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Hejian Wanxiang Drilling Equipments Co., Ltd.
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Product (658)
- Drill Pipes (21)
- Single Cone Bits (4)
- Hole Openers (31)
- Drag Bits (15)
- PDC Core Bits (50)
- PDC bits (135)
- Tricone bits (398)
- Others (4)
Company Trends (12)
Credit Report
Products Index
Company Info
Hejian Wanxiang Drilling Equipments Co., Ltd. [China (Mainland)]
Business Type:Agent, Distributor/Wholesaler
City: Cangzhou
Province/State: Hebei
Country/Region: China (Mainland)
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liyan:
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Company Trends
Preparing the hole
1.Use of a junk basket on the prior bit run is recommended.
2. Inspect previous bit for junk damage and gauge wear.
3.Make clean-up trip if necessary.
4.Make sure hole is clean.
Preparing the bit
1.Transport bit in box to rig foor to avoid damage.
2.Carefully remove bit from the box.Do not set bit directly on steel decking use wood or rubber mat.
3.Inspect bit for damage
4. Record bit serial number.
5.Check o-rings. nozzles and bit gauge.
6.Check inside of bit for obstructions or foreign matter.
Marking up the bit
1. Fit breaker to bit and engage latch.
2.Clean and grease pin
3.Lower drill string to top of pin and engage threads.
4.Locate bit and breaker in rotary table and make up to recommended torque.
Tripping in the hole
1. Remove breaker and carefully lowe bit through rotary table.
2.Trip carefully through BOPs,cashing shoes and liner hangers.
3.Trip slowly through ledges, dog legs and other tight spots.
4.50~60RPM Wash last three joints to bottom with full flow at 50~60rpm
5.15CM~30CM Tag bottom gently and pick up 6~12 inches off bottom
6.50~60RPM,5~10.Circulate 5~10 minutes with full flow at 50~60rpm
Reaming
1.Reaming undergauge hole is not recommended.
2. Ream tight spots with full flow to keep cutters c001.
3.1-250~60RPM Use 2000~4000 pounds WOB and 50~60 rpm
4.Ream slowly-avoid high torque
Bit break in
1.Lower bit to bottom with full full flow at 60~80rpm
2.Compare ecpected VS.Actual hydraulics.
3.Record stand pipe pressure and pump strokes.
4.Deil bottom hole pattern with 2000~4000 pounds WOB.
5.Braek bit in slowly.Do not get a hurry.
6.After three feet,add weight in 2000 pound increments and increase rotary to 100~120rpm
Drilling Ahead
1.Determine optimum drilling parameters by changing WOB and rpm with recommended guideling
2.Conduct drill off tests to maximize ROP.
3.Don't hesitate to adjust drilling parameters
4.Rotary torque should approximate that of rock bits at equal ROP.Faster ROP will normally result in higher torque values.
5.If torque or rpm cycling is severe,control with higher WOB or increased rpm.
6.In harder formations RPM should be reduced to maintain torque and reduce cutter temperature typical RPM in harder formations is 80~110rpm or lower.
Marking connections
1.After making connection, lower to bottom slowly with full flow and 50~60 rpm.
2.Check standpipe pressure and pump strokes on and off bottom.
3.Increase rpm to previous level and add weight slowly.
4.Don't jam the bit back on bottom.
Pulling out of the hole
1.Slow down through tight sport,casing shoes,liner hangers and BOPs.
2. Attach bit breaker and break out bit in rotary table.
3.Avoid cutter damage when removing bit.
4.Don't place bit directly on rotary table.
5.Return bit to box after dull grading.
