| After-sales Service: | on Site on Line |
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| Warranty: | 12 Months |
| Manufacturing Process: | CNC Milling |
| Samples: |
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| Customization: |
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Shipping Cost:
Estimated freight per unit. |
about shipping cost and estimated delivery time. |
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| Payment Method: |
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| Initial Payment Full Payment |
| Currency: | US$ |
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| Return&refunds: | You can apply for a refund up to 30 days after receipt of the products. |
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Suppliers with verified business licenses
Audited Supplier KXJ type bumper sub is a mechanical jarring tool. It allows operators to bump up or down repeatedly until the fishing objectives are met or when the stuck drill stem is released. In event where stuck drill stem cannot be released by lifting and jarring, the bumper sub can be rotated to engage and disengage releasable fishing tools to release the fish. In milling and cutting operations, the bumper sub is used to provide feeding force to the mechanical internal cutter, ensuring a reliable and even cut. When the bumper sub is used with a reversing unit, it helps to compensate the rising stroke for threads after reversing.
Working mechanism
Energy conversion in jarring operation
Downward jarring forced is achieved through the conversion of stored energy to kinetic energy. When lift load is applied to the drill stem, the bumper jar is pulled open to a certain height creating a potential energy. As more lift load is applied, the drill stem begins to accumulate stored strain energy due to the spring extension. Sudden release of the lift load will convert the stored strain energy in the drill stem to a downward acceleration force. As the drill stem accelerate downwards, the bumper jar is released towards its closed position, releasing its potential energy. At this instant, both released energies combine, creating a large downward jarring force.
Main factors that influence the jarring force
Hanging weight on top of drill stem with the bumper jar. Higher hanging weight will create higher jarring force.Length of spring extension of the drill stem. Longer length of spring extension during lifting will provide a greater jarring force. Stroke length of the bumper jar. Longer stroke length will provide a bigger jarring force.
| Specifications-Releasing Spear LM-T | ||||
| Model | Nut QD. (mm) | C^tchsue (in) | LD (mm) | Code |
| MT48 | 35 | 1£ | 8 | LQ2-100 |
| LM-T60 | 45 | 2 3/8 | 8 | LQ2-110 |
| LM-T73 | 54 | 2 7/8 | 10 | L02-120 |
| LM-T89 | 66 | 31/2 | 10 | LQ2-130 |
| LM-T 102 | 76 | 4 | 16 | LQ2-140 |
| LM-T114 | 88 | 4 1/2 | 16 | L02-150 |
| LM-T127 | 96 | 5 | 25 | LQ2-160 |
| LM-T 140 | 108 | 51/2 | 30 | L02-170 |
| LM-T 168 | 130 | 65/8 | 30 | LQ2-180 |
| LM-T178 | 145 | 7 | 50 | LQ2-190 |
| LM-T219 | 174 | 85/8 | 71 | LQ2-210 |
| LM-T245 | 174 | 95m | 71 | L02-220 |
| LM-T273 | 210 | 10 3/4 | 71 | L02-230 |
| LM-T273-1 | 222 | 10 3/4 | 71 | L02-260 |
| LM-T340 | 210 | 13 3/8 | 71 | LQ2-250 |
| LM-T340-1 | 222 | 13 3/8 | 71 | LQ2-240 |
SEACO Oilfield Equip,is manufacturer & stockist of equipments,services and solutions to the upstream to downstream in oil & gas industry.We are aimed at helping customers to obtain the maximum from their each well.Providing our customers superior quality at the best value for products and services in order to ensure our customers' continued satisfaction.
Our main range include but not limited below:
1).Rig packages: 250hp to 3000hp Land drilling rigs; Workover rigs(Fast-moving rigs are available).
2).Rig components: Crown block;Travelling block; Hook; Swivel; Rotary table; Drawwork; Driller's cabin; MCC/SCR house; MCC/VD house; Top drive ect...
3).Wellhead & Pressure control equipments: BOP; Chock & Kill manifold; Pressure hoses; BOP closing unit; Casing&Tubing head; X-Mas tree; Valves; Spools and flanges ect...
4).Solid control & Mud system equipments: Shale shaker; Desander; Desilter; Mud cleaner; Hopper; Centrifuge; Agitator; Mud tanks; Unions,ect...
5).Tubulars & Drilling strings: Drill pipe; HWDP; Drill collar; Kelly; Casing; Tubing; Pup joint; Sucker rod; Line pipes ect...
6).Tubular Running and handing tools: Elevator; Slip; Manual/Power tong; HPU; Bushing; Spinner; Bit breaker; Spider; Links; Stuibing guide; Thread protector ect...
7).Downhole/Fishing tools: Drilling & Fishing jar; Stabilizers; Hole opener; Overshot; Drilling bit ect...
8).Cement tools: Cement unit;Float collar; Float shoe;Liner hanger;Cement head ect...
9).Others: Air winch; Drilling line; Safety equipments; Mud pump spare parts; Rig parts; Fittings ect...
10). Commissioning and other services.
| FAQ |
| Q: How can I place order? |
| A:You can contact us by email about your order details, or place order on line |
| Q: How can l pay you? |
| A:After you confrm our Pl, we will request you to pay.T/T (HSBC bank) and Paypal, Western Union are the most usual ways we are using |
| Q: What's the order procedure? |
| A: First we discuss order details, production details by email or TM. Then we issue you an Pl for your confirmation.You will be requested to do prepaid full payment or deposit before we go into production. After we get the deposit, we start to process the order. We usually need 15-25 days if we don't have the items in stock. Before production has been fnished,we will contact you for shipment details, and the balance payment. After payment has been settled, we start to prepare the shipment for you. |
| Q:How do you take care when your clients received defective products? |
| A:replacement. If there are some defective items, we usually credit to our customer or replace in next shipment. |
| Q: How do you check all the goods in the production line? |
| A:We have spot inspection and finished product inspection. We check the goods when they go into next step production procedure. |
Suppliers with verified business licenses
Audited Supplier 
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