Technical features

• It can rely on the open hole packer to realize the fracturing interlayer packing without additional perforation and well cementation.The construction cost is greatly reduced, and the method is safe and reliable;
• Tools enter the well at one time to realize integration of well completion and reconstruction；
• The construction fracturing progression is not limited.And that operation efficiency is high；
• After the fracturing operation, there is a full drift diameter in the string, which is conducive to the late liquid flowback and subsequent tool running.；
• This is beneficial for subsequent renovation and maintenance. In case of overflow from the production layer, the sliding sleeve can be closed by inserting a sliding sleeve closing tool, thereby achieving the purpose of blocking the bottom water.

Technical principles

The sliding sleeve, open-hole packer and the pipe string assembly are lowered into the well in one trip without cementing. The open-hole packer is used to achieve inter-layer sealing of the fractured zones. By lowering the switching tool through the tubing or the continuous tubing, the external protruding lock block of the switching tool cooperates with the shoulder of the sliding sleeve. When the pipe string is raised, the flow passage of the sliding sleeve is opened to conduct the fracturing operation. After the first fracturing operation is completed, the switching tool is lowered to close the sliding sleeve and open the next lower sliding sleeve until the fracturing operation is finished.

Infinite staged fracturing technology with switchable cementing sliding sleeve Tubular string

 

 

A core component of that pipe column string is as follows: Releasing and back-inserting system, liner hanging packer, open hole packer,Switchable A sliding sleeve,A sliding sleeve switch tool,Circulating sliding sleeve. And the match tool has stable performance, simple operation and high construction success rate.。

 

Switchable sliding sleeve

Product features

• An uplink open mode is adopted;
• The number of fracturing stages is not limited, and there is no need for drilling operation because of the full drift diameter in the string.；
• The sliding sleeve is provided with a positioning mechanism, so that the switching tool can accurately position the position of the sliding sleeve;
• The sliding sleeve has a self-locking function in an opening or closing state, and the function is stable and reliable.

Technical parameters

Model	Total length/mm	* Large outside diameter/mm	* Small diameter/mm	Operating temperature/℃	Operating differential pressure/MPa	On/off load/ kN	Both ends are connected with buckle type/in
4 ½″	900	φ151	φ101.6	150	70	40	4 ½ ″  LTC
5 ½″	970	φ171.5	φ124.3	150	70	40	5 ½ ″  LTC

Outline structure drawing

Sliding sleeve switch tool

Product features

■ The sliding sleeve switch tool is in the normally open state. When pressurized and retracted, the sliding sleeve can be selectively switched.

■ It has a special sand prevention function to prevent the possible sand jamming problems that may occur during operation.

Technical parameters

Model	Total length/mm	* Large outside diameter/mm	* Small diameter/mm	Operating temperature/℃	Withdraw pressure/MPa	Tensile load/kN	Suitable for sliding sleeve/in	Both ends are connected with buckle type/in
HTKG-60	530	φ60.3	φ20	150	4	>300	4 1/2 ″	2 3/8 ″ TBG
HTKG-90	780	φ90	φ30	150	5	>400	5 1/2 ″	2 7/8 ″ UP TBG

Outline structure drawing

Open hole packer

Product features

■ It is with the 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 the special anti-midway setting mechanism;

■ Sealing wellbore diameter is large: It can seal the wellbore diameter expanded by 15% during drilling.

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	The two ends are connected with threads/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 the 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 the special anti-midway setting mechanism;

■ Sealing wellbore diameter is large: It can seal the wellbore diameter expanded by 15% during drilling.

Technical parameters

Model	Total length/mm	* Large outside diameter/mm	* Small diameter/mm	Operating temperature/℃	Operating differential pressure/MPa	Starting pressure/MPa	Setting 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

 

Release and reinsertion system

 

Product features

■ It adopts hydraulic and mechanics compound releasing, which is safe and reliable;

■ The plug with self-locking mechanism ensures reliable sealing performance when being reinserted.

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	The two ends are connected with threads/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

  

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

Outline structure drawing