China Drying Network Recently, Datang Huayin Electric Power Company's LCC technology, low-grade low-temperature coal pyrolysis and upgrading technology, passed the National Energy Administration's identification.
China's Inner Mongolia is rich in lignite, which has the advantages of cleanliness, low volatility and low sulfur, but is low in calorific value and easy to ignite, and is not suitable for outbound transport. Datang Huayin Electric Power Co., Ltd. saw the economic value of lignite and set out to study the lignite drying technology. In recent years, Huayin Electric Power has introduced foreign advanced clean coal technology and has independently developed and developed LCC technology with independent intellectual property rights. This technology improves lignite dryness. With upgraded lignite, the moisture, volatile matter, and ash content are greatly reduced. The fixed carbon content and calorific value are greatly increased and can be converted into a clean and efficient high-quality energy source.
The LCC demonstration unit produced the first batch of qualified products in June 2011. In the two years from 2011 to 2013, it drove 10 times, with a single continuous over 600 hours of continuous stable operation, drying furnace, pyrolysis furnace, and reactor. Cold plates and other major equipment can meet the long-term operation design requirements. In the course of operation, the overall operation of the equipment is stable, the cumulative average coal tar yield is 3.05%, the average cumulative semi-coke yield is approximately 49%, and the heat generation of semi-coke is increased from 3,400 kcal/kg of raw coal to 5,900 kcal/kg or more. .
At the National Energy Administration's appraisal meeting, experts identified that, compared with other technologies in low-rank coal applications, LCC has advanced technical indicators, strong coal adaptability, simple process flow, safety and environmental protection, and high tar yield. Low energy consumption, low risk of scale-up and ease of adjustment are the advantages of large scale, low cost, and strong market competitiveness. The LCC demonstration unit has achieved key demonstration results and has effectively validated the LCC technology. Experts said that as a new type of technology that fully meets the national industrial policy, its application prospects in the low-rank coal comprehensive utilization field will be very broad.
Bow spring casing centralizers
Bow spring centralizers, both welded and non-welded is to help center the casing in the wellbore, allowing even distribution of the cement around the casing during cementing operations according to API10D standard size from 4-1/2" to 20".
Feature :
A) Designed for high restoring force and low starting& running force.
B) End collars are designed with self-locking action,which are easy to assemble.
C) Undergo special coating process to prevent from rust.
D) Can be shipped in half assemble condition for economy in shipping and storage costs.
E) Specification:4-1/2" to 20". any special size or combination available on request.
Technical parameters:
No |
Specification |
Bow type |
ID(mm) |
Length(mm) |
Max OD (mm) |
Bow spring |
1 |
5-1/2"*8-1/2"
|
I .â…¡ |
142-148 |
600±50 |
225±5 |
5 |
2 |
7"*8-1/2 |
I .â…¡ |
181-186 |
600±50 |
235±5 |
6 |
3 |
9-5/8"*12-1/4" |
I .â…¡ |
250-255 |
600±50 |
330±5 |
8 |
4 |
10-3/4"*12-1/4" |
I .â…¡ |
274-276 |
600±50 |
330±5 |
9 |
5 |
13-3/8"*17-1/2" |
I .â…¡ |
342-347 |
600±50 |
450±5 |
11 |
6 |
20"*26" |
I .â…¡ |
510±1 |
600±50 |
660±5 |
12 |
Note :â… (single bow),â…¡(double)
Cementing plugs:
Cementing plugs from high performance material such as rubbers and phenolic resins.our cementing plugs are specially designed with a positive wiping action to ensure that the casing is clean, we have both conventional standard plugs and non-rotating plugs.
Top plugs
The top cementing plug is designed to exert continuous pressure on the casing wall. The core is made of aluminum or phenolic depending on the application and well conditions, the tapered base fits the cavity of the bottom plug initiating a positive seal. A solid rubber top plug is also available.
Bottom plugs:
Like the top cementing plug,the fins and tail section provide positive wiping action. Fins also serve as a seal while cementing. The core of bottom plug is alao made of special material such as aluminium or phenolic resins depend on the application and well conditions, a rubber diaphragm at the top bottom plugs ruptures after the plug is seated allowing cement to flow through
TECHNICAL PARAMENTERS
Type |
Sizes |
Working temperature |
Working pressure |
Burst pressure |
hardness |
Top plug&bottom plug |
4-1/2",5-1/2",6-5/8",7",8-5/8",9-5/8" standard/ non rotating |
-30℃ to 150℃ |
≥15MP |
1MP-2MP |
75-95 |
13-3/8",20"standard/ non rotating |
-30℃ to 150℃ |
≥10MP |
1MP-2MP |
75-95 |
Float collar and float shoe
Float equipment serves the backbone of casing equipment used during primary cementing operations, float equipment guides the casing to total depth and prevents contaminated mud from entering the casing. Also,it provides a landing point for casing wiper plugs, reinforces the lower end of the casing string, and ensures greater accuracy of cement slurry displacement.
