Hydraulic / Mechanical Drilling Jar (HMJ)

Description:

The Bab Alandalus  Hydraulic Mechanical Drilling Jar is an all-purpose Drilling jar suited for all drilling applications. This jar is equipped with a mechanical ‘safety” latch and hydraulic delay when jarring upwards, a Mechanical latch for jarring downwards.

The Bab Alandalus  mechanical “safety” latch keeps the jar locked in the neutral position and eliminates unexpected jarring while tripping or racking the jar in the derrick. Latch release settings can be adjusted to expand the range of the jar placement in the drill string.

Hydraulic Delay while jarring upwards offers the operator the opportunity fire the jars harder or softer. Once the jar starts the delay sequence while jarring up wards the operator can increase the pull to hit harder if desired. It should be noted that the maximum pull during delay should not be exceeded, this limit is provided on our spec sheet.

Benefits & Features

• No safety clamp is required
• Mechanical Latch will keep jar in locked position and prevents unexpected firing while tripping or making connections
• Can be used in extended reach, directional, or horizontal wells
• Jar can be ran in compression or tension if required
• Adjustable latch settings allow jar to be located throughout drill string. (Adjusted in shop prior to shipping)
• Standard seals in the tool are effective to 275 degrees F (135 degrees C). Jars can be serviced with High Temperature seals effective to 500 degrees F or 300 degrees C

• Jar is not effected by continuous firing , does not require long periods to cool down jars
• Hydraulic delay while up jarring allows the operator to vary jarring force (impact) down hole by increasing or decreasing pull
• Mechanical section of the jar and Hydraulic section are separately sealed from each other providing greater reliability
• User friendly and durable design allows jars to be used in many applications if required, Coring, Fishing, Air drilling
• In horizontal, or high angel wells if weight can be applied to jars they are effective in creating a impact

Operation

When jarring up apply overpull to overcome the latch setting, which initiates the hydraulic delay. During this hydraulic delay sequence the jar can be pulled harder if required which increases the impact force. See the Jar specifications to determine maximum pull during delay.

Pick up string weight above the jar + any hole drag above jar + Jar’s latch setting, the jar will now come out of latch.

Example; String weight above jars 120,000 lbs. + hole drag above jars 20,000 lbs. + Jar’s latch setting 85,000 lbs. = 225,000 lbs. required to pull jar out of latch and begin hydraulic delay.

After impact, apply a down force to close jar re-engage latch, then repeat jarring cycle if needed.

Jarring Down;

When jarring down apply weight to Jars to overcome Down latch setting and pump open force, at this point the latch will release in the jar allowing it to fire downwards.

Example; Slack off drill string overcoming latch setting, Down Lock setting 45,000 lbs. + pump open force (if pumps are on) 20,000 lbs. = 65,000 lbs. Jars will fire down.

After impact, pick up drill string to re-latch jars and repeat if needed.

Imperial

Nominal OD (inch)	Length (ft)	Inside Diam	Approx. Weight (lbs)	Pump Open Area (in2)	Torsional Limit (ft lbs)	Nominal Up Latch Setting (lbs)	Nominal Down Latch Setting (lbs)	Max Pull During Delay (lbs)	Tensile Yeild (lbs)
3.50	16-31	1.25	370	6.0	10,300	0-45,000	0-15,000	50,000	190,000
4.75	16-31	2.25	680	11.80	20,000	0-60,000	0-35,000	85,000	352,000
5.25	16-31	2.25	700	11.80	24,000	0-60,000	0-35,000	85,000	352,000
6.25	18-31	2.25	1,400	19.6	46,500	0-90,000	0-45,000	160,000	803,000
6.75	18-31	2.75	1,500	23.8	48,000	0-100,000	0-50,000	190,000	860,500
8.00	19-31	2.81	2,200	30.7	79,600	0-120,000	0-55,000	240,000	950,000
9.00	19-31	3.00	3,200	38.5	162,500	0-120,000	0-55,000	240,000	1,288,000

Metric

Nominal OD (inch)	Length (m)	Inside Diam	Approx. Weight (kg)	Pump Open Area (mm2)	Torsional Limit (N-m)	Nominal Up Latch Setting (daN)	Nominal Down Latch Setting (daN)	Max Pull During Delay (daN)	Tensile Yeild (daN)
89	4.9-9.4	31.8	170	3,900	14,000	0-20,000	0-14,800	22,200	84,500
121	4.9-9.4	57.2	300	7,600	27,100	0-26,000	0-15,500	37,800	156,600
133	4.9-9.4	58	650	7,600	33,100	0-26,000	0-15,500	37,800	180,500
159	5.4-9.4	57.2	630	12,700	65,800	0-42,000	0-20,000	71,200	357,200
165	5.5-9.4	57.2	660	12,700	71,000	0-40,000	0-20,000	71,200	357,200
171	5.5-9.4	69.9	700	15,300	66,200	0-45,000	0-22,000	84,500	382,800
203	3.0-9.4	71.4	1,000	19,800	108,000	0-50,000	0-25,000	106,700	422,600
229	3.0-9.4	76.2	1,400	24,800	220,300	0-50,000	0-25,000	106,700	572,900