Technical features

• The time of conventional multi-layer acid fracturing is shortened;
• Horizontal well staged fracturing process is realized by once entry of tools;
• The number of stages is large, which can meet the needs of staged fracturing of ultra-long horizontal wells;
• It realise the integration of completion and modification;
• The ball seat in the sliding sleeve can be drilled and ground to achieve full drift diameter in the wellbore, providing good wellbore conditions for later re-intervention;
• Enhance return on investment.

 

Technical principles

According to the needs of reservoir development, this technology can use open hole packer and sliding sleeve to pack the horizontal well section into several sections, and open the sliding sleeve by ball throwing during fracturing to carry out targeted construction; it can also be used for zonal oil production and zonal water injection. The open hole packer separates each layer, and each sliding sleeve is equipped with a ball seat, which increases upward in turn, with a stage difference of1/8 or 3/16. it can send the low density ball into the oil pipe in turn, and pump it to the corresponding target layer in the ball seat, the sliding sleeve is opened to treat the production layer, and the sliding sleeve at the toe end is opened according to the principle of pressure difference.

Naked-eye Packer + ball dropping sliding sleeve staged fracturing technology Tubular string

The core components of this pipe string assembly are: the dropping and reinsertion system, the tail pipe suspension packer, the open-hole packer, the ball dropping sleeve, the pressure differential sleeve, the circulation sleeve, etc. The supporting tools have stable performance, simple operation and high construction success rate. Their performance indicators exceed those of similar products at home and abroad.

Open-hole packer

Product features

• It is with expandable rubber support ring, which expands with the expansion of the rubber to protect the rubber cylinder effectively；
• Double piston design reduces the setting pressure;
• Ratchet lock ring mechanism maintains setting force;
• It is with pecial anti-midway setting mechanism;
• It is with the large sealing hole diameter, which sealable drilling can expand 15% of the wellbore.

Technical parameters

Model	Total length/mm	* Large outside diameter/mm	* Small diameter/mm	Outer diameter of rubber cylinder/mm	Starting pressure/MPa	Setting pressure/MPa	Operating differential pressure/MPa	Operating temperature/℃	Seal * Large Bore/mm	Suitable for naked eyes/in	Both ends are connected Thread/in
3 ½″	1206	φ146	φ76	φ144.6	10～15	30	80	150	175	6″	3 ½″ UP TBG
4 ½″	1225	φ146	φ97.5	φ144.6	10～15	30	80	150	170	6″	4 ½″ LTC
5 ½″	1380	φ210	φ121.4	φ208	10～15	30	80	150	240	8 ½″	5 ½″ LTC

Outline structure drawing

 

Liner suspension packer

Product features

It is with expandable rubber support ring, which expands with the expansion of the rubber to protect the rubber cylinder effectively；

It has two-way integral slip to ensure no displacement after packer setting;

Ratchet lock ring mechanism maintains setting force;

It is with special anti-midway setting mechanism.

Technical parameters

Model	Total length/mm	* Large outside diameter/mm	* Small diameter/mm	Operating temperature/℃	Job Differential pressure/MPa	Start up Pressure/MPa	Set seal Pressure/MPa	Anchoring force/ kN	Applicable casing/in	Both ends are connected Thread/in
3 ½″	1016	φ150	φ76.2	150	80	12～15	27	>800	7″	上端 4 ½″LTC 下端 3 ½″UP TBG
4 ½″	1490	φ150	φ97.5	150	80	12～15	27	>800	7″	4 ½″LTC
5 ½″	1275	φ210	φ121.4	150	80	12～15	27	>800	9 5/8″	上端7″LTC 下端5 ½″LTC

Outline structure drawing

AnchoringPacker

Product features

■ It has two-way integral slip to ensure no displacement after packer setting;

■ Ratchet lock ring mechanism maintains setting force;

■ It is with special anti-midway setting mechanism.

Technical parameters

Model	Total length/mm	* Large outside diameter/mm	* Small diameter/mm	Operating temperature/℃	Job Differential pressure/MPa	Start up Pressure/MPa	Anchoring Pressure/MPa	AnchoringForce / kN	Anchoring * large diameter/mm	The two ends are connected with threads/in
3 ½″	883	φ144	φ76.2	150	80	12～15	27	>800	φ175	3 ½″UP TBG
4 ½″	965	φ144	φ97.5	150	80	12～15	27	>800	φ175	4 ½″LTC
5 ½″	1150	φ210	φ121.4	150	80	12～15	27	>800	φ240	5 ½″LTC

Outline structure drawing

 

Circulating sliding sleeve

Product features

■ It is with reliable tools, simple structure and quick operation;

■ After the circulation hole is closed, no foreign matter will be left in the pipe;

■ After the ratchet-lock ring mechanism keeps the circulation channel closed, it will not be opened;

■ Opening pressure is adjustable.

