Jining Donghong Machinery Co., Ltd

What is DDZ elevators?

First   D means Center Latch type, second D means Elevator. Z means bottleneck, plain shoulder omitted.

MG Center Latch type Elevator Model DDZ -100 Size 2 3/8-5 100 short tons

RG Center Latch type Elevator Model DDZ -150 Size 2 3/8-5 1/2 150 short tons

MGG Center Latch type Elevator Model DDZ -250 Size 2 3/8-5 1/2 250 short tons

GG Center Latch type Elevator Model DDZ -350 Size 3 1/2-5 7/8 350 short tons

For fop Drive Center Latch type Elevator Model DDZ -35OTD Size 3 1/2-5 7/8 350 short tons

HGG Center Latch type Elevator Model DDZ -500 Size 3 1/2-6 5/8 500 short tons

For Top Drive Center Latch type Elevator Model DDZ -500TD Size 3 1/2-6 5/8 500 short tons

For Top Drive Center Latch type Elevator Model DDZ -750 Size 4-6 5/8 750 short tons

DDZ elevators are center latch elevator with 18 degree taper shoulder,applied in handling the drlling pipe and drilling tools, etc. The load ranges from 100 tons to 750 dons. The size ranges are from 2/8 to 65/8. The products shall be designed and manufactured according to the requirements in API Spec 8C .Specification for Drilling and Production Hoiting Equipment.

DDZ type Elevators are convention bottleneck center latch elevators to handle pipes in oil and gas drilling operation. Read the Manual before use the product.

DDZ type elevators are made from high quality alloy steel with both advanced technology and heat treatment. The elevators are verified by strength test and NDT

referred to ANSI/ASTM A487. The elevators can handle taper shoulder drill pipe from 2%" to 51/z" O.D., plain drill pipe from 3%z" to 5/2", and tubing from 1 .9" to 4%2" O.D. at the temperature minus 20C. The rating loads are as follows: 585kN, 712kN, 900kN, 1125kN, 1350kN, 2250kN, 31 50kN, 4500kN and etc. The sizes of contact surface between elevator and elevator link or between elevator and pipes conform to the specifications of Principal Contact Surface Size for Hoisting Equipment in SY/T 5288 and API Spec 8C.

Center Latch Elevators have been strictly Volumetric Radiographic Tested and Surface NDE and Verification tested and Ex-work tested, every technical parameters

and properties of the equipment offered to customers are in accordance with the specifications of API Spec 8C and SY/T 5035 Elevator link, Elevator and Manual Tong.

DDZ elevators structural principle:

DDZ Center Latch Elevators Series are constructed in two halves of bodies, latch, latch lock (type 1), or shield (type 2), latch pin, hinge pin, and other spare parts.

The two bodies are hinged by hinge pin; the latch is jointed to one body by latch pin and can be rotated around it. The wrench spring is fixed to the latch and can be functioned as restoring. Latch pin and hinge pin are retained by snap spring, which is easy for assemble for disassemble. Shield and wrench spring of type 1 elevator are stationed on latch by shield pin, and the shield can be used to close or open elevator with the force of wrench spring. Latch lock and wrench spring of type 2 elevator are stationed on the latch by bolt. With the force of wrench spring, the latch lock can hook the lock pin of to close the elevator safely. Every elevator has been equipped with two link blocks at both end, such can prevent the elevator fall off from elevator link in lifting operation. To use the type 1 elevator, pull outward the shield, the upper slope of 45° separate from the body it attached, and pull outward on, the latch can separate from the latch cam of the other body, and then the elevator is opened for operation. To use the type 2 elevator, pull outward the handle of the latch lock, the hook separate from the lock pin with the force of small wrench spring, and pull outward on, the latch can separate from the latch cam of the body, and then the elevator is opened for operation. When close the elevator, grasp the two handle of the two halves body and pull them together, the latch will automatically hook the latch cam, or the shield will press latch or latch lock will hook the hook pin, the elevator will be closed and locked tightly. Then the operation of ascending or descending can be carried out.

Specification: