P3: Pressure Pipe Principles. Carl Thunem, EHS Audit Manager Encana Services Company, Ltd.

Transcription

1 P3: Pressure Pipe Principles Carl Thunem, EHS Audit Manager Encana Services Company, Ltd.

2 Pressure and Piping Project (P3) - Origins The P3 project was developed after a number of critical incidents and near hits indicated that our existing efforts and systems were not managing the risks sufficiently. Two fatalities occurred in the US Division in 2012 Further review showed Canada and the USA operations have experienced significant incidents and near hits related to pressure and piping issues 2

3 Pressure and Piping Project (P3) Six key principles: Expectations surrounding well shut-ins Managing personnel in line of fire areas Ensuring integrity of piping and pumping equipment including pipe restraints Safely managing flowback operations Adherence and conformance to established procedures Enhanced application of our stop work program 3

4 Pressure Defined Pressure is the continuous physical force exerted on or against an object by something in contact with it: the force exerted per unit area. Pressure = Force per unit of Surface Area Surface Area of a Pipe = PI x dia 2 4 Force = Pressure x Surface Area Low Pressure plus large area equals a greater force When we compare 100 psi to 10,000 psi, it is much lower, but the reality of 100 psi and the force it can exert is not as harmless as it sounds.

5 Examples of Pressure/Force Calculations Example 1 Example 2 Pipe diameter 12 Pressure is 100 psi Area = π x dia² 4 A= x 12² 4 A=113 sq in 100 psi X 113 sq in = 11,300 lbs of force Pipe diameter 3 Pressure is 10,000 psi Area = π x dia² 4 A = x 3² 4 A = 7.06 sq in 1600 psi X 7.06 sq in= 11,296 lbs of force

6 Incident Prevention What controls are used to try and prevent hazards and incidents in the workplace Hierarchy of Control Prior to work Engineering Administrative PPE Energy Source Management Immediately prior to and Elimination during work Control PPE/Space 7

7 Managing Energy Sources We manage pressure by: Eliminating it Controlling it, and/or Protection against contact These are covered in your FMEA s, SOP s, and JSA s!

8 Managing Energy Sources Eliminate the energy (pressure) - make sure that the pressure is not present! Remove the pressure by Discharging pressure Disconnecting lines Draining lines

9 Eliminate - Example

10 Control - Example Control the energy- the pressure is still present but it is under control! Close line Stop energy flow Modify the rate of release

11 Control - Example

12 Managing Energy Sources Protect against contact with pressure hazards using a barrier! Distance from the pressure source or potential line of fire Personal Protective Equipment

13 GROUP EXERCISE What tools and resources do you have to help you manage pressure? List them 14

14 Pressure Hazard Resources Encana Tools and Resources available to make informed decisions when working around pressure hazards. Observations Stop the Job LOTO/energy isolation Hazard ID s, Risk Assessments JSA s, MOC s Checklists and audits Ethos Practices/Forms Pressure & Pipe Principles EHS Safety Alerts/Bulletins Stand Downs

15 Discussion & Review Pressure Hazard Types Pressure Hazard Consequences Pressure Hazard Mitigations Pressure Hazard Site Assessment and Strategy Tools and Resources Roles & Responsibilities

16 GROUP EXERCISE You will be given a picture with several questions. In your group, discuss and write your answers on a flip chart 17

17 Replace Nozzle on Pressure Washer What could go wrong? What are the pressure hazards? Where should workers be standing while doing this task? Are there other energy sources or hazards? 18

18 What could go wrong? Working around Pressured Piping What are the pressure hazards? Where should workers be standing while doing this task? Are there other energy sources or hazards? 19

19 20

20 Group Discussion: Personnel Placement What could go wrong? What is the pressure hazards? Is everyone positioned safely to complete this task? Are there other energy sources or hazards? 21

21 Line of Fire: Consequences Consequences Personal Injury or Death Damage to Equipment 22

22 No Go Zones 23

23 Personal Risk Assessment Stop THE Job, or Stop YOUR Job 24

24 Take Away In the field you may see A worker in an at-risk position while pulling a gauge A piece of equipment arrives on site and stops in an unsafe place A group of workers in a non-routine activity who may have not considered the line of fire What are you going to do? STOP the job or an OBSERVATION and ask them 25

25 Serious Injuries Persist Completions Lost Time Injury: While prepping to P&A a well, a mechanical failure occurred causing a high pressure release of gas and fluids (nipple between B-section and gate valve blew out launching gate valve 60+yds., and releasing casing pressure). resulting in the injury of two service provider employees, one seriously.

26 Reinforcement Efforts Implemented Interim P3 Awareness Plan developed and implemented: P3 training for contractors, supervisors and employees Safety management/expectations training for all supervisors Safety Stand-Down for all operations Adopt-A-Contractor refocus on P3 Operations SOP Review/Revision Enterprise-wide reinvigoration on P3 Principles with many of same elements above

27 Company-wide Communications Plan Efforts continue across company on communication, implementation, training, etc. from initial P3 launch November / December monthly safety topic ECN Bulletin: Pressure Hazards and P3 to COO organization (11/20/14) EH&S Alert (12/1/14) ISNetworld communication and contractor (12/31/14) / service provider sign-off (Q1-2015) Piceance integration

28 Questions?

29