Technical parameters

Model	Length/mm	* Large outside diameter/mm	Sealing ball/in	Operating temperature/℃	Operating differential pressure/MPa	Opening pressure/MPa	Suitable for naked eyes/in	The two ends are connected with threads/in
3 ½″	546	φ96	1″	150	70	3.3～13	6″	3 ½″ UP TBG
4 ½″	586	φ132	1″	150	70	3.3～13	6″	4 ½″ LTC
5 ½″	633	φ154	1″	150	70	3.3～13	8 ½″	5 ½″ LTC

Outline structure drawing

 

 

Circulating sliding sleeve

Product features

■ It is with reliable tools, simple structure and quick operation;

■ After the circulation hole is closed, no foreign matter will be left in the pipe;

■ Opening pressure is adjustable.

Technical parameters

Model	Length/mm	* Large outside diameter/mm	Sealing ball/in	Operating temperature/℃	Operating differential pressure/MPa	Opening pressure/MPa	Suitable for naked eyes/in	The two ends are connected with threads/in
3 ½″	610	φ127	φ76.2	150	70	37±1	6″	3 ½″ UP TBG
4 ½″	662	φ146	φ97.5	150	70	37±1	6″	4 ½″ LTC
5 ½″	820	φ185	φ121.4	150	70	37±1	8 ½″	5 ½″ LTC

Outline structure drawing

 

Pitching slip-on

Product features

■ Low density ball has high flowback rate and low flowback pressure;

■ There is a self-locking mechanism in the sliding sleeve to ensure that the sliding sleeve is normally open after opening;

■ The ball seat is made of drillable and grindable materials. After the fracturing operation, it can be reamed and ground to achieve full bore diameter.

■ Opening pressure is adjustable.

Technical parameters

Model	Length/mm	* Large outside diameter/mm	Operating temperature/℃	Operating differential pressure/MPa	Opening pressure/MPa	Flowback pressure/MPa	Suitable for naked eyes/in	The two ends are connected with threads/in
3 ½″	521	φ121	150	70	2.3～22	0.9～9.8	6″	3 ½″ UP TBG
4 ½″	584	φ146	150	70	2.3～22	0.9～9.8	6″	4 ½″LTC
5 ½″	682	φ185	150	70	2.3～22	0.9～9.8	8 ½″	5 ½″LTC

3 ½″ Series tee12 Class Specification: 2″ The following is 1/8 Grade difference; 2″The above is 3/16 Step difference

Specification	1.125″	1.250″	1.375″	1.500″	1.625″	1.750″
Specification	1.875″	2.000″	2.188″	2.375″	2.562″	2.750″

4 ½″ Series tee21 Class Specification: All are 1/8 Step difference

Specification	1.125″	1.250″	1.375″	1.500″	1.625″	1.750″
Specification	1.875″	2.000″	2.125″	2.250″	2.375″	2.500″
Specification	2.625″	2.750″	2.875″	3.000″	3.125″	3.250″
Specification	3.375″	3.500″	3.625″

5 ½″Series tee29 Class Specification: All are 1/8 Step difference

Specification	1.125″	1.250″	1.375″	1.500″	1.625″	1.750″
Specification	1.875″	2.000″	2.125″	2.250″	2.375″	2.500″
Specification	2.625″	2.750″	2.875″	3.000″	3.125″	3.250″
Specification	3.375″	3.500″	3.625″	3.750″	3.875″	4.000″
Specification	4.125″	4.250″	4.375″	4.500″	4.625″

Outline structure drawing

 

Low-density alloy fracturing balls

Product features

■ This ball is made of special materials and processed by special techniques, featuring high wear-resistance, high hardness and resistance to erosion.

■ It is with the high compressive strength, high temperature resistance;

■ It is resistant to chemical substances such as acid, alkali and salt;

■ It is with low density, and easy flowback。

Technical parameters

Densityg/cm3	Operating temperature/℃	Take the strain/MPa
1.55～1.90	150	80

Outline structure drawing

 

Soluble fracturing  balls

Product features

■ The ball uses a specialThe material and the process have the characteristics of high wear resistance, high hardness and erosion resistance;

■ It is with high compressive strength, and high temperature resistance;

■ It is resistant to chemical substances such as acid, alkali and salt;

■ After a certain period of time, it can dissolve quickly.

Technical parameters

Densityg/cm3	Operating temperature/℃	Take the strain/MPa	Complete dissolution time/h
2.6～2.8	150	80	<72

 

Experimental test: The solubility of soluble spheres in aqueous solution increases with the passage of time and the rise of temperature. The dissolution rate intensifies.

 

 

Release and reinsertion system

 

Product features

■ It utilizes a hydraulic and mechanical composite release for safety and reliability.

■ The back-plug connector features a self-locking mechanism, ensuring reliable sealing performance upon reinsertion.

Technical parameters

Model	Length/mm	* Large outside diameter/mm	* Small inside diameter/mm	Operating temperature/℃	Operating differential pressure/MPa	Drop itDifferential pressure/MPa	Suspended load/kN	Applicable casing/in	Both ends are connected Thread/in
3 ½″	1160	φ148	φ76.2	150	70	22~25	>800	7″	3 ½″ UP TBG
4 ½″	1190	φ150	φ97.5	150	70	22~25	>800	7″	4 ½″ LTC
5 ½″	1215	φ190	φ121.4	150	70	22~25	>900	9 5/8″	5 ½″ LTC

Outline structure drawing