RU2506404C2 - Extension mechanism of upper section of derrick of drilling unit - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: invention refers to self-propelled mobile and stationary drilling units, and namely to components of a drilling derrick structure. The invention proposes an extension mechanism of an upper section of a drilling unit derrick, which includes a frame installed in upper part of the lower derrick section, hydraulic motors fixed on the frame and a shaft connecting hydraulic motors through planetary reduction gears fixed on supports. The shaft is installed on bearings and includes two sprockets, on which two roller two-row chains are pulled, as well as a tensioning device for two-row roller chains. Besides, the tensioning device consists of a frame fixed on upper derrick section, a slide installed by means of two bolts, with adjusting nuts, two eye rings with compression springs, poppets attached to the eye rings and nuts with lock pins. Besides, the device includes an attachment joint fixed at the bottom of upper section and including a bracket and a plank attached to the bracket with two bolts with locking washers.

EFFECT: improving operating reliability of the device, reducing overall dimensions, increasing safety, as well as providing repairability under field conditions.

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Description

The present invention relates to the field of oil and gas production equipment, namely to self-propelled, mobile and stationary drilling rigs.

A telescopic tower was chosen as a prototype (see the Reference Manual Mobile Drilling Units and Units for Drilling and Well Repair, Surgut. Advertising and Publishing Information Center Neft Priobya, OJSC Surgutneftegas, 2004, chap. 7, p. 118-121), consisting of two all-welded telescoping sections: lower and upper.

The upper section is equipped with a crown block with guards, rollers for the auxiliary winch rope, rollers for hanging machine keys, brackets for telescoping mechanism rollers, etc.

The lower section is equipped with guide rollers for telescoping.

Brackets with rollers are built into the upper and lower sections to carry out the rope rigging of the system, to telescope the upper section to the operating position driven by a hydraulic winch mounted on the side, the edge of the lower section. In the lower section, from the side of the side faces, four supporting-stopping brackets are installed for supporting and fixing the upper section in the working position. The support brackets with sockets for fixing the pins of the upper section are interconnected in pairs using an axis and clamps. The support and lock brackets are driven by pneumatic cylinders mounted on brackets mounted in the side faces of the lower section. In the raised working position, the upper section, in addition to supporting the support brackets in the sockets, is additionally fastened to the supporting pipes to the lower section by means of pressure bars with prismatic overlays and is fixed with hinged bolts. On the upper section are installed party. The floors are attached to the upper section by the pins using special brackets with brackets and ties.

The disadvantages of the prototype are the following factors:

1. The probability of jamming and breakage of the cable due to slight deformation of the tower and skew winding on the drum, which leads to the fall of the upper section and the failure of the rig for a long period.

2. It was difficult to conduct a flaw detection of the cable in the field.

3. The cable is deformed (stretched) during operation, the rupture of the threads occurs, which ultimately leads to its rupture.

4. In this design, there is no duplication system in the event of a cable break.

5. The complexity of the service. The cable is wound on a drum, and this prevents visual inspection along its entire length.

6. The device for extending the upper section with a cable has large dimensions.

7. The high cost of the device and its maintenance.

8. When a cable breaks or if defects are found, its full replacement is required.

The aim of the invention is to increase the reliability of the device due to duplication (two two-link roller chains), reduce the size, both in volume and in weight, the ability to conduct flaw detection in the field, improve safety by repeatedly increasing the strength characteristics of the claimed device and a significant cheaper in relation to existing mechanisms for telescopic extension of the upper section of the tower in mobile drilling rigs, as well as maintainability p Faces chain (replacement units) in the field. the solutions presented in the alleged invention.

The extension mechanism of the upper section of the rig tower is shown in the following figures:

Figure 1 - kinematic diagram of the node mechanism for the extension of the upper section of the rig tower;

Figure 2 is a front view of the extension mechanism of the upper section of the rig rig

Figure 3 is a top view of the extension mechanism of the upper section of the rig tower;

Figure 4 is a left view of the extension mechanism of the upper section of the rig tower;

6 - node mounting chain extension mechanism of the upper section of the rig rig;

Figure 5 - drive mechanism for the extension of the upper section of the rig tower;

7 is a node reinforcing truss sections of the extension mechanism of the upper section of the rig rig;

Fig. 8 is a tensioning device for roller chains of the extension mechanism of the upper section of the derrick.

The extension mechanism of the upper section of the rig rig tower consists of the following parts and assemblies: frame 1, installed in the upper part of the lower section 2, two hydraulic motors 3, mounted on the frame 1, two planetary gears 4, bearings 5, mounted on the frame 1, shaft 12, connecting hydraulic motors 3 through planetary gears 4, bearings 13, a bearing shaft 12, two sprockets 6 mounted on a shaft 12, support axle sprockets 7, two double-row roller chains 8, a tensioner 9 for roller chains 8, including a frame 19, a slider 20 , two earrings 21, two a bolt 22, a adjusting nut 23, two compression springs 24, a plate 25, a washer 26, a lock nut 27, a cotter pin 28 and a termination assembly 11 consisting of an arm 15, a strap 16, a lock washer 17 and a bolt 17 located in the upper section 10 .

The operation of the extension mechanism of the upper section of the derrick takes place according to the following scheme: hydraulic motors 3 connected by a common shaft 12 through planetary gears 4 mounted on bearings 5 transmit torque to the sprockets 6 through shaft 12, which in turn linearly move two two-link roller chains 8 and the roller chains pull the knot of closing the roller chains 11, fixed at the bottom of the upper section 10, a two-row roller chain 8, is fixed in the bracket 15, the axis 14, which is locked from falling out by the strap 16, fixed to the top sections of the derrick with a lock washer 17 and a bolt 18.

The tensioner for roller chains 9 operates as follows: the slider 20, suspended on bolts 22, acts on the plate 25 through compression springs 24, the earring 21 rises up, eliminating the chain slack, the plate 25 is fixed with a crown washer 27, locked by a spindle 28, the washer 26 protects the surface of the plate 25 from damage.

In the event of the breakdown of one of the two-link roller chains 8, the second chain will continue the linear movement of the upper section of the derrick, and the failed chain is repaired by replacing the links.

Claims (1)

The extension mechanism of the upper section of the rig rig tower, consisting of units and parts for transforming rotational motion into translational motion, characterized in that it includes a frame mounted in the upper part of the lower section, hydraulic motors mounted on the frame, a shaft connecting the hydraulic motors through planetary gears, mounted on bearings, while the shaft is mounted on bearings and contains two sprockets on which two double-row roller chains are tensioned, as well as a tensioner for double-row roller chains, consisting a drawer mounted on the upper section, a slider mounted on two bolts, with adjusting nuts, two compression springs mounted on the earrings, plates attached to the earrings, nuts with cotter pins and a seal assembly attached to the bottom of the upper section and including the bracket and a bracket attached to the bracket with two bolts with lock washers.

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