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Two-stage Cementer
The MSC-A stage cementer features inner-closing configuration, in which the circulation ports are opened with free-fall or pumping-down opening plug. The closing plug drivers the closing sleeve to shut the circulation ports.
Features：
1.With inner-closing structure,The stage cementer can bring self-locking after closing.
2.The pressure-relief design prevents fluid trapping and compression between the opening device and the closing plug during the closing phase of the tool operation.
3. The I.D.of upper/lower sub is the same as that of casing,but smaller than that of closing sleeve, which can minimize chances of damages to the closing sleeve.
4. The inner seats are made of an easily drillable rubber/aluminum material. Both the opening and closing seats lock against rotation for easy drillout.
5. With pumping-down opening plug,it is used in the operation of continuous cementing.
The HSC-A Hydraulic-Opening stage cementer features inner-closing configuration, opening through pressure difference. The closing plug drivers the closing sleeve to shut the circulation ports.
Features：
1. Opening pressure can be adjusted and it is not subjective to the hole angle or mud properties for operation.
2. The pressure-relief design prevents fluid trapping and compression between the opening device and the closing plug during the closing phase of the tool operation.
3. The I.D.of upper/lower sub is the same as that of casing,but smaller than that of closing sleeve,whichcan minimize chances of damages to the closing sleeve.
4. The inner seats are made of an easily drillable rubber/aluminum material. Both the opening and closing seats lock against rotation for easy drillout.
The accessories of SVMSC/SVHSC Stage Cementer include a first-stage plug, free-fall opening plug,closing plug, shut-off baffle and pumping-down opening plug. Being made of rubber or aluminum, these parts are easily drillable.
Features：
1. The shut-off baffle is installed in the casing collar, one joint above the float collar.
2. The first-stage plug is used to isolate the first-stage cement and drilling fluid. On the end of displacement, the first-stage plug lands and effects a seal against the shut-off baffle.
3. 3. Featuring streamline shape and filled with lead, the free-fall opening plug can quickly free-fall to the lower sliding sleeve. When pressure is applied to the casing, it can open the circulation ports.
4. The closing plug is used to isolate the second-stage cement and drilling fluid. When running to the upper sliding sleeve, it effect a seat in the stage cementer. Pressure is applied to the casing and the circulation ports are closed.
5. The pump-down opening plug is used for continuous cementing operation and in deveated wells. It can open the circulation ports directly and quickly, where an the free-fall opening plug needs longer time waiting for falling.
Mechanical Stage Cement Collar
Applicable to vertical wells or inclined wells with small inclination angle. The tool length is short, which can effectively reduce bending stress.
The strength of all components meets or exceeds the API standard of the corresponding casing.
Single nails installed at a single entrance, greatly reducing potential leakage channels.
Opening and closing pressure can be adjusted according to the actual situation.
Between the body of the grading hoop and the lower joint, it provides the sealing pressure for the metal-to-metal seal and the auxiliary rubber seal Perfectness. The sliding sleeve is anti-rotation design, and has a superior mechanical lock ring structure to prevent it from being reopened after being stressed. The material of the opening plug is aviation series aluminum alloy, and the strength meets the requirements. The length of the open seat and the close seat is short, which can reduce the time of drilling operation. The closing plug is designed with a pressure relief hole to ensure reliable closing.
Features:
1.Anti-rotation mechanism protects the closing sleeve from damage while drilling out the opening and closing seats.
2.No fluid trapping while opening and closing the ports.
3.All internal parts are made of easily drillable material.
4.A Pump-Down Opening Plug can be used for a continuous two-stage cementing operation.
Meet the challenges of cementing holes at any angle with a hydraulically opened port system. Stage collar designed specifically for horizontal completion.It is specifically used for Primary cementing in deep vertical or high deviated horizontal-well conditions. Opening pressure can be adjusted as per oil well request.
Features:
1.Suitable for horizontal wells and high-angle wells
2.Opening pressure can be adjusted as per oil well request.
3.When special thread is used, it is recommended to use a pressure seat to seat the first grade glue
4.The circulation ports can be hydraulically opened, eliminating the need to use a free-fall opening plug.
5.Internal closing structure and anti-rotation mechanism protect the closing sleeve from damage while drilling out the opening and closing seats.
6.All internal parts are made of easily drillable material.
7.When the hydraulic opening is not successful, the opening plug can be put into mechanical opening.
Drilling Free Stage Cement Collar
Features:
1.The circulation ports are mechanically opened by free-fall opening plug.
2.After circulation ports are closed, keep building up pressure will enable the sliding sleeves and other accessories to free fall to bottom, eliminating drill-out.
3.The stage collar is designed with internal closing structure. The closing sleeve is designed with hold down mechanism.
4.Applicable well inclination: ≤25°. Applicable to vertical wells or inclined wells with small inclination angle
5.Close the plug and use POLYPAK seal, it can be more Good sealing effect
6.The closing plug uses a flexible rubber plug. Compared with the conventional closing plug, this kind of closing plug has better passability