FEATURES:
API 5CT,API 5B,API RP 10F rating,china petroleum department standarc SY/T5618-2000.
Rounded nose profile helps guide the casing string(only for float shoe).
The valve is made with phenolic material and molded with high strength concrete. Both the calve and concrete are easily drillable with PDC or rock bits.
High strength design ensure excellent performance for flow endurance and back pressure holding.
Automatically non-rotational groove design ensures corresponding cementing plugs drilled out quickly(only for non-rotating float collar).
Single valve and double valve versions are available. Spring structure and bal structure valve are available: insret type and normal type are available.
Material and size:
API CASING GRADE: J55,K55,N80,P110,L80,etc.
SIZE VARY FROM 4"TO 20"
AVAILABLE CONNECTIONS:
API5RD CONNECTIONS:LTC,STC,BTC
Solid rigid casing centralizers
Rigid centralizers are an integral part of the cementing process. They provide the mechanism that centers the casing in the hole and allows uniform cement flow around the casing to help protect it at all point. Several styles of centralizers are available for matching different well specification and hole size,including turbulence generating designs that help clean the annulus and distribute the cement more evenly and uniformly. All models offer ample clearance for fluid passage and are extra effective in centering the casing, even in highly deviated hole and improve cement flow by reducing the effects of channeling.
Technical parameters
Model |
Style |
Max OD(mm) |
ID(mm) |
Length(mm) |
GF4-1/2x6 |
â… .â…¡.â…¢ |
145 |
116.5 |
200 |
GF5x6 |
â… .â…¡.â…¢ |
145 |
129 |
200 |
GF5-1/2x8-1/2 |
â… .â…¡.â…¢ |
205-210 |
142 |
200/300 |
GF6-5/8x8-1/2 |
â… .â…¡.â…¢ |
205-210 |
171 |
200/300 |
GF7-8-1/2 |
â… .â…¡.â…¢ |
205-210 |
181 |
200/300 |
GF7-9-1/2 |
â… .â…¡.â…¢ |
225-235 |
181 |
200/300 |
GF7-9-5/8 |
â… .â…¡.â…¢ |
225-235 |
181 |
200/300 |
GF9-5/8x12-1/4 |
â… .â…¡.â…¢ |
300-305 |
248 |
200 |
GF13-3/8-17-1/2 |
â… .â…¡.â…¢ |
430-435 |
346 |
200 |
Note: GF series rigid casing centralizer, classified as straight strip type (typeâ… ),spiral(type â…¡),roller type(type â…¢).
Stop collar
Stop collar is used to hold centralizers or cement baskets on any position casing, which ensures the position of centralizers or cement basket to meet the design, the stop collars are available in two types hinges type,slip on type, the stop collars can be installed on casing to limit the axial movement of centralizers and cement baskets.
Usage
1. Fastening screw stop ring when use, first set into the casing ,and then using a wrench to tighten the screws.
2. Fixed screw type when use ,first set into the casing,and then insert screws,Type in with a hammer.
3. Snap fit stop ring, direct stop ring button on the casing,use pin lock, then knocked into the screw.
Hinged bolted stop collars
An economical collar suitable for sub-critical annular tolerances,available in the size range 4-1/2" to 20",it has a cross bolt design which makes it an efficient and user friendly device.
Hinged spiral nail stop collars
Available in the size rang 4-1/2"-20",this device can be in both upset and non-upset casing to provide maximum clearance during rotation. It has a grove in the middle into which a spiral nail can be driven for improved grip on the casing, the broader firmly grips the collar into position around the casing.
Hinged stop collars with set screw
Available in the size rang 4-1/2" to 20", this device has a high cost-utility ratio. This hinged collar with a row of set screw position easily and firmly around the casing.
Slip on stop collars with set screw
This slip-on set screw device is recommended for small hole operations,available in size rang 2-7/8" to 20"and is gripped by a row of screw, this is a heavy duty device.
Cementing tools
Henan Dongfanglong Machine Manufacture Co., Ltd , https://www.eastlongmachine.com