Product Description
Summary
Overshot of LT type is one of the fishing tools, from outside of fish. The tools has installed seal, it can circulate drilling fluids in the higher pump pressure after latching on to the fish. The overshot can mill the top of the fish, because it installed mill shoe below. It cooperated with jar to pull out of hole with the stick fish. If it can't unfreezing to hold the fish, overshot would backtrack pull drilling tools out of the hole.
Structure & Principle
Overshot is composed of three outside parts: the top sub, bowl, and guide shoe. It's inside installed fishing grapple, seal, mill shoe and the mill control. There are two kind of overshot's grapple: spiral grapple and basket grapple, there are different dimension of every kind of grapple. When the fish was led into the bailer, the fish move up to the helical slip, and then rotate left and lift the drilling stem. The helical slip's conical surface and the shell's conical surface cause the relative displacement that makes the slip clinch the fish to achieve fishing. When releasing, land and right rotate the pipe string, and while rotating while lifting until releasing the fish. If the fish diameter is near the maximum catch of the overshot, a spiral grapple, spiral control and type "A" packer is used. If the fish diameter is considerably below maximum catch size (usually1/2"), a basket grapple and a mill control packer are used.
Product Parameters
| type |
O.D. of overshot
(mm) |
MAX. fish dimension
(mm) |
connection |
| spire slip |
basket slip |
| LT-T298(11-3/4) |
298(11-3/4) |
10-1/8 |
9 |
6-5/8REG |
| LT-T270(10-5/8 |
270(10-5/8) |
9 |
8 |
6-5/8REG |
| LT-T200(7-7/8) |
200(7-7/8) |
6-3/4 |
6-1/8 |
NC50 |
| LT-T146(5-3/4) |
146(5-3/4) |
4-5/8 |
4-1/4 |
NC38 |
Usage
According to the size of fish choose suitable grapple and seal. Take the overshot connection drilling string (for prevent distortion of the body,so the tongs can't clip both places the internal thread ), the torque connect thread identical the drilling string. Before make a pull, start the pump the mud circulation sufficient. The fish has been held pull out of hole. If it can't unfreezing to hold the fish, pressure overshot 200~500KN and press it several times. After the hook weight increase load pick up drilling string, turn right the drilling tools and pick up slow, it ditto the hook weight till overshot retreat from the fish.
Maintenance
All the overshot has been used must be cleaned and washed, check on the quality of overshot parts, if find flaw, replacing a new one, after install, every threads smear grease and another smear oil to make provision for the future.
Note:1.there is necessary for inspection before using.
2.Operators need to take care on safety operation and personal safety.
Company Profile
Shandong Xilong Machinery Equipment Co Ltd.
Is a professional supplier of various oilfield eauipment in Donavina
Shandong.including APlcertified oil drilling and service equipment.oil production equipmentoil tubing wellhead and downhole tools and accessories.
1.The company has developed various types and complete specifications of oil drilling and production wellhead mechanized tools.
2.Company export countries:Sales cover the country's major oil fields and Europe the United States, the Middle EastCentral AsiaSouth east Asia and other regions.
3.To bring customers what roleshandong Xilong Mechanical machinery equipment co.LTD.in domestic oil fields and the overseas market has a perfect service network,has a complete presale saleafter-sales service systemand provide special conditions accordina to the customer reauest workofcustomized products.domestic products cover the fieldsare exported to North America southeast Asiathe Middle East central Asia and north Africa and otherreaions.
Company service:
1) Good quality control.
2) Competitive price.
3) The most professional sales team.
4) No lanquage barrier.
5) Effective OEM and ODM services.
Packaging & Shipping
Certifications
FAQ
1. How can I place order?
A: You can contact us by email about your order details, or place order on line.
2.How do I pay?
A: After you confirm our PI, we will ask you to pay. T/T (HSBC) and PayPal, Western Union is our most commonly
used method.
3. Do you accept small orders?
A:Yes, don't be too small business. If you're a small retailer or starting a business, we'd definitely love to grow with you. We
look forward to building a long-term relationship with you.
4. Do you have any product inspection procedures?
A: 100% self-test before packaging.
5. What about the price? Can you get cheaper?
A: We always put the interests of our customers at the forefront. Prices are negotiable under different conditions and we assure you of the most competitive price.
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