Drilling swivel is the main equipment Downhole spin cycle, it is both the connection between parts of the system and to enhance the drill, part of the circulatory system is connected to the rotating system. drilling swive upper swivel bail by hanging on hook block, next to the swan neck connected by rotary hose, the lower pick grief kelly and underground drilling, overall the car can run with the next tour.
1.Downhole Drilling swivel on request
1. Drilling swivel action of
(1) suspended drilling, bear the full weight of the downhole drill.
(2) ensure free rotation of the lower part of the drill and grief kelly upper joint is not upside down.
(3) connected with Drilling swivel, turning to the inside of the drill pipe to pump high-pressure liquid to achieve circulation drilling.
Thus, Drilling swivel to achieve promotion, rotation, cycle three major roles, is an important component of rotation.
2. Downhole Drilling swivel on request
The main bearing member (1) Drilling swivel as swivel bail, pipe base, load bearing, to have sufficient strength.
(2) wash pipe assembly sealing systems have a high pressure resistance, wear resistance, corrosion resistance, easy to be convenient to replace the damaged parts.
(3) Low oil seal system to be sealed, corrosion resistance and long service life.
(4) Drilling swivel form factor structure should be smooth without edges, swing angle swivel bail should be able to easily hang rotary hook.
2. Drilling swivel structure
Drilling swive model field use more, but roughly the same structure, mainly by fixed rotation and seal three major components.
1. SL-70-type Drilling swivel
1) a fixed portion
SL-70 Drilling swivel-type structure shown in Figure 1, the fixed part by swivel bail, case, cover, swan neck and other components.

Figure 1 SL-70-type structure diagram Drilling swivel
1- casing; 2- plugs; 3- nameplate; 4- swivel bail; 5- swan neck; 6- shelters; 7- pressure on the cap; 8- wash pipe; 9- seal assembly; 10- under pressure cap ; 11- oil seal on; 12- bearing; 13- butter mouth; 14- swivel bail pin; 15- main bearings; 16- bearings; 17- under the oil seal; 18-T-ring; 19- gland ; 20- circlip; 21- joints; 22- retaining wire sets
Housing is a hollow interior for sump steel castings, alloy steel for general use. Slots with the housing pin and swivel bail activities on both sides of the connection, there are perforations on the radial and axial pin, fitted on the grease fitting to lubricate the contact surfaces of the pin and swivel bail facilitate rotation. Since both sides of the slot for the through-hole, and therefore provided with seals on the pin, the closed oil reservoir. In the case outside the screw for filling and dump oil, tight by the plug.
In the upper part of the housing fitted lid, cover, also known as bracket with screws in the top of the housing. Mounted between the upper bracket and pipe base centering bearing with seals bearing centering the top to seal the pipe base and oil tanks, the upper bracket with screws swan neck. end of the swan neck fitted coarse buckle Hammer union, and rotary hose for connecting; the other end of the outer sleeve in the wash pipe, fixed by the pressure cap seal. The lower end of the pipe base docking wash pipe, joints sealing components made by under pressure cap screwed on pipe base, making it reliable sealing.
Lower housing with screws bottom, bottom centering mainly used against the backdrop of bearings, seals and casing pipe base oil pool.
2) rotating part
The main component is the rotating part of the pipe base and bearings. The diameter of the upper pipe base, and have a connection under the pressure cap screw and stairs. On the steps to fix the centering bearing; next steps for securing the load bearing. Downhole drill through the pipe base load by load bearing housing on the drilling swive in load bearing fitted below under centering bearing, two bearing lubricating oil through the oil tanks. Upper and lower radial centering bearing will produce power when the pipe base rotating pendulum, so pipe base centering center. When the pipe base rotation, under the pressure cap and seal assembly rotates along with the pipe base.
3) sealing portion
(1) wash pipe sealing device is the most important and drilling swive weakest link, is rotating and fixed part of the seal to withstand high pressures. It uses a V-ring, mounted in a sealed box, and then by the pressure cap mounted on its pipe base, through the pressure cap to adjust the degree of its seal, seal with grease lubrication.
(2) on the oil seal, drilling fluid is to prevent dirt from entering the interior of the housing, preventing sump oil spill, to withstand the low pressure.
(3) Under oil sealing means, the main role is to prevent oil leakage sump withstand low pressure.
In addition, in order to protect the lower part of the threaded pipe base for easy connection with grief kelly in the lower pipe base with fine joints Flip connection protection, the protection of the other end of the connector for crude Flip.
2. SLT a 30-2 type portable Drilling swivel
SLT a 30-2 Drilling swivel type light is a more convenient use in the field of rotating equipment, it is compared with the general Drilling swivel, with small size, light weight, easy to use, simple structure, easy to manufacture, low cost, easy maintenance, seal does not leak and so on.
The Drilling swivel mainly by the cover, shell, spindle, bearings, seals, oil seals, grease fittings, the top wire and other components, and its working principle is: a short section of the superstructure to enhance the use of access by elevator hanging hook block on the lower end of the threaded spindle connection with grief kelly mandrel connected by the thrust bearing and the housing, the housing and the cover together with thread. When rotated, the drill spindle driven by a thrust bearing rotation, while the swimming portion of the casing above the system and then to remain intact, and thus play a role in both the rotation and can carry. Cycle when necessary, in the upper part of a short section connected with Swivel joint promotion with rotary hose, you can cycle flushed, SLT a 30-2 type drilling swive the structure shown in Figure 2.

Figure 2 SLT a 30-2 Drilling swivel type portable structure
1- swan neck; 2- mandrel; 3- seal; 4- bearing; 5- butter mouth; 6- case; 7- bearing; 8- copper pad; 9- top wire; l0 a ring; 11- on cover
3. SLl60 type drilling swive
SLl60 type drilling swive mainly by the swivel bail, case, cover, main bearings, auxiliary bearings, centering bearing, swan neck, wash pipe, sealed boxes, pipe base, etc., shown in Figure 3.

Figure 3 SLl60 type Drilling swivel
2- swivel bail pin;; 1- 3- shell cup oil; 4,8,21,49- bolt; 5,22,50- spring washer; 6- plate; 7- pipe base; 9- gasket; 10 - damping block; 11- screws; 12- rivets; 13-API signage; 14,17- gaskets; 15- dipstick; 16- breathable plug; 18- sealed box; 19- on the sealed box; 20- pressure hat; 23 swivel bail; 24 swan neck; 25 retainer; 26,33 "O" ring seal; 27- sealing gland; 28- seal; 29- wash pipe; 30- bush; 31,32- spacer ring; 34- pressure cap; 35- under seal gland; 36- joints; 37- rubber umbrella; 38,51- sets; 39- seal spacer ring; 40- seal; 41- bearing race; 42- bracket; 43,44,45- bearing; 46- seal; 47- gasket; 48- bearing caps; 52- transition joints
1) Structural features
(1) floating wash pipe structure, wash pipe and lid, pipe base floating connection and prevent eccentric wear, fast loading and unloading.
(2) sealed box with Y-shaped spacer ring and overlapping arrangement, subject to its own drilling fluid pressure seal is provided with a grease fitting, grease lubrication injection Y-shaped ring, long service life; with the overall rapid wash pipe assembly, disassembly, easy to replace the seals and wash pipe.
(3) swan neck tube end is provided with movable joints, and drilling rotary hose with high pressure drilling fluid delivery.
2) Technical parameters
SLl60 type Drilling swivel technical parameters shown in Table 1.
Table 1 SLl60 type Drilling swivel technical parameters

3. Troubleshooting
Table 2 briefly describes the drilling swive in the use of common faults and troubleshooting.
Table 2 Drilling swivel common faults and troubleshooting

4. Technical specifications of Drilling swivel
Drilling swivel common technical specifications in Table 3.
Table 3 Drilling swivel of common technical specifications

5. Drilling swivel rational use and maintenance
(1) New Drilling swivel pressure must be tested before use.
(2) Drilling swivel joint protection when moving up, and transport, should take care silk or other soft material wrapped to prevent damage the threads.
(3) Check the oil level before using height to meet the requirements, wash pipe sealed boxes, sealing seat, swivel bail pins, pneumatic rotary head for each cup oil lubrication.
(4) pre-use check on a sealed box gland, wash pipe sealed box is properly adjusted. A person can use 914mm chain tongs to rotate freely pipe base, that is appropriate.
(5) New Drilling swivel, for a long time to start drilling swive disabled, you should slow-running, be flexible rotation, and then provide the speed.
(6) Low Start Drilling swivel, should pay attention to the case of drilling swive water drilling through the eye, especially when winter starts, should take measures to prevent freezing, to ensure smooth flow of water eye.
(7) work, should always check the wash pipe, whether under seal washout box, upper and lower seat seal leaks oil.
(8) to detect drilling swive case temperature, the normal operating temperature does not exceed 75 ℃.
(9) work should always check the swan neck flange connections are secure, swan neck and rotary hose connected to the union whether washout.
(10) work should always check the drilling swive anti-twist rope insurance, insurance rope swan neck and rotary hose must remain intact.
(11) Drilling swivel with the grief kelly docking, must apply thread oil.
(12) spinner is mainly used for drilling, workover process received a single shackle on the job.
(13) In the case of an emergency, when the drill string is not allowed turntable drive, you can use the spinner to make a short drive drillstring rotation.
(14) can be used for playing spinner mousehole work.