1  

TECH-SEAL INTERNATIONAL

3131 West Little York Rd Houston, Texas 77091

Phone: 713-691-0668

Fax: 713-358-9330

Adjustable Choke Operation and Maintenance Manual

Revision: 0

Date: 6/06/2013

Approved By: J.A

2  

TABLE OF CONTENTS

1. Introduction ……………………………………………………………………….page 3

2. Choke Specifications & Features………………………………………………….page 4

3. Choke Operation…………………………………………………………..………page 5

4. Exploded View…………………………………………………………………….page 6

5. Maintenance……………………………………………………………………….page 10

6. Contact information……………………………………………………………….page 18

3  

INTRODUCTION:

The 2” Adjustable Chokes is field-proven design which have been manufactured by Tech-Seal International from the high quality material. Tech-Seal Chokes conform to current API requirements, both functionally and in term of calculated stresses. Adjustable Choke is used to control flow rate; it is an important part of a manifold controlling downstream pressure and flow rates during flow-back process.

4  

2” 1502 ADJUSTABLE CHOKE SPECIFICATION & FEATURES:

Specifications:

2” 1502 Female Inlet x 2” 1502 Male Outlet

10,000 psig CWP/ 15,000 psig CWP

¾” max Orifice and 1.00” max Orifice

¾” FL/TC and 1.00” FL/TC Seats

Solid carbide Tip

Features:

Low Maintenance

Easy to read position indicator

Thumb Screw for locking steam

Available as 2 types: Adjustable Choke and Positive Choke

Forged steel bodies

Available H2S service (NACE MR-01-75)

Choice of orifice sizes

Easy to convert orifice sizes in field

5  

CHOKE OPERATION:

The 2” 1502 Adjustable Choke features the needle and seat design to allow controlling pressures and flow rate. The choke is operated by turning the hand wheel in CW or CCW in order to obtain a specified downstream pressure, or a desired flow rate. When the desired flow rate or specified pressured is achieved, the thumb screw will be used to locked the stem in fixed position. The choke comes with a position indicator. It is used to determine the bean size needed for the positive choke. Every number on the position indicator represents the equivalent orifice diameter in 1/64th of an inch.

NOTE:

THIS ADJUSTABLE CHOKE IS NOT DESIGNED TO PROVIDE A POSITIVE SEAL.

THEREFORE, AN ISOLATION VALVE SHOULD BE USED IN CONJUNTION WITH THE CHOKE.

6  

EXPLODED VIEWS & PART LIST THE THREE MAIN ASSEMBLIES OF THE CHOKE:

Bonnet Assembly

Choke Tee Body

Choke Saver Assembly

7  

2” 1502 POSITIVE CHOKE

EXPLODED VIEW:

1 Wing Nut 4 Union Seal 2” 1502 7 Choke saver 2 Retainer Ring 5 Body 3 Blanking Cap 6 Split Ring REPLACEMENT PART & PART NUMBER

8  

2” 1502 ADJUSTABLE CHOKE

EXPLODED VIEW:

9  

REPLACEMENT PART & PART NUMBER

10  

`MAINTENANCE WARNING: Tech-Seal Int’l cannot anticipate all of situations a user may encounter while installing, using or repairing products. Therefore, the user must know and follow all applicable industry specifications on the safe installation and use. Failure to follow these warning and instructions could result in serious injury or death!

11  

Disassembly:

NOTE:

Protecting all the sealing surfaces all the time during disassembly or installation process

1. Secure the choke assembly on a stationary safe surface.

2. Bleed off any internal pressure from the choke assembly

3. Loosen the thumb screw and back up the stem away from the seat by turning the

handle CCW.

12  

4. Loosen the hammer nut and remove the bonnet assembly.

5. Using a choke wrench to remove the seat from the choke tee body

13  

6. Remove thumb screw (10), hex nut (1), indicator (4), washer and hand wheel from the stem.

7. Remove the wing nut(3) from the bonnet assembly

14  

8. Unscrew and remove the stem(15) from the bonnet assembly

9. Unscrew two socket cap screws and remove the bonnet cap.

10. Using an adjustable wrench to remove the drive bushing (6).

15  

11. Remove the snap ring (14) from the bonnet seal pocket.

12. Remove stem guide (13), packing retainer (12) and packing set (11) from the seal pocket.

16  

13. Unscrew the wing nut to remove the choke saver (21) from the choke tee body (18).

17  

INSPECTION

- Clean all components

- Visual inspection for corrosion, erosion, or any sign of fatigue crack.

- Check the shoulder radius of the male end connection for any sign of fatigue crack or corrosion damage.

- Check minimum wall at the end connections (see the next page)

18  

19  

- Inspect stem carbide tip, and replace as necessary.

- Inspect stem sealing surface, and replace as necessary

- Inspect stem external thread, and replace as necessary

- Inspect seal pocket surface of the bonnet housing for any sign of wear and damage

20  

- Check the external thread and carbide surface of the seat for any sign of damage.

NOTE:

Tech-Seal Int’l highly recommended any dimensions found to be at or thinner the minimum wall thickness requirements, the part or component must be repaired or replaced. Do not use worn, eroded, corrode products.

21  

TSI Flow Products, Inc. Corporate Office           CLEBURNE, TX   5656 Wheatley St.                  1717 Hines Rd.                           

Houston, TX 77091           Cleburne, TX 76031 

 Phone: (713) 691‐0668          Toll Free: 888.593.9143  

 Fax: (713) 691‐2328           Phone: 817.773.2536       

 Hours: Monday‐Friday, 8AM‐5PM CST.       Fax: 817.506.7697                                                                                              

CORPUS CHRISTI, TX                  BRIDGEVILLE, PA                      

4517 Baldwin             580 Mayer St. 

Corpus Christi, TX 78408           Bridgeville, Pa. 15017 

Toll Free: 877.886.0202           Phone 412‐257‐0100 

Phone: 361.882.0202           Fax: 412‐980‐3722  

Fax: 361.882.0205 .          rchurilla@tsi‐supply.com   

KILGORE, TX              TOWANDA, PA  

302 S. longview St.           Rr#6 box 6019‐9 

Kilgore, TX 75662           Reeves business park 

Toll Free: 877.984.2870           Towanda pa 18848 

Phone: 903.984.2870           570 297 2300 

Fax: 903.983.3750           bpond@tsi‐supply.com