7" Stop Collar Bevelled with Locking Screws

• Diameter：5 1,2" to 20"
• Use：Horizontal Oil Well and Straight Wells
• Surface Treatment：Electrostatic Painting
• Plate Thickness：3.8 mm
• Color：Red, Black, Orange or Others

=== Base Info ===

• Model NO.：ZS71
• HS Code：73072900
• Production Capacity：10000PCS Per Month

=== Description ===

Basic Info.

Model NO. ZS71 HS Code 73072900 Production Capacity 10000PCS Per Month

Product Description

Product overview:

Casing centralizer is one of the necessary conventional casing accessories, casing centralizers can play the role of:

1. Reducing lower casing resistance phenomenon, make the casing down to the designed position.

2. Make casing centralizers centered in the oil well.

3. To reduce the sticking phenomenon to make the annular space hydrostatic pressure balanced.

4. Reduce channeling, improve the mud replacement efficiency, thus improve the cementing quality.

The reset force of double bow type centralizer is higher than the single bow centralizer, the performance is better than single bow type.


Product Description

Bow springs made of spring steel which has been heat teated and hardened tempered to ensure proper and consistent spring characteristics.

End collar hinges are folded toward inside. This way will minimize the collar stretch to occur when centralizers encounter tapers, commonly found in certain type of pipe connections.


A reinforcing rib stamped into the end collar. This way will strengthen and preserve it's round configuration during transport. Centralizers with built-in stop devices as well as those uncommon sizes are available based on request.

Function:
Take casing to designed position by reducing sticking while casing going down.

Let the casing pipe center on the well all the way.

Balance liquid pressure in annular space by reducing adhesion phenomenon.

Improving replacing ratio of mud and boosting cementing quality by reducing channeling effect


Our Services.

Our products and services are closely related to oil drilling and oil well cementation. Our products include integral casing centralizer, welded casing centralizer, bow spring centralizer, float shoe, float collar, Suck Rod Pump, api pumping unit, Thread Protector, Thread Gauge, Api Valve Ball and Valve Seat, coupling and pump plungers.

Packaging & Shipping

Wooden case, standard export packaging, firm enough for long distance sea-shipped, air transportation and railway transportation.


Company Information

The predecessor of Puyang Zhongshi Group Co. Ltd, was the 5th Machine Repairing Factory of Puyang Zhongyuan Oil field, Sinopec Corp. In 1997, after being restructured according to the modern corporate system, the factory was named Puyang Zhongshi Group Co., Ltd.

With registered capital of USD 10.15 million, Puyang Zhongshi Group is composed of 9 subsidiaries, including 8 manufacturers and 1 trade company. Zhongshi Group covers an area of 200, 000 sq. M, including workshop area of 50, 000 sq. M. Various kinds of production equipment values USD 6.5 Million. It has a strong mechanical processing capability.

Our leading products are pumping unit, tubing pump & sucker rod pump, cementing accessories, down-hole tools, wellhead (X-mas tree), drilling solid control series, pressure vessel, camping house, air cannon, belt feeder and so on. They are mainly supplied to Central Asia, Southeast Asia, Africa and Middle East and many other countries.

Zhongshi Group has been the Tier One internet service provider of Sinopec. We passed ISO9001 quality management system certification and got approved to use API monograms on its oil machineries. So far, we have attained API 5CT, API 10D, API 11AX, API 11E and more are applying
For.

With strong technical backup, reliable product quality, advanced marketing regime and good service system, this company wins popularity and recognition of vast consumers home and abroad.

We would like to faithfully cooperate with friends from all circles with classic products and service to achieve common development.

NO.	Specification & Size	I.D. mm	Height mm	Total Height	Max Diameter
1	5" *12-1/4"	128-131	105	690	330
2	5" *20"	128-131	105	720	535
3	5-1/2"* 7"	142-148	55	650	215
4	5-1/2" * 8-1/2"	142-148	55	650	225
5	6" *8-1/2"	156-158	55	650	235
6	7"*8-1/2"	181-186	55	650	235
7	7" *9-5/8"	181-186	55	650	255
8	7-5/8 *9-5/8	197-201	55	650	275
9	9-5/8 * 12-1/4"	250-255	55	650	330
10	13-3/8 * 17-1/2	342-347	55	650	450
11	5-1/2*8-1/2	142-148	110	650	225
12	7" * 9-5/8	181-186	110	650	255
13	7" * 8-1/2	181-186	110	650	235
14	5"* 6-1/2	128-131	110	650	175
15	7-5/8 *9-1/2	196-200	110	650	250
16	10-3/4 *12-1/4	274-276	110	650	330
17	5" *6-1/4	130-132	110	650	170
18	9-5/8 * 12-1/4	250-255	110	650	330
19	13-3/8 * 17-1/2	342-347	110	650	450
20	5-1/2 * 8-1/2"	142-148	55	650	225