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Deflecting tools and mill tools


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1.Window Mill
 
The WINDOW MILL is designed to mill the window as fast and safe as possible. The design of the Mill will grind the casing like a fine metal powder instead of metal shavings of chips. With the round nose and radial ground design of the WINDOW MILL, it is virtually impossible to mill up the Eaton BOTTOMTRIP WHIPSTOCK.
 
2.Watermelon Mills
 
The WATERMELON MILL is made to run in tandem with other Window Mill is designed in such a way that it can mill up or down. The WATERMELON MILL is also designed to grind up casing into a fine metal powder instead of metal shavings.
 
3.Starting mill
 
The STARTING MILL is a specialized Milling tools used for orientation of the BOTTOMTRIP WHIPSTOCK as well as landing and setting of the BOTTOMTRIP WHIPSTOCK in a predetermined direction. After shearing the setting stus, the milling operation begins, guided by a tapered pilot, creating the initial cutting of the casting window. 

Deflecting tools produced by the company include ground anchor type deflector and hydraulic setting slip type deflector. Hydraulic setting slip type deflector is provided with accurate direction, solid setting and other characteristics.

  When reservoir casing is seriously damaged or reservoir is collapsed and buried by sands so that oil wells cannot produce oils, to use the upper casings and reduce costs of drilling ahead, window sidetracking can be made on the upper casing on the top of the reservoir to for new boreholes for oil production.

  Window sidetracking in the casing is an important means to drill a deviated well in a well with the lower casings seriously damaged so as to make the well restore production capacity.

  Window sidetracking tools mainly include deflector and window milling taper.

Basic Parameters and Performance Indicators

 

Product Specification and Code

Applicable Casing

Structural Form

Overall Dimension (mm)

Bevel Angle

Bevel Length (mm)

Window Length (mm)

Applicable Well Deviation

Applicable Well Temperature

Setting Method

Connection Thread

DXQ102

5"(ф127)

Common type

ф102×3210

3℃

1730

1600-1800

≤40°

≤200°

Hydraulic setting by ball injecting ★ or direct hydraulic setting

2⅞REG

DXQ102F

Leak protection type

ф102×3720

DXQ114

5½" (ф139.7)

Common type

ф114×3450

1900

1800-2000

NC31★or 2⅞REG

DXQ114F

Leak protection type

ф114×3960

DXQ142

6⅝"(ф168.28)

Common type

ф142×3940

2415

2000-2200

NC38★or 3½REG

DXQ142F

Leak protection type

ф142×4450

DXQ150

7"(ф177.8)

Common type

ф150×4000

2515

2400-2500

NC38★or 3½REG

DXQ150F

Leak protection type

ф150×4200

DXQ160

9⅝"(ф193.68)

Common type

ф160×4200

2700

2500-2700

NC38★or 3½REG

DXQ160F

Leak protection type

ф160×4400

DXQ210

9⅝"(ф244.5)

Common type

ф210×4600

4℃

2600

2700-3000

NC50★or 4½REG

DXQ210F

Leak protection type

ф210×4800

DXQ300

13⅜"(ф339.7)

Common type

ф300×5600

4030

3800-4300

NC50★or 4½REG

DXQ300F

Leak protection type

ф300×5800

 

  Note: the method with  " ★ " is recommended. If the customer has no special requirements, the product with such specifications will be processed by this method.

  Text in the table: Product Specification and Code, Applicable Casing, Structural Form, Overall Dimension, Bevel Angle, Bevel Length, Window Length, Applicable Well Deviation, Applicable Well Temperature, Setting Method, Connection Thread, Common type, Leak protection type

  The company developed the recyclable hydraulic setting deflector based on market demand. Site use effects are very ideal and the product is provided with simple operation, solid setting, high recovery success-rate, reuse and other characteristics. Recyclable deflector consists of deflector, circulating well flushing value and fishing tool.

  1. Deflector bevel uses the cambered surface subject to ultra- hardening treatment. In the case of window cutting, matching between milling taper and angle build-up body is high and bit weight is easily controlled to reduce bit bouncing and bit jumping as well as downhole accidents. Self- locking mechanism in the tool is more complete. Axial and circumferential omnibearing self-locking is used to greatly improve the reliability of the use of tool.

  2. Circulating well flushing value is used to complete liquid connection, indirect flushing and normal circulation hydraulic pressure setting in the process of running the tool. The internal diversion mechanism designed specially can ensure smooth liquid connection in the trip-in and flushing and avoid solid particles and debris precipitated into the internal of the deflector so as to improve reliability of tool use.

  3. Fishing tool uses double fishing mechanisms which are independent and interrelated to greatly improve the success rate of recovery. 

Basic Parameters and Performance Indicators
 

Window milling taper is equipped with the deflector to complete window cutting in the casing.

  The window milling taper is integrated with window cutting and window repair, which can complete window cutting and repair operations once to improve construction speed, thus meeting site construction requirements properly.

  In terms of design, tool appearance, alloy cutting edge angle and selection all are subject to optimization design.

