Technical features

• The number of continuous transformation intervals of a single well shall not be less than 15；
• Any fracturing interval can be selected to control the treatment scale of each interval，The transformation has strong pertinence;
• For thin and poor reservoirs, fine staged fracturing can be realized, with a small packing spacing of 0.8 m;
• Each perforated horizon can be selectively fractured;
• No other tools are needed for auxiliary packing, and full drift diameter is realized after fracturing;
• The tool string adopts double sealing and double clamping, which can be set and released repeatedly;
• The structure of the process string is simple, the construction process is simple, and the operation efficiency is high.

Technical principles

The technical principles are as follows: Continuously drag and set the straddle packer fracturing technology tool string repeatedly. After the tool string is delivered to the target horizon, correct the depth, lift and lower the string to set the bottom packer; when the inject liquid into the tubing is with a displacement of more than 1.5m3/min, the high pressure fluid passing through the restrictor creates sufficient differential pressure to anchor and set the straddle packer. The fracturing fluid and proppant are ejected from the nozzle of the sand blaster. After the fracturing construction is completed, the pump is stopped, the straddle packer rubber and slips are automatically withdrawn, the string is lifted, and the bottom packer is released with the lifting of the string. Tripping out all pipe strings after fracturing to realize full drift diameter.

Drag continuouslyResetting straddle packFracturingProcess stringString

 

The string is consists of Multifunctional release,Straddle packer、A pressure guide sand blaster,Drag Bottom Seal Packer, Collar Locator, Storage Pressure Gauge (optional). The tool is composed of supporting tools with stable performance and simple operation.

Straddle typePacker

Product features

• It is with special rubber structure, reliable sealing performance;
• It is with low pressure difference anchoring and setting, automatic unanchoring and unsetting after pressure relief;
• It is with alloy slip teeth, firmly anchored, suitable for all kinds of steel casing;
• It is with special sand control function，Prevent sand sticking problems that may occur during operation.

Technical parameters

Content	Parameter
Model	KSF-95	KSF-116
* Large outside diameter/mm	φ95	φ116
* Small diameter/mm	φ35	φ50.8
Total length/mm	900	935
Starting pressure/MPa	>1.5	>1.5
Setting pressure/MPa	>6	>8
Work pressure/MPa	70	70
Setting times/Set	>15	>15
Operating temperature/℃	120	120
Applicable casing/in	4 1/2″	5 1/2″
Both ends are connected with buckle type/in	2 3/8″UP TBG	2 7/8″UP TBG

Outline structure drawing

 

Drag bottom seal packer

Product features

• It is with special rubber structure, reliable sealing performance, alloy slip teeth, firm anchoring, suitable for all kinds of steel casing;
•  It is with multi-function combination of circulation, sealing, anchoring and transposition, with compact structure;
• Setting and unsetting can be easily realized by lifting and lowering the string, and the operation is convenient and simple;
• It has special sand control function to prevent sand sticking problems that may occur during operation.

Technical parameters

Content	Parameter
Model	TDF-95	TDF-116	TDF-120
* Large outside diameter/mm	φ95	φ116	φ120
Track travel/mm	161	235
Total length/mm	1460	1415
Operating differential pressure/MPa	60	60
Setting thrust/kN	>10	>10
Setting times/Set	>30	>25
Operating temperature/℃	120	120
Applicable casing/in	4 1/2″	5 1/2″
Both ends are connected with buckle type/in	2 3/8″ UP TBG	2 3/8″ UP TBG 或2 7/8″ UP TBG

Outline structure drawing

 Multifunctional release

Product features

■ Hydraulic and mechanical compound release is adopted;

■ It is with simple operation and reliable performance.

Technical parameters

Content	Parameter
Model	DDS-90	DDS-100
* Large outside diameter/mm	φ90	φ100
* Small diameter/mm	φ32	φ46
Total length/mm	612	620
Pressure bearing/MPa	70
Operating temperature/℃	150
Drop handball diameter/mm	φ35	φ50
Release pressure/ MPa	22～25
Mechanical release torque/kN∙m	2～4
Number of laps reversed	15
Applicable casing/in	4 1/2″/5 1/2″	5 1/2″
The two ends are connected with threads/in	2 3/8″UP TBG	2 3/8″UP TBGOr2 7/8″UP TBG

Outline structure drawing

Conducting pressure Sand blaster

Products Characteristic

■The nozzle is made of special alloy material with hardness HRA > 95 and excellent wear resistance;

■An erosion-resistant pressure guiding and throttling device is installed in the body cavity;

■The outer surface of the sand blaster is equipped with a hard alloy protective sleeve to prevent the back splash of sand blasting from eroding the body.

Technical parameters

Content	Parameter
Model	DPSQ-90	DPSQ-95
* Large outside diameter/mm	The righting partφ95mm Body outer diameterφ90mm	The righting partφ116mm Body outer diameterφ95mm
* Small diameter/mm	φ20	φ20
Total length/mm	330	330
Nozzle diameter/mm	φ20	φ20
Number of nozzles/Only	4	4
Pressure bearing/MPa	70	70
Operating temperature/℃	150	150
Tensile strength/ kN	800	800
Applicable casing/in	4 1/2″	5 1/2″
The two ends are connected with threads/in	2 3/8″UP TBG	2 3/8″UP TBGOr2 7/8″UP TBG

Outline structure drawing

Anti-sand type mechanical couple positioner

Products Characteristic

■It is with special sand control function to prevent possible sand sticking during operation;

■The body adopts a special structure, and uses the elasticity of the body to realize the expansion and contraction at the coupling to generate the induction signal.

Technical parameters

Content	Parameter
Model	CCL-90	CCL-114
* Outer diameter of large steel body/mm	Body outer diameterφ90 Position the outside diameter of the fixture blockφ108	Body outer diameterφ114 Position the outside diameter of the fixture blockφ130
* Small diameter/mm	φ31	φ50.8
Total length/mm	710	750
Operating differential pressure/MPa	70	70
Operating temperature/℃	150	150
Applicable casing/in	4 1/2″	5 1/2″
Both ends are connected with buckle type/in	2 3/8″UP TBG	2 3/8″UP TBGOr2 7/8″UP TBG
Coupling passing induction signal	Hanging weight is available10～20kNFluctuation of

Outline structure drawing