RU2467146C2 - Cluster drilling rig with simplified arrangement - Google Patents

Abstract

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to oil and gas field equipment and is intended for cluster drilling of wildcat and production oil and gas wells. Proposed drilling rig comprises modular units arranged at four parallel guides and in two lines. Additionally, said rig is equipped with set of tanks to keep extra store of water and salt solutions for making drilling and backfilling solutions for well cementing. Said set is arranged in one line with circulation system set and compressor set. Arrangement of said sets may vary in another line. In compliance with first version, behind derrick unit arranged are well cementing unit, pump unit and intake bridge with drilling pipes. In compliance with second version, behind derrick unit arranged are intake bridge with drilling pipes, pump unit and well cementing unit. Note here that unit of electrical equipment is always arranged between well cementing unit and pump unit to allow release excess heat from electrical equipment into pump unit for additional heating of rooms inside rig units.

EFFECT: higher efficiency in far north areas.

5 cl, 3 dwg

Description

The claimed invention relates to oil and gas equipment, namely, to drilling rigs, and is intended for cluster drilling of exploration and production oil and gas wells.

For cluster drilling of exploratory and production oil and gas wells, Russian and foreign manufacturers produce special cluster drilling rigs that allow for cluster drilling (drilling several wells at one drilling site when moving the rig complex along special pedestals-guides or a special base).

The disadvantages of the existing layout of bush installations:

- Placing blocks with capacitive equipment away (in the "pocket") from the drilling rig - this complicates the maintenance and operation of the drilling rig.

- Creation and arrangement of additional remote service areas with additional personnel.

- Creation of various mounting structures for heating mortar communications.

- Dismantling the installation when replacing a unit or introducing an additional unit.

The well-known “Drilling rig” (RF Patent No. 24231, priority date 10/05/2001, patent holder: “Engineering and Economic Development Center of Surgutneftegas Open Joint-Stock Company), containing blocks with drilling equipment installed in a train, fastened together by quick-disconnect connections and connected through passage from the platform to the end block. The disadvantage of this arrangement of blocks is the complexity of the operation to replace the block in case of failure or installation of additional blocks.

Other well-known cluster drilling rigs also contain blocks with drilling equipment: a derrick block, a circulation system block, a mud pump block, a cementing block, a compressor block and an electric equipment block, which are mounted on common rails with the possibility of horizontal movement along two rails. In this case, the equipment blocks of the receiving bridge with racks for working with pipes are located on the side (in the "pocket"), as a rule, perpendicular to the direction of movement of the drilling rig, which is why it is necessary to dismantle the blocks located on the side of the train when moving the train to another well.

A similar construction is, for example, the BU 5000/320 EUK-Y cluster drilling rig (“A new generation of drilling rigs at the Uralmash plant in Western Siberia” by V. G. Kolcherin and others. Reference manual. 2002).

The location of the blocks of the cluster drilling rig on two common guides for movement has significant drawbacks. Placing the processing equipment in blocks sequentially in one line (level) eliminates the possibility of installation in the immediate vicinity of the wellhead, which impairs the performance of technological operations (for example, the cementing unit is located at the end of the level part of the cluster drilling rig). Makes it impossible to install additional units, which reduces the operational efficiency of the installation.

The well-known "Cluster drilling rig" (RF Patent No. 83280, priority date 10/23/2008, patent holder "Closed Joint-Stock Company" Uralmashoborudovanie ", RU). The wellbore drilling rig contains a tower hoist block, a circulation system block, a mud pump block, a compressor block, an electric equipment block, a cementing block, which are arranged in a train, each block being made in the form of a module mounted on guide beams with the possibility of moving along them. For more effective operations of cluster drilling, the design of the installation allows you to install additional blocks. The disadvantage of this analogue is that when additional blocks are installed, the cluster drilling rig significantly increases in length (100 meters or more), which increases the length of the connecting technological and electrical communications, increases the energy costs of pumping fluids and heating the premises, and complicates the maintenance of the drilling rig. Moreover, the arrangement of blocks by echelon leads to a significant increase in the area for a cluster drilling rig, requires large expenses for the preparation of additional areas for its placement and operation, which increases the cost of operating the installation and makes it ineffective. This analogue is taken as a prototype of the claimed invention.