Technical Parameters of Window Milling Taper

 

Applicable Casing

Product Specifications

Maximum OD 
(mm)

Tool Length 
(mm)

Thread Type 
(female )

5"(ф127)

KCXZ104

ф104

980

NC26

5½"(ф139.7)

KCXZ118

ф118

1080

NC31

KCXZ120

ф120

1080

NC31

6⅝"(ф168.28)

KCXZ144

ф144

1150

NC38

KCXZ150

ф150

1150

NC38

7"(ф177.8)

KCXZ152

ф152

1150

NC38

7⅝"(ф193.68)

KCXZ165

ф165

1200

NC38

9⅝"(ф244.48)

KCXZ215

ф215

1600

NC50

13⅝"(ф339.7)

KCXZ310

ф310

2000

NC50


 Casing mill is a downhole tool used to cut off and mill a certain length of casing for cementing plug prior to directional sidetracking. The technology is provided with the advantages of easy directional sidetracking, simple operations, etc.

  Structural Features:

  Adopt the hydraulic piston structure and the design of moving 6 blades by piston movement. The 6 blades can be extended for cutting or milling, with long life and high speed.

  Cut-off display device is provided. When the blade cuts off the casing, the pump pressure is reduced by about 2MPa.

  Adopt special hard alloy cutting elements, with easy cutting, long lift and high milling efficiency.
 

As the extension and development of directional well technology, Branch well is put more and more attention when the directional well and horizontal well technology is becoming more and more perfect. Recyclable whipstock is the key tools in branch well drilling technologies. It plays a vital role for branch well drilling and completion.

The recyclable whipstock made by our company has lots of advantages, such as easy operating, firm sealing, high recovering returns ratio and being reusable and so forth.

Recyclable whipstock is divided into three parts including whipstock, circulation flushing valve and recovery tool.

1. Whipstock
Whipstock adopts hydraulic pressure sealing which is firm and easy to operate. The inclined plane is arc-like and receives super hardening treatment. The milling cone coincides highly with the inclined plane when window cutting. Due to easy controlled drilling pressure, the can drill and dance drill phenomenon is decreasing. Tool internal self-locking mechanism is more perfect. It adopts axial and circumferential self-locking methods which greatly improve the tool reliability.

2. Circulation Flushing Valve
Flushing valve is mainly performed fluid communication when tools are descending, reverse circulation flushing and normal circulation pressure sealing effect. Interior designed special guide mechanism improves tool reliability because it ensures that flushing liquid is smoothly connected when tools are descending, at the same time, avoids the pipe column solid phase particles and impurities to precipitate into the whipstock interior.

3. Recovery tool
Recovery tool adopts double salvage agencies, every component part is independent and interrelated. Therefore, it greatly improves the return rate of recovery tools.

Basic parameters and performance index

 

applied pipe Whipstock Circulation Flushing Valve Recovery tool Adapted Adapted Sealing type
Outline dimensions Buckle type Bevel angle Bevel length Arc-like diameter Outline dimensions Buckle type Outline dimensions Buckle type deviation  temperature
51/2" (φ139.7) φ116x3464 210 3.2° 1900 φ125 φ116x540 211x230 φ116x3856 210 ≤90° ≤200℃ Direct pressure sealing
7" (φ177.8) φ150x3960 310 3.2° 2515 φ165 φ150x630 311x330 φ150x4460 310
95/8" (φ244.4) φ210x4850 410 2650 φ225 φ210x710 411x430 φ210x4960 410

The exploitation of many oil fields has reached the mid-final stage. The old wells recovery and the accident wells increased gradually. The technology of window cutting sidetracking,as a main method to solve these problems, has received wide application.

The conventional whipstock fenestration needs two operations, whip stock and fenestration, which are complex and expensive. However, integral type whip stock realizes the two operations at a time, so it shortens the construction period and save the cost.

The integral construction hydraulic pressure whipstock made by our company has lots of advantages, such as easy operating, firm sealing and short window cutting time and so on.

The integral construction hydraulic pressure whipstock is divided into two parts including whipstock and window cutting milling cone.

1. Whipstock
Whipstock adopts hydraulic pressure sealing which is firm and easy to operate. The inclined plane is arc-like and receives super hardening treatment. The milling cone coincides highly with the inclined plane when window cutting. Due to easy controlled drilling pressure, the can drill and dance drill phenomenon is decreasing. Tool internal adapts safe and reliable pressure transmitting mechanism. The more perfect self-locking mechanism adopts axial and circumferential methods which greatly improve the tool reliability.

2. Window Cutting Milling Cone
Window cutting milling cone and whipstock cooperate to complete window cutting work in pipe. Considering designing, tool shape, cutting edge angle and alloy block selection are optimized. The window cutting milling cone assembles window cutting and fixing as integrality. This design improves the construction speed and shortens the period.

Basic parameters and performance index

 

applied pipe Whipstock Window Cutting Milling Cone Adapted deviation  Adapted temperature Sealing type
Outline dimensions Bevel angle Bevel length Arc-like diameter Outline dimensions Buckle type clipping pressure
51/2" (φ139.7) φ116x3464 3.2° 1900 φ125 φ116x540 211x230 40KN ≤40° ≤200℃ Direct pressure sealing
7" (φ177.8) φ150x3960 3.2° 2515 φ165 φ150x630 311x330 60KN
95/8" (φ244.4) φ210x4850 2650 φ225 φ210x710 411x430 80KN
 
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