelines and establishes recommended practices for the operation of layflat hose used for the transportation of water associated with onshore upstream oil and gas operations, to prevent damage of layflat hose and damage of layflat hose assemblies. This document covers the transportation of formation water, injection water, brackish water, fresh water, and saline. The scope of this document excludes the initial and final connections of the layflat hose to the source and receiving points.

   
   

2. Normative References

   
   

   There are no normative references in this document.

   
   

3. Terms and Definitions

For the purposes of this document, the following terms and definitions apply.

3.1

abnormal pressure

Pressure observed within the hose assembly system that falls outside the normal operating pressure ranges.

3.2

bend radius

The minimum bend radius one can bend a hose without kinking it, damaging it, or shortening its life.

NOTE At maximum allowable working pressure, a hose can be bent in a smaller radius without kinking than at lower pressures.

3.3

brackish water

Water classified as brackish by local jurisdiction based on its dissolved solids concentration.

3.4

catch point

A designated location where a pig will lodge or be caught after it has traveled its course and removed water from the hose assembly system.

NOTE This is also known as a “pig catcher.”

3.5

design pressure

The maximum expected pressure the hose assembly system will be exposed to along a route.

NOTE This pressure is based on the flow rate, fluid being transported, topography, hose diameter, equipment specifications, and other factors as determined by the hydraulic analysis.

3.6

fresh water

Water classified as fresh by local jurisdiction based on its dissolved solids concentration.

3.7

hose assembly

A length of layflat hose with attached couplers on both ends of the hose.