The technical task of the claimed invention is to increase the efficiency of operation of a cluster drilling rig in the construction of wells for cluster drilling in remote northern regions.

The technical result is achieved due to the claimed new layout of a cluster drilling rig with a simplified layout scheme containing blocks made in the form of modules consisting of frames with technological equipment, a cementing unit for wells, a circulation system unit, a pump unit with mud pumps, an electrical equipment unit, a compressor unit , as well as a tower block and a receiving bridge with drill pipes mounted on rails with the possibility of horizontal movement, according to the invention arranged in two rows on 4 parallel rails, while the blocks - modules are connected to the communication system and installed with the possibility of changing their relative position, and the installation is additionally equipped with a unit with capacitive equipment, which is installed in a row with the circulation system unit and the compressor unit , and in the other row, the blocks can be installed in series from the winch block, as in the first embodiment: a cementing unit for wells, a pump unit equipped with a heat generator, and a receiving unit out with drill pipes; or, as in the second embodiment: a receiving bridge with drill pipes, a pump unit equipped with a heat generator, and a well cementing unit. In this case, the electrical equipment unit is installed between the well cementing unit and the pump unit, and a heat generator unit is installed above the compressor unit, which has a common technological connection with the unit with capacitive equipment.

The invention is illustrated by drawings.

Figure 1 shows a General view of a cluster drilling rig with a simplified layout for 4 guides.

Figure 2, 3 shows the layout options of the cluster drilling rig in a plan view.

The claimed invention "Spray drilling rig with a simplified layout" (figure 1), which contains blocks made in the form of modules and consisting of frames with technological equipment: cementing unit 1, circulation unit 2, pump unit 3, electrical unit 4 , compressor block 5, as well as a winch block 6 and a receiving bridge with drill pipes 7, arranged in two rows A and B and mounted on 4 parallel guides 8, 9, 10, 11. In the layout of the installation in one row A with circulating system block s and the compressor unit is further installed with capacitive equipment unit 12 which consists of tanks. In known installations, in view of the long echelon length, blocks with capacitive equipment were additionally installed stationary or brought during these operations. In these tanks there is an additional supply of water and saline solutions. Sometimes, as necessary, drilling fluid is partially pumped into the tanks during its technological replacements. But the main purpose of the tanks is the preparation of water for the preparation of drilling fluids, cement slurries for cementing during cementing the annulus of wells. Also, tanks are designed for the preparation and storage of squeezing solutions, which are used to push the tube space of a well after filling it with cement. The presence of an additional volume of solutions and water prepared to the desired temperature is especially necessary in the cold season.

In row B, the sequence of arrangement of blocks may vary. We consider the installation order of the blocks, starting from the tower block. For example, in the first embodiment (FIG. 2): a well cementing unit 1, a pumping unit 3 provided with a heat generator 13, and a receiving bridge with drill pipes 7. Or, for example, in the second embodiment (FIG. 3): a receiving bridge with drill pipes 7, the pump unit 3, equipped with a heat generator 13, and the cementing unit 1. In this case, the electrical equipment 4 is installed between the cementing unit 1 and the pumping unit 3. The placement of the electrical equipment 4 between the cementing unit 1 and the pumping unit 3 is due to the fact that these blocks in the process The drives do not generate heat, therefore, as a rule, ventilation should be provided. In known installations, this heat is released into the atmosphere. In the claimed utility model, the location of the electrical equipment blocks near the pump unit allows the system to discharge excess heat in winter time to the pump units, thereby additional heating of the rooms inside the unit is provided due to the waste energy.

In a row A, a heat generator 13 is also installed above the compressor unit 5, while the compressor unit has a common technological connection with the unit with capacitive equipment 12.

Work description.

The well construction cycle includes preparatory work, installation of the drilling rig, preparation for drilling, the drilling process, casing strengthening of the well, and cementing of the well.

Before starting the installation of a cluster drilling rig, a site is prepared on which guides 8, 9, 10, 11 are installed parallel to each other (Figs. 2, 3). After that, the installation of the design of the cluster drilling rig is carried out. Blocks-modules, consisting of frames with technological equipment, are placed in two rows A, B on guides 8, 9, 10, 11 in accordance with their functional purpose. After the installation and installation of all blocks of a cluster drilling rig, a technological link is made between the blocks. Then, drill pipes are laid on racks and a receiving bridge to feed them directly to the drilling site. Drilling a well is carried out by lowering the drilling tool on the drill string while supplying the drilling fluid along its circulation circuit. After drilling the first well, the drill string is removed from the well, dismantled into candles (drill pipes rolled in pairs) and installed on the drilling site. Casing pipes are placed on racks and a receiving bridge to lower them into the well. Casing pipes are fed to the drilling site, where they are rolled up and lowered into a drilled well by a column. The annulus between the casing and the borehole wall is concreted using cementing equipment. Having completed cementing work, the cluster drilling rig moves inside the cluster platform along four guides from the well to the well, together with technological and electrical equipment located on the module blocks, without dismantling all module modules, including the receiving bridge and pipe racks, which is essential difference from the prototype. In the prototype, when moving the drilling rig to the next well, it is necessary to dismantle the module modules and pipe racks, which are located on the sides of the train on additional guides, which entails additional costs and complicates the maintenance and operation of the installation.

When using the claimed cluster drilling rig with a simplified layout:

- the occupied space and the service area of the drilling rig were reduced, which reduced the cost of preparing the well pad;

- decreased time spent on moving the entire complex of equipment from well to well;

- The location of the technological equipment of the drilling rig was optimized and the quality of work was improved;

- favorable climatic conditions were created for working with pipes and drilling tools, it became possible to further mechanize the performance of these works, thereby increasing the quality and productivity of the work;

- reduced heat loss to the environment due to the optimization of the geometric shapes of the cluster drilling rig;

- Improved working conditions due to additional heating of the premises.

The technical result from the use of the declared cluster drilling rig is to increase the safety and productivity of staff, improving the working conditions of staff, especially in the cold season, which increased the efficiency of operation of a cluster rig during cluster drilling of exploration and production oil and gas wells, especially in hard-to-reach northern areas.

The cluster drilling rig can be manufactured at a machine-building enterprise of an appropriate profile.

Claims (5)

1. A drilling rig with a simplified layout, containing blocks made in the form of modules consisting of frames with technological equipment, a cementing unit for wells, a circulation system unit, a pump unit with mud pumps, an electrical equipment unit, a compressor unit, and also a hoist winch a block and a receiving bridge with drill pipes mounted on rails with the possibility of horizontal movement, characterized in that the installation is arranged in two rows on 4 parallel rails, while the block and-modules are connected to the communication system and installed with the possibility of changing their relative position, and the installation is additionally equipped with a unit with capacitive equipment, which is installed in a row with the circulation system unit and the compressor unit. 2. The well drilling rig according to claim 1, characterized in that in another row, a cementing unit for wells, a pump unit equipped with a heat generator, and a receiving bridge with drill pipes are installed sequentially from the winch block. 3. The well drilling rig according to claim 1, characterized in that in a different row, a receiving bridge with drill pipes, a pump unit equipped with a heat generator, and a cementing unit for wells are installed in series from the winch block. 4. The well drilling rig according to claim 1, characterized in that the electrical equipment unit is installed between the well cementing unit and the pump unit. 5. The cluster drilling rig according to claim 1, characterized in that a heat generator block is installed above the compressor block, which has a common technological connection with the block with capacitive equipment.